| ReturnTo Theme-Group-Choice | Onelevelup |
| 2H193 | LIQUID CRYSTAL 6 (DRIVE) | |
| G02F1/133 ,505-1/133,535;1/133,545-1/133,580 | ||
| G02F1/133,505-535;545-580 | ZA | ZA00 STRUCTURE OF DISPLAY AREA |
ZA01 | ZA02 | ZA03 | ZA04 | ZA05 | ZA06 | ZA07 | ZA08 | ZA09 | |
| . Active matrix structures | . . Three-terminal elements | . . . Single crystal metal oxide semiconductor field effect transistors (MOSFET) or silicon on sapphire (SOS) | . . . Thin-film transistors (TFT) | . . . Auxiliary capacitances (Cs) | . . . . Cs on-gate systems | . . . . Independent Cs systems | . . . Wiring structures of three-terminal elements | . . . Common electrodes being divided | ||||
| ZA12 | ZA13 | ZA14 | ZA15 | ZA19 | ZA20 | |||||||
| . . Two-terminal elements | . . . Metal-insulator-metal (MIM) or thin-film-diode (TFD) | . . . Diode rings (DR) or back-to-back diodes (BTBD) | . . . Wiring structures of two-terminal elements | . . A plurality of active elements in each picture element other than redundancy | . . . different in polarity | |||||||
| ZA21 | ZA22 | ZA27 | ||||||||||
| . Simple matrix structures | . . Wiring structures of simple matrices | . Icons segments or bar-graphs | ||||||||||
| ZA31 | ZA32 | ZA33 | ZA34 | ZA36 | ZA37 | ZA38 | ZA39 | |||||
| . Special display structures | . . Divided matrix structures | . . . divided vertically | . . . divided horizontally | . . Stacked liquid crystal panels | . . . Two layers | . . . Three layers | . . . Four or more layers | |||||
| ZA42 | ZA44 | ZA46 | ZA48 | |||||||||
| . . A plurality of liquid crystal display panels on the same plane | . . Curved display | . . Transreflective types | . . Double sided display | |||||||||
| ZB | ZB00 DRIVE METHOD 1 (DRIVE WAVEFORM OF LIQUID CRYSTAL) |
ZB01 | ZB02 | ZB03 | ZB05 | ZB06 | ZB07 | ZB08 | ZB09 | |||
| . Drive waveforms of three-terminal elements | . . Application waveforms of scanning lines | . . Application waveforms of data signal lines | . . Application waveforms of common electrodes Vcom | . . . Constant in common potential | . . . Changes in common potential | . . . . 1H common reversal | . . . . One frame-common reversal | |||||
| ZB12 | ZB13 | ZB14 | ZB16 | ZB18 | ||||||||
| . . Application waveforms of auxiliary capacitance lines (Cs) | . . . Constant in potential of Cs | . . . Changes in potential of Cs | . . Drive waveforms of liquid crystal layers | . . Punch-through voltage compensation of TFT | ||||||||
| ZB21 | ZB22 | ZB23 | ZB24 | ZB30 | ||||||||
| . Two-terminal element type drive waveforms | . . Application waveforms of scanning lines | . . Application waveforms of data signal lines | . . Drive waveforms of liquid crystal layers | . Other active type drive waveforms | ||||||||
| ZB31 | ZB32 | ZB33 | ZB34 | |||||||||
| . Simple matrix type drive waveforms | . . Application waveforms of scanning electrodes | . . Application waveforms of signal electrodes | . . Drive waveforms of liquid crystal layers | |||||||||
| ZB41 | ZB42 | ZB43 | ZB44 | ZB46 | ZB50 | |||||||
| . Driving principle of simple matrix | . . Multiplex drive | . . . Voltage averaging methods | . . . . Optimum bias methods | . . MLA i.e. orthogonal functions | . . Other driving principles | |||||||
| ZB51 | ZB53 | ZB58 | ||||||||||
| . Static drive | . Two-frequency drive | . Thermal writing process | ||||||||||
| ZC | ZC00 DRIVE METHOD 2 (POLARITY REVERSAL OR SCANNING METHOD OF LIQUID CRYSTAL) |
ZC01 | ZC02 | ZC03 | ZC04 | ZC05 | ZC06 | ZC07 | ZC08 | |||
| . Polarity reversal | . . Line reversal drive | . . . H line reversal | . . . . 1H line reversal | . . . . nH lines reversal (*) | . . . V line reversal | . . . . 1V line reversal | . . . . nV lines reversal (*) | |||||
