KR20220011763A - Lens driving device and camera module - Google Patents

Abstract

The present embodiment relates to a lens driving device capable of minimizing a magnetic field interference, and the lens driving device includes: a housing; a bobbin; a first coil; a first magnet; a base; a substrate including a second coil; a first sensor; a second magnet; and a second sensor, wherein the housing includes a first side part, a second side part, and a first corner part disposed between the first side part and the second side part, the first magnet includes a first magnet unit disposed on the first side part of the housing and a second magnet unit disposed on the second side part of the housing, the second sensor is disposed on the first corner part disposed between the first side part of the housing and the second side part of the housing, the first magnet unit includes a first groove formed in a side of the first corner part, and the second magnet unit includes a second groove formed in a side of the first corner part.

Description

Lens driving device and camera module

This embodiment relates to a lens driving device and a camera module.

The content described below provides background information on the present embodiment and does not describe the prior art.

As the spread of various portable terminals is widespread and wireless Internet service is commercialized, the needs of consumers related to portable terminals are also diversifying, and various types of additional devices are being installed in the portable terminals.

Among them, there is a camera module that takes a picture or video of a subject as a representative one. On the other hand, the autofocus function for automatically adjusting the focus according to the distance of the subject is applied to the camera module. Furthermore, recently, a technology for real-time feedback control of the autofocus function is being studied. However, in the conventional camera module, there is a problem in that magnetic field interference between the driving magnet and the sensing magnet disposed to feedback control the autofocus function occurs.

An object of the present embodiment is to provide a lens driving device including a structure in which magnetic field interference of a driving magnet to an AF feedback sensor is minimized.

Another object of the present invention is to provide a camera module including the lens driving device.

A lens driving device according to the present embodiment includes a housing; a bobbin disposed in the housing; a first coil disposed on the bobbin; a first magnet disposed in the housing and facing the first coil; a base disposed under the housing; a substrate including a second coil facing the first magnet and disposed on the base; a first sensor disposed on the base and sensing the first magnet; a second magnet disposed on the bobbin; and a second sensor disposed in the housing and sensing the second magnet, wherein the housing includes a first side portion, a second side portion, and a first corner portion disposed between the first side portion and the second side portion wherein the first magnet includes a first magnet unit disposed on a first side of the housing and a second magnet unit disposed on a second side of the housing, wherein the second sensor includes a first magnet unit disposed on a first side of the housing. It is disposed in a first corner portion disposed between the side portion and the second side portion of the housing, wherein the first magnet unit includes a first groove formed at the first corner portion side, and the second magnet unit includes the second magnet unit. It may include a second groove formed on the side of the first corner.

The first magnet unit includes a first side disposed on the side of the first corner and a second side facing the first coil, and the first groove connects the first side and the second side. can

The first magnet unit further includes a third side opposite to the first side and a fourth side opposite to the second side, wherein an area of the second side of the first magnet unit is equal to the first side The area of the fourth side of the magnet unit may be smaller than the area of the first side of the first magnet unit, and the area of the second side of the first magnet unit may be smaller than the area of the second side.

The second magnet unit includes a fifth side disposed on the first corner portion side and a sixth side facing the first coil, and the second groove connects the fifth side and the sixth side. can

The second magnet unit further includes a seventh side opposite to the fifth side and an eighth side opposite to the sixth side, wherein the area of the sixth side of the second magnet unit is equal to the area of the second The area of the eighth side of the magnet unit may be smaller, and the area of the fifth side of the second magnet unit may be smaller than the area of the seventh side of the second magnet unit.

a second substrate on which the second sensor is disposed; You can meet home.

A distance between the second sensor and the second magnet may be shorter than a distance between the second substrate and the second magnet.

A lens driving device according to the present embodiment includes a housing; a bobbin disposed in the housing; a first coil disposed on the bobbin; a first magnet disposed in the housing and facing the first coil; a base disposed under the housing; a first substrate including a second coil facing the magnet and disposed on the base; a first sensor disposed on the base and sensing the first magnet; a second magnet disposed on the bobbin; and a second sensor disposed on the housing and sensing the second magnet, wherein the first magnet includes a first magnet unit disposed on a first side of the housing and a second sensor disposed on a second side of the housing two magnet units, wherein the second sensor is disposed in a first corner portion disposed between a first side portion of the housing and a second side portion of the housing, wherein the first magnet unit faces the first coil a first surface, a second surface disposed on the side of the first corner part, and a first groove connecting the first surface and the second surface, wherein the second magnet unit faces the first coil It may include a third surface, a fourth surface disposed on the side of the first corner, and a second groove connecting the third surface and the fourth surface.

A size of the second surface may be smaller than a size of the first surface.

The housing further includes a third side portion disposed opposite to the first side portion, a fourth side portion disposed opposite to the second side portion, and a second corner portion disposed between the third side portion and the fourth side portion and, the first magnet further includes a third magnet unit disposed on the third side portion and a fourth magnet unit disposed on the fourth side portion, wherein the third magnet unit is a third magnet unit facing the first coil. and a fifth surface, a sixth surface disposed on the side of the second corner portion, and a third groove connecting the fifth surface and the sixth surface, wherein the fourth magnet unit faces the first coil It may include a seventh surface, an eighth surface disposed on the side of the second corner portion, and a fourth groove connecting the seventh surface and the eighth surface.

