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US 7,412,065 B2Granted
Acoustic transducer with folded diaphragm
AssigneeHarman International Industries, Incorporated
InventorsAn Duc Nguyen, Charles M. Sprinkle
Life of this patent
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Abstract
One embodiment of a low-profile transducer includes a at least one fin perpendicularly mounted on a planar diaphragm, with a voice coil mounted onto the fin. The voice coil may reside in a strong uniform magnetic field. The locations at which the diaphragm is connected to a frame may be coplanar with a center of mass of the diaphragm. The three-dimensional structure of diaphragm and fins may be formed using origami techniques.
Claims27
An acoustic transducer comprising:
- a sheet of diaphragm material folded into portions comprising:
- a substantially planar portion, and
- at least one fin portion, where a 90° fold in the sheet of diaphragm material is adjacent to a 180° fold in the sheet of diaphragm material;
- and
- a voice coil mounted on the fin portion.
2 more elements
A low-profile transducer comprising:
- a frame;
- a sheet of diaphragm material folded into portions comprising:
- a projection surface portion, and
- a fin portion, where a 90° fold in the sheet of diaphragm material is adjacent to a 180° fold in the sheet of diaphragm material;
- a magnet structure mounted on the frame, where the magnet structure produces a magnetic-field region in the gap;
- and
- an electrically conductive voice coil coupled to the sheet of diaphragm material and extending out of a plane of the projection surface;
- where the voice coil resides at least partially in the magnetic-field region.
5 more elements
Dependencies are inferred from the claim text.