图案化基板LED中荧光粉对光学性能的影响

发布时间：2018-01-11 03:15

本文关键词：图案化基板LED中荧光粉对光学性能的影响　出处：《华侨大学学报(自然科学版)》2017年05期 　论文类型：期刊论文

【摘要】：采用基板上加倒锥形图案化的新型封装方式,用蒙特卡洛光线追迹法仿真保形涂覆荧光粉体积比和厚度变化时,发光二极管(LED)光源光色品质的变化.仿真结果表明:LED光源的出光效率在图案化倾斜角α为30°,45°时,出光效率的提升量最大;α为45°时,传统平面封装光源的空间颜色均匀性最大优化幅度分别为9.1%,8.4%;荧光粉厚度、体积比不变时,颜色均匀性相对于传统平面封装光源的优化幅度最大为11.1%,10.4%,光源的色温差值最大减小1 006,1 319K;在厚度、体积比参数中任选一个进行优化,均可改善LED产品的颜色均匀性,而优化图案化结构可使空间颜色均匀性更明显地提高.
[Abstract]:A new packaging method with inverted conical pattern was used to simulate the change of volume ratio and thickness of conformal coating phosphor by Monte Carlo ray tracing method. The simulation results show that when the angle 伪 is 30 掳~ 45 掳, the maximum increase of light output efficiency can be obtained from the light-emitting diode (LED) light source, and the simulation results show that the output efficiency is the highest when the angle 伪 is 30 掳~ 45 掳. When 伪 is 45 掳, the maximum optimized amplitude of spatial color uniformity of traditional planar packaging light source is 9.1 and 8.4 respectively. When the phosphor thickness and volume ratio are constant, the optimum range of color uniformity compared with the traditional planar packaging light source is 11.1 / 10.4, and the maximum color temperature difference of the light source is reduced by 1 006. 1 319K; The color uniformity of LED products can be improved by choosing one of the parameters of thickness and volume ratio, and the spatial color uniformity can be improved more obviously by optimizing the pattern structure.
【作者单位】：华侨大学信息科学与工程学院;福建省光传输与变换重点实验室;
【基金】：华侨大学高层次人才科研启动项目(09BS103) 福建省光传输与变换重点实验室开放课题资助项目(2014202)
【分类号】：TN104.3;TN312.8
【正文快照】： 集成高功率发光二极管(LED)逐渐成为固体照明的发展趋势,白光LED的出光效率和空间颜色均匀性是业界关心的重要问题,而荧光粉涂覆工艺是影响LED光色品质的最重要因素[1-2].为了提高LED光源的出光效率,Li等[3]在平面基板上做图案化结构,破坏出光界面的全反射,使出光效率提高42%.

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