发明授权
- 专利标题： Liquid crystal driving circuit and method with correction coefficients based on current and previous frame gradation ranges
- 专利标题（中）： 液晶驱动电路和基于当前和先前帧灰度范围的校正系数的方法
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申请号： US12309489申请日： 2007-06-06
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公开(公告)号： US08054275B2公开(公告)日： 2011-11-08
- 发明人: Asahi Yamato , Kohji Saitoh , Akizumi Fujioka , Keiichi Yamamoto , Toshihiro Yanagi
- 申请人： Asahi Yamato , Kohji Saitoh , Akizumi Fujioka , Keiichi Yamamoto , Toshihiro Yanagi
- 申请人地址： JP Osaka
- 专利权人： Sharp Kabushiki Kaisha
- 当前专利权人： Sharp Kabushiki Kaisha
- 当前专利权人地址： JP Osaka
- 代理机构： Harness, Dickey & Pierce, P.L.C.
- 优先权： JP2006-247308 20060912
- 国际申请： PCT/JP2007/061416 WO 20070606
- 国际公布： WO2008/032480 WO 20080320
- 主分类号： G09G3/36
- IPC分类号： G09G3/36
摘要：
In one embodiment of the present application, a memory stores a lookup table storing, in accordance with a combination of a value of a video signal of a current frame and a value of a video signal of a previous frame, each of correction values, the correction values in each of which a temporal change of a video signal is enhanced. A correcting circuit carries out, with respect to a correction value selected from the lookup table, a predetermined correcting operation in accordance with a polarity of a voltage to be applied to each of data signal lines S1 through Sm, with the use of a correction coefficient which is set based on properties of liquid crystal. Thus found is a corrected video signal in accordance with a positive or negative polarity. This makes it possible to find, with less memory capacity, an optimum corrected video signal in accordance with a polarity of a voltage to be applied to a data signal line.