Patent ID: 8154477

Claim:
A plasma display apparatus driven in a frame comprised of a plurality of subfields, the apparatus comprising: a plasma display panel including a scan electrode and a sustain electrode; and a driver configured to: in a first subfield, supply a reset signal to a scan electrode including a ramp-up signal having a gradually rising voltage and a ramp-down signal having a gradually falling voltage to the scan electrode during a reset period of a first subfield, at an end of the first subfield or a second subfield, supply a first signal, that rises from a first voltage to a second voltage, is maintained at the second voltage during a predetermined period of time, perpendicularly falls from the second voltage to a fourth voltage smaller than the second voltage, and at a reset period of the second subfield or a reset period of a third subfield, falls from the fourth voltage to a third voltage smaller than the first voltage with a slope, wherein the first subfield precedes the second subfield, and the second subfield precedes the third subfield, wherein a length of the predetermined period of time of the third subfield is longer than a length of the predetermined period of time of the second subfield, wherein the predetermined period of time is a first period in the second subfield of a first frame in case of a first gray level, and the predetermined period of time is a second period in the second subfield of a second frame in case of a second gray level larger than the first gray level, and wherein a length of the second period is longer than a length of the first period.