Energy loss mechanisms in the microdischarges in plasma display panels

Abstract

Low luminous efficacy is one of the major drawbacks of plasma display panels ͑PDPs͒, where the main limiting factor is the efficiency of the microdischarges in generating UV radiation. In this work we use a two-dimensional self-consistent fluid model to analyze the energy loss mechanisms in neon-xenon discharges in coplanar-electrode color PDPs and interpret experimental data on the luminous efficacy of these PDPs. The modeling results are in good agreement with the measured UV emission spectrum and measured trends in the efficacy. Most of the electrical input energy is transferred to ions and subsequently to the gas and the surface. The electrical energy transferred to electrons is mostly used for ionization and excitation, where the part used for xenon excitation largely ends up in UV radiation. The amplitude, frequency, and rise time of the driving voltage mainly affect the energy losses due to ion heating. The xenon content also affects the conversion of electron energy into UV energy.

Characteristics of a micro dielectric barrier discharge ignited by a cold cathode with high ion-induced secondary electron emission for plasma display panel

“…In the same manner as n e,peak , the vuv increases linearly to ␥ Xe . 24 It must be emphasized that the increase of VUV efficiency at high ␥ i is clearly observed also in our experiment. As shown in Fig.…”

Existence and global bounds for a fluid model of plasma display technology

“…The terms involving diffusion and mobility on the left-hand side are due to appropriate approximation of drift-diffusion, contributing to the electron energy flux. (See, e.g., [3,4,8,9] for more detailed explanations. )…”

Three-dimensional PIC/MC simulations of the sustain discharge pulse in an ACPDP

“…So, at most, one should consider fluid simulations, although extremely useful, as giving a qualitative picture of the discharge, rather than quantitative. (Note that recent modifications of fluid codes 3,4,7 which include a separate equation for the electron energy are capable of capturing some non-local discharge features; however, whether or not they produce more accurate quantitative results is still an open question. )…”

“…[1][2][3][4] They have provided very valuable information about the time-spatial evolution of the discharge (such as distribution of the electric field, electrons, ions, and excited species in the cell), and allowed us to investigate the dependence of different discharge parameters on the dielectric properties of the walls, electrode structure, gas mixture, etc. ; they also gave clues for the development of analytical theories.…”