Abstract
We have been conducting computer simulations aiming to improve the luminous efficiency of plasma display panels (PDPs). This time, we made a comparative study to determine vacuum ultraviolet (VUV) efficiency by resonance radiation and molecular radiation of the opposed electrode structure in AC- and DC-type cells using the one-dimensional (1D) gas-discharge simulation. The results show that the luminous efficiency of the AC-type cell was approximately 30% higher than that of the DC-type cell under the conditions of a gas composition of He-Xe (10%) and a pressure of 40.0kPa. This is caused by the effect of the imprisonment of resonance radiation being small, because the VUV radiation of the AC-type cell is located near the phosphor. Therefore, because the effective lifetime of the resonance line is not extended, the decrease of the luminous efficiency by processes such as cumulative ionization and stepwise excitation is less than that of the DC-type. In addition, in the operation of the AC-type cell, the distributions of excited species related to VUV radiation and electron distribution are spatiotemporally difficult to overlap, the processes such as cumulative ionization and stepwise excitation are smaller, and the influence of decreasing the luminous efficiency is also less.
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