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《Chinese Journal of Luminescence》 2014-09
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Reliability Assessment of LED Lamp Based on Acceleration Degradation Test

XIAO Cheng-di;LIU Chun-jun;LIU Wei-dong;ZHAO Zhi-wei;LIU Gui-ping;School of Mechatronics Engineering,Nanchang University;Zhuhai Gree Electric Appliances Co. LTD.;  
A rapid reliability evaluation method of LED lamp was proposed based on the acceleration degradation test. In order to evaluate the service life of lamps,the accelerated degradation test( ADT) was conducted under the integrated stress of temperature-electrical,and a general procedure for an accelerated degradation test was used to analyze the useful lifetime of LED lamps under operating conditions through analyzing the lumen maintenance data collected from ADT. The reliability of a type of LED tube was evaluated implementing the approach proposed in this article. The failure criterion was defined as the 70% decrease of the emitted optical power compared with the initial level.The results show that the failure time of a LED tube under operating conditions is about 31 571 h.This designed procedure can evaluate the reliability of LED lamps quickly and effectively. It not only can save the experiment time,but also provide the foundation for evaluating reliability and managing product quality.
【Fund】: 广东省科技厅产学研合作项目(2012B091100175);; 江西省教育厅科学技术研究项目(12717)资助
【CateGory Index】: TM923.34
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