摘要
Angularcoloruniformity(ACU)isakeyfactorusedtoevaluatethelightqualityofwhite-lightemittingdiodes(LEDs).Inthisstudy,anoveldoubleremotemicro-patternedphosphorfilm(doubleRMPPfilm)wasusedtoenhancetheACUofaremotephosphor(RP)down-lightlamp.AconventionalRPfilmandremotephosphorfilmwithsinglemicro-patternedfilm(singleRMPPfilm)alsowereexaminedforcomparison.Theangularcorrelatedcolortemperature(CCT)distributionsandtheopticalperformanceofthefilmswereexperimentallymeasured.ThemeasurementresultsshowedthatdoubleRMPPfilmconfigurationexhibitedbettercoloruniformitywithaCCTdeviationofonly441K,comparedwith556KforthesingleRMPPfilmconfigurationand1390KfortheRPfilmconfiguration.AsimulationbasedonFDTDandraytracingcombinedmethodalsoconfirmedtheACUimprovement.Inaddition,comparedwiththeconventionalRPfilm,theluminousefficiencyofsingleanddoubleRMPPfilmconfigurationswasincreasedby6.68%and4.69%,respectively,atadrivingcurrentof350mA.TheenhancementoftheACUandluminousefficiencyareduetothescatteringandmixingeffectofthemicropatternedfilm.Moreover,thedoubleRMPPfilmconfigurationhadbetterCCTstabilityatdifferentcurrentsthantheothertwoconfigurations.TheresultsdemonstratedtheeffectivenessandsuperiorityofdoubleRMPPfilminwhiteLEDapplications.
出版日期
2016年04月14日(中国期刊网平台首次上网日期,不代表论文的发表时间)