Method and a circuit for gradationally driving a flat display device

A method of driving a PDP matrix display panel, formed of a plurality of pixels each having a charge accumulated therein, 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, for addressing a pixel by
• applying a sustain pulse concurrently to all the pixels,
• applying a write pulse concurrently to all the pixels, and
• applying an erase pulse sequentially to each selected one of the pixels, and
• said display period for lighting said addressed pixels by a concurrent application of sustain pulses to all the pixels, each subframe being allocated with a predetermined number of said sustain pulses, 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.

A method of driving a PDP matrix display panel, formed of a plurality of pixels each having a charge accumulated therein, 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 for addressing a pixel by selectively applying a write pulse to each selected one of the pixels, said write pulse forming a memory medium in a selected one of all the pixels, and
• said display 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, said allocated number being different for each subframe 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.

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 being capable of storing display data by having a charge remaining therein, 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 said charge in a selected one of the pixels on each sequentially selected one of all the scan electrodes;
• said display period, subsequent to said address 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, 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 .