Xe-excitation efficiency and plasma saturation in plasma display microdischarges

Abstract

Plasma display panel (PDP) efficiency data are correlated with panel emission measurements. A large visible/infrared (vis/IR) ratio of the phosphor emission in the visible to the Xe emission in the infrared indicates a high Xe-excitation efficiency. Monitoring the changes in the vis/IR ratio allows a decomposition of the discharge efficiency into Xe-excitation efficiency and electron heating efficiency contributions. For several different PDP efficiency dependencies on sustain voltage and frequency, consistent trends in Xe-excitation efficiency and electron heating efficiency are found. In addition, in order to follow the discharge development, the time dependence and the spatial distribution of the Xe emission are monitored. The combined results show that plasma saturation is significant to low Xe-content panels in default operation conditions and that plasma saturation decreases with the high voltage high frequency operation of high Xe-content panels. These driving conditions, which are especially suited for high Xe-content panels, govern a fast and spatially distributed discharge development with a lower effective electron temperature, increased Xe-excitation efficiency, and decreased plasma saturation.

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

“…1, 2 The fundamental property of microdischarge in a PDP cell has been experimentally investigated for the last 10 years, [3][4][5][6][7][8][9][10][11][12] and the high Xe concentration of the discharge gas becomes one of the most promising approaches to improve the luminous efficiency. 13,14 But, the condition of high Xe partial pressure accompanies an increase in breakdown voltage, and the development of new cathode material is strongly required for low voltage PDP operation.…”

“…The calculated vuv is also divided into three parts according to the energy flow in a PDP cell from the input electrical energy to the output vuv radiation energy, i.e., ͑a͒ electron heating efficiency ͑ e ͒, ͑b͒ Xe excitation efficiency ͑ excite ͒, and ͑c͒ efficiency transferred from the Xe excited atom to the VUV radiation ͑ transfer ͒. 3,9,10,24,25 e is defined as the ratio of energy to be transferred to electron from the electrical input energy, and excitation is the efficiency related to the production of Xe excited atom via the collision with the electron and Xe neutral atom. transfer also shows the ratio of energy converted to vuv radiation from the Xe excited atom.…”

Time‐averaged spatial profile of Xe excitation efficiency in PDPs

“…[1][2][3][4] Recently, the method for analyzing the electron heating efficiency, the conversion of electrical power into accelerated electrons, and Xe excitation efficiency which is the conversion efficiency of this electronic energy into VUV photons, is proposed. 5 In this method, the Xe excitation efficiency is determined by the ratio of the luminance to the IR emission intensity. In this paper, Xe excitation efficiency is analyzed for a color PDP, whereas previous works was performed with a PDP having only green phosphor.…”

51.4: Mechanism of Luminous Efficiency Improvement of High γ and High Xe Discharge

“…However, the discharge efficiency is still low when comparing with fluorescent lamp and excimer lamp which also applies gas discharge theory. Recently, high Xe content becomes a hot issue to improve luminous efficacy, since it can improve both of electron heating efficiency and Xe excitation efficiency under the condition of high sustain voltage [1]. However, the application of high Xe content will bring about the problem of great increase of firing voltage, since it needs higher electric field to initialize discharge.…”