《FTLCD基本原理》PPT课件

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1、TFT-LCD基本原理与设计课程大纲TFT-LCD簡介液晶的光电特性TFTLCDsA/C架构TFTLCDs模組架构TFT-LCD驱动原理DrivingmethodDrivingwaveform电容效应TFT-LCD设计主动矩阵式液晶显示器AM-LCDsMonitorSystemLCDTimingControllerLCDPanelDataDriverScanDriverRGBDigitalDataGMA1~GMA181818PowerSupplyCircuitBacklightPowerSupplyBacklightR[5:0]G[5

2、:0]B[5:0]HsVsCLKDE+5VGNDData&ScanDriverPowerSupplyDataDriversControlSignalsPCInterfacePCRGBHsVsTFT-LCDModulePCGMA1~GMA184A/DInterfaceorDigitalInterfaceScanControlSignals主动矩阵式液晶显示器AM-LCDsPanelStructure主动矩阵式液晶显示器AM-LCDsPanelStructure主动矩阵式液晶显示器AM-LCDsPanelStructure主动矩阵式液晶显

3、示器AM-LCDsPanelStructureClcTFTSubstrateColorFilterSubstrateRGBClcClcRBG主动矩阵式液晶显示器AM-LCDsPanelStructureTN型LCDs显示原理TNModeLCDsFieldON入射光偏光板液晶分子玻璃基板出射光之极化状态解偏板出射光未加电场OFF状态TN&STN电光转移曲线V-TCurve100%90%10%VnsSTNVsSTNVsTNVnsTNVIn-Plane-SwitchModeLCDs偏光板解偏板液晶分子作用电极玻璃基板入射光作用电场方向出射光

4、之极化状态未加电场“OFF”状态施加电场“ON”状态出射光VerticalAlignmentModeLCDs未加电场OFF状态施加电场ON状态入射光偏光板液晶分子玻璃基板出射光之极化狀态解偏板出射光ComparisonofLCModesStronglydependentonviewingangle低驱动电压視角窄小Off(White)On(Black)Slightlydependentonviewingangle广视角液晶反应速度慢Off(Black)On(White)画面对比低画面品质差Slightlydependentonview

5、ingangle画面对比高广視角Off(Black)On(White)液晶反应速度快彩色画面显像佳TNIPSVA主动矩阵式液晶显示器AM-LCDsPanelStructureTFT-LCDModuleTTLLVDSPanelLinkSingalControllerDC/DCDirverICinvertorTFT-LCDBLX-PCDYPCBGammaGen.ComponentEMITFTCharacteristicId1020Vg10E-610E-1110E-12-5-10TFTLCDs等效电路RowDriversColumnDriv

6、er1H1HClcCsCsCsCsCsCsCsCsCsClcClcClcClcClcClcClcClcTimingChartofTFTLCDsFrameTimeGate123N1HL1L2L3DATATFTLCDsDrivingMethodColumnInversionDotInversionRowInversionFrameInversionDirectDrivingofTFTLCDsDCBiasofCommonGrayScaleVoltageV0V1V2V62V63V63V62V2V1V01Frame/1LineACModulat

7、ionAddressingofTFTLCDsV0V1V2V62V63V63V62V2V1V0CommonWaveformGraylevelVoltage1Frame/1LineTFTLCDs的电光效应DirectAddressingTFTLCDs的电光效应ACAddressingPixelStructureofTFTLCDsClcCsClcCsCommonCommon(N-1)thScanLine(N-1)thScanLineNthScanLineNthScanLineCsonCommonModeCsonGateModeCgdCgd液

8、晶电容儲存电容扫描电极资料电极共通电極MthDataLineMthDataLine资料电极扫描电极:Clc:Cs:Common:Cgd寄生电容液晶画素电容:Clc+CsCsonCommon与CsonGate液晶画素TFT