49.2: Invited Paper : Realization of High Luminous Efficacy with Full HD AC PDP

Abstract We have investigated the effect of cell resolution change on the luminous efficacy of AC PDP with the 3‐dimensional computer simulation and experiment. The luminous efficacy decreased and the minimum sustain voltage increased as the resolution increased from VGA to full HD resolution, due to increased particle loss. A simple increase of the Xe content to realize the high luminous efficacy resulted in a much enhanced luminous efficacy decremental ratio as the cell resolution increases, because of the increased plasma loss and decreased electron heating efficacy. The increase of the sustain electrode gap from the commonly used value of 60μm to 140μm in the 50″ full HD cell with Ne‐Xe [20%] gas resulted in the luminous efficacy value comparable to that of the XGA cell with 60μm gap which indicates that a large electrode gap with a high Xe content gas is an effective way of realizing high luminous efficacies. However the excessive increase of driving voltage and the discharge time lag with the large electrode gap and high Xe content gas should be compromised in order to be used in the commercial product and increase the luminous efficacy further. A new cell structure with an auxiliary electrode (DIDE: Dual Ignition Discharge Electrode), optimized thickness of dielectric and phosphor layer, driving waveform, is demonstrated to show a luminous efficacy of 5.8 lm / W (Green, 25 kHz) with the address minimum voltage as low as 50V as an example of high luminous efficacy cell with low driving voltage.