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CPC
COOPERATIVE PATENT CLASSIFICATION
G02F
DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS [2020-02]
WARNINGS

  • The following IPC groups are not in the CPC scheme. The subject matter for these IPC groups is classified in the following CPC groups:
    Subject matter covered by these groups is classified in the following CPC groups:
    G02F1/13357 covered by G02F 1/1336 and subgroups
  • 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.
G02F 1/00
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; Non-linear optics [2021-01]
NOTE

  • This group covers only :
    • 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;
    • 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;
    • control of light by electromagnetic waves, e.g. radio waves, or by electrons or other elementary particles.
G02F 1/0009
.
{Materials therefor} [2013-01]
NOTE

  • G02F 1/0009 and subgroups contain mostly non-patent literature
G02F 1/0018
. .
{Electro-optical materials} [2013-01]
G02F 1/0027
. . .
{Ferro-electric materials} [2021-01]
G02F 1/0036
. .
{Magneto-optical materials} [2021-01]
G02F 1/0045
. .
{Liquid crystals characterised by their physical properties} [2021-01]
G02F 1/0054
. .
{Structure, phase transitions, NMR, ESR, Moessbauer spectra} [2013-01]
G02F 1/0063
. .
{Optical properties, e.g. absorption, reflection or birefringence (materials for non-linear optics G02F 1/355)} [2021-01]
G02F 1/0072
. .
{Mechanical, acoustic, electro-elastic, magneto-elastic properties} [2013-01]
G02F 1/0081
. .
{Electric or magnetic properties} [2013-01]
G02F 1/009
. .
{Thermal properties} [2021-01]
G02F 1/01
.
for the control of the intensity, phase, polarisation or colour  (G02F 1/29, G02F 1/35 take precedence) [2019-01]
WARNING

