Lens driving device, camera module and optical apparatus

Patent metadata

Field	Value
Publication number	US-11215841-B2
Application number	US-201815967158-A
Country	US
Kind code	B2
Filing date	Apr 30, 2018
Priority date	Jan 28, 2015
Publication date	Jan 4, 2022
Grant date	Jan 4, 2022

Abstract

A lens driving device including a first lens driving unit for auto focusing, and a second lens driving unit for handshake correction is proposed, the lens driving device including a base, a holder member mounted with a magnet and positioned at an upper side of the base by being spaced apart from the base at a predetermined distance, a plurality of support members configured to elastically support the holder member relative to the base, an upper stopper protrusively formed at an upper surface of the holder member, and a bottom stopper protrusively formed at a bottom surface of the holder member to form a shock point between the base and the holder member when there is generated a shock.

First claim

What is claimed is:

1. A lens driving device, comprising:
a holder member;
a bobbin disposed in the holder member and comprising a hole;
a first coil disposed on the bobbin;
a magnet disposed on the holder member and facing the first coil;
a base disposed under the holder member;
a first circuit board disposed on an upper surface of the base;
a second circuit board disposed on an upper surface of the first circuit board and comprising a second coil facing the magnet;
a sensor coupled to a lower surface of the first circuit board and configured to detect the magnet; and
an adhesive adhering the first circuit board to the base,
wherein the first circuit board comprises a body part disposed between the upper surface of the base and the second circuit board and a terminal part extending from an outer periphery of the body part,
wherein the body part of the first circuit board comprises a first hole formed at a position corresponding to that of the hole of the bobbin and a first terminal disposed on an inner periphery of the first hole of the first circuit board,
wherein the terminal part of the first circuit board is disposed on an outer periphery of the base and comprises a second terminal,
wherein the first terminal of the first circuit board is coupled to the second circuit board by a solder,
wherein the second circuit board comprises a first hole formed at a position corresponding to that of the first hole of the first circuit board and a groove formed on an inner periphery of the first hole of the second circuit board,
wherein a radius of curvature of the groove of the second circuit board is different from a radius of curvature of the inner periphery of the first hole of the second circuit board,
wherein each of the first circuit board and the second circuit board comprises a second hole,
wherein the base comprises a hole formed at a position corresponding to that of the first hole of the first circuit board, a first recess part accommodating at least a portion of the adhesive, and a second recess part recessed from the upper surface of the base,
wherein the first recess part is disposed at a position corresponding to that of the first terminal of the first circuit board and the solder,
wherein the first recess part of the base is spaced apart from the outer periphery of the base,
wherein the sensor is disposed on the second recess part of the base,
wherein the second recess part is disposed between the first recess part and the outer periphery of the base.

2. The lens driving device of claim 1 , wherein the first recess part comprises a hole.

3. The lens driving device of claim 1 , wherein the first circuit board comprises a groove formed on the inner periphery of the first hole of the first circuit board, and
wherein the adhesive attaches a lower surface of the first circuit board to the base.

4. The lens driving device of claim 1 , wherein the holder member comprises an upper surface and a lower surface that is opposite to the upper surface in a vertical direction perpendicular to the upper surface of the base,
wherein the upper surface of the holder member comprises four corners and four lateral sides respectively between the corners, wherein the lower surface of the holder member comprises four corners and four lateral sides respectively between the corners, and wherein the four corners and the four lateral sides of the lower surface of the holder member are aligned in the vertical direction with the four corners and the four corners and the four lateral sides, respectively, of the upper surface of the holder member,
wherein the holder member comprises four bottom stoppers protruding in the vertical direction from the four corners, respectively, of the lower surface of the holder member,
wherein the holder member comprises at least one upper stopper protruding in the vertical direction from the upper surface of the holder member, each upper stopper of the at least one upper stopper respectively protruding from a lateral side of the four lateral sides of the upper surface of the holder member, and
wherein each of the four bottom stoppers is not overlapped in the vertical direction with the at least one upper stopper.

5. The lens driving device of claim 1 ,
wherein at least a portion of the first recess part is formed at a position not interfering with the second coil.

6. The lens driving device of claim 1 , wherein the first recess part of the base is spaced apart from the second recess part of the base.

7. The lens driving device of claim 1 ,
wherein the first recess part of the base comprises four first recess parts, and
wherein the four first recess parts are disposed between the hole of the base and four corners of the base, respectively.

8. The lens driving device of claim 1 ,
wherein the first recess part of the base is spaced apart from the inner periphery of the base.

9. The lens driving device of claim 1 , wherein the base comprises a groove formed on the outer periphery of the base,
wherein the terminal part extends along the groove of the base.

10. The lens driving device of claim 1 , wherein the second circuit board comprises a flexible printed circuit board, and
wherein the second coil is formed as a pattern coil on the flexible printed circuit board.

11. The lens driving device of claim 1 , wherein the base comprises a protrusion protruding from the upper surface of the base, and
wherein the protrusion of the base is inserted to the second hole of both the first circuit board and the second circuit board.

12. The lens driving device of claim 1 , wherein the groove of the second circuit board is spaced apart from the second hole of the second circuit board.

13. The lens driving device of claim 12 , wherein the second recess part is nearer to one corner of the base than to an other corner of the base.

14. The lens driving device of claim 1 , comprising:
an upper elastic member coupled to an upper portion of the bobbin and an upper portion of the holder member; and
a lower elastic member coupled to a lower portion of the bobbin and a lower portion of the holder member.

15. The lens driving device of claim 14 , comprising:
a wire coupled to the upper elastic member and the first circuit board.

16. The lens driving device of claim 15 , wherein the first circuit board comprises a third hole, and
wherein the wire passes through the third hole of first circuit board and is coupled to a lower surface of the first circuit board by soldering.

17. A camera module, comprising:
a PCB(Printed Circuit Board);
an image sensor disposed on the PCB;
the lens driving device of claim 1 disposed at the PCB; and
a lens coupled to the bobbin of the lens driving device.

18. An optical apparatus, comprising the camera module of claim 17 .

19. A lens driving device, comprising:
a holder member;
a bobbin disposed in the holder member;
a first coil disposed on the bobbin;
a magnet disposed on the holder member and facing the first coil;
a base disposed under the holder member;
a first circuit board disposed on an upper surface of the base;
a second circuit board disposed on an upper surface of the first circuit board and comprising a second coil facing the magnet;
a sensor coupled to a lower surface of the first circuit board and configured to detect the magnet; and
an adhesive adhering the first circuit board to the base,
wherein the first circuit board comprises a body part disposed between the upper surface of the base and the second circuit board and a termi

Assignees

• Lg Innotek Co Ltd

Inventors

• Park Sang Ok
• Min Sang Jun
• Yoo Kyoung Ho

Classifications

• H04N23/55

  Optical parts specially adapted for electronic image sensors; Mounting thereof · CPC title

• G03B13/36

  Autofocus systems · CPC title

• G02B7/023

  permitting adjustment · CPC title

• 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

• G02B7/02

  for lenses {(supports for magnifying lenses G02B25/002)} · CPC title