Piezoelectric-type electroacoustic transducer
AssigneeKureha Kagaku Kogyo Kabushiki Kaisha
InventorShoji Uchikawa
Life of this patent
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Abstract
A piezoelectric-type electroacoustic transducer composed of two convex or concave piezoelectric polymer films each having electrodes on both surfaces thereof, said two polymer films being so connected to electric wiring that, when the one of the piezoelectric polymer films elongates by the action of an electric field in one direction, the other shrinks by the action of the same electric field.
Claims7
A piezoelectric-type electroacoustic transducer comprising two piezoelectric polyvinylidene fluoride films each having electrodes on both surfaces thereof, said films being so disposed that they face each other and are stretched into convex states by means of light weight solids inserted in the space between the two films, and said films being so connected to an electric circuit that, when the one of the piezoelectric films elongates by the action of an electric field in a direction, the other of the films shrinks by the action of the same electric field, whereby said films vibrate in phase with said solids.
Dependencies are inferred from the claim text.