G02F 1/0102
. .
{Constructional details, not otherwise provided for in this subclass} [2021-01]
G02F 1/0105
. . .
{Illuminating devices} [2021-01]
G02F 1/0107
. . .
{Gaskets, spacers or sealing of cells; Filling and closing of cells} [2021-01]
G02F 1/011
. .
{in optical waveguides, not otherwise provided for in this subclass} [2021-01]
G02F 1/0113
. . .
{Glass-based, e.g. silica-based, optical waveguides} [2021-01]
G02F 1/0115
. . .
{in optical fibres} [2013-01]
G02F 1/0118
. . . .
{by controlling the evanescent coupling of light from a fibre into an active, e.g. electro-optic, overlay} [2013-01]
G02F 1/0121
. .
{Operation of devices; Circuit arrangements, not otherwise provided for in this subclass} [2021-01]
G02F 1/0123
. . .
{Circuits for the control or stabilisation of the bias voltage, e.g. automatic bias control [ABC] feedback loops} [2013-01]
G02F 1/0126
. .
{Opto-optical modulation, i.e. control of one light beam by another light beam, not otherwise provided for in this subclass} [2021-01]
G02F 1/0128
. .
{based on electro-mechanical, magneto-mechanical, elasto-optic effects} [2013-01]
G02F 1/0131
. . .
{based on photo-elastic effects, e.g. mechanically induced birefringence} [2021-01]
G02F 1/0134
. . . .
{in optical waveguides} [2013-01]
G02F 1/0136
. .
{for the control of polarisation, e.g. state of polarisation [SOP] control, polarisation scrambling, TE-TM mode conversion or separation (G02F 1/0353 takes precedence)} [2013-01]
G02F 1/0139
. . .
{Polarisation scrambling devices; Depolarisers} [2021-01]
G02F 1/0142
. . .
{TE-TM mode conversion} [2021-01]
G02F 1/0144
. . .
{TE-TM mode separation} [2021-01]
G02F 1/0147
. .
{based on thermo-optic effects (G02F 1/132 takes precedence)} [2021-01]
G02F 1/015
. .
based on semiconductor elements with at least one potential jump barrier, e.g. PN, PIN junction (G02F 1/03 takes precedence) [2013-01]
G02F 1/0151
. . .
{modulating the refractive index} [2021-01]
G02F 1/0152
. . . .
{using free carrier effects, e.g. plasma effect} [2021-01]
G02F 1/0153
. . . .
{using electro-refraction, e.g. Kramers-Kronig relation} [2021-01]
G02F 1/0154
. . . .
{using electro-optic effects, e.g. linear electro optic [LEO], Pockels, quadratic electro optical [QEO] or Kerr effect} [2021-01]
G02F 1/0155
. . .
{modulating the optical absorption} [2021-01]
G02F 1/0156
. . . .
{using free carrier absorption} [2021-01]
G02F 1/0157
. . . .
{using electro-absorption effects, e.g. Franz-Keldysh [FK] effect or quantum confined stark effect [QCSE]} [2021-01]
G02F 1/0158
. . . . .
{Blue-shift of the absorption band} [2021-01]
G02F 1/0159
. . . . .
{Red-shift of the absorption band} [2021-01]
G02F 1/017
. . .
Structures with periodic or quasi periodic potential variation, e.g. superlattices, quantum wells [2013-01]
G02F 1/01708
. . . .
{in an optical wavequide structure} [2013-01]
G02F 1/01716
. . . .
{Optically controlled superlattice or quantum well devices} [2013-01]
G02F 1/01725
. . . .
{Non-rectangular quantum well structures, e.g. graded or stepped quantum wells} [2021-01]
G02F 1/01733
. . . . .
{Coupled or double quantum wells} [2021-01]
G02F 1/01741
. . . . . .
{Asymmetrically coupled or double quantum wells} [2021-01]
G02F 1/0175
. . . . .
{with a spatially varied well profile, e.g. graded or stepped quantum wells} [2021-01]
G02F 1/01758
. . . . . .
{with an asymmetric well profile, e.g. asymmetrically stepped quantum wells} [2021-01]
G02F 1/01766
. . . .
{Strained superlattice devices; Strained quantum well devices} [2021-01]
G02F 1/01775
. . . .
{involving an inter-subband transition in one well, e.g. e1->e2} [2021-01]
G02F 1/01783
. . . .
{Quantum wires} [2021-01]
G02F 1/01791
. . . .
{Quantum boxes or quantum dots} [2021-01]
G02F 1/025
. . .
in an optical waveguide structure (G02F 1/017, {G02F 1/2257} take precedence) [2013-01]
G02F 1/03
. .
based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect (G02F 1/061 takes precedence) [2013-01]
G02F 1/0305
. . .
{Constructional arrangements (G02F 1/0327 - G02F 1/05 take precedence)} [2016-05]
G02F 1/0311
. . . .
{Structural association of optical elements, e.g. lenses, polarizers, phase plates, with the crystal} [2013-01]
G02F 1/0316
. . . .
{Electrodes} [2013-01]
G02F 1/0322
. . . .
{Arrangements comprising two or more independently controlled crystals} [2013-01]
G02F 1/0327
. . .
{Operation of the cell; Circuit arrangements (G02F 1/05 takes precedence)} [2013-01]
G02F 1/0333
. . .
{addressed by a beam of charged particles (G02F 1/05 takes precedence)} [2021-01]
G02F 1/0338
. . .
{structurally associated with a photoconductive layer or having photo-refractive properties (G02F 1/05 takes precedence)} [2013-01]
G02F 1/0344
. . .
{controlled by a high-frequency electromagnetic wave component in an electric waveguide (G02F 1/0356, G02F 1/05, G02F 1/2255, G02F 1/3134 take precedence)} [2013-01]
G02F 1/035
. . .
in an optical waveguide structure [2013-01]
G02F 1/0353
. . . .
{involving an electro-optic TE-TM mode conversion} [2013-01]
G02F 1/0356
. . . .
{controlled by a high-frequency electromagnetic wave component in an electric waveguide structure} [2013-01]
G02F 1/05
. . .
with ferro-electric properties (G02F 1/035, G02F 1/055 take precedence) [2020-02]
G02F 1/0508
. . . .
{specially adapted for gating or modulating in optical waveguides} [2013-01]
G02F 1/0516
. . . .
{Operation of the cell; Circuit arrangements} [2013-01]
G02F 1/0525
. . . .
{addressed by a beam of charged particles} [2021-01]
G02F 1/0533
. . . .
{structurally associated with a photo-conductive layer} [2013-01]
G02F 1/0541
. . . .
{using photorefractive effects} [2021-01]
G02F 1/055
. . .
the active material being a ceramic (G02F 1/035 takes precedence) [2013-01]
G02F 1/0551
. . . .
{Constructional details} [2013-01]
G02F 1/0553
. . . .
{specially adapted for gating or modulating in optical waveguides} [2013-01]
G02F 1/0555
. . . .
{Operation of the cell; Circuit arrangements} [2013-01]
G02F 1/0556
. . . .
{specially adapted for a particular application} [2013-01]
G02F 1/0558
. . . .
{structurally associated with a photoconductive layer or exhibiting photo-refractive properties} [2013-01]
G02F 1/061
. .
based on electro-optical organic material (G02F 1/07, {G02F 1/13} take precedence) [2013-01]
G02F 1/065
. . .
in an optical waveguide structure [2013-01]
G02F 1/07
. .
based on electro-optical liquids exhibiting Kerr effect [2013-01]
G02F 1/073
. . .
{specially adapted for gating or modulating in optical waveguides} [2013-01]
G02F 1/076
. . .
{Operation of the cell; Circuit arrangements} [2013-01]
G02F 1/09
. .
based on magneto-optical elements, e.g. exhibiting Faraday effect [2013-01]
G02F 1/091
. . .
{based on magneto-absorption or magneto-reflection} [2013-01]
G02F 1/092
. . .
{Operation of the cell; Circuit arrangements} [2013-01]
G02F 1/093
. . .
{used as non-reciprocal devices, e.g. optical isolators, circulators (G02F 1/0955 takes precedence)} [2013-01]
G02F 1/094
. . .
{based on magnetophoretic effect} [2021-01]
G02F 1/095
. . .
in an optical waveguide structure [2013-01]
G02F 1/0955
. . . .
{used as non-reciprocal devices, e.g. optical isolators, circulators} [2013-01]
G02F 1/11
. .
based on acousto-optical elements, e.g. using variable diffraction by sound or like mechanical waves (acousto-optical deflection G02F 1/33) [2021-01]
