Camera module and electronic device including the same
An electronic device according to an embodiment of the disclosure includes: a housing and a camera module, at least part of which is disposed in the housing. The camera module includes a camera housing, a sensor assembly including an image sensor and is fixed to the camera housing, and a lens unit, at least part of which is accommodated in a space formed by the camera housing and the sensor assembly, the lens unit being configured such that all or part of the lens unit moves relative to the camera housing and the sensor assembly. The lens unit includes a lens assembly including a lens, a first carrier to which the lens assembly is coupled, a second carrier in which the first carrier is accommodated to be movable in a direction perpendicular to an optical axis of the lens, a stopper coupled to the second carrier to cover at least part of the first carrier, and a first damper, at least part of which is disposed between the stopper and the first carrier.
1 . A camera module comprising:
a fixed structure including a camera housing and an image sensor fixed to the camera housing;
a lens unit, at least part of which is accommodated in the camera housing, the lens unit being configured to move all and/or part thereof relative to the fixed structure; and
a driving member configured to move all and/or part of the lens unit, the driving member including a plurality of coils disposed on the camera housing and a plurality of magnets disposed on the lens unit,
wherein the lens unit includes:
a lens assembly including a lens;
an auto focus (AF) carrier disposed in the camera housing and configured to be movable in a direction of an optical axis of the lens; and
an optical image stabilization (OIS) carrier coupled to the lens assembly, the OIS carrier being disposed inside the AF carrier and configured to be movable in a direction perpendicular to the optical axis,
wherein the plurality of coils include an AF coil disposed on a first sidewall of the camera housing and a plurality of OIS coils disposed on a second sidewall, a third sidewall, and a fourth sidewall of the camera housing, respectively,
wherein the plurality of magnets include an AF magnet disposed on the AF carrier facing the AF coil and a plurality of OIS magnets disposed on the OIS carrier facing the plurality of OIS coils, respectively,
wherein each of the plurality of OIS magnets includes a first area in which a facing surface facing the plurality of OIS coils has a first polarity, a second area having a second polarity different from the first polarity, and a third area having the first polarity, and
wherein each of the plurality of OIS coils includes a first coil having a portion facing the first area and another portion facing the second area and a second coil having a portion facing the second area and another portion facing the third area.
2 . The camera module of claim 1 , wherein the OIS carrier includes a guide configured to be movable relative to the AF carrier in a direction of a first shift axis perpendicular to the optical axis and a first carrier configured to be movable relative to the guide in a direction of a second shift axis perpendicular to the optical axis and the first shift axis.
3 . The camera module of claim 2 , wherein the plurality of OIS magnets include a first OIS magnet disposed on the guide and a second OIS magnet and a third OIS magnet disposed on the first carrier,
wherein the plurality of OIS coils include a first OIS coil disposed on the second sidewall facing the first OIS magnet, a second OIS coil disposed on the third sidewall facing the second OIS magnet, and a third OIS coil disposed on the fourth sidewall facing the third OIS magnet.
4 . The camera module of claim 3 , wherein the first carrier and the guide are configured to move in the direction of the first shift axis relative to the AF carrier at least by an interaction between the first OIS coil and the first OIS magnet, and
wherein the first carrier is configured to move in the direction of the second shift axis relative to the guide at least by an interaction between the second OIS coil and the second OIS magnet and/or an interaction between the third OIS coil and the third OIS magnet.
5 . The camera module of claim 1 , further comprising a plurality of sensor modules including at least one sensor configured to sense a change in position between the plurality of OIS coils and the plurality of OIS magnets, and
wherein each of the plurality of sensor modules is disposed to overlap the first area and the second area and/or overlap the second area and the third area when the facing surface is viewed.
6 . The camera module of claim 5 , wherein each of the plurality of sensor modules is disposed such that a portion faces the first area and another portion faces the second area,
wherein positions of the plurality of OIS magnets are configured to be detected based on a third signal determined using a first signal sensed from an area corresponding to the first area and a second signal sensed from an area corresponding to the second area, and
wherein the third signal is determined by dividing the sum of the first signal and the second signal by the difference between the first signal and the second signal.
7 . The camera module of claim 1 , wherein the AF carrier is disposed in the camera housing and configured to be movable in a direction of the optical axis relative to the camera housing, and
wherein the OIS carrier and the lens assembly are configured to move together with the AF carrier in the direction of the optical axis.
8 . The camera module of claim 1 , wherein the lens assembly further includes:
a stopper coupled to the AF carrier to cover at least part of the OIS carrier; and
a first damper, at least part of which is disposed between at least the stopper and the OIS carrier.
9 . The camera module of claim 8 , wherein the OIS carrier includes, on a surface facing the stopper, a first receiving portion in which the first damper is accommodated.
