Color control system for RGB LED light sources using junction temperature measurement

Xiaohui Qu; Siu Chung Wong; Chi Kong Tse

doi:10.1109/IECON.2007.4459976

Color control system for RGB LED light sources using junction temperature measurement

Xiaohui Qu, Siu Chung Wong, Chi Kong Tse

The Hong Kong Polytechnic University

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

67 Citations (Scopus)

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.

Original language	English
Title of host publication	Proceedings of the 33rd Annual Conference of the IEEE Industrial Electronics Society, IECON
Pages	1363-1368
Number of pages	6
DOIs	https://doi.org/10.1109/IECON.2007.4459976
Publication status	Published - 1 Dec 2007
Event	33rd Annual Conference of the IEEE Industrial Electronics Society, IECON - Taipei, Taiwan Duration: 5 Nov 2007 → 8 Nov 2007

Conference

Conference	33rd Annual Conference of the IEEE Industrial Electronics Society, IECON
Country/Territory	Taiwan
City	Taipei
Period	5/11/07 → 8/11/07

Keywords

Color control
LED lighting
RGB LED
Temperature compensation

ASJC Scopus subject areas

Control and Systems Engineering
Electrical and Electronic Engineering

More information

10.1109/IECON.2007.4459976

Cite this

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title = "Color control system for RGB LED light sources using junction temperature measurement",

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.",

keywords = "Color control, LED lighting, RGB LED, Temperature compensation",

author = "Xiaohui Qu and Wong, \{Siu Chung\} and Tse, \{Chi Kong\}",

year = "2007",

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doi = "10.1109/IECON.2007.4459976",

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pages = "1363--1368",

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}

Qu, X, Wong, SC & Tse, CK 2007, Color control system for RGB LED light sources using junction temperature measurement. in Proceedings of the 33rd Annual Conference of the IEEE Industrial Electronics Society, IECON., 4459976, pp. 1363-1368, 33rd Annual Conference of the IEEE Industrial Electronics Society, IECON, Taipei, Taiwan, 5/11/07. https://doi.org/10.1109/IECON.2007.4459976

Color control system for RGB LED light sources using junction temperature measurement. / Qu, Xiaohui; Wong, Siu Chung; Tse, Chi Kong.
Proceedings of the 33rd Annual Conference of the IEEE Industrial Electronics Society, IECON. 2007. p. 1363-1368 4459976.

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

TY - GEN

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N2 - 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.

AB - 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.

KW - Color control

KW - LED lighting

KW - RGB LED

KW - Temperature compensation

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BT - Proceedings of the 33rd Annual Conference of the IEEE Industrial Electronics Society, IECON

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Color control system for RGB LED light sources using junction temperature measurement

Abstract

Conference

Keywords

ASJC Scopus subject areas

More information

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