G02F 1/113
. . .
{Circuit or control arrangements} [2013-01]
G02F 1/116
. . .
{using an optically anisotropic medium, wherein the incident and the diffracted light waves have different polarizations, e.g. acousto-optic tunable filter [AOTF] (G02F 1/125 takes precedence)} [2013-01]
G02F 1/125
. . .
in an optical waveguide structure [2013-01]
G02F 1/13
. .
based on liquid crystals, e.g. single liquid crystal display cells [2020-02]
G02F 1/1303
. . .
{Apparatus specially adapted to the manufacture of LCDs} [2013-01]
G02F 1/1306
. . .
{Details} [2019-05]
G02F 1/1309
. . . .
{Repairing; Testing} [2021-01]
G02F 1/1313
. . .
{specially adapted for a particular application} [2013-01]
G02F 1/1316
. . .
{Methods for cleaning the liquid crystal cells, or components thereof, during manufacture: Materials therefor} [2021-01]
G02F 1/132
. . .
{Thermal activation of liquid crystals exhibiting a thermo-optic effect} [2021-01]
G02F 1/1323
. . .
{Arrangements for providing a switchable viewing angle} [2013-01]
G02F 1/1326
. . .
{Liquid crystal optical waveguides or liquid crystal cells specially adapted for gating or modulating between optical waveguides} [2013-01]
G02F 1/133
. . .
Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements (arrangements or circuits for control of liquid crystal elements in a matrix, not structurally associated with these elements G09G 3/36) [2021-01]
G02F 1/13306
. . . .
{Circuit arrangements or driving methods for the control of single liquid crystal cells (G02F 1/132, G02F 1/133382 take precedence)} [2013-01]
G02F 1/13312
. . . . .
{Circuits comprising photodetectors for purposes other than feedback} [2021-01]
G02F 1/13318
. . . . .
{Circuits comprising a photodetector} [2013-01]
G02F 1/13324
. . . . .
{Circuits comprising solar cells} [2021-01]
G02F 1/1333
. . . .
Constructional arrangements; {Manufacturing methods}(G02F 1/135, G02F 1/136 take precedence) [2013-01]
G02F 1/133302
. . . . .
{Rigid substrates, e.g. inorganic substrates} [2021-01]
G02F 1/133305
. . . . .
{Flexible substrates, e.g. plastics, organic film} [2013-01]
G02F 1/133308
. . . . .
{Support structures for LCD panels, e.g. frames or bezels} [2021-01]
G02F 1/133311
. . . . . .
{Environmental protection, e.g. against dust or humidity} [2021-01]
G02F 1/133314
. . . . . .
{Back frames} [2021-01]
G02F 1/133317
. . . . . .
{Intermediate frames, e.g. between backlight housing and front frame} [2021-01]
G02F 1/13332
. . . . . .
{Front frames} [2021-01]
G02F 1/133322
. . . . . .
{Mechanical guidance or alignment of LCD panel support components} [2021-01]
G02F 1/133325
. . . . . .
{Assembling processes} [2021-01]
G02F 1/133328
. . . . . .
{Segmented frames} [2021-01]
G02F 1/133331
. . . . . .
{Cover glasses} [2021-01]
G02F 1/133334
. . . . . .
{Electromagnetic shields} [2021-01]
G02F 1/133337
. . . . .
{Layers preventing ion diffusion, e.g. by ion absorption} [2021-01]
G02F 1/13334
. . . . .
{Plasma addressed liquid crystal cells [PALC]} [2021-01]
G02F 1/133342
. . . . .
{for double-sided displays} [2021-01]
G02F 1/133345
. . . . .
{Insulating layers (G02F 1/1335, G02F 1/1337, G02F 1/135, G02F 1/136 take precedence)} [2013-01]
G02F 1/133348
. . . . .
{Charged particles addressed liquid crystal cells, e.g. controlled by an electron beam} [2021-01]
G02F 1/133351
. . . . .
{Manufacturing of individual cells out of a plurality of cells, e.g. by dicing} [2013-01]
G02F 1/133354
. . . . .
{Arrangements for aligning or assembling substrates} [2021-01]
G02F 1/133357
. . . . .
{Planarisation layers} [2021-01]
G02F 1/13336
. . . . .
{Combining plural substrates to produce large-area displays, e.g. tiled displays} [2013-01]
G02F 1/133362
. . . . .
{Optically addressed liquid crystal cells (G02F 1/135 takes precedence)} [2013-01]
G02F 1/133365
. . . . .
{Cells in which the active layer comprises a liquid crystalline polymer} [2021-01]
G02F 1/133368
. . . . .
{Cells having two substrates with different characteristics, e.g. different thickness or material} [2021-01]
G02F 1/133371
. . . . .
{Cells with varying thickness of the liquid crystal layer} [2013-01]
G02F 1/133374
. . . . .
{for displaying permanent signs or marks} [2021-01]
G02F 1/133377
. . . . .
{Cells with plural compartments or having plurality of liquid crystal microcells partitioned by walls, e.g. one microcell per pixel} [2017-08]
G02F 1/13338
. . . . .
{Input devices, e.g. touch panels} [2021-01]
G02F 1/133382
. . . . .
{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} [2013-01]
G02F 1/133385
. . . . . .
{with cooling means, e.g. fans} [2013-01]
G02F 1/133388
. . . . .
{with constructional differences between the display region and the peripheral region} [2021-01]
G02F 1/133391
. . . . .
{Constructional arrangement for sub-divided displays} [2021-01]
G02F 1/133394
. . . . .
{Piezoelectric elements associated with the cells} [2021-01]
G02F 1/133397
. . . . .
{for suppressing after-image or image-sticking} [2021-01]
G02F 1/1334
. . . . .
based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals [2021-01]
G02F 1/13342
. . . . . .
{Holographic polymer dispersed liquid crystals} [2013-01]
G02F 1/13345
. . . . . .
{Network or three-dimensional gels} [2021-01]
G02F 1/13347
. . . . . .
{working in reverse mode, i.e. clear in the off-state and scattering in the on-state} [2021-01]
G02F 1/1335
. . . . .
Structural association of cells with optical devices, e.g. polarisers or reflectors [2019-01]
G02F 1/133502
. . . . . .
{Antiglare, refractive index matching layers} [2013-01]
G02F 1/133504
. . . . . .
{Diffusing, scattering, diffracting elements (associated to illuminating devices G02F 1/133606)} [2015-07]
G02F 1/133507
. . . . . . .
{Films for enhancing the luminance} [2021-01]
G02F 1/133509
. . . . . .
{Filters, e.g. light shielding masks} [2021-01]
G02F 1/133512
. . . . . . .
{Light shielding layers, e.g. black matrix (G02F 1/136209 takes precedence)} [2013-01]
G02F 1/133514
. . . . . . .
{Colour filters} [2021-01]
G02F 1/133516
. . . . . . . .
{Methods for their manufacture, e.g. printing, electro-deposition or photolithography} [2021-01]
G02F 1/133519
. . . . . . . .
{Overcoatings} [2021-01]
G02F 1/133521
. . . . . . . .
{Interference filters} [2021-01]
G02F 1/133524
. . . . . .
{Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides} [2013-01]
G02F 1/133526
. . . . . .
{Lenses, e.g. microlenses or Fresnel lenses} [2021-01]
G02F 1/133528
. . . . . .
{Polarisers} [2021-01]
G02F 1/133531
. . . . . . .
{characterised by the arrangement of polariser or analyser axes} [2021-01]
G02F 1/133533
. . . . . . .
{Colour selective polarisers (G02F 1/1347 takes precedence)} [2013-01]
G02F 1/133536
. . . . . . .
{Reflective polarizers (G02F 1/13362 takes precedence)} [2013-01]
G02F 1/133538
. . . . . . .
{with spatial distribution of the polarisation direction} [2021-01]
G02F 1/133541
. . . . . . .
{Circular polarisers} [2021-01]
G02F 1/133543
. . . . . . .
{Cholesteric polarisers} [2021-01]
G02F 1/133545
. . . . . . .
{Dielectric stack polarisers} [2021-01]
G02F 1/133548
. . . . . . .
{Wire-grid polarisers} [2021-01]
G02F 1/13355
. . . . . . .
{Polarising beam splitters [PBS]} [2021-01]
G02F 1/133553
. . . . . .
{Reflecting elements (associated to illuminating devices G02F 1/133605)} [2015-07]
G02F 1/133555
. . . . . . .
{Transflectors} [2013-01]
