交流发光二极管(AC-LED)结温的测试方法  

Methodology of Junction Temperature Characterization of Alternating Current Light-Emitting Diodes

作　　者：徐阁[1] 于德鲁 邹兵[1] 许键[1] 

机构地区：[1]上海理工大学教育部光学仪器与系统工程研究中心,上海200093

出　　处：《照明工程学报》2014年第3期38-41,共4页China Illuminating Engineering Journal

基　　金：国家自然科学基金资助项目(项目编号:610728007)

摘　　要：目前对交流发光二极管(AC-LED)的结温测试少有研究。将一种新的电学测试方法——阈值电压法应用到AC-LED结温测试当中,并与传统的峰值波长法进行对比。两种测试方法的结温测试结果相差在4℃之内,有较好的一致性。经过分析,当参考阈值电流为1mA时,阈值电压法的测试误差为±2.5℃,峰值波长法的测试误差为±6℃。阈值电压法测试结果更为精确,应用范围更广,更适用于工业测试。At present, the measurement techniques of the junction temperatures of light emitting diodes （LEDs） are developed for AC-LED. In the present work, a novel approach of threshold voltage method is proposed for junction temperature characterization of AC-LEDs. The new method was tested, and results of which were compared with the traditional peak wavelength method, showing a good agreement within 4℃. Further analysis suggested that the error of the threshold voltage method can be narrowed down to ± 2.5 ℃ when the reference current is chosen as - 1 mA. It is coneluded that the method of threshold voltage is accurate and simple to implement, making it highly suitable for determining the junction temperatures of AC-LEDs in industry.

关 键 词：AC-LED 结温 测试方法 峰值波长法 阈值电压法 

分 类 号：TN312.8[电子电信—物理电子学]