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EP-4738001-A1 - ELECTRONIC DEVICE COMPRISING CAMERA MODULE

EP4738001A1EP 4738001 A1EP4738001 A1EP 4738001A1EP-4738001-A1

Abstract

This camera module comprises: an OIS structure, which moves in the direction perpendicular to an optical axis and includes a first OIS guide unit and a second OIS guide unit; an AF structure, which includes an AF guide unit, is disposed inside the OIS structure and moves in the optical axis direction; a first magnetic body disposed in the first OIS guide unit; a second magnetic body disposed in the second OIS guide unit; a first OIS coil, which faces one surface of the first magnetic body and allows the OIS structure to move in the first axis direction perpendicular to the optical axis; a second OIS coil allowing the OIS structure to move in the second axis direction perpendicular to the optical axis and the first axis; an AF coil, which is fixed to the AF guide unit and allows the AF structure to move along the optical axis; an AF ball disposed between the AF guide unit and the first OIS guide unit; and an OIS ball disposed between a camera housing and the OIS structure.

Inventors

  • AN, HYOSANG

Assignees

  • Samsung Electronics Co., Ltd.

Dates

Publication Date
20260506
Application Date
20240802

Claims (15)

  1. An electronic device 101 including a camera module 180, 300, or 701, wherein the camera module comprises: a lens unit 321; an OIS structure 350 configured to move in a direction perpendicular to an optical axis OA of the lens unit and including a first OIS guide portion 351 and a second OIS guide portion 352; an AF structure 360 including an AF guide portion 361 facing the first OIS guide portion, having at least a portion disposed inside the OIS structure, and configured to move in an optical axis direction of the lens unit; a camera housing 330 configured to cover the OIS structure and the AF structure; a first magnetic body 420 disposed in the first OIS guide portion and having at least a portion facing the AF guide portion; a second magnetic body 520 disposed in the second OIS guide portion; a first OIS coil 430 configured to face one surface of the first magnetic body and generate an electromagnetic force with the first magnetic body so that the OIS structure moves in a first axial direction perpendicular to the optical axis; a second OIS coil 530 configured to face one surface of the second magnetic body and generate an electromagnetic force with the second magnetic body so that the OIS structure moves in a second axis direction perpendicular to the optical axis and the first axis; an AF coil 440 fixed to the AF guide portion to face the other surface of the first magnetic body, and configured to generate an electromagnetic force with the first magnetic body so that the AF structure moves along the optical axis; at least one AF ball b1 disposed between the AF guide portion and the first OIS guide portion; and an OIS ball b2 disposed between the camera housing and the OIS structure.
  2. The electronic device of claim 1, wherein the AF guide portion is positioned inside the OIS structure, and the AF structure is configured to move relative to the OIS structure in the optical axis direction.
  3. The electronic device of claim 1, wherein the OIS structure comprises an OIS side portion 353 configured to connect the first OIS guide portion and the second OIS guide portion, and the AF structure comprises an AF side portion 362 spaced apart from the OIS side portion by a first distance in a lower portion of the OIS side portion, and is movable relative to the OIS structure in the optical axis direction by the first distance.
  4. The electronic device of claim 1, wherein the first OIS coil and the second OIS coil are fixed to the camera housing.
  5. The electronic device of claim 1, wherein the camera module further comprises a first flexible printed circuit board (FPCB) 301 configured to transfer a current generated in a driving circuit thereof to the first OIS coil and the second OIS coil.
  6. The electronic device of claim 1, wherein the camera module further comprises a second FPCB 302 configured to transfer a current generated in a driving circuit thereof to the AF coil.
  7. The electronic device of claim 1, wherein the camera module further comprises: an image sensor 390 disposed in the AF structure and electrically connected to a third FPCB 303 of the electronic device; and an infrared (IR) filter 380 disposed in the AF structure so as to cover the image sensor and configured to face the lens unit.
  8. The electronic device of claim 7, wherein the AF structure comprises a first mounting portion 364 in which the image sensor is positioned and a second mounting portion 365 formed in an upper side of the first mounting portion and in which the IR filter is disposed.
  9. The electronic device of claim 1, wherein the first OIS coil is configured to face a first surface of the first magnetic body, the second OIS coil is configured to face a first surface of the second magnetic body, and the AF coil is configured to face a second surface perpendicular to the first surface of the first magnetic body.
  10. The electronic device of claim 9, wherein the first magnetic body comprises a polarized region having at least one N pole and at least one S pole on each surface.
  11. The electronic device of claim 1, further comprising a first guide groove formed in at least one of the AF guide portion or the first OIS guide portion and in which the AF ball is disposed.
  12. The electronic device of claim 1, wherein the camera module further comprises a middle guide 340 coupled with the OIS structure between the camera housing and the OIS structure, and the middle guide comprises a second guide groove in which the OIS ball is seated.
  13. The electronic device of claim 1, wherein the OIS structure comprises a third guide groove in which the OIS ball is disposed.
  14. The electronic device of claim 1, wherein the camera module further comprises a rhomboid prism 600 disposed in the AF structure and having at least a portion facing the lens unit.
  15. The electronic device of claim 3, further comprising at least one camera module 701 configured to face the OIS side portion of the OIS structure.

