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blabla/PATSTAT/CPCSchemeXML202302/cpc-scheme-G02F.xml

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<?xml version="1.0" encoding="UTF-8"?>
<class-scheme publication-date="2023-02-01" scheme-type="cpc" publication-type="official">
<classification-item breakdown-code="false" not-allocatable="true" level="5" additional-only="false" sort-key="G02F" definition-exists="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN</text></title-part><title-part><text>NON-LINEAR OPTICS</text></title-part><title-part><text>FREQUENCY-CHANGING OF LIGHT</text></title-part><title-part><text>OPTICAL LOGIC ELEMENTS</text></title-part><title-part><text>OPTICAL ANALOGUE/DIGITAL CONVERTERS</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="warning"><note-paragraph warning-type="ipc-not-used">The following IPC groups are not in the CPC scheme. The subject matter for these IPC groups is classified in the following CPC groups: <br/> Subject matter covered by these groups is classified in the following CPC groups: <table><row><entry><class-ref scheme="ipc">G02F1/13357</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">G02F1/1336</class-ref> and subgroups </entry></row></table></note-paragraph><note-paragraph>In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.</note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="G02F1/00" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/00</classification-symbol>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G02F1/00" definition-exists="true" ipc-concordant="G02F1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating</text></title-part><title-part><text>Non-linear optics</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> This group <u>covers</u> only : <subnote type="bullet"><note-paragraph>devices or arrangements, e.g. cells, the optical operation of which is modified by changing the optical properties of the medium of the devices or arrangements by the influence or control of physical parameters, e.g. electric fields, electric current, magnetic fields, sound or mechanical vibrations, stress or thermal effects; </note-paragraph><note-paragraph>devices or arrangements in which the electric or magnetic field component of the light beams influences the optical properties of the medium, i.e. non-linear optics; </note-paragraph><note-paragraph>control of light by electromagnetic waves, e.g. radio waves, or by electrons or other elementary particles. </note-paragraph></subnote></note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02F1/0009" definition-exists="true" ipc-concordant="G02F1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Materials therefor</text></CPC-specific-text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph><class-ref scheme="cpc">G02F1/0009</class-ref> and subgroups contain mostly non-patent literature </note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/0018" definition-exists="false" ipc-concordant="G02F1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0018</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electro-optical materials</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/0027" definition-exists="true" ipc-concordant="G02F1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0027</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Ferro-electric materials</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/0036" definition-exists="true" ipc-concordant="G02F1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0036</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Magneto-optical materials</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/0045" definition-exists="true" ipc-concordant="G02F1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0045</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Liquid crystals characterised by their physical properties</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/0054" definition-exists="false" ipc-concordant="G02F1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0054</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Structure, phase transitions, NMR, ESR, Moessbauer spectra</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/0063" definition-exists="false" ipc-concordant="G02F1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0063</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Optical properties, e.g. absorption, reflection or birefringence </text><reference><text>materials for non-linear optics <class-ref scheme="cpc">G02F1/355</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/0072" definition-exists="false" ipc-concordant="G02F1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0072</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mechanical, acoustic, electro-elastic, magneto-elastic properties</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/0081" definition-exists="false" ipc-concordant="G02F1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0081</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electric or magnetic properties</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/009" definition-exists="true" ipc-concordant="G02F1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/009</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Thermal properties</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02F1/01" definition-exists="true" ipc-concordant="G02F1/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/01</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>for the control of the intensity, phase, polarisation or colour&#160; </text><reference><text><class-ref scheme="cpc">G02F1/29</class-ref>, <class-ref scheme="cpc">G02F1/35</class-ref> take precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/0102" definition-exists="false" ipc-concordant="G02F1/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0102</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Constructional details, not otherwise provided for in this subclass</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/0105" definition-exists="true" ipc-concordant="G02F1/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0105</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Illuminating devices</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/0107" definition-exists="true" ipc-concordant="G02F1/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0107</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Gaskets, spacers or sealing of cells; Filling and closing of cells</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/011" definition-exists="true" ipc-concordant="G02F1/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/011</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>in optical waveguides, not otherwise provided for in this subclass</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/0113" definition-exists="false" ipc-concordant="G02F1/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0113</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Glass-based, e.g. silica-based, optical waveguides</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/0115" definition-exists="false" ipc-concordant="G02F1/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0115</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in optical fibres</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/0118" definition-exists="false" ipc-concordant="G02F1/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0118</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by controlling the evanescent coupling of light from a fibre into an active, e.g. electro-optic, overlay</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/0121" definition-exists="false" ipc-concordant="G02F1/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0121</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Operation of devices; Circuit arrangements, not otherwise provided for in this subclass</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/0123" definition-exists="false" ipc-concordant="G02F1/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0123</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits for the control or stabilisation of the bias voltage, e.g. automatic bias control [ABC] feedback loops</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/0126" definition-exists="false" ipc-concordant="G02F1/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0126</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Opto-optical modulation, i.e. control of one light beam by another light beam, not otherwise provided for in this subclass</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/0128" definition-exists="true" ipc-concordant="G02F1/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0128</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on electro-mechanical, magneto-mechanical, elasto-optic effects</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/0131" definition-exists="true" ipc-concordant="G02F1/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0131</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>based on photo-elastic effects, e.g. mechanically induced birefringence</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/0134" definition-exists="false" ipc-concordant="G02F1/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0134</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in optical waveguides</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/0136" definition-exists="false" ipc-concordant="G02F1/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0136</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for the control of polarisation, e.g. state of polarisation [SOP] control, polarisation scrambling, TE-TM mode conversion or separation </text><reference><text><class-ref scheme="cpc">G02F1/0353</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/0139" definition-exists="false" ipc-concordant="G02F1/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0139</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Polarisation scrambling devices; Depolarisers</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/0142" definition-exists="false" ipc-concordant="G02F1/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0142</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>TE-TM mode conversion</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/0144" definition-exists="false" ipc-concordant="G02F1/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0144</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>TE-TM mode separation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/0147" definition-exists="true" ipc-concordant="G02F1/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0147</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>based on thermo-optic effects </text><reference><text><class-ref scheme="cpc">G02F1/132</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/015" definition-exists="true" ipc-concordant="G02F1/015" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/015</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>based on semiconductor elements with at least one potential jump barrier, e.g. PN, PIN junction </text><reference><text><class-ref scheme="cpc">G02F1/03</class-ref> takes precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/0151" definition-exists="false" ipc-concordant="G02F1/015" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0151</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>modulating the refractive index</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/0152" definition-exists="false" ipc-concordant="G02F1/015" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0152</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>using free carrier effects, e.g. plasma effect</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/0153" definition-exists="false" ipc-concordant="G02F1/015" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0153</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>using electro-refraction, e.g. Kramers-Kronig relation</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/0154" definition-exists="false" ipc-concordant="G02F1/015" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0154</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>using electro-optic effects, e.g. linear electro optic [LEO], Pockels, quadratic electro optical [QEO] or Kerr effect</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/0155" definition-exists="false" ipc-concordant="G02F1/015" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0155</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>modulating the optical absorption</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/0156" definition-exists="false" ipc-concordant="G02F1/015" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0156</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>using free carrier absorption</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/0157" definition-exists="false" ipc-concordant="G02F1/015" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0157</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>using electro-absorption effects, e.g. Franz-Keldysh [FK] effect or quantum confined stark effect [QCSE]</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/0158" definition-exists="false" ipc-concordant="G02F1/015" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0158</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Blue-shift of the absorption band</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/0159" definition-exists="false" ipc-concordant="G02F1/015" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0159</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Red-shift of the absorption band</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/017" definition-exists="false" ipc-concordant="G02F1/017" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/017</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Structures with periodic or quasi periodic potential variation, e.g. superlattices, quantum wells</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/01708" definition-exists="false" ipc-concordant="G02F1/017" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/01708</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in an optical wavequide structure</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/01716" definition-exists="false" ipc-concordant="G02F1/017" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/01716</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optically controlled superlattice or quantum well devices</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/01725" definition-exists="false" ipc-concordant="G02F1/017" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/01725</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Non-rectangular quantum well structures, e.g. graded or stepped quantum wells</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/01733" definition-exists="false" ipc-concordant="G02F1/017" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/01733</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Coupled or double quantum wells</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/01741" definition-exists="false" ipc-concordant="G02F1/017" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/01741</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Asymmetrically coupled or double quantum wells</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/0175" definition-exists="false" ipc-concordant="G02F1/017" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0175</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>with a spatially varied well profile, e.g. graded or stepped quantum wells</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/01758" definition-exists="false" ipc-concordant="G02F1/017" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/01758</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>with an asymmetric well profile, e.g. asymmetrically stepped quantum wells</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/01766" definition-exists="false" ipc-concordant="G02F1/017" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/01766</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Strained superlattice devices; Strained quantum well devices</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/01775" definition-exists="false" ipc-concordant="G02F1/017" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/01775</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>involving an inter-subband transition in one well, e.g. e1-&gt;e2</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/01783" definition-exists="false" ipc-concordant="G02F1/017" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/01783</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Quantum wires</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/01791" definition-exists="false" ipc-concordant="G02F1/017" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/01791</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Quantum boxes or quantum dots</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/025" definition-exists="true" ipc-concordant="G02F1/025" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in an optical waveguide structure </text><reference><text><class-ref scheme="cpc">G02F1/017</class-ref>, </text><CPC-specific-text><text><class-ref scheme="cpc">G02F1/2257</class-ref></text></CPC-specific-text><text> take precedence</text></reference></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/03" definition-exists="true" ipc-concordant="G02F1/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/03</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect </text><reference><text><class-ref scheme="cpc">G02F1/061</class-ref> takes precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/0305" definition-exists="false" ipc-concordant="G02F1/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G02F1/0305</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>Constructional arrangements </text><reference><text><class-ref scheme="cpc">G02F1/0327</class-ref>&#160;-&#160;<class-ref scheme="cpc">G02F1/05</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/0311" definition-exists="false" ipc-concordant="G02F1/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0311</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Structural association of optical elements, e.g. lenses, polarizers, phase plates, with the crystal</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/0316" definition-exists="false" ipc-concordant="G02F1/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0316</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electrodes</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/0322" definition-exists="false" ipc-concordant="G02F1/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0322</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements comprising two or more independently controlled crystals</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/0327" definition-exists="false" ipc-concordant="G02F1/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0327</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Operation of the cell; Circuit arrangements </text><reference><text><class-ref scheme="cpc">G02F1/05</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/0333" definition-exists="true" ipc-concordant="G02F1/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0333</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>addressed by a beam of charged particles </text><reference><text><class-ref scheme="cpc">G02F1/05</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/0338" definition-exists="true" ipc-concordant="G02F1/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0338</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>structurally associated with a photoconductive layer or having photo-refractive properties </text><reference><text><class-ref scheme="cpc">G02F1/05</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/0344" definition-exists="false" ipc-concordant="G02F1/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0344</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>controlled by a high-frequency electromagnetic wave component in an electric waveguide </text><reference><text><class-ref scheme="cpc">G02F1/0356</class-ref>, <class-ref scheme="cpc">G02F1/05</class-ref>, <class-ref scheme="cpc">G02F1/2255</class-ref>, <class-ref scheme="cpc">G02F1/3134</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/035" definition-exists="false" ipc-concordant="G02F1/035" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/035</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in an optical waveguide structure</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/0353" definition-exists="false" ipc-concordant="G02F1/035" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0353</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving an electro-optic TE-TM mode conversion</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/0356" definition-exists="false" ipc-concordant="G02F1/035" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0356</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>controlled by a high-frequency electromagnetic wave component in an electric waveguide structure</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/05" definition-exists="true" ipc-concordant="G02F1/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-02-01" status="published"><classification-symbol>G02F1/05</classification-symbol><class-title date-revised="2020-02-01"><title-part><text>with ferro-electric properties </text><reference><text><class-ref scheme="cpc">G02F1/035</class-ref>, <class-ref scheme="cpc">G02F1/055</class-ref> take precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/0508" definition-exists="false" ipc-concordant="G02F1/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0508</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted for gating or modulating in optical waveguides</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/0516" definition-exists="false" ipc-concordant="G02F1/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0516</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Operation of the cell; Circuit arrangements</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/0525" definition-exists="true" ipc-concordant="G02F1/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0525</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>addressed by a beam of charged particles</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/0533" definition-exists="false" ipc-concordant="G02F1/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0533</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>structurally associated with a photo-conductive layer</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/0541" definition-exists="true" ipc-concordant="G02F1/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/0541</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>using photorefractive effects</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/055" definition-exists="true" ipc-concordant="G02F1/055" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/055</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the active material being a ceramic </text><reference><text><class-ref scheme="cpc">G02F1/035</class-ref> takes precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/0551" definition-exists="false" ipc-concordant="G02F1/055" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0551</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Constructional details</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/0553" definition-exists="false" ipc-concordant="G02F1/055" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0553</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted for gating or modulating in optical waveguides</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/0555" definition-exists="false" ipc-concordant="G02F1/055" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0555</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Operation of the cell; Circuit arrangements</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/0556" definition-exists="false" ipc-concordant="G02F1/055" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0556</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted for a particular application</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/0558" definition-exists="false" ipc-concordant="G02F1/055" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0558</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>structurally associated with a photoconductive layer or exhibiting photo-refractive properties</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/061" definition-exists="false" ipc-concordant="G02F1/061" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/061</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>based on electro-optical organic material </text><reference><text><class-ref scheme="cpc">G02F1/07</class-ref>, </text><CPC-specific-text><text><class-ref scheme="cpc">G02F1/13</class-ref></text></CPC-specific-text><text> take precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/065" definition-exists="false" ipc-concordant="G02F1/065" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in an optical waveguide structure</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/07" definition-exists="true" ipc-concordant="G02F1/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/07</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>based on electro-optical liquids exhibiting Kerr effect</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/073" definition-exists="false" ipc-concordant="G02F1/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/073</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted for gating or modulating in optical waveguides</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/076" definition-exists="false" ipc-concordant="G02F1/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/076</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Operation of the cell; Circuit arrangements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/09" definition-exists="true" ipc-concordant="G02F1/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/09</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>based on magneto-optical elements, e.g. exhibiting Faraday effect</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/091" definition-exists="false" ipc-concordant="G02F1/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/091</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on magneto-absorption or magneto-reflection</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/092" definition-exists="false" ipc-concordant="G02F1/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/092</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Operation of the cell; Circuit arrangements</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/093" definition-exists="false" ipc-concordant="G02F1/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/093</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>used as non-reciprocal devices, e.g. optical isolators, circulators </text><reference><text><class-ref scheme="cpc">G02F1/0955</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/094" definition-exists="false" ipc-concordant="G02F1/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/094</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>based on magnetophoretic effect</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/095" definition-exists="false" ipc-concordant="G02F1/095" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/095</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in an optical waveguide structure</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/0955" definition-exists="false" ipc-concordant="G02F1/095" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/0955</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>used as non-reciprocal devices, e.g. optical isolators, circulators</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/11" definition-exists="true" ipc-concordant="G02F1/11" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/11</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>based on acousto-optical elements, e.g. using variable diffraction by sound or like mechanical waves </text><reference><text>acousto-optical deflection <class-ref scheme="cpc">G02F1/33</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/113" definition-exists="false" ipc-concordant="G02F1/11" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/113</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuit or control arrangements</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/116" definition-exists="false" ipc-concordant="G02F1/11" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/116</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using an optically anisotropic medium, wherein the incident and the diffracted light waves have different polarizations, e.g. acousto-optic tunable filter [AOTF] </text><reference><text><class-ref scheme="cpc">G02F1/125</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/125" definition-exists="false" ipc-concordant="G02F1/125" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in an optical waveguide structure</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/13" definition-exists="true" ipc-concordant="G02F1/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-02-01" status="published"><classification-symbol>G02F1/13</classification-symbol><class-title date-revised="2020-02-01"><title-part><text>based on liquid crystals, e.g. single liquid crystal display cells</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/1303" definition-exists="false" ipc-concordant="G02F1/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/1303</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Apparatus specially adapted to the manufacture of LCDs</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/1306" definition-exists="false" ipc-concordant="G02F1/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G02F1/1306</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Details</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/1309" definition-exists="true" ipc-concordant="G02F1/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/1309</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Repairing; Testing</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/1313" definition-exists="true" ipc-concordant="G02F1/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/1313</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted for a particular application</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/1316" definition-exists="false" ipc-concordant="G02F1/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/1316</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Methods for cleaning the liquid crystal cells, or components thereof, during manufacture: Materials therefor</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/132" definition-exists="true" ipc-concordant="G02F1/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/132</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Thermal activation of liquid crystals exhibiting a thermo-optic effect</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/1323" definition-exists="false" ipc-concordant="G02F1/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/1323</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for providing a switchable viewing angle</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/1326" definition-exists="false" ipc-concordant="G02F1/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/1326</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Liquid crystal optical waveguides or liquid crystal cells specially adapted for gating or modulating between optical waveguides</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/133" definition-exists="true" ipc-concordant="G02F1/133" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Constructional arrangements</text></title-part><title-part><text>Operation of liquid crystal cells</text></title-part><title-part><text>Circuit arrangements </text><reference><text>arrangements or circuits for control of liquid crystal elements in a matrix, not structurally associated with these elements <class-ref scheme="cpc">G09G3/36</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/13306" definition-exists="false" ipc-concordant="G02F1/133" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/13306</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuit arrangements or driving methods for the control of single liquid crystal cells </text><reference><text><class-ref scheme="cpc">G02F1/132</class-ref>, <class-ref scheme="cpc">G02F1/133382</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/13312" definition-exists="false" ipc-concordant="G02F1/133" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13312</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Circuits comprising photodetectors for purposes other than feedback</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/13318" definition-exists="false" ipc-concordant="G02F1/133" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/13318</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits comprising a photodetector</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/13324" definition-exists="false" ipc-concordant="G02F1/133" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13324</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Circuits comprising solar cells</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/1333" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/1333</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Constructional arrangements; </text><CPC-specific-text><text>Manufacturing methods</text></CPC-specific-text><reference><text><class-ref scheme="cpc">G02F1/135</class-ref>, <class-ref scheme="cpc">G02F1/136</class-ref> take precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/133302" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133302</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Rigid substrates, e.g. inorganic substrates</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/133305" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/133305</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Flexible substrates, e.g. plastics, organic film</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/133308" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133308</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Support structures for LCD panels, e.g. frames or bezels</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133311" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133311</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Environmental protection, e.g. against dust or humidity</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133314" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133314</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Back frames</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133317" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133317</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Intermediate frames, e.g. between backlight housing and front frame</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/13332" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13332</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Front