Title :
LEDs´ operation optimizing for long term lumen maintenance
Author :
Mashkov, Petko ; Pencheva, Tamara ; Gyoch, Berkant
Author_Institution :
Phys. Dept., Univ. of Rousse, Rousse, Bulgaria
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 20oC to 55oC) 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;
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
DOI :
10.1109/ISSE.2010.5547298
