KODAK Advanced Active Matrix OLED Technologiesppt课件

1,AdvancedActiveMatrixOLEDTechnologies,StevenA.VanSlykeDisplayandComponentsOLEDModulesBusinessUnitEastmanKodakCompanyRochester,NewYork,USA,2,Outline,MethodsofColorPatterningDiscussionofRGBWFormatRGBWinimagingapplicationsDisplayPrototypeswithRGBandRGBWWhitechemistryandformulationDisplaydesignsProcessingandtestingPowerconsumptionofRGBandRGBWdisplaysImportanceofemitterwhitepointColorfilterarrayOperationalStabilityConclusions,3,Cathode,ETL,HTL,Anodes,Substrate,PatternedRGBEmittingLayers,White-EmittingLayerwithRGBColor-FilterArray,AdvantagesHighefficiencyGoodcolor,DisadvantagesTypicallyusesshadowmaskingforRGBpatterning(yield,cost,scaleability)Apertureratioissues(shadowmask)DifferentialagingofRGB,AdvantagesUnpatternedemittinglayer(nomasks)AperturerationotaffectedbyRGBpatterningEnabledbyhighefficiencywhiteFewerOLEDprocessingstepsReduceddifferentialaging(whiteisverystable),DisadvantagesLossofefficiencyduetofilterabsorptionGamutcontrolledbywhitespectrum,EmittingLayer,White-EmittingLayer,RGB,W-RGB,MethodsofColorPatterning(illustratedforbottomemitting),4,ShadowMaskinginManufacturing,TaperedMaskEliminatesNon-UniformityWithinPixel,Precisionalignmentsubsystems:+/-3minproductionTolerancesacrossa335x550mmsubstrate:+/-15mSignificantconcernsthermalexpansioncontactwith(fragile)substratecleaningwithoutdamageabilitytoscaletolargesubstratesCOST,5,ExamplesofRGBandWhite-RGBDisplays(AMOLED),KodakLS633LTPS(521x218),2.2”,Kodak/SanyoLTPS,15”,RGBdirectpatternedWhitewithRGBcolorfilters,ProductsPrototype,3.8”,NeosolPMPLTPS(521x218),2.2”,6,White-EmittingLayerwithRGBWColor-FilterArray,AdvantagesUnpatternedemittinglayer(nomasks)Highefficiencywhitesub-pixelresultsinsignificantpowerreduction(alargeportionofimagecontentcontainswhite)Enabledbyhighefficiencywhite,DisadvantagesLossofefficiencyduetofilterabsorption,White-EmittingLayer,W-RGBW,MethodsofColorPatterning(illustratedforbottomemitting),RGBW,7,RGBandRGBWFormats(withWemitter),WhiteOLED,ColorFilterArray,DeviceEmission,Allsub-pixelsfiltered,Whitesub-pixelunfiltered(displayefficiencygain)Takesadvantageofhighefficiency,stablewhiteForimaging,takesadvantageoffactthatmostimagesareveryunsaturated(theworldisgray),ApproximateEfficiencies(cd/A),2.6,6.6,1.1,12.5,2.6,6.6,1.1,RGBFormat,RGBWFormat,12.5cd/A,12.5cd/A,8,RGBandRGBWprimarycolors,Red,Green,Blue,White,RGB,RGBW,ShownforNTSCcolorsandD65white.,9,RGBandRGBWunsaturatedcolors,Emittingsub-pixelsRGBRGBWRedWhiteGreenGreenBlueBlueRedRedGreenGreenBlueWhiteRedRedGreenWhiteBlueBlue,ShownforNTSCcolorsandD65white.,10,ImportanceofNeutralColorsinImaging,ProbabilityinDSCImages(basedon13,000images),Basedon13,000DigitalStillCameraImages,11,DisplayPowerConsumptionforRGBandRGBWAssumesWisfullyutilizedtoreducepower,C=0%,C=100%,ColorSaturation,RGBW/RGBpowerconsumption,For13,000DSCimages,colorsaturation50%,RGB,RGBW,12,Outline,MethodsofColorPatterningDiscussionofRGBWFormatRGBWinimagingapplicationsDisplayPrototypeswithRGBandRGBWWhitechemistryandformulationDisplaydesignsProcessingandtestingPowerconsumptionofRGBandRGBWdisplaysImportanceofemitterwhitepointColorfilterarrayOperationalStabilityConclusions,13,WhiteOLEDLayerStructureusedforPrototypes,Note:Betterpowerefficiencyresultsifwhitepointofemitter=D65,14,528columns(176xRGB),528columns(132xRGBW),220rows,RGBandRGBWAMOLEDTestLayouts2.2”diagonal198x66usub-pixelsize,38720pixels(RGB)(RGB=SQUARE)116160sub-pixels,29040pixels(RGBW=RECTANGULAR)116160sub-pixels,15,176(RGB)x220,132(RGBW)x220,RGBandRGBWTestLayouts2.2”diagonal198x66usub-pixelsize,RGBPixel=198ux198u,RGBWPixel=264ux198u,Notethatthisisatestformatonly.Abettercomparisonwouldbewith176(RGBW)x220.,2.2inchdiagonal,16,PrototypeProcessFlow,6”x6”substratewithfour2.2”displays,=AMOLED-RGBColorFilterArray,=AMOLED-RGBWColorFilterArray,CoatorganicandCathodelayers,Scribe/break,Test,IdenticalwhiteformulationusedforbothRGBandRGBW,17,PrototypeCharacteristics,Note:Efficiencyandcolorsdependoncolorfilterselection.,18,DataLine,DataStorageCapacitor(keepsVgconstantduringframetime),PowerTransistorVglevelcontrolsgrayscale,WriteTransistor(actsasswitchtoallowdatatobewrittentopowertransistor),DataLine(appliesvoltagetopowertransistorgate),RowScanLine,CapacitorLine,PowerLine(Vdd=13volts),OLED,CommonCathode(unpatternedcathodefilmcommontoallpixels),NOTE:StandardTwo-TransistorDesignUsed,19,TestMethodology,Determineluminance-current-chromaticitycharacteristicsforeachcolorchannel(R,G,B,andW)DisplayimagesthathavebeenappropriatelyprocessedforRGBandRGBWdisplaysMeasurethetotalpanelcurrentforeachimageCalculatethepowerconsumptionforeachimagePower=Panelcurrentx13voltsComparepowerconsumptionofdevicesRGBvs.RGBW(Note:thesearebothwithwhiteemitter/colorfilterarrays),20,RGBWDisplay,Display“on”,Display“off”,Display“off”,21,RGB176(RGB)x220,RGBW132(RGBW)x220,RGBandRGBWDisplays,22,22,RGBW132(RGBW)x220,RGB176(RGB)x220,RGBandRGBWDisplays,23,Outline,MethodsofColorPatterningDiscussionofRGBWFormatRGBWinimagingapplicationsDisplayPrototypeswithRGBandRGBWWhitechemistryandformulationDisplaydesignsProcessingandtestingPowerconsumptionofRGBandRGBWdisplaysImportanceofemitterwhitepointColorfilterarrayOperationalStabilityConclusions,24,RGBandRGBWPowerConsumption2.2”diagonal,100cd/m2whiteafter44%Tcircularpolarizer,W-RGBW,W-RGB,Averagefor13,000images:180mW-RGBW340mW-RGB,25,ImportanceofEmitterWhite=DisplayWhite,Relativewhiteemitterefficiency(cd/A)toattainequalRGBWdisplaypower.,=D65,Targetdisplaywhitepoint=D65,Conclusionveryimportantthatemitterwhiteisclosetodisplaywhitepointforlowestpowerconsumption.,26,ConclusionsPowerConsumption,TheRGBWformatrequiresthepowercomparedtotheRGBformatagreeswithmodelprediction.Iftheemitterwhitepointisnotatthedisplaywhitepoint,(D65),theefficiency(cd/A)needstobehigherforequivalentpowerconsumption.,27,Outline,MethodsofColorPatterningDiscussionofRGBWFormatRGBWinimagingapplicationsDisplayPrototypeswithRGBandRGBWWhitechemistryandformulationDisplaydesignsProcessingandtestingPowerconsumptionofRGBandRGBWdisplaysImportanceofemitterwhitepointColorfilterarrayOperationalStabilityConclusions,28,OperationalStabilityWhiteChannel,Testcondition:whitesub-pixelsoperated,Note:Apertureratio=0.285Whiteratio=0.25Fractionemitting=0.0713,29,OperationalStabilityModelResults,AMOLEDStabilityModelingInputs:DisplayLuminanceTargetwhitepointColorfilterpropertiesContrastfilterpropertiesWhitestabilityatvariouscurrentdensitiesWhiteemissionspectrumWhiteefficiencyApertureratiolimitsAverageDSCimagesOutputs:Ave