Method for driving plasma display panel and plasma display device

A plasma display apparatus comprising:

• a plasma display panel that has a plurality of discharge cells each of which includes a display electrode pair formed of a scan electrode and a sustain electrode, has a plurality of subfields having an initializing period, an address period, and a sustain period in one field, has a subfield having a specific-cell initializing period, and performs gradation display;
• a sustain electrode driver circuit for driving the sustain electrodes;
• and
• a scan electrode driver circuit that generates one of a forced initializing waveform and a selective initializing waveform and applies the one to the scan electrodes in the initializing period, and applies the forced initializing waveform to a specific scan electrode in the specific-cell initializing period, the forced initializing waveform causing initializing discharge in the discharge cells, the selective initializing waveform causing initializing discharge in a discharge cell that has undergone sustain discharge in the sustain period of an immediately preceding subfield,
• wherein a pre-reset period is disposed after the sustain period in a subfield immediately before a subfield having the specific-cell initializing period,
• wherein the scan electrode driver circuit applies a first ramp voltage to the scan electrodes in the pre-reset period, and then applies a second ramp voltage to a scan electrode to which the forced initializing waveform is applied in the specific-cell initializing period immediately after the pre-reset period, the first ramp voltage causing first auxiliary discharge in a discharge cell that has undergone sustain discharge in the sustain period immediately before the pre-reset period, and
• wherein the sustain electrode driver circuit applies a positive-polarity voltage to the sustain electrodes while the scan electrode driver circuit applies the second ramp voltage to the scan electrodes.