Contrast ratio promotion method

A contrast ration promotion method for the display device is provided. The display device includes the back light module and has a maximum luminance. The display device has several pixels, and each pixel contains at least three sub-pixels able to emit different color lights. The contrast ratio promo...

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Bibliographic Details
Main Authors TSAI, SUNG-YU, CHEN, LU-HAO, CHIEN, CHANGN, HUANG, WENNG
Format Patent
LanguageChinese
English
Published 01.09.2009
Subjects
ADVERTISING
ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION
CRYPTOGRAPHY
DISPLAY
EDUCATION
PHYSICS
SEALS
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Summary:A contrast ration promotion method for the display device is provided. The display device includes the back light module and has a maximum luminance. The display device has several pixels, and each pixel contains at least three sub-pixels able to emit different color lights. The contrast ratio promotion method includes the steps of continuously receiving picture signals, calculating the ratio of the luminance of each picture corresponding to the picture signal to the maximum luminance as an instant luminance ratio, setting the first ratio, first buffer period, second ratio, second buffer period, gradually adjusting the brightness of the back light module to minimum brightness during the first buffer period, when the instant luminance ratio is smaller than the first ratio, and gradually adjusting the brightness of the back light module to maximum brightness during the second buffer period, when the instant luminance ratio is larger than the second ratio.
Bibliography:Application Number: TW200897105820