Optimal local dimming for LED-backlit LCD displays via linear programming

Xiao Shu, Xiaolin Wu, Søren Forchhammer

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

LED-backlit LCD displays hold the promise of improving the image quality while reducing the energy consumption with signal-dependent local dimming. To fully realize such potentials we propose a novel local dimming technique that jointly optimizes the intensities of LED backlights and the attenuations of LCD pixels. The objective is to minimize the distortion in luminance reproduction due to the leakage of LCD and the coarse granularity of the LED lights. The optimization problem is formulated as one of linear programming, and both exact and approximate algorithms are proposed. Simulation results demonstrate superior performances of the proposed algorithms over the existing local dimming algorithms.
Original languageEnglish
JournalProceedings of SPIE, the International Society for Optical Engineering
Volume8305
Pages (from-to)83050K
Number of pages7
ISSN0277-786X
DOIs
Publication statusPublished - 2012
EventIS&T/SPIE Electronic Imaging : Visual Information Processing and Communication III - Hyatt Regency San Francisco Airport , Burlingame, California, United States
Duration: 22 Jan 201226 Jan 2012

Conference

ConferenceIS&T/SPIE Electronic Imaging : Visual Information Processing and Communication III
LocationHyatt Regency San Francisco Airport
CountryUnited States
CityBurlingame, California
Period22/01/201226/01/2012

Keywords

  • Liquid crystal display
  • LED backlighting
  • Image reproduction
  • Image contrast
  • Optimization

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