Title :
Methods of extrapolation of the LED life time and their comparison based on some LED degradation curves
Author :
Wagner, Max ; Tran Quoc Khanh
Author_Institution :
Lab. of Lighting Technol., Tech. Univ. Darmstadt, Darmstadt, Germany
Abstract :
The degradation of luminous flux of LEDs is dependent on the type of LED and its operation conditions. That is why a prediction of lifetime often differs from case to case. Mostly, the testing times are too short to reach 70 or 80% of the beginning luminous flux. So extrapolation has to be used to predict the lifetime. In this study different methods and mathematical functions are compared.
Keywords :
light emitting diodes; remaining life assessment; LED degradation curves; LED life time extrapolation; lifetime prediction; luminous flux; mathematical functions; Acceleration; Aging; Degradation; Extrapolation; Light emitting diodes; Mathematical model; Temperature measurement;
Conference_Titel :
Solid State Lighting (SSLCHINA), 2014 11th China International Forum on
Print_ISBN :
978-1-4799-6696-7
DOI :
10.1109/SSLCHINA.2014.7127242
