| 摘要 |
A plasma display panel is provided with an accumulated time measuring circuit that measures an accumulated time for which an electric current passes through the plasma display panel and a scanning electrode driving circuit in which one field period is made up of a plurality of sub-fields (SF). Each sub-field is comprised of an initialization period during which a gradually dropping slope waveform voltage is applied to scanning electrodes (SC1-SCn), a writing period during which a negative scanning pulse (Va) is applied to the scanning electrodes (SC1-SCn), and a maintaining period. Further, the scanning electrode driving circuit generates the gradually dropping slope waveform voltage during the initialization period to initialize discharge cells and also generates the scanning pulse voltage (Va) to drive the scanning electrodes (SC1-SCn) during the writing period. The scanning electrode driving circuit changes the minimum voltage (Vi4) of the gradually dropping slope waveform voltage in accordance with the accumulated time the accumulated time measuring circuit has measured.
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