大功率LED结温与器件表面温度关系的研究  

A STUDY ON THE RELATIONSHIP BETWEEN THE JUNCTION TEMPERATURE AND SURFACE TEMPERATURE OF HIGH POWER LED

作　　者：朱简约 李乐天[1,3] 陈乾[1] 

机构地区：[1]东南大学物理国家级实验教学示范中心,江苏南京211189 [2]南京师范大学附属中学江宁分校,江苏南京211102 [3]东南大学吴健雄学院,江苏南京211189

出　　处：《物理与工程》2017年第3期18-21,共4页Physics and Engineering

基　　金：江苏省高等教育学会高校实验室研究委员会资助项目(GS2015YB21);教育部高等学校物理学类专业教学指导委员会资助项目(01-201601-35)

摘　　要：本文利用东南大学自主研发的LED热学特性实验仪,通过脉冲电流法对常见的大功率白光LED灯珠的结温和器件表面温度进行了测量,深入研究了LED灯在升温和降温过程中温度的变化规律,并给出了结温和表面温度的定量关系。一方面,该工作对工程技术领域中的相关研究有一定的实际意义;另一方面,该课题实验内容能帮助学生理解与PN结和LED相关的物理概念和基本原理,使他们体会到物理与现代工程技术的密切联系,从而激发学生对实验物理的兴趣。In this paper, based on the experimental instrument of LED thermal characteristics developed independently by the southeast university, both the junction temperature and surface temperature of the common high-power white LED lamp beads were measured by the pulse current method to determine the quantitative relationship between the junction and surface temperature. This is accomplished by measuring the repeated heating and cooling process as the thermal change is measured over several thermal cycles. On the one hand, this work has certain practical significance to the related research in engineering technology field. On the other hand, the experimental content can help students to understand the physical concepts and basic principles relevant to PN junction and LED, and help them to feel the close relation-ship between physics and modern practical engineering technology, which stimulates students＇ interest in experimental physics.

关 键 词：发光二极管 PN结 结温 表面温度 脉冲电流法 

分 类 号：TN312.8[电子电信—物理电子学]