Title :
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
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;
Journal_Title :
Very Large Scale Integration (VLSI) Systems, IEEE Transactions on
DOI :
10.1109/TVLSI.2004.831472