| ZC12 | ZC13 | ZC14 | ZC15 | ZC16 | ZC17 | ZC19 | ZC20 | |||||
| . . Dot reversal drive | . . . 1X1 dot reversal | . . . mXn dots reversal (*) | . . Frame reversal drive | . . . One frame reversal | . . . n flames reversal (*) | . . Random reversal drive | . . Other methods of polarity reversal | |||||
| ZC21 | ZC22 | ZC23 | ZC24 | ZC25 | ZC26 | ZC27 | ZC28 | ZC30 | ||||
| . Scanning methods | . . Point sequential scan | . . Block sequential scan | . . Line sequential scan | . . . Progressive | . . . Interlaced | . . . Partial rewriting | . . . Random scanning | . . Scanning in opposite directions | ||||
| ZC32 | ZC34 | ZC35 | ZC36 | ZC39 | ||||||||
| . . Scanning of partial display | . . Overlapping scanning | . . Multi-scanning other than MLA | . . Interval scanning | . . A plurality of screen scanning in one frame | ||||||||
| ZD | ZD00 DRIVE METHOD 3 (COLOUR, GRADATION OR FUNCTION) |
ZD01 | ZD02 | |||||||||
| . Normally white systems | . Normally black systems | |||||||||||
| ZD11 | ZD12 | ZD13 | ZD14 | ZD15 | ZD16 | ZD17 | ||||||
| . Colour display | . . Colour filter systems | . . . Stripe shape | . . . Matrix shape | . . . One colour or two colours | . . . Four or more colour | . . . containing white colour or transparent areas or picture elements | ||||||
| ZD21 | ZD22 | ZD23 | ZD24 | ZD25 | ZD26 | ZD27 | ZD29 | ZD30 | ||||
| . Gradation display | . . Principles of gradation display | . . . Amplitude gradations | . . . Area gradations | . . . Frame gradations | . . . Pulse width gradations | . . . Combination of a plurality of gradation methods | . . Weighting gradations | . . . Factorials of two | ||||
| ZD31 | ZD32 | ZD33 | ZD34 | ZD36 | ZD37 | ZD38 | ZD39 | ZD40 | ||||
| . Purposes or functions of the invention | . . Uniformity of luminance | . . Non-uniformity of luminance | . . Uniformity of contrast | . Switching display | . . Conversion of resolutions | . . Vertical or horizontal reversing of display or rotation of display | . . Variable control of view angle ranges | . . Variable control of view angle directions | ||||
| ZE | ZE00 DRIVE METHOD 4 (OTHERS) |
ZE01 | ZE02 | ZE03 | ZE04 | ZE06 | ZE08 | ZE09 | ZE10 | |||
| . Overdrive drive | . Black insertion | . Control of frame frequencies | . . Double speed drive | . Precharge drive | . Drive during blanking periods | . . Horizontal blanking periods | . . Vertical blanking periods | |||||
| ZE11 | ZE15 | ZE16 | ZE17 | ZE18 | ZE20 | |||||||
| . Prevention drive of OCB reverse transition | . Drive of liquid crystals with memory characteristics | . . Drive of ferroelectric liquid crystals | . . Drive of antiferroelectric liquid crystals | . . Drive of bistable cholesterics | . . Reset drive of liquid crystals with memory characteristics | |||||||
| ZE21 | ZE23 | ZE26 | ||||||||||
| . Reset drive of liquid crystals without memory characteristics | . Transreflective drive | . Processing with mechanical opening and closing or angle changes | ||||||||||
| ZE31 | ZE32 | ZE33 | ZE34 | ZE35 | ZE37 | ZE38 | ZE40 | |||||
| . Drive in irregular stages | . . Drive during power-on | . . . Drive of liquid crystal panels | . . . . Transition of OCB | . . . Drive of light sources | . . Sleep modes | . . Drive during power-off | . Others (*) | |||||
| ZF | ZF00 CIRCUIT 1 (FOR DRIVE OF LIQUID CRYSTAL) |
ZF01 | ZF02 | ZF03 | ZF04 | ZF05 | ZF06 | ZF07 | ZF09 | |||
| . Power supply circuits | . . Voltage control | . . . Generation of a plurality of voltage levels | . . . . Divided resistances | . . . . Gradation voltage generating circuits | . . . DC converters | . . . . Charge pump systems | . . Battery systems | |||||
| ZF11 | ZF12 | ZF13 | ZF14 | ZF15 | ZF16 | ZF17 | ZF18 | ZF19 | ZF20 | |||
