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The discharge characteristics, particularly the address discharge characteristics, were examined relative to an ambient temperature from -5°C to +65°C in an ac plasma display panel. As the ambient temperature increased, the statistical delay time decreased due to an increase in the exoelectron emission from the MgO surface by thermal activation. In contrast, the formative delay time increased due to an increase in the wall voltage variation during an address period. It was also found that the wall voltage variation during an address period depended on the level of the scan high voltage. Therefore, a temperature-adaptive driving waveform with multiscan high voltages is proposed to produce a stable address discharge irrespective of a variable ambient temperature.