LCD-TFT基本原理與設(shè)計(jì)

TFT-LCD基本原理與設(shè)計(jì)

課程大綱

TFT-LCD產(chǎn)業(yè)

TFT-LCD簡介

TFT-LCD驅(qū)動原理

TFT-LCD設(shè)計(jì)TFT-LCD產(chǎn)業(yè)TFT-LCD產(chǎn)業(yè)TFT-LCD基本原理與設(shè)計(jì)

課程大綱

TFT-LCD產(chǎn)業(yè)

TFT-LCD簡介液晶的光電特性

TFTLCDsA/C架構(gòu)

TFTLCDs模組架構(gòu)

TFT-LCD驅(qū)動原理

TFT-LCD設(shè)計(jì)主動矩陣式液晶顯示器

AM-LCDsMonitorSystemLCDTimingControllerLCDPanelDataDriverScanDriverRGBDigitalDataGMA1~GMA181818PowerSupplyCircuitBacklightPowerSupplyBacklightR[5:0]G[5:0]B[5:0]HsVsCLKDE+5VGNDData&ScanDriverPowerSupplyDataDriversControlSignalsPCInterfacePCRGBHsVsTFT-LCDModulePCGMA1~GMA184A/DInterfaceorDigitalInterfaceScanControlSignals主動矩陣式液晶顯示器

AM-LCDsPanelStructure主動矩陣式液晶顯示器

AM-LCDsPanelStructure主動矩陣式液晶顯示器

AM-LCDsPanelStructure液晶物質(zhì)的相變化固體結(jié)晶液晶液體加熱加熱冷卻冷卻液晶分子的種類SmecticLC層狀液晶NematicLC線狀液晶CholestericLC膽固醇狀液晶液晶物質(zhì)主動矩陣式液晶顯示器

AM-LCDsPanelStructureClcTFTSubstrateColorFilterSubstrateRGBClcClcRBG主動矩陣式液晶顯示器

AM-LCDsPanelStructureTN型

LCDs顯示原理TNModeLCDsFieldON入射光偏光板液晶分子玻璃基板出射光之極化狀態(tài)解偏板出射光未加電場OFF狀態(tài)TN&STN電光轉(zhuǎn)移曲線V-TCurve100%90%10%VnsSTN

VsSTNVsTNVnsTNVIn-Plane-SwitchModeLCDs偏光版解偏版液晶分子作用電極玻璃基板入射光作用電場方向出射光之極化狀態(tài)未加電場"OFF"狀態(tài)施加電場"ON"狀態(tài)出射光VerticalAlignmentModeLCDs未加電場OFF狀態(tài)施加電場ON狀態(tài)入射光偏光板液晶分子玻璃基板出射光之極化狀態(tài)解偏板出射光ComparisonofLCModesStronglydependentonviewingangle低驅(qū)動電壓視角窄小Off(White)On(Black)Slightlydependentonviewingangle廣視角液晶反應(yīng)速度慢Off(Black)On(White)畫面對比低畫面品質(zhì)差Slightlydependentonviewingangle畫面對比高廣視角Off(Black)On(White)液晶反應(yīng)速度快彩色畫面顯像佳TNIPSVA主動矩陣式液晶顯示器

AM-LCDsPanelStructureTFT-LCDModuleTTLLVDSPanelLinkSingalControllerDC/DCDirverICinvertorTFT-LCDBLX-PCDYPCBGammaGen.ComponentEMITFT-LCD基本原理與設(shè)計(jì)

課程大綱

TFT-LCD產(chǎn)業(yè)

TFT-LCD簡介

TFT-LCD驅(qū)動原理

DrivingmethodDrivingwaveform

電容效應(yīng)

TFT-LCD設(shè)計(jì)TFTCharacteristicId1020Vg10E-610E-1110E-12-5-10TFTLCDs等效電路RowDriversColumnDriver1H1HClcCsCsCsCsCsCsCsCsCsClcClcClcClcClcClcClcClcTimingChartofTFTLCDsFrameTimeGate123N1HL1L2L3DATATFTLCDsDrivingMethodColumnInversionDotInversionRowInversionFrameInversionDirectDrivingofTFTLCDs

