A balancing strategy and implementation of current equalizer for high power LED backlighting

Chang Hua Lin*, Tsung You Hung, Chien Ming Wang, Kai Jun Pai

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

27 Citations (Scopus)

Abstract

This paper presents a current equalizer to balance the driving currents for high power LEDs (light emitting diode). The proposed strategy combined PWM strategy and digital dimming control to achieve the same illumination for each driven diodes. To obtain the same average current, the duty cycle of LEDs is modulated according to its current amplitude instead of traditional current amplitude adjusting. Complete mathematical analysis and design considerations are detailed. The experimental results are close to the theoretical predictions, and the measured tolerance errors are all below 4%.

Original languageEnglish
Title of host publication7th International Conference on Power Electronics and Drive Systems, PEDS 2007
Pages1613-1617
Number of pages5
DOIs
Publication statusPublished - 2007
Event7th International Conference on Power Electronics and Drive Systems, PEDS 2007 - Bangkok, Thailand
Duration: 2007 Nov 272007 Nov 30

Publication series

NameProceedings of the International Conference on Power Electronics and Drive Systems

Conference

Conference7th International Conference on Power Electronics and Drive Systems, PEDS 2007
Country/TerritoryThailand
CityBangkok
Period2007/11/272007/11/30

Keywords

  • Backlighting
  • Balancing strategy
  • Current equalizer
  • High power LED

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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