Seung-Hyun Son

Discharge characteristics of plasma display panel with box-shaped apertures in transparent dielectric layer

This article presents an improved front panel structure for an alternating current plasma display panel (ac-PDP) based on a transparent dielectric layer with a box-shaped aperture between the sustain electrodes. The suggested structure can reduce driving voltages than conventional ac-PDPs due to a strong electric field between the sustain electrodes. Experiments were conducted with 10% and 20% Xe contents at a gas pressure of 450Torr, and the results confirmed that the structure with the box-shaped apertures reduced the firing and sustain voltages by about 83.6 and 45.2V than the conventional structure at 10% Xe content, respectively. Also, the proposed structure with a 20% Xe content improved the luminous efficiency and the luminance by about 21.2% and 19.7%, respectively, when compared to a conventional structure with a 10% Xe content at the same sustain voltage. In addition, the discharge and dynamic characteristics show that the suggested structure is very suitable for high-resolution plasma display p...

Characteristics of plasma display panel with ridged dielectric and hollow gap between sustain electrodes

This article presents a front panel structure for an alternating current plasma display panel (AC-PDP) based on a ridged transparent dielectric layer and long hollow gap between the sustain electrodes. The suggested structure can reduce a firing voltage and sustain voltage than a conventional AC-PDP due to a strong electric field between the sustain electrodes. Experiments were conducted with various Xe contents from 10% to 50% at a gas pressure of 450 Torr, and the results confirmed that the ridged dielectric structure reduce the firing and sustain voltages by about 74 and 79 V at 10% Xe content than a conventional structure with 10% Xe content, respectively. Also, the proposed structure improve the luminous efficiency and luminance by about 50.9% and 33%, respectively, with a 50% Xe content when compared to a conventional structure with a 10% Xe content at a similar driving voltage.

Production efficiency of excited atoms in PDP cells with grooved dielectric structures studied by laser absorption spectroscopy

Performances of microplasmas in unit discharge cells with grooved structures in the dielectric layer covering the coplanar electrodes were investigated in alternating current (ac)-type plasma display panels filled with Ne-Xe(10%) mixture at 450 torr. The diagnostics are based on a microscopic laser-absorption spectroscopy technique for the spatiotemporally resolved measurements of absolute densities of Xe/sup */(1s/sub 5/,1s/sub 4/) atoms, from which the production rate and the efficiency of the vacuum ultraviolet photons were estimated. These results were compared with previously reported data obtained in conventional phosphor coated panels with the same structures for the dependences on the applied sustain voltages. As the result, the following conclusions were ascertained. The grooved structure does not help to improve the luminous efficiency but it helps to lower the firing and sustaining voltages by about 20 V if the electrode gap is kept constant. Therefore, it provides additional possibilities for the selection of other operating conditions such as the gas composition and pressure for the improvements of the luminance and the luminous efficiency.

8.2: New Electrode Structure to Improve Discharge Characteristics in AC PDPs

A new structure including igniter electrode is proposed to achieve a low sustaining voltage and high luminous efficacy. By measuring minimum sustaining voltage(Vsm), discharge current(Ion), displacement current(Ioff) and brightness of the light from a 6-inch AC PDP, performances of the conventional structure and the igniter structure are compared. When compared with the conventional structure, the igniter structure showed 10% Vsm improvement at the Ne-Xe(10%) gas mixture of 600 mbar. Therefore, we could apply the higher partial pressure of Ne-Xe(12%) to the igniter structure, which results in 42% luminous efficacy improvement at the similar sustaining voltage range.

14.4: Plasma Display Panel with Ridged Dielectric Layer between Sustaining Electrodes

This article presents a front panel structure for an alternating current plasma display panel (AC PDP) based on a ridged transparent dielectric layer between the sustaining electrodes. Compared to a conventional AC PDP, the suggested structure can reduce a firing voltage and sustaining voltage due to a strong electric field between the sustaining electrodes. First experiments were conducted to see the effect of ridged dielectric structure in the short electrode gap of 110 μm with various Xe contents from 10% to 50% at a gas pressure of 450 Torr, and the results confirmed that the ridged dielectric structure reduced the firing and sustaining voltages by about 74 and 79 V at 10% Xe content compared to a conventional structure with 10% Xe content, respectively. Also, the proposed structure improved the luminous efficacy and luminance by about 50.9% and 33%, respectively, with 50% Xe content when compared to a conventional structure with 10% Xe content at a similar driving voltage. Second, performances of the conventional structure and the ridged dielectric structure with the electrode gap of 140 μm were compared. Experimental results confirmed that the box shaped ridged dielectric structure could be driven at a lower voltage than conventional AC-PDPs with the same Xe content. Also, the luminous efficacy of box shaped ridged dielectric structure was higher than those of conventional structures.

P‐176L: Late‐News Poster: Improvement of Luminous Characteristics of AC‐PDP with Long Discharge Path Using Ridged Front Dielectric Layer

The luminous characteristics of the LDP (Long Discharge Path: 500 μm)-PDP with a ridged front dielectric layer were investigated, where the ridged front dielectric layer means that the dielectric layer between the sustain electrodes was etched out completely using the Sand-blasting process. In the LDP-PDP of which the main discharge is produced along the address electrode, the higher luminance was obtained due to the improved visible transmittance in the ridged front dielectric layer, thereby contributing to improving the luminous efficiency of a LDP-PDP with a ridged front dielectric layer. As a result, it was observed that the luminance of the LDP-PDP with a ridged front dielectric layer increased about 16∼17 %, when compared to that of the LDP-PDP cell with a conventional dielectric layer, whereas the corresponding luminous efficiency was improved about 12∼14 % due to the slight increase in the discharge current.