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Browse Prior Art Database

Universal Keyboard

IP.com Disclosure Number: IPCOM000083626D
Original Publication Date: 1975-Jun-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Young, JE: AUTHOR

Abstract

Fig. 1 shows a cathode-ray tube (CRT) 1 used as a universal keyboard. Faceplate 2 includes a number of individual transparent zones 3 through which individual symbols can be displayed. Fig. 2 is a cross-sectional view through faceplate 2. Transparent plastics moulding 4 is affixed to glass envelope 5 of CRT 1 by transparent adhesive 6. Bezel 7 formed of opaque plastics material surrounds each transparent zone 3 which is shaped as a lens.

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Universal Keyboard

Fig. 1 shows a cathode-ray tube (CRT) 1 used as a universal keyboard. Faceplate 2 includes a number of individual transparent zones 3 through which individual symbols can be displayed. Fig. 2 is a cross-sectional view through faceplate 2. Transparent plastics moulding 4 is affixed to glass envelope 5 of CRT 1 by transparent adhesive 6. Bezel 7 formed of opaque plastics material surrounds each transparent zone 3 which is shaped as a lens.

A character or other symbol displayed on phosphor layer 8 is viewed through zone 3. Embedded within transparent moulding 4 in proximity to zone 3 are sense wires 9, whose purpose is to sense the position of a finger on or close to the zone 3. Connection wires 10 from other zones and shield wires 11 are embedded deeper in moulding 4. Wires 10 and 11 are hidden from view behind bezel 7.

In use, CRT 1 is mounted in a terminal containing electronic circuit including a character generator: by suitable programming, any one of a number of character sets can be displayed on CRT 1. Thus a standard typewriter key layout, a data entry key layout, or standard APL key layout can be displayed, as well as special symbols determined by the terminal user. A few lines of data, usually those that have just been keyed, plus systems messages can be displayed on CRT 1 above the keyboard area.

Each key top or zone 3, shows only one character at a time. Multiple shifts into different fonts and different character sets are possible.

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