Lens moving apparatus and camera module including the same

Patent metadata

Field	Value
Publication number	US-12510726-B2
Application number	US-202418633724-A
Country	US
Kind code	B2
Filing date	Apr 12, 2024
Priority date	Aug 7, 2014
Publication date	Dec 30, 2025
Grant date	Dec 30, 2025

Abstract

A lens moving apparatus is disclosed. The lens moving apparatus includes a bobbin equipped with at least one lens, a coil and a driving magnet arranged opposite to each other for moving the bobbin in an optical axis direction of the lens through interaction therebetween, a first circuit board for supplying electric current required by the coil, and a cover can and a base coupled to, contacted to, supported at, fixed to, or temporarily fixed to each other for forming a space in which the bobbin, the driving magnet, and the first circuit board are received, wherein the cover can is connected to a second circuit board having an image sensor mounted thereon.

First claim

The invention claimed is:

1 . A camera module, comprising:
a second circuit board comprising a ground; an image sensor disposed on the second circuit board; a cover can electrically connected to the second circuit board and comprising a first side plate and a second side plate opposite to the first side plate, and a third side plate between the first side plate and the second side plate; a base including an opening formed around a center thereof corresponding to a position of the image sensor and coupled with the cover can; a bobbin disposed in the cover can; at least one lens coupled with the bobbin; an upper elastic member coupled with an upper surface of the bobbin; a coil disposed on an outer surface of the bobbin; a first driving magnet and a second driving magnet facing the first side plate and the second side plate of the cover can, respectively, wherein the coil and the first and second driving magnets are configured to move the bobbin in an optical axis direction of the at least one lens through interaction therebetween; a first circuit board facing the third side plate of the cover can and configured to supply electric current to the coil, and a displacement sensing unit disposed on the first circuit board, wherein the third side plate of the cover can is electrically connected to the ground of the second circuit board, and wherein the first circuit board is disposed between the third side plate of the cover can and the bobbin.

2 . The camera module according to claim 1 , comprising a housing disposed in the cover can.

3 . The camera module according to claim 1 ,
wherein the third side plate of the cover can comprises an area configured to be electrically connected to the ground of the second circuit board.

4 . The camera module according to claim 3 , wherein the area is a protruding portion formed from a lower surface of the third side plate of the cover can.

5 . The camera module according to claim 1 , wherein the cover can comprises an upper plate,
wherein the first side plate, the second side plate, and the third side plate extend from the upper plate, wherein a recess is formed at the third side plate of the cover can, wherein the third side plate of the cover can comprises an area configured to be electrically connected to the ground of the second circuit board, and wherein the area of the cover can is disposed at a position closer to the base than to the upper plate of the cover can.

6 . The camera module according to claim 5 , wherein the first circuit board comprises a terminal connected to the second circuit board, and
wherein the terminal of the first circuit board is disposed on a terminal surface of the first circuit board.

7 . The camera module according to claim 1 ,
wherein the cover can comprises an upper plate, wherein the first side plate, the second side plate, and the third side plate extend from the upper plate, wherein the first circuit board comprises a plurality of terminals, and wherein the plurality of terminals of the first circuit board comprise a shielding terminal.

8 . The camera module according to claim 7 , comprising a lower elastic member coupled with a lower surface of the bobbin.

9 . An optical device, comprising the camera module of claim 1 .

10 . A lens moving apparatus, comprising:
a cover can comprising four side plates; a base coupled with the four side plates of the cover can; a bobbin equipped with at least one lens and disposed in the cover can; an upper elastic member coupled with an upper surface of the bobbin; a lower elastic member coupled with a lower surface of the bobbin; a coil disposed on an outer surface of the bobbin; a driving magnet disposed opposite to the coil and configured to move the bobbin in an optical axis direction of the at least one lens; a first circuit board configured to supply electric current to the coil; and a displacement sensing unit disposed on the first circuit board; wherein one side plate of the four side plates of the cover can comprises an area configured to be electrically connected to a ground so that the cover can is grounded, and wherein the first circuit board is disposed between the one side plate of the cover can and the bobbin.

11 . The lens moving apparatus according to claim 10 , wherein at least a portion of the first circuit board is disposed at a side surface of the base.

12 . The lens moving apparatus according to claim 10 , wherein the displacement sensing unit is configured to sense a displacement of the bobbin in the optical axis direction.

13 . The lens moving apparatus according to claim 10 , wherein the first circuit board comprises a shielding terminal electrically connected to the ground.

14 . The lens moving apparatus according to claim 10 , comprising a lower elastic member coupled with a lower surface of the bobbin.

15 . The lens moving apparatus according to claim 10 , comprising a sensing magnet coupled with the bobbin and disposed at a position corresponding to the displacement sensing unit,
wherein the displacement sensing unit is disposed between the first circuit board and the sensing magnet, and wherein the first circuit board comprises a power terminal configured to supply power, and a I2C communication terminal configured to receive a signal.

16 . The lens moving apparatus according to claim 15 , comprising a weight balance member,
wherein the bobbin comprises a receiving recess inwardly formed from the outer surface of the bobbin, and wherein the weight balance member is disposed in the receiving recess.

17 . A camera module, comprising:
a second circuit board; an image sensor disposed on the second circuit board; a bobbin; at least one lens coupled with the bobbin; a first coil and a driving magnet disposed opposite to each other to move the bobbin in an optical axis direction through interaction therebetween; a first circuit board configured to supply electric current to the coil; a cover can and a base coupled to, contacted to, supported at, fixed to, or temporarily fixed to each other to form a space in which the bobbin, the driving magnet, and the first circuit board are accommodated, the cover can being electrically connected to the second circuit board; a position sensing unit sensing a position of the bobbin in the optical axis direction of the at least one lens and outputting position information of the bobbin; and a focus controller configured to control interaction between the first coil and the driving magnet based on subject information and the position information to move the bobbin in the optical axis direction, wherein the focus controller comprises: an information receiving unit receiving the subject information; and a bobbin position retrieval unit configured to retrieve the position of the bobbin having a focus corresponding to the received subject information, and wherein the subject information includes at least one selected from among a distance between a subject and the at least one lens, a position of the subject, and a phase of the subject.

Assignees

• Lg Innotek Co Ltd

Inventors

• Park Sang Ok
• Lee Seong Min
• Lee Jun Taek

Classifications

• H05K9/0058

  specially adapted for optoelectronic applications · CPC title

• G02B7/102

  controlled by a microcomputer (cameras with interchangeable lenses G03B17/14) · CPC title

• G02B7/08 Primary

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

• G02B7/09 Primary

  adapted for automatic focusing or varying magnification · CPC title