Patent ID: 8520037
Filing Date: 2013-08-27
Classification: G09G

Abstract:
1. A plasma display device comprising: a plasma display panel, the plasma display panel being driven by a subfield method in which a plurality of subfields is set in one field, each of the subfields has an initializing period, an address period, and a sustain period, a luminance weight is set for each of the subfields, and sustain pulses corresponding in number to the luminance weight are generated in the sustain period for gradation display, the plasma display panel having a plurality of discharge cells, the discharge cells having display electrode pairs, each of the display electrode pairs being formed of a scan electrode and a sustain electrode; an image signal processing circuit for converting an input image signal into image data showing light emission and no light emission in the discharge cells in each subfield; a sustain pulse generating circuit for generating and applying the sustain pulses alternately to the scan electrodes and the sustain electrodes of the display electrode pairs in the sustain period, the sustain pulse generating circuit including: the sustain pulse generating circuit generates the plurality of sustain pulses where lengths of at least one of a rising period and a falling period are different, and generates the sustain pulses by selecting a driving pattern according to the all-cell light-emitting rate and the partial light-emitting rate, among a plurality of driving patterns where the sustain pulses are generated in different combinations, the image signal processing circuit includes: a corrector for subtracting a multiplication result of output from the correction gain calculator and the input image signal, from the input image signal; and the load value calculator and the correction gain calculator calculate the correction gain by