摘要
提出了一种基于脉冲宽度调制(PWM)的三基色发光二极管(LED)调光调色计算模型,建立了混合光的色品坐标与占空比、相关色温与占空比、最大光通量与色品坐标的函数关系。采用红绿蓝(RGB)三基色LED进行实验验证,实验结果表明:计算模型能较好的指导LED光色调节,混合光色品坐标的理论值和测量值之间的误差小于2.5%,模拟太阳光的色温变化误差仅为50 K。该计算模型可应用于各种三通道LED的调光调色,其高精度的优点能更精确地实现智能照明,极具实用价值。
This paper presents a dimming method that based on three channels＇ pulse-width modulation （PWM） and light-mixing technology. A quantitative calculation model is established among chromaticity coordinate, correlated color temperature and three channels＇ duty cycles. The functional relationship between chromaticity coordinate and maximum luminous flux is also setuped. This method has been verified favorably by light mixing experiments with tricolor LED, which shows that the deviation of chromaticity is less than 2.5% between the theoretical value and the measured value. In addition, the color temperature change of sunlight has been simulated by this quantitative calculation model, and the deviation of CCT is less than 50 K. This model with the advantage of high precision can be applied to various types of LED dimming color and has a beneficial value for practicality.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2015年第2期285-292,共8页
Acta Optica Sinica
基金
广东省战略性新兴产业专项(2011A081301017
2012A08034012
2012A080304001)
广州市科技计划项目(2013J4300021)
关键词
光电子学
动态色温
三基色配光
发光二极管
脉冲宽度调制
占空比
optoelectronics
dynamic color temperature
tricolor light mixing
light emitting diode
pulse-width modulation
duty cycle
作者简介
宋鹏程（1990-），男，硕士研究生，主要从事LED智能照明方面的研究。E-mail：spcscut@163．com
导师简介：文尚胜（1964-），男，博士，教授，主要从事有机及无机半导体材料与器件方面的研究。E-mail：shshwen@scut．edu．cn（通信联系人）
