液晶显示器驱动IC原理和介绍

液晶顯示器驅動IC原理和介紹主講人:黃雲朋ContentI.液晶驅動原理介紹II.STNLCDDriverIntroductionIII.STNCaseStudyVI.TFTLCDDriverIntroductionV.TFTDriverICConsideration液晶驅動原理FieldOFFFieldONI.液晶驅動原理介紹FieldOFFFieldONTwistNematic(TN)STNTNDV1DV2PS:TNmoresuitableformoregraylevelsSTNforblack&whiteTN&STNV-TTransferCurveVTVsigVcVsVcVsVc-VsVsigONOFFONLCCellLCD靜態驅動法MobilePhoneMarketForecast01002003004005006002000200120022003STNMonoSTNColorLTPSColorMobilePhoneMsetsII.STNLCDDriverintroductionPDAKsets0200040006000800010000120002000200120022003STNMonoSTNColorSTNPDAMarketForecastSTNLCDDriverIntroductionCommonDriverSegmentDriverShiftRegisterDataLatchEI/OEO/ID0~D8DataLatchLPOutputStageV1~V4ToSTNsegmeDclkShiftRegisterEI/OEO/IOutputStageVEEVssToSTNCommonDclkSTNCommonDriverSTNSegmentDriverSTNLCDDriverBlockLine1Line2Line3CommonSignalSegmentSignalColumn1Column2Column1Column2F+DF+DF-D-D+D-D+D-D+DSTNLCDDrivingwaveformON=(F+D)+(N-1)DN22OFF=(F-D)+(N-1)DN22SR=ONOFFFD=NSR=N+1N-11.11.01.21.3100200NBiasSR21:22.2341:31.7381:41.45161:51.29321:71.2641:91.151001:111.111281:121.092001:151.082401:161.064001:171.06LimitationonSTNLCDResolutionF0D-D-FF+D-DD-(F+D)F+DDF02D0F+DF-DF+D-(F+D)D-DCommonSegementLCDpixelSTNLCDDrivingMethodAPTIAPTColoronSTNLCD-FRCFrameratecontrol=====Time4/43/42/41/40/4ColoronSTNLCD-PWMCommonSegmentPixelPulseWidthModulationVerticalCrosstalkofSTNLCDsMCommonABApixelBpixelABReduceVerticalCrosstalkofSTNLCDsMCommonABApixelBpixelMCommonABApixelBpixelHorizontalCrosstalkofSTNLCDsABSEGLLineCommonPixelWaveformABLSEGDriversCOMDriversComOutputStatusselectcircuitDisplaydatalatchcircuitDisplaydataRAM132x65LineaddresscircuitI/ObufferPageaddresscircuitColumnaddresscircuitDisplayTiminggenerationcircuitCMOSOSCStatusBusholderCommanddecoderPowerSupplyCircuitMPUinterfaceVssVDDV1V2V3V4CAP1+CAP1-CAP2+CAP2-CAP3+COUTSEG0~SEG131COM0~COM63EpsonSED1565BlockDiagramEpsonVoltageReferenceBlockVddV5Vout(fromchargepump)V1V4V3V2VddToSegment&CommonEpsonOSCBlockV=VTn+VTpPowerforOSC1024x768260KLCDpanelWFP2373GateDriverSourceDriverSourceDriver258WFP2373GateDriver258LCDControlASICReferencegeneratorOrfromNotebookLVDSLCDController(PanelLinkOrADC)fromDesktopPCVI.TFTLCDBlockDiagramTFTLCDMarketForecastMsets0510152025303540452000200120022003LDMonitorNotebookLCDTVNumberofDriversRequiredGateDriverOutputFormatVGASVGAXGASXGAUGA120/128456810150/154458192/200346256/25834No.ofDriversRequiredSourceDriverOutputFormatVGASVGAXGASXGAUGA2408101620300/309103845810402612No.ofDriversRequiredVGA640X480SVGA800X600XGA1024X768SXGA1280X1024UGA1600X1200TFTLCDPanelStructurePCBLSIGlassSubstrate(TFTLCD)TCPCopper-foilleadlineSolderingAnisotropicConductingfilmGoldbumpGateelectrodeconductinglineSourceelectrodeconductinglineSealantTFTLiquidcrystalSourceDriverGateDriverClcdCstoreTFTLCDsPixelSchematicTFTLCDDriverIntroductionSourceBusGateBusCstore123451+++++2+++++3+++++4+++++5+++++FrameNColumnsRows123451-----2-----3-----4-----5-----FrameN+1ColumnsRows123451+++++2-----3+++++4-----5+++++FrameNColumnsRows123451+++++2-----3+++++4-----5+++++FrameN+1ColumnsRows123451+-+-+2+-+-+3+-+-+4+-+-+5+-+-+FrameNColumnsRows123451-+-+-2-+-+-3-+-+-4-+-+-5-+-+-FrameN+1ColumnsRows123451+-+-+2-+-+-3+-+-+4-+-+-5+-+-+FrameNColumnsRows123451-+-+-2+-+-+3-+-+-4+-+-+5-+-+-FrameN+1ColumnsRowsFrameInversionRowInversionColumnInversionDotInversionTFTLCDDrivingMethod2004006008001000RowColumnPixel(Old)Pixel(New)InversionMethodPdmW/SystemSVGAPowerduetoColumnDrivingFunction258bitsbidirectionshiftregisterDecoderOutputBufferDI/O1DO/I1CLKU/DXDOFFVEE1VEE2OUT0OUT257OUT2258bitsbidirectionshiftregisterDI/O2DO/I2XDONOENVDDGateDriverBlockDiagramVDDVCCVSSVEE2VEE1CLKDI/O2XDONXDOFFOUT0OUT1OUT2OUT3OUT4OUT5OUT6DI/O1OUT256OUT257123453LevelGateDriverTimingDiagramGatebusCgdVGate-CellCross-CouplingV=CgdCsClcCgd+Clc+Cs*VgateCgdCsonGateCell&ThreeLevelGateDriverCgdGate(n-1)Gate(n)DataDataV1V2CsClcV=Cgd*Cgd+Clc+CsV1-Cs*V2Cgd*V1=Cs*V264bitsbidirectionshiftregister384bytesdataregisterSynchronouslatchD/AconverterOutputBufferDI/ODO/ICLKU/DINVD00to07D10to17D20to27D30to37D40to47D50to57LOADPOLV0toV9VDD1VSS1VDD2VSS2OUT1OUT384OUT2SourceDriverBlockDiagramCLKDI/ODO/ID00~D57LOADPOLOUT1~OUT384PresettomiddlelevelFirstdataLastdataNextfirstdataSourceDriverTimingDiagramVcomV6V5V4V3V2V1V0V0V1V2V3V4V5V6GarylevelonelineDirectDrivingofTFTLCDsGateSignalVcomV6V5V4V3V2V1V0V0V1V2V3V4V5V6V7V7ACModulationDrivingofTFTLCDsGatePulsetransmissionDelayNTFTPanelGateLineRCmodelHorizontalCrosstalkofTFTLCDs(1)ABABVcomEffectiveVcomHorizontalCrosstalkofTFTLCDs(2)ABABVcomEffectiveVcomVerticalCrosstalkofSTNLCDsPixelGateLineSourceLineFrame/LineInversionChargingPathCgdCsClcGateDriverN-1GateDriverNSourceDriverN-1CgdCsClcSourceDriverNCgdCsClcSourceDriverN+1CommonPlateColumn/DotInversionChargingPathCgdCsClcGateDriverN-1GateDriverNSourceDriverN-1CgdCsClcSourceDriverNCgdCsClcSourceDriverN+1CommonPlateComparisonofAddressingMethodFrameInversionRowInversionColumnInversionDotInversionVcomACModulationACModulationDCDCOutputVoltageLowLowHighHighPowerconsumptionLowHighLowHighImageQualityPoorHorizontalCrosstalkVerticalCrosstalkGoodShiftRegisterVi