Piezoelectric switch with tactile response

Details Piezoelectric switch with tactile response Piezoelectric switch with tactile response

1997-03-24

1999-11-09

Horabik, Michael

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

341 22, 200 5A, 200512, 310319, 310339, H03M 1100

Patent

active

059823046

ABSTRACT:
A piezoelectric keyswitch for providing tactile response comprises a bimorphic piezoelectric element anchored at its edge, and a keypad mounted on the bimorphic piezoelectric element spaced from the anchored edge so that depression of the keypad flexes the element to generate an electrical signal. A drive circuit responds to the electrical signal to provide a drive signal to bend the piezoelectric element to provide upward tactile feedback to the keypad.

REFERENCES:
patent: 4328441 (1982-05-01), Kroeger
patent: 4334280 (1982-06-01), McDonald
patent: 4521712 (1985-06-01), Braun
patent: 4857887 (1989-08-01), Iten
patent: 5189390 (1993-02-01), Fagard
patent: 5212473 (1993-05-01), Louis

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