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Abstract

A plasma display panel device according to the present invention is provided for preventing a generation of unevenness of luminance caused by lowering a discharge voltage applied to cells according to a difference between display load rates. To achieve the above-described objects, the plasma display device according to the present invention employs a phenomenon where voltage drops applied to cells become larger according to a display load rate at a sustain discharge period, as the luminance becomes lower and wall charges accumulated on the cells after the sustain discharge becomes lower as well. In other words, the present invention is characterized in that a prescribed erase pulse and sustain discharge pulse are applied to X and Y electrodes in the sustain discharge period. When the display load rate is lower, a scale of the sustain discharge at each cell is larger and the amount of wall charges at each cell is not lower. Therefore, the plasma display device according to the present invention selectively erases, by applying the prescribed erase pulse, only the cells where a scale of the sustain discharge is large enough to generate sufficient luminance, and compensates the luminance, by generating the sustain discharge due to the sustain discharge pulse thereafter, for the cells where a scale of the sustain discharge is small not enough to generate the sufficient luminance.

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First Claim