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时间:2020-03-27
《直下式LED背光源模组第二扩散导光板光学特性分析_肖箫.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、光电子·激光第24卷第4期2013年4月JournalofOptoelectronics·LaserVol.24No.4April2013直下式LED背光源模组第二扩散导光板光学特性分析肖箫1,文尚胜1,2,陈建龙1,姚日晖1,2*(1.华南理工大学高分子光电材料与器件研究所,广东广州510640;2.华南理工大学发光材料与器件国家重点实验室,广东广州510640)摘要:针对直下式发光二极管(LED)背光源模组均匀度低且模组厚度大的缺点,提出了加入第2扩散导光板的直下式LED背光源模组,并采用九点取值法及TRACEPRO软
2、件,模拟了第2扩散导光板入光面及出光面、高度和厚度对背光源模组光特性的影响。结果表明,第2扩散导光板的入光面及出光面对背光源模组均匀度的提升影响较大。当入光面采用凹陷结构、出光面采用弯曲结构时,有利于增大模组均匀度;且模组的均匀度分别随凹陷结构半径的减小和弯曲结构半径的增大而增大。而其高度和厚度主要影响背光源模组的光斑显示效果,随着高度的增加,光斑范围增大,暗区团逐渐减小;随着厚度的增加,照度最大值增大但亮点增多,产生亮暗不均的现象,从而影响了背光的主观效果。关键词:直下式发光二极管(LED)背光源模组;第二扩散导光板;均
3、匀度;光斑中图分类号:O439;TN873+.93文献标识码:A文章编号:1005-0086(2013)04-0679-08Opticalperformanceofsecondarylightguide-diffusivecomponentindirectLEDbacklightmodule1,WENShang-sheng1,2,CHENJian-long1,YAORi-hui1,2*XIAOXiao(1.InstituteofPolymerOptoelectronicMaterialsandDevices,SouthCh
4、inaUniversityofTechnology,Guangzhou510640,China;2.StateKeyLaboratoryofLuminescentMaterialsandDevices,SouthChinaUniversityofTechnolo-gy,Guangzhou510640,China)Abstract:Accordingtothesituationoflowuniformityandlargethicknessofdirect-typeLEDbacklightmodule(BLM),optica
5、lsimulationsbasedonnine-valuemethod,combinedwithTraceProareperformedtoinvestigateopticalpropertiesofsecondarylightguide-diffusivecomponentindirect-typeLEDBLM.Effectsofincidentsurface,exitsurface,heightandthicknessofsecondarylightguide-diffusivecomponentonopticalpe
6、rformanceofdirect-typeLEDBLMarestudiedtheoretically.Simulationsrevealthattheu-niformityofdirect-typeLEDBLMismainlydependentontheincidentsurfaceandexitsurfaceofthesecondarylightguide-diffusivecomponent.Theuniformityisincreasedwhentheincidentsurfaceisde-pressionstru
7、ctureandexitsurfaceisbendingstructure,andtheuniformityhasslightincreaseasradiusofdepressionstructuredecreasingandradiusofbendingstructureincreasing,respectively.Theheightandthicknessofthecomponentcaninfluencethefaculadisplayeffectofdirect-typeLEDBLU.Theboundaryoff
8、aculaisslightlyexpandedandthedarkspacegroupisshrinkedastheheightofcomponentincreases.Theilluminationmaximumandnumberoflightspotsincreaseasthethicknessof
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