Patent ID: 7471264

Claim:
A plasma display panel (PDP) driver comprising: a scan pulse generating section including high- and low-side scan switching devices connected in series, whose node is connected to a scan electrode of a PDP, turning on said high- and low-side scan switching devices alternately at a predetermined timing, and applying a scan voltage pulse to said scan electrode; a sustaining pulse generating section turning on one of said high- and low-side scan switching devices and applying a sustaining voltage pulse to said scan electrode; and a reset pulse generating section turning on said high- and low-side scan switching devices alternately at a predetermined timing and applying to said scan electrode a reset voltage pulse reaching its upper and lower limits in the ON periods of said high- and low-side scan switching devices, respectively, wherein said scan pulse generating section further includes: a constant-voltage source which includes an negative electrode connected to said low side scan switching device and which maintains a constant voltage between a positive electrode and said negative electrode, a high side auxiliary switching device which connects said positive electrode of said constant-voltage source to said high side scan switching device, a low side auxiliary switching device which connects between both ends of the series connection of said high- and low-side scan switching devices, and an auxiliary switch driving section which turns on and off said high- and low-side auxiliary switching devices alternately; and wherein said reset pulse generating section, when raising said reset voltage pulse to its upper limit, suppresses the turn-on of said high side auxiliary switching device by said auxiliary switch driving section, so as to turn off both of said high- and low-side auxiliary switching devices.