Mechanical-to-acoustical transformer and multi-media flat film speaker
First Claim
1. An acoustic transducer that converts a mechanical motion into acoustical energy, said acoustic transducer comprising:
- a diaphragm that is curved;
at least one support on at least one portion of said diaphragm; and
at least one actuator operatively coupled to said diaphragm and spaced from said support, said actuator configured to move such that movement of said actuator produces corresponding movement of said diaphragm, said diaphragm movement being amplified with respect to said actuator movement, wherein said diaphragm is made of a sheet of optically clear material.
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0 Petitions
Accused Products
Abstract
A mechanical-to-acoustical transducer has at least one actuator, preferably a piezo motor, that is coupled, generally perpendicularly, to one edge of a diaphragm formed from a thin, flexible sheet material. The diaphragm is fixed at a point spaced from the actuator in the direction of its motion so that excursion of the actuator is translated into a corresponding, mechanically-amplified, excursion of the diaphragm—typically amplified five to seven times. The diaphragm is curved, preferably parabolically, and to a small degree. The diaphragm, if optically clear, can be mounted on a frame over a video display screen to provide a screen speaker. Preferably, such a screen speaker is pinned or adhered at upper and lower edges at or near its vertical centerline and is supported by and driven at both lateral edges by one or more single layer piezo actuators. The actuators are secured at one end to the frame or other stationary member, and at a free, movable end, to an edge of the diaphragm, generally at right angles. A gasket seals the edges of the diaphragm to maintain an acoustic pressure gradient across the diaphragm.
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Citations
48 Claims
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1. An acoustic transducer that converts a mechanical motion into acoustical energy, said acoustic transducer comprising:
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a diaphragm that is curved; at least one support on at least one portion of said diaphragm; and at least one actuator operatively coupled to said diaphragm and spaced from said support, said actuator configured to move such that movement of said actuator produces corresponding movement of said diaphragm, said diaphragm movement being amplified with respect to said actuator movement, wherein said diaphragm is made of a sheet of optically clear material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An acoustic transducer that converts a mechanical motion into acoustical energy, said acoustic transducer comprising:
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a diaphragm that is curved; at least one support on at least one portion of said diaphragm; and at least one actuator operatively coupled to said diaphragm and spaced from said support, said actuator configured to move such that movement of said actuator produces corresponding movement of said diaphragm, said diaphragm movement being amplified with respect to said actuator movement, further comprising a seal at at least a portion of the periphery of said diaphragm to assist in maintaining the acoustic pressure gradient across said transducer. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. An acoustic transducer that converts a mechanical motion into acoustical energy, said acoustic transducer comprising:
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a diaphragm that is curved; at least one support on at least one portion of said diaphragm; and at least one actuator operatively coupled to said diaphragm and spaced from said support, said actuator configured to move such that movement of said actuator produces corresponding movement of said diaphragm, said diaphragm movement being amplified with respect to said actuator movement, wherein said support overlies a video screen display and said diaphragm is spaced from said screen display. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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Specification