Method and apparatus for reducing driver energy consumption

Method for reducing driver energy consumption of data drivers of a plasma display panel supplied by sequences of subfield data bits in form of a codeword having a predetermined number of bits, wherein energy associated to a cell is calculated by departing from values of neighboring cells in the same subfield, both in cases in which the bit corresponding to image data would be displayed and in a case in which a bit corresponding to the image data is inverted/toggled, the method comprising for each subfield:

• evaluating an input transition energy caused by bit transitions at the input of a data driver using a predetermined data driver power dissipation model, an input subfield bit value and the subfield bit value of neighbor cells,
• evaluating a toggle transition energy caused by toggle transitions using a predetermined data driver power dissipation model being a model representing data driver power dissipation, an inverted input subfield bit value and the subfield bit value of neighbor cells,
• accumulating the input transition energy from subfield to subfield, and
• inverting an input subfield bit if said accumulated input transition energy exceeds a cell energy limit value and if said toggle transition energy is smaller than said input transition energy to reduce driver energy consumption without a perceivable image quality degradation.