液晶顯示器驅(qū)動(dòng)系統(tǒng)

講師:課程大綱液晶物質(zhì)簡(jiǎn)介液晶的電光效應(yīng)液晶基本驅(qū)動(dòng)原理STNLCDs驅(qū)動(dòng)原理TFTLCDs驅(qū)動(dòng)原理影響TFTLCDs畫面品質(zhì)的因素DriverIC簡(jiǎn)介TFTLCDs模組及介面技術(shù)簡(jiǎn)介液晶物質(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膽固醇狀液晶液晶分子的排列CrystallineLiquidCrystallineLiquid

KSmCSmANLBiaxialUnaxialIsotropicTemperature液晶的分類液晶的電光特性異向性(Anisotropic)排列因數(shù)()折射率()黏滯係數(shù)()介電係數(shù)()電導(dǎo)係數(shù)磁化率彈性係數(shù)()液晶的光學(xué)特性O(shè)pticalPositiveOpticalNegativeHelicalAxisOpticalAxisOpticalAxis液晶驅(qū)動(dòng)原理電極電極液晶FieldOFFFieldON液晶顯示器主要優(yōu)缺點(diǎn)優(yōu)點(diǎn)低電壓驅(qū)動(dòng)。低消耗電流。體積薄，重量輕?？蓪?shí)現(xiàn)大面積化。彩色化容易。缺點(diǎn)視角限制。外加被光源或投射光源。溫度操作範(fàn)圍限制。液晶顯示器的種類液晶顯示器扭轉(zhuǎn)型(TwinstNematic,TN)1971超扭轉(zhuǎn)型(SuperTwinstNematic,STN)1984

雙層雙扭轉(zhuǎn)型(DoubleLayerSTN,DSTN)1987

光相位補(bǔ)償超扭轉(zhuǎn)型(FilmSTN,FSTN)1988

主動(dòng)驅(qū)動(dòng)超扭轉(zhuǎn)型(AASTNorMLSSTN)1992強(qiáng)介電型(FerroelectricLiquidCrystal:FLC)1980PDLC(PolymerDispersiveLC)1988PSCT(PolymerStabilizedCholestericTexture)1993OtherDS(DynamicScattering)1968PC(PhaseChange)1968GH(GuestHost)1968ECB(ElcetricalControlBirefregency)1971BTN(BistableTwistNematic)1995IPS(InPlaneSwitch)1995VA(VerticalAlignment)1996TN型

LCDs顯示原理Twist90液晶分子FieldOFFFieldON利用液晶的旋光特性調(diào)變穿透光線液晶的旋光特性消失STNLCDs顯示原理Twist270液晶分子FieldOFFFieldON利用液晶的雙折射特性調(diào)變穿透光線TN&STN電光轉(zhuǎn)移曲線

V-TCurve100%90%10%VnsSTN

VsSTNVsTNVnsTNTVTN與

STN的電壓漂移T100%VTNModeT100%VSTNModeLCDs驅(qū)動(dòng)方式直接驅(qū)動(dòng)法(DirectionAddressing)靜態(tài)驅(qū)動(dòng)法(StaticAddressing)多工驅(qū)動(dòng)法(MultiplexAddressing)主動(dòng)驅(qū)動(dòng)法(ActiveAddressing/Multi-LineSelection)主動(dòng)矩陣驅(qū)動(dòng)法(ActiveMatrixAddressing)兩端元件(MIM,Diode..)三端元件(A-Si:HTFT,Ploy-SiTFT..)PlasmaAddressing(PALC)熱掃描驅(qū)動(dòng)法(雷射掃描)光掃描驅(qū)動(dòng)法(電子速掃描LCDs靜態(tài)驅(qū)動(dòng)法LCCellXORVsVcVsigVcVsigVcVsVc-VsONOFF多工驅(qū)動(dòng)法

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N×M圖框記憶體

N×M圖框記憶體影像資訊輸入IjNXOR陣列N加法邏輯陣列N×MSTNLCDs液晶層間隙4.5um液晶材料：低黏滯係數(shù)水平驅(qū)動(dòng)函數(shù)唯讀記憶體RowFunctionROMNSTNLCDs垂直驅(qū)動(dòng)晶片TFTLCDs垂直驅(qū)動(dòng)晶片1轉(zhuǎn)2多工器2轉(zhuǎn)1解多工器Time臭Seq哄uent田ial硬體架構(gòu)

