Plasma display and driving method thereof

A plasma display device, comprising:

• a plurality of scan electrodes;
• a plurality of sustain electrodes;
• a controller dividing one frame into a plurality of subfields, each subfield including a reset period, an address period, and a sustain period, and grouping the plurality of subfields into a plurality of groups according to the number of sustain discharge pulses;
• and
• a driving circuit applying a sustain discharge pulse to the scan electrodes and the sustain electrodes with opposite polarities during a sustain period according to a control of the controller,
• wherein the controller sets a width of a last sustain discharge pulse applied during the sustain period to be greater than a width of other sustain discharge pulses during a sustain period of a first group among the plurality of groups, the first group having a total number of sustain discharge pulses applied during the sustain period less than a predetermined number, and to be equal to the other sustain discharge pulses during the sustain period of other groups.

A plasma display device, comprising:

• a plurality of first electrodes;
• a plurality of second electrodes;
• a controller dividing one frame into a plurality of subfields, each subfield including a reset period, an address period, and a sustain period, and grouping the plurality of subfields into a plurality of groups according to the number of sustain discharge pulses;
• and
• a driving circuit applying a sustain discharge pulse, alternately having a positive first voltage and a negative second voltage, to the first electrodes and applying a third voltage to the second electrodes according to a control of the controller,
• wherein the controller sets a width of a last sustain discharge pulse applied to the first electrodes to be greater than a width of other sustain discharge pulses for selected subfields during a sustain period of a first group among the plurality of groups.