红/绿/蓝/暖白4色LED白光温度光谱优化方法  

Temperature Spectrum Optimization of Mixed White LED Cluster Comprising Red/Green/Blue/Warm White LED

作　　者：田会娟 张新华[1,2] 张晋 Tian Huijuan;Zhang Xinhua;Zhang Jin(Tianjin Key Laboratory of Optoelectronic Detection Technology and System,School of Electronics and Information Engineering,Tiangong University,Tianjin 300387,China;Engineering Research Center of Ministry of Education on High Power Solid State Lighting Application System,Tianjin 300387,China)

机构地区：[1]天津工业大学电子与信息工程学院天津市光电检测技术与系统重点实验室,天津300387 [2]大功率半导体照明应用系统教育部工程研究中心,天津300387

出　　处：《光学学报》2023年第9期261-268,共8页Acta Optica Sinica

基　　金：国家自然科学基金(61504095);天津市教委科研计划(2019ZD08)。

摘　　要：研究了一个基于高斯模型和双高斯模型的温度变化光谱模型,并基于脉冲宽度调制(PWM)调光的红/绿/蓝/暖白(R/G/B/WW)4色LED混合白光进行了实验验证。结果表明,在20~90℃温度范围内,当相关色温为3000、5000、6500 K时,光源参数(照度、显色指数、相关色温、蓝光危害因子和节律因子)的最大相对误差为3.79%。基于该模型,采用自适应差分进化(JADE)算法获取R/G/B/WW发光二极管在不同温度下的补偿占空比,并建立光谱优化模型以消除温度对光源光谱及其光源参数的影响。结果表明,优化补偿后的光谱与初始温度光谱基本一致,光源参数最大相对误差为2.62%。Objective Light emitting diode(LED)features high luminous efficiency,adjustable luminance and color temperature,fast response,and long life,and it is widely applied in various fields.During the operation of LED light sources,the temperature change exerts an impact on its emission spectrum and energy efficiency.In previous studies,the designs of heat dissipation structures are mainly adopted to reduce the impact of temperature on LED luminous efficiency and performance.Some researchers have also employed other methods to study the impact.A closed-loop negative feedback system is designed to reduce the influence of temperature on the spectrum of the light source,and the temperature spectrum compensation method of RGBY four-color LED light source is proposed based on visual and non-visual effects.The white LED for lighting is mostly obtained by blue excited yttrium aluminum garnet phosphor.However,its color temperature cannot be adjusted and color rendering is poor.A mixed white LED cluster can achieve dynamic adjustment of color temperature and high color rendering index.Therefore,the optimization method of multi-channel LED white light with tunable color temperature and high color rendering index has been extensively studied.However,the influence of the thermal effect on the optical parameters of a mixed white LED is rarely considered.Thus,this paper studies the impact of temperature on the spectrum of red/green/blue/warm-white(R/G/B/WW)four-color LED and obtains the spectral model with temperature change.Additionally,the spectral optimization model of R/G/B/WW LED mixed white light is built by the adaptive differential evolution(JADE)algorithm based on the temperature and duty ratio,and it is verified through experiments.Methods The experimental setup mainly consists of microcontroller(MCU),R/G/B/WW LED light source,integrating sphere,HASS-2000 spectral radiometer,and CL-200 temperature control device.Two R/G/B/WW four-color LED clusters are connected in series.The MCU can generate four different pulse width modu

关 键 词：光谱学 光谱优化模型 发光二极管 温度 脉冲宽度调制 自适应差分算法 

分 类 号：TN383[电子电信—物理电子学] TU113[建筑科学—建筑理论]