发明授权
- 专利标题: Power source for dot matrix LCD
- 专利标题(中): DOT MATRIX液晶显示器的电源
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申请号: US692182申请日: 1991-04-26
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公开(公告)号: US5220315A公开(公告)日: 1993-06-15
- 发明人: Jean-Frederic Clerc
- 申请人: Jean-Frederic Clerc
- 申请人地址: JPX Tokyo
- 专利权人: Stanley Electric Co., Ltd.
- 当前专利权人: Stanley Electric Co., Ltd.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX2-115600 19900501
- 主分类号: G02F1/133
- IPC分类号: G02F1/133 ; G09G3/20 ; G09G3/36
摘要:
A dot matrix liquid crystal display having segment electrodes and common electrodes, a segment driver circuit and a common driver circuit, a multi-level power source, sensor resistors connected in series to the supply voltage bus lines for the segment electrodes, amplifiers for detecting and ampifying the voltage drop in the sensor resistors, and capacitors for capacitively coupling the common electrodes and the amplifiers. When the segment voltage is changed, the voltage change is sensed through the sensor resister and is fed back to the common electrode to reduce the induced noise on the common electrode.
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