The improvement of luminous efficiency through the addition of a small amount of Kr gas into the conventional He-Ne-Xe gas

Abstract

A new four-component gas, He-Ne-Xe-Kr, is proposed in order to achieve a high luminous efficiency (maximum electric discharge) in color AC PDP. The model utilized here is based on self-consistent simulation of the microdischarges in the PDP cell. The space and time variation of the electric field within the cell is self-consistently determined by solving the fluid equations for ions and electrons together with Poisson's equation, subject to the boundary conditions imposed by the electrode boundaries. The electrical model is coupled to a model of excited species kinetics. The density of Xe* (P-3(1)) and electron, which is critical in determining the luminous efficiency, was calculated using the two-dimensional model. The results were then compared with measurements of luminous efficiency to identify the optimum mixing condition of He(70): Ne(27): Xe(3)-Kr gas for a color PDP. The result was that the luminous efficiency has been improved considerably (about 20 %) with a 0.0125 % Kr addition, compared with the He-Ne-Xe (70:27:3) mixing gas.