Title :
Analysis on optical properties for various types of light emitting diode
Author :
Chin-Peng Ching ; Zhi-Yin Lee ; Sze-Yen Lee ; Devarajan, Mutharasu
Author_Institution :
Nano Optoelectron. Res. (NOR) Lab., Univ. Sains Malaysia, Minden, Malaysia
Abstract :
In this paper, comparison on wall-plug efficiency for the infrared (IR) emitter, warm-white LED and multi-chips LED has been studied. The main objective of this work is to provide a specific reference on wall-plug efficiency between various types of LED. Optical measurement is carried out at constant current of 1.0A under ambient temperature of 26.0 ± 1.0oC. It is found that IR emitter offers the highest wall-plug efficiency (34.5%) compared to warm-white LED (18.4%) and multi-chips LED (29.3%). In addition, influence of forward current on optical power for all the LEDs has also been discussed. As a result, optical power increases with increasing of forward current.
Keywords :
light emitting diodes; current 1.0 A; forward current; infrared emitter; light emitting diodes; multichips LED; optical power; optical properties; temperature 26.0 degC; wall plug efficiency; warm white LED; Electronic packaging thermal management; Light emitting diodes; Optical films; Optical variables control; Radiometry; Stimulated emission; Temperature; IR emitter; Wall-plug efficiency; forward current; input power; multi-chips LED; optical power; warm-white LED;
Conference_Titel :
Semiconductor Electronics (ICSE), 2012 10th IEEE International Conference on
Conference_Location :
Kuala Lumpur
Print_ISBN :
978-1-4673-2395-6
Electronic_ISBN :
978-1-4673-2394-9
DOI :
10.1109/SMElec.2012.6417168
