Lens moving apparatus and camera module including same

Patent metadata

Field	Value
Publication number	US-11005353-B2
Application number	US-201916580627-A
Country	US
Kind code	B2
Filing date	Sep 24, 2019
Priority date	Feb 4, 2015
Publication date	May 11, 2021
Grant date	May 11, 2021

Abstract

A lens moving apparatus, according to one embodiment, comprises: a bobbin having a first coil installed on the outer circumferential surface thereof; a location detection sensor equipped to the bobbin; a housing in which the bobbin is provided; an upper elastic member disposed on the upper side of the housing; and a support member that supports the housing such that the housing can move in a second or third direction that is perpendicular to a first direction, wherein the upper elastic member is divided into a plurality of parts, at least two of which are disposed parallel to each other on the x-y plane in the second or third direction and are disposed such that end portions thereof face each other.

First claim

The invention claimed is:

1. A lens moving apparatus comprising:
a housing;
a bobbin disposed in the housing;
a first coil disposed on the bobbin;
a magnet disposed on the housing;
an upper elastic member coupled to an upper portion of the bobbin and an upper portion of the housing;
a circuit member disposed under the housing and comprising a second coil opposite to the magnet in a first direction that is parallel with an optical axis direction;
a printed circuit board disposed under the circuit member;
a base disposed under the printed circuit board; and
a support member connecting the upper elastic member to the printed circuit board or the circuit member,
wherein the upper elastic member comprises a plurality of elastic members,
wherein at least two of the plurality of elastic members are disposed in parallel with each other in an x-y plane in a second direction perpendicular to the first direction or in a third direction perpendicular to the first and second directions, and
wherein the at least two of the plurality of elastic members form symmetry with respect to a center of the bobbin in the x-y plane.

2. The lens moving apparatus according to claim 1 , wherein the at least two of the plurality of elastic members overlap each other when the at least two of the plurality of elastic members are rotated 180 degrees with respect to the center of the bobbin in the x-y plane.

3. The lens moving apparatus according to claim 1 , wherein the elastic member comprises:
a first elastic member and a second elastic member disposed in parallel with each other in the x-y plane in the second direction; and
a third elastic member and a fourth elastic member disposed in parallel with each other in the x-y plane in the third direction.

4. The lens moving apparatus according to claim 3 , wherein the elastic member comprises a fifth elastic member and a sixth elastic member disposed in parallel with each other in the x-y plane in the second direction.

5. The lens moving apparatus according to claim 3 , wherein the first and second elastic members are in symmetry with respect to the center of the bobbin in the x-y plane.

6. The lens moving apparatus according to claim 3 , wherein the third and fourth elastic members are in symmetry with respect to the center of the bobbin in the x-y plane.

7. The lens moving apparatus according to claim 4 , wherein the support member comprises first to fourth support members corresponding to the first to fourth elastic members, and the first to fourth support members are electrically connected to the printed circuit board, and
wherein one end of each of the first to fourth support members is coupled to a corresponding one of the first to fourth elastic members.

8. The lens moving apparatus according to claim 7 , wherein the first coil is electrically connected to the first and second elastic members.

9. The lens moving apparatus according to claim 8 , comprising a position detection sensor disposed on the bobbin,
wherein the support member comprises a fifth support member electrically connected to the fifth elastic member and a sixth support member electrically connected to the sixth elastic member, and
wherein the position detection sensor is electrically connected to the third to sixth elastic members.

10. The lens moving apparatus according to claim 1 , wherein the bobbin is configured to be moved in the first direction by electromagnetic interaction between the first coil and the magnet, and
wherein the housing is configured to be moved in the second or third direction through electromagnetic interaction between the second coil and the magnet.

11. A lens moving apparatus comprising:
a housing;
a bobbin disposed in the housing;
a first coil disposed on the bobbin;
a magnet disposed on the housing;
a second coil disposed to be opposite to the magnet in a first direction parallel with an optical axis direction;
a printed circuit board disposed under the second coil and comprising a terminal surface and a plurality of terminals formed in the terminal surface; and
a base disposed under the printed circuit board and comprising a bent portion corresponding to the terminal surface of the printed circuit board,
wherein the terminal surface is bent from a side surface of the printed circuit board and is bonded to the bent portion of the base by an adhesive,
wherein a first recessed portion is formed on a portion of a lower surface of the base to which the terminal surface of the printed circuit board is bonded.

12. The lens moving apparatus according to claim 11 , wherein the first recessed portion surrounds at least a part of the bent portion of the base.

13. The lens moving apparatus according to claim 11 , wherein the base has a quadrangular outer shape when viewed in the first direction and the bent portion of the base is bent by extending from a side of the base.

14. The lens moving apparatus according to claim 13 , wherein the base comprises an escape disposed at a corner of the base, and the escape is spaced apart from a front end and a rear end of the bent portion of the base.

15. The lens moving apparatus according to claim 14 , wherein the first recessed portion surrounds at least a part of the front end and rear end of the bent portion.

16. The lens moving apparatus according to claim 11 , wherein a second recessed portion is formed on an upper surface of the base and wherein an excess of the adhesive is introduced into the second recessed portion.

17. The lens moving apparatus according to claim 16 , wherein the base comprises a hollow, and the second recessed portion is formed along a circumferential surface of the hollow.

18. The lens moving apparatus according to claim 17 , wherein the second recessed portion comprises a plurality of second recessed portions spaced apart from each other, and
wherein the second recessed portions are disposed along the circumferential surface of the hollow.

19. The lens moving apparatus according to claim 11 , comprising:
an upper elastic member coupled to the bobbin and the housing; and
a support member electrically connected to the upper elastic member and the printed circuit board.

20. A camera module comprising:
a lens; and
the lens moving apparatus for moving the lens according to claim 1 .

Assignees

• Lg Innotek Co Ltd

Inventors

• Park Sang Ok
• Yoo Kyoung Ho
• Lee Sung Guk
• Lee Seong Min
• Lee Jun Taek
• Son Byung Wook

Classifications

• H02K33/18

  with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets · CPC title

• G02B27/646

  compensating for small deviations, e.g. due to vibration or shake (movement of one or more optical elements for control of motion blur in cameras, projectors or printers G03B2205/0007; image stabilisation in cameras peculiar to the presence or use of an electronic image sensor H04N23/68) · CPC title

• H02K2203/12

  Machines characterised by the bobbins for supporting the windings · CPC title

• G02B7/09

  adapted for automatic focusing or varying magnification · CPC title

• H02K2201/18

  Machines moving with multiple degrees of freedom · CPC title