LCD背光模組設(shè)計(jì)1ColorfilterLCDPCBBacklightmodule液晶顯示器的結(jié)構(gòu)實(shí)物圖平板顯示技術(shù)_C2LCD_4TFTLCD組成.ppt2contentsSection1I:IntroductiontoFundamentalOptics

II:ApplyOpticstoLGP(light-guidingplate)

Section2

III:AppliedOpticsintheConstructionoftheBack-lightModules

IV:ThefutureoftheBack-lightModules

Section3V：BacklightDesignandSimulation3Themainopticalunitsconstructedinback-lightmodulesprismlensdiffuserLGPreflectorLampreflectorCCFLPatterns(elements)4TheReflectionandRefractionofLight

1,Reflectionandrefractionphenomenawillhappenontheinterfacewhenlighttransportsthroughit.2,thereflectionoflightactsaccordingtothe

reflectionrule.3,therefractionoflightactsaccordingtothe

refractionrule.5TheReflectionRuleofLight

1,insertline(),normal()andreflectline()areonthesameplane.2,insertangleisequaltothereflectionangle.

6TheRefractionRuleofLight

1,,insertline(),normal()andreflectline()areonthesameplane.2,insertangleandrefractionangleactaccordingtothe

Snell’slaw7ThemeaningsoftheSnell’sLaw1,if2,ifWhat’shappenedwhen?8TheCriticalAngleandTotalReflectionWhenandCriticalangleTotalreflectionNormalrefraction9Diffusion

Whenparallellightwavesmovingthroughroughsurfacesorparticles,diffusionwillbeformedbythereasonthatnon-parallelfactorofthenormalforthosesurfacesandparticles.10Thediffusioneffectdependsontheroughnessoftheinterfaceofthemedia.11AppliedopticstoLGP

fundamentalprinciples---

totalreflectionanddiffusiontheopticalpropertiesoftheprintedunitstheopticalpropertiesfordifferenttypesof

reflectionunitsthepropertiesoftheprint-less

LGPs12CriticalanglesandtotalreflectionofLGPCriticalangle13RefractionIndexv.s.LGP(Light-Guidingplate)

RefractionindexproperenergyLGP14Refractionindexv.s.LGPrefractionindexeffectiveareaofluminary15

折射率大者，單位面積能量利用效率較大RefractionIndexv.s.LGP16折射率大小對(duì)導(dǎo)光板選擇的影響

折射率大者,單位面積有效出光角較小17印刷點(diǎn)的光學(xué)性質(zhì)

印刷點(diǎn)是用高反射或高折射材料混合油墨印刷在導(dǎo)光板的反光側(cè)，藉由改變光路徑形成漫射效果導(dǎo)光板反光面出光面印刷點(diǎn)1819印刷點(diǎn)對(duì)光能的有效使用率油墨比入射至印刷點(diǎn)單位面積光能量印刷點(diǎn)截面積20油墨比與光能的有效使用率21印刷點(diǎn)截面積,入射至印刷點(diǎn)單位面積光能量與光能的有效使用率22測(cè)量與設(shè)計(jì)的修正量測(cè)區(qū)域,區(qū)域面積23印刷點(diǎn)的極限容易受環(huán)境條件改變而縮短壽命受印刷網(wǎng)版網(wǎng)目極限限制dimension(~250m)24無印刷導(dǎo)光板的光學(xué)性質(zhì)

定義:何謂“無印刷”“無印刷”的方法種類

1,機(jī)械加工

2,刻蝕

3,薄板取代

4,其它

各種“無印刷”的方法所形成patterns的光學(xué)特性25機(jī)械加工刻蝕薄板取代26無印刷的定義:

把所需的光反射元件先行轉(zhuǎn)置在模具上,然後用一體成型得到所要物件的方法無印刷導(dǎo)光板:

用無印刷方法所製作的導(dǎo)光板27機(jī)械加工法光反射元件的光學(xué)原理與特性V-groovetypeU-groovetype282930反射元件間隙(pitch)的影響31蝕刻法光反射元件的光學(xué)原理與特性32薄板取代法:

