Adaptive Color Saturation Control for Low Power RGBW OLED Displays

Ji Hoon Choi, Myongyoung Lee, Kyungjin Kang, Jong Ok Kim

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

As the OLED display size is larger, power consumption is less efficient because more energy is lost as heat in OLED light-emitting devices. Thus, power consumption reduction becomes an important practical issue. For signal-level power reduction, the existing method sacrifices the color saturation of the displayed image. Color is desaturated with a fixed ratio regardless of whether the color is neutral or saturated, and it consequently lowers colorimetric accuracy excessively. In this paper, we straightforwardly extend the existing work by adaptively controlling the extent of color saturation based on the principle of JNCD (Just Noticeable Color Difference). By using JNCD, it is possible to determine the color saturation ratio of a pixel adaptively, and we can reduce power consumption while minimizing perceptual color distortion. Experimental results with the RGBW-type 55 inches OLED TV confirm that the proposed method can efficiently reduce power consumption of OLED displays.

Original languageEnglish
Article number7400920
Pages (from-to)784-790
Number of pages7
JournalJournal of Display Technology
Volume12
Issue number8
DOIs
Publication statusPublished - 2016 Aug

Keywords

  • Color saturation
  • OLED display
  • just noticeable color difference
  • power consumption reduction

ASJC Scopus subject areas

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

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