直下式LED背光模组的超薄设计  

Ultra-thin design of direct-lit backlight unit

作　　者：李德君[1,2] 刘刚 吕国强[3] 方旭东 冯奇斌[3] 

机构地区：[1]合肥工业大学仪器科学与光电工程,安徽合肥230009 [2]合肥京东方显示光源有限公司,安徽合肥230012 [3]特种显示技术教育部重点实验室特种显示技术国家工程实验室现代显示技术省部共建国家重点实验室,安徽合肥230009

出　　处：《液晶与显示》2014年第6期1101-1105,共5页Chinese Journal of Liquid Crystals and Displays

基　　金：安徽省2012科技计划资助项目(No.1206c0805007)

摘　　要：为减少混光距离进而获得超薄直下式LED背光模组,提出一种具有逆棱微结构的扩散板。对这种逆棱微结构进行了光学理论分析,证明了该结构在降低混光距离方面具有可行性。对逆棱微结构扩散板的光学效果进行了实验验证,并用于81.3cm(32in)LED背光模组。实验结果表明:该结构扩散板可有效增大灯影光圈,相对无结构扩散板,光圈直径增大约10%;在达到相同混光效果时,具有该结构扩散板的混光高度降低;采用该逆棱微结构的扩散板的背光模组混光高度由13mm降低至11.8mm。采用具有逆棱微结构的扩散板有助于实现LED背光模组的超薄设计。In order to reduce optical distance（OD）and realize ultra-thin design of direct-lit LED backlight module,this paper proposes a kind of diffuser plate with prism-based micro-structure on the bottom.The optical theoretical analysis is first performed on the prism-based micro-structure,which proves to be feasible to reduce the OD.The prism-based micro-structure is then practically tested and utilized in 81.3cm（32in）LED backlight.Experimental results show that the diffuser plate with prism micro-structure has effect on increasing the diameter of LED shadow by about 10%and reducing OD.The OD of the prototype with 32 in LED BLU is reduced from 13 mm to 11.8mm.Such diffuser plate with prism-based micro-structure can help to realize the ultra-thin design.

关 键 词：直下式LED背光模组 环形逆棱镜微结构 超薄设计 

分 类 号：TN27[电子电信—物理电子学]