TFTLCD 驱动原理PD

A Display Company of Foxconn Group群創光電新幹班EE專業教育訓練資料A Display Company of Foxconn GroupOperating Principle Of LCDA Display Company of Foxconn GroupPanel StructureDotPixelA Display Company of Foxconn GroupTFT LCD 等效電路等效電路Gate DriversSource Driver1H1HClcCsCsCsCsCsCsCsCsCsClcClcClcClcClcClcClcClcA Display Company of Foxconn GroupCst on Gate & Cst on ComA Display Company of Foxconn GroupCst on Gate & Cst on ComA Display Company of Foxconn GroupLC OperatingLC needs AC driving!+ 3 V - 5 V + 4 V- 2 V + 1 V - 3 V+ 4 V - 5 V + 4 V- 3 V + 5 V - 4 V+ 2 V - 1 V + 3 V- 4 V + 5 V - 4 VA Display Company of Foxconn GroupPanel DrivingA Display Company of Foxconn GroupTFT OperatingA Display Company of Foxconn GroupVcoupling ( Feed-through )PixelCgdCgsCsdCsdbCsdbVVVVVVpFCpFCpFCExCCCVCCCCCVCVgdglghghlgdsLCLCsgdghlgdsdLCsgdghlgdgd43. 13005. 08 . 02 . 005. 030102005. 0,8 . 0,2 . 0:A Display Company of Foxconn GroupTFT Driving WaveformSourceDrainGateVgppVsppVgon-minVgoff-minVshVdhVslVdlVgdVghVglVgdCommonVstVst:影像訊號的直流位準TgCsClcCgdCsdCgsVctCh(N-1)Ch(N)Vs垂直影像訊號水平掃描訊號Vg水平掃描訊號VgA Display Company of Foxconn GroupTurn On TFT Line By LineA Display Company of Foxconn GroupFrame TimeFrame TimeGate123N1HL1L2L3DATAA Display Company of Foxconn GroupFrame rateDuty (週期) : Time / 次Frequency (頻率）: 次 / Time ( F = 1 / T )Hz :次 / SecFrame Rate : Pictures / sec ( 60 Hz, 75 Hz )Actual LCD Frame Rate : Frame Rate / 2A Display Company of Foxconn GroupLCD Driving BlockA Display Company of Foxconn GroupX0X1X2X6X7V0V13RSDS DATA(10 pair)CONTROLL(XCLK/POL/STB/INV)STHSTVDVDD/VGH/VGLCPV/OE/XONG3G2G11024*(3)*768384384384384384256257256VCOMVcc :3.3VGND:0VNT3969ANT3951CData (X) / Gate (Y)-DriverA Display Company of Foxconn GroupCsClcCgdCsdCgsVctCh(N-1)Ch(N)VsSource LineGate LineVgVgVshVslVstVthVth正極性驅動負極性驅動負極性驅動正極性驅動資料驅動晶片輸出訊號電位液晶畫素電位Vct=Vst-VpVpBlack(+)White(+)White(+)Black(+)Black(-)Black(-)White(-)White(-)2 Level DrivingA Display Company of Foxconn GroupBlock diagramCPVOEX2DO/IVEEDI/OU/DVDDX264X263256(263)-bit ShiftRegisterLevel ShiftX0X3X262VGGGNDMODEX1X261XonGate Driver (2-level NT3951C)A Display Company of Foxconn Group1. U/D = H MODE=H (256+2 CH output)CPVDI/OX1X2X4DO/I257123256OE4X5255567X3VGGX263X0,X264:Deleted from normaloutput by OEVDDGNDVDDVEEVEEVDDVDDGNDGNDGNDXonGNDVDDGate Driver (2-level NT3951C)A Display Company of Foxconn Group10241344806768H-syncback porch160H-syncfront porch24V-sync back porch29V-sync front porch3CLK:65 MHz(cycle time:15.38 ns)H-fre.:48.36 KHzFrame rate:60HzDisplay active areaDisplay Timing CharacteristicsA Display Company of Foxconn Group tx (1344) Hsw(136) Hbp(160) Hfp(24) tacx H-Sync DSPTMG 38tx 3tx 29tx 6tx 768tx V-Sync DSPTMG XGA VESA TimingA Display Company of Foxconn Group Hsw(144) Hbp(248) Hfp(16) Tacx(1280) H-Sync DSPTM42tx 1tx 38tx 3tx 1024tx V-Sync DSPTMtx (1688) 1066 tx SXGA VESA TimingA Display Company of Foxconn GroupB(+)W(-)B(-)W(+)正極性負極性Vst=VctB(+)B(-)W(+)W(-)B(+)W(-)B(-)W(+) Vp=CgdVghl/Ct正極性負極性正極性Ct=Cs+Clc+Cgd負極性CsVge/CtCsVge/CtCsClcCgdCsdCgsVctCh(N-1)Ch(N)VsSource LineGate LineVgVg3 Level DrivingA Display Company of Foxconn Group128-bit Shift Register6D00ND00PRSDS ReceiverLine Latch ( 384 X 6 bit )6Y1Y2Y3Y384Y383Output Buffer ( 384 channels )Digital to Analog Converter1128DIO1DIO2CLKP14VGMA1 VGMA14CLK1D01PLevel Shift6SHLPOLVCCGNDVDDAGNDA6666D01ND22PD22NDATPOLCLKN66Data Register6666666Line RepairAMPRPI1RPI2RPO2RPO1Source Driver (NT3969A)A Display Company of Foxconn GroupTpdhTstTpsuPOLOdd outputsEven outputsNegativePositiveLDTldTwldTstVcomOutputOutput load condition :DIO1/2( Input )CLKLastTldsLD1K15P1K15P1K15P1K15P1K15PHigh-ZHigh-ZHigh-ZSource Driver (NT3969A)A Display Company of Foxconn Group7.6V4.31V3.29V0VTRASMISSIONVOLTAGEVcom3.8VV0V1V4V5V8V9V reference circuitA Display Company of Foxconn GroupT-V CurveVoffV90VonV100100%90%10%zv%筿 溃 ( rm s)A Display Company of Foxconn GroupGamma CurveA Display Company of Foxconn Group DC Bias of CommonGrayscale Voltage V0V1V2V62V63V63V62V2V1V01 Frame / 1 LineDirect Driving of TFT-LCDA Display Company of Foxconn GroupV0V1V2V62V63V63V62V2V1V0Common WaveformGray Scale Voltage1Frame / 1 LineCommon Swing Driving of TFT-LCDA Display Company of Foxconn Group-4VVpixelVCOM-4V+4V+4V=8VVCOMVpixel+4V+5V0V+1V+4V-4VV=3VVDataVGateVCOMCSTCLCCSTCLCCommon Swing (Cst on Com)A Display Company of Foxconn GroupVGate1VCOMVDataVGate2VCOMVDataVgate1Vgate2Common Swing (Cst on Gate)