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Stepped Dielectric Structure for AC Plasma Panel

IP.com Disclosure Number: IPCOM000051776D
Original Publication Date: 1981-Mar-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Aboelfotoh, MO: AUTHOR [+2]

Abstract

Gaseous discharge display devices are generally fabricated by forming conductors on glass plates, overcoating the conductors with a dielectric layer, utilizing a coating of refractory secondary emissive material, such as magnesium oxide, over the dielectric, sealing the two glass plates about their edges, and filling the panel with a Penning gas mixture, such a neon-argon.

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Stepped Dielectric Structure for AC Plasma Panel

Gaseous discharge display devices are generally fabricated by forming conductors on glass plates, overcoating the conductors with a dielectric layer, utilizing a coating of refractory secondary emissive material, such as magnesium oxide, over the dielectric, sealing the two glass plates about their edges, and filling the panel with a Penning gas mixture, such a neon-argon.

The normal operations performed by AC gaseous discharge display devices are write, sustain and erase. The static margin of gaseous discharge devices is defined as the difference between the maximum and minimum sustain voltages,
i.e., V(s) max. and V(s) min., and a voltage level intermediate these values is selected for the operating point. In order to operate the panel dynamically, a relatively large value of static margin is required. In large area gaseous discharge display panels, an appreciable loss of static margin may occur primarily because of the higher value of V(s) min about the peripheral areas of the panel.

Conventionally, the minimum sustain voltage occurs on the periphery of the active display area of the panel, where the chamber gap is larger than the gap in the interior of the panel. This can be compensated for by increasing the cell capacitance per unit area, thereby increasing the cell wall voltage for cells in this display region. This increased cell capacitance per unit area is achieved by decreasing the dielectric thickness ar...