Camera module with isolated focusing and stabilization mechanism

Patent metadata

Field	Value
Publication number	US-10924644-B2
Application number	US-201916258827-A
Country	US
Kind code	B2
Filing date	Jan 28, 2019
Priority date	Jan 31, 2018
Publication date	Feb 16, 2021
Grant date	Feb 16, 2021

Abstract

A camera module is disclosed. The camera module includes first and second housings, respectively including first and second lens groupings and first and second magnets, a third housing including a bottom surface, a wall surface, and first and second coils, a circuit board include an image sensor, the board adjacent to the third housing. The first housing is moveable in a first direction by interaction between the first magnet and first coil for adjusting a focus. The second housing is moveable in a second direction by interaction between the second magnet and second coil for anti-shake compensation.

First claim

What is claimed is:

1. A camera module, comprising:
a first housing including a first lens group and a first magnet;
a second housing including a second lens group spaced apart from the first lens group and a second magnet, the second housing configured to receive at least part of the first housing;
a third housing including a bottom surface including an opening, and a wall surface perpendicular to the bottom surface of the third housing, the third housing configured to receive at least part of the second housing, the third housing further including a first flexible circuit board forming a pair of walls facing each other, first coils formed on a portion of the pair of walls, and second coils formed on two prongs extending from the first flexible circuit board adjacent to the bottom surface of the third housing; and
a second circuit board including an image sensor, the second circuit board disposed adjacent the bottom surface of the third housing,
wherein the first housing is moveable in a first direction responsive to an interaction between the first magnet and the first coils that adjusts a focus of the camera module, and the second housing is moveable in a second direction responsive to an interaction between the second magnet and the second coils that at least partially compensates for shaking of the camera module.

2. The camera module of claim 1 , wherein the first housing moves in the second direction corresponding to a movement of the second housing, and
wherein the second direction is perpendicular to the first direction, and
wherein coils of the second coils are disposed such that axes extending lengthwise through the second coils are orthogonal to one another.

3. The camera module of claim 1 , further comprising a stopper coupled to a surface of the third housing to restrict a movement range of the first housing in the first direction.

4. The camera module of claim 3 , wherein the stopper includes a supporting part coupled with the third housing, and at least one path restricting part extending from the supporting part as to form a step configured to restrict the movement range in the first direction.

5. The camera module of claim 1 , further comprising:
a guide extending in the first direction from a bottom surface of the second housing; and
a plurality of bearings disposed between the guide and the first housing,
wherein when the first lens group moves back and forth in the first direction, the plurality of bearings are configured to roll between the guide and the first housing.

6. The camera module of claim 5 , further comprising a yoke mounted on an outer surface of the guide, and oriented as to face a supporting magnet, the guide interposed between the yoke and the supporting magnet.

7. The camera module of claim 1 , further comprising a position detecting sensor disposed adjacent to the first coils, and configured to detect displacement of the first housing in the first direction.

8. A camera module, comprising:
a first housing including a first lens group and a first magnet;
a second housing including a second lens group spaced apart from the first lens group, a second magnet, and first coils, the second magnet and the first coils mounted on different surfaces respectively, the second housing further configured to receive at least part of the first housing;
a third housing including a bottom surface including an opening, and a wall surface disposed perpendicular to the bottom surface and configured to receive at least part of the second housing, the third housing further including a first flexible circuit board forming a pair of walls facing each other, the first coils formed on a portion of the pair of walls, and second coils formed on two prongs extending from the first flexible circuit board adjacent to the bottom surface; and
a second circuit board including an image sensor and disposed adjacent to the bottom surface,
wherein the first housing is moveable in a first direction responsive to an interaction between the first magnet and the first coils adjusting a focus of the camera module, and the second housing is moveable in a second direction responsive to an interaction between the second magnet and the second coils at least partially compensating for shaking of the camera module.

9. The camera module of claim 8 , wherein the first housing moves in the second direction corresponding to a movement of the second housing,
wherein the second direction is perpendicular to the first direction, and
wherein coils of the second coils are disposed such that axes extending lengthwise through the second coils are orthogonal to one another.

10. The camera module of claim 9 , further comprising a stopper coupled to a surface of the third housing to restrict a movement range of the first housing in the first direction or the second direction.

11. The camera module of claim 10 , wherein the stopper includes:
a supporting part coupled with the third housing; and
a path restricting part extending from the supporting part, and configured to guide a limited movement of a portion of the first housing in the first direction or the second direction.

12. The camera module of claim 8 , further comprising:
a guide extending in the first direction from a bottom surface of the second housing; and
bearings disposed between the guide and the first housing,
wherein when the first lens group moves back and forth in the first direction, the bearings are configured to roll between the guide and the first housing.

13. The camera module of claim 12 , further comprising a yoke mounted on an outer surface of the guide oriented as to face the first magnet with the guide interposed between the yoke and the first magnet.

14. The camera module of claim 8 , wherein the first flexible circuit board at least partially surrounds at least a part of an outer surface of the second housing,
wherein the first flexible circuit board includes a transforming part that is transformable corresponding to a movement of the first housing.

15. The camera module of claim 14 , wherein the first flexible circuit board includes:
a first supporting part coupled to each of two opposite ends of the third housing;
a second supporting part coupled to a side surface of the second housing; and
a transforming part disposed between the first supporting part and the second supporting part, the transforming part transformable according to a movement of the first housing in the first direction, and
wherein the transforming part is formed having a length longer than a distance between the first supporting part and the second supporting part.

16. The camera module of claim 8 , further comprising:
a first position detecting sensor disposed adjacent to the first coils and configured to detect a displacement of the first housing in the first direction; and
a second position detecting sensor disposed adjacent to the second coils and configured to detect a displacement of the second housing in the second direction.

17. A camera module, comprising:
a first housing including a first lens group;
a second housing including a second lens group spaced apart from the first lens group, the second housing configured to receive at least part of the first housing;
a third housing including a first surface including an opening, and a second surface perpendicular to the first surface, the third housing configured to receive at least part of the second housing, the third housing further including a first flexible circuit board forming a pair of walls facing each other;
at least one first magnet disposed on

Assignees

• Samsung Electronics Co Ltd

Inventors

• Hwang Youngjae
• BYON Kwangseok

Classifications

• H04N23/687 Primary

  by shifting the lens or sensor position · CPC title

• H04N23/51 Primary

  Housings · CPC title

• H04N23/57

  Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices · CPC title

• H04N23/67

  Focus control based on electronic image sensor signals · CPC title

• H04N23/55

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