Title :
Electrothermal characteristics research of high-power LED in pulse drive mode
Author :
Hongmin Wang ; Haiqing Guo ; Wenlong Yu
Author_Institution :
Opt.&Electron. Eng. Res. Center, Harbin Univ. of Sci. & Technol., Harbin, China
Abstract :
Current study of LED device electrothermal characteristics are basically under the condition of DC drive performance. The electrothermal characteristics of LED in pulse drive mode is not given. So this article in view of the pulse drive mode of high power LED light electrothermal characteristics are studied. This paper measured parameters such as luminous flux, luminous efficiency, substrate temperature of high power LED in the pulsed drive mode and DC drive mode. After getting the result of comparative analysis, it concluded that the electrothermal characteristics of high power LED in the pulsed drive mode. It shows that the flux and luminous efficiency are less ideal than DC pulsed condition. With the loss of the pulsed signal duty cycle, the flux and the luminous efficiency are lower. However, in the pulsed drive mode, the temperature of LED junction is significantly lower than it in DC condition.
Keywords :
light emitting diodes; lighting; photometry; DC drive mode; high power LED lighting system; high-power LED junction device; light electrothermal characteristics; luminous efficiency; luminous flux; pulse drive mode; pulsed signal duty cycle loss; Electric breakdown; Light emitting diodes; Optical devices; Optical pulses; Optical refraction; Performance evaluation; RNA; Electric properties; Luminous efficiency; Luminous flux; Pulse current source; high power LED;
Conference_Titel :
Measurement, Information and Control (ICMIC), 2013 International Conference on
Conference_Location :
Harbin
Print_ISBN :
978-1-4799-1390-9
DOI :
10.1109/MIC.2013.6758114
