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Data line drivers with column initialization transistor

  • US 5,686,935 A
  • Filed: 03/06/1995
  • Issued: 11/11/1997
  • Est. Priority Date: 03/06/1995
  • Status: Expired due to Fees
First Claim
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1. A data line driver for applying a video signal to a column electrode of a display device, comprising:

  • a source of said video signal;

    a source of a data ramp signal;

    a first transistor having a first main current conducting terminal coupled to said source of said data ramp signal and a second main current conducting terminal coupled to said column electrode and responsive to said video signal for applying said data ramp signal to said column electrode during a controllable portion of a period of said data ramp signal that varies in accordance with said video signal to develop a column electrode signal at said column electrode; and

    a second transistor responsive to an initialization control signal and coupled to said column electrode for initializing said column electrode signal via a signal path that bypasses said first transistor.

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