TFT-LCD驱动原理简介

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1、驅動原理簡介系統設計TFT-LCDG1G2G3GmGm-2Gm-1S1S2S3Sn-2Sn-1SnCircuitPlateWhydoesLCinversion?TFTCFVsVcomTFTCFVsVcom+_+_VcomVshVslVshVslVcomFrameInversionLineInversionColumnInversionDotInversionDrivingMethodDrivingmethodcomparisonInversionFlickerCrosstalkTotalPow

2、erVcomPowerDriverpowerSignalFramePoorPoorVerticalAndHorizontalGoodLowLowACVcomDCVcomRowGoodGoodVerticalPoorHorizontalBadHighlowestACVcomDCVcomColumnBetterPoorVerticalGoodHorizontalVerygoodNoneLowOnlyDCVcomDotBestGoodVerticalandHorizontalGoodNoneHighOnl

3、yDCVcomFrameNColumnsFrameN+1Columns1234512345Lines+－+－++－+－++－+－+－+－+－－+－+－ColumnInversionDotInversionLineInversionFrameInversion1234512345Lines+－+－++－+－++－+－+－+－+－－+－+－DrivingMethodDotInversion+--+-++-VgVsVcomVp1234BAA1A3A2A4B1B3B2B4Feed-throughVoltag

4、eCsVghVglGateVsCgdClcVcomVp電荷守恒定理LVDS&TimingControllerGammaGeneratorDC-DCConverterVCOMDriverUserConnectorSourceDriverTFT-LCDPanelGateDriverG1G2G3G1050D1D2D3D4200Source&ControllerPCBControlSignalVCOMGammaDVDDAVDDVon/VoffVideoSignalFPC&ConnectorEEPROMI2C

5、SXGA+BlockDiagram1)Sourcedrivera.P01(SD-LH165415)Feature:1)6bitdigitalinput(262,144colors)R(0,0,0,0,0,0,)-(1,1,1,1,1,1)G(0,0,0,0,0,0,)-(1,1,1,1,1,1)B(0,0,0,0,0,0,)-(1,1,1,1,1,1)2)Singleportinput3)11referencevoltages4)Modeselect:309/300output5)Shiftcloc

6、kfrequency:55MHz(Max.)6)Lineinversionb.P03(LH168A05)Feature:1)6bitdigitalinput(262,144colors)2)Dualportinput3)10referencevoltages4)384output5)Shiftclockfrequency:55MHz(Max.)6)Lineinversion2)Gatedrivera.P01(LH169402)Feature:1)256output2)Outputsignalmask

7、ingfunctionb.P03(LH169203)Feature:1)Output:3002)Internalcountingsystem3)Modeselection(3modes)18TconD1D2D11D3DBOODBOEDBEODBEED10CLKOCLKESPLSP03Drivingstructure(Sourcedriver)TconD1D2D10D3DBODBE18D9CLKSPLPP01Drivingstructure(Sourcedriver)TconGSP1GSP2GCKGD

8、1GD2GD3GD4CE1:LCE2:HCE1:HCE2:HCE1:HCE2:HCE1:LCE2:HTconGCKGSPGD1GD2GD3P03Drivingstructure(Gatedriver)P01Drivingstructure(Gatedriver)VcomDCdriving-Frame,Row,ColumnandDotinversionavailable.VcomACdriving-Frame&Rowinversionavailable.VESAVide