Browse Prior Art Database

Electroluminescent Display Board

IP.com Disclosure Number: IPCOM000098535D
Original Publication Date: 1959-Feb-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

O'Connell, JA: AUTHOR

Abstract

A luminous written display may be produced by writing with a properly energized graphite pencil or other conductive writing implement, which can deposit conductive material on an electroluminescent surface mounted on a transparent electrode.

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Electroluminescent Display Board

A luminous written display may be produced by writing with a properly energized graphite pencil or other conductive writing implement, which can deposit conductive material on an electroluminescent surface mounted on a transparent electrode.

The graphite is used to complete an AC electroluminescent circuit to produce light.

A lead from a power supply, insulated to protect the user, is attached to a writing implement, the other lead from the power supply being connected to the transparent electrode on which electroluminescent phosphor is deposited. As long as the implement is held to the surface, there is a luminous display of all information, written in a continuous line.

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