| . Processing circuits of picture signals | . . Converting or correcting picture signals | . . . Gamma correction | . . . Processing colour signals | . . . . Colour balance adjustment | . . Frame memory | . . Look-up tables (LUT) | . . Digital/analogue conversion | . . Expansion or compression of picture data | . . Serial/parallel conversion or phase expansion | |||
| ZF21 | ZF22 | ZF23 | ZF24 | |||||||||
| . Scanning side drive circuits | . . Connections with scanning lines | . . Internal structures of scanning side drive circuits | . . Scanning side drive circuits divided into counter arrangement | |||||||||
| ZF31 | ZF32 | ZF33 | ZF34 | ZF35 | ZF36 | ZF37 | ||||||
| . Data side drive circuits | . . characterised by shift registers | . . characterised by latches | . . Digital to analogue conversion (DAC) | . . Output buffers | . . Connections between data signal lines | . . Data side drive circuits divided into counter arrangement | ||||||
| ZF41 | ZF42 | ZF43 | ZF44 | ZF45 | ZF46 | |||||||
| . Input methods of drive signals into liquid crystal panels | . . Tape Automated Bonding (TAB) | . . COG (Chip On Glass) | . . Integrated driving circuits e.g. polysilicon | . . SOG (Systems On Glass) | . . Combined signal input methods | |||||||
| ZF51 | ZF52 | ZF59 | ZF60 | |||||||||
| . Layout of supply wiring of clocks or power sources | . Layouts of supply wiring of picture signals | . Drive circuits of TFT common electrodes | . Driving circuits of TFT auxiliary capacitance lines | |||||||||
| ZG | ZG00 CIRCUIT 2 (LIGHTING UNIT) |
ZG01 | ZG02 | ZG03 | ZG04 | ZG05 | ||||||
| . Arrangement of light sources | . . Backlights | . . . Direct under type backlights | . . . Side lighting type backlights | . . Frontlights | ||||||||
| ZG11 | ZG12 | ZG13 | ZG14 | ZG15 | ZG16 | ZG17 | ||||||
| . Types of light sources | . . Fluorescent lamps | . . . Planar fluorescent lamps | . . Light-emitting diodes (LED) | . . Electroluminescence | . . Lamps e.g. point-like | . . Combination of multiple types of light sources | ||||||
| ZG21 | ZG22 | ZG23 | ZG25 | ZG26 | ZG27 | ZG28 | ||||||
| . Colours of light sources | . . Light sources with only one colour | . . . Control of a plurality of light sources | . . Light sources with a plurality of colours | . . . Two colours | . . . Three colours | . . . Four or more colours | ||||||
| ZG32 | ZG33 | ZG34 | ZG35 | |||||||||
| . . . Means for selection or colour development of a plurality of colours | . . . . Colour wheel systems | . . . . Time division systems of light source colours not covered by ZG33 | . . . . Simultaneous lighting of a plurality of colours | |||||||||
| ZG41 | ZG43 | ZG44 | ZG45 | ZG46 | ZG48 | ZG50 | ||||||
| . Luminance control of lighting units | . . Dividing systems of lighting areas | . . . Sequential lighting of a plurality of blocks | . . Blink backlight systems of simultaneous irradiation | . . Scanning of illumination light e.g. polygon mirrors | . . Variable luminance of light sources according to contents of pictures | . . Pulse Width Modulation (PWM) or duty ratios | ||||||
| ZG51 | ZG52 | ZG53 | ZG56 | ZG57 | ZG58 | ZG60 | ||||||
| . Reduction in uneven luminance | . Reduction in uneven chromaticity | . Colour balance adjustment of light sources | . Power supply circuits of light sources e.g. inverters | . Time lag between liquid crystal panels and light sources | . Automatically lighting on or off light sources | . Other lighting circuits | ||||||
| ZH | ZH00 CIRCUIT 3 (DETECTION OR COMPENSATION CIRCUIT) |
ZH01 | ZH02 | ZH03 | ZH04 | ZH05 | ZH06 | ZH07 | ZH08 | ZH09 | ZH10 | |
| . Detection circuits | . . Detection of light | . . . Types of light detection | . . . . Luminance | . . . . Chrominance | . . . Objects of light detection | . . . . External light | . . . . Illumination light | . . . . Transmitted light of liquid crystal panels | . . . . Luminance on screens | |||
