The Long Last Sustain Method for Improving High-Temperature Misdischarge in an AC-PDP

Abstract

This paper proposes a long last sustain waveform to improve the high-temperature misdischarge in an AC-PDP. We have confirmed that, when applying the interval time during which the X electrode and the Y electrode are grounded before the reset period in the next subfield after the sustain period at high temperature, the VA minimum voltage is reduced. The interval time reduces the probability of exoelectron emission at high temperatures. Therefore, the interval time can improve the high-temperature misdischarge. However, due to the nature of the ADS driving method, there are limitations when increasing the driving time. Thus, we proposed the long last sustain waveform, in which either the X electrode or the Y electrode is applied to VS voltage, instead of the interval time. The VA minimum voltage is significantly decreased, when the long last sustain waveform was applied within the same interval time, rather than grounding the X and Y electrodes. In particular, the effect of the X long last sustain waveform showed the best results. We also proposed the ascending X long last sustain waveform to optimize the length of the long last sustain waveform according to each subfield. The ascending X long last sustain waveform further reduced the VA minimum voltage. In this paper, the VA minimum voltage can be decreased to approximately 12 V, by applying the proposed ascending X long last sustain waveform, in comparison with the existing drive method, at higher temperatures.