Camera module

1 . A camera module, comprising:

an optical image stabilization (OIS) base;

an OIS holder movably coupled to the OIS base in a first direction perpendicular to an optical axis, and fixedly coupled to an image sensor;

a first OIS actuator, configured to shift the image sensor in the first direction, comprising a first coil and a first magnet opposing each other in either one of the first direction and a second direction perpendicular to the optical axis and intersecting the first direction;

an OIS guide interposed between the OIS base and the OIS holder;

an auto focus (AF) carrier, movably coupled to an AF base, accommodating a lens module, wherein the image sensor is configured to move in the first direction relative to the lens module; and

a plurality of ball members, wherein one of the plurality of ball members is disposed between the OIS base and the OIS guide, and another of the plurality of ball members is disposed between the OIS guide and the OIS holder to make the OIS holder and the image sensor movable relative to the OIS base; and

a yoke disposed at the OIS base and opposing the first magnet in a third direction parallel to the optical axis, wherein the OIS holder is configured to be pulled toward the OIS base by attractive force between the yoke and the first magnet, and wherein the attractive force maintains the one of the plurality of ball members in contact with the OIS base and the OIS guide and maintains the another of the plurality of ball members in contact with the OIS guide and the OIS holder,

wherein the first coil is disposed at one of the OIS holder and the OIS base, and the first magnet is disposed at the other of the OIS holder and the OIS base, and

wherein the one of the plurality of ball members is configured to roll in one direction among the first direction and the second direction, and the another of the plurality of ball members is configured to roll in the other direction among the first direction and the second direction.

2 . The camera module of claim 1 , further comprising:

an AF actuator configured to move the lens module in a direction parallel to the optical axis, and including an AF coil disposed at the AF base, and an AF magnet disposed at the AF carrier.

3 . The camera module of claim 2 , wherein the AF base is disposed in the third direction that an imaging plane of the image sensor faces with respect to the OIS base, and

wherein the OIS base, the one of the plurality of ball members, the another of the plurality of ball members, and the OIS holder are stacked in order in the third direction.

4 . The camera module of claim 3 , further comprising:

an OIS cover disposed between the OIS base and the AF base, and configured to prevent the OIS holder from being separated in the third direction.

5 . The camera module of claim 2 ,

wherein the AF base is disposed in a the third direction that an imaging plane of the image sensor faces with respect to the OIS base, and

wherein the OIS base, the one of the plurality of ball members, the another of the plurality of ball members, and the OIS holder are stacked in order in a direction opposite to the third direction.

6 . The camera module of claim 1 , wherein the OIS holder is movably coupled to the OIS base in the second direction,

wherein the camera module further comprises a second OIS actuator configured to shift the image sensor in the second direction,

wherein the second OIS actuator includes a second magnet and a second coil opposing each other in either one of the first direction and the second direction, and

wherein the second coil is disposed at one of the OIS holder and the OIS base, and the second magnet is disposed at the other of the OIS holder and the OIS base.

7 . The camera module of claim 1 , wherein a first ball member is disposed at the OIS base or the OIS guide and is configured to roll along a first guide groove extending in one direction among the first direction and the second direction, and

wherein a second ball member is disposed at the OIS holder or the OIS guide and is configured to roll along a second guide groove extending in the other direction among the first direction and the second direction.

8 . The camera module of claim 1 , further comprising:

a reflective member configured to change a direction of light incident to the image sensor.

9 . The camera module of claim 8 ,

wherein the lens module is disposed at one side of the reflective member, and

wherein the reflective member is configured to change light passing through the lens module to be directed to the image sensor.

10 . The camera module of claim 9 ,

wherein the reflective member is disposed in the third direction toward the imaging plane of the image sensor with respect to the OIS base, and

wherein the OIS base, the one of the plurality of ball members, the another of the plurality of ball members, and the OIS holder are stacked in order in the third direction.

11 . The camera module of claim 10 , further comprising:

an OIS cover disposed on the OIS base and configured to prevent the OIS holder from being separated in the third direction.

