Lens Moving Apparatus

• US 20160109721A1
• Filed: 10/19/2015
• Published: 04/21/2016
• Est. Priority Date: 10/17/2014
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Min, Sang Jun, Yoo, Hyune O, Yoo, Kyoung Ho
• Granted Patent: US 10,095,047 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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: H04N 23/51 Housings
• CPC Class Codes: H04N 23/55 Optical parts specially adapted for electronic image sensors; Mounting thereof

Abstract

A lens moving apparatus includes a bobbin including a first coil, a first magnet facing the first coil, a housing supporting the first magnet, upper and lower elastic members coupled to the bobbin and the housing, a base spaced apart from the housing, a second coil unit, which faces the first magnet and includes a second coil, a circuit board on which the second coil unit is mounted, a plurality of support members, which support the housing such that the housing is movable in second and/or third directions and which connect at least one of the upper and lower elastic members to the circuit board, and a second sensor detecting displacement of the housing in the second and/or third directions, wherein the center of the second sensor is disposed so as not to overlap the second coil.

Claims

1. A lens moving apparatus comprising:

a bobbin including a first coil disposed therearound and moving in a first direction;

a first magnet disposed to face the first coil;

a housing for supporting the first magnet;

upper and lower elastic members coupled to the bobbin and the housing;

a base disposed to be spaced apart from the housing by a predetermined distance;

a second coil unit, which is disposed to face the first magnet and includes a second coil;

a circuit board on which the second coil unit is mounted;

a plurality of support members, which support the housing such that the housing is movable in second and/or third directions and which connect at least one of the upper and lower elastic members to the circuit board; and

a second sensor for detecting displacement of the housing in the second and/or third directions,

wherein the center of the second sensor is disposed so as not to overlap the second coil when viewed in the first direction.

2. The lens moving apparatus according to claim 1, wherein the second coil unit is configured to have a rectangular plate shape, and the second coil is disposed close to and parallel to a side of the second coil unit in a longitudinal direction thereof.

3. The lens moving apparatus according to claim 2, wherein the second coil includes a plurality of second coils, at least one of which is disposed close to the second sensor.

4. The lens moving apparatus according to claim 3, wherein, when the second coil is disposed so as not to be close to the second sensor, the second coil has a length equal to or longer than that of the first magnet.

5. The lens moving apparatus according to claim 3, wherein, when the second coil is disposed close to the second sensor, the second coil has a length equal to or shorter than that of the first magnet.

6. The lens moving apparatus according to claim 1, wherein the second sensor is disposed such that the center of the second sensor is not positioned outside an end of the first magnet but overlaps the first magnet.

7. The lens moving apparatus according to claim 1, wherein the second coil has a width, which is measured in the second or third direction, exceeding a sum of a width of the first magnet in the second or third direction and a movable distance of the housing in the second or third direction.

8. The lens moving apparatus according to claim 1, further comprising a first sensor for detecting displacement in the first direction of the bobbin,

wherein the upper elastic member includes at least four first to fourth upper elastic members, which are separated from one another,

wherein the first sensor is connected to the plurality of support members via the first to fourth upper elastic members.

9. The lens moving apparatus according to claim 8, wherein the lower elastic member includes at least two first and second lower elastic members, which are separated from each other.

10. The lens moving apparatus according to claim 9,

wherein the first coil is connected to the plurality of support members via the first and second lower elastic members.

11. The lens moving apparatus according to claim 10, wherein the at least four upper elastic members further comprise fifth and sixth upper elastic members, which are separated from each other.

12. The lens moving apparatus according to claim 11, wherein each of the fifth and sixth upper elastic members is formed in the direction perpendicular to the first direction and is coupled to the housing and the support members.

13. The lens moving apparatus according to claim 8, wherein the first sensor is disposed, coupled or mounted on the bobbin so as to move therewith.

14. The lens moving apparatus according to claim 13, further comprising a sensor substrate coupled to the bobbin,

wherein the first sensor has a shape capable of being disposed, coupled or mounted on the sensor substrate.

15. The lens moving apparatus according to claim 1, further comprising:

a first sensor for detecting displacement of the bobbin in the first direction; and

a second magnet disposed to face the first sensor,

wherein the first and second magnets are integrally formed.

16. The lens moving apparatus according to claim 15, wherein the first sensor and the first magnet are disposed to face each other such that an imaginary horizontal center line, which extends through a center of the first sensor and intersects an optical axis, coincides with an upper end of the first magnet.

17. The lens moving apparatus according to claim 16, wherein the bobbin moves upward and downward with respect to a point at which the imaginary horizontal center line coincides with the upper end of the first magnet.

18. The lens moving apparatus according to claim 1, further comprising:

a first sensor for detecting displacement of the bobbin in the first direction; and

a second magnet disposed to face the first sensor,

wherein the first and second magnets are independently formed.

19. The lens moving apparatus according to claim 1, wherein the plurality of support members are symmetrical in shape and number with respect to the second and third directions.

20. The lens moving apparatus according to claim 19, wherein the lower elastic member includes at least four first to fourth lower elastic members, which are separated from one another,

wherein the first sensor is connected to the plurality of support members via the first to fourth lower elastic members.