Patent ID: 7940232
Filing Date: 2011-05-10
Classification: G09G

Abstract:
1. A driving method for a plasma display panel which has a plurality of row electrode pairs, a plurality of column electrodes formed so as to face the row electrode pairs via discharge spaces, and a plurality of discharge cells formed in areas where the plurality of row electrode pairs and the plurality of column electrodes cross respectively, wherein discharge gas is sealed in each discharge cell and both a fluorescent layer and a secondary emission material, which contacts the discharge space, are formed on each column electrode, the driving method comprising: dividing a display period in each field of an input video signal into a plurality of subfield periods; generating an address discharge in selected cells out of the discharge cells and setting the selected cells to either an emission enable state or a non-emission state, in an address period which is set in each subfield period; generating a sustaining discharge in a discharge space of discharge cells being set to the emission enable state, by applying at least one discharge sustaining pulse between a scanning electrode and a common electrode constituting each row electrode pair, in a discharge sustaining period following the address period; and decreasing the applied voltage between the scanning electrode and common electrode in steps when a final applied pulse out of the discharge sustaining pulses falls, and then decreasing the applied voltage toward a predetermined voltage having a polarity different from that of the maximum voltage of the final applied pulse.