Title :
An experimental study on the photometrical impacts of several current waveforms on power white LEDs
Author :
Almeida, Pedro S. ; Nogueira, Fernando J. ; Guedes, Luiz F A ; Braga, Henrique A C
Author_Institution :
NIMO - Modern Lighting Res. Group, Fed. Univ. of Juiz de Fora (UFJF), Belo Horizonte, Brazil
Abstract :
Since light-emitting diodes (LEDs) are a rising lighting technology, a great amount of research is currently being focused on driving techniques for these current-fed semiconductor devices. For realizing efficient current drivers, power electronics is usually employed. This work focuses on studying the impacts that several high and low frequency current waveforms commonly found on power electronic drivers may have on the photometrical and colorimetrical performance of the LEDs themselves. Empirical evidence obtained under controlled experiments is provided to correlate important features of the LEDs to the current levels and waveforms.
Keywords :
driver circuits; light emitting diodes; photometric light sources; power semiconductor devices; waveform analysis; colorimetrical performance; current drivers; current-fed semiconductor devices; light-emitting diodes; lighting technology; low frequency current waveforms; photometrical impacts; power electronics; power white LED; Color; Light emitting diodes; Lighting; Power distribution; Power electronics; Pulse width modulation; Temperature; Colorimetry; Current Waveform; Light-Emitting Diode Drivers; Photometry; Power White LEDs; Solid-State Lighting;
Conference_Titel :
Power Electronics Conference (COBEP), 2011 Brazilian
Conference_Location :
Praiamar
Print_ISBN :
978-1-4577-1644-7
Electronic_ISBN :
2175-8603
DOI :
10.1109/COBEP.2011.6085242