G02F 1/133557
. . . . . . . .
{Half-mirrors} [2021-01]
G02F 1/13356
. . . . . .
{characterised by the placement of the optical elements} [2021-01]
G02F 1/133562
. . . . . . .
{on the viewer side} [2021-01]
G02F 1/133565
. . . . . . .
{inside the LC elements, i.e. between the cell substrates} [2021-01]
G02F 1/133567
. . . . . . .
{on the back side} [2021-01]
G02F 1/1336
. . . . . .
{Illuminating devices} [2021-01]
G02F 1/133601
. . . . . . .
{for spatial active dimming} [2021-01]
G02F 1/133602
. . . . . . .
{Direct backlight} [2020-02]
G02F 1/133603
. . . . . . . .
{with LEDs} [2020-02]
G02F 1/133604
. . . . . . . .
{with lamps} [2020-02]
G02F 1/133605
. . . . . . . .
{including specially adapted reflectors} [2020-02]
G02F 1/133606
. . . . . . . .
{including a specially adapted diffusing, scattering or light controlling members} [2020-02]
G02F 1/133607
. . . . . . . . .
{the light controlling member including light directing or refracting elements, e.g. prisms or lenses} [2021-01]
G02F 1/133608
. . . . . . . .
{including particular frames or supporting means} [2020-02]
G02F 1/133609
. . . . . . . .
{including means for improving the color mixing, e.g. white} [2020-02]
G02F 1/133611
. . . . . . . .
{including means for improving the brightness uniformity} [2020-02]
G02F 1/133612
. . . . . . . .
{Electrical details} [2021-01]
G02F 1/133613
. . . . . . . .
{characterized by the sequence of light sources} [2021-01]
G02F 1/133614
. . . . . . .
{using photoluminescence, e.g. phosphors illuminated by UV or blue light} [2021-01]
G02F 1/133615
. . . . . . .
{Edge-illuminating devices, i.e. illuminating from the side (G02B 6/0001 takes precedence)} [2020-02]
G02F 1/133616
. . . . . . .
{Front illuminating devices} [2021-01]
G02F 1/133617
. . . . . . .
{Illumination with ultra-violet light; Luminescent elements or materials associated to the cell} [2020-02]
G02F 1/133618
. . . . . . .
{for ambient light} [2021-01]
G02F 1/13362
. . . . . . .
{providing polarized light, e.g. by converting a polarisation component into another one} [2021-01]
G02F 1/133621
. . . . . . .
{providing coloured light (G02F 1/133617, G02F 1/133533 take precedence)} [2020-02]
G02F 1/133622
. . . . . . . .
{Colour sequential illumination} [2021-01]
G02F 1/133623
. . . . . . . .
{Inclined coloured light beams} [2021-01]
G02F 1/133624
. . . . . . .
{characterised by their spectral emissions} [2021-01]
G02F 1/133625
. . . . . . .
{Electron stream lamps} [2021-01]
G02F 1/133626
. . . . . . .
{providing two modes of illumination, e.g. day-night} [2021-01]
G02F 1/133627
. . . . . . . .
{Projection-direct viewing} [2021-01]
G02F 1/133628
. . . . . . .
{with cooling means} [2021-01]
G02F 1/13363
. . . . . .
Birefringent elements, e.g. for optical compensation [2013-01]
G02F 1/133631
. . . . . . .
{with a spatial distribution of the retardation value} [2021-01]
G02F 1/133632
. . . . . . .
{with refractive index ellipsoid inclined relative to the LC-layer surface} [2013-01]
G02F 1/133633
. . . . . . .
{using mesogenic materials} [2021-01]
G02F 1/133634
. . . . . . .
{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} [2013-01]
G02F 1/133635
. . . . . . .
{Multifunctional compensators} [2021-01]
G02F 1/133636
. . . . . . .
{with twisted orientation, e.g. comprising helically oriented LC-molecules or a plurality of twisted birefringent sublayers} [2013-01]
G02F 1/133637
. . . . . . .
{characterised by the wavelength dispersion} [2021-01]
G02F 1/133638
. . . . . . .
{Waveplates, i.e. plates with a retardation value of lambda/n} [2021-01]
G02F 1/1337
. . . . .
Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers [2013-01]
G02F 1/133703
. . . . . .
{by introducing organic surfactant additives into the liquid crystal material (C09K 19/56 takes precedence)} [2013-01]
G02F 1/133707
. . . . . .
{Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes} [2013-01]
G02F 1/133711
. . . . . .
{by organic films, e.g. polymeric films} [2013-01]
G02F 1/133715
. . . . . . .
{by first depositing a monomer} [2021-01]
G02F 1/133719
. . . . . . .
{with coupling agent molecules, e.g. silane} [2013-01]
G02F 1/133723
. . . . . . .
{Polyimide, polyamide-imide} [2013-01]
G02F 1/133726
. . . . . . .
{made of a mesogenic material} [2021-01]
G02F 1/13373
. . . . . .
{Disclination line; Reverse tilt} [2021-01]
G02F 1/133734
. . . . . .
{by obliquely evaporated films, e.g. Si or SiO2 films} [2013-01]
G02F 1/133738
. . . . . .
{for homogeneous alignment} [2021-01]
G02F 1/133742
. . . . . .
{for homeotropic alignment} [2021-01]
G02F 1/133746
. . . . . .
{for high pretilt angles, i.e. higher than 15 degrees} [2021-01]
G02F 1/133749
. . . . . .
{for low pretilt angles, i.e. lower than 15 degrees} [2021-01]
G02F 1/133753
. . . . . .
{with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle} [2013-01]
G02F 1/133757
. . . . . . .
{with different alignment orientations} [2021-01]
G02F 1/133761
. . . . . . .
{with different pretilt angles} [2021-01]
G02F 1/133765
. . . . . .
{without a surface treatment} [2021-01]
G02F 1/133769
. . . . . .
{comprising an active, e.g. switchable, alignment layer} [2021-01]
G02F 1/133773
. . . . . .
{the alignment material or treatment being different for the two opposite substrates} [2021-01]
G02F 1/133776
. . . . . .
{having structures locally influencing the alignment, e.g. unevenness} [2021-01]
G02F 1/13378
. . . . . .
{by treatment of the surface, e.g. embossing, rubbing or light irradiation (G02F 1/133711, G02F 1/133734, G02F 1/133753 take precedence)} [2021-01]
G02F 1/133784
. . . . . . .
{by rubbing} [2013-01]
G02F 1/133788
. . . . . . .
{by light irradiation, e.g. linearly polarised light photo-polymerisation} [2013-01]
G02F 1/133792
. . . . . . .
{by etching} [2021-01]
G02F 1/133796
. . . . . .
{having conducting property} [2021-01]
G02F 1/1339
. . . . .
Gaskets; Spacers; Sealing of cells [2019-01]
G02F 1/13392
. . . . . .
{spacers dispersed on the cell substrate, e.g. spherical particles, microfibres} [2017-08]
G02F 1/13394
. . . . . .
{spacers regularly patterned on the cell subtrate, e.g. walls, pillars (G02F 1/133377 takes precedence)} [2013-01]
G02F 1/13396
. . . . . .
{Spacers having different sizes} [2021-01]
G02F 1/13398
. . . . . .
{Spacer materials; Spacer properties} [2021-01]
G02F 1/1341
. . . . .
Filling or closing of cells [2019-01]
G02F 1/13415
. . . . . .
{Drop filling process} [2021-01]
G02F 1/1343
. . . . .
Electrodes {(reflective electrodes G02F 1/133553)} [2013-01]
G02F 1/134309
. . . . . .
{characterised by their geometrical arrangement} [2021-01]
G02F 1/134318
. . . . . . .
{having a patterned common electrode} [2021-01]
G02F 1/134327
. . . . . . .
{Segmented, e.g. alpha numeric display} [2013-01]
G02F 1/134336
. . . . . . .
{Matrix} [2013-01]
G02F 1/134345
. . . . . . .
{Subdivided pixels, e.g. for grey scale or redundancy} [2021-01]
G02F 1/134354
. . . . . . . .
{the sub-pixels being capacitively coupled} [2021-01]
G02F 1/134363
. . . . . . .
{for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]} [2013-01]
G02F 1/134372
. . . . . . .
{for fringe field switching [FFS] where the common electrode is not patterned} [2021-01]
G02F 1/134381
. . . . . . .
{Hybrid switching mode, i.e. for applying an electric field with components parallel and orthogonal to the substrates} [2021-01]
G02F 1/13439
