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.
出处
《半导体光电》
CAS
CSCD
北大核心
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)
关键词
可调色温
高显色指数
LED白光
PWM调光
tunable color temperature
color rendering index
white LED
PWM dimming