frames</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133322" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133322</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Mechanical guidance or alignment of LCD panel support components</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133325" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133325</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Assembling processes</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133328" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133328</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Segmented frames</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133331" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133331</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Cover glasses</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133334" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133334</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Electromagnetic shields</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/133337" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133337</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Layers preventing ion diffusion, e.g. by ion absorption</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/13334" definition-exists="true" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13334</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Plasma addressed liquid crystal cells [PALC]</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/133342" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133342</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>for double-sided displays</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/133345" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/133345</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Insulating layers </text><reference><text><class-ref scheme="cpc">G02F1/1335</class-ref>, <class-ref scheme="cpc">G02F1/1337</class-ref>, <class-ref scheme="cpc">G02F1/135</class-ref>, <class-ref scheme="cpc">G02F1/136</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/133348" definition-exists="true" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133348</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Charged particles addressed liquid crystal cells, e.g. controlled by an electron beam</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/133351" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/133351</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Manufacturing of individual cells out of a plurality of cells, e.g. by dicing</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/133354" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133354</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Arrangements for aligning or assembling substrates</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/133357" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133357</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Planarisation layers</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/13336" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/13336</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combining plural substrates to produce large-area displays, e.g. tiled displays</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/133362" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/133362</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optically addressed liquid crystal cells </text><reference><text><class-ref scheme="cpc">G02F1/135</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/133365" definition-exists="true" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133365</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Cells in which the active layer comprises a liquid crystalline polymer</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/133368" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133368</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Cells having two substrates with different characteristics, e.g. different thickness or material</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/133371" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/133371</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cells with varying thickness of the liquid crystal layer</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/133374" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133374</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>for displaying permanent signs or marks</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/133377" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G02F1/133377</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>Cells with plural compartments or having plurality of liquid crystal microcells partitioned by walls, e.g. one microcell per pixel</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/13338" definition-exists="true" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13338</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Input devices, e.g. touch panels</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/133382" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/133382</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133385" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/133385</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with cooling means, e.g. fans</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/133388" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133388</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>with constructional differences between the display region and the peripheral region</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/133391" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133391</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Constructional arrangement for sub-divided displays</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/133394" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133394</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Piezoelectric elements associated with the cells</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/133397" definition-exists="false" ipc-concordant="G02F1/1333" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133397</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>for suppressing after-image or image-sticking</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/1334" definition-exists="true" ipc-concordant="G02F1/1334" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/1334</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/13342" definition-exists="false" ipc-concordant="G02F1/1334" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/13342</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Holographic polymer dispersed liquid crystals</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/13345" definition-exists="false" ipc-concordant="G02F1/1334" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13345</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Network or three-dimensional gels</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/13347" definition-exists="false" ipc-concordant="G02F1/1334" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13347</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>working in reverse mode, i.e. clear in the off-state and scattering in the on-state</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/1335" definition-exists="true" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G02F1/1335</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>Structural association of cells with optical devices, e.g. polarisers or reflectors</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133502" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/133502</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Antiglare, refractive index matching layers</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133504" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>G02F1/133504</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Diffusing, scattering, diffracting elements </text><reference><text>associated to illuminating devices <class-ref scheme="cpc">G02F1/133606</class-ref></text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133507" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133507</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Films for enhancing the luminance</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133509" definition-exists="true" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133509</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Filters, e.g. light shielding masks</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133512" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/133512</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Light shielding layers, e.g. black matrix </text><reference><text><class-ref scheme="cpc">G02F1/136209</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133514" definition-exists="true" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133514</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Colour filters</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02F1/133516" definition-exists="true" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133516</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Methods for their manufacture, e.g. printing, electro-deposition or photolithography</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02F1/133519" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133519</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Overcoatings</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02F1/133521" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133521</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Interference filters</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133524" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/133524</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133526" definition-exists="true" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133526</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Lenses, e.g. microlenses or Fresnel lenses</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133528" definition-exists="true" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133528</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Polarisers</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133531" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133531</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>characterised by the arrangement of polariser or analyser axes</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133533" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/133533</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Colour selective polarisers </text><reference><text><class-ref scheme="cpc">G02F1/1347</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133536" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/133536</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reflective polarizers </text><reference><text><class-ref scheme="cpc">G02F1/13362</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133538" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133538</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>with spatial distribution of the polarisation direction</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133541" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133541</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Circular polarisers</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133543" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133543</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Cholesteric polarisers</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133545" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133545</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Dielectric stack polarisers</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133548" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133548</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Wire-grid polarisers</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/13355" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13355</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Polarising beam splitters [PBS]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133553" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>G02F1/133553</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reflecting elements </text><reference><text>associated to illuminating devices <class-ref scheme="cpc">G02F1/133605</class-ref></text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133555" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/133555</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transflectors</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02F1/133557" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133557</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Half-mirrors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/13356" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13356</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>characterised by the placement of the optical elements</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133562" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133562</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>on the viewer side</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133565" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133565</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>inside the LC elements, i.e. between the cell substrates</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133567" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133567</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>on the back side</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/1336" definition-exists="true" ipc-concordant="G02F1/13357" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/1336</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Illuminating devices</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133601" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133601</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>for spatial active dimming</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133602" definition-exists="true" ipc-concordant="G02F1/13357" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-02-01" status="published"><classification-symbol>G02F1/133602</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Direct backlight</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02F1/133603" definition-exists="false" ipc-concordant="G02F1/13357" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-02-01" status="published"><classification-symbol>G02F1/133603</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with LEDs</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02F1/133604" definition-exists="false" ipc-concordant="G02F1/13357" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-02-01" status="published"><classification-symbol>G02F1/133604</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with lamps</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02F1/133605" definition-exists="false" ipc-concordant="G02F1/13357" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-02-01" status="published"><classification-symbol>G02F1/133605</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including specially adapted reflectors</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02F1/133606" definition-exists="false" ipc-concordant="G02F1/13357" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-02-01" status="published"><classification-symbol>G02F1/133606</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including a specially adapted diffusing, scattering or light controlling members</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="16" additional-only="false" sort-key="G02F1/133607" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133607</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>the light controlling member including light directing or refracting elements, e.g. prisms or lenses</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02F1/133608" definition-exists="false" ipc-concordant="G02F1/13357" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-02-01" status="published"><classification-symbol>G02F1/133608</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including particular frames or supporting means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02F1/133609" definition-exists="false" ipc-concordant="G02F1/13357" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-02-01" status="published"><classification-symbol>G02F1/133609</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including means for improving the color mixing, e.g. white</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02F1/133611" definition-exists="false" ipc-concordant="G02F1/13357" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-02-01" status="published"><classification-symbol>G02F1/133611</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including means for improving the brightness uniformity</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02F1/133612" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133612</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Electrical details</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02F1/133613" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133613</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>characterized by the sequence of light