. . . . . .
{characterised by their electrical, optical, physical properties; materials therefor; method of making} [2013-01]
G02F 1/1345
. . . . .
Conductors connecting electrodes to cell terminals [2013-01]
G02F 1/13452
. . . . . .
{Conductors connecting driver circuitry and terminals of panels (H01L 21/00 takes precedence; electrical details inside the cell G02F 1/133;)} [2013-01]
G02F 1/13454
. . . . . .
{Drivers integrated on the active matrix substrate (G02F 1/136277 takes precedence)} [2013-01]
G02F 1/13456
. . . . . .
{Cell terminals located on one side of the display only} [2021-01]
G02F 1/13458
. . . . . .
{Terminal pads} [2013-01]
G02F 1/1347
. . . . .
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 [2020-02]
G02F 1/13471
. . . . . .
{in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells (G02F 1/13475 takes precedence)} [2013-01]
G02F 1/13473
. . . . . . .
{for wavelength filtering or for colour display without the use of colour mosaic filters} [2013-01]
G02F 1/13475
. . . . . .
{in which at least one liquid crystal cell or layer is doped with a pleochroic dye, e.g. GH-LC cell (G02F 1/13476 takes precedence)} [2013-01]
G02F 1/13476
. . . . . .
{in which at least one liquid crystal cell or layer assumes a scattering state} [2013-01]
G02F 1/13478
. . . . . .
{based on selective reflection} [2021-01]
G02F 1/135
. . . .
Liquid crystal cells structurally associated with a photoconducting or a ferro-electric layer, the properties of which can be optically or electrically varied {(G02F 1/133348 takes precedence)} [2013-01]
G02F 1/1351
. . . . .
{Light-absorbing or blocking layers} [2021-01]
G02F 1/1352
. . . . .
{Light-reflecting layers} [2021-01]
G02F 1/1354
. . . . .
{having a particular photoconducting structure or material} [2013-01]
G02F 1/1355
. . . . . .
{Materials or manufacture processes thereof} [2021-01]
G02F 1/1357
. . . . .
{Electrode structure} [2021-01]
G02F 1/1358
. . . . .
{the supplementary layer being a ferro-electric layer} [2013-01]
G02F 1/136
. . . .
Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit (G02F 1/135 takes precedence) [2013-01]
G02F 1/13606
. . . . .
{having means for reducing parasitic capacitance} [2021-01]
G02F 1/13613
. . . . .
{the semiconductor element being formed on a first substrate and thereafter transferred to the final cell substrate} [2021-01]
G02F 1/1362
. . . . .
Active matrix addressed cells {(G02F 1/134336, G02F 1/134363 take precedence)} [2013-01]
G02F 1/136204
. . . . . .
{Arrangements to prevent high voltage or static electricity failures} [2013-01]
G02F 1/136209
. . . . . .
{Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element} [2013-01]
G02F 1/136213
. . . . . .
{Storage capacitors associated with the pixel electrode} [2013-01]
G02F 1/136218
. . . . . .
{Shield electrodes} [2021-01]
G02F 1/136222
. . . . . .
{Colour filters incorporated in the active matrix substrate} [2021-01]
G02F 1/136227
. . . . . .
{Through-hole connection of the pixel electrode to the active element through an insulation layer} [2013-01]
G02F 1/136231
. . . . . .
{for reducing the number of lithographic steps} [2021-01]
G02F 1/136236
. . . . . . .
{using a grey or half tone lithographic process} [2021-01]
G02F 1/13624
. . . . . .
{having more than one switching element per pixel} [2013-01]
G02F 1/136245
. . . . . . .
{having complementary transistors} [2021-01]
G02F 1/13625
. . . . . .
{Patterning using multi-mask exposure} [2021-01]
G02F 1/136254
. . . . . .
{Checking; Testing} [2021-01]
G02F 1/136259
. . . . . .
{Repairing; Defects} [2013-01]
G02F 1/136263
. . . . . . .
{Line defects} [2021-01]
G02F 1/136268
. . . . . . .
{Switch defects} [2021-01]
G02F 1/136272
. . . . . . .
{Auxiliary lines} [2021-01]
G02F 1/136277
. . . . . .
{formed on a semiconductor substrate, e.g. of silicon} [2021-01]
G02F 1/136281
. . . . . . .
{having a transmissive semiconductor substrate} [2021-01]
G02F 1/136286
. . . . . .
{Wiring, e.g. gate line, drain line} [2013-01]
G02F 1/13629
. . . . . . .
{Multilayer wirings} [2021-01]
G02F 1/136295
. . . . . . .
{Materials; Compositions; Manufacture processes} [2021-01]
G02F 1/1365
. . . . . .
in which the switching element is a two-electrode device {(G02F 1/136277 takes precedence)} [2013-01]
G02F 1/1368
. . . . . .
in which the switching element is a three-electrode device {(G02F 1/136277 takes precedence)} [2013-01]
G02F 1/13685
. . . . . . .
{Top gates} [2021-01]
G02F 1/137
. . .
characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering [2019-01]
G02F 1/13706
. . . .
{the liquid crystal having positive dielectric anisotropy} [2021-01]
G02F 1/13712
. . . .
{the liquid crystal having negative dielectric anisotropy} [2021-01]
G02F 1/13718
. . . .
{based on a change of the texture state of a cholesteric liquid crystal} [2013-01]
G02F 1/13725
. . . .
{based on guest-host interaction (G02F 1/13762, G02F 1/13737, take precedence)} [2013-01]
G02F 1/13731
. . . .
{based on a field-induced phase transition (G02F 1/13781 takes precedence)} [2013-01]
G02F 1/13737
. . . . .
{in liquid crystals doped with a plechroic dye} [2013-01]
G02F 1/13743
. . . .
{based on electrohydrodynamic instabilities or domain formation in liquid crystals} [2013-01]
G02F 1/1375
. . . . .
{using dynamic scattering} [2013-01]
G02F 1/13756
. . . .
{the liquid crystal selectively assuming a light-scattering state (G02F 1/1334G02F 1/13718 take precedence)} [2021-01]
G02F 1/13762
. . . .
{containing luminescent or electroluminescent additives} [2021-01]
G02F 1/13768
. . . .
{based on magneto-optical effects} [2013-01]
G02F 1/13775
. . . .
{Polymer-stabilized liquid crystal layers} [2021-01]
G02F 1/13781
. . . .
{using smectic liquid crystals (G02F 1/141 takes precedence)} [2013-01]
G02F 1/13787
. . . .
{Hybrid-alignment cells (G02F 1/1393 takes precedence)} [2021-01]
G02F 1/13793
. . . .
{Blue phases} [2021-01]
G02F 1/139
. . . .
based on orientation effects in which the liquid crystal remains transparent [2013-01]
G02F 1/1391
. . . . .
{Bistable or multi-stable liquid crystal cells (G02F 1/141 takes precedence)} [2013-01]
G02F 1/1392
. . . . .
{using a field-induced sign-reversal of the dielectric anisotropy} [2013-01]
G02F 1/1393
. . . . .
{the birefringence of the liquid crystal being electrically controlled, e.g. ECB-, DAP-, HAN-, PI-LC cells (G02F 1/1396, G02F 1/141 take precedence)} [2013-01]
G02F 1/1395
. . . . . .
{Optically compensated birefringence [OCB]- cells or PI- cells} [2013-01]
G02F 1/1396
. . . . .
{the liquid crystal being selectively controlled between a twisted state and a non-twisted state, e.g. TN-LC cell (G02F 1/141 takes precedence)} [2013-01]
G02F 1/1397
. . . . . .
{the twist being substantially higher than 90°, e.g. STN-, SBE-, OMI-LC cells} [2013-01]
G02F 1/1398
. . . . . .
{the twist being below 90°} [2021-01]
G02F 1/141
. . . . .
using ferroelectric liquid crystals [2013-01]
G02F 1/1412
. . . . . .
{Antiferroelectric liquid crystals} [2021-01]
G02F 1/1414
. . . . . .
{Deformed helix ferroelectric [DHL]} [2021-01]
G02F 1/1416
. . . . . .
{Details of the smectic layer structure, e.g. bookshelf, chevron, C1 and C2} [2013-01]
G02F 1/1418
. . . . . .
{using smectic liquid crystals, e.g. based on the electroclinic effect} [2013-01]
G02F 1/15
. .
based on an electrochromic effect [2019-01]
WARNING

