COB封装LED的光学性能研究  

Research on Optical Performance of LED by COB Packaging

作　　者：徐淳[1] 杨磊 曲士巍 王艺燃[1,2] 朱伟 钱幸璐 何希文[1] 万林伟 邹军[1,2] 

机构地区：[1]上海应用技术学院,上海201418 [2]浙江亿米光电科技有限公司,杭州314100

出　　处：《光电技术应用》2015年第4期16-19,共4页Electro-Optic Technology Application

摘　　要：针对LED高光效、低功耗的要求,在分析LED光学性能的基础上,采用了COB（chip on board）即板上芯片封装技术。研究了不同电流下和点亮不同时间后,分析其LED光通量、光效和色温。研究分析影响LED光学性能的因素并进行测试。结果表明,用两种色温接近3 000 K的样品,电流由500 m A增大到900 m A,色温升高了1.685%、2.626%,光通量也随着电流的变大而升高68.532%、84.625%,但相反光效却降低了13.535%、9.971%;而在电流保持不变的情况下,点亮的时间由0~1 min、0~5 min、0~10 min,其色温分别上升了0.537%、1.209%、2.384%;0.369%、1.104%、2.943%,同时,光通量分别降低1.474%、4.855%、7.493%;2.073%、3.859%、7.793%,光效也分别降低2.527%、4.617%、6.671%;2.171%、4.903%、7.579%。实验发现,电流与点亮时间直接影响LED光学性能。According to the requirements of high light efficiency and low power consumption of light-emitting diode （LED）, based on analyzing LED optical performances, chip on board （COB） technology is adopted. The lumi？nous flux, luminous efficiency and color temperature of LED are analyzed under different electric current and light？ing time. The elements influencing LED optical performances are researched, analyzed and tested. Results show that using two kinds of samples with color temperature closed to 3000 K, electric current increases from 500 mA to 900 mA, color temperature increases 1.685% and 2.626%, luminous flux also increases 68.532% and 84.625%with the increasing of the electric current, but optical efficiency decreases 13.535%and 9.971%. Under the same electric current condition, lighting times are 0~1 min, 0~5 min and 0~10 min, color temperature increases 0.537%, 1.209%, 2.384%, 0.369%, 1.104%and 2.943%respectively. Luminous flux decreases 1.474%, 4.855%, 7.493%, 2.073%, 3.859%and 7.793%respectively. Optical efficiency also decreases 2.527%, 4.617%, 6.671%, 2.171%, 4.903%and 7.579%. The experiments show that LED optical performances are directly influenced by electric cur？rent and lighting time.

关 键 词：COB 光学性能 LED 电流 时间 光谱能量分析 

分 类 号：O432.2[机械工程—光学工程]