Patent ID: 7515120

Claim:
An apparatus for removing a load effect in a plasma display panel, comprising: an average picture level (APL) calculation unit for calculating an average picture level (APL) value by using gray scale information corresponding to an inputted frame; a pulse number calculation unit for determining a number of reference sustain pulses that will be used in a current sub-field, based on the average picture level (APL) value from the average picture level (APL) calculation unit; a load calculation unit for calculating a ratio of cells that are selected to emit light based on the gray scale information, so as to calculate a load value in the current sub-field; and a compensation pulse number calculation unit for comparing a predetermined reference load with the load value outputted from the load calculation unit, and then outputting a number of compensated sustain pulses which is subtracted from or added to the number of sustain pulses for the current subfield based on a result of the comparison.