  • Group G02F 1/15 is impacted by reclassification into groups G02F 1/1514 and G02F 1/1516.
    All groups listed in this Warning should be considered in order to perform a complete search.
G02F 2001/1502
. . .
{complementary cell} [2013-01]
G02F 2001/15025
. . . .
{having an inorganic electrochromic layer and a second solid organic electrochromic layer} [2019-01]
G02F 1/1503
. . .
caused by oxidation-reduction reactions in organic liquid solutions, e.g. viologen solutions [2019-01]
G02F 1/1506
. . .
caused by electrodeposition, e.g. electrolytic deposition of an inorganic material on or close to an electrode [2019-01]
G02F 1/1508
. . . .
{using a solid electrolyte} [2013-01]
G02F 1/1514
. . .
characterised by the electrochromic material, e.g. by the electrodeposited material [2019-01]
WARNING

G02F 2001/15145
. . . .
{the electrochromic layer comprises a mixture of anodic and cathodic compounds} [2019-01]
G02F 1/1516
. . . .
comprising organic material [2019-01]
WARNING

G02F 1/15165
. . . . .
{Polymers} [2019-01]
G02F 2001/1517
. . . . .
{Cyano complex compounds, e.g. Prussian blue} [2019-01]
G02F 2001/1518
. . . . .
{Ferrocene compounds} [2019-01]
G02F 1/1523
. . . .
comprising inorganic material [2019-01]
WARNING

G02F 1/1524
. . . . .
Transition metal compounds [2019-01]
WARNING

G02F 1/15245
. . . . . .
{based on iridium oxide or hydroxide} [2019-01]
G02F 1/1525
. . . . .
{characterised by a particular ion transporting layer, e.g. electrolyte} [2019-01]
G02F 1/153
. . .
Constructional details [2019-01]
G02F 1/1533
. . . .
{structural features not otherwise provided for} [2013-01]
G02F 2001/1536
. . . . .
{additional, e.g. protective, layer inside the cell} [2013-01]
G02F 1/155
. . . .
Electrodes [2013-01]
G02F 2001/1552
. . . . .
{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 (prior to the one referred to above)----} [2013-01]
G02F 2001/1555
. . . . .
{Counter electrode} [2013-01]
G02F 2001/1557
. . . . .
{Side by side arrangements of working and counter electrodes} [2013-01]
G02F 1/157
. . . .
Structural association of cells with optical devices, e.g. reflectors or illuminating devices [2019-01]
G02F 1/161
. . . .
Gaskets; Spacers; Sealing of cells; Filling or closing of cells [2019-01]
G02F 1/163
. . .
Operation of electrochromic cells, e.g. electrodeposition cells; Circuit arrangements therefor [2019-01]
G02F 2001/1635
. . . .
{the pixel comprises active switching elements, e.g. TFT} [2013-01]
G02F 2001/164
. . .
{the electrolyte is made of polymers} [2019-01]
G02F 1/165
. .
based on translational movement of particles in a fluid under the influence of an applied field [2019-01]
WARNING

  • Group G02F 1/165 is incomplete pending reclassification of documents from groups G02F 1/01, G02F 1/17, and G02F 1/19.
    All groups listed above should be considered in order to perform a complete search.
G02F 1/166
. . .
characterised by the electro-optical or magneto-optical effect [2019-01]
WARNING

  • Group G02F 1/166 is incomplete pending reclassification of documents from group G02F 1/01, G02F 1/17, and G02F 1/19.
    All groups listed above should be considered in order to perform a complete search.
G02F 1/167
. . . .
by electrophoresis [2019-01]
WARNING

G02F 1/1671
. . . .
involving dry toners [2019-01]
G02F 1/1673
. . . .
by magnetophoresis [2019-01]
WARNING

G02F 1/1675
. . .
Constructional details [2019-01]
WARNING

G02F 1/16753
. . . .
Structures for supporting or mounting cells, e.g. frames or bezels [2019-01]
WARNING

