Camera lens module

• US 9,804,408 B2
• Filed: 09/23/2015
• Issued: 10/31/2017
• Est. Priority Date: 09/23/2014
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Rho, Hyung-Jin, Kim, Se-Won, Yu, Young-Bok, Yu, Dong-Hun
• Primary Examiner(s): Flohre, Jason
• Application Number:
  US14/863,074
• Publication Number:
  US 20160085086A1
• Time in Patent Office: 769 Days
• CPC Class Codes: G02B 13/001 Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras G02B23/243 takes precedence
• CPC Class Codes: G02B 27/646 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 Class Codes: G02B 7/08 adapted to co-operate with a remote control mechanism
• CPC Class Codes: G02B 7/09 adapted for automatic focusing or varying magnification
• CPC Class Codes: H04N 23/68 for stable pick-up of the scene, e.g. compensating for camera body vibrations
• CPC Class Codes: H04N 23/682 Vibration or motion blur correction

Abstract

A camera lens module includes a lens unit, an automatic focus actuator including a first flexible circuit board. The first flexible circuit board has a plurality of first coil windings and a first Hall sensor. The plurality of first coil windings actuates the lens unit along an optical axis. An image stabilization actuator includes an image stabilization carrier having a plurality of magnets facing the first coil windings and a second flexible circuit board having a plurality of second coil windings facing respective lower surfaces of the magnets and a second Hall sensor. The camera lens module includes a base coupled with the image stabilization actuator under the image stabilization actuator, and a plurality of rollers disposed on the base and configured to rollably move the image stabilization actuator.

Claims

1. A camera lens module, comprising:

a lens unit;

an automatic focus actuator including a first flexible circuit board, the first flexible circuit board having a plurality of first coil windings and a first Hall sensor, the plurality of first coil windings actuating the lens unit along an optical axis;

an image stabilization actuator including an image stabilization carrier having a plurality of magnets facing the plurality of first coil windings and a second flexible circuit board having a plurality of second coil windings facing respective lower surfaces of the plurality of magnets and a second Hall sensor;

a base coupled with the image stabilization actuator and disposed beneath the image stabilization actuator; and

a plurality of rollers disposed on the base and configured to rollably move the image stabilization actuator.

2. The camera lens module of claim 1, wherein the plurality of second coil windings are disposed on an upper surface of the second flexible circuit board, and wherein a plurality of yokes are disposed on a lower surface of the second flexible circuit board, the plurality of yokes respectively corresponding to the plurality of magnets, and the plurality of yokes configured to float and center the image stabilization carrier over the base.

3. The camera lens module of claim 1, wherein each of the plurality of rollers includes a ball bearing configured to rollably move the image stabilization actuator in a direction substantially perpendicular to the optical axis.

4. A camera lens module, comprising:

a lens carrier;

a lens unit disposed inside the lens carrier;

a first flexible circuit board surrounding an outer surface of the lens carrier, the first flexible circuit board having a plurality of first coil windings and a first Hall sensor;

an image stabilization carrier having a plurality of magnets facing the plurality of first coil windings, the lens carrier disposed inside the image stabilization carrier;

a second flexible circuit board disposed beneath the image stabilization carrier, the second flexible circuit board including a plurality of second coil windings respectively facing respective lower surfaces of the magnets and a second Hall sensor; and

a base coupled with the second flexible circuit board and the image stabilization carrier beneath the image stabilization carrier, at least one roller disposed on the base and configured to support the image stabilization carrier.

5. The camera lens module of claim 4, wherein an automatic focus actuator is disposed between the lens carrier and the image stabilization carrier and configured to move the lens carrier along an optical axis.

6. The camera lens module of claim 5,

wherein the automatic focus actuator comprises:

the lens unit disposed inside the lens carrier;

the first flexible circuit board adapted to surround the outer surface of the lens carrier, having the first Hall sensor configured to apply a current to the plurality of first coil windings, and configured to detect a moved position of the plurality of magnets;

the plurality of first coil windings and the first Hall sensor disposed on a side surface of the first flexible circuit board and respectively facing the magnets; and

a first restoration member and a second restoration member respectively disposed on an upper portion and a lower portion of the first flexible circuit board, electrically connected with the first flexible circuit board, and configured to provide an elastic force that moves the lens carrier along the optical axis.

7. The camera lens module of claim 4, wherein an image stabilization actuator is disposed between the image stabilization carrier and the base to compensate for shaking of the lens carrier.

