Patent ID: 8031137
Filing Date: 2011-10-04
Classification: G09G

Abstract:
1. A method of driving a plasma display device, the plasma display device comprising a plasma display panel, the plasma display panel comprising a plurality of first electrodes, a plurality of second electrodes extending in a same direction as the first electrodes, a plurality of third electrodes crossing the first electrodes and the second electrodes, and a plurality of discharge cells, each of the discharge cells being located at a respective intersection where one of the third electrodes crosses one of the first electrodes and one of the second electrodes, the method comprising: receiving a video signal comprising a plurality of frames; dividing each of the frames of the video signal into a plurality of subfields having respective grayscale weights, each of the subfields comprising a reset period, an address period, and a sustain period; determining whether one of the frames of the video signal expresses only grayscales less than a reference grayscale; and when the one of the frames of the video signal expresses only grayscales less than the reference grayscale, performing a sustain pulse applying operation on the first electrodes and the second electrodes in at least one sustain pulse applying period in the sustain period of at least one of the subfields of the one of the frames of the video signal, and after performing the sustain pulse applying operation, performing a holding operation on the first electrodes and the second electrodes in at least one holding period in the sustain period of the at least one of the subfields of the one of the frames of the video signal, wherein the holding operation comprises maintaining the first electrodes and/or the second electrodes at a predetermined voltage in the at least one holding period, wherein the at least one of the subfields of the one of the frames of the video signal has a weight greater than a reference weight, and wherein the sustain period of the at least one of the subfields having a weight greater than the reference weight comprises a plurality of sustain pulse applying periods and at least one holding period arranged so that the sustain period of the at least one of the subfields having a weight greater than the reference weight begins with a first one of the sustain pulse applying periods and ends with a last one of the sustain pulse applying periods, and each one of the sustain pulse applying periods is followed by one of the at least one holding period except for the last one of the sustain pulse applying periods.