sources</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133614" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133614</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>using photoluminescence, e.g. phosphors illuminated by UV or blue light</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133615" definition-exists="true" ipc-concordant="G02F1/13357" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/133615</classification-symbol><class-title date-revised="2022-01-01"><title-part><CPC-specific-text><text>Edge-illuminating devices, i.e. illuminating from the side</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133616" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133616</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Front illuminating devices</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133617" definition-exists="false" ipc-concordant="G02F1/13357" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-02-01" status="published"><classification-symbol>G02F1/133617</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Illumination with ultra-violet light; Luminescent elements or materials associated to the cell</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133618" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133618</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>for ambient light</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/13362" definition-exists="true" ipc-concordant="G02F1/13357" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13362</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>providing polarized light, e.g. by converting a polarisation component into another one</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133621" definition-exists="false" ipc-concordant="G02F1/13357" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-02-01" status="published"><classification-symbol>G02F1/133621</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>providing coloured light </text><reference><text><class-ref scheme="cpc">G02F1/133617</class-ref>, <class-ref scheme="cpc">G02F1/133533</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02F1/133622" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133622</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Colour sequential illumination</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02F1/133623" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133623</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Inclined coloured light beams</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133624" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133624</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>characterised by their spectral emissions</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133625" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133625</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Electron stream lamps</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133626" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133626</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>providing two modes of illumination, e.g. day-night</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02F1/133627" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133627</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Projection-direct viewing</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133628" definition-exists="false" ipc-concordant="G02F1/1335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133628</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>with cooling means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/13363" definition-exists="false" ipc-concordant="G02F1/13363" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/13363</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Birefringent elements, e.g. for optical compensation</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133631" definition-exists="false" ipc-concordant="G02F1/13363" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133631</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>with a spatial distribution of the retardation value</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133632" definition-exists="false" ipc-concordant="G02F1/13363" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/133632</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with refractive index ellipsoid inclined relative to the LC-layer surface</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133633" definition-exists="false" ipc-concordant="G02F1/13363" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133633</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>using mesogenic materials</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133634" definition-exists="false" ipc-concordant="G02F1/13363" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/133634</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the refractive index Nz perpendicular to the element surface being different from in-plane refractive indices Nx and Ny, e.g. biaxial or with normal optical axis</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133635" definition-exists="false" ipc-concordant="G02F1/13363" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133635</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Multifunctional compensators</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133636" definition-exists="false" ipc-concordant="G02F1/13363" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/133636</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with twisted orientation, e.g. comprising helically oriented LC-molecules or a plurality of twisted birefringent sublayers</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133637" definition-exists="false" ipc-concordant="G02F1/13363" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133637</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>characterised by the wavelength dispersion</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133638" definition-exists="false" ipc-concordant="G02F1/13363" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133638</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Waveplates, i.e. plates with a retardation value of lambda/n</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/1337" definition-exists="false" ipc-concordant="G02F1/1337" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/1337</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133703" definition-exists="false" ipc-concordant="G02F1/1337" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/133703</classification-symbol><class-title date-revised="2022-01-01"><title-part><CPC-specific-text><text>by introducing organic surfactant additives into the liquid crystal material</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133707" definition-exists="false" ipc-concordant="G02F1/1337" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/133707</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133711" definition-exists="false" ipc-concordant="G02F1/1337" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/133711</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by organic films, e.g. polymeric films</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133715" definition-exists="false" ipc-concordant="G02F1/1337" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133715</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>by first depositing a monomer</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133719" definition-exists="false" ipc-concordant="G02F1/1337" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/133719</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with coupling agent molecules, e.g. silane</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133723" definition-exists="false" ipc-concordant="G02F1/1337" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/133723</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Polyimide, polyamide-imide</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133726" definition-exists="false" ipc-concordant="G02F1/1337" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133726</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>made of a mesogenic material</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/13373" definition-exists="false" ipc-concordant="G02F1/1337" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13373</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Disclination line; Reverse tilt</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133734" definition-exists="false" ipc-concordant="G02F1/1337" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/133734</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by obliquely evaporated films, e.g. Si or SiO<sub>2</sub> films</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133738" definition-exists="false" ipc-concordant="G02F1/1337" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133738</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>for homogeneous alignment</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133742" definition-exists="false" ipc-concordant="G02F1/1337" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133742</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>for homeotropic alignment</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133746" definition-exists="false" ipc-concordant="G02F1/1337" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133746</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>for high pretilt angles, i.e. higher than 15 degrees</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133749" definition-exists="false" ipc-concordant="G02F1/1337" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133749</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>for low pretilt angles, i.e. lower than 15 degrees</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133753" definition-exists="false" ipc-concordant="G02F1/1337" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/133753</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133757" definition-exists="false" ipc-concordant="G02F1/1337" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133757</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>with different alignment orientations</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133761" definition-exists="false" ipc-concordant="G02F1/1337" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133761</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>with different pretilt angles</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133765" definition-exists="false" ipc-concordant="G02F1/1337" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133765</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>without a surface treatment</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133769" definition-exists="false" ipc-concordant="G02F1/1337" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133769</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>comprising an active, e.g. switchable, alignment layer</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133773" definition-exists="false" ipc-concordant="G02F1/1337" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133773</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>the alignment material or treatment being different for the two opposite substrates</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133776" definition-exists="false" ipc-concordant="G02F1/1337" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133776</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>having structures locally influencing the alignment, e.g. unevenness</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/13378" definition-exists="false" ipc-concordant="G02F1/1337" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13378</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>by treatment of the surface, e.g. embossing, rubbing or light irradiation </text><reference><text><class-ref scheme="cpc">G02F1/133711</class-ref>, <class-ref scheme="cpc">G02F1/133734</class-ref>, <class-ref scheme="cpc">G02F1/133753</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133784" definition-exists="false" ipc-concordant="G02F1/1337" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/133784</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by rubbing</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133788" definition-exists="false" ipc-concordant="G02F1/1337" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/133788</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by light irradiation, e.g. linearly polarised light photo-polymerisation</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/133792" definition-exists="false" ipc-concordant="G02F1/1337" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133792</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>by etching</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/133796" definition-exists="false" ipc-concordant="G02F1/1337" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/133796</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>having conducting property</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/1339" definition-exists="false" ipc-concordant="G02F1/1339" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G02F1/1339</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>Gaskets</text></title-part><title-part><text>Spacers</text></title-part><title-part><text>Sealing of cells</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/13392" definition-exists="false" ipc-concordant="G02F1/1339" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G02F1/13392</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>spacers dispersed on the cell substrate, e.g. spherical particles, microfibres</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/13394" definition-exists="false" ipc-concordant="G02F1/1339" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/13394</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>spacers regularly patterned on the cell subtrate, e.g. walls, pillars </text><reference><text><class-ref scheme="cpc">G02F1/133377</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/13396" definition-exists="false" ipc-concordant="G02F1/1339" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13396</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Spacers having different sizes</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/13398" definition-exists="false" ipc-concordant="G02F1/1339" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13398</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Spacer materials; Spacer properties</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/1341" definition-exists="false" ipc-concordant="G02F1/1341" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G02F1/1341</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>Filling or closing of cells</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/13415" definition-exists="false" ipc-concordant="G02F1/1341" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13415</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Drop filling process</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/1343" definition-exists="false" ipc-concordant="G02F1/1343" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/1343</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrodes </text><CPC-specific-text><reference><text>reflective electrodes <class-ref scheme="cpc">G02F1/133553</class-ref></text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/134309" definition-exists="true" ipc-concordant="G02F1/1343" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/134309</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>characterised by their geometrical arrangement</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/134318" definition-exists="false" ipc-concordant="G02F1/1343" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/134318</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>having a patterned common electrode</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/134327" definition-exists="false" ipc-concordant="G02F1/1343" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/134327</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Segmented, e.g. alpha numeric display</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/134336" definition-exists="false" ipc-concordant="G02F1/1343" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/134336</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Matrix</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/134345" definition-exists="false" ipc-concordant="G02F1/1343" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/134345</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Subdivided pixels, e.g. for grey scale or redundancy</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02F1/134354" definition-exists="false" ipc-concordant="G02F1/1343" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/134354</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>the sub-pixels being capacitively coupled</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/134363" definition-exists="false" ipc-concordant="G02F1/1343" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/134363</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/134372" definition-exists="false" ipc-concordant="G02F1/1343" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/134372</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>for fringe field switching [FFS] where the common electrode is not patterned</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/134381" definition-exists="false" ipc-concordant="G02F1/1343" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/134381</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Hybrid