Power management of direct-view LED backlight for liquid crystal display

Xuan Hao Lee, Che Chu Lin, Yu Yu Chang, He Xiang Chen, Ching Cherng Sun

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

In this paper, we present a study of management of power in function of luminous efficacy of white LED as well as the efficiency enhancement of the direct-view backlight with photon recycling. A cavity efficiency as high as 90.7% is demonstrated for a direct-view backlight with photon recycling. In the future, with a 90% backlight cavity, luminous efficacy of 200 lm/W for white LEDs, and a transmission efficiency of 10% for the liquid crystal panel, the required power of LEDs could be only 16 W. Up to 85% energy saving could be achieved in comparison to the power of the current liquid crystal display.

Original languageEnglish
Pages (from-to)142-144
Number of pages3
JournalOptics and Laser Technology
Volume46
Issue number1
DOIs
StatePublished - Mar 2013

Keywords

  • Backlight
  • LED
  • Photon recycling

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