DCBiasofCommonGrayScaleVoltageV0V1V2V62V63V63V62V2V1V01Frame/1LineACModulationAddressingofTFTLCDsV0V1V2V62V63V63V62V2V1V0CommonWaveformGraylevelVoltage1Frame/1LineTFTLCDs的電光效應(yīng)

DirectAddressingTFTLCDs的電光效應(yīng)

ACAddressingPixelStructureofTFTLCDsClcCsClcCsCommonCommon(N-1)thScanLine(N-1)thScanLineNthScan

LineNthScan

LineCsonCommonModeCsonGateModeCgdCgd液晶電容儲存電容掃描電極資料電極共通電極MthDataLineMthDataLine資料電極掃描電極:Clc:Cs:Common:Cgd寄生電容液晶畫素電容:Clc+CsCsonCommon與CsonGate液晶畫素TFTGateLineDataLineCsCs液晶畫素TFTCommonCommonGateLineDataLineCsCs

CsonCommonCsonGateTFTLCDsDrivingWaveform

CsonCommon(一)TFTLCD驅(qū)動波形(CsonCommon,Common=DCBias)TFTLCDsDrivingWaveform

CsonCommon(二)TFTLCDsDrivingWaveform

CsonGateTFT電容效應(yīng)的影響PixelCgdCgsCsdCsdbCsdb二階驅(qū)動方式的效應(yīng)CsClcCgdCsdCgsVctCh(N-1)Ch(N)Vs垂直影像訊號水平掃描訊號Vg水平掃描訊號VgVshVslVstVthVth正極性驅(qū)動負(fù)極性驅(qū)動負(fù)極性驅(qū)動正極性驅(qū)動資料驅(qū)動晶片輸出訊號電位液晶畫素電位Vct=Vst-ΔVpΔVpBlack(+)White(+)White(+)Black(+)Black(-)Black(-)White(-)White(-)TFT補(bǔ)償驅(qū)動法Ch(N-1)Ch(N)Vst=Vct影像訊號波形Vs水平脈波掃描波形VgeVgeVghl3LevelAddressing3LevelAddressingB(+)W(-)B(-)W(+)正極性負(fù)極性Vst=VctB(+)B(-)W(+)W(-)B(+)W(-)B(-)W(+)ΔVp=CgdVghl/Ct正極性負(fù)極性正極性Ct=Cs+Clc+Cgd負(fù)極性CsVge/CtCsVge/CtTFT-LCD基本原理與設(shè)計(jì)

課程大綱

TFT-LCD產(chǎn)業(yè)

TFT-LCD簡介

TFT-LCD驅(qū)動原理

TFT-LCD設(shè)計(jì)TFT-LCDModule設(shè)計(jì)(一)訂定TFT-LCDModuleSpec--Resolution/Power/Dimension.VideoSignalFormat/ScanLinePeriod(Hs)/FramePeriod(Vs)TFT的ION/IOFF電流

ION必須於一條水平掃描線時間將影像電壓充入液晶電容(Clc)IOFF必須使充入液晶電容中的影像電壓維持一個Frame的時間直流漂移(DCOffset)當(dāng)ScanLine上GatePule關(guān)閉時,透過雜散電容(Cgd,Cgs,Cds),對畫素電極(PixelElectrode)所造成的Feedthrough效應(yīng).TFT-LCDModule設(shè)計(jì)(二)水平掃描脈線的RC時間常數(shù)高解析度時,必須降低RC時間常數(shù),以利液晶電容之充放電.液晶的電光轉(zhuǎn)移特性曲線(V-TCurve)必須量測LCDPanel正確之V-TCurve,以利GammaCorrection選擇適合的驅(qū)動方式(CsonGateorCOM)考慮FeedThrough效應(yīng)的補(bǔ)償及VCOM電壓的調(diào)整.驅(qū)動IC(Scan&Data)的選取針對LCM的解析度及LCDPanel的元件參數(shù)選用DriverIC.ControlPCB的設(shè)計(jì)

針對所選定的DriverIC,ControlPCB提供其所須之控制訊號.大面