G02F 1/16755
. . . .
Substrates [2019-01]
WARNING

G02F 1/16756
. . . .
Insulating layers [2019-01]
WARNING

G02F 1/16757
. . . .
Microcapsules [2019-01]
WARNING

G02F 1/1676
. . . .
Electrodes [2019-01]
WARNING

G02F 1/16761
. . . . .
Side-by-side arrangement of working electrodes and counter-electrodes [2019-01]
WARNING

  • Group G02F 1/16761 is incomplete pending reclassification of documents from group G02F 1/1676.
    All groups listed above should be considered in order to perform a complete search.
G02F 1/16762
. . . . .
having three or more electrodes per pixel [2019-01]
WARNING

  • Group G02F 1/16762 is incomplete pending reclassification of documents from group G02F 1/1676.
    All groups listed above should be considered in order to perform a complete search.
G02F 1/16766
. . . . .
for active matrices [2019-01]
WARNING

  • Group G02F 1/16766 is incomplete pending reclassification of documents from group G02F 1/1676.
    All groups listed above should be considered in order to perform a complete search.
G02F 1/1677
. . . .
Structural association of cells with optical devices, e.g. reflectors or illuminating devices [2019-01]
WARNING

G02F 2001/1678
. . . .
{characterised by the composition or particle type} [2019-01]
G02F 1/1679
. . . .
Gaskets; Spacers; Sealing of cells; Filling or closing of cells [2019-01]
WARNING

G02F 1/1681
. . . . .
having two or more microcells partitioned by walls, e.g. of microcup type [2019-01]
G02F 1/1685
. . .
Operation of cells; Circuit arrangements affecting the entire cell [2019-01]
WARNING

G02F 1/169
. .
based on orientable non-spherical particles having a common optical characteristic, e.g. suspended particles of reflective metal flakes [2019-01]
WARNING

  • Group G02F 1/169 is incomplete pending reclassification of documents from groups G02F 1/17 and G02F 1/19.
    All groups listed above should be considered in order to perform a complete search.
G02F 1/17
. .
based on variable-absorption elements not provided for in groups G02F 1/015 - G02F 1/169 [2019-01]
WARNING

G02F 1/172
. . .
{based on a suspension of orientable dipolar particles, e.g. suspended particles displays} [2013-01]
G02F 1/174
. . .
{based on absorption band-shift, e.g. Stark - or Franz-Keldysh effect (G02F 1/015, G02F 1/178 take precedence)} [2013-01]
G02F 1/176
. . .
{using acid- based indicators} [2013-01]
G02F 1/178
. . .
{based on pressure effects (G02F 1/195 takes precedence)} [2013-01]
G02F 1/19
. .
based on variable-reflection or variable-refraction elements not provided for in groups G02F 1/015 - G02F 1/169 [2019-01]
WARNING

G02F 1/195
. . .
{by using frustrated reflection (digital reflection using controlled total internal reflection G02F 1/315)} [2013-01]
G02F 1/21
. .
by interference [2013-01]
G02F 1/211
. . .
{Sagnac type} [2021-01]
G02F 1/212
. . .
{Mach-Zehnder type} [2021-01]
G02F 1/213
. . .
{Fabry-Perot type} [2021-01]
G02F 1/215
. . .
{Michelson type} [2021-01]
G02F 1/216
. . .
{using liquid crystals, e.g. liquid crystal Fabry-Perot filters} [2013-01]
G02F 1/217
. . .
{Multimode interference type} [2021-01]
G02F 1/218
. . .
{using semi-conducting materials} [2013-01]
G02F 1/225
. . .
in an optical waveguide structure [2013-01]
G02F 1/2252
. . . .
{in optical fibres} [2013-01]
G02F 1/2255
. . . .
{controlled by a high-frequency electromagnetic component in an electric waveguide structure} [2013-01]
G02F 1/2257
. . . .
{the optical waveguides being made of semiconducting material} [2013-01]
G02F 1/23
. .
for the control of the colour (G02F 1/03 - G02F 1/21 take precedence) [2016-05]
G02F 1/25
. . .
as to hue or predominant wavelength [2013-01]
G02F 1/29
.
for the control of the position or the direction of light beams, i.e. deflection [2020-02]
G02F 1/291
. .
{Two-dimensional analogue deflection} [2021-01]
G02F 1/292
. .
{by controlled diffraction or phased-array beam steering (controlled diffraction for optical switching G02F 1/31)} [2013-01]
G02F 1/293
. .
{by another light beam, i.e. opto-optical deflection} [2013-01]
G02F 1/294
. .
{Variable focal length devices} [2021-01]
G02F 1/295
. .
{Analog deflection from or} in an optical waveguide structure] [2013-01]
G02F 1/2955
. . .
{by controlled diffraction or phased-array beam steering (controlled diffraction for optical waveguide switching G02F 1/313)} [2013-01]
G02F 1/31
. .
Digital deflection, {i.e. optical switching}(G02F 1/33 takes precedence) [2013-01]
G02F 1/311
. . .
{Cascade arrangement of plural switches} [2021-01]
G02F 1/313
. . .
in an optical waveguide structure [2013-01]
G02F 1/3131
. . . .
{in optical fibres} [2013-01]
G02F 1/3132
. . . .
{of directional coupler type} [2021-01]
G02F 1/3133
. . . . .
{the optical waveguides being made of semiconducting materials} [2013-01]
G02F 1/3134
. . . . .
{controlled by a high-frequency electromagnetic wave component in an electric waveguide structure} [2013-01]
G02F 1/3135
. . . . .
{Vertical structure} [2021-01]
G02F 1/3136
. . . .
{of interferometric switch type} [2013-01]
G02F 1/3137
. . . .
{with intersecting or branching waveguides, e.g. X-switches and Y-junctions} [2013-01]
G02F 1/3138
. . . . .
{the optical waveguides being made of semiconducting materials} [2013-01]
G02F 1/315
. . .
based on the use of controlled internal reflection [2013-01]
G02F 1/33
. .
Acousto-optical deflection devices {(circuit or control arrangements therefor G02F 1/113)} [2013-01]
G02F 1/332
. . .
{comprising a plurality of transducers on the same crystal surface, e.g. multi-channel Bragg cell} [2013-01]
G02F 1/335
. . .
having an optical waveguide structure [2013-01]
G02F 1/35
.
Non-linear optics [2020-02]
G02F 1/3501
. .
{Constructional details or arrangements of non-linear optical devices, e.g. shape of non-linear crystals} [2021-01]
G02F 1/3503
. . .
{Structural association of optical elements, e.g. lenses, with the non-linear optical device} [2021-01]
G02F 1/3505
. . .
{Coatings; Housings; Supports} [2021-01]
G02F 1/3507
. . .
{Arrangements comprising two or more nonlinear optical devices} [2021-01]
G02F 1/3509
. . .
{Shape, e.g. shape of end face} [2021-01]
G02F 1/3511
. .
{Self-focusing or self-trapping of light; Light-induced birefringence; Induced optical Kerr-effect} [2021-01]
G02F 1/3513
. . .
{Soliton propagation} [2013-01]
G02F 1/3515
. .
{All-optical modulation, gating, switching, e.g. control of a light beam by another light beam (G02F 1/353, G02F 1/37, G02F 1/39 take precedence)} [2013-01]
G02F 1/3517
. . .
{using an interferometer} [2013-01]
G02F 1/3519
. . . .
{of Sagnac type, i.e. nonlinear optical loop mirror [NOLM]} [2013-01]
G02F 1/3521
. . .
{using a directional coupler} [2013-01]
G02F 1/3523
. .
{Non-linear absorption changing by light, e.g. bleaching} [2021-01]
G02F 1/3525
. .
{Optical damage} [2013-01]
G02F 1/3526
. .
{using two-photon emission or absorption processes} [2021-01]
G02F 1/3528
. .
{for producing a supercontinuum} [2021-01]
G02F 1/353
. .
{Frequency conversion, i.e. wherein a light beam is generated with frequency components different from those of the incident light beams} [2021-01]
G02F 1/3532
. . .
{Arrangements of plural nonlinear devices for generating multi-colour light beams, e.g. arrangements of SHG, SFG, OPO devices for generating RGB light beams} [2013-01]
G02F 1/3534
. . .
{Three-wave interaction, e.g. sum-difference frequency generation (G02F 1/3532 takes precedence)} [2013-01]
G02F 1/3536
. . .
{Four-wave interaction} [2013-01]
G02F 1/3538
. . . .
{for optical phase conjugation (H01S 3/10076 takes precedence)} [2013-01]
G02F 1/354
. . .
{Third or higher harmonic generation} [2021-01]
G02F 1/3542
. . .
{Multipass arrangements, i.e. arrangements to make light pass multiple times through the same element, e.g. using an enhancement cavity} [2021-01]
G02F 1/3544
. . .
{Particular phase matching techniques} [2013-01]
G02F 1/3546
. . . .
{Active phase matching, e.g. by electro- or thermo-optic tuning} [2021-01]
G02F 1/3548
. . . .
{Quasi phase matching [QPM], e.g. using a periodic domain inverted structure} [2021-01]
G02F 1/355
. .
characterised by the materials used [2013-01]
G02F 1/3551
. . .
{Crystals} [2013-01]
G02F 1/3553
. . . .
{having the formula MTiOYO4, where M=K, Rb, TI, NH4 or Cs and Y=P or As, e.g. KTP} [2013-01]
G02F 1/3555
. . .
{Glasses} [2013-01]
G02F 1/3556
. . .
{Semiconductor materials, e.g. quantum wells} [2013-01]
G02F 1/3558
. . .
{Poled materials, e.g. with periodic poling; Fabrication of domain inverted structures, e.g. for quasi-phase-matching [QPM]} [2013-01]
G02F 1/361
. . .
Organic materials [2013-01]
G02F 1/3611
. . . .
{containing Nitrogen} [2013-01]
G02F 1/3612
. . . . .
{Heterocycles having N as heteroatom} [2013-01]
G02F 1/3613
. . . .
{containing Sulfur} [2013-01]
G02F 1/3614
. . . . .
{Heterocycles having S as heteroatom} [2013-01]
G02F 1/3615
. . . .
{containing polymers} [2013-01]
G02F 1/3616
. . . . .
{having the non-linear optical group in the main chain} [2013-01]
G02F 1/3617
. . . . .
{having the non-linear optical group in a side chain} [2013-01]
G02F 1/3618
. . . .
{Langmuir Blodgett Films} [2013-01]
G02F 1/3619
. . . .
{Organometallic compounds} [2013-01]
G02F 1/365
. .
in an optical waveguide structure (G02F 1/377, {G02F 1/395} take precedence) [2013-01]
G02F 1/37
. .
for second-harmonic generation {(G02F 1/3532 takes precedence)} [2013-01]
G02F 1/372
. . .
{Means for homogenizing the output beam} [2021-01]
G02F 1/374
. . .
{Cherenkov radiation} [2021-01]
G02F 1/377
. . .
in an optical waveguide structure [2013-01]
G02F 1/3775
. . . .
{with a periodic structure, e.g. domain inversion, for quasi-phase-matching [QPM] (G02F 1/383 takes precedence)} [2013-01]
G02F 1/383
. . . .
of the optical fibre type [2013-01]
G02F 1/39
. .
for parametric generation or amplification of light, infra-red or ultra-violet waves [2021-01]
G02F 1/392
. . .
{Parametric amplification} [2021-01]
G02F 1/395
. . .
{in optical waveguides} [2013-01]
G02F 1/397
. . .
{Amplification of light by wave mixing involving an interference pattern, e.g. using photorefractive material} [2013-01]
G02F 2/00
Demodulating light; Transferring the modulation of modulated light; Frequency-changing of light (G02F 1/35 takes precedence) [2020-02]
G02F 2/002
.
{using optical mixing} [2021-01]
G02F 2/004
.
{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} [2013-01]
G02F 2/006
. .
{All-optical wavelength conversion} [2021-01]
G02F 2/008
. .
{Opto-electronic wavelength conversion, i.e. involving photo-electric conversion of the first optical carrier} [2021-01]
G02F 2/02
.
Frequency-changing of light, e.g. by quantum counters [2020-02]
G02F 3/00
Optical logic elements; Optical bistable devices [2020-02]
G02F 3/02
.
Optical bistable devices [2013-01]
G02F 3/022
. .
{based on electro-, magneto- or acousto-optical elements (G02F 3/028 takes precedence)} [2013-01]
G02F 3/024
. .
{based on non-linear elements, e.g. non-linear Fabry-Perot cavity (G02F 3/028 takes precedence)} [2013-01]
G02F 3/026
. .
{based on laser effects} [2013-01]
G02F 3/028
. .
{based on self electro-optic effect devices [SEED]} [2013-01]
G02F 7/00
Optical analogue/digital converters [2013-01]
NOTE

