LEDs´ operation optimizing for long term lumen maintenance

Author

Mashkov, Petko ; Pencheva, Tamara ; Gyoch, Berkant

Author_Institution

Phys. Dept., Univ. of Rousse, Rousse, Bulgaria

fYear

2010

fDate

12-16 May 2010

Firstpage

232

Lastpage

237

Abstract

Investigations deals with optimization of operating regimes of LEDs in lighting equipment for obtaining two purposes - maximum light output in dependence of ambient conditions and long term lumen maintenance. Thermal management calculations and heat sink choice are experimentally tested at various ambient conditions (air temperatures from 20^oC to 55^oC) and different current values through LEDs - up to 700 mA. Infrared thermography is used for evaluation of temperature distribution on LEDs and heat sink. Thermal management investigations allow determining safety operating conditions for LEDs at maximum light output in dependence of ambient conditions.

Keywords

LED lamps; heat sinks; infrared imaging; lighting; temperature distribution; thermal management (packaging); LED operation optimization; heat sink; infrared thermography; lighting equipment; long term lumen maintenance; temperature distribution evaluation; thermal management calculation; Heat sinks; Junctions; Light emitting diodes; Resistance heating; Temperature dependence; Temperature measurement; Thermal resistance;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics Technology (ISSE), 2010 33rd International Spring Seminar on

Conference_Location

Warsaw

Print_ISBN

978-1-4244-7849-1

Electronic_ISBN

978-1-4244-7850-7

Type

conf

DOI

10.1109/ISSE.2010.5547298

Filename

5547298