COB白光LED的光提取效率研究  

Study on Light Extraction Efficiency of White COB-LED

作　　者：古志良 李炳乾 范广涵 许毅钦 张康 赵维 李成驰 

机构地区：[1]中南大学物理与电子学院,长沙410083 [2]广东省工业技术研究院,广州510650

出　　处：《半导体光电》2015年第5期753-755,共3页Semiconductor Optoelectronics

基　　金：国家自然科学基金项目(11304048);广东省战略新兴产业LED专项资助项目(2012A080302002)

摘　　要：针对LED高光效、高显色指数的要求,在分析LED光学性能的基础上,采用板上芯片(COB,Chip on Board)技术研究了表面涂覆硅胶量对COB白光LED的光通量、光效、色温和显色指数的影响,并提出一种高光效、高显色指数、低色温的白光LED封装方案,提高了COB白光LED的出光效率,实现了特定的光学分布,最终实现14W COB封装结构下的白光LED,在电流密度为30A/cm2时,其色温、显色指数及光效分别为4 900K、82和125lm/W。The COB（Chip on Board）packaging technology was adopted in LED products to meet the requirements of high efficiency and high color rendering index.In this work,the influence of silicone amount on luminous flux,luminous efficiency,color temperature and color rendering index（CRI）of white COB-LED was investigated.And proposed was a kind of encapsulation method with high luminous efficiency,high CRI and low color temperature.Thus the luminous efficiency was improved and specific optical distribution was achieved.Finally,14 W white COB-LED was obtaied with the color temperature of 4 900 K,color rendering index of 82,and photosynthetic efficiency of 125lm/W respectively at the current density of 30A/cm2.

关 键 词：LED COB 硅胶量 高光效 高显色指数 

分 类 号：TN312.8[电子电信—物理电子学]