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运用基于蒙特卡罗的光线追迹方法,对采用“光转换”兼“多色混合”技术的白光LED的显色指数、相关色温、光通量、光辐射功率、荧光粉颗粒密度和色坐标进行了仿真计算和优化选择。通过改变红、绿、蓝三种LED芯片的组合方式和红、绿、黄三种荧光粉的混合方式及各色荧光粉的密度,在保证有合理的光通量输出的条件下,得到了不同色温区的高显色指数白光LED。从显色指数角度看,冷白、正白和暖白光应分别选择BBB芯片+绿、红色荧光粉、BBB芯片+黄、红色荧光粉和RBB芯片+黄色荧光粉组合。实验上测试了采用这几种组合方式的白光LED光谱、显色指数、色温、光通量和色坐标,实验数据与仿真结果基本吻合。
Based on the ray tracing method based on Monte Carlo, the color rendering index, the correlated color temperature, the luminous flux, the optical radiation power, the density of the phosphor particles and the color temperature of the white LED with “light conversion” and " Color coordinates were calculated and optimized selection. By changing the combination of red, green and blue LED chips and the mixture of red, green and yellow phosphors and the density of phosphors of different colors, under the condition of ensuring a reasonable luminous flux output, different color temperature zones The high color rendering index white LED. From the color rendering index point of view, cool white, white and warm white light should be selected BBB chip + green, red phosphor, BBB chip + yellow, red phosphor and RBB chip + yellow phosphor combination. Experimentally tested the white LED spectrum, color rendering index, color temperature, luminous flux and color coordinates using these combinations, and the experimental data are in good agreement with the simulation results.