Patent ID: 7760160

Claim:
A driving method of a plasma display apparatus, comprising: applying a ramp-down waveform to a plurality of scan electrodes, the ramp-down waveform decreasing to a first voltage; dividing the plurality of scan electrodes into a plurality of scan electrode groups; applying a ramp-up waveform to the scan electrodes, the ramp-up waveform increasing from the first voltage to a second voltage at a prescribed gradient; and applying a scan pulse to the scan electrodes, the scan pulse decreasing from the second voltage to a third voltage, wherein a time duration of the ramp-up waveform applied to a first one of the scan electrode groups is different from a time duration of the ramp-up waveform applied to a second one of the scan electrode groups, and wherein a prescribed gradient of the ramp-up waveform is less than a gradient of a sustain pulse applied to one of the plurality of scan electrodes in a sustain period.