The Effects of Sustain Electrode Gap Variation on the Luminous Efficacy in Coplanar-Type AC Plasma Display Panel Under Low- and High-Xe Content Conditions

摘要

We investigated the effect of sustain electrode gap variation with various Xe content gas in a coplanar-type ac plasma display panel through 2-D numerical simulation to understand the inherent high-luminous-efficacy mechanism. For the low-Xe content gas condition of 5%, the optimal sustain electrode gap was found to be about 200 $muhbox{m}$, because of the steep decrease of electric power delivered to electrons with the increase of electrode gap longer than 200 $mu hbox{m}$. On the other hand, with the high-Xe content gas of 20%, the efficacy continuously increased as the electrode gap increased beyond 200 $muhbox{m}$ . We have found that the high luminous efficacy under the condition of long electrode gap and high-Xe content gas is due to the high-electron-heating efficacy in the cathode sheath region.