Patent ID: 7253825

Claim:
A panel driving apparatus comprising: a subfield processor which divides one frame into a plurality of subfields and during each subfield, allocates different gradation weights to a plurality of groups into which the pixels of a panel are classified, during each subfield, while gradation weights allocated to the groups during one frame are same; a signal synthesis unit which generates an address signal for addressing only pixels to be lit later among the pixels and a sustain signal for sustain-discharging the addressed pixels, wherein the address signal and the sustain signal are applied during each of the subfields; and a pixel driving unit which selectively drives the pixels of the groups during each subfield depending on the address and sustain signals output from the signal synthesis unit, to determine a gradation of visual brightness of each of the pixels, wherein: while executing an address period on the pixels of one group during a subfield, the signal synthesis unit renders the pixels of the other groups to be idle, while executing a sustain period on the pixels of one group, the signal synthesis unit executes a sustain period on the pixels of groups that have already been addressed, and the signal synthesis unit determines a gradation for each pixel according to gradation weights allocated to the addressed subfields by selectively performing an address period with respect to the individual groups.