Erratum to: Determination of cut-off time of accelerated aging test under temperature stress for LED lamps

2017, Volume 18, Issue 10

Abstract

Keywords

Related Research

Frontiers of Information Technology & Electronic Engineering >> 2017, Volume 18, Issue 10 doi: 10.1631/FITEE.1500483

Erratum to: Determination of cut-off time of accelerated aging test under temperature stress for LED lamps

. University of Chinese Academy of Sciences, Beijing 100049, China.. Opto-Electronics Technology Center, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.

Available online: 2017-10-31

HTML33 PDF 0 Collect 0

Next Previous

Abstract

在LED灯具加速老化过程中，为获得最小截止时间，对其寿命进行快速预估，本文采用5阶滑动平均误差方法分析数据。选用同批次的16个样本，分别进行80℃和85℃应力条件下的加速老化。首先，采用e指数对光通维持率进行拟合，获得每个灯具的加速寿命，进而采用威布尔分布对加速寿命进行拟合，获得中位寿命。其次，采用平均滑动误差方法，可获取不同截止时间下中位寿命预估误差。结果表明：加速老化过程中，存在最小截止时间，该时间可通过滑动平均误差和截止时间的关系确定；当截止时间小于该值时，寿命预估不合理；寿命预估误差随截止时间增加而逐渐减小。对于该类LED灯具，80℃时最小截止时间为1104小时，寿命预估误差为1.15%；85℃时最小截止时间为936小时，寿命预估误差为1.24%。当寿命估计误差约为0.46％时，80 ℃和85 ℃对应的中位寿命分别为7310小时和4598小时。

Keywords

LED lamp ; Accelerated aging test ; Medium lifetime ; Moving average error

Related Research