发明授权
US6057820A Apparatus and method for controlling contrast in a dot-matrix liquid
crystal display
失效
用于控制点阵液晶显示器中的对比度的装置和方法
- 专利标题: Apparatus and method for controlling contrast in a dot-matrix liquid crystal display
- 专利标题(中): 用于控制点阵液晶显示器中的对比度的装置和方法
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申请号: US97765申请日: 1998-06-16
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公开(公告)号: US6057820A公开(公告)日: 2000-05-02
- 发明人: Dean S. Irwin
- 申请人: Dean S. Irwin
- 申请人地址: CA Novato
- 专利权人: Spatialight, Inc.
- 当前专利权人: Spatialight, Inc.
- 当前专利权人地址: CA Novato
- 主分类号: G09G3/36
- IPC分类号: G09G3/36
摘要:
An apparatus and method for controlling the contrast in a dot-matrix liquid crystal display (LCD) is provided wherein the voltages applied to the electrodes is phase shifted. The phase shifted electrode voltages avoids the problem that rows of the dot-matrix LCD may have long periods when the voltage on the front electrode and the back electrode are different polarities so that the contrast of the dot-matrix LCD across the rows is improved.
公开/授权文献
- USD420141S Drug test card 公开/授权日:2000-02-01
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