Patent ID: 8665181

Claim:
A method for driving an AC type plasma display panel having a three-electrode structure in which one frame is divided into plural subfields, each of the plural subfields is divided into a reset period, an address period, and a sustain period, and all periods of the last subfield end within a time of one frame, the method for driving the AC type plasma display panel comprising: allowing a comparator of a scan electrode driving circuit to compare a reference voltage with an output voltage in a ramp-down discharge period of a scan electrode; allowing the comparator to simultaneously output a control signal to both the scan electrode driving circuit and to a logic control circuit when the output voltage arrives at the reference voltage; allowing the scan electrode driving circuit to apply a predetermined voltage Vyl to all cells in response to the control signal; and allowing the logic control circuit to differently set an output time point of the control signal in response to the control signal, to maintain an elapse time period to be uniform even when a ramp-down slope is different between a time point when the predetermined voltage Vyl is applied to all cells and a time point when the address period starts to be uniform even when a first scan pulse is applied.