Plasma display panel driving method and plasma display device

A plasma display panel driving method for displaying an image by dividing one filed of a supplied display image into a plurality of sub-fields, in which the plasma display panel includes discharge cells, each of the discharge cells includes display electrode pairs, each of the display electrode pairs is made of a scan electrode and a sustain electrode, each of the sub-fields has a setup period for generating initializing discharge in the discharge cells, an address period for generating addressing discharge in the discharge cells, and a sustain period for applying sustain pulses set for each of the sub-fields to the display electrode pairs and generating sustaining discharge, the plasma display panel driving method comprising:

• when the display image changes from a normal image to a predetermined image meeting a predetermined condition, reducing the number of the sub-fields in the one field period, and increasing the total number of the sustain pulses in the one field period;
• and
• when the display image changes from the predetermined image to the normal image, reducing the total number of the sustain pulses in the one field period, and increasing the number of the sub-fields in the one field period,
• wherein the predetermined image has a light-emitting rate smaller than a light-emitting rate threshold in predetermined ones of the sub-fields, a light-emitting rate larger than 0% in at least one of the sub-fields having a largest brightness weight, and is a still image.