Patent ID: 7852295
Filing Date: 2010-12-14
Classification: G09G

Abstract:
1. A method of driving a plasma display device including a first electrode, a second electrode, a third electrode crossing the first electrode and the second electrode, and a discharge cell defined by the first electrode, the second electrode, and the third electrode, the method comprising: dividing a field into a plurality of subfields; applying a plurality of first sustain pulses to the first electrode and a plurality of second sustain pulses to the second electrode during a sustain period of a first subfield of the plurality of subfields; gradually increasing a voltage at the first electrode from a first voltage to a second voltage during a sub-reset period of a second subfield being consecutive to the first subfield; and gradually decreasing the voltage at the first electrode from a third voltage to a fourth voltage during the sub-reset period, wherein the plurality of second sustain pulses are divided into at least a first group and a second group, and the second group includes the last one of the second sustain pulses, and wherein a second sustain pulse of the second group is different from a second sustain pulse of the first group, wherein the method further comprises: applying a fifth voltage to the second electrode while gradually increasing the voltage at the first electrode; applying a sixth voltage that is higher than the fifth voltage to the second electrode while gradually decreasing the voltage at the first electrode; in a main reset period of a third subfield of the plurality of subfields, wherein the third subfield is consecutive in time to the second subfield: gradually increasing the voltage at the first electrode from a seventh voltage to an eighth voltage while applying a ninth voltage to the second electrode; and gradually decreasing the voltage at the first electrode from a tenth voltage to an eleventh voltage while applying a twelfth voltage that is higher than the ninth voltage to the second electrode, wherein the difference between the second voltage and the fifth voltage is less than the difference between the eighth voltage and the ninth voltage.