Patent ID: 7969388

Claim:
A plasma display device comprising: a plasma display panel in which a discharge cell is formed at an intersection of a scan electrode and a sustain electrode disposed in parallel and a data electrode disposed orthogonal to the scan electrode and the sustain electrode; and a scan drive circuit for applying a voltage waveform to the scan electrode; wherein one field comprises a plurality of subfields including at least a luminescence sustain period and a write period, the one field includes at least one set of successive two subfields including a predetermined subfield and a preceding subfield followed by the predetermined subfield, the predetermined subfield has a smaller number of sustain pulses than that of the preceding subfield, a number of sustain pulses applied to the discharge cell of each subfield from a beginning subfield to the preceding subfield followed by the predetermined subfield of the one field is gradually larger than a number of sustain pulses of a preceding subfield, a number of sustain pulses applied to the discharge cell of each subfield from the predetermined subfield to the last subfield of the one field following the predetermined subfield of the one field is gradually larger than a number of sustain pulses of a preceding subfield, the scan drive circuit applies, in the one field, only a first initialization waveform in an initialization period of the subfield having the smallest number of sustain pulses and only a second initialization waveform in an initialization period of the predetermined subfield, and a peak voltage of the first initialization waveform applied to the subfield having the smallest number of sustain pulses is higher than a peak voltage of the second initialization waveform applied to the predetermined subfield.