发明名称 |
Backlight Control Circuit and Method Thereof |
摘要 |
A backlight control circuit and method thereof are provided to control the backlight of a backlight module so as to enhance the dynamic contrast ratio and save power. The backlight control circuit includes an average luminance detection circuit, a luminance distribution detection unit, a pulse width control circuit and a pulse width modulator. The average luminance detection circuit detects the average luminance of a frame which includes a plurality of pixels; the luminance distribution detection unit detects the pixel luminance distribution of the frame; the pulse width control circuit generates a pulse width control signal according to the average luminance and the pixel luminance distribution of the frame; and the pulse width modulator generates a pulse width modulation (PWM) signal according to the pulse width control signal, so as to control the backlight of the backlight module. |
申请公布号 |
US2012019167(A1) |
申请公布日期 |
2012.01.26 |
申请号 |
US201113073100 |
申请日期 |
2011.03.28 |
申请人 |
CHEN JIAN-KAO;HSU CHIH CHIANG;MSTAR SEMICONDUCTOR, INC. |
发明人 |
CHEN JIAN-KAO;HSU CHIH CHIANG |
分类号 |
H05B37/02 |
主分类号 |
H05B37/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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