Estimation of the average junction temperature of two phosphors-converted white LED array based on (B plus Y plus R)/B ratio

	Estimation of the average junction temperature of two phosphors-converted white LED array based on (B plus Y plus R)/B ratio
	Ke, H. L.; L. Jing; J. Hao; Q. Gao; Y. Wanga; X. X. Wang; Q. Sun and Z. J. Xu
	2016
发表期刊	Solid-State Electronics
卷号	121
摘要	An accelerated aging test is the main method in evaluation of the reliability of light-emitting diodes (LEDs), and the first goal of this study is to investigate how the junction temperature (Tj) of the LED varies during accelerated aging. The Tj measured by the forward voltage method shows an upward trend over the aging time, which gives a variation about 6 degrees C-8 degrees C after 3,000 h of aging under an ambient temperature of 80 degrees C. The second goal is to investigate how the variation of Tj affects the lifetime estimation. It is verified that at a certain aging stage, as Tj increases, the normalized luminous flux linearly decreases with variation rate of microns (mu) (1/degrees C). Then, we propose a method to modify the luminous flux degradation with the Tj and mu to meet the requirements of a constant degradation rate in the data fitting. The experimental results show that with the proposed method, the accelerated lifetimes of samples are bigger than that of the current method with increment values from 8.8% to 21.4% in this research. (C) 2016 Optical Society of America
文章类型	期刊
收录类别	SCI ; EI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/57000
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Ke, H. L.,L. Jing,J. Hao,et al. Estimation of the average junction temperature of two phosphors-converted white LED array based on (B plus Y plus R)/B ratio[J]. Solid-State Electronics,2016,121.
APA	Ke, H. L..,L. Jing.,J. Hao.,Q. Gao.,Y. Wanga.,...&Q. Sun and Z. J. Xu.(2016).Estimation of the average junction temperature of two phosphors-converted white LED array based on (B plus Y plus R)/B ratio.Solid-State Electronics,121.
MLA	Ke, H. L.,et al."Estimation of the average junction temperature of two phosphors-converted white LED array based on (B plus Y plus R)/B ratio".Solid-State Electronics 121(2016).

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