| ZH11 | ZH12 | ZH13 | ZH14 | ZH15 | ZH17 | ZH18 | ZH19 | ZH20 | ||||
| . . . Positions of optical sensors | . . . . closely contacted or built into liquid crystal panels | . . . . . positioned in display areas | . . . . . positioned in frame areas | . . . . positioned outside of liquid crystal panels | . . Detection of temperature | . . . Temperature of liquid crystal panels | . . . Temperature of polarising elements | . . . Temperature of light sources | ||||
| ZH21 | ZH22 | ZH23 | ZH24 | ZH25 | ZH26 | ZH27 | ZH29 | ZH30 | ||||
| . . Detection of voltage or current | . . . Power source voltage | . . . Picture signals | . . . Voltage or current of scanning lines | . . . Voltage or current of data signal lines | . . . Voltage or current of TFT common | . . . Voltage or current of light sources | . . Time detection | . . Other detection | ||||
| ZH31 | ZH32 | ZH33 | ZH34 | ZH35 | ZH37 | ZH38 | ZH39 | ZH40 | ||||
| . Compensation circuits | . . Causes requiring compensation | . . . Variations in temperature | . . . . Compensation at high temperature | . . . . Compensation at low temperature | . . . Variations in ambient light e.g. luminance | . . . Variations in voltage or current | . . . Directions of observers | . . . caused by liquid crystal device components | ||||
| ZH41 | ZH42 | ZH43 | ZH44 | ZH45 | ZH46 | ZH49 | ZH50 | |||||
| . . . . View angle characteristics of liquid crystals | . . . . Variations during manufacturing liquid crystal devices | . . . . Characteristics of optical elements | . . . . Electrical properties | . . . . . Active elements | . . . . . Wiring resistance | . . . Changes with time | . . . . Failures | |||||
| ZH51 | ZH52 | ZH53 | ZH54 | ZH56 | ZH57 | ZH58 | ||||||
| . . Means of compensation | . . . Compensation by drive signals of liquid crystals | . . . . Voltage values | . . . . Frequency or pulse width | . . . Compensation by light source control | . . . . Luminance of light sources | . . . . Colour balance of light sources | ||||||
| ZH61 | ZH62 | ZH63 | ZH64 | ZH65 | ZH66 | ZH68 | ZH69 | ZH70 | ||||
| . . . Compensation by heating | . . . . heating of liquid crystals | . . . . heating of light sources | . . . . heating methods | . . . . . Heaters | . . . . . Peltier elements | . . . Compensation by cooling | . . . . Cooling of liquid crystal panels | . . . . Cooling of light sources | ||||
| ZH71 | ZH72 | ZH73 | ZH74 | ZH75 | ZH79 | |||||||
| . . . . Cooling methods | . . . . . Peltier or cooling elements | . . . . . Heat discharge plates or radiators | . . . . . Cooling or forced cooling or fans | . . . . . Liquid cooling or water cooling | . . . Other compensating means | |||||||
| ZJ | ZJ00 CIRCUIT 4 (OTHERS) |
ZJ01 | ZJ02 | ZJ03 | ZJ04 | |||||||
| . Information input functions | . . Touch-screen types | . . Light pen types | . . Image sensors built into liquid crystal panels | |||||||||
| ZJ11 | ZJ13 | ZJ14 | ZJ20 | |||||||||
| . Structures of countermeasures against noises e.g. electromagnetic shields | . Protective circuits | . . Emergency stop or protection in emergencies | . Others (*) | |||||||||
| ZK | ZK00 INSPECTION, REDUNDANT CONFIGURATION OR REPAIR OF DEFECTS |
ZK01 | ZK02 | ZK03 | ZK05 | ZK06 | ZK08 | ZK09 | ||||
| . Inspection | . . Inspection of liquid crystal panels | . . . Inspection circuits on TFT liquid crystal substrates or liquid crystal substrates | . . Inspection of lighting units | . . Inspection of drive circuits | . . Inspection of liquid crystal panels before assembling | . . Inspection of liquid crystal panels after assembling | ||||||