switching mode, i.e. for applying an electric field with components parallel and orthogonal to the substrates</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/13439" definition-exists="false" ipc-concordant="G02F1/1343" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/13439</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by their electrical, optical, physical properties; materials therefor; method of making</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/1345" definition-exists="true" ipc-concordant="G02F1/1345" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/1345</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Conductors connecting electrodes to cell terminals</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/13452" definition-exists="true" ipc-concordant="G02F1/1345" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/13452</classification-symbol><class-title date-revised="2022-01-01"><title-part><CPC-specific-text><text>Conductors connecting driver circuitry and terminals of panels</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/13454" definition-exists="false" ipc-concordant="G02F1/1345" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/13454</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Drivers integrated on the active matrix substrate </text><reference><text><class-ref scheme="cpc">G02F1/136277</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/13456" definition-exists="false" ipc-concordant="G02F1/1345" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13456</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Cell terminals located on one side of the display only</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/13458" definition-exists="false" ipc-concordant="G02F1/1345" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/13458</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Terminal pads</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/1347" definition-exists="true" ipc-concordant="G02F1/1347" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-02-01" status="published"><classification-symbol>G02F1/1347</classification-symbol><class-title date-revised="2020-02-01"><title-part><text>Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/13471" definition-exists="false" ipc-concordant="G02F1/1347" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/13471</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells </text><reference><text><class-ref scheme="cpc">G02F1/13475</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/13473" definition-exists="false" ipc-concordant="G02F1/1347" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/13473</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for wavelength filtering or for colour display without the use of colour mosaic filters</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/13475" definition-exists="false" ipc-concordant="G02F1/1347" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/13475</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which at least one liquid crystal cell or layer is doped with a pleochroic dye, e.g. GH-LC cell </text><reference><text><class-ref scheme="cpc">G02F1/13476</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/13476" definition-exists="false" ipc-concordant="G02F1/1347" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/13476</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which at least one liquid crystal cell or layer assumes a scattering state</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/13478" definition-exists="false" ipc-concordant="G02F1/1347" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13478</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>based on selective reflection</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/135" definition-exists="false" ipc-concordant="G02F1/135" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/135</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Liquid crystal cells structurally associated with a photoconducting or a ferro-electric layer, the properties of which can be optically or electrically varied </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G02F1/133348</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/1351" definition-exists="false" ipc-concordant="G02F1/135" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/1351</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Light-absorbing or blocking layers</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/1352" definition-exists="false" ipc-concordant="G02F1/135" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/1352</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Light-reflecting layers</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/1354" definition-exists="false" ipc-concordant="G02F1/135" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/1354</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having a particular photoconducting structure or material</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/1355" definition-exists="false" ipc-concordant="G02F1/135" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/1355</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Materials or manufacture processes thereof</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/1357" definition-exists="false" ipc-concordant="G02F1/135" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/1357</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Electrode structure</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/1358" definition-exists="false" ipc-concordant="G02F1/135" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/1358</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the supplementary layer being a ferro-electric layer</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/136" definition-exists="false" ipc-concordant="G02F1/136" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/136</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit </text><reference><text><class-ref scheme="cpc">G02F1/135</class-ref> takes precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/13606" definition-exists="false" ipc-concordant="G02F1/136" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13606</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>having means for reducing parasitic capacitance</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/13613" definition-exists="false" ipc-concordant="G02F1/136" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13613</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>the semiconductor element being formed on a first substrate and thereafter transferred to the final cell substrate</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/1362" definition-exists="false" ipc-concordant="G02F1/1362" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/1362</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Active matrix addressed cells </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G02F1/134336</class-ref>, <class-ref scheme="cpc">G02F1/134363</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/136204" definition-exists="false" ipc-concordant="G02F1/1362" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/136204</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements to prevent high voltage or static electricity failures</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/136209" definition-exists="false" ipc-concordant="G02F1/1362" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/136209</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/136213" definition-exists="false" ipc-concordant="G02F1/1362" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/136213</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Storage capacitors associated with the pixel electrode</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/136218" definition-exists="false" ipc-concordant="G02F1/1362" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/136218</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Shield electrodes</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/136222" definition-exists="false" ipc-concordant="G02F1/1362" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/136222</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Colour filters incorporated in the active matrix substrate</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/136227" definition-exists="false" ipc-concordant="G02F1/1362" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/136227</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Through-hole connection of the pixel electrode to the active element through an insulation layer</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/136231" definition-exists="false" ipc-concordant="G02F1/1362" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/136231</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>for reducing the number of lithographic steps</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/136236" definition-exists="false" ipc-concordant="G02F1/1362" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/136236</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>using a grey or half tone lithographic process</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/13624" definition-exists="false" ipc-concordant="G02F1/1362" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/13624</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having more than one switching element per pixel</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/136245" definition-exists="false" ipc-concordant="G02F1/1362" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/136245</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>having complementary transistors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/13625" definition-exists="false" ipc-concordant="G02F1/1362" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13625</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Patterning using multi-mask exposure</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/136254" definition-exists="false" ipc-concordant="G02F1/1362" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/136254</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Checking; Testing</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/136259" definition-exists="false" ipc-concordant="G02F1/1362" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/136259</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Repairing; Defects</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/136263" definition-exists="false" ipc-concordant="G02F1/1362" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/136263</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Line defects</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/136268" definition-exists="false" ipc-concordant="G02F1/1362" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/136268</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Switch defects</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/136272" definition-exists="false" ipc-concordant="G02F1/1362" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/136272</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Auxiliary lines</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/136277" definition-exists="false" ipc-concordant="G02F1/1362" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/136277</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>formed on a semiconductor substrate, e.g. of silicon</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/136281" definition-exists="false" ipc-concordant="G02F1/1362" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/136281</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>having a transmissive semiconductor substrate</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/136286" definition-exists="false" ipc-concordant="G02F1/1362" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/136286</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Wiring, e.g. gate line, drain line</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/13629" definition-exists="false" ipc-concordant="G02F1/1362" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13629</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Multilayer wirings</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/136295" definition-exists="false" ipc-concordant="G02F1/1362" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/136295</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Materials; Compositions; Manufacture processes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/1365" definition-exists="false" ipc-concordant="G02F1/1365" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/1365</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which the switching element is a two-electrode device </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G02F1/136277</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/1368" definition-exists="false" ipc-concordant="G02F1/1368" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/1368</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which the switching element is a three-electrode device </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G02F1/136277</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02F1/13685" definition-exists="false" ipc-concordant="G02F1/1368" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13685</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Top gates</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/137" definition-exists="false" ipc-concordant="G02F1/137" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G02F1/137</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/13706" definition-exists="false" ipc-concordant="G02F1/137" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13706</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>the liquid crystal having positive dielectric anisotropy</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/13712" definition-exists="false" ipc-concordant="G02F1/137" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13712</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>the liquid crystal having negative dielectric anisotropy</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/13718" definition-exists="false" ipc-concordant="G02F1/137" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/13718</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on a change of the texture state of a cholesteric liquid crystal</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/13725" definition-exists="false" ipc-concordant="G02F1/137" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/13725</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on guest-host interaction </text><reference><text><class-ref scheme="cpc">G02F1/13762</class-ref>, <class-ref scheme="cpc">G02F1/13737</class-ref>, take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/13731" definition-exists="false" ipc-concordant="G02F1/137" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/13731</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on a field-induced phase transition </text><reference><text><class-ref scheme="cpc">G02F1/13781</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/13737" definition-exists="false" ipc-concordant="G02F1/137" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/13737</classification-symbol><class-title date-revised="2022-01-01"><title-part><CPC-specific-text><text>in liquid crystals doped with a pleochroic dye</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/13743" definition-exists="false" ipc-concordant="G02F1/137" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/13743</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on electrohydrodynamic instabilities or domain formation in liquid crystals</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/1375" definition-exists="false" ipc-concordant="G02F1/137" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/1375</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using dynamic scattering</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/13756" definition-exists="false" ipc-concordant="G02F1/137" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13756</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>the liquid crystal selectively assuming a light-scattering state </text><reference><text><class-ref scheme="cpc">G02F1/1334</class-ref>,&#160;<class-ref scheme="cpc">G02F1/13718</class-ref>&#160;take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/13762" definition-exists="true" ipc-concordant="G02F1/137" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13762</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>containing luminescent or electroluminescent additives</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/13768" definition-exists="false" ipc-concordant="G02F1/137" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/13768</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on magneto-optical effects</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/13775" definition-exists="false" ipc-concordant="G02F1/137" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13775</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Polymer-stabilized liquid crystal layers</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/13781" definition-exists="false" ipc-concordant="G02F1/137" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/13781</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using smectic liquid crystals </text><reference><text><class-ref scheme="cpc">G02F1/141</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/13787" definition-exists="false" ipc-concordant="G02F1/137" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13787</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Hybrid-alignment