TFT-LCD基本原理與設(shè)計(jì)

課程大綱

TFT-LCD產(chǎn)業(yè)

TFT-LCD簡(jiǎn)介

TFT-LCD驅(qū)動(dòng)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(jiǎn)介液晶的光電特性

TFTLCDsA/C架構(gòu)

TFTLCDs模組架構(gòu)

TFT-LCD驅(qū)動(dòng)原理

TFT-LCD設(shè)計(jì)主動(dòng)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(dòng)矩陣式液晶顯示器

AM-LCDsPanelStructure主動(dòng)矩陣式液晶顯示器

AM-LCDsPanelStructure主動(dòng)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(dòng)矩陣式液晶顯示器

AM-LCDsPanelStructureClcTFTSubstrateColorFilterSubstrateRGBClcClcRBG主動(dòng)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(chǎng)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(chǎng)方向出射光之極化狀態(tài)未加電場(chǎng)"OFF"狀態(tài)施加電場(chǎng)"ON"狀態(tài)出射光VerticalAlignmentModeLCDs未加電場(chǎng)OFF狀態(tài)施加電場(chǎng)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(dòng)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(duì)比低畫面品質(zhì)差Slightlydependentonviewingangle畫面對(duì)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(dòng)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(jiǎn)介

TFT-LCD驅(qū)動(dòng)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(chǔ)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(dòng)波形(CsonCommon,Common=DCBias)TFTLCDsDrivingWaveform

CsonCommon(二)TFTLCDsDrivingWaveform

CsonGateTFT電容效應(yīng)的影響PixelCgdCgsCsdCsdbCsdb二階驅(qū)動(dòng)方式的效應(yīng)CsClcCgdCsdCgsVctCh(N-1)Ch(N)Vs垂直影像訊號(hào)水平掃描訊號(hào)Vg水平掃描訊號(hào)VgVshVslVstVthVth正極性驅(qū)動(dòng)負(fù)極性驅(qū)動(dòng)負(fù)極性驅(qū)動(dòng)正極性驅(qū)動(dòng)資料驅(qū)動(dòng)晶片輸出訊號(hào)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(dòng)法Ch(N-1)Ch(N)Vst=Vct影像訊號(hào)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(jiǎn)介

TFT-LCD驅(qū)動(dòng)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(shí)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(gè)Frame的時(shí)間直流漂移(DCOffset)當(dāng)ScanLine上GatePule關(guān)閉時(shí),透過雜散電容(Cgd,Cgs,Cds),對(duì)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(shí)間常數(shù)高解析度時(shí),必須降低RC時(shí)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(cè)LCDPanel正確之V-TCurve,以利GammaCorrection選擇適合的驅(qū)動(dòng)方式(CsonGateorCOM)考慮FeedThrough效應(yīng)的補(bǔ)償及VCOM電壓的調(diào)整.驅(qū)動(dòng)IC(Scan&Data)的選取針對(duì)LCM的解析度及LCDPanel的元件參數(shù)選用DriverIC.ControlPCB的設(shè)計(jì)

針對(duì)所選定的DriverIC,ControlPCB提供其所須之控制訊號(hào).大面