2002/8/14PreparedbyClioTseng1BLU_培训资料曹玉荣2010.5.272002/8/14PreparedbyClioTseng2ContentStructure(结构)LightGuide(导光板)Films(膜片)CCFL/LED(冷阴极管/发光二极管)Reflector(放射片)Chromaticity(色谱)Mura(干涉,条纹等)2002/8/14PreparedbyClioTseng3Structure因液晶本身不發光,所以需要一背光源使其顯示。目前EdgeType背光板主要是將冷陰極管(LED)之線光源經由導光板之全反射而成一均勻面光源。backlightcell2002/8/14PreparedbyClioTseng4Structure-monitortypeBEFIIIDiffuser-UDiffuser-LLightGuidePatternWhite-sheetCCFLReflector※LGP一般為平板外型,以刀模直接裁切成型,已漸漸引進射出成型的方式/LED2002/8/14PreparedbyClioTseng5Structure-notebooktypeBEFIIIDiffuser-UDiffuser-LLightGuidePatternWhite-sheetCCFLReflector※LGP為楔型板,直接射出成型/LED2002/8/14PreparedbyClioTseng6LightGuide為背光模組光源的傳播媒介,將CCFL/LED所發出的線光源轉換成面光源MaterialSpecificGravityTransmittanceforallwavelength(%)Waterabsorptionratio(%)RefractiveindexThermaldeformationtemperature(℃)PMMA1.2920.31.4990ZEONOR1.0192<0.011.5399*Zeonor較容易發生黃化現象Structure¤Monitor-Thickness6~8mm-Printing-SlabLG¤NoteBook-Thickness2.2~0.8mm-Non-Printing(stamper、etching)-WedgeLG2002/8/14PreparedbyClioTseng7FilmsWhite–SheetDiffuserUpperdiffuserLowerdiffuserBEFBEFII…(90/50)、(90/24)……BEFIII…(M)、(T)RBEF…(M)、(D)DBEF…(8T)、(8M)2002/8/14PreparedbyClioTseng8Film-whitesheet反射自燈管所入射的光,且反射板本身對光源亦有散射的效應。主要使用基材PETKimoto-RW188(E60L)、Tsujiden-RF188orRF125發泡PC材質3M-LH202反射率都可達90%以上。最近廠商也開發出可吸收紫外光的反射片(E60V),避免反射片CCFL所發出的紫外光照射而黃化。2002/8/14PreparedbyClioTseng9Film-DiffuserStructure使用PET或PC基材coating微小之PMMA顆粒。功用-光經其擴散可稍微將面光源均勻化,並具有遮蓋導光板上網點的作用。-具保護稜鏡片的作用,避免鏡面刮傷Diffuser-Upper保護性較高,使用穿透度高,Tsujiden-D117UEY、Keiwa-PBS070Diffuser-Lower光源擴散性,使用Haze高,Tsujiden-D121、Keiwa-100KBS2擴散片擴散層防止靜電2002/8/14PreparedbyClioTseng10Film-BEFIIStructure在PET基材上coating鋸齒狀或波浪狀的PMMA微結構功用改變光的方向以達集光效果,因而以提高亮度,單一方向增量60%,兩張垂直方向重疊可增量120%。但同時會犧牲部分亮度之視角2002/8/14PreparedbyClioTseng11Film-BEFIIIStructure與BEFII不同之處為Randompattern功用避免moire現象。集光效果,單一方向增量59%,兩張垂直方向重疊可增量111%-BEFIII90/50-T避免兩張BEF堆疊黏合-BEFIII90/50-M將BEFIII-T外貼附一層matte的擴散層,避免靜電以及干涉現象2002/8/14PreparedbyClioTseng12Film-RBEF避免BEFII直角的結構在組裝上因外力而破壞Prism的表面.而設計出圓弧狀的結構.亮度BEFII>RBEF視角RBEF>BEFII2002/8/14PreparedbyClioTseng13Film-DBEF3M專利,具有Polarizer的特性,結構由多層可反射偏極光之薄膜相互貼附而成,可改變光的極化方向,經由反射後再加以利用避免BEFII直角的結構在組裝上因外力而破壞Prism表面,而設計出圓弧狀的結構.DBEF-M主要是將DBEF表面外加Coating一層Matte,防止因靜電而產生Moire的現象DBEF-D為防止DBEF易浮曲變形而再加厚且增加上下兩層擴散層之DBEFbacklightP1P2P1P1P2P2cellDBEFGain:1.3~1.42002/8/14PreparedbyClioTseng14CCFLVisibleRaysPowerPowerElectronAr&NegasHgUltravioletRays•Lamppower=Lampcurrent*lampcurrentTotallamppower=p*CCFLnumber2002/8/14PreparedbyClioTseng15Reflector集中入射光,並將其導入導光板中,使用特殊外型可提高些微反射效率對燈管散熱有幫助Structure-業界較常使用三井東壓之黃銅及不銹鋼、MiroII,於反射面上鍍銀或貼附銀以增加反射率-ALSET材質,其主要的結構為金屬底基材貼附一般所使用的白反射片亮度提升效率ALSET>MIROII>三井東壓2002/8/14PreparedbyClioTseng16Chromaticity2002/8/14PreparedbyClioTseng17MuraKidomuraP-muraDarkLinePrismShiftEarmuraHornmuraRainbowmura2002/8/14PreparedbyClioTseng18KidoMuraLG-patternLG-pattern2002/8/14PreparedbyClioTseng19KidoMuraReflectorDeformation2002/8/14PreparedbyClioTseng20P-MuraFilmwavy2002/8/14PreparedbyClioTseng21Dark-LineLG-patternNoLG-patternA/AReflectorDeformation2002/8/14PreparedbyClioTseng22Dark-LineDiffuserPatternA/ADiffuserPatternDiffuserPatternA/A2002/8/14PreparedbyClioTseng23Prism-ShiftA/APrismShiftA/A2002/8/14PreparedbyClioTseng24Ear-MuraLGPConer2002/8/14PreparedbyClioTseng25Horn-MuraLGPPatternCCFL有效發光長度2002/8/14PreparedbyClioTseng26RainbowMura