采用色度参数动态预测大功率白光LED结温  

Dynamic Prediction of the Junction Temperature of High-Power White LED by Chromaticity Parameters

作　　者：郭杰[1] 饶丰 曹颖 GUO Jie;RAO Feng;CAO Ying(School of Photoelectric Engineering, Changzhou Institute of Technology, Changzhou 213032;School of Innovation and Entrepreneurship, Changzhou Institute of Technology, Changzhou 213032)

机构地区：[1]常州工学院光电工程学院,江苏常州213032 [2]常州工学院创新创业学院,江苏常州213032

出　　处：《常州工学院学报》2021年第4期13-17,共5页Journal of Changzhou Institute of Technology

基　　金：国家重点研发计划(2017YFF02-10002);江苏省“333工程”科研项目(BRA2019157)。

摘　　要：结温是影响LED光色电性能的重要参数,准确测量LED结温对LED产品设计及检测至关重要。文章通过实验系统采集了GaN基白光LED在不同结温和电流下色度参数,分析了色温、色坐标随LED结温的变化趋势,建立色度参数、注入电流及结温三者间的动态预测模型,提出了采用色度参数预测大功率白光LED结温的新方法,并与正向电压法测量结果进行比对,该方法的平均标准差为5.7℃。该方法的提出为LED灯具低亮度、大环境噪声下非接触式测量提供一种新的、直观的、有效的、可行的思路。The junction temperature is an important parameter that affects the light,color and electrical properties of LED.Accurate measurement of LED junction temperature is of critical important for the design and performance detection of LED products.The chromaticity parameters of GaN based white LED are collected under different junction temperature and current through the experimental system,and then the changing trend of color temperature and color coordinate with LED junction temperature is analyzed.After that,a dynamic prediction model of chromaticity parameters,injection current and junction temperature is established,and a new method of predicting the junction temperature of high-power white LED by chromaticity parameters is finally proposed.Compared with the measurement results of the forward voltage method,the average standard deviation of this method is 5.7℃.This method provides a new,intuitive,effective and feasible idea for the non-contact measurement of LED lamps under low brightness and large environmental noise.

关 键 词：光谱学 结温测量 光谱分析 发光二极管 色坐标 

分 类 号：TN312.8[电子电信—物理电子学] O433.4[机械工程—光学工程]