Color control in RGB driver system applicable to LED of all ageing conditions

S. K. Ng; Ka Hong Loo; Y. M. Lai; Chi Kong Tse

doi:10.1109/IECON.2012.6388684

Color control in RGB driver system applicable to LED of all ageing conditions

S. K. Ng, Ka Hong Loo, Y. M. Lai, 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

2 Citations (Scopus)

Abstract

This paper presents a method of controlling the white color point in red/green/blue (RGB) LED driver system. In contrast to conventional systems where the average driving currents of the primary-color LEDs can become saturated when the LEDs have sufficiently aged, and causes the resulting white color point to go out of regulation, the proposed method avoids this problem by adjusting the color set points when a predefined threshold current is reached by one or more of the primary-color LEDs. It is shown that the method can effectively maintain the white color point of the RGB LED at the desired value when the LEDs are subjected to an accelerated ageing through repetitive current stress cycles.

Original language	English
Title of host publication	Proceedings, IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society
Pages	2186-2191
Number of pages	6
DOIs	https://doi.org/10.1109/IECON.2012.6388684
Publication status	Published - 1 Dec 2012
Event	38th Annual Conference on IEEE Industrial Electronics Society, IECON 2012 - Montreal, QC, Canada Duration: 25 Oct 2012 → 28 Oct 2012

Conference

Conference	38th Annual Conference on IEEE Industrial Electronics Society, IECON 2012
Country/Territory	Canada
City	Montreal, QC
Period	25/10/12 → 28/10/12

ASJC Scopus subject areas

Control and Systems Engineering
Electrical and Electronic Engineering

More information

10.1109/IECON.2012.6388684

Cite this

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title = "Color control in RGB driver system applicable to LED of all ageing conditions",

abstract = "This paper presents a method of controlling the white color point in red/green/blue (RGB) LED driver system. In contrast to conventional systems where the average driving currents of the primary-color LEDs can become saturated when the LEDs have sufficiently aged, and causes the resulting white color point to go out of regulation, the proposed method avoids this problem by adjusting the color set points when a predefined threshold current is reached by one or more of the primary-color LEDs. It is shown that the method can effectively maintain the white color point of the RGB LED at the desired value when the LEDs are subjected to an accelerated ageing through repetitive current stress cycles.",

author = "Ng, {S. K.} and Loo, {Ka Hong} and Lai, {Y. M.} and Tse, {Chi Kong}",

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Ng, SK, Loo, KH, Lai, YM & Tse, CK 2012, Color control in RGB driver system applicable to LED of all ageing conditions. in Proceedings, IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society., 6388684, pp. 2186-2191, 38th Annual Conference on IEEE Industrial Electronics Society, IECON 2012, Montreal, QC, Canada, 25/10/12. https://doi.org/10.1109/IECON.2012.6388684

Color control in RGB driver system applicable to LED of all ageing conditions. / Ng, S. K.; Loo, Ka Hong; Lai, Y. M. et al.
Proceedings, IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society. 2012. p. 2186-2191 6388684.

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

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AB - This paper presents a method of controlling the white color point in red/green/blue (RGB) LED driver system. In contrast to conventional systems where the average driving currents of the primary-color LEDs can become saturated when the LEDs have sufficiently aged, and causes the resulting white color point to go out of regulation, the proposed method avoids this problem by adjusting the color set points when a predefined threshold current is reached by one or more of the primary-color LEDs. It is shown that the method can effectively maintain the white color point of the RGB LED at the desired value when the LEDs are subjected to an accelerated ageing through repetitive current stress cycles.

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Color control in RGB driver system applicable to LED of all ageing conditions

Abstract

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ASJC Scopus subject areas

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