Lens driving apparatus and camera module including function of shaking compensation

Patent metadata

Field	Value
Publication number	US-9467624-B2
Application number	US-201314415764-A
Country	US
Kind code	B2
Filing date	Jul 5, 2013
Priority date	Jul 20, 2012
Publication date	Oct 11, 2016
Grant date	Oct 11, 2016

Abstract

Disclosed is a camera module. The camera module includes a lens barrel disposed in a housing to receive a lens; and a driving unit moving the lens barrel relative to the housing, wherein the driving unit comprises: a first driving unit in the lens barrel; and a second driving unit in the housing, and wherein the lens barrel comprises a central area on which the lens is disposed; and a peripheral area surrounding the central area, in which the first driving unit is disposed in the peripheral area. The camera module includes a lens barrel disposed in a housing to receive a lens; and a plurality of driving units moving the lens barrel relative to the housing, wherein a first direction is defined perpendicularly to an optical axis of the lens, a second direction is defined perpendicularly to the optical axis of the lens and the first direction, and the driving units including coils and moving the lens barrels in the same direction along the first direction or the second direction have coil winding directions corresponding to each other.

First claim

The invention claimed is:

1. A lens driving apparatus comprising:
a housing;
a lens barrel provided in the housing;
a first driving module provided around a central axis of the lens barrel and in the housing, the first driving module including a magnet and a first coil;
a second driving module provided in the housing and including the magnet and a second coil, the second coil provided at a lower end of the lens barrel that is perpendicular to the central axis of the lens barrel;
an elastic member connecting the housing and the lens barrel,
wherein the magnet and the first coil are spaced apart from and face each other in a horizontal direction,
wherein the magnet and the second coil are spaced apart from and face each other in a vertical direction that is parallel to the central axis of the lens barrel,
wherein the magnet and the first coil are overlapped in the horizontal direction, and
wherein the magnet and the second coil are overlapped in the vertical direction.

2. The lens driving apparatus of claim 1 , wherein the first coil is provided between an outer side surface of the lens barrel and an inner side surface of the housing.

3. The lens driving apparatus of claim 2 , wherein the magnet is provided between the outer side surface of the lens barrel and the inner side surface of the housing.

4. The lens driving apparatus of claim 1 , wherein the first driving module and the second driving module move the lens barrel relative to the housing in the horizontal direction or the vertical direction.

5. The lens driving apparatus of claim 1 , wherein the second coil is provided under the magnet.

6. The lens driving apparatus of claim 1 , wherein the first driving module and the second driving module share the magnet to generate attractive force or repulsive force.

7. The lens driving apparatus of claim 1 , wherein the magnet includes four sub magnets, each sub magnet includes a side flat surface parallel to an inner side surface of the housing.

8. The lens driving apparatus of claim 1 , wherein the magnet includes four sub magnets that surround the lens barrel.

9. The lens driving apparatus of claim 1 , wherein the first coil and the second coil are not overlapped in the vertical direction.

10. The lens driving apparatus of claim 1 , wherein a magnetization direction of the magnet is inclined with respect a reference horizontal plane perpendicular to the vertical direction.

11. A camera module comprising:
the lens driving apparatus according to claim 1 ;
an image sensor provided under the lens driving apparatus; and
a circuit board on which the image sensor is mounted.

12. The camera module of claim 11 , wherein the first driving module and the second driving module move the lens barrel relative to the image sensor.

13. The camera module of claim 11 , further comprising:
a shake sensor sensing shake of the camera module; and
a control unit applying a control signal to the first driving module and the second driving module,
wherein the lens barrel is moved reference to the image sensor to compensate for the shake under the control of the control unit when the shake sensor senses shaking of the camera module.

14. A lens driving apparatus comprising:
a housing;
a barrel disposed in the housing;
a shaking compensation driving module disposed in the housing and including a magnet and a first coil, the magnet and the first coil spaced apart from and face each other;
a focus driving module disposed in the housing and including the magnet and a second coil, the magnet and the second coil spaced apart from and face each other; and
an elastic member connecting the housing and the barrel,
wherein the shaking compensation driving module and the focus driving module share the magnet to generate attractive force or repulsive force,
wherein a first surface of the magnet faces the first coil in a first direction and a second surface of the magnet faces the second coil in a second direction perpendicular to the first direction,
wherein the magnet includes a first sub magnet, a second sub magnet, a third sub magnet, and a fourth sub magnet,
wherein the first coil includes a first sub coil facing the first sub magnet, a second sub coil facing the second sub magnet, a third sub coil facing the third sub magnet, and a fourth sub coil facing the fourth sub magnet,
wherein the second coil is arranged around an axis parallel with a central axis of the barrel,
wherein the barrel is moved to compensate shaking in a first horizontal direction by the first sub coil, the first sub magnet, the third sub coil, and the third sub magnet, and
wherein the barrel is moved to compensate shaking in a second horizontal direction perpendicular to the first horizontal direction by the second sub coil, the second sub magnet, the fourth sub coil, and the fourth sub magnet.

15. The lens driving apparatus of claim 14 , wherein the first sub magnet, the second sub magnet, the third sub magnet, and the fourth sub magnet disposed around the barrel and in the housing.

16. The lens driving apparatus of claim 14 , wherein the magnet is disposed between an outer side surface of the barrel and an inner side surface of the housing.

17. The lens driving apparatus of claim 14 , wherein the first coil and the second coil are not overlapped in a vertical direction.

18. A camera module comprising:
the lens driving apparatus according to claim 14 ;
an image sensor disposed under the lens driving apparatus; and
a circuit board on which the image sensor is mounted.

19. The camera module of claim 18 , wherein the shaking compensation driving module and the focus driving module move the barrel relative to the image sensor.

20. The camera module of claim 18 , further comprising:
a shake sensor sensing shake of the camera module; and
a control unit applying a control signal to the shaking compensation driving module and the focus driving module,
wherein the barrel is moved reference to the image sensor to compensate for the shake under the control of the control unit when the shake sensor senses shaking of the camera module.

21. A camera module comprising:
a circuit board;
an image sensor provided on the circuit board;
a barrel provided over the image sensor;
a housing coupled to the circuit board;
a first driving module including a magnet and a first coil, the magnet and the first coil spaced apart from and facing each other, wherein the barrel is configured to move relative to the housing by the first driving module in a horizontal direction; and
a second driving module including the magnet and a second coil, the magnet and the second coil spaced apart from and facing each other, wherein the barrel is configured to move relative to the housing by the second driving module in a vertical direction,
wherein the first driving module and the second driving module share the magnet to generate attractive force or repulsive force,
wherein the magnet has a first surface facing the first coil and a second surface facing the second coil, the first surface of the magnet being perpendicular to the second surface of the magnet,
wherein the magnet includes a first sub magnet, a second sub magnet, a third sub magnet provided opposite to the first sub magnet, and a fourth sub magnet provided opposite to the second sub magnet,
wherein the first coil includes a first sub coil facing the first sub magnet, a second sub coil facing the second sub magnet, a third sub coil facing the third sub magnet, and a fourth sub coil

Assignees

• Lg Innotek Co Ltd

Inventors

• Yeo In Jae

Classifications

• H04N23/6812

  based on additional sensors, e.g. acceleration sensors · CPC title

• H04N23/687 Primary

  by shifting the lens or sensor position · CPC title

• H04N5/23258

  Electricity · mapped topic

• G03B2205/0046

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

• H04N5/23287 Primary

  Electricity · mapped topic