基于LED的直下式动态LCD背光源  

Direct Dynamic LCD Backlight Based on LED

作　　者：刘佳尧[1] 钱可元[1] 韩彦军[2] 罗毅[1] 

机构地区：[1]清华大学深圳研究生院半导体照明实验室,广东深圳518055 [2]清华大学电子工程系清华信息科学与技术国家实验室(筹)/集成光电子学国家重点实验室,北京100084

出　　处：《液晶与显示》2008年第4期448-452,共5页Chinese Journal of Liquid Crystals and Displays

基　　金：国家自然科学基金(No60536020;60723002);国家重点基础研究发展计划"973"(No2006CB302801;2006CB302804;2006CB302806;2006CB921106);国家高技术研究发展计划"863"(No2006AA03A105);北京市科委重大计划(NoD0404003040321)

摘　　要：对液晶显示来说,与静态背光源相比,直下式动态背光源具有多种优点。提出了一种基于LED的直下式动态背光源结构,将单个LED发出的光投射区域限制在散光膜的单一区域,即每个LED只负责液晶部分区域的背光照明。基于该结构,对240mm×180mm尺寸的背光源仿真结果进行了理论分析,结果表明其亮度均匀度达到93.1%,ΔU′V′小至0.003545,完全满足背光源应用要求。Direct dynamic backIights have significant advantages over static backlights for liquid crystal display （LCD）. This study introduced a structure of direct dynamic backlights based on LEDs, in which the light emission of every LED was restricted to a smaller area on the diffuser film and every LED was only responsible to illuminate one part of LCD. Based on this structure, a 240 mm× 180 mm backlight model was analyzed theoretically. The simulation results showed that the uniformity of luminance can reach as high as 93.15, and △U＇V＇ can decrease to 0.003 545, which completely satisfies the requests of backlight＇s applications.

关 键 词：背光源 LED 直下式 动态 动态模糊 

分 类 号：TN312.8[电子电信—物理电子学] TN383