cells </text><reference><text><class-ref scheme="cpc">G02F1/1393</class-ref>&#160;takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/13793" definition-exists="false" ipc-concordant="G02F1/137" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/13793</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Blue phases</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/139" definition-exists="false" ipc-concordant="G02F1/139" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/139</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>based on orientation effects in which the liquid crystal remains transparent</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/1391" definition-exists="false" ipc-concordant="G02F1/139" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/1391</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bistable or multi-stable liquid crystal cells </text><reference><text><class-ref scheme="cpc">G02F1/141</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/1392" definition-exists="false" ipc-concordant="G02F1/139" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/1392</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a field-induced sign-reversal of the dielectric anisotropy</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/1393" definition-exists="false" ipc-concordant="G02F1/139" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/1393</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the birefringence of the liquid crystal being electrically controlled, e.g. ECB-, DAP-, HAN-, PI-LC cells </text><reference><text><class-ref scheme="cpc">G02F1/1396</class-ref>, <class-ref scheme="cpc">G02F1/141</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/1395" definition-exists="false" ipc-concordant="G02F1/139" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/1395</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optically compensated birefringence [OCB]- cells or PI- cells</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/1396" definition-exists="false" ipc-concordant="G02F1/139" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/1396</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the liquid crystal being selectively controlled between a twisted state and a non-twisted state, e.g. TN-LC cell </text><reference><text><class-ref scheme="cpc">G02F1/141</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/1397" definition-exists="false" ipc-concordant="G02F1/139" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/1397</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the twist being substantially higher than 90&#176;, e.g. STN-, SBE-, OMI-LC cells</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/1398" definition-exists="false" ipc-concordant="G02F1/139" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/1398</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>the twist being below 90&#176;</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/141" definition-exists="false" ipc-concordant="G02F1/141" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/141</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using ferroelectric liquid crystals</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/1412" definition-exists="false" ipc-concordant="G02F1/141" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/1412</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Antiferroelectric liquid crystals</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/1414" definition-exists="false" ipc-concordant="G02F1/141" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/1414</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Deformed helix ferroelectric [DHL]</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/1416" definition-exists="false" ipc-concordant="G02F1/141" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/1416</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of the smectic layer structure, e.g. bookshelf, chevron, C1 and C2</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/1418" definition-exists="false" ipc-concordant="G02F1/141" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/1418</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using smectic liquid crystals, e.g. based on the electroclinic effect</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/15" definition-exists="true" ipc-concordant="G02F1/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/15</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>based on an electrochromic effect</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02F1/1502" definition-exists="false" ipc-concordant="G02F1/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2001/1502</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>complementary cell</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02F1/15025" definition-exists="false" ipc-concordant="G02F1/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G02F2001/15025</classification-symbol><class-title date-revised="2019-01-01"><title-part><CPC-specific-text><text>having an inorganic electrochromic layer and a second solid organic electrochromic layer</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/1503" definition-exists="false" ipc-concordant="G02F1/1503" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G02F1/1503</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>caused by oxidation-reduction reactions in organic liquid solutions, e.g. viologen solutions</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/1506" definition-exists="true" ipc-concordant="G02F1/1506" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G02F1/1506</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>caused by electrodeposition, e.g. electrolytic deposition of an inorganic material on or close to an electrode</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/1508" definition-exists="false" ipc-concordant="G02F1/1506" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/1508</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a solid electrolyte</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/1514" definition-exists="true" ipc-concordant="G02F1/1514" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/1514</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>characterised by the electrochromic material, e.g. by the electrodeposited material</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02F1/15145" definition-exists="false" ipc-concordant="G02F1/1514" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G02F2001/15145</classification-symbol><class-title date-revised="2019-01-01"><title-part><CPC-specific-text><text>the electrochromic layer comprises a mixture of anodic and cathodic compounds</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/1516" definition-exists="false" ipc-concordant="G02F1/1516" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/1516</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>comprising organic material</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/15165" definition-exists="false" ipc-concordant="G02F1/1516" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G02F1/15165</classification-symbol><class-title date-revised="2019-01-01"><title-part><CPC-specific-text><text>Polymers</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G02F1/1517" definition-exists="false" ipc-concordant="G02F1/1516" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G02F2001/1517</classification-symbol><class-title date-revised="2019-01-01"><title-part><CPC-specific-text><text>Cyano complex compounds, e.g. Prussian blue</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G02F1/1518" definition-exists="false" ipc-concordant="G02F1/1516" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G02F2001/1518</classification-symbol><class-title date-revised="2019-01-01"><title-part><CPC-specific-text><text>Ferrocene compounds</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/1523" definition-exists="false" ipc-concordant="G02F1/1523" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/1523</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>comprising inorganic material</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/1524" definition-exists="false" ipc-concordant="G02F1/1524" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/1524</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>Transition metal compounds</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02F1/15245" definition-exists="false" ipc-concordant="G02F1/1524" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G02F1/15245</classification-symbol><class-title date-revised="2019-01-01"><title-part><CPC-specific-text><text>based on iridium oxide or hydroxide</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/1525" definition-exists="false" ipc-concordant="G02F1/1523" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G02F1/1525</classification-symbol><class-title date-revised="2019-01-01"><title-part><CPC-specific-text><text>characterised by a particular ion transporting layer, e.g. electrolyte</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/153" definition-exists="false" ipc-concordant="G02F1/153" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G02F1/153</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>Constructional details</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/1533" definition-exists="false" ipc-concordant="G02F1/153" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/1533</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>structural features not otherwise provided for</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G02F1/1536" definition-exists="false" ipc-concordant="G02F1/153" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2001/1536</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>additional, e.g. protective, layer inside the cell</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/155" definition-exists="false" ipc-concordant="G02F1/155" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/155</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrodes</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G02F1/1552" definition-exists="false" ipc-concordant="G02F1/155" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2001/1552</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Inner electrode, e.g. the electrochromic layer being sandwiched between the inner electrode and the support substrate---- this group, now to be changed, should already been created by implementation of a previous DOC14 </text><reference><text>prior to the one referred to above</text></reference><text>----</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G02F1/1555" definition-exists="false" ipc-concordant="G02F1/155" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2001/1555</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Counter electrode</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G02F1/1557" definition-exists="false" ipc-concordant="G02F1/155" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2001/1557</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Side by side arrangements of working and counter electrodes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/157" definition-exists="false" ipc-concordant="G02F1/157" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G02F1/157</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>Structural association of cells with optical devices, e.g. reflectors or illuminating devices</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/161" definition-exists="false" ipc-concordant="G02F1/161" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G02F1/161</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>Gaskets</text></title-part><title-part><text>Spacers</text></title-part><title-part><text>Sealing of cells</text></title-part><title-part><text>Filling or closing of cells</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/163" definition-exists="false" ipc-concordant="G02F1/163" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G02F1/163</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>Operation of electrochromic cells, e.g. electrodeposition cells</text></title-part><title-part><text>Circuit arrangements therefor</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02F1/1635" definition-exists="false" ipc-concordant="G02F1/163" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2001/1635</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the pixel comprises active switching elements, e.g. TFT</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02F1/164" definition-exists="false" ipc-concordant="G02F1/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G02F2001/164</classification-symbol><class-title date-revised="2019-01-01"><title-part><CPC-specific-text><text>the electrolyte is made of polymers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/165" definition-exists="false" ipc-concordant="G02F1/165" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/165</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>based on translational movement of particles in a fluid under the influence of an applied field</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/166" definition-exists="false" ipc-concordant="G02F1/166" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/166</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>characterised by the electro-optical or magneto-optical effect</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/167" definition-exists="true" ipc-concordant="G02F1/167" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/167</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>by electrophoresis</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/1671" definition-exists="false" ipc-concordant="G02F1/1671" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G02F1/1671</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>involving dry toners</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/1673" definition-exists="false" ipc-concordant="G02F1/1673" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/1673</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>by magnetophoresis</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/1675" definition-exists="false" ipc-concordant="G02F1/1675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/1675</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>Constructional details</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/16753" definition-exists="false" ipc-concordant="G02F1/16753" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/16753</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>Structures for supporting or mounting cells, e.g. frames or bezels</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/16755" definition-exists="false" ipc-concordant="G02F1/16755" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/16755</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>Substrates</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/16756" definition-exists="false" ipc-concordant="G02F1/16756" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/16756</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>Insulating layers</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/16757" definition-exists="false" ipc-concordant="G02F1/16757" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/16757</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>Microcapsules</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/1676" definition-exists="false" ipc-concordant="G02F1/1676" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/1676</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>Electrodes</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/16761" definition-exists="false" ipc-concordant="G02F1/16761" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/16761</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>Side-by-side arrangement of working electrodes and counter-electrodes</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/16762" definition-exists="false" ipc-concordant="G02F1/16762" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/16762</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>having three or more electrodes per pixel</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/16766" definition-exists="false" ipc-concordant="G02F1/16766" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/16766</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>for active matrices</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/1677" definition-exists="false" ipc-concordant="G02F1/1677" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/1677</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>Structural association of cells with optical devices, e.g. reflectors or illuminating devices</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02F1/1678" definition-exists="false" ipc-concordant="G02F1/1675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G02F2001/1678</classification-symbol><class-title date-revised="2019-01-01"><title-part><CPC-specific-text><text>characterised by the composition or particle type</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/1679" definition-exists="false" ipc-concordant="G02F1/1679" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/1679</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>Gaskets</text></title-part><title-part><text>Spacers</text></title-part><title-part><text>Sealing of cells</text></title-part><title-part><text>Filling or closing of cells</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/1681" definition-exists="false" ipc-concordant="G02F1/1681" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>G02F1/1681</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>having two