Flicker-free liquid crystal display driver system

  • US 5,041,823 A
  • Filed: 12/29/1988
  • Issued: 08/20/1991
  • Est. Priority Date: 12/29/1988
  • Status: Expired due to Term
First Claim
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1. A flicker-free liquid crystal display (LCD) system comprising:

  • a first plurality of lines of LCD pixels;

    a second plurality of lines of LCD pixels, wherein said first and second pluralities of lines are interlaced in an alternating fashion to compose a display, such that each line of said first plurality of lines, is adjacent to at least one line of said second plurality of lines;

    a first set of drivers connected to said first plurality of lines;

    a second set of drivers connected to said second plurality of lines;

    switching means, connected to said first and second sets of drivers, for providing a first voltage to said first set of drivers and a second voltage to said second set of drivers, wherein the first and second voltages have opposite polarities, with respect to each other, and the polarities are interchanged by said switching means at each frame change of display data;

    interface means, connected to said first and second sets of drivers, for controlling said first and second sets of drivers;

    a latching device connected to said interface means;

    a shift register connected to said latching device; and

    wherein;

    the display data and timing signals enter said shift register;

    said shift register passes on a portion of display data to said latching device for retention for a certain period of time; and

    said interface means receives display data from said shift register via said latching device and provides signals to said first and second sets of drivers.

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