Electric apparatus for displaying a plurality of key symbols on

Details Electric apparatus for displaying a plurality of key symbols on Electric apparatus for displaying a plurality of key symbols on

1979-12-04

1982-01-26

Groody, James J.

Communications: electrical

Audible indication

Percussion-type sound producer

340712, 350331R, 350334, G06F 302, G09F 935

Patent

active

043131085

ABSTRACT:
An electric apparatus is adapted to display a plurality of key symbols on a single passive display. A keyboard includes a plurality of input keys for selectively inputting at least numeral data and function data and input keys operated to selectively display key symbols representing numerals, functions, etc. A single passive liquid crystal display is arranged below the keyboard. A plurality of electrodes are arranged on the predetermined areas of the single passive display and the key symbols corresponding to the functions are selectively displayed, by a key operation, on the electrodes.

REFERENCES:
patent: 3956745 (1976-05-01), Ellis
patent: 4017848 (1977-04-01), Tannas
patent: 4078257 (1978-03-01), Bagley

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