師法於“半導(dǎo)體”的製程,主要是微小光反射元件,可增加局部區(qū)域能量調(diào)整的程度intensityintensity33PhotomaskPhotoresistsubstrateParallellightFormthemetalplatebyelectro-forming34各種無印刷方法的比較35背光模組整體結(jié)構(gòu)稜鏡片(prismlens)擴(kuò)散片(diffuser)導(dǎo)光板(LGP)反射片(reflector)36反射板與導(dǎo)光板間

反射板一般為“擴(kuò)散反射”,用以增加回授的光能可用率37擴(kuò)散板與導(dǎo)光板間38Diffuser------prismlens3940ThefutureandchallengeofBacklightmodules1,future:LCDscaleBL2,challenge:(1),Brightness,Uniformity

(2),NotebookthinnerandthinnerMonitorlargerandlarger(3),EL,OLED,…..41AdvancedSPECTERFeatures

OPTOS,MODIFIERS&OBSERVERS

DesignofBacklightIlluminatingSystems

42Polarizationfilter(DBEF)LightGuidingPlate

withmicrodimplesBottomandsidereflectorsLamp(CCFL)LampreflectorPrismsheet(BEF)DiffusesheetParticlesinsideLGPmaterialGeometricalandOpticalComplexityofLightPropagation

atypicalschemeofbacklightsystemTrackingbillionsofstochasticallygeneratedlightraysdemandsanefficientGeneralPurposeRayTracingschemeLighttrackingofmega-,giga-,andtera-deterministicallyor/andstochasticallydistributedmicroelementswithcomplex,diversifiedshapesnecessitatesaProcedurallyorientedRayTracingMultipleinternalreflectionsinLGPMicrogroovesofBEFDimplesonbottomLGPfaceLightscatteringinamediacontainingmultitudeofmicroandnanodenselypackedparticlesdemandsaccommodationofWaveOpticsphenomenaLightreflectioninstochasticmicro-roughnessdemandsaProceduralRayTracingScheme

MicroroughnessonLGPsurfaceFilms,diffusesheets,polarizationfiltersenforcecomplexlighttransformationsincludingpolarizationComplexpolarizationfilter(DBEF)43OPTOSRaisonD’etre:AccurateandEfficientLightTrackinginGeometricallyandOpticallyComplexEnvironmentsTechnologicallyadvancedopticaldevices

arecharacterizedbysimultaneousoccurrence

ofcomplexlightpropagationphenomenaexemplifiedbyLightPolarization,VolumeScattering,WaveEffects,etc.Toaddressthislevelofopticalcomplexityinbothpreciseandefficientfashion,aspecialbranchofclassesofOPTical

ObjectS(OPTOS)hasbeendevisedandincorporatedinSPECTER.OPTOSconceptexample:DIMPLESLGPDimplesonbottomLGPfaceLamp(CCFL)LampreflectorOPTOSboxRayspreadsinasceneandhitsasurfacewithOPTOSRayleavesOPTOSandcontinuesspreadinginthesceneRayistransformedbyOPTOSOPTOSboxDimplesencapsulatedinanOPTOSbox44OPTOSClassesinSPECTEROPTOSVolumeScatteringMicroReliefMicroStructurePolarizedBSDFOPTOSmicrostructureallowsspecificationofdifferentdistributionsofmicroelementswithmillionsandmoredimples,grooves,dots.OPTOSMicroRelief

simulatesroughsurfaces.TheinputdataforthisOPTOScanbeamicro-profiledmeasuredbya3Dscanner.OPTOSpolarizedBSDFallowssimulationandanalysisofthecomplexlightpropagationonfilms,surfaceswithpolarizationproperties,forexamplespecialpolarizationfilterslikeDBEF.OPTOSVolumeScatteringsimulatesmaterialswithcomplexvolumetricproperties:HSOTpolymers,polycrystallineopalglasses,diffusefilms,etc.

