摘要
功率型LED已经越来越多地运用于航空照明领域,迅速准确地获得LED的结温对航空灯具的散热设计显得极为重要。介绍了一种运用小电流K系数测量LED结温的方法。利用了LED半导体芯片的伏安特性,通过构建测量系统获得LED两端瞬间压降值来算出LED的结温。具有获得LED结温快速、准确、非破坏性等特点。
Power LED lighting has been more and more used in the field of aviation.That rapid and accurate access to the LED junction temperature is extremely important to the thermal design of aviation lamps.A kind of little current K-factor method of measuring LED junction temperature is introduced.The LED semiconductor chip volt-ampere characteristics are used.Instantaneous voltage drop of LED is obtained through the building system of the LED measurement to calculate LED junction temperature.This method can obtain LED junction temperature more rapidly and more accurately.
出处
《光学技术》
CAS
CSCD
北大核心
2012年第3期371-375,共5页
Optical Technique
关键词
航空照明
LED结温
正向压降
小电流K系数
aviation lighting
LED junction temperature
forward voltage
little current K-factor
