TFT--LCD-残像原理与分析

Apr.2012135AdvancedDisplayTFT-LCD，（，210033）：TFT-LCD，，，。TFT-LCD、、、，。：；：TN141.9；TN873+.93：ATheTheoryandAnalysisofTFT-LCDImageSticking(Basis)JIAOFeng,WANGHai-hong(NanjingCECPANDALCDTechnologyCo.,Ltd.R&DCenter,NanjingJiangsu210033,China)Abstract:ImageStickingisadisplaybehaviorofTFT-LCD.Mainlyexpressedwhenastaticimageremainsdisplayedonthesamescreenforalongtime,theoriginalimagewillbeleftwhenthescreenswitchestothenextimage.Thebasisofthisarticlewillsystematicallyintroduceclassification,mechanism,experimentconditions,judgmentandimprovementofTFT-LCDimagesticking,toobtainabetterimagestickingimprovementsolution.Keywords:TFT-LCD;imagesticking1006-6268201204-0054-06：2012-03-12，：TFT-LCD（）、、、。、、、。TFT-LCD[1-3]。TFT-LCD、、、。1。1ImageSticking、、54Apr.2012135AdvancedDisplay、。2、2。。3。33.1Simi（Stain）Simi。SimiStain。PanelCellProcessIon、12，：TFT-LCD（）55Apr.2012135AdvancedDisplay3、、、C/RIon、Panel。4Simi。5PanelIonSimi。IonSimiIonCellChargeUpSimi。SimiIon。3.2。CellFeedthroughOffsetDC[4]。6FeedthroughΔVlc=CgsCgs+Cst+Clc·ΔVgDCCOMDCAC。7CellDCCellDCIon。StressDCStressStressOffDCΔVlc'IonDC。/。，：TFT-LCD（）56Apr.2012135AdvancedDisplay5DC。3.3。。[5-7]。8，：TFT-LCD（）57Apr.2012135AdvancedDisplay7/1CFTSimi55±5℃0.5h,1h,4h,8h,24h,48h0.5h,2h,8h,24h,48h:SrtipePattem～60secPattem10h、309DisclinationReverseTilt。。9。Disclination。48，：TFT-LCD（）58Apr.2012135AdvancedDisplay1。55.12。5.23。6TFT-LCD、、、。[1]HuangPW,LiangBJ.StudyonImageStickingPhenomenoninSTNLCD[D].Taiwan:DMC,2003:667.[2].TFT-LCD[J].2008234412-414.[3].、[M].2007.421-35.[4].TFT-LCD[M].2011.1245-47.[5].[P].ZL200880004765.52008-02-26.[6].[P].ZL201110032725.52008-02-26.[7].[P].ZL201110032727.42008-02-26.：[e-mail]。23Simi·Ion·CellIon·DC·CellDCDC·CellSimiIon·Process··、·IonDC··VcomShift、·Process·Tr·、·DC·、·PreTilt·Process·、，：TFT-LCD（）59May.2012136AdvancedDisplayTFT-LCD-，（，210033）：TFT-LCD，，，。FeedthroughDC、、TFTLeak，。：；；：TN141.9，TN873+.93：ATheTheoryandAnalysisofTFT-LCDImageSticking-UpgradeIJIAOFeng,WANGHai-hong(R&DCenter,NanjingCECPANDALCDTechnologyCo.,Ltd.,NanjingJiangsu210033,China)Abstract:ImageStickingisadisplaybehaviorofTFT-LCD.Mainlyexpressedwhenastaticimageremainsdisplayedonthesamescreenforalongtime,theoriginalimagewillbeleftwhenthescreenswitchestothenextimage.TheupgradepartIofthepaperspeciallyanalyzemechanismandimprovementsolutionofimagestickingfromdesignprocessincludefeedthroughDCcomposition,asymmetricpixelstructureandTFT-related,particularlyleakagecurrent.Keywords:TFT-LCD;imagestickingasymmetricpixelstructure1006-6268201205-0016-05：2012-03-11，：TFT-LCD-、、、。