Patent ID: 7619589
Filing Date: 2009-11-17
Classification: G09G

Abstract:
1. A plasma display comprising: a plasma display panel having a plurality of first electrodes and a plurality of second electrodes and for displaying image based on a screen load ratio of a subfield or a frame wherein each frame is divided into a plurality of subfields including a first subfield and a second subfield and each subfield has a weight value; a driver for applying a sustain pulse to die first electrodes or the second electrodes; and a controller for controlling a second frequency of the sustain pulse in the second subfield having a second screen load ratio to be higher than a first frequency of the sustain pulse in the first subfield having a first screen load ratio when the second screen load ratio of the second subfield is greater than the first screen load ratio of the first subfield, wherein the controller is adapted to increase a frequency of the sustain pulse by decreasing a sustain discharge voltage maintaining period of the sustain pulse when a sustain discharge voltage maintaining time is longer than a predetermined time, and wherein the controller is adapted to increase the frequency of the sustain pulse by decreasing a rising time or a falling time of the sustain pulse when the sustain discharge voltage maintaining time is equal to the predetermined time.