摘要
随着节能技术的发展,LED作为一种半导体照明技术,得到研究者的关注。以此为背景,针对LED灯工作过程中产生大量热量的散热技术开展研究。基于LED正向电压随温度变化的原理,运用电学法,以1W普通正装GaN基LED为例,对其温度系数和正向压降进行测量,分析得出热阻与结温值。并利用红外热像仪法和管脚温度法对电学法测温结果进行了验证,证明了该方法的测温精度。
With the development of energy-saving technologies,LED,as a technology of semiconductor lighting,has got concern by researchers.Under this background,the heat dissipation technology of LED is studied on the mass heat produced when it woks.Based on the relationship between LED forward voltage and the temperature,the electrical measurement method is presented in this paper.By measuring the temperature coefficient and the forward voltage of 1W ordinary GaN-based LED,the thermal resistance and junction temperature are analyzed and obtained.Finally,the accuracy of this measurement method is verified by comparison with the infrared thermal imaging method and pin temperature method.
出处
《常州大学学报（自然科学版）》
CAS
2016年第2期88-92,共5页
Journal of Changzhou University：Natural Science Edition
基金
常州市2012自然科学基金资助(CJ20120024)
关键词
功率型LED
结温
热阻
电学法
high-power LED
junction temperature
thermal resistance
electrical measurement method