12 . The camera module of claim 9 ,

wherein the AF base is disposed in a the third direction that the imaging plane of the image sensor faces with respect to the OIS base, and

wherein the OIS base, the one of the plurality of ball members, the another of the plurality of ball members, and the OIS holder are stacked in order in a direction opposite to the third direction.

13 . A camera module, comprising:

an OIS base;

an OIS holder movably coupled to the OIS base in at least one direction perpendicular to the optical axis and fixedly coupled to an image sensor;

a lens module, wherein the image sensor is configured to move in the at least one direction relative to the lens module;

an OIS actuator, configured to shift the image sensor in the at least one direction perpendicular to the optical axis, comprising a magnet;

an OIS guide interposed between the OIS base and the OIS holder; and

a plurality of ball members, wherein one of the plurality of ball members is disposed between the OIS base and the OIS guide, and another of the plurality of ball members is disposed between the OIS guide and the OIS holder to make the OIS holder and the image sensor movable relative to the OIS base; and

a yoke disposed at the OIS base and opposing the magnet in a direction parallel to the optical axis, wherein the OIS holder is configured to be pulled toward the OIS base by attractive force between the yoke and the magnet, and wherein the attractive force maintains the one of the plurality of ball members in contact with the OIS base and the OIS guide and maintains the another of the plurality of ball members in contact with the OIS guide and the OIS holder,

wherein either one of the OIS base and the OIS holder includes a receiving portion extending in the direction parallel to the optical axis to receive a portion of the lens module, and

wherein the one of the plurality of ball members is configured to roll in one direction among the at least one direction and another direction perpendicular to the optical axis and intersecting the at least one direction, and the another of the plurality of ball members is configured to roll in the other direction among the at least one direction and the another direction.

14 . The camera module of claim 13 , wherein the OIS actuator is disposed in the OIS base and the OIS holder.

15 . The camera module of claim 13 , wherein the OIS actuator further includes a coil disposed at one of the OIS holder and the OIS base, and the magnet disposed at the other of the OIS holder and the OIS base, and

wherein the coil and the magnet oppose each other in a direction among the at least one direction perpendicular to the optical axis.

16 . A camera module, comprising:

an optical image stabilization (OIS) base;

an OIS holder coupled to the OIS base;

an image sensor attached to OIS holder and configured to move together with the OIS holder;

an OIS actuator configured to move the OIS holder with respect to the OIS base in first and second directions perpendicular to a direction in which light is incident to the image sensor, wherein the OIS actuator includes a first coil and a first magnet opposing each other in the first direction perpendicular to an optical axis;

an OIS guide interposed between the OIS base and the OIS holder;

a plurality of ball members, wherein one of the plurality of ball members is disposed between the OIS base and the OIS guide, and another of the plurality of ball members is disposed between the OIS guide and the OIS holder to make the OIS holder and the image sensor movable relative to the OIS base;

an auto focus (AF) carrier, movably coupled to an AF base, accommodating a lens module, wherein the image sensor is configured to move in the first and second directions relative to the lens module; and

a yoke disposed at the OIS base and opposing the first magnet in a third direction parallel to the optical axis, wherein the OIS holder is configured to be pulled toward the OIS base by attractive force between the yoke and the first magnet, and wherein the attractive force maintains the one of the plurality of ball members in contact with the OIS base and the OIS guide and maintains the another of the plurality of ball members in contact with the OIS guide and the OIS holder,

wherein the first coil is disposed at one of the OIS holder and the OIS base, and the first magnet is disposed at the other of the OIS holder and the OIS base, and

wherein the one of the plurality of ball members is configured to roll in one direction among the first direction and the second direction, and the another of the plurality of ball members is configured to roll in the other direction among the first direction and the second direction.

17 . The camera module of claim 16 , wherein the OIS actuator further includes a second coil and a second magnet opposing each other in the second direction.

18 . The camera module of claim 16 , further comprising:

an AF actuator configured to move the lens module in the third direction parallel to an the optical axis.

19 . The camera module of claim 16 , wherein the OIS holder is configured to move with respect to the OIS guide in one of the first and second directions, and

wherein the OIS guide is configured to move with respect to the OIS base in the other of the first and second directions.