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New Gray Scale Implementaion Method for Improving Dynamic False Contours in ac PDPs  

Jung Young-Ho (Dept. of Electronics Eng., Suwon University)
Jeong Ju Young (Dept. of Electronics Eng., Suwon University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.41, no.1, 2004 , pp. 1-8 More about this Journal
Abstract
We developed a new PDP gray scale implementation method on the basis of the quantized memory addressing(QMA) principle. We defined three wall charge states; 'fully-on', 'off', and 'half-on', by controlling the width of address pulses. With these three wall charge state, we were able to express 255 level gray scale with only 7 sub-fields. Furthermore, in contrast to the conventional driving methods, the sub-field combinations for any two adjacent gray levels differ by only 1 sub-field, at worst, and therefore, eliminate the dynamic false contours. Since this method use 7 sub-field, the sustain discharge Period is increased by more than $70\%$ compared to the 12 sub-field method which reduces the dynamic false contours.
Keywords
PDP; Flat Display; driving technology; gray scale; wall charge; PWM;
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