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Select line driver for a display matrix with toggling backplane

  • US 5,949,398 A
  • Filed: 04/12/1996
  • Issued: 09/07/1999
  • Est. Priority Date: 04/12/1996
  • Status: Expired due to Term
First Claim
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1. A display apparatus for applying brightness signals to pixels arranged in a plurality of rows and in a plurality of columns of an array, comprising:

  • a plurality of column drivers for developing said brightness signals at pixel electrodes of pixels of a given row when said given row is selected;

    a source of a toggling, first signal developed in common electrodes of said pixels having, alternately, first and second levels with respect to a predetermined level of a given brightness signal;

    a plurality of stages forming a row select scanner, a given one of said stages that is associated with said given row, including;

    a first transistor for generating a row line select signal in a corresponding row line to select said given row, during a given row select interval; and

    a second transistor coupled to said row line for developing a voltage in a capacitance associated with said row line, in accordance with said first signal, said capacitance capacitively coupling said first signal to said row line to develop a toggling row line de-select signal at said row line that is level shifted with respect to said first signal in accordance with said capacitance voltage, during a row de-select interval.

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