A backlight dimming algorithm for low power and high image quality LCD applications

Author

Cho, Hyunsuk ; Kwon, Oh-Kyong

Author_Institution

Div. of Electr. & Comput. Eng., Hanyang Univ., Seoul, South Korea

Volume

55

Issue

2

fYear

2009

fDate

5/1/2009 12:00:00 AM

Firstpage

839

Lastpage

844

Abstract

A new backlight dimming algorithm is proposed to reduce power consumption of backlight and improve image quality in LCD applications. The proposed algorithm is consisted of two new techniques: the brightness modulation of the backlight and pixel compensation. The power saving ratio of four typical benchmarking images is 14-43% by using proposed brightness modulation algorithm. The proposed pixel compensation removes the clipping artifact and unnecessary luminance reduction. The proposed backlight dimming algorithm is demonstrated on 7-inch TFTLCD with LED backlight.

Keywords

LED displays; brightness; image resolution; liquid crystal displays; backlight compensation; backlight dimming algorithm; brightness modulation algorithm; high image quality LCD; pixel compensation; Brightness; Consumer products; Data mining; Energy consumption; Histograms; Image quality; Liquid crystal displays; Pixel; Power engineering and energy; Power engineering computing; Backlight dimming, LED backlight, Pixel; compensation, LCD;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/TCE.2009.5174463

Filename

5174463