DBEFIncidentlightReflectedlightTransmittedpolarizedlight45OPTOS&theirsMODIFIERSSceneobjectOPTOSModifierUserMODIFIERprovidesUserInterfaceforcontrollingOPTOSparametersExample:LGPentranceismicroprofiled

MicroprofileOPTOSisusedforencapsulationOPTOShandleslighttransformationwithinmicroprofileOPTOSparametersareaccessibleviaitsMODIFIERAnyobjectinascenecanbeencapsulatedinanyOPTOS46ExampleofOPTOSModification

InternalproceduraldefinitionsofanOPTOSarecontrolledbyasetofparameterspresentedinitsMODIFIER.MODIEFIERScanbecustomizedtoreflectspecificcustomerneeds.MODIFIERpanelAmicrostructureOPTOSDimplesConstantsizeVariablesize

47OPTOSMicrostructureConstructionAnyshapeofmicroelement(dimple,groove)withallkindsofdistributionspatterns:deterministic,probabilistic,-practicallyunlimitednumberofmicroelements-medium3MicroelementscanbemadefromdifferentmaterialsThegeometryofmicroelementscanbeconstructedfromprimitives

usingBooleanoperations+=ParticipationofmediawithdifferentpropertiesmicrostructureareaExternalgeometry(IGES,DXF,STEP)usedformicroelementdefinition48OPTOSLibrary:MicrostructuresofDimplesandGroovesReady-to-useOPTOSlibrariesallowausertoselectadesiredmicrostructureelementGroovesDimplesRandomArbitrarySelectobjecttypes:Selectadistributiontype:Selectashapeofamicroelement:49OPTOSMicrostructureOperationsThemicrostructurewithvariousshapesofdimplesarbitrarilydistributedoverasurface.Microelementswithcomplexshapescanbedecomposedintosimplerones.

Ausefulpossibility-parametriccontrolofcomplexshapeslikea3Dtrapezoidalprism(variationofanglesa,bandlinearsizesS,L,H).Inverseorientationofmicroelementsrespectingtotheboundarythatseparatesmedia.50OPTOSMicrostructures:DistributionPatternsGroovesLampDesign

PlaneLightEmitterDesign

DesignofInfoSigns

DesignofMidairTypeBacklightDevice

Parasitic(Stray)LightAnalysis

OPTOS

OPTOS:VolumeScattering

OPTOS:PolarizedBSDF

OPTOS:LightScatteringMicrostructures

SPECTER

Specification

Features

Applications

Lastupdate:

Copyright?1997-2005INTEGRAInc.AllRightsReserved.

RandomwithvariabledensityArbitraryRegularwitharbitrarystepChessregularwitharbitrarystepFunctionalIntersectedGroovesXYy1y2x2x151MicroelementwithdifferentopticalpropertiesIntersectionofmicroelementsCombinationofdimplesandgroovesCombinationofdifferentdistributionpatternsOPTOSMicrostructures:AdvancedFeaturesDiffusepropertiesTransparentproperties52ExamplesofBacklightModelsLightGuidingPlatewithmicrodimplesLamp(CCFL)PolarizationfilterBottomandsidereflectorsPrismsheet(BEF)DiffusesheetLampreflector1LightGuidingPlatewithmicrodimples2LEDsReflectorsDiffusesheetLightGuidingPlatewithmicrogroovesontopandbottomfacesLampreflectorsLamps(CCFL)Bottomreflector3LightGuidingPlatewithimprinteddotsLamps(CCFL)LampreflectorsReflectorbox4LGPwithVolumeScatteringReflectorPrismsheets(BEFs)DiffusePlateLamps(CCFL)5LS:CCFLwedge-shapedLGP,severalfilmsLS:LEDs

2DdimpledistributiononthebottomLGPfaceLS:CCFLmicrogroovesonthebottomplateLS:lampsfromeachsideofLGP2DdistributionofimprinteddotsonthebottomLGPfaceLS:multipleCCFLs

