Polymeric piezoelectric key actuated device

Details Polymeric piezoelectric key actuated device Polymeric piezoelectric key actuated device

1974-04-24

1976-02-24

Budd, Mark O.

Electrical generator or motor structure

Educational or construction units or kits

310 83, 310 86, 310 91, 310 95, 340265, 200181, H01L 4104

Patent

active

039406377

ABSTRACT:
A key input device which forms a key switch with high reliability or an integrated keyboard with small dimensions which can produce coded signals with high reliability and a S/N ratio of high value without any encoder circuits, comprising a piezoelectric polymer film, applied as a pressure sensor, having layer electrodes on both surfaces thereof and at least one device for straining the film, the straining device defining a key.

REFERENCES:
patent: 3365593 (1968-01-01), Roof et al.
patent: 3464531 (1969-09-01), Herr et al.
patent: 3648279 (1972-03-01), Watson
patent: 3798473 (1974-03-01), Murayama et al.
patent: 3832580 (1974-08-01), Yamamuro et al.

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