DLS: dynamic backlight luminance scaling of liquid crystal display

Author

Chang, Naehyuck ; Choi, Inseok ; Shim, Hojun

Author_Institution

Sch. of Comput. Sci. & Eng., Seoul Nat. Univ., South Korea

Volume

12

Issue

8

fYear

2004

Firstpage

837

Lastpage

846

Abstract

Backlight systems dominate the power requirements of battery-operated hand-held devices with color thin-film transistor (TFT), liquid crystal displays (LCDs). We introduce dynamic luminance scaling of the backlight with appropriate image compensation. Dynamic backlight luminance scaling (DLS) keeps the perceived intensity or contrast of the image as close as possible to the original while achieving significant power reduction. DLS compromises quality of image between power consumption, which fulfills a large variety of user preferences in power-aware multimedia applications. DLS saves 20% to 80% of power consumption of the backlight systems while keeping a reasonable amount of image quality degradation.

Keywords

brightness; image colour analysis; image enhancement; liquid crystal displays; power consumption; thin film transistors; backlight systems; battery-operated hand-held devices; dynamic backlight luminance scaling; image compensation; image contrast; image intensity; image quality degradation; liquid crystal display; power consumption; power reduction; power-aware multimedia applications; Brightness; Energy consumption; Energy management; Image processing; Liquid crystal displays; Personal communication networks; Personal digital assistants; Power measurement; Power system management; Thin film transistors;

fLanguage

English

Journal_Title

Very Large Scale Integration (VLSI) Systems, IEEE Transactions on

Publisher

ieee

ISSN

1063-8210

Type

jour

DOI

10.1109/TVLSI.2004.831472

Filename

1316898