Description

[Technical Field] Embodiments disclosed in this document relate to an electronic device including a camera module. [Background Art] Various electronic devices, such as smart phones, tablet personal computers (PCs), portable multimedia players (PMPs), personal digital assistants (PDAs), laptop PCs, and wearable devices such as wrist watches and head-mounted displays (HMDs), may include cameras and capture images using cameras. As the number of users taking photos and videos with electronic devices increases, the performance of cameras included in the electronic devices is also improving. For example, when capturing an image using a camera included in an electronic device, it may be necessary to adjust the focus on a subject or compensate for shaking (e.g., hand shake) that may occur during shooting in order to obtain a clear image. A camera module used in an electronic device may include an auto focus (AF) function that automatically adjusts the focus of a lens on a subject and/or an optical image stabilizer (OIS) function that compensates for shaking that occurs in a camera module when photographing a subject. The AF function and OIS function of the camera module may be driven based on an electromagnetic force using a magnet and a coil. The above information may be provided as the related art for the purpose of facilitating the understanding of the disclosure. No assertion or determination is made as to whether any of the above description may be applied as the prior art related to the disclosure. [Disclosure of Invention] [Technical Problem] The camera module may include an AF structure used for an auto focus (AF) function that automatically adjusts the focus of a lens on a subject, and an optical image stabilizer (OIS) structure used for an OIS function that compensates for image shake. The AF structure and the OIS structure may be driven based on electromagnetic forces using magnets and coils. The camera module may include an AF actuator including an AF magnet and an AF coil to move the AF structure in substantially an optical axis direction. Further, the camera module may include an OIS actuator including an OIS magnet and an OIS coil to move the OIS structure in a direction substantially perpendicular to the optical axis. In an embodiment, the camera module may have an AF structure that is an elastic member such as a plate spring or wire. A plurality of AF actuators may be fixed to the AF structure formed of the elastic member. In this case, the plurality of AF actuators may be symmetrically disposed on the AF structure so that the AF structure does not tilt during AF operation. For example, two of at least four AF actuators may be disposed on the elastic member to face each other, and the remaining two AF actuators may be disposed on the elastic member to face each other. The camera module requires multiple AF actuators to be disposed on the AF structure to prevent the AF structure from tilting, which may increase the volume occupied inside the electronic device due to the multiple AF actuators. Further, the multiple AF actuators may cause magnetic interference with magnetic bodies surrounding the camera module. Technical problems to be achieved in this document are not limited to the above-described technical problems, and other technical problems that are not described may be clearly understood by those skilled in the art from the description below. [Solution to Problem] According to an embodiment of the disclosure, an electronic device may include a camera module. The camera module may include a lens unit. Further, the camera module may include an OIS structure configured to move in a direction perpendicular to an optical axis of the lens unit and including a first OIS guide portion and a second OIS guide portion. Further, the camera module may include an AF guide portion configured to face the first OIS guide portion, and an AF structure at least partially disposed inside the OIS structure and configured to move in an optical axis direction of the lens unit. Further, the camera module may include a camera housing configured to cover the OIS structure and the AF structure. Further, the camera module may include a first magnetic body disposed in the first OIS guide portion and at least partially facing the AF guide portion. Further, the camera module may include a second magnetic body disposed in the second OIS guide portion. Further, the camera module may include a first OIS coil configured to face one surface of the first magnetic body and generate an electromagnetic force with the first magnetic body so that the OIS structure moves in a first axial direction perpendicular to the optical axis. Further, the camera module may include a second OIS coil configured to face one surface of the second magnetic body and generate an electromagnetic force with the second magnetic body so that the OIS structure moves in a second axis direction perpendicular to the optical axis and the first axis. Further, the