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1. 发明授权

US5640174A Method of driving an active matrix liquid crystal display panel with asymmetric signals 失效
标题翻译：驱动具有不对称信号的有源矩阵液晶显示面板的方法
公开(公告)号：US5640174A
公开(公告)日：1997-06-17
申请号：US574573
申请日：1995-12-14
申请人： Tatsuo Kamei , Kenichi Iwamoto , Yoshio Owaki , Jun-ichi Ohwada
发明人： Tatsuo Kamei , Kenichi Iwamoto , Yoshio Owaki , Jun-ichi Ohwada
IPC分类号： G09G3/20 , G09G3/36
CPC分类号： G09G3/2011 , G09G3/3648 , G09G3/3696 , G09G2320/0204 , G09G3/3614
摘要： A method for driving a liquid crystal display device including a TFT liquid crystal display panel. The TFT liquid crystal display panel includes a plurality of pixel electrodes, a common electrode opposing the pixel electrodes, and a liquid crystal layer disposed between the pixel electrodes and the common electrode. The method includes the steps of generating a plurality of positive gradation voltages with a first voltage dividing resistor circuit, the first voltage dividing resistor circuit being a single series circuit formed by a plurality of resistors connected in series, each of the positive gradation voltages being higher than a midpoint voltage Vasc, generating a plurality of negative gradation voltages with a second voltage dividing resistor circuit, the second voltage dividing resistor circuit being a single series circuit formed by a plurality of resistors connected in series, each of the negative gradation voltages being lower than the midpoint voltage Vasc and being paired with a respective one of the positive gradation voltages, thereby providing a plurality of paired positive and negative gradation voltages, and applying the positive gradation voltages and the negative gradation voltages to the pixel electrodes in accordance with a display signal representing information to be displayed on the TFT liquid crystal display panel. Respective averages of the paired positive and negative gradation voltages are positive, and increase with respect to a reference voltage VC as respective differences between the paired positive and negative gradation voltages decrease, the reference voltage VC being lower than the midpoint voltage Vasc.
摘要翻译：一种用于驱动包括TFT液晶显示面板的液晶显示装置的方法。 TFT液晶显示面板包括多个像素电极，与像素电极相对的公共电极以及设置在像素电极和公共电极之间的液晶层。该方法包括以下步骤：利用第一分压电阻电路产生多个正的灰度级电压，所述第一分压电阻器电路是由串联连接的多个电阻器形成的单个串联电路，每个正的灰度级电压较高比中点电压Vasc，利用第二分压电阻电路产生多个负灰度电压，第二分压电阻电路是由串联连接的多个电阻器形成的单个串联电路，每个负灰度电压较低并且与正的灰度等级电压中的相应一个配对，从而提供多个成对的正和负灰度电压，并且根据显示器向像素电极施加正灰度级电压和负灰度电压代表信息的信号在TFT液晶显示面板上。成对的正和负灰度级电压的相应平均值为正，并且相对于参考电压VC增加，因为成对的正和负灰度电压之间的差异减小，参考电压VC低于中点电压Vasc。

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