VolumeScatteringinLGP53DesignofDifferentPartsofBacklightSystemAbacklightdevicewithCCFLPolarizationfilter(DBEF)LightGuidingPlatewithmicrodimplesBottomandsidereflectorsLamp(CCFL)LampreflectorPrismsheet(BEF)DiffusesheetOptimizationofthelampanditsreflectorformaximumefficiencyOptimizationofmicrodimplesonthebottomLGPfacetoobtainspatiallightuniformityabovetheoutputLGPfaceOptimizationoftheprismsheet(BEF)formaximlightoutput54DesignofLampandLampReflectorzyLampReflectorLampThedesignpurpose:maximallightinputintotheLGPface55DesignofLampandLampReflectorINITIALshapeofLampandLampReflectorisspecifiedbythefollowingparameters:Designcriteria:maximallightinputintoLGPIlluminanceinaplanebehindtheinputLGPfacefortheINITIALshape:1designstep:IncreaseverticalaxisoftheellipticalpartofthelampreflectorIlluminancefordesignstep2:IlluminancefortheFINALdesignstep:2designstep:IncreasetheelseverticalaxisofthelampreflectorFinaldesignstep:shiftthelamptoLGPIlluminancefordesignstep1:CompareIlluminanceforboththeINITIALandFINALvariants.Itisseenthatthedesignpurposeisachieved.56Exampleof1DDesignofOPTOSMicrogeometryLGPwithpyramidaldimplesonthebottomfaceLampandLampReflectorReflectorboxThedesignpurpose:LuminanceuniformityabovetheoutputLGPfaceThedesignparameters:1DdimplesdistributionismodifiedacrossthelampAbacklightwithCCFL571DFunctionspecifyingadistributionofmicrodimplesFunctionspecifyingconstantsizesofdimplesFunctionspecifyingvariablesizesofdimplesExampleof1DDesignofOPTOSMicrogeometry58Designsteps:DimplessizesfortheINITIALstepLuminanceforINITIALstepDesignstep1:DecreaseofdimplesizesnearthelampLuminanceforstep1LuminancefortheFINALstepINITIAL&FINALvariants

FINALstep:AmoreoptimaltuningExampleof1DDesignofOPTOSMicrogeometry59Exampleof2DDesignofOPTOSMicrogeometryThedesignparameters:a2DdistributionofdimplesismodifiedalongbothdirectionsLGPwithpyramidaldimplesonthebottomfaceLEDspanelReflectorboxThedesignpurpose:auniformlightdistributionabovetheoutputLGPfaceLEDemittingareaAbacklightwithLED

60A2DTableFunctionspecifiesadistributionofmicrodimplesSpecificationofdimplesizesinthecellsofthe2DtableThelesserdimplesizeinthemiddleofLGPExampleof2DDesignofOPTOSMicrogeometry61Designsteps:INITIALstep:Sizesofdimplesareconstant1DLuminancefortheINITIALstepStep1:IncreasingoftableresolutionacrosstheLEDplatetoreducedimplesizesnearLED1DLuminanceforstep1.Theresultisuniform2Dluminanceforthesamestep1isnonuniformFINALstep:IncreasingoftableresolutionalongtheLEDplatetoprovideuniformluminancenearLEDs2DLuminancefortheFINALstepExampleof2DDesignofOPTOSMicrogeometry62ExampleofBacklightwithSpecialFilmsSimulationDiffusesheetPrismsheet(BEF)Amodelofbacklightwithfilms.63SimulationofDiffusefilms.UsageofBi-directionalScatteringDistributionFunction(BSDF)BSDFpropertiesprovidingsimulationofanycomplexscattering(isotropic&anisotropic)propertiesoffilms:DiffusefilmsigmasigmaNormalLightreflectedbyoneofsideofdiffusefilmLightreflectedbyanothersideofdiffusefilmIncidentlightIncidentlightdouble-sidedfunctionallowingforspecificationofdifferentpropertiesfordifferentfilmsidesTopviewDiffusefilmNormalReferencedirectionpsisigmaNormalLighttransformedbydiffusefilmIncidentlightIncidentlightINTEGRAprovidesmeasurementsofBSDFfordifferentfilms.ReflectionTransparencyINTEGRA’smeasurementofBSDFforarealdiffusesheetusedinbacklightdevicemulti-dimensionalfunctiondependingonincidentdirectiondefinedbysigmaand

