Patent ID: 7580050

Claim:
A driving method of a plasma display device by a plurality of subfields divided from a frame, the plasma display device having a plurality of first electrodes, a plurality of second electrodes, and a plurality of address electrodes that form discharge cells, and expressing gray scales by using combinations of subfields with respective weight values, the plurality of subfields being grouped into first and second groups of subfields with the first group of subfields comprising a subfield of a minimum weight value, the driving method comprising the steps of, in the first group of subfields: gradually reducing a voltage at the first electrode from a first voltage to a second voltage, during a reset period; applying at least one scan pulse to an electrode selected from the plurality of first electrodes, and simultaneously applying an address voltage to an address electrode of a discharge cell to be selected from among discharge cells applied with the scan pulse, during an address period; gradually increasing the voltage of the first electrode from a third voltage to a fourth voltage, in a sustain period; and applying a pulse of a fifth voltage to the address electrode for at least a partial period during which the voltage of the first electrode is gradually increased from the third voltage to the fourth voltage.