| ZK12 | ZK13 | ZK14 | ZK16 | ZK17 | ZK18 | |||||||
| . . Inspection procedures | . . . Optical detection | . . . Electric detection | . . Detection signals | . . . Display patterns of inspection | . . . Halftone | |||||||
| ZK21 | ZK22 | ZK23 | ZK24 | ZK25 | ZK27 | ZK28 | ZK29 | ZK30 | ||||
| . Redundant configuration | . . Redundant configuration in liquid crystal panels | . . . A plurality of active elements i.e. redundancy in each picture element | . . Redundant configurations of lighting units | . . Redundant configurations of drive circuits | . Repair of defects | . . Repair of liquid crystal panels | . . Repair of lighting units | . . Repair of drive circuits | ||||
| ZP | ZP00 ASSOCIATION WITH OTHER COMPONENTS |
ZP01 | ZP02 | ZP03 | ZP04 | ZP05 | ||||||
| . Substrates | . Insulating layers | . Conductors or electrodes | . Alignment films | . Photoconducting layers | ||||||||
| ZP11 | ZP12 | ZP13 | ZP14 | ZP15 | ZP16 | ZP17 | ZP20 | |||||
| . Optical elements | . . Wavelength selection elements other than colour filters | . . Light shielding layers Black Matrices (BM) or light-absorbing layers | . . Phase plates e.g. phase compensation plates | . . Polarisers or polarisation layers | . . Reflectors reflective layers or reflection electrodes | . . Diffusing plates or diffusion layers | . Others | |||||
| ZQ | ZQ00 PRINCIPLE OF OPERATION OF LIQUID CRYSTAL |
ZQ01 | ZQ02 | ZQ04 | ZQ05 | ZQ06 | ZQ07 | ZQ08 | ZQ09 | ZQ10 | ||
| . Electric current effect types | . . Dynamic scattering (DSM) types | . Electric field effect types | . . Dielectric anisotropy types | . . . Twisted nematic (TN) types | . . . Dichroic pleochroic or guest host (GH) types | . . . Electrically controlled birefringence (ECB) types | . . . Super twisted nematic (STN) types | . . . Phase change (PC) types | ||||
| ZQ11 | ZQ12 | ZQ13 | ZQ14 | ZQ15 | ZQ16 | ZQ17 | ZQ18 | ZQ19 | ZQ20 | |||
| . . . Vertical alignment (VA) types | . . . Homogeneous alignment types | . . . Polymer dispersion types (PDLC) | . . . Optically Compensated Bend (OCB) or bend alignment | . . . Hybrid aligned nematic (HAN) types | . . . Lateral field drive types | . . . Selective reflection of cholesteric liquid crystals | . . . . Polarisation selectivity | . . . . Wavelength selectivity | . . . Bistable nematic (BTN) types | |||
| ZQ21 | ZQ22 | ZQ23 | ZQ24 | ZQ25 | ZQ26 | ZQ28 | ZQ30 | |||||
| . . Permanent dipole types | . . . Ferroelectric liquid crystals (FLC) | . . . . Forming helices parallel to substrate surface in initial alignment | . . . . Surface stabilised ferroelectric liquid crystals (SSFLC) | . . . . one side V-shaped or monostable | . . . Antiferroelectric liquid crystals (AFLC) | . Thermal effect types | . Optical effect types | |||||
| ZQ31 | ZQ32 | ZQ33 | ||||||||||
| . Other principles of operation (*) | . . Pressure effect types | . . Magnetic field effect types | ||||||||||
| ZQ41 | ZQ42 | ZQ43 | ZQ44 | ZQ45 | ZQ46 | ZQ47 | ZQ48 | |||||
| . Adding to principles of operations | . . Means for dividing operation | . . . with alignment films | . . . by electrode structures | . . . by projections or recesses | . . Arrangement for dividing operations | . . . in picture elements | . . . for each picture element | |||||
| ZR | ZR00 SPECIAL USE |
ZR01 | ZR02 | ZR03 | ZR04 | ZR06 | ZR07 | ZR09 | ZR10 | |||
| . Display elements | . . Projectors (*) | . . . Single plate type liquid crystal panels | . . . Three-plate type liquid crystal panels | . . for vehicles | . . . for car navigation | . . Dual view | . . Three-dimensional displays | |||||
| ZR12 | ZR16 | ZR17 | ZR18 | ZR20 | ||||||||
| . . Electronic papers or electronic books | . Light control elements | . . Optical disc heads | . . Light modulating windows | . Others (*) |