8. The camera lens module of claim 7, wherein the image stabilization actuator comprises:

the plurality of magnets respectively disposed at corners of the image stabilization carrier; and

the second flexible circuit board coupled with the base over the base and having the second Hall sensor and configured to apply a current to the second coil windings respectively disposed at corners of the second flexible circuit board on an upper surface of the second flexible circuit board and detecting a moved position of the magnets;

the plurality of second coil windings and the second Hall sensor respectively disposed at the corners of the second flexible circuit board, facing the plurality of magnets, respectively; and

the at least one roller disposed on an upper surface of the base configured to rollably move the image stabilization carrier in a direction substantially perpendicular to a optical axis.

9. The camera lens module of claim 8, wherein the at least one roller includes a ball bearing.

10. The camera lens module of claim 4, wherein a plurality of yokes are disposed on a lower surface of the second flexible circuit board to be spaced apart from the plurality of magnets, respectively, the plurality of yokes configured to float and center the image stabilization carrier over the base.

11. The camera lens module of claim 6, wherein a plurality of wires are disposed between the first restoration member and the second restoration member to electrically connect the first flexible circuit board with the second flexible circuit board.

12. The camera lens module of claim 4, wherein a cover is coupled with the base over the base, the cover having a stopper to restrict a movement of the lens carrier along an optical axis.

13. The camera lens module of claim 4, wherein a support plate is disposed under the image stabilization carrier to fasten and support the plurality of magnets.

14. A portable device comprising:

a processor;

a display coupled to the processor; and

a camera lens module coupled to the processor, the camera lens module comprising;

a lens carrier;

a lens unit disposed inside the lens carrier;

a first flexible circuit board surrounding an outer surface of the lens carrier, the first flexible circuit board having a plurality of first coil windings and a first Hall sensor;

an image stabilization carrier having a plurality of magnets facing the plurality of first coil windings, the lens carrier disposed inside the image stabilization carrier;

a second flexible circuit board disposed beneath the image stabilization carrier, the second flexible circuit board including a plurality of second coil windings respectively facing respective lower surfaces of the magnets and a second Hall sensor; and

a base coupled with the second flexible circuit board and the image stabilization carrier beneath the image stabilization carrier, at least one roller disposed on the base and configured to support the image stabilization carrier.

15. The portable device of claim 14, wherein an automatic focus actuator is disposed between the lens carrier and the image stabilization carrier and configured to move the lens carrier along an optical axis.

16. The portable device of claim 15,

wherein the automatic focus actuator comprises:

the lens unit disposed inside the lens carrier;

the first flexible circuit board adapted to surround the outer surface of the lens carrier, having the first Hall sensor configured to apply a current to the plurality of first coil windings, and configured to detect a moved position of the plurality of magnets;

the plurality of first coil windings and the first Hall sensor disposed on a side surface of the first flexible circuit board and respectively facing the magnets; and

a first restoration member and a second restoration member respectively disposed on an upper portion and a lower portion of the first flexible circuit board, electrically connected with the first flexible circuit board, and configured to provide an elastic force that moves the lens carrier along the optical axis.

17. The portable device of claim 14, wherein an image stabilization actuator is disposed between the image stabilization carrier and the base to compensate for shaking of the lens carrier.

18. The portable device of claim 17, wherein the image stabilization actuator comprises:

the plurality of magnets respectively disposed at corners of the image stabilization carrier; and

the second flexible circuit board coupled with the base over the base and having the second Hall sensor and configured to apply a current the second coil windings respectively disposed at corners of the second flexible circuit board on an upper surface of the second flexible circuit board and detecting a moved position of the magnets;

the plurality of second coil windings and the second Hall sensor respectively disposed at the corners of the second flexible circuit board, facing the plurality of magnets, respectively; and

the at least one roller disposed on an upper surface of the base configured to rollably move the image stabilization carrier in a direction substantially perpendicular to an optical axis.

19. The portable device of claim 18, wherein the at least one roller includes a ball bearing.

20. The portable device of claim 14, wherein a plurality of yokes are disposed on a lower surface of the second flexible circuit board to be spaced apart from the plurality of magnets, respectively, the plurality of yokes configured to float and center the image stabilization carrier over the base.

21. The portable device of claim 16, wherein a plurality of wires are disposed between the first restoration member and the second restoration member to electrically connect the first flexible circuit board with the second flexible circuit board.

22. The portable device of claim 14, wherein a cover is coupled with the base over the base, the cover having a stopper to restrict a movement of the lens carrier along an optical axis.

23. The portable device of claim 14, wherein a support plate is disposed under the image stabilization carrier to fasten and support the plurality of magnets.