Patent ID: 7327333

Claim:
A method for displaying pictures on a plasma display panel by dividing, into a plurality of sub-fields, each of frames respectively corresponding to pictures to be displayed on the plasma display panel, based on an input video signal, and combining luminance weights of the sub-fields to display gray scales, wherein the plurality of sub-fields are divided into a first sub-field group and a second sub-field group having sub-fields of a number less than a number of sub-fields in the first sub-field group, wherein the method comprises: fixing a start point of the first sub-field group and an end point of the second sub-field group when the input video signal has a load ratio not higher than a predetermined threshold value, and applying sustain pulses of a number determined in accordance with the load ratio; and fixing an end point of the first sub-field group and the end point of the second sub-field group when the input video signal has a load ratio higher than the predetermined threshold value, and applying sustain pulses of the number determined in accordance with the load ratio.