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Single wire interface for LCD calibrator

  • US 7,050,027 B1
  • Filed: 01/16/2004
  • Issued: 05/23/2006
  • Est. Priority Date: 01/16/2004
  • Status: Expired due to Fees
First Claim
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1. A calibration circuit for adjusting a common electrode voltage Vcom for a liquid crystal display (LCD), comprising a controller to receive a first command for changing said common electrode voltage Vcom by way of a single-wire interface, and to cause said common electrode voltage Vcom to change in response to said first command, the controller having a counter to generate a count related to said common electrode voltage Vcom, and a digital-to-analog converter (DAC) to generate an intermediate voltage related to said count.

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