10 . The camera module of claim 9 , wherein the first damper comprises a cured liquid material disposed in the first receiving portion.
11 . The camera module of claim 9 , wherein the stopper includes a first protrusion, at least part of which is disposed inside the first damper, and
wherein the first protrusion extends from at least part of the stopper toward the first receiving portion.
12 . The camera module of claim 11 , wherein the stopper further includes a base portion having an opening surrounding the lens assembly, and
wherein the first protrusion extends from an inner periphery of the base portion to surround the opening.
13 . The camera module of claim 8 , wherein the stopper includes a first surface facing the OIS carrier and a second surface facing away from the first surface, and
wherein at least a partial area of the first surface is in contact with the first damper.
14 . The camera module of claim 13 , wherein the stopper includes, in a partial area thereof, a hole overlapping the first damper in a direction of the optical axis, and
wherein the first damper contacts a partial area of the first surface adjacent to the hole, and at least part of the first damper is accommodated in the hole.
15 . The camera module of claim 1 , wherein the camera housing includes a frame surrounding the lens unit in a lateral direction and a cover coupled to the frame to cover part of the lens unit, and
wherein the AF carrier of the lens unit is disposed inside the frame and configured to be movable in a direction of the optical axis.
16 . The camera module of claim 15 , further comprising a second damper disposed between the frame and the stopper.
17 . An electronic device comprising:
a housing and a camera module including a camera, at least part of which is disposed in the housing,
wherein the camera module includes:
a fixed structure including a camera housing and an image sensor;
a lens unit, at least part of which is accommodated in the camera housing, the lens unit configured to move all and/or part thereof relative to the fixed structure; and
a driving member configured to move all and/or part of the lens unit, the driving member including a plurality of coils disposed on the camera housing and a plurality of magnets disposed on the lens unit,
wherein the lens unit includes:
a lens assembly including a lens;
an auto focus (AF) carrier disposed in the camera housing and configured to be movable in a direction of an optical axis of the lens; and
an optical image stabilization (OIS) carrier coupled to the lens assembly, the OIS carrier being disposed inside the AF carrier and configured to be movable in a direction perpendicular to the optical axis,
wherein the plurality of coils include an AF coil disposed on a first sidewall of the camera housing and a plurality of OIS coils disposed on a second sidewall, a third sidewall, and a fourth sidewall of the camera housing, respectively,
wherein the plurality of magnets include an AF magnet disposed on the AF carrier facing the AF coil and a plurality of OIS magnets disposed on the OIS carrier facing the plurality of OIS coils, respectively,
wherein each of the plurality of OIS magnets includes a first area in which a facing surface facing the plurality of OIS coils has a first polarity, a second area having a second polarity different from the first polarity, and a third area having the first polarity, and
wherein each of the plurality of OIS coils includes a first coil comprising a portion facing the first area and another portion facing the second area and a second coil comprising a portion facing the second area and another portion facing the third area.
18 . The electronic device of claim 17 , wherein the OIS carrier includes a guide configured to be movable relative to the AF carrier in a direction of a first shift axis perpendicular to the optical axis and a first carrier configured to be movable relative to the guide in a direction of a second shift axis perpendicular to the optical axis and the first shift axis,
wherein the plurality of OIS magnets include a first OIS magnet disposed on the guide and a second OIS magnet and a third OIS magnet disposed on the first carrier,
wherein the plurality of OIS coils include a first OIS coil disposed on the second sidewall facing the first OIS magnet, a second OIS coil disposed on the third sidewall facing the second OIS magnet, and a third OIS coil disposed on the fourth sidewall facing the third OIS magnet,
wherein the first carrier and the guide are configured to move in the direction of the first shift axis relative to the AF carrier by an interaction between the first OIS coil and the first OIS magnet, and
wherein the first carrier is configured to move in the direction of the second shift axis relative to the guide by an interaction between the second OIS coil and the second OIS magnet or an interaction between the third OIS coil and the third OIS magnet.
19 . The electronic device of claim 17 , wherein the camera module further includes a plurality of sensor modules including at least one sensor configured to sense a change in position between the plurality of OIS coils and the plurality of OIS magnets, and
wherein each of the plurality of sensor modules is disposed to overlap the first area and the second area or overlap the second area and the third area when the facing surface is viewed.
20 . The electronic device of claim 19 , wherein each of the plurality of sensor modules is disposed such that a portion faces the first area and another portion faces the second area,
wherein positions of the plurality of OIS magnets are configured to be detected based on a third signal determined using a first signal sensed from an area corresponding to the first area and a second signal sensed from an area corresponding to the second area, and
wherein the third signal is determined by dividing the sum of the first signal and the second signal by the difference between the first signal and the second signal.