N×M圖框記憶體

N×M圖框記憶體影像資訊輸入IjNXOR陣列N加法邏輯陣列水平驅(qū)動(dòng)函數(shù)唯讀記憶體RowFunctionROMN1轉(zhuǎn)2多工器2轉(zhuǎn)1解多工器N×M圖框緩衝記憶體N×M圖框緩衝記憶體N×MSTNLCDs液晶層間隙4.5um液晶材料：低黏滯係數(shù)STNLCDs垂直驅(qū)動(dòng)晶片TFTLCDs垂直驅(qū)動(dòng)晶片N主動(dòng)矩陣糾式液晶顯婦示器AM-冤LCD生sTFT枯LCDs等效電路Row模Dr裙ive夾rsColu輸mnD貧rive攤rArra勁ngem庸ent教ofC豎olor套Fil日terRGBRGBRGBRGBRGBRGBRBGRGBRBGRBGRGBRBGRBGRGBRBGRGGBRGGBRGGBRGGBRGWBRGWBRGWBRGWBStr吵ipeTri守ang草lePix氧el議Str茫uct脾ure囑of餐TF道TL喜CDsCso山nCo弟mmon與Cs猛on瀉Gat劑e架構(gòu)液晶畫素TFTGateLineDataLineCsCs液晶畫素TFTCommonCommonGateLineDataLineCsCs

CsonCommonCsonGateTimi剩ngC淺hart橫of泰TFT拉LCDsFra贈(zèng)me芒Tim蜜eGat命e123NTimeTFT帝LC嫩Ds免Dri嘴vin蘭gM蒙eth架odCol垂umn碼In悼ver寫sio蕩nDot盟Inve焦rsio蜓nRow插Inve串rsio法nFra怎me窩Inv泰ers繁ionDir圖ect俯Dr恢ivi穩(wěn)ng惱of場(chǎng)TFT柜LC螺DsDCB典iasofC屯ommo仁nGra判ySc銳aleVol裳tag芬eV0V1V2V3V4V5V6V7V7V6V5V4V3V2V1V01Frame/1LineAC瞞Mod奸ula煤tio嚼nA損ddr諷ess歲ing躺of遺TF向TL忽CDsV0V1V2V3V4V5V6V7V7V6V5V4V3V2V1V0Comm夏onW雄avef墻ormGra借yle狠velVol跟tag擋e1Fra忠me六/1予Li腹neTFT臟LCDs的電光效就應(yīng)

Di妥rect概Add柳ress幅ingTFT丈LC飄Ds的電光角效應(yīng)殃AC聚Add除res輪sin昨gTFT慌LCDs遠(yuǎn)Dri塊ving挑Wav蜂efor傳m

C施son滾Com清mon只(一)TFT真LC肯D驅(qū)動(dòng)波末形(Cs飄on爬Com區(qū)mon泰,C喊omm伶on燥=D校CB管ias樸)TFT降LCDs膨Dri吧ving疊Wav封efor砍m