、、、。TFT-LCD[1-3]。16May.2012136AdvancedDisplayFeedthroughDC、、TFTLeak。11.1FeedthroughDCDCFeedthroughOffsetDC[4]。1VgGateVsSourceVlcCgsGateDrainCstClc。Cgs(Vlc-Vgon)+Cst(Vlc-Vgon)+Clc(Vlc-Vcom)=Cgs(Vlc'-Vgoff)+Cst(Vlc'-Vgoff)+Clc(Vlc'-Vcom)。ΔVlc=Vlc-Vlc'、ΔVg=Vgon-VgoffFeedthroughΔVlc=CgsCgs+Cst+Clc·ΔVgFeedthroughΔVlcCgs、Cst、ClcVgon-Vgoff。Clc。Vgon-Vgoff。Feedthrough。Feedthrough12ΔVlc，：TFT-LCD-17May.2012136AdvancedDisplay341Gate/、W、、Vgon。2COMDC。2ΔVlc。ΔVlcVcomClcΔVlcDC。3TFTCDOverlayCgsΔVlcDC。FeedthroughDC。1.23IPS。[5]。FrameIonIonFramePassivationIonIon。DC。Ion。FrameIon4。IonDC。1.3TFTLeakTFTLeakLeak。，：TFT-LCD-18May.2012136AdvancedDisplayTFTLeak1Vgoff———Vgoff2———3Leak———IonLeakaTFTLeak[6]b。Leaka5IonTFTBackGateLeak。Leakb6TFTIslandLeak。1Vgoff———Vgoff2———Leak3LeakIonLeak———n+TFTLeak———TFTIsland。TFTLeak。5TFTLeak6TFTLeak，：TFT-LCD-19May.2012136AdvancedDisplay2012419、/LED。。/LEDLED/LED。。LEDLED。、、。。LEDLED———LEDLED。LED。2FeedthroughDC、、TFTLeak。。[1]HuangPW,LiangBJ.StudyonImageStickingPhenomenoninSTNLCD[D].Taiwan:DMC,2003:667.[2].TFT-LCD[J].2008234412-414.[3].、[M].2007.421-35.[4].TFT-LCD[M].2011.1245-47.[5].[P].ZL201120237720.12011-07-07.[6]ZhaoHY,YouJ,RyuJL,etal.Photo-leakagecurrentimpactonimagesticking[C].IDW'09Digest,MiyazakiJapan:IDW,2009:69-72.：[e-mail]。，：TFT-LCD-20Jun.2012137AdvancedDisplayTFT-LCD-，（，210033）：TFT-LCD，，，。、、、ODF。：；;：TN141.9，TN873+.93：ATheTheoryandAnalysisofTFT-LCDImageSticking-UpgradeIIJIAOFeng,WANGHai-hong(R&DCenter,NanjingCECPANDALCDTechnologyCo.,Ltd.,NanjingJiangsu210033,China)Abstract:ImageStickingisadisplaybehaviorofTFT-LCD.Mainlyexpressedwhenastaticimageremainsdisplayedonthesamescreenforalongtime,theoriginalimagewillbeleftwhenthescreenswitchestothenextimage.TheupgradepartIIofthepaperspeciallyanalyzemechanismandimprovementsolutionofimagestickingfrommaterialincludecolorfilter,liquidcrystal,alignmentfilmandPIprocessandODFprocess.Keywords:TFT-LCD;imagesticking;alignmentfilm1006-6268201206-0017-06：2012-03-12，：TFT-LCD-、、、、、、。TFT-LCD[1-3]。、、、ODF。17Jun.2012137AdvancedDisplay211.1-1IPSBusLineVgoff1。BM-10V[4]。2。。BusLineBMBusLine。31011～1012Ω·cm。BusLineDC。1.2-。LowVoltageHoldingRatio、HighIonDensity、LowRe-sistivity。Δε，：TFT-LCD-1IPS3BusLine18Jun.2012137AdvancedDisplay4Simi。。Ion。1.3-。VoltageHoldingRatio[5]、DCResidualDC、IPS。、DCIPSalkylUV2AAC。。1.3.1。4、NMP、γ-BL、BC、、、DC、。。1.3.2（IPS）IPS。5V-T。6V-T。，：TFT-LCD-19Jun.2012137AdvancedDisplay8AC6、、。7。IPS。1.3.3UV2A（AC）DCACAC[6-8]。AC12AC。AC。8。。AC。-9、。，：TFT-LCD-720Jun.2012137AdvancedDisplay11。。、、、。10。AC。2。K