Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/31492
Title: Color control system for RGB LED light sources using junction temperature measurement
Authors: Qu, X
Wong, SC 
Tse, CK 
Keywords: Color control
LED lighting
RGB LED
Temperature compensation
Issue Date: 2007
Source: IECON Proceedings (Industrial Electronics Conference), 2007, 4459976, p. 1363-1368 How to cite?
Abstract: The efficiency of LED lights is approaching that of fluorescent lamps. LED light sources are finding more applications than conventional light bulbs due to their compactness, lower heat dissipation, and most importantly, real-time color changing capability. Accurate control of colors for RGB LED lights is a challenging task, which includes optical color mixing, color light intensity control and color point maintenance due to LED junction temperature change and device aging. In this paper , we present a LED junction temperature measurement technique for a pulse width modulation (PWM) diode forward current controlled RGB LED lighting system. The technique can control the color effectively without the need for using expensive feedback systems involving light sensors. Performance of chromaticity and luminance stability for a temperature compensated RGB LED system will be presented.
Description: 33rd Annual Conference of the IEEE Industrial Electronics Society, IECON, Taipei, 5-8 November 2007
URI: http://hdl.handle.net/10397/31492
ISBN: 1424407834
9781424407835
DOI: 10.1109/IECON.2007.4459976
Appears in Collections:Conference Paper

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