Comparison of online and offline tests in LED accelerated reliability tests under temperature stress

	Comparison of online and offline tests in LED accelerated reliability tests under temperature stress
	Ke, H. L.; L. Jing; Q. Gao; Y. Wang; J. Hao; Q. Sun and Z. J. Xu
	2015
发表期刊	Applied Optics
卷号	54 期号:33 页码:9906-9910
摘要	Accelerated aging tests are the main method used in the evaluation of LED reliability, and can be performed in either online or offline modes. The goal of this study is to provide the difference between the two test modes. In the experiments, the sample is attached to different heat sinks to acquire the optical parameters under different junction temperatures of LEDs. By measuring the junction temperature in the aging process (T (j1)), and the junction temperature in the testing process (T (j2)), we achieve consistency with an online test of T (j1) and T (j2) and a difference with an offline test of T (j1) and T (j2). Experimental results show that the degradation rate of the luminous flux rises as T (j2) increases, which yields a difference of projected life L-70% of 8% to 13%. For color shifts over 5000 h of aging, the online test shows a larger variation of the distance from the Planckian locus, about 40% to 50% more than the normal test at an ambient temperature of 25 degrees C. (C) 2015 Optical Society of America
收录类别	SCI
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/55204
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,Q. Gao,et al. Comparison of online and offline tests in LED accelerated reliability tests under temperature stress[J]. Applied Optics,2015,54(33):9906-9910.
APA	Ke, H. L.,L. Jing,Q. Gao,Y. Wang,J. Hao,&Q. Sun and Z. J. Xu.(2015).Comparison of online and offline tests in LED accelerated reliability tests under temperature stress.Applied Optics,54(33),9906-9910.
MLA	Ke, H. L.,et al."Comparison of online and offline tests in LED accelerated reliability tests under temperature stress".Applied Optics 54.33(2015):9906-9910.

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