or more microcells partitioned by walls, e.g. of microcup type</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/1685" definition-exists="false" ipc-concordant="G02F1/1685" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/1685</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>Operation of cells</text></title-part><title-part><text>Circuit arrangements affecting the entire cell</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/169" definition-exists="false" ipc-concordant="G02F1/169" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/169</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>based on orientable non-spherical particles having a common optical characteristic, e.g. suspended particles of reflective metal flakes</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/17" definition-exists="true" ipc-concordant="G02F1/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/17</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>based on variable-absorption elements not provided for in groups <class-ref scheme="cpc">G02F1/015</class-ref> - <class-ref scheme="cpc">G02F1/169</class-ref></text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/172" definition-exists="true" ipc-concordant="G02F1/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/172</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on a suspension of orientable dipolar particles, e.g. suspended particles displays</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/174" definition-exists="false" ipc-concordant="G02F1/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/174</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on absorption band-shift, e.g. Stark - or Franz-Keldysh effect </text><reference><text><class-ref scheme="cpc">G02F1/015</class-ref>, <class-ref scheme="cpc">G02F1/178</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/176" definition-exists="false" ipc-concordant="G02F1/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/176</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using acid- based indicators</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/178" definition-exists="false" ipc-concordant="G02F1/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/178</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on pressure effects </text><reference><text><class-ref scheme="cpc">G02F1/195</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/19" definition-exists="true" ipc-concordant="G02F1/19" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/19</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>based on variable-reflection or variable-refraction elements not provided for in groups <class-ref scheme="cpc">G02F1/015</class-ref> - <class-ref scheme="cpc">G02F1/169</class-ref></text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/195" definition-exists="false" ipc-concordant="G02F1/19" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/195</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using frustrated reflection </text><reference><text>digital reflection using controlled total internal reflection <class-ref scheme="cpc">G02F1/315</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/21" definition-exists="false" ipc-concordant="G02F1/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/21</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by interference</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/211" definition-exists="false" ipc-concordant="G02F1/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/211</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Sagnac type</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/212" definition-exists="false" ipc-concordant="G02F1/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/212</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Mach-Zehnder type</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/218" definition-exists="false" ipc-concordant="G02F1/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/218</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using semi-conducting materials</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/225" definition-exists="false" ipc-concordant="G02F1/225" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/225</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in an optical waveguide structure</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/2252" definition-exists="false" ipc-concordant="G02F1/225" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/2252</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in optical fibres</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/25" definition-exists="false" ipc-concordant="G02F1/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/25</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>as to hue or predominant wavelength</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/294" definition-exists="false" ipc-concordant="G02F1/29" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/294</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Variable focal length devices</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/311" definition-exists="false" ipc-concordant="G02F1/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/311</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Cascade arrangement of plural switches</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/3135" definition-exists="false" ipc-concordant="G02F1/313" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/3135</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Vertical structure</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/3136" definition-exists="false" ipc-concordant="G02F1/313" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3136</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of interferometric switch type</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/3137" definition-exists="false" ipc-concordant="G02F1/313" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3137</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with intersecting or branching waveguides, e.g. X-switches and Y-junctions</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/3138" definition-exists="false" ipc-concordant="G02F1/313" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3138</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the optical waveguides being made of semiconducting materials</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/315" definition-exists="false" ipc-concordant="G02F1/315" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/315</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>based on the use of controlled internal reflection</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/332" definition-exists="false" ipc-concordant="G02F1/33" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/332</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising a plurality of transducers on the same crystal surface, e.g. multi-channel Bragg cell</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/335" definition-exists="false" ipc-concordant="G02F1/335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/335</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having an optical waveguide structure</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/3503" definition-exists="false" ipc-concordant="G02F1/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/3503</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Structural association of optical elements, e.g. lenses, with the non-linear optical device</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/3507" definition-exists="false" ipc-concordant="G02F1/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/3507</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Arrangements comprising two or more nonlinear optical devices</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/3511" definition-exists="true" ipc-concordant="G02F1/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/3511</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Self-focusing or self-trapping of light; Light-induced birefringence; Induced optical Kerr-effect</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/3513" definition-exists="false" ipc-concordant="G02F1/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3513</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Soliton propagation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/3515" definition-exists="false" ipc-concordant="G02F1/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3515</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>All-optical modulation, gating, switching, e.g. control of a light beam by another light beam </text><reference><text><class-ref scheme="cpc">G02F1/353</class-ref>, <class-ref scheme="cpc">G02F1/37</class-ref>, <class-ref scheme="cpc">G02F1/39</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/3517" definition-exists="false" ipc-concordant="G02F1/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3517</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using an interferometer</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/3519" definition-exists="false" ipc-concordant="G02F1/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3519</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of Sagnac type, i.e. nonlinear optical loop mirror [NOLM]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/3521" definition-exists="false" ipc-concordant="G02F1/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3521</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a directional coupler</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/3523" definition-exists="true" ipc-concordant="G02F1/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/3523</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Non-linear absorption changing by light, e.g. bleaching</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/3525" definition-exists="false" ipc-concordant="G02F1/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3525</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optical damage</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/3526" definition-exists="true" ipc-concordant="G02F1/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/3526</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>using two-photon emission or absorption processes</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/3528" definition-exists="false" ipc-concordant="G02F1/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/3528</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>for producing a supercontinuum</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/353" definition-exists="true" ipc-concordant="G02F1/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/353</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Frequency conversion, i.e. wherein a light beam is generated with frequency components different from those of the incident light beams</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/3532" definition-exists="false" ipc-concordant="G02F1/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3532</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements of plural nonlinear devices for generating multi-colour light beams, e.g. arrangements of SHG, SFG, OPO devices for generating RGB light beams</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/3534" definition-exists="false" ipc-concordant="G02F1/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3534</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Three-wave interaction, e.g. sum-difference frequency generation </text><reference><text><class-ref scheme="cpc">G02F1/3532</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/3536" definition-exists="false" ipc-concordant="G02F1/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3536</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Four-wave interaction</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/3538" definition-exists="false" ipc-concordant="G02F1/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02F1/3538</classification-symbol><class-title date-revised="2022-01-01"><title-part><CPC-specific-text><text>for optical phase conjugation </text><reference><text>controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation using optical phase conjugation <class-ref scheme="cpc">H01S3/10076</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/354" definition-exists="false" ipc-concordant="G02F1/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/354</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Third or higher harmonic generation</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/3542" definition-exists="false" ipc-concordant="G02F1/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/3542</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Multipass arrangements, i.e. arrangements to make light pass multiple times through the same element, e.g. using an enhancement cavity</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/3544" definition-exists="false" ipc-concordant="G02F1/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3544</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Particular phase matching techniques</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/3546" definition-exists="false" ipc-concordant="G02F1/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/3546</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Active phase matching, e.g. by electro- or thermo-optic tuning</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/3548" definition-exists="false" ipc-concordant="G02F1/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/3548</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Quasi phase matching [QPM], e.g. using a periodic domain inverted structure</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/355" definition-exists="false" ipc-concordant="G02F1/355" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/355</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the materials used</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/3551" definition-exists="false" ipc-concordant="G02F1/355" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3551</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Crystals</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/3553" definition-exists="false" ipc-concordant="G02F1/355" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3553</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having the formula MTiOYO4, where M=K, Rb, TI, NH4 or Cs and Y=P or As, e.g. KTP</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/3555" definition-exists="false" ipc-concordant="G02F1/355" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3555</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Glasses</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/3556" definition-exists="false" ipc-concordant="G02F1/355" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3556</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Semiconductor materials, e.g. quantum wells</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/3558" definition-exists="false" ipc-concordant="G02F1/355" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3558</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Poled materials, e.g. with periodic poling; Fabrication of domain inverted structures, e.g. for quasi-phase-matching [QPM]</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/361" definition-exists="false" ipc-concordant="G02F1/361" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/361</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Organic materials</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/3611" definition-exists="false" ipc-concordant="G02F1/361" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3611</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing Nitrogen</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/3612" definition-exists="false" ipc-concordant="G02F1/361" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3612</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Heterocycles having N as heteroatom</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/3613" definition-exists="false" ipc-concordant="G02F1/361" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3613</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing Sulfur</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/3614" definition-exists="false" ipc-concordant="G02F1/361" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3614</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Heterocycles having S as heteroatom</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/3615" definition-exists="false" ipc-concordant="G02F1/361" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3615</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing polymers</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/3616" definition-exists="false" ipc-concordant="G02F1/361" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3616</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having the non-linear optical group in the main chain</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02F1/3617" definition-exists="false" ipc-concordant="G02F1/361" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3617</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having the non-linear optical group in a side chain</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/3618" definition-exists="false" ipc-concordant="G02F1/361" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3618</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Langmuir Blodgett Films</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/3619" definition-exists="false" ipc-concordant="G02F1/361" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3619</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Organometallic