C泥son劑Com睛mon紅(二)TFT品LC谷Ds學(xué)Dri治vin享gW熄ave黑for芒m劃Cs儲(chǔ)on個(gè)Gat號(hào)eTFT電容效肌應(yīng)的影勿響PixelCgdCgsCsdCsdbCsdb液晶電容年的效應(yīng)液晶電聰容CLC會(huì)隨液晶唇作用電壓傭的改變而凡變化，因此在編驅(qū)動(dòng)液晶己時(shí)會(huì)有殘循存的DC成份，其所造成蘿的影響脫：Ima賽ge狡Sti水cki蔑ng.Pict梅ure屈Flic堂ker.液晶作環(huán)用電壓執(zhí)大時(shí)，液晶鵝分子趨鳥(niǎo)向平行鍬電場(chǎng)方吧向排列減：液晶作用鞠電場(chǎng)小時(shí)添，液晶分穩(wěn)子趨向垂活直電場(chǎng)方漸向排列：二階驅(qū)動(dòng)謠方式的效螞應(yīng)CsClcCgdCsdCgsVctCh(N妥-1)Ch(N紗)Vs垂直影房誠(chéng)像訊號(hào)水平掃災(zāi)描訊號(hào)Vg水平掃描鋼訊號(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)徐法Ch(N-1)Ch(N)Vst=Vct影像訊號(hào)波形Vs水平脈波掃描波形VgeVgeVghlCh(N-1)Ch(N)Vst影像訊號(hào)波形VsVge(+)Vge(-)VghlVghl3Lev柄el尖Add角res糕sin吼g4Lev失el刷Add宋res癥sin亦g3Lev鉗el喚Add臣res拋sin我gB(+)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/Ct4Le后vel律Addr甩essi瓶ngVst=際VctB(+枝)B(-駕)B(-)B(+)W(+)W(+灶)W(-桂)W(-)B(+父)W(-)B(-關(guān))W(+炎)ΔVp(蠟+)ΔVp(估-)ΔVp=即CgdV質(zhì)ghl/趣CtCsVg素e(-)庭/CtCsVg想e(+)槽/Ct正極性負(fù)極性正極性負(fù)極性Ct=C嗎s+Cl翠c+Cg賓dCs藝on誤Gat奪e電壓補(bǔ)維償方式經(jīng)由Cs將前一條水平脈波的補(bǔ)償波形耦合到動(dòng)作的液晶畫素,補(bǔ)償Cgd造成的電壓漂移及改善液晶畫素內(nèi)的直流電電壓殘餘.經(jīng)由TFT的Cgd造成的電壓漂移經(jīng)由TFT的Cgd造成的電壓漂移Comp丈arsi呢ono董fAd子dres驗(yàn)sing灰Met愧hodHor刻izo顧nta漠lL爸ine品Cr微oss準(zhǔn)tal大kABCscCscCscTFT撤Subs轟trat鐵eColo柳rFi紡lter唱Sub湯stra紹teHori轎zont撥alA合rea殊Cros敘stal族kABVert扁ical畢Are屯aCr詞osst魂alkUpLowUpLowShad誦ing茅Cros販stal處kShad剃ing新Cros解stal磨k的抑制Gat聾eP林uls波e的傳遞億延遲Gat渴e(佳Sca焰n)祝Lin丑e的等效把阻抗為喘一連串糟的串聯(lián)RC網(wǎng)路，因挨此Gat童eP霸u(píng)ls喇e在傳遞發(fā)時(shí)會(huì)造棟成波形姜的傳遞團(tuán)延遲失屑真。RCRCRCRCN液晶畫素袖邊際電場(chǎng)棗效應(yīng)(一嚼)Rev韻ers屋eT名ilt畫素電尺極鄰近電投極共通電極VPVLVAVA<VL:D解isc康lin嶄ati柔on傍App祖ear稿e(cuò)dVA>VL:D鴨isc達(dá)lin誕ati末on司Dis政app報(bào)ear獨(dú)edVP>LC盼Thr猶esho狂ldV校olta通geReve醫(yī)rse蹦Tilt液晶畫穴素邊際拖電場(chǎng)效夠應(yīng)(二殲)TFT水平驅(qū)動(dòng)電極垂直驅(qū)動(dòng)電極RubbingDirectionDisclinationLineReverseTiltDomain改善方法1.增加珠液晶分子且的預(yù)傾角(Pret怒ilt全Angl返e)2.增加Bla謠ck斤Mas送k的遮蔽面積驅(qū)動(dòng)IC油－S欣can耐Dr青ive許rBid頌ire薦cti斜ona兇lS解hif獵tR嗚egi蛛ste以rLeve牽lSh踏ift糖Circ營(yíng)uitOutp釘utB球uffe鈴rG1捷G2仇G3胡………臨...STV蒸RSTV京LCPVR/LVDDDVSSDVDDAVSSASTVRSTVLG1G2GxSeri雁alI昏n－雖Seri幕alO團(tuán)ut辟Anal萄ogD抗ata皇Driv樸erSelectDatajDataj+1Mul俯tip威lex倆erPro:結(jié)Very惑sim飽ple.Fewe哭r(nóng)ex絞tern狡alc遷onne梢ctio碰ns.Con:代Many抗ana埋log誓inpu卻ts.Red炊uce飛dp塑ixe藏lc流har辭gin錫gt欄ime盲.Syst蟻emN顛ote侍:Samp抖lec惑lock孤:(芹Dot謊cloc碌k)/臟N,循NPh乓ases恒.Vide戴oPh挑ase腫:NShiftRegisterVideoInQiQi+1Var共iat納ion賣on斗Mu唱lti棵ple助xerPro掩:Vi蒸deo智In助put紋.Con:罩Fast傍dat陵ali稻nec斑h(yuǎn)arg單ing將need樓ed.Red錦uce嚼dp藍(lán)ixe笛lc膛har惕gin楊gt立ime潮.Sys絲式tem細(xì)No哪te:Shif鋸tCl靠ock影:(D顫otC門lock兆)/怪3fo韻rMo樸no.Vid始eo李Pha燒se鳥(niǎo):3除fo敲rM堵ono烈.Samp啟lea醬ndH享oldSeri大alI澆n－盤Para歐llel聚Out筍Ana嘩log壩Data派Dri車ver竿(一)ShiftRegisterQiQi+1Qi+2Qi+3VideoInTransferDoubleSampleandHold/SinglePhaseSampleNSampleN+1SampleN+2TTTNN+1N+2OutN-1OutNOutN+1Pro:VideoInput.Smallloadonfastsample-and-holds.Fulllinetimetochargepixel.Con:Complexanalogcircuit.Physicalsize.SystemNote:ShiftClock:DotClock.VideoPhase:SinglePhase.Seri的alI嘩n－元Para叫l(wèi)lel到Out月Ana弓log槳Data啦Dri隆ver辱(二)ShiftRegisterQiQi+1VideoInTransferDou惠ble動(dòng)Sa攤mpl囑ea異nd械Hol飼d/罪Mu驚lti薯-Ph凝asePor軋:擦Red晶uce建do炭per厭ati幅on言fre犯que醋ncy榨.Sys調(diào)tem雨No桃te暑:Vide差oIn洗:NVid糟eo攪Pha牲se島:NShi蘿ft張Clo馬ck顆:(墳Dot與Cl評(píng)ock異)/除N.Digi帝tal判Data瞞Dri冶ver括(一)ShiftRegisterDACDACDACDACDAC

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