Comb-shaped piezoelectric drive device

Details Comb-shaped piezoelectric drive device Comb-shaped piezoelectric drive device

1985-05-20

1986-12-30

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310331, 310366, 310367, H01L 4108

Patent

active

046331212

ABSTRACT:
A comb-shaped piezoelectric unit, such as may be used for a mechanical signal source or in a display device for displaying raised letters for reading by blind persons. The piezoelectric unit includes a plurality of strip-shaped drive members extending from a common base part, a first metal electrode layer on each of the drive members with the first metal electrode layers among the drive members being insulated from one another, and a common metal electrode layer formed on the other side of the drive members, connected commonly to all drive members. To construct a display device for the blind, pins are attached to the free ends of each of the drive members, the pins being protrudable through respective holes in a rigid plate when the corresponding drive members are actuated by applying a voltage thereto.

REFERENCES:
patent: 3229387 (1966-01-01), Linvill
patent: 4072959 (1978-02-01), Elmqvist
patent: 4112279 (1978-09-01), Brohard
patent: 4420266 (1983-12-01), Kolm et al.
patent: 4450375 (1984-05-01), Siegal

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