基于PWM调光的高显色性白光LED混光优化方法  

Optimization Dimming Method of Mixed Light for White Light Emitting Diode with High Color Rendering Index Based on Pulse Width Modulation

作　　者：田会娟[1,2] 胡阳[2,3] 陈陶 柳建新 蔡敏鹏 关涛 TIAN Hui-juan;HU Yang;CHEN Tao;LIU Jian-xin;CAI Min-peng;GUAN Tao(Tianjin Key Laboratory of Advanced Electrical Engineering and Energy Technology,School of Electrical Engineering and Automation,Tiangong University,Tianjin 300387,China;Engineering Research Center of Ministry of Education on High Power Solid Lighting Application System,Tianjin 300387,China;School of Electronics and Information Engineering,Tiangong University,Tianjin 300387,China;Tianjin Chengke Transmission Electromechanical Technology Co.,Ltd.,Tianjin 300384,China)

机构地区：[1]天津工业大学电气工程与自动化学院,天津市电工电能新技术重点实验室,天津300387 [2]大功率半导体照明应运系统教育部工程研究中心,天津300387 [3]天津工业大学电子与信息工程学院,天津300387 [4]天津成科传动机电技术股份有限公司,天津300384

出　　处：《发光学报》2019年第12期1538-1545,共8页Chinese Journal of Luminescence

基　　金：国家自然科学基金(61504095)资助项目~~

摘　　要：提出了一种基于脉冲宽度调制(PWM)的红/绿/蓝/暖白(R/G/B/WW)四色发光二极管(LED)白光混合方法。该方法根据多基色混合白光光源相对光谱功率分布(SPD)符合线性叠加原理,采用1931 CIE-XYZ三刺激值建立混合光中各光源色坐标与贡献率的关系。在优化目标显色性能最佳时,建立混合光的光通量与占空比的函数关系,并采用R/G/B/WW四色LED进行实验验证。结果表明,R/G/B/WW LED模块可实现一般显色指数Ra在95以上、其最大相对误差为1.35%、相关色温在3000~7000 K、光通量为200~1000 lm、发光效率在170~240 lm/W范围变化的白光调节。This paper proposes a method of white light mixed for red/green/blue/warm-white(R/G/B/WW)light emitting diode(LED)based on pulse width modulation(PWM).According to the principle of linear superposition of the relative spectral power distribution(SPD)of multi-color white LED,the proposed model adopts 1931 CIE-XYZ tristimulus to determine the relationship between the color coordinate and the rate of contribution for each channel of the LED clusters.When the color rendering performance is optimized,the functional relationship between luminous flux and duty cycles of the mixed light is established.And the experimental verification is carried out with R/G/B/WW LED clusters.The experimental results show that R/G/B/WW LED model can realize that the color rendering index Ra is larger than 95 and its m aximum relative error is 1.35%,the correlation color temperature(CCT),the luminous flux and the luminous efficiency change in the range of 3000~7000 K,200~1000 lm,170~240 lm/W,respectively.

关 键 词：光学器件 脉冲宽度调制 发光二极管 高显色指数 

分 类 号：TN206[电子电信—物理电子学]