Patent ID: 7391392

Claim:
A method for driving a display panel based on each of a plurality of subfields which define each field of an input image signal, such that the display panel carries out grayscale display, the display panel having a plurality of pixel cells which serve as pixels, the plurality of pixel cells being arranged in a matrix pattern, each said subfield having its own weighting, wherein: each said subfield includes an address process for setting each said pixel cell within each said subfield to either light-emitting mode or lights out mode based on the input image signal; and a sustain process for causing only those pixel cells which are set to said light-emitting mode to emit light for a period corresponding to the weighting of each said subfield, and wherein some pixel cells selected at random from among said plurality of pixel cells are forcibly set to said light-emitting mode during said address process of said subfield having a small weighting only when said input image signal continues to indicate a black display for a predetermined period of time.