Improvement of emission characteristics in PDPs driven by RF pulses

Conventional AC Plasma Display Panels (PDP) have a relatively low efficienc y that is close to 1.5 lm/W, and only 1.5 similar to 20 % of the supplied e nergy is consumed by the Xe excitation. If the AC sustaining period is repl aced by an RF sustaining period, due to the oscillating, low electric field , almost 60 % of the supplied energy is spent in Xe excitation. For a feasi bility test, the UV generation and the green-phosphor excitation efficienci es were measured. The efficiencies in RF plasmas were ten times higher than those in AC plasmas. We invented a new hybrid-type PDP; the plasma was for med due to AC writing pulses; then, it was sustained by RF sustaining pulse s. Different gas compositions and different pressures were examined to achi eve the high luminance and luminance efficiency. The luminance during the R F-sustained period was 1500 similar to 2000 cd/m(2) in a Ne-Xe composition at 200 similar to 400 Torr. The luminance efficiency was around 4 lm/W.