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

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-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 languageEnglish
Title of host publicationProceedings, IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society
Pages2186-2191
Number of pages6
DOIs
Publication statusPublished - 1 Dec 2012
Event38th Annual Conference on IEEE Industrial Electronics Society, IECON 2012 - Montreal, QC, Canada
Duration: 25 Oct 201228 Oct 2012

Conference

Conference38th Annual Conference on IEEE Industrial Electronics Society, IECON 2012
CountryCanada
CityMontreal, QC
Period25/10/1228/10/12

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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