Energy efficient LED driving system for large-scale Video display panel

X. Lv, Ka Hong Loo, Y. M. Lai, Chi Kong Tse

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)


This paper shows how an energy efficient LED driving system can be implemented on a full-color large-scale Video display panel through a low-cost modification of conventional hardware configuration. The proposed system employs multiple LED driver modules connected in parallel that are combined to deliver multi-level PWM current to individual LED pixels. The implementation of the proposed driver is illustrated with a three-level driving scheme. The criteria for selecting current levels in order to maximize the luminous efficacy gain is derived mathematically. The algorithm for video signal conversion that requires for deriving sub-video signals from the original HDMI or DVI signal to activate multiple LED driver modules is also discussed. Experimental results show an average gain of 15% on luminous efficacy over the ON-OFF PWM driving scheme by the proposed method.
Original languageEnglish
Title of host publicationProceedings, IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society
Number of pages6
Publication statusPublished - 1 Dec 2013
Event39th Annual Conference of the IEEE Industrial Electronics Society, IECON 2013 - Vienna, Austria
Duration: 10 Nov 201314 Nov 2013


Conference39th Annual Conference of the IEEE Industrial Electronics Society, IECON 2013

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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