compounds</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/365" definition-exists="false" ipc-concordant="G02F1/365" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/365</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in an optical waveguide structure </text><reference><text><class-ref scheme="cpc">G02F1/377</class-ref>, </text><CPC-specific-text><text><class-ref scheme="cpc">G02F1/395</class-ref></text></CPC-specific-text><text> take precedence</text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/37" definition-exists="false" ipc-concordant="G02F1/37" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/37</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for second-harmonic generation </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G02F1/3532</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/372" definition-exists="false" ipc-concordant="G02F1/37" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/372</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Means for homogenizing the output beam</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/374" definition-exists="false" ipc-concordant="G02F1/37" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/374</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Cherenkov radiation</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/377" definition-exists="false" ipc-concordant="G02F1/377" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/377</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in an optical waveguide structure</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/3775" definition-exists="false" ipc-concordant="G02F1/377" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/3775</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a periodic structure, e.g. domain inversion, for quasi-phase-matching [QPM] </text><reference><text><class-ref scheme="cpc">G02F1/383</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02F1/383" definition-exists="false" ipc-concordant="G02F1/383" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/383</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of the optical fibre type</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F1/39" definition-exists="true" ipc-concordant="G02F1/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/39</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>for parametric generation or amplification of light, infra-red or ultra-violet waves</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/392" definition-exists="false" ipc-concordant="G02F1/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F1/392</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Parametric amplification</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/395" definition-exists="false" ipc-concordant="G02F1/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/395</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in optical waveguides</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02F1/397" definition-exists="false" ipc-concordant="G02F1/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F1/397</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Amplification of light by wave mixing involving an interference pattern, e.g. using photorefractive material</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G02F2/00" definition-exists="true" ipc-concordant="G02F2/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-02-01" status="published"><classification-symbol>G02F2/00</classification-symbol><class-title date-revised="2020-02-01"><title-part><text>Demodulating light</text></title-part><title-part><text>Transferring the modulation of modulated light</text></title-part><title-part><text>Frequency-changing of light </text><reference><text><class-ref scheme="cpc">G02F1/35</class-ref> takes precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02F2/002" definition-exists="true" ipc-concordant="G02F2/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F2/002</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>using optical mixing</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02F2/004" definition-exists="true" ipc-concordant="G02F2/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transferring the modulation of modulated light, i.e. transferring the information from one optical carrier of a first wavelength to a second optical carrier of a second wavelength, e.g. all-optical wavelength converter</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F2/006" definition-exists="false" ipc-concordant="G02F2/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F2/006</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>All-optical wavelength conversion</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F2/008" definition-exists="false" ipc-concordant="G02F2/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02F2/008</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Opto-electronic wavelength conversion, i.e. involving photo-electric conversion of the first optical carrier</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02F2/02" definition-exists="true" ipc-concordant="G02F2/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-02-01" status="published"><classification-symbol>G02F2/02</classification-symbol><class-title date-revised="2020-02-01"><title-part><text>Frequency-changing of light, e.g. by quantum counters</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G02F3/00" definition-exists="true" ipc-concordant="G02F3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-02-01" status="published"><classification-symbol>G02F3/00</classification-symbol><class-title date-revised="2020-02-01"><title-part><text>Optical logic elements</text></title-part><title-part><text>Optical bistable devices</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02F3/02" definition-exists="true" ipc-concordant="G02F3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F3/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Optical bistable devices</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F3/022" definition-exists="false" ipc-concordant="G02F3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F3/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on electro-, magneto- or acousto-optical elements </text><reference><text><class-ref scheme="cpc">G02F3/028</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F3/024" definition-exists="false" ipc-concordant="G02F3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F3/024</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on non-linear elements, e.g. non-linear Fabry-Perot cavity </text><reference><text><class-ref scheme="cpc">G02F3/028</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F3/026" definition-exists="false" ipc-concordant="G02F3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F3/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on laser effects</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02F3/028" definition-exists="false" ipc-concordant="G02F3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F3/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on self electro-optic effect devices [SEED]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G02F7/00" definition-exists="true" ipc-concordant="G02F7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F7/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Optical analogue/digital converters</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> This group <u>covers</u> only converters based in substantial manner on elements which are provided for in group <class-ref scheme="cpc">G02F1/00</class-ref>. </note-paragraph></note></notes-and-warnings></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="true" level="6" additional-only="true" sort-key="G02F201/00" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/00</classification-symbol>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="G02F201/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G02F2201/00</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Constructional arrangements not provided for in groups <class-ref scheme="cpc">G02F1/00</class-ref>&#160;-&#160;<class-ref scheme="cpc">G02F7/00</class-ref></text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F201/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>fibre</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F201/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>monomode</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F201/05" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/05</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>multimode</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F201/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>integrated waveguide</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G02F201/063" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/063</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>ridge</text></title-part><title-part><text>rib</text></title-part><title-part><text>strip loaded</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G02F201/066" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/066</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>channel</text></title-part><title-part><text>buried</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F201/07" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/07</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>buffer layer</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F201/08" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>light absorbing layer</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G02F201/083" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/083</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>infra-red absorbing</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G02F201/086" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/086</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>UV absorbing</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F201/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>electrode</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G02F201/121" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/121</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>common or background</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G02F201/122" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/122</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having a particular pattern</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G02F201/123" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/123</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>pixel</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G02F201/124" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/124</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>interdigital</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G02F201/125" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>delta-beta</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G02F201/126" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/126</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>push-pull</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G02F201/127" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/127</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>travelling wave</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G02F201/128" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/128</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>field shaping</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F201/14" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>asymmetric</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F201/15" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/15</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>periodic</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F201/16" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>series</text></title-part><title-part><text>tandem</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F201/17" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/17</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multi-pass arrangements, i.e. arrangements to pass light a plurality of times through the same element, e.g. by using an enhancement cavity</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F201/18" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>parallel</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F201/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>delay line</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G02F201/205" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/205</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of fibre type</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F201/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>grating</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G02F201/302" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/302</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>grating coupler</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G02F201/305" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/305</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>diffraction grating</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G02F201/307" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/307</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reflective grating, i.e. Bragg grating</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F201/34" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>reflector</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G02F201/343" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/343</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>cholesteric liquid crystal reflector</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G02F201/346" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/346</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>distributed (Bragg) reflector</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F201/36" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Airflow channels, e.g. constructional arrangements facilitating the flow of air</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F201/38" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Anti-reflection arrangements</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F201/40" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2201/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for improving the aperture ratio</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F413/01" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2413/01</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Number of plates being 1</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F413/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2413/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Number of plates being 2</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F413/03" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2413/03</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Number of plates being 3</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F413/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2413/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Number of plates greater than or equal to 4</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F413/05" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2413/05</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Single plate on one side of the LC cell</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F413/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2413/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Two plates on one side of the LC cell</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F413/07" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2413/07</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>All plates on one side of the LC cell</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F413/08" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2413/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with a particular optical axis orientation</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F413/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2413/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with refractive index ellipsoid inclined, or tilted, relative to the LC-layer surface O plate</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G02F413/105" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2413/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with varying inclination in thickness direction, e.g. hybrid oriented discotic LC</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F413/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2413/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Biaxial compensators</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F413/13" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2413/13</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Positive birefingence</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F413/14" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2413/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Negative birefingence</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02F413/15" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02F2413/15</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with twisted orientation, e.g. comprising helically oriented LC-molecules or a plurality of twisted birefringent sublayers</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></class-scheme>