Touch keyboard

Details Touch keyboard Touch keyboard

1975-04-23

1976-07-20

Habecker, Thomas B.

Communications: electrical

Systems

With specific power supply

340166EL, 340324M, 340343, 340365C, 313201, 317DIG2, G08C 100

Patent

active

039710130

ABSTRACT:
A touch operated keyboard comprising an AC driven gas discharge panel display with conductive touch keys located to pick up an AC voltage from the stray field generated by the gas discharge panel is disclosed. A detector detects the drop in AC voltage level of a key due to the proximity of an operator's finger. The touch keys may be deposited upon the surface of the gas panel or upon a separate transparent sheet. The keyboard may be operated to change the information displayed by the gas panel.

REFERENCES:
patent: 2847615 (1958-08-01), Engelbart
patent: 3207905 (1965-09-01), Bray
patent: 3257658 (1966-06-01), Lloyd
patent: 3509408 (1970-04-01), Holz
IBM Tech. Discl. Bull. vol. 3, No. 11, Apr., 1961, p. 31, Goddard, "Non-Mechanical Keyboard."

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