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Plasma Panel Serving As a Display and Computer Input Device Using an Emissive Display Device for Input and Output of Data

IP.com Disclosure Number: IPCOM000038803D
Original Publication Date: 1987-Mar-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Campagna, FJ: AUTHOR

Abstract

An input/output device based on a plasma display technology uses a planar plasma panel construction to eliminate the spacer requirement, while making the upper viewing surface available for use as a digitizing tablet. Referring to the drawing, alternate conductors 12 separated by dielectric 14 function as drive lines from one axis of the display. A second set of orthogonal conductors (not shown) are positioned immediately above, but insulated from, conductors 12. A plurality of barrier electrodes 16 are positioned adjacent each conductor in both axes to prevent charge spreading in the drive lines.

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Plasma Panel Serving As a Display and Computer Input Device Using an Emissive Display Device for Input and Output of Data

An input/output device based on a plasma display technology uses a planar plasma panel construction to eliminate the spacer requirement, while making the upper viewing surface available for use as a digitizing tablet. Referring to the drawing, alternate conductors 12 separated by dielectric 14 function as drive lines from one axis of the display. A second set of orthogonal conductors (not shown) are positioned immediately above, but insulated from, conductors 12. A plurality of barrier electrodes 16 are positioned adjacent each conductor in both axes to prevent charge spreading in the drive lines. The viewing side of the upper surface plate 20 contains a layer of indium tin oxide metallurgy, a material used in conventional digitizers, while the lower surface of plate 20 includes signal output wiring 22, which supplies position information in digital form for storage, manipulation and/or display. The digitizer converts the analog position information into digital form, while a stylus 24 acts as an electronic sensor in reporting its coordinate position in a digital format.

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