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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
  • 申请号: US97765
    申请日: 1998-06-16
  • 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
Apparatus and method for controlling contrast in a dot-matrix liquid
crystal display
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.
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