Enhanced efficiency planar transducers
AssigneeEminent Technology Incorporated
InventorsF. Bruce Thigpen, Claude Jeff Raley
Life of this patent
Estimating the term…
Abstract
Planar magnetic transducers including diaphragms having electrical conductors thereon which are mounted within frames so that spaced magnets are disposed on opposite sides of central sound producing surface areas of the diaphragms. Pole elements are provided in spaced relationship between each of the magnets and extend inwardly toward the diaphragms so to form pole extensions for causing magnetic flux from the poles of the magnets proximate to the diaphragms to extend more densely and generally parallel to the electrical conductors between the magnets and the pole elements. Openings for acoustic waves are provided between the pole elements and adjacent magnets.
Claims20
A planar magnetic transducer comprising:
- a housing having opposing frame sections;
- a flexible diaphragm mounted between said frame sections and having electrical conductor segments thereon;
- a plurality of magnet means mounted within said housing and secured in spaced relationship with respect to one another to each of said frame sections, said magnet means having poles facing said diaphragm;
- pole elements extending from each of said frame sections toward said diaphragm, said pole elements being spaced between and from each of said magnet means;
- an opening between at least one of said magnet means and at least one of said pole elements through at least one of said frame sections to allow acoustic waves to pass therethrough whereby magnetic flux from poles of said magnet means is partially directed generally parallel to said diaphragm from said like poles of said magnet means to said pole elements.
A planar magnetic transducer comprising:
- a housing having opposing frame sections;
- a flexible diaphragm mounted between said frame sections and having electrical conductor segments thereon;
- a plurality of magnet means mounted within said housing and secured in spaced relationship with respect to one another to each of said frame sections, said magnet means having like poles facing said diaphragm and being aligned with one another on opposite sides of said diaphragm and opposite poles engaged to said frame sections;
- pole elements extending from each of said frame sections toward said diaphragm, said pole elements being spaced between and from each of said magnet means at a distance wherein magnetic flux from said like poles will extend at least partially to said pole elements;
- and
- openings between said magnet means and said pole elements through which acoustic waves may pass whereby magnetic flux from like poles of said magnet means is partially directed generally parallel to said diaphragm toward said poles elements.
Dependencies are inferred from the claim text.