可调色温的高显色指数LED白光光源的实验研究  

Experimental Study on Tunable Color Temperature White Light with High Color Rendering Index

作　　者：余建华[1] 陈日广[1] 鄂雷[1] 龚向东[1] 谌江波[1] 冯协 

机构地区：[1]深圳大学电子科学与技术学院,深圳518060

出　　处：《半导体光电》2014年第3期395-397,401,共4页Semiconductor Optoelectronics

基　　金：广东省产学研重点基金项目(2011A090200081)

摘　　要：采用暖白、绿、蓝LED混光和PWM调光技术,研究了光源的光谱、色温可调和显色指数特性。实验通过控制驱动电流的占空比,调节暖白、绿、蓝LED之间的光通量配比,实现了在3 000-6 500K范围内色温可调、Ra为85-95的高显色指数LED白光。混合光源的实验参数与理论计算值相一致。Warm white,blue and green LED mixing and PWM dimming technologies were applied to study the spectra,color temperature and color rendering index（CRI）of the mixed white light.By controlling the pulse-width of the driving current to change the luminous flux ratio among warm white,blue and green LEDs,a tunable color temperature white light with high CRI was realized experimentally,realizing a tunable color temperature range of 3 000-6 500K and a CRI range of 85-95.The experimental results agree well with the theoretical calculations.

关 键 词：可调色温 高显色指数 LED白光 PWM调光 

分 类 号：O482.31[理学—固体物理]