An Optimized Backlight Local Dimming Algorithm for Edge-Lit LED Backlight LCDs

Seungwook Cha, Taehyeon Choi, Hoonjae Lee, Sanghoon Sull

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

This paper presents an efficient optimized backlight local dimming method that minimizes power consumption under a given allowable distortion for liquid crystal displays with edge-lit light-emitting diode backlight. To reduce image quality fluctuation, an inequality constraint optimization problem is formulated using a given allowable distortion and the steepest descent method is used to solve the optimization problem. The experimental results show that the proposed method has better performance than previous methods at the same average power consumption in the unnoticeable level of the difference between the displayed images before and after dimming. Also, the proposed method reduces the risk of large performance degradation and reduces computation time by three times compared with the existing optimization based methods.

Original languageEnglish
Article number7036042
Pages (from-to)378-385
Number of pages8
JournalIEEE/OSA Journal of Display Technology
Volume11
Issue number4
DOIs
Publication statusPublished - 2015 Apr 1

Fingerprint

dimming
Liquid crystal displays
Light emitting diodes
light emitting diodes
optimization
Electric power utilization
steepest descent method
Steepest descent method
Image quality
liquid crystals
degradation
Degradation

Keywords

  • light spread function (LSF)
  • Light-emitting diode (LED) backlight
  • liquid crystal display (LCD)
  • local dimming
  • optimization

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

An Optimized Backlight Local Dimming Algorithm for Edge-Lit LED Backlight LCDs. / Cha, Seungwook; Choi, Taehyeon; Lee, Hoonjae; Sull, Sanghoon.

In: IEEE/OSA Journal of Display Technology, Vol. 11, No. 4, 7036042, 01.04.2015, p. 378-385.

Research output: Contribution to journalArticle

Cha, Seungwook ; Choi, Taehyeon ; Lee, Hoonjae ; Sull, Sanghoon. / An Optimized Backlight Local Dimming Algorithm for Edge-Lit LED Backlight LCDs. In: IEEE/OSA Journal of Display Technology. 2015 ; Vol. 11, No. 4. pp. 378-385.
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