摘要
针对板上芯片(COB)集成封装发光二极管(LED)补粉排测设备对光色参数检测的需求,研制了一套基于光纤光谱仪的LED快速光色检测系统。该系统包括光色参数检测模块、LED测试机械结构及显示模块等3个部分。光色参数检测模块主要由自制光谱仪构成,用于对测量获得的光谱数据进行计算,进而得出LED的光色参数。LED测试机械结构由积分球和可加装不同COB封装LED的夹具测试平台构成。基于该系统架构,可快速测量LED的光通量、色坐标及色温等参数。利用该设备进行了COB封装LED的快速扫描并测量了它的光色参数,期间操作者可根据实际测量结果进行相应的补粉。结果表明:在测试10颗LED时,单次测量时间少于3s;LED色坐标准确度优于±0.003,色坐标重复性小于0.000 5,色温测试精度为0.6%@5700K,色温重复性误差小于0.000 8。测试结果满足了当前大功率COB封装LED测试系统对速度、准确性和重复性的要求。
According to the demands of Chip-on-board（COB）wafer level packing Light Emitting Diode（LED）powder complement and discharge equipment for the photoelectric parameter measurement,this paper develops a self-designed fast LED photoelectric parameter measurement system based on a fiber optic spectrometer.The system consists of an optical parameter detection module,a mechanical structure of LED measurement and a display module.The optical parameter detection module mainly consists of a homemade spectrometer for acquiring the spectral data to get the chromatic parameters of the LED.The mechanical structure of LED measurement consists of an integrating sphere and a test platform to be mounted different holders of COB packaging LED.It can measure the luminous flux,color coordinates and color temperatures fast. The designed LED photoelectric parameter measurement system is used to scan the COB packaging LED and measure photoelectric parameters,meanwhile the operator can repair powders based on actual measurement results.The results for the measurement of 10 LEDs show that the single measurement time is less than 3s,the color coordinate accuracy and color coordinate repeatability are better than 0.003 and less than 0.000 5,respectively,and the color temperature precision and color temperature repeatability are 0.6% @5700Kand less than 0.000 8,respectively.It satisfies the requirements of measurement system for the high-power COB packaging LED and is characterized by fast speeds,higher accuracy and higher repeatability.
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2016年第1期39-44,共6页
Optics and Precision Engineering
基金
浙江省科技厅公益技术应用研究项目(No.2014C31114)
关键词
光色检测
发光二极管(LED)
板上芯片(COB)
色坐标
色温
光通量
chromatic parameter measurement
Light Emitting Diode（LED）
Chip-on-board（COB）
color coordinate
color temperature
luminous flux
