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 [1]. 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.
| Original language | English |
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| Title of host publication | 2009 3rd International Conference on Power Electronics Systems and Applications, PESA 2009 |
| Publication status | Published - 4 Nov 2009 |
| Event | 2009 3rd International Conference on Power Electronics Systems and Applications, PESA 2009 - Hong Kong, Hong Kong Duration: 20 May 2009 → 22 May 2009 |
Conference
| Conference | 2009 3rd International Conference on Power Electronics Systems and Applications, PESA 2009 |
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| Country/Territory | Hong Kong |
| City | Hong Kong |
| Period | 20/05/09 → 22/05/09 |
Keywords
- Constant current power
- LED
- Luminous efficiency
- Thermal design
- Vehicle lighting
ASJC Scopus subject areas
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering