Camera module

Patent metadata

Field	Value
Publication number	US-9955077-B2
Application number	US-201514718200-A
Country	US
Kind code	B2
Filing date	May 21, 2015
Priority date	Jun 20, 2014
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

A camera module includes first and second frames accommodated in housing, and a hand-shake correction unit. The hand-shake correction unit is provided on the first frame or the second frame and configured to generate a driving force in a direction perpendicular to an optical axis of a lens accommodated in the first and second frames. Sidewalls of the housing opposite to each other comprise different thicknesses.

First claim

What is claimed is:

1. A camera module, comprising:
a housing comprising a first sidewall, a second sidewall disposed adjacent to the first sidewall, a third sidewall disposed adjacent to the second sidewall and opposite the first sidewall, and a fourth sidewall disposed adjacent to the third sidewall and opposite the second sidewall;
first and second frames accommodated in the housing; and
a hand-shake correction unit disposed the second frame in the first sidewall and the second sidewall, and configured to generate a driving force in a direction perpendicular to an optical axis of a lens accommodated in the first and second frames,
wherein the first and second sidewalls are thicker than the third and fourth sidewalls.

2. The camera module of claim 1 , wherein the first and second frames are configured to move in a first direction perpendicular to the optical axis, relative to the housing.

3. The camera module of claim 2 , wherein the second frame is configured to move in a second direction perpendicular to both the optical axis and the first direction, relative to the first frame.

4. The camera module of claim 3 , wherein the hand-shake correction unit comprises
a first hand-shake correction unit configured to generate a driving force in the first direction; and
a second hand-shake correction unit configured to generate a driving force in the second direction.

5. The camera module of claim 4 , wherein a magnitude of the driving force generated by the first hand-shake correction unit differs from a magnitude of the driving force generated by the second hand-shake correction unit.

6. The camera module of claim 4 , wherein
the first hand-shake correction unit is provided on one side surface of the second frame, and
the second hand-shake correction unit is provided on another side surface of the second frame, adjacent to the one side surface of the second frame.

7. The camera module of claim 6 , wherein the first and second hand-shake correction units are disposed to be orthogonal with respect to each other on a plane perpendicular to the optical axis.

8. The camera module of claim 6 , wherein the first hand-shake correction unit comprises
a first magnet on the one side surface of the second frame; and
a first coil facing the first magnet.

9. The camera module of claim 8 , wherein
an opening is provided in the second sidewall facing the one side surface of the second frame, and
the first coil is disposed within the opening.

10. The camera module of claim 6 , wherein the second hand-shake correction unit comprises
a second magnet on the another side surface of the second frame adjacent to the one side surface thereof; and
a second coil facing the second magnet.

11. The camera module of claim 10 , wherein
an opening is provided in the second sidewall facing the another side surface of the second frame, and
the second coil is disposed within the opening.

12. The camera module of claim 1 , further comprising a first ball bearing unit disposed between the housing and the first frame, and configured to roll in a first direction perpendicular to the optical axis.

13. The camera module of claim 12 , wherein the housing and the first frame comprise a first accommodating groove accommodating the first ball bearing unit therein.

14. The camera module of claim 13 , wherein the first accommodating groove is configured to guide a rolling motion of the first ball bearing unit in the first direction and to limit movement of the first ball bearing unit in directions perpendicular to the first direction.

15. The camera module of claim 13 , wherein the first accommodating groove is provided in four corners of an inner bottom surface of the housing and four corners of a lower surface of the first frame.

16. The camera module of claim 12 , further comprising
a second ball bearing unit disposed between the first and second frames,
wherein the second ball bearing unit is configured to roll in a second direction perpendicular to both the first direction and the optical axis.

17. The camera module of claim 16 , wherein the first and second frames comprise a second accommodating groove accommodating the second ball bearing unit therein.

18. The camera module of claim 17 , wherein the second accommodating groove is configured to guide a rolling motion of the second ball bearing unit in the second direction and to limit movement of the second ball bearing unit in directions perpendicular to the second direction.

19. The camera module of claim 17 , wherein the second accommodating groove is provided in four corners of an upper surface of the first frame and four corners of a lower surface of the second frame.

20. The camera module of claim 1 , wherein magnetic force acts in an optical axis direction between the housing and the hand-shake correction unit.

21. The camera module of claim 20 , wherein the housing is provided with a yoke part facing the hand-shake correction unit in the optical axis direction.

22. The camera module of claim 21 , wherein magnetic attractive force acts between the hand-shake correction unit and the yoke part.

23. The camera module of claim 21 , wherein the hand-shake correction unit comprises
a first hand-shake correction unit configured to generate a driving force in a first direction perpendicular to the optical axis, and
a second hand-shake correction unit configured to generate a driving force in a second direction perpendicular to the first direction and the optical axis, and
the yoke part comprises
a first yoke facing the first hand-shake correction unit in an optical axis direction, and
a second yoke facing the second hand-shake correction unit in the optical axis direction.

24. A camera module comprising:
a housing comprising first, second, third, and fourth sidewalls;
first and second frames disposed within the housing in an optical axis direction; and
a hand-shake correction unit disposed on the first frame or the second frame and configured to generate a driving force in directions perpendicular to the optical axis direction,
wherein the first and second sidewalls are disposed opposite the third and fourth sidewalls, respectively,
wherein centers of the first and second frames are biased to a position offset from a center of the housing by the first and second sidewalls being thicker than the third and fourth sidewalls, and
wherein the first and second frames are configured to limit movement of the first and second frames in the optical axis direction and to limit rotation thereof on an optical axis.

25. The camera module of claim 24 , further comprising a first ball bearing unit disposed between the housing and the first frame, wherein the first ball bearing unit is configured to roll in a first direction perpendicular to the optical axis direction.

26. The camera module of claim 25 , wherein the housing and the first frame comprise a first accommodating groove accommodating the first ball bearing unit therein.

27. The camera module of claim 26 , wherein
the first ball bearing unit accommodated in the first accommodating groove is configured such that movement thereof is limited in a second direction perpendicular to the optical axis direction and the first direction, and
the first accommodating groove is longer in the first direction than in the second direction.

28. The camera module of claim 25 ,

Assignees

• Samsung Electro Mech

Inventors

• Lim Soo Cheol
• Park Sung Ryung
• Kim Chul Jin
• Kim Jae Hyuk
• Kwon Oh Byoung
• Kang Byung Woo

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

• H04N23/57

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

• H04N23/60

  Control of cameras or camera modules · CPC title

• H04N23/687 Primary

  by shifting the lens or sensor position · CPC title

• H04N23/55

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