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1、led背光源亮度均匀性改善方法（MethodforimprovingbrightnessuniformityofLEDbacklightsource）ThisarticleiscontributedbyherangpingPdfdocumentsmayexperiencepoorbrowsingontheWAPside.ItisrecommendedthatyoufirstselectTXT,ordownloadthesourcefiletothelocalview.VACUUMELECTRONICSvacuumelectroni
2、ctechnologySpecialtopicsondisplaytechnologyMethodforimprovingbrightnessuniformityofLEDbacklightsourceLiuQianFei,1,ZhangXiaoning,1,2,LiuChunliang,1,DingXing,2(11、KeyLaboratoryofElectronicPhysicsanddevices,Ministryofeducation,Xi'anJiaoTongUniversity,Shaanxi,Xi'an710049;
3、21,RainbowGroupTechnologyCenter,Beijing100085)Improvement,F,or,Lightness,Unif,ormity,of,L,Backlight,EDL,IU,Qian2fei1,ZHAN,G,Xiao2ning1,2,L,IU,Chun2liang1,D,IN,G,NG2,Xing2lo1.KeyLaboratoryof(PhysicalElectronicsandDevicesoftheMINISTryofEducationXIJIaotongU"NiversityanXI
4、'710049,ChiNa2.TechnologyCentre;ofIRICOGrouP,BEIjing100085Chi,naan)Lated,and,optimized.,The,s,of,t,he,light,ness,uniformit,y,for,n2arrangement,of,L,ED,show,s,no,t,hat,t,he,light,ness,,uniformit,y,can,calculating,be,achieved,result,above,...Methodforimprovingbrightness
5、uniformityofbacklightsource.Onthebasisofequaldistancearrangement,bymeasuringthebrightnessdistributionfunctionofasingleLED,thebrightnessuniformityofthescreeninhorizontalandverticaldirectionscanbecalculatedtobemorethan90%.ThedistancebetweenLandEDisarrangedatdifferentdis
6、tances,andthedistanceisoptimizedandadjusted.TheunevenuniformityofLEDbacklightbrightnessiscalculatedbysimulation,andtheresultsshowthatthewholeofthebacklightsourceColumnsaregenerallyequidistant,butsucharrangementcausespoorbrightnessuniformityofthebacklight,especiallyatt
7、heedgeoftheLEDbacklight,wherebrightnessdropsrapidly.LEDspacedevenlyarranged,themiddleregionisasuperpositionofbrightnessaroundotherareasofbrightness,whiletheedgeareawillbesuperimposedbrightnessofotherregions,butbecausetheLEDisapointlightsource,thebrightnessdistribution
8、ofattenuationisveryfast,withtheincreaseofdistance,therefore,theluminancecomponentofsmalloverlayedgeregion,sothatthebrightnes
