Plasma display device and control method therefor

A method for controlling a plasma display device comprising a plurality of sub-frames in one frame, each sub-frame having a reset period, an address period and a sustain discharge period,

• wherein, in said address period, a discharge for display selection occurs at least between first and second electrodes,
• at the end of said reset period, reset is performed by applying a gradient voltage pulse between said first and second electrodes, and
• the final gradient voltage pulse in said reset period has an identical polarity to that of a voltage applied between said first and second electrodes when the discharge occurs in said address period, and
• wherein said plurality of sub-frames is classified into first-type and second-type sub-frames,
• in the reset period of said first-type sub-frames, a gradient voltage pulse having the reverse polarity to that of said final gradient voltage pulse is applied between said first and second electrodes, prior to said final gradient voltage pulse,
• in the reset period of said second-type sub-frames, the gradient voltage pulse having the reverse polarity to that of said final gradient voltage pulse is not applied between said first and second electrodes, and
• wherein a plurality of said first-type sub-frames is existent in one frame, and the attained voltage of said gradient voltage pulse of reverse polarity in at least one first-type sub-frame among said plurality of first-type sub-frames is different from that of said gradient voltage pulse of reverse polarity in other first-type sub-frame.