Title :
Design of an LED thermal system for automotive systems
Author :
Kwok, K.F. ; Divakar, B.P. ; Cheng, K.W.E.
Author_Institution :
Dept. of Electr. Eng., Hong Kong Polytech. Univ., Hong Kong, China
Abstract :
The paper examines the high power Light Emitted diode (LED) and the hear distribution of the heat sink. Beside we also study the relationship between temperature and the current on the LEDs luminous efficiency. The temperature rise to over the limit level that the luminous efficiency will decrease rapidly. The current increase will cause the nonequilibrium electron diffuse out of the potential wall and will increase the temperature, so as to decrease luminous efficiency and the LEDs life. Enhancing the heat manage of LEDs that can improve the luminous efficiency. Thermal design examines by using the thermal analysis. Finally we propose the electrical circuit to drive the LEDs in constant current power to maintain the temperature more constant of LEDs.
Keywords :
LED displays; LED lamps; automotive electronics; heat sinks; thermal analysis; LED thermal system; automotive systems; heat distribution; heat sink; thermal analysis; Automotive engineering; Fluorescent lamps; Heat sinks; LED lamps; Light emitting diodes; Semiconductor diodes; Temperature; Thermal conductivity; Thermal factors; Thermal management; LED; constant current power; luminous efficiency; thermal design; vehicle lighting;
Conference_Titel :
Power Electronics Systems and Applications, 2009. PESA 2009. 3rd International Conference on
Conference_Location :
Hong Kong
Print_ISBN :
978-1-4244-3845-7
