Delta-Color Adjustment (DCA) for Spatial Modulated Color Backlight Algorithm on High Dynamic Range LCD TVs

Author

Wang, Guo-Zhen ; Lin, Fang-Cheng ; Huang, Yi-Pai

Author_Institution

Display Inst., Nat. Chiao Tung Univ., Hsinchu, Taiwan

Volume

6

Issue

6

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

215

Lastpage

220

Abstract

A high-dynamic-range liquid crystal display (HDR-LCD) which studies as a dual-panel display can much enhance the contrast ratio of image and reduce the power consumption upon the locally controlled dynamic backlight. A simple modulated algorithm, Delta-Color Adjustment (DCA) method, was proposed to determine the RGB-LEDs backlight modulation for high image quality. By implementing the DCA method on a 37Â¿ HDR-LCD TV with 8 Ã— 8 backlight zones, the contrast ratio of a high contrast image can reach ~ 40000:1 with clear image detail and 40% power reduction. Furthermore, by controlling the R, G, and B LEDs individually , the color gamut can be enlarged to 125% NTSC.

Keywords

image colour analysis; liquid crystal displays; spatial light modulators; HDR-LCD TV; RGB-LED backlight modulation; color gamut; delta-color adjustment; dual-panel display; high-dynamic-range liquid crystal display; image contrast ratio; image quality; power consumption; spatial modulated color backlight algorithm; Color; Delta modulation; Dynamic range; Energy consumption; Heuristic algorithms; Image quality; Liquid crystal displays; Liquid crystals; Optimization methods; Signal processing; Color backlight; contrast ratio (CR); dual-panel; high dynamic range (HDR); power consumption;

fLanguage

English

Journal_Title

Display Technology, Journal of

Publisher

ieee

ISSN

1551-319X

Type

jour

DOI

10.1109/JDT.2009.2037164

Filename

5447575