Lens driving apparatus and camera module including function of shaking compensation

Patent metadata

Field	Value
Publication number	US-9860432-B2
Application number	US-201314411788-A
Country	US
Kind code	B2
Filing date	Jun 28, 2013
Priority date	Jun 29, 2012
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

Disclosed is a camera module. The camera module includes: a lens barrel disposed in a housing to receive a lens assembly; an elastic member in at least one of the housing and the lens barrel; a driving unit moving the lens barrel relative to the housing; and a sensor unit fixed to the housing.

First claim

The invention claimed is:

1. A lens driving apparatus comprising:
a housing comprising a first housing and a second housing disposed under the first housing, wherein the first housing comprises an upper wall and a side wall extending in a vertical direction from the upper wall;
a barrel disposed in the first housing;
a first elastic member connecting the barrel and the first housing such that the barrel moves relative to the first housing in the vertical direction;
a first coil disposed on an outer side of the barrel;
a magnet disposed on an inner surface of the side wall of the first housing and interacting with the first coil to move the barrel and the first coil relative to the first housing in the vertical direction; and
a second coil interacting with the magnet to move the first housing and the magnet such that the barrel moves relative to the second housing in a horizontal direction;
wherein the magnet comprises a lower surface, an upper surface, and side surfaces;
wherein the side surfaces of the magnet comprise a first side surface facing the first coil and a second side surface opposite to the first side surface,
wherein the upper surface of the magnet is overlapped with the upper wall of the first housing in the vertical direction,
wherein the first coil is facing the first side surface of the magnet in the horizontal direction, and
the second coil is facing the lower surface of the magnet in the vertical direction such that the first coil and the second coil share the magnet;
wherein the first side surface of the magnet meets both the lower surface of the magnet and the upper surface of the magnet,
wherein the second coil is disposed between the magnet and the second housing in the vertical direction and is disposed lower than a bottom surface of the barrel,
wherein in the vertical direction a width of the first side surface of the magnet is greater than a width of an area of the first coil facing the first side surface of the magnet, and
wherein in the horizontal direction a width between the first side surface of the magnet and the second side surface of the magnet is smaller than a width of an area of the second coil facing the lower surface of the magnet.

2. The lens driving apparatus according to claim 1 ,
wherein the magnet has a shape of a plate,
wherein the first coil is fixed to the outer side of the barrel,
wherein the second housing supports the second coil, and
wherein the second coil is overlapped with the magnet in the vertical direction.

3. The lens driving apparatus according to claim 1 , wherein the first coil and the magnet are used to perform focusing function such that the barrel and the first coil move relative to the upper wall of the first housing in the vertical direction under operation of the focusing function,
wherein the magnet and the second coil are used to perform a shaking compensation function such that the first housing and the magnet move relative to the second housing in the horizontal direction under operation of the shaking compensation function,
wherein the second side surface of the magnet is coupled to the inner surface of the side wall of the first housing, and
wherein the magnet and the first coil are disposed below the upper wall of the first housing.

4. The lens driving apparatus according to claim 1 , wherein the second coil is fixed at the second housing.

5. The lens driving apparatus according to claim 1 , further comprising a second elastic member coupled to the first housing and coupled to the second housing.

6. The lens driving apparatus according to claim 1 , wherein the second housing comprises an opening arranged under the barrel in the vertical direction in such a manner that light from a subject passes through the barrel and through the opening of the second housing,
wherein the magnet faces and is exposed to the second coil in the vertical direction, and
wherein the first side surface of the magnet is perpendicular to the lower surface of the magnet.

7. The lens driving apparatus according to claim 1 , wherein the first coil is spaced apart from the magnet by a distance in a range of from 50 μm to 1000 μm in the horizontal direction, and
wherein the second coil is spaced apart from the magnet by a distance in a range of from 50 μm to 1000 μm in the vertical direction.

8. The lens driving apparatus according to claim 1 , wherein the area of the first coil facing the first side surface of the magnet is configured to be positioned between the upper surface of the magnet and the lower surface of the magnet when viewed from the horizontal direction.

9. The lens driving apparatus according to claim 1 , wherein the lower surface of the magnet is configured to be positioned between both ends of the area of the second coil facing the lower surface of the magnet when viewed from the vertical direction.

10. The lens driving apparatus according to claim 1 , wherein the first coil is positioned nearer to the lower surface of the magnet than to the upper surface of the magnet, at an initial position of the barrel.

11. The lens driving apparatus according to claim 1 , wherein the second coil comprises a first portion facing and overlapped with the side wall of the first housing in the vertical direction, a second portion facing and overlapped with the lower surface of the magnet in the vertical direction, and a third portion overlapped with the upper wall of the first housing and not overlapped with the magnet in the vertical direction.

12. The lens driving apparatus according to claim 1 , wherein at least a portion of the second coil is facing the first housing and is overlapped with the first housing in the vertical direction.

13. A lens driving apparatus comprising:
a housing comprising a first housing and a second housing under the first housing, wherein the first housing comprises an upper surface and a side surface extending in a vertical direction from the upper surface;
a barrel disposed in the housing;
a first elastic member fixed to the barrel and the first housing such that the barrel moves relative to the first housing in the vertical direction;
a first driving unit for moving the barrel relative to the housing; and
a second driving unit for moving the first housing relative to the second housing;
wherein the first driving unit comprises a first coil and a magnet and the second driving unit comprises a second coil and the magnet;
wherein the magnet comprises a lower surface, an upper surface, and side surfaces;
wherein the side surfaces of the magnet comprise a first side surface facing the first coil and a second side surface opposite to the first side surface;
wherein the upper surface of the magnet is overlapped with the upper surface of the first housing in the vertical direction,
wherein the first coil is facing the first side surface of the magnet in a horizontal direction, and
the second coil is facing the lower surface of the magnet in the vertical direction such that the first coil and the second coil share the magnet;
wherein the first side surface of the magnet meets both the lower surface of the magnet and the upper surface of the magnet;
wherein the second coil is disposed between the magnet and the second housing in the vertical direction and is disposed lower than a bottom surface of the barrel;
wherein in the vertical direction a width of the first side surface of the magnet is greater than a width of an area of the first coil facing the first side surface of the magnet, and
wherein in the horizontal direction a width between the first side surface of the magnet and the second side surface of the magnet is smaller than a width

Assignees

• Lg Innotek Co Ltd

Inventors

• Yeo In Jae

Classifications

• H04N23/55

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

• H04N23/57

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

• H04N23/687

  by shifting the lens or sensor position · CPC title

• G03B2205/0046

  Movement of one or more optical elements for zooming · CPC title

• G03B2205/0007

  Movement of one or more optical elements for control of motion blur · CPC title