Lens driving device, camera module and optical apparatus

Patent metadata

Field	Value
Publication number	US-12169322-B2
Application number	US-202318346954-A
Country	US
Kind code	B2
Filing date	Jul 5, 2023
Priority date	Jan 20, 2015
Publication date	Dec 17, 2024
Grant date	Dec 17, 2024

Abstract

A lens driving device is provided, including: a cover member; a bobbin installed with at least one lens and having a coil unit arranged on an outer circumferential surface of the bobbin; a magnet arranged at a positon corresponding to that of the coil unit; first and second elastic members, where one end of each of the first and second elastic members may be respectively coupled to an upper surface and a lower surface of the bobbin and supporting movement of the bobbin in an optical axis direction; a detection unit configured to detect movement of the bobbin in a direction parallel to the optical axis direction; a damping member arranged at a connecting portion between the bobbin and the first elastic member; and a support unit provided at at least one of the bobbin and the first elastic member and maintaining an arranged position of the damping member.

First claim

The invention claimed is:

1. A lens driving device, comprising:
a base;
a holder member disposed on the base;
a bobbin disposed in the holder member;
a first coil disposed on the bobbin;
a magnet disposed on the holder member;
a second coil disposed on the base;
an upper elastic member coupled with an upper surface of the holder member and the bobbin;
a wire coupled with the upper elastic member; and
a damping member disposed on the wire,
wherein the wire comprises a first area contacted with the damping member,
wherein the first area of the wire is disposed nearer to a lower end of the wire than to an upper end of the wire,
wherein the damping member is an elastically deformable material, and
wherein at least a portion of the damping member is disposed between the holder member and the wire in a direction perpendicular to an optical axis.

2. The lens driving device of claim 1 , comprising a lower elastic member coupled with a lower surface of the holder member and the bobbin.

3. The lens driving device of claim 2 , wherein the first area of the wire is disposed nearer to the lower elastic member than to the upper elastic member.

4. The lens driving device of claim 2 , wherein the damping member is overlapped with the lower elastic member in a direction perpendicular to an optical axis.

5. The lens driving device of claim 2 , wherein the damping member directly connects the lower elastic member and the wire.

6. The lens driving device of claim 2 , wherein a part of the magnet downwardly protrudes from the lower surface of the holder member.

7. The lens driving device of claim 2 , wherein the lower elastic member comprises an outer part coupled with the lower surface of the holder member, an inner part coupled with the bobbin, and a connection part connecting the outer part and the inner part, and
wherein at least a part of the damping member is disposed higher than the outer part of the lower elastic member.

8. The lens driving device of claim 7 , wherein the lower elastic member comprises a fixing piece extending from the outer part toward the wire, and
wherein the damping member disposed on the fixing piece of the lower elastic member.

9. The lens driving device of claim 8 , wherein the lower elastic member comprises a concave groove formed on an end of the fixing piece, and
wherein the concave groove of the lower elastic member is spaced apart from the wire.

10. The lens driving device of claim 1 , wherein the damping member is overlapped with the magnet in a direction perpendicular to an optical axis.

11. The lens driving device of claim 1 , wherein the damping member is coated on the first area of the wire, and
wherein the damping member is a gel material.

12. The lens driving device of claim 1 , wherein the damping member is spaced apart from the upper elastic member.

13. The lens driving device of claim 1 , wherein the wire comprises four wires disposed on four corners of the base, respectively, and
wherein the damping member comprises four damping members disposed on four wires, respectively.

14. A camera module, comprising:
a printed circuit board (PCB);
an image sensor disposed on the PCB; and
the lens driving device of claim 1 .

15. An optical apparatus, comprising the camera module of claim 14 .

16. A lens driving device, comprising:
a base;
a holder member disposed on the base;
a bobbin disposed in the holder member;
a first coil disposed on the bobbin;
a magnet disposed on the holder member;
a second coil disposed on the base;
an upper elastic member coupled with an upper surface of the holder member and the bobbin;
a lower elastic member coupled with a lower surface of the holder member and the bobbin;
a wire coupled with the upper elastic member; and
a damping member disposed on the wire,
wherein the wire comprises a first area contacted with the damping member,
wherein the first area of the wire is disposed nearer to a lower end of the wire than to an upper end of the wire,
wherein the lower elastic member comprises an outer part coupled with the lower surface of the holder member, an inner part coupled with the bobbin, and a connection part connecting the outer part and the inner part, and
wherein at least a part of the damping member is disposed higher than the outer part of the lower elastic member.

17. A lens driving device, comprising:
a base;
a holder member disposed on the base;
a bobbin disposed in the holder member;
a first coil disposed on the bobbin;
a magnet disposed on the holder member;
a second coil disposed on the base;
an upper elastic member coupled with an upper surface of the holder member and the bobbin;
a lower elastic member coupled with a lower surface of the holder member and the bobbin;
a wire coupled with the upper elastic member; and
a damping member contacted with the wire,
wherein the damping member is disposed nearer to the lower elastic member than to the upper elastic member,
wherein the damping member is an elastically deformable material, and
wherein at least a portion of the damping member is disposed between the holder member and the wire in a direction perpendicular to an optical axis.

18. The lens driving device of claim 17 , wherein the damping member is overlapped with the lower elastic member in a direction perpendicular to an optical axis.

19. The lens driving device of claim 17 , wherein the damping member directly connects the lower elastic member and the wire, and
wherein the damping member is coated on the first area of the wire.

20. The lens driving device of claim 17 , wherein the lower elastic member comprises an outer part coupled with the lower surface of the holder member, an inner part coupled with the bobbin, and a connection part connecting the outer part and the inner part, and
wherein at least a part of the damping member is disposed higher than the outer part of the lower elastic member.

Assignees

• Lg Innotek Co Ltd

Inventors

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

Classifications

• G02B27/646 Primary

  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

• 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

• G02B7/08 Primary

  adapted to co-operate with a remote control mechanism · CPC title

• G03B13/36

  Autofocus systems · CPC title

• G03B5/00

  Adjustment of optical system relative to image or object surface other than for focusing · CPC title