  • This group covers only converters based in substantial manner on elements which are provided for in group G02F 1/00.
G02F 2201/00
Constructional arrangements not provided for in groups G02F 1/00 - G02F 7/00 [2016-05]
G02F 2201/02
.
fibre [2013-01]
G02F 2201/04
.
monomode [2013-01]
G02F 2201/05
.
multimode [2013-01]
G02F 2201/06
.
integrated waveguide [2013-01]
G02F 2201/063
. .
ridge; rib; strip loaded [2013-01]
G02F 2201/066
. .
channel; buried [2013-01]
G02F 2201/07
.
buffer layer [2013-01]
G02F 2201/08
.
light absorbing layer [2013-01]
G02F 2201/083
. .
infra-red absorbing [2013-01]
G02F 2201/086
. .
UV absorbing [2013-01]
G02F 2201/12
.
electrode [2013-01]
G02F 2201/121
. .
common or background [2013-01]
G02F 2201/122
. .
having a particular pattern [2013-01]
G02F 2201/123
. .
pixel [2013-01]
G02F 2201/124
. .
interdigital [2013-01]
G02F 2201/125
. .
delta-beta [2013-01]
G02F 2201/126
. .
push-pull [2013-01]
G02F 2201/127
. .
travelling wave [2013-01]
G02F 2201/128
. .
field shaping [2013-01]
G02F 2201/14
.
asymmetric [2013-01]
G02F 2201/15
.
periodic [2013-01]
G02F 2201/16
.
series; tandem [2013-01]
G02F 2201/17
.
Multi-pass arrangements, i.e. arrangements to pass light a plurality of times through the same element, e.g. by using an enhancement cavity [2013-01]
G02F 2201/18
.
parallel [2013-01]
G02F 2201/20
.
delay line [2013-01]
G02F 2201/205
. .
of fibre type [2013-01]
G02F 2201/30
.
grating [2013-01]
G02F 2201/302
. .
grating coupler [2013-01]
G02F 2201/305
. .
diffraction grating [2013-01]
G02F 2201/307
. .
Reflective grating, i.e. Bragg grating [2013-01]
G02F 2201/34
.
reflector [2013-01]
G02F 2201/343
. .
cholesteric liquid crystal reflector [2013-01]
G02F 2201/346
. .
distributed (Bragg) reflector [2013-01]
G02F 2201/36
.
Airflow channels, e.g. constructional arrangements facilitating the flow of air [2013-01]
G02F 2201/38
.
Anti-reflection arrangements [2013-01]
G02F 2201/40
.
Arrangements for improving the aperture ratio [2013-01]
G02F 2201/42
.
Arrangements for providing conduction through an insulating substrate [2013-01]
G02F 2201/44
.
Arrangements combining different electro-active layers, e.g. electrochromic, liquid crystal or electroluminescent layers [2013-01]
G02F 2201/46
.
Fixing elements [2013-01]
G02F 2201/465
. .
Snap -fit [2013-01]
G02F 2201/48
.
Flattening arrangements [2013-01]
G02F 2201/50
.
Protective arrangements [2013-01]
G02F 2201/501
. .
Blocking layers, e.g. against migration of ions [2013-01]
G02F 2201/503
. .
Arrangements improving the resistance to shock [2013-01]
G02F 2201/505
. .
Arrangements improving the resistance to acoustic resonance like noise [2013-01]
G02F 2201/506
. .
Repairing, e.g. with redundant arrangement against defective part [2013-01]
G02F 2201/508
. . .
Pseudo repairing, e.g. a defective part is brought into a condition in which it does not disturb the functioning of the device [2013-01]
G02F 2201/52
.
RGB geometrical arrangements [2013-01]
G02F 2201/54
.
Arrangements for reducing warping-twist [2013-01]
G02F 2201/56
.
Substrates having a particular shape, e.g. non-rectangular [2013-01]
G02F 2201/58
.
Arrangements comprising a monitoring photodetector [2013-01]
G02F 2202/00
Materials and properties [2013-01]
G02F 2202/01
.
dipole [2013-01]
G02F 2202/02
.
organic material [2013-01]
G02F 2202/021
. .
low molecular weight [2013-01]
G02F 2202/022
. .
polymeric [2013-01]
G02F 2202/023
. . .
curable [2013-01]
G02F 2202/025
. . . .
thermocurable [2013-01]
G02F 2202/026
. .
charge transfer complex [2013-01]
G02F 2202/027
. .
Langmuir-Blodgett film [2013-01]
G02F 2202/028
. .
photobleached [2013-01]
G02F 2202/04
.
dye [2013-01]
G02F 2202/043
. .
pleochroic [2013-01]
G02F 2202/046
. .
fluorescent [2013-01]
G02F 2202/06
.
dopant [2013-01]
G02F 2202/07
.
poled [2013-01]
G02F 2202/08
.
glass transition temperature [2013-01]
G02F 2202/09
.
inorganic glass [2013-01]
G02F 2202/10
.
semiconductor [2013-01]
G02F 2202/101
. .
Ga×As and alloy [2013-01]
G02F 2202/102
. .
In×P and alloy [2013-01]
G02F 2202/103
. .
a-Si [2013-01]
G02F 2202/104
. .
poly-Si [2013-01]
G02F 2202/105
. .
single crystal Si [2013-01]
G02F 2202/106
. .
Cd×Se or Cd×Te and alloys [2013-01]
G02F 2202/107
. .
Zn×S or Zn×Se and alloys [2013-01]
G02F 2202/108
. .
quantum wells [2013-01]
G02F 2202/12
.
photoconductor [2013-01]
G02F 2202/13
.
photorefractive [2013-01]
G02F 2202/14
.
photochromic [2013-01]
G02F 2202/16
.
conductive [2013-01]
G02F 2202/20
.
LiNbO3, LiTaO3 [2018-01]
G02F 2202/22
.
Antistatic materials or arrangements [2013-01]
G02F 2202/28
.
Adhesive materials or arrangements [2013-01]
G02F 2202/30
.
Metamaterials [2013-01]
G02F 2202/32
.
Photonic crystals [2013-01]
G02F 2202/34
.
Metal hydrides materials [2013-01]
G02F 2202/36
.
Micro- or nanomaterials [2017-08]
G02F 2202/38
.
Sol-gel materials [2013-01]
G02F 2202/40
.
Materials having a particular birefringence, retardation [2013-01]
G02F 2202/42
.
Materials having a particular dielectric constant [2013-01]
G02F 2203/00
Function characteristic [2013-01]
G02F 2203/01
.
transmissive [2013-01]
G02F 2203/02
.
reflective [2013-01]
G02F 2203/023
. .
total internal reflection [2013-01]
G02F 2203/026
. .
attenuated or frustated internal reflection [2013-01]
G02F 2203/03
.
scattering [2013-01]
G02F 2203/04
.
wavelength independent [2013-01]
G02F 2203/05
.
wavelength dependent [2013-01]
G02F 2203/055
. .
wavelength filtering [2013-01]
G02F 2203/06
.
Polarisation independent [2013-01]
G02F 2203/07
.
Polarisation dependent [2013-01]
G02F 2203/09
.
transflective [2013-01]
G02F 2203/10
.
plasmon [2013-01]
G02F 2203/11
.
involving infrared radiation [2013-01]
G02F 2203/12
.
spatial light modulator [2013-01]
G02F 2203/13
.
involving THZ radiation [2013-01]
G02F 2203/15
.
involving resonance effects, e.g. resonantly enhanced interaction [2013-01]
G02F 2203/16
.
involving spin polarization effects [2013-01]
G02F 2203/17
.
involving soliton waves [2013-01]
G02F 2203/18
.
adaptive optics, e.g. wavefront correction [2013-01]
G02F 2203/19
.
linearised modulation; reduction of harmonic distortions [2013-01]
G02F 2203/20
.
Intrinsic phase difference, i.e. optical bias, of an optical modulator; Methods for the pre-set thereof [2013-01]
G02F 2203/21
.
Thermal instability, i.e. DC drift, of an optical modulator; Arrangements or methods for the reduction thereof [2013-01]
G02F 2203/22
.
diffractive [2013-01]
G02F 2203/24
.
beam steering [2013-01]
G02F 2203/25
.
Frequency chirping of an optical modulator; Arrangements or methods for the pre-set or tuning thereof [2013-01]
G02F 2203/255
. .
Negative chirp [2013-01]
G02F 2203/26
.
Pulse shaping; Apparatus or methods therefor [2013-01]
G02F 2203/28
.
focussing or defocussing [2013-01]
G02F 2203/30
.
Gray scale [2013-01]
G02F 2203/34
.
Colour display without the use of colour mosaic filters [2013-01]
G02F 2203/48
.
Variable attenuator [2013-01]
G02F 2203/50
.
Phase-only modulation [2013-01]
G02F 2203/52
.
Optical limiters [2013-01]
G02F 2203/54
.
Optical pulse train (comb) synthesizer [2013-01]
G02F 2203/56
.
Frequency comb synthesizer [2013-01]
G02F 2203/58
.
Multi-wavelength, e.g. operation of the device at a plurality of wavelengths [2013-01]
G02F 2203/585
. .
Add/drop devices [2013-01]
G02F 2203/60
.
Temperature independent [2013-01]
G02F 2203/62
.
Switchable arrangements whereby the element being usually not switchable [2013-01]
G02F 2203/64
.
Normally black display, i.e. the off state being black [2013-01]
G02F 2203/66
.
Normally white display, i.e. the off state being white [2013-01]
G02F 2203/68
.
Green display, e.g. recycling, reduction of harmful substances [2013-01]
G02F 2203/69
.
Arrangements or methods for testing or calibrating a device [2013-01]
G02F 2203/70
.
Semiconductor optical amplifier [SOA] used in a device covered by G02F [2013-01]
G02F 2413/00
Indexing scheme related to G02F 1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position, orientation or value of the compensation plates [2013-01]
G02F 2413/01
.
Number of plates being 1 [2013-01]
G02F 2413/02
.
Number of plates being 2 [2013-01]
G02F 2413/03
.
Number of plates being 3 [2013-01]
G02F 2413/04
.
Number of plates greater than or equal to 4 [2013-01]
G02F 2413/05
.
Single plate on one side of the LC cell [2013-01]
G02F 2413/06
.
Two plates on one side of the LC cell [2013-01]
G02F 2413/07
.
All plates on one side of the LC cell [2013-01]
G02F 2413/08
.
with a particular optical axis orientation [2013-01]
G02F 2413/10
.
with refractive index ellipsoid inclined, or tilted, relative to the LC-layer surface O plate [2013-01]
G02F 2413/105
. .
with varying inclination in thickness direction, e.g. hybrid oriented discotic LC [2013-01]
G02F 2413/12
.
Biaxial compensators [2013-01]
G02F 2413/13
.
Positive birefingence [2013-01]
G02F 2413/14
.
Negative birefingence [2013-01]
G02F 2413/15
.
with twisted orientation, e.g. comprising helically oriented LC-molecules or a plurality of twisted birefringent sublayers [2013-01]