Film speaker using a piezo-electric element

Details Film speaker using a piezo-electric element Film speaker using a piezo-electric element

1987-09-16

1989-04-11

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310800, 310328, 310322, 381190, H01L 4108

Patent

active

048209520

ABSTRACT:
A film speaker has a film diaphragm for transducing mechanical vibrations into sound waves and a plurality of piezo-electric elements for transducing electrical elements for transducing electrical signals into electrical vibrations. The piezo-electric elements are arranged in first and second grooves of a frame. The first and second edges of the film diaphragm are held between end covers and the frame such that the film diaphragm is coupled to the piezo-electric elements, one portion of V-shaped cross section being coupled to one row of piezo-electric elements and another portion of V-shaped cross section being coupled to the other row of piezo-electric elements.

REFERENCES:
patent: 1873715 (1932-08-01), Meissner
patent: 4354134 (1982-10-01), Micheron
patent: 4401911 (1983-08-01), Ravinet et al.
patent: 4414436 (1983-11-01), Sashida et al.

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