Lens driving device, camera module, and optical device

Patent metadata

Field	Value
Publication number	US-12374481-B2
Application number	US-202017637935-A
Country	US
Kind code	B2
Filing date	Sep 8, 2020
Priority date	Sep 9, 2019
Publication date	Jul 29, 2025
Grant date	Jul 29, 2025

Abstract

An embodiment of the present invention relates to a lens driving device comprising: a base; a housing; a bobbin; a first magnet; a first coil; a first substrate including a second coil; an upper elastic member; a lateral elastic member; a second magnet; and a sensor, wherein the bobbin comprises a recess in which the second magnet is disposed; the upper elastic member comprises an inner portion coupled to the bobbin, an outer portion coupled to the housing, and a connection part connecting the inner portion and the outer portion to each other, and the inner portion includes a first region overlapping the second magnet in the optical axis direction.

First claim

The invention claimed is:

1. A lens driving device comprising:
a base;
a housing spaced apart from the base;
a bobbin disposed in the housing;
a first magnet disposed on the housing;
a first coil disposed on the bobbin and facing the first magnet;
a first substrate disposed between the base and the housing and comprising a second coil facing the first magnet;
an upper elastic member connecting the housing and the bobbin;
a lateral elastic member connecting the first substrate and the upper elastic member;
a second magnet disposed on the bobbin;
a second substrate having a length extending in an optical axis direction; and
a sensor configured to detect the second magnet and disposed on the second substrate,
wherein the bobbin comprises a recess disposed with the second magnet,
wherein the upper elastic member comprises an inner portion coupled with the bobbin, an outer portion coupled with the housing, and a connection portion connecting the inner portion and the outer portion,
wherein the inner portion comprises a first region overlapped with the second magnet in the optical axis direction,
wherein the second substrate comprises a plurality of upper terminals, and a groove formed between the plurality of upper terminals, and
wherein a portion of the upper elastic member passes through the groove of the second substrate and is connected with the upper terminal of the second substrate.

2. The lens driving device of claim 1 , wherein the first region is a region comprising a distal end of one side of the inner portion, and
wherein the first region is overlapped with at least 90% of an upper surface of the second magnet in the optical axis direction.

3. The lens driving device of claim 1 , wherein the upper elastic member comprises a groove formed on the first region, and
wherein the groove of the upper elastic member is overlapped with the second magnet in the optical axis direction.

4. The lens driving device of claim 1 , comprising a cover coupled with the base,
wherein the cover is overlapped with an entire area of the recess of the bobbin in the optical axis direction.

5. The lens driving device of claim 1 , wherein the first region is overlapped with an entire area of an upper surface of the second magnet.

6. The lens driving device of claim 1 , wherein the first region comprises a portion having a largest width among the inner portion.

7. The lens driving device of claim 1 , wherein the bobbin comprises a groove formed below the first region, and
wherein the groove is connected to the recess of the bobbin.

8. The lens driving device of claim 1 , wherein the first region of the upper elastic member extends from the inner portion of the upper elastic member in a direction opposite to an extending direction of the connection portion of the upper elastic member.

9. The lens driving device of claim 1 , wherein the first region of the upper elastic member covers an upper surface of the second magnet when viewed from above.

10. The lens driving device of claim 1 , wherein, in the optical axis direction, a gap is formed between the first region of the upper elastic member and the second magnet.

11. The lens driving device of claim 1 , wherein the plurality of upper terminals comprises first to fourth terminals,
wherein the third terminal and the fourth terminal are disposed between the first terminal and the second terminal,
wherein the groove comprises a first groove formed between the first terminal and the third terminal, and a second groove formed between the second terminal and the fourth terminal, and
wherein the upper elastic member further comprises a first upper elastic unit passing through the first groove and connected with the third terminal, and a second upper elastic unit passing through the second groove and connected with the fourth terminal.

12. The lens driving device of claim 1 , wherein the inner portion comprises a hole coupled with the bobbin,
wherein the first region is disposed at one side of the hole,
wherein the first region comprises a distal end most distantly disposed from the hole, and
wherein the distal end of the first region is more adjacently disposed to the hole than to the connection portion.

13. The lens driving device of claim 12 , wherein the distal end of the first region is more distantly disposed from the connection portion than from the hole.

14. The lens driving device of claim 12 , wherein the distal end of the first region does not abut the connection portion.

15. The lens driving device of claim 12 , wherein the bobbin comprises a protrusion coupled to the hole, and
wherein the first region is disposed at one side of the protrusion and the distal end of the first region is farthest from the protrusion.

16. The lens driving device of claim 12 , wherein the first region is disposed adjacent to the hole.

17. A camera device, comprising:
a printed circuit board;
an image sensor disposed on the printed circuit board;
the lens driving device of claim 11 ; and
a lens coupled to the bobbin of the lens driving device.

18. An optical apparatus, comprising:
a main body;
the camera device of claim 17 disposed on the main body; and
a display disposed on the main body and outputting an image photographed by the camera device.

19. A lens driving device comprising:
a bobbin;
a first coil disposed on the bobbin;
a first magnet facing the first coil;
an upper elastic member connected to the bobbin;
a second magnet disposed on the bobbin;
a substrate having a length extending in an optical axis direction; and
a sensor configured to detect the second magnet and disposed on the substrate,
wherein the bobbin comprises a recess disposed with the second magnet,
wherein the bobbin is opened at a portion corresponding to an upper surface of the second magnet by the recess of the bobbin,
wherein the upper elastic member comprises an inner portion coupled with the bobbin, an outer portion disposed at an outer lateral of the inner portion, a connection portion connecting the inner portion and the outer portion, and a first region extending from the inner portion and covering the upper surface of the second magnet when viewed from above,
wherein the substrate comprises a plurality of upper terminals, and a groove formed between the plurality of upper terminals, and
wherein a portion of the upper elastic member passes through the groove of the substrate and is connected with the upper terminal of the substrate.

20. A lens driving device comprising:
a base;
a housing spaced apart from the base;
a bobbin disposed in the housing;
a first magnet disposed on the housing;
a first coil disposed on the bobbin and facing the first magnet;
a first substrate disposed between the base and the housing and comprising a second coil facing the first magnet;
an upper elastic member connecting the housing and the bobbin;
a lateral elastic member connecting the first substrate and the upper elastic member;
a second magnet disposed on the bobbin;
a second substrate having a length extending in an optical axis direction; and
a sensor configured to detect the second magnet,
wherein the upper elastic member is disposed on an upper surface of the bobbin,
wherein the bobbin comprises a recess disposed with the second magnet,
wherein the upper surface of the bobbin is opened at a portion corresponding to an upper surface of the second magnet by the recess of the bobbin,
wherein the upper elastic member comprises a first region ov

Assignees

• Lg Innotek Co Ltd

Inventors

• Lee Sung Guk
• Min Sang Jun

Classifications

• G03B2205/0069

  using electromagnetic actuators, e.g. voice coils · CPC title

• G03B2205/0015

  by displacing one or more optical elements normal to the optical axis · CPC title

• G03B13/36

  Autofocus systems · CPC title

• G03B5/04

  Vertical adjustment of lens; Rising fronts · 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