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Method and a circuit for gradationally driving a flat display device

  • US 5,541,618 A
  • Filed: 03/16/1995
  • Issued: 07/30/1996
  • Est. Priority Date: 11/28/1990
  • Status: Expired due to Term
First Claim
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1. A method of driving a PDP matrix display panel having a plurality of pixels located at cross-points of scan electrodes and data electrodes, each of said pixels having a memory function, said method comprising the steps of:

  • dividing a period of a frame displaying a single picture into a plurality of subframes, each subframe having a concurrent addressing period and a concurrent display period for all scan electrodes,said addressing period concurrent to all of said scan electrodes of said single picture, for addressing a pixel by selectively forming a memory medium according to said memory function in a selected one of the pixels on each sequentially selected one of all the scan electrodes;

    said display period, subsequent to said addressing period, for lighting said addressed pixel by a concurrent application of sustain pulses to all the pixels, each subframe being allocated with a predetermined number of said sustain pulses, and each subframe including a different one of said allocated numbers so as to weight a gradation to said respective subframe,wherein a gradation of visual brightness of said lit pixel is determined by selectively operating said subframe for each of said pixels for each frame.

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