Patent ID: 6765547
Filing Date: 2004-07-20
Classification: G09G

Abstract:
A method of driving a plasma display panel having front and rear substrates opposite each other, parallel X and Y electrode lines formed on the front substrate between the front and rear substrates, and address electrode lines formed on the rear substrate in a direction perpendicular to a direction of the X and Y electrode lines to define discharge cells at intersections of the X and Y electrode lines and the address electrode lines, the X electrode lines being combined into X groups, the Y electrode lines being combined into Y groups such that adjacent pairs of the X and Y electrode lines belong to different pairs of the X and Y groups, the X electrode lines being commonly interconnected in units of the X groups, the Y electrode lines being commonly interconnected in units of the Y groups, the method comprising:erasing wall charges formed in the discharge cells of a previous sub-field; simultaneously applying a Y scan pulse of a first polarity to the Y electrode lines of a first pair of the X and Y groups which includes a first pair of the X and Y electrode lines, and an X scan pulse of a second polarity opposite to the first polarity to the X electrode lines of the first pair of X and Y groups so that wall charges of the second polarity are formed around the Y electrodes of the first pair of the X and Y electrode lines; simultaneously applying a display data signal corresponding to the first pair of the X and Y electrode lines to the address electrode lines, a bias voltage of the first polarity to the Y electrode lines of the first pair of the X and Y groups, and a bias voltage of the second polarity to the X electrode lines of the first pair of the X and Y groups, wherein the wall charges that have been formed at ones of the discharge cells which are not to be displayed are erased, and the wall charges of the second polarity are additionally formed around the Y electrodes of ones of the discharge cells which are to be displayed by the first pair of the X and Y electrode lines; repeatedly performing said applying the X and Y scan pulses and said simultaneously applying the display data signal and the bias pulses on the sequential remaining pairs of the X and Y electrode lines; and repeatedly applying a sustain pulse of the second polarity to all the Y electrode lines, and then applying a sustain pulse of the second polarity to all the X electrode lines for a time corresponding to a gray-scale of a current sub-field.