作者：徐欢1, 刘桂雄1, 余荣斌1,2
作者单位：1. 华南理工大学机械与汽车工程学院, 广东 广州 510640;
2. 广东产品质量监督检验研究院, 广东 广州 510330
关键词：LED;可靠性;β分布;加速方程
摘要：
针对LED可靠性评估的方法大部分均基于样品伪寿命这一现象，提出基于退化量分布的LED可靠性评估方法。先依据指数模型预测后续时刻的退化量，再通过分布统示法求出各时刻的累积失效概率，然后根据加速模型确定常应力下LED的可靠度函数。以国内某型LED灯具为实验对象，求出该型灯具寿命估计值为77 100 h，验证方法的实用性、有效性。
Reliability evaluation of LED based on degradation data distribution
XU Huan1, LIU Guixiong1, YU Rongbin1,2
1. School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China;
2. Guangdong Testing Institute of Product Quality Supervision, Guangzhou 510330, China
Abstract: Most methods for the LED reliability evaluation are based on the pseudo life of product, and this paper proposes a LED reliability evaluation method based on degradation amount distribution. The method was used to predict the degradation amount of follow-up time according to index model and calculate the cumulative failure probability in every moment by β-distribution uniform expression method, and then, LED reliability function under constant stress was confirmed based on accelerated model. Finally, Based on the test for a certain type of LED lamp in China, its service life was estimated as 77 100 h, which verified the feasibilityand effectiveness of the method.
Keywords: LED;reliability;β-distribution;accelerated equation
2016, 42(9): 126-129 收稿日期: 2015-10-18;收到修改稿日期: 2015-12-10
基金项目: 广东省质量技术监督局科技项目（2012ZZ05）
作者简介: 徐欢(1990-),男,湖北荆州市人,硕士研究生,专业方向为寿命预估理论与应用研究。
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