Key with selective symbol display and keyboard using such key

Details Key with selective symbol display and keyboard using such key Key with selective symbol display and keyboard using such key

1986-10-15

1990-01-30

Oberley, Alvin

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

341 22, H03K 1700

Patent

active

048976512

ABSTRACT:
The key comprises a movable part guided in a fixed support on a base plate and contacts which are closed when the key is depressed against the action of a return spring. The symbol associated with the key is displayed through a window in the key top by an LCD device with a matrix of display areas controlled by an integrated circuit bonded to the underside of the LCD device and fed with signals from the CPU via conductors which enable the integrated circuit to be programmed to define the symbol to be displayed, whereby the keys of a keyboard can be set to match the language currently being used. In an alternative embodiment the key is supported by a flat cable connected with an input circuit of the keyboard and the terminals of the LCD device.

REFERENCES:
patent: 4032931 (1977-06-01), Haker
patent: 4393379 (1983-07-01), Berting et al.
patent: 4500880 (1985-02-01), Gomersall et al.
patent: 4551717 (1985-11-01), Dreher
Jones, "Programmable Keytop Employing Electrochromic Display", IBM Technical Disclosure Bulletin, vol. 21, No. 4, Sep. 1978, pp. 1671-1672.
Ghosh et al., "Electronically Changeable Keyboard Key Inscriptions", IBM Technical Disclosure Bulletin, vol. 23, No. 3, Aug. 1980, pp. 1190-1193.

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