Patent ID: 8031135
Filing Date: 2011-10-04
Classification: G09G

Abstract:
1. A plasma display apparatus for driving a plurality of frames comprising a plurality of sub-fields wherein a sub-field is divided into a reset period, an address period and a sustain period and the sub-fields are driven during a normal driving period, the plasma display apparatus comprising: a plasma display panel comprising a scan electrode and a sustain electrode; and a controller configured to apply sub-sustain pulses to the scan electrode and the sustain electrode alternately, and to apply a plurality of consecutive sub-reset pulses to the scan electrode during a power-on sequence period including an energy charge period and a sub-reset period, the power-on sequence period beginning from when the plasma display apparatus is initially turned on and ending when the normal driving period begins, to display an image on a screen of the plasma display apparatus, wherein the sub-sustain pulses are applied during the energy charge period of the power-on sequence period, the sub-reset pulses are applied during the sub-reset period of the power-on sequence period, the normal driving period occurs after the completion of the power-on sequence period, and the power-on sequence period has a duration of plural frames, wherein each of the consecutive sub-reset pulses includes a first setup ramp pulse having a gradually increasing voltage, rising from a sustaining voltage level of the sub-sustain pulses applied during the energy charge period and having a maximum voltage level of the first setup ramp pulse higher than the sustaining voltage level of the sub-sustain pulses applied during the energy charge period, and a first setdown ramp pulse having a gradually decreasing voltage, falling from the sustaining voltage level of the sub-sustain pulses applied during the energy charge period and having a minimum voltage level of the first setup ramp pulse lower than ground voltage level, wherein the controller further applies a reset pulse during the reset period of the normal driving period of the sub-field, the reset pulse includes a second setup ramp pulse having a gradually increasing voltage, rising from the sustaining voltage level of the sub-sustain pulses applied during the energy charge period and having a maximum voltage level of the second setup ramp pulse higher than the sustaining voltage level of the sub-sustain pulses applied during the energy charge period and a second setdown ramp pulse having a gradually decreasing voltage, falling from the sustaining voltage level of the sub-sustain pulses applied during the energy charge period and having a minimum voltage level of the second setup ramp pulse lower than ground voltage level, and the maximum voltage level of the first setup ramp pulse is higher than the maximum voltage level of the second setup ramp pulse, wherein the energy charge period comes before the sub-reset period, the sub-sustain pulses are applied and the sub-reset pulses are omitted during the energy charge period, the sub-reset pulses are applied and the sub-sustain pulses are omitted during the sub-reset period, and the energy charge period is longer than the sub-reset period, and wherein at least two of the sub-reset pulses are applied to the scan electrode consecutively during the sub-reset period, and the sub-sustain pulses are omitted during the at least two of the sub-reset pulses applied consecutively.