Planar magnet speaker

Patent metadata

Field	Value
Publication number	US-10499160-B2
Application number	US-201715723758-A
Country	US
Kind code	B2
Filing date	Oct 3, 2017
Priority date	Nov 4, 2016
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

A planar magnet speaker with excellent sound reproduction in a low frequency range and capable of providing a plurality of input controls includes a first magnet member, a second magnet member, a membrane including at least one wire formed between the first magnet member and the second magnet member, and a support frame.

First claim

What is claimed is:

1. A planar magnet speaker comprising:
a first magnet member comprising a plurality of first magnets, the plurality of first magnets being concentrically disposed;
a second magnet member spaced apart from the first magnet member and comprising a plurality of second magnets, the plurality of second magnets being concentrically disposed; and
a membrane provided between the first magnet member and the second magnet member and comprising one or more wires,
wherein the membrane is configured to generate sound according to a signal applied to the one or more wires, and
wherein an inner portion of at least two of the plurality of first magnets has an opening,
wherein the one or more wires comprise a first wire and a second wire,
wherein the first wire is configured to receive a first carrier signal having a first phase, and
wherein the second wire is configured to receive a second carrier signal having a second phase different from the first phase.

2. The planar magnet speaker of claim 1 , wherein the first magnet member is formed on a first plane, and
wherein the second magnet member is formed on a second plane, which is parallel to the first plane, and is spaced apart from the first magnet member.

3. The planar magnet speaker of claim 2 , further comprising:
a third magnet member on the first plane and comprising a plurality of third magnets having same shape and different sizes; and
a fourth magnet member on the second plane spaced apart from the first plane in a perpendicular direction and comprising a plurality of fourth magnets having same shape and different sizes,
wherein the plurality of third magnets are arranged to form a repulsion magnetic field with the plurality of fourth magnets,
wherein the first magnet member and the second magnet member form a concentric structure with respect to a first central axis, and the plurality of third magnets and the plurality of fourth magnets form a concentric structure with respect to a second center axis spaced apart from the first central axis, and
wherein a support frame supports the third magnet member and the fourth magnet member.

4. The planar magnet speaker of claim 1 , further comprising a support frame configured to support the first magnet member, the second magnet member, and the membrane.

5. The planar magnet speaker of claim 4 , wherein the support frame comprises a first magnet frame for supporting the first magnet member and a second magnet frame for supporting the second magnet member.

6. The planar magnet speaker of claim 5 , wherein the support frame further comprises a spacing frame provided between the first magnet frame and the second magnet frame to separate the first magnet frame and the second magnet frame by a predetermined distance.

7. The planar magnet speaker of claim 6 , wherein the support frame further comprises an edge member provided between the spacing frame and the membrane to support the membrane,
wherein the edge member is coupled along a periphery of the membrane.

8. The planar magnet speaker of claim 1 , wherein each of the plurality of first magnets are arranged at regular intervals from one another.

9. The planar magnet speaker of claim 1 , wherein the second magnet member is symmetrically arranged with respect to the first magnet member.

10. The planar magnet speaker of claim 1 ,
wherein the plurality of first magnets are arranged to have alternate polarities, and
wherein the plurality of second magnets are arranged to form a repulsion magnetic field with the plurality of first magnets.

11. The planar magnet speaker of claim 1 , wherein the signal comprises a sound signal, and the first and second carrier signals modulating the sound signal.

12. The planar magnet speaker of claim 11 , wherein the membrane may further comprise a pattern area in which the one or more wires are provided.

13. The planar magnet speaker of claim 12 ,
wherein the first wire and the second wire overlap in a direction parallel to a surface of the membrane.

14. The planar magnet speaker of claim 13 ,
wherein the first wire is configured to form a loop in the pattern area, and
wherein the second wire is configured to form a separate loop from the first wire in the pattern area.

15. The planar magnet speaker of claim 12 , further comprising:
at least one switch configured to switch connections between the one or more wires for adjusting an impedance of the planar magnet speaker.

16. The planar magnet speaker of claim 12 ,
wherein the membrane further comprises a first layer membrane and a second layer membrane in a stack structure, and
wherein a first wire, among the one or more wires, is provided in the first layer membrane and a second wire, among the one or more wires, is provided in the second layer membrane.

17. The planar magnet speaker of claim 1 , wherein the membrane is divided into a plurality of partition areas, and
wherein each of the partition areas comprises at least one wire, among the one or more wires, that forms a separate loop in the respective partition area.

18. The planar magnet speaker of claim 1 , further comprising a cover provided on one surface of the first magnet member or the second magnet member, wherein the cover has a mesh structure.

19. The planar magnet speaker of claim 1 , wherein each of the first magnet member and the second magnet member has a circular shape having a space therein, an elliptical shape having a space therein, a rectangular shape having a space therein, or a polygon shape having a space therein.

20. The planar magnet speaker of claim 1 , wherein the plurality of first magnets and the plurality of second magnets form a rectangular shape having an outer boundary and an inner boundary,
the planar magnet speaker further comprises:
at least one first linear magnet spaced apart by a first distance from a first magnet located at an outermost position among the plurality of first magnets; and
a second linear magnet spaced apart by a second distance from a second magnet located at an outermost position among the plurality of second magnets,
wherein the first linear magnet is arranged to form a repulsive magnetic field with the second linear magnet.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Lim Dong-Hyun
• Park Dong-Kyu
• Park Hae-Kwang
• Son Joon-Ho
• Jung Dong-Hyun
• Kim Han-Ki
• Song Young-Suk

Classifications

• H04R9/047

  in which the windings of the moving coil lay in the same plane · CPC title

• H04R9/025 Primary

  Magnetic circuit · CPC title

• H04R7/18

  at the periphery · CPC title

• H04R9/06 Primary

  Loudspeakers · CPC title

• H04R7/04

  Plane diaphragms · CPC title