Abstract

In recent times, as LEDs are fast becoming the preferred light source to the conventional halogen and fluorescent-based light sources, the question about their useful life also gathering attention. Concerns about their use in safety critical areas such as airfield lighting and various other display applications is still far from addressed thanks to the lack of robust methods to determine their remaining useful life (RUL). Though the past literature extensively deals with the problem of life prediction based on reliability analysis and tracking algorithms, there could still be enough scope to find more suitable methods that can be readily implemented on-board the light fixture. Here, we present a method to predict the RUL for high power white LEDs that can be readily implemented on-board the lighting system based on lumen maintenance data and on-board sensor values.

© 2016 IEEE

Degradation modeling of mid-power white-light LEDs by using Wiener process

Jianlin Huang, Dušan S Golubović, Sau Koh, Daoguo Yang, Xiupeng Li, Xuejun Fan, and G.Q. Zhang
Opt. Express 23(15) A966-A978 (2015)

Heat dissipation performance of a high-brightness LED package assembly using high-thermal conductivity filler

K. C. Yung, H. Liem, and H. S. Choy
Appl. Opt. 52(35) 8484-8493 (2013)

High-output LED-based light engine for profile lighting fixtures with high color uniformity using freeform reflectors

Jesper Gadegaard, Thøger Kari Jensen, Dennis Thykjær Jørgensen, Peter Kjær Kristensen, Thomas Søndergaard, Thomas Garm Pedersen, and Kjeld Pedersen
Appl. Opt. 55(6) 1356-1365 (2016)

Analysis of junction temperature and modification of luminous flux degradation for white LEDs in a thermal accelerated reliability test

Hong-Liang Ke, Lei Jing, Jian Hao, Qun Gao, Yao Wang, Xiao-xun Wang, Qiang Sun, and Zhi-Jun Xu
Appl. Opt. 55(22) 5909-5916 (2016)

Large-area, uniform white light LED source on a flexible substrate

Chin-Wei Sher, Kuo-Ju Chen, Chien-Chung Lin, Hau-Vei Han, Huang-Yu Lin, Zong-Yi Tu, Hsien-Hao Tu, Keiji Honjo, Hsin-Yi Jiang, Sin-Liang Ou, Ray-Hua Horng, Xiuling Li, Chien-Chung Fu, and Hao-Chung Kuo
Opt. Express 23(19) A1167-A1178 (2015)