The discharge characteristics, particularly the address and sustain discharge characteristics, were examined relative to the He contents and panel working gas pressures under 11% Xe content in the 50-in. full HD AC-PDPs with a ternary gas mixture (Xe-He-Ne). The Xe content in this study was fixed at 11%. As the helium gas increases from 0 to 50%, the formative address delay becomes shortened by about 60 ns. In addition, the luminance are increased by about 15 cd/m(2) because of enlarging the Xe-2* excimer emission (823 nm) with an increase with the He gas. Also, the power consumption is reduced by about 30 W since the addition of He gas induces a reduction of cathode fall potential. The decrease in the gas pressure from 600 to 300 Torr causes a lower firing voltage, thereby resulting in reducing both the formative and statistical address delay times by about 71 ns and by about 65 ns, respectively. As a consequence, the pressure below 400 Torr and He content above 50% are the best panel factors suitable for high speed and low voltage driving of micro-discharge cells with the 50 in full HD cell size.