psiangles64ExampleofBEFSheetDesignTherealgeometryofaBEFisspecifiedviaOPTOSmicrostructureXvYvObservationdirectionThetablespecifiesaprismprofileThedesignpurpose:maximalefficiencyoflightoutputinnormaldirection65LuminanceforabacklightwithoutfilmsExampleofBEFDesignLuminancefortheINITIALstepLuminancefortheFINALstepDesignsteps:BacklightwithoutfilmsBacklightwithadiffusefilmandaninitialshapeofaBEFBacklightwithadiffusefilmandadesignedFINALshapeofaBEF66AngularLightDistributionofBacklightDevicewithBEFAngularIntensityfortheINITIALBEFgeometryAngularIntensityfortheFINALBEFgeometry10

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ObservationdirectionObservationdirectionTopviewofabacklightfortheINITIALstepTopviewofabacklightfortheFINALstep67OBSERVERS:InterrogationofLightingDistributionsObservers(orSensors)interrogatevariouskindsofcalculatedphotometricquantitiessuchas(il)luminance,intensity,andvisualizespatialdistributionsofanypartofthescene.Planeill/luminanceobservercalculates2Dspatialdistributionofill/luminanceoverthespecifiedplaneGonioobservercalculates2DangularintensitydistributionoverwholesphereforthespecifiedobjectLineobservercalculates1Dspatialill/luminancedistributionSectorobservercalculates1Dangularluminancedistribution68OBSERVERS:Visualization

AsimageGonioobserver

AscolorfringeAbacklight

LuminanceobserverAsgraphAsimageAspolargraphAsCartesiangraphAscolorfringe69OBSERVERS:VisualizationAngularluminancedistributionontheSectorobserver1DspatialluminancedistributionontheLineobserver70OBSERVER:ComparisonwithMeasurements

PlaneIlluminance/LuminanceObserversConceptuallyObserversareanequivalentofanopticalsensorArealvariantofluminancemeasurementscheme:ObserverplaneLightisaccumulatedincells.Cellsizescorrespondtothemeasuringspot.ViewingdirectionLightisaccumulatedinthecone.Itcorrespondstothemeasuringangle.

LuminanceobserverViewingdirection71Gonioobserverisananaloguetoaplaneluminanceobserverinrespecttomeasurements.OBSERVER:ComparisonwithMeasurements

GonioObserverLightisaccumulatedincellsofagoniosphere.Anangularsizeofacellcorrespondstomeasuringangle(anangularresolutionofameasuringdevice).Gonioobservercanbeattachedtoanysceneobjectandthisobjectaccumulatesthelights.Theobjectsizecorrespondstothemeasurementsspot.72Line&SectionObservers

Lineobserverinterrogates(il)luminancedistributionalongastraightlinedeterminedfromcameraposition.Sectionsectorobservermakesitpossibletoextracttheone-dimensionalluminancedistributionasafunctionoftheviewingdirectioninagivenplane.Theseobserversareoftheoreticalnatureasthe“sensor”ofthelightintheinfinitesmallpointsandangulardirections.73Accuracyisdefinedasdeviationofcalculatedvaluefromidealobtainableafterinfinitelongcalculation.Accuracyismonitoredduringcalculations.Thereareallnecessarystopcriteriabytime,byaccuracyandbynumberofraystracedfromlightsourcesornumberofregisteredhitsonobserverspecifiedasaccuracysource.AccuracyanditsControlObserverwhereaccuracyiscontrolledCurrentcalculationtimePredictedtimetoachieverequiredaccura