Thermal simulation of alternating current light emitting diodes

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	Thermal simulation of alternating current light emitting diodes
	Deng, Hui ; L眉, Yijun ; Gao, Yulin ; Zhu, Lihong ; Chen, Yingliang ; Lin, Yue ; Guo, Ziquan ; Wang, Kai ; Chen, Guolong ; Chen, Zhong ; Gao YL(高玉琳) ; Zhu LH(朱丽虹) ; Chen GL(陈国龙) ; Chen Z(陈忠)
刊名	http://dx.doi.org/10.3788/AOS201232.0623001
	2012
关键词	Finite element method Heat resistance Optical devices
英文摘要	Alternating current light emitting diodes (AC-LED) have attracted more and more attentions due to the advantage of free of alternate current (AC)/direct current (DC) converter in practical application. With the increase of input power, the rising junction temperature will have negative influence on the the luminous flux, the optical power, the lifetime and other parameters of LED. Therefore, the understanding of the principle of accurate temperature rise of AC-LED is the key to the chip design. The finite-element analysis software (FloEFD) is used to simulate the transient thermal properties of 1 W white AC-LED driven by DC and AC power respectively. The results show that the junction temperature of AC-LED driven by AC power, fluctuates periodically around that driven by DC power and the fluctuation frequency is the same as that of the input signal, but with an apparent phase shift. Meanwhile, the variation of junction temperature of AC-LED driven at different powers and frequencies shows that the average junction temperature and its fluctuation amplitude increases linearly with the input power at steady state, however, decreases with the increase of frequency.
语种	英语
出版者	Chinese Optical Society
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/92152]
专题	物理技术－已发表论文
推荐引用方式 GB/T 7714	Deng, Hui,L眉, Yijun,Gao, Yulin,et al. Thermal simulation of alternating current light emitting diodes[J]. http://dx.doi.org/10.3788/AOS201232.0623001,2012.
APA	Deng, Hui.,L眉, Yijun.,Gao, Yulin.,Zhu, Lihong.,Chen, Yingliang.,...&陈忠.(2012).Thermal simulation of alternating current light emitting diodes.http://dx.doi.org/10.3788/AOS201232.0623001.
MLA	Deng, Hui,et al."Thermal simulation of alternating current light emitting diodes".http://dx.doi.org/10.3788/AOS201232.0623001 (2012).