Modeling Power-Constrained Optimal Backlight Dimming for Color Displays

Nino Burini, Ehsan Nadernejad, Jari Korhonen, Søren Forchhammer, Xiaolin Wu

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

In this paper, we present a framework for modeling color liquid crystal displays (LCDs) having local light-emitting diode (LED) backlight with dimming capability. The proposed framework includes critical aspects like leakage, clipping, light diffusion and human perception of luminance and allows adjustable penalization of power consumption. Based on the framework, we have designed a set of optimization-based backlight dimming algorithms providing a perceptual optimal balance of clipping and leakage, if necessary. The novel algorithms are compared with several other schemes known from the literature, using both objective measures and subjective assessment. The results show that the novel algorithms provide better quality at a given energy level or lower energy at a given quality level.
Original languageEnglish
JournalJournal of Display Technology
Volume9
Issue number8
Pages (from-to)656-665
ISSN1551-319X
DOIs
Publication statusPublished - 2013

Keywords

  • Backlight dimming
  • Color image
  • Contrast
  • High dynamic range (HDR)
  • Image quality
  • Light-emitting diode (LED) backlight
  • Light leakage
  • Liquid crystal display (LCD)
  • Optimization
  • Power saving

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