The first magnet unit may further include a ninth surface disposed opposite to the first surface, and an area of the first surface may be smaller than an area of the ninth surface.

A length of the first groove from the first surface may be smaller than a length of the first groove from the second surface.

The first groove may include at least one of a flat surface and a curved surface.

Through the present embodiment, it is possible to minimize the magnetic field interference that the driving magnet exerts on the AF feedback sensor.

1 is a perspective view of a lens driving device according to the present embodiment.
FIG. 2 is a cross-sectional view taken along XY of FIG. 1 .
3 is an exploded perspective view of the lens driving device according to the present embodiment.
4 is an exploded perspective view of the lens driving device according to the present embodiment as viewed from a different direction from that of FIG. 3 .
5 is an exploded perspective view showing a first mover and a related configuration according to the present embodiment.
6 is an exploded perspective view showing a second mover according to the present embodiment.
Fig. 7 is an exploded perspective view showing the stator according to the present embodiment.
8 is an exploded perspective view showing an elastic member, a support member, and a related configuration according to the present embodiment.
9 is a plan view illustrating the lens driving device according to the present embodiment without a cover.
10 is a perspective view illustrating a driving magnet, a first sensing unit, and related components according to the present embodiment.
11 is a plan view of FIG. 10 as viewed from above.
12 is a plan view illustrating a driving magnet, a first sensing unit, and related driving of a lens driving device according to a modified example.
13 is a perspective view showing an optical device according to the present embodiment.

Hereinafter, some embodiments of the present invention will be described with reference to exemplary drawings for convenience of description. However, the technical spirit of the present invention is not limited to some embodiments to be described.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms.

When it is described that a component is 'connected' or 'coupled' to another component, the component may be directly connected or coupled to the other component, but another component is between the component and the other component. It should be understood that elements may be 'connected' or 'coupled'.

An 'optical axis direction' used below is defined as an optical axis direction of a lens coupled to the lens driving device. Meanwhile, the 'optical axis direction' may correspond to a 'vertical direction', a 'z-axis direction', and the like.

The 'autofocus function' used below is to automatically focus on the subject by adjusting the distance from the image sensor by moving the lens in the optical axis direction according to the distance of the subject so that a clear image of the subject can be obtained on the image sensor. defined as a function. Meanwhile, 'auto focus' may be used interchangeably with 'AF (Auto Focus)'.

The 'shake correction function' used below is defined as a function of moving or tilting the lens in a direction perpendicular to the optical axis direction to cancel vibration (movement) generated in the image sensor by an external force. Meanwhile, 'hand shake correction' may be used interchangeably with 'OIS (Optical Image Stabilization)'.

Hereinafter, any one of the AF driving coil 220 , the driving magnet 320 , and the OIS driving coil 422 is referred to as a 'first driving unit', the other is referred to as a 'second driving unit', and the other one is referred to as a 'third driving unit'. can be called Meanwhile, the AF driving coil 220 , the driving magnet 320 , and the OIS driving coil 422 may be disposed by changing their positions.

Hereinafter, any one of the AF driving coil 220 and the OIS driving coil 422 may be referred to as a 'first coil' and the other one may be referred to as a 'second coil'.

Hereinafter, any one of the driving magnet 320 , the sensing magnet 730 , and the compensation magnet 800 will be referred to as a 'first magnet', the other will be referred to as a 'second magnet', and the other one will be referred to as a 'third magnet'. can

Hereinafter, any one of the substrate 410 of the stator 400 and the substrate 720 of the first sensing unit 700 may be referred to as a 'first substrate' and the other may be referred to as a 'second substrate'.

Hereinafter, any one of the AF feedback sensor 710 and the OIS feedback sensor 900 may be referred to as a 'first sensor' and the other one may be referred to as a 'second sensor'.

Hereinafter, the configuration of the optical device according to the present embodiment will be described with reference to the drawings.

13 is a perspective view of an optical device according to the present embodiment.

The optical device is any one of a cell phone, a mobile phone, a smart phone, a portable smart device, a digital camera, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), and a navigation device can be However, the type of optical device is not limited thereto, and any device for taking an image or photo may be referred to as an optical device.

The optical device may include a body 1 . The body 1 may form the exterior of an optical device. The body 1 may accommodate the camera module 3 . The display unit 2 may be disposed on one surface of the body 1 . As an example, the display unit 2 and the camera module 3 are disposed on one side of the body 1, and the camera module 3 is additionally disposed on the other side (a side opposite to the one side) of the body 1 . can

The optical device may include a display unit 2 . The display unit 2 may be disposed on one surface of the body 1 . The display unit 2 may output an image captured by the camera module 3 .

The optics may include a camera module 3 . The camera module 3 may be disposed on the body 1 . At least a portion of the camera module 3 may be accommodated in the body 1 . A plurality of camera modules 3 may be provided. The camera module 3 may be disposed on one surface of the main body 1 and the other surface of the main body 1 , respectively. The camera module 3 may capture an image of a subject.

Hereinafter, the configuration of the camera module according to the present embodiment will be described.

The camera module 3 may include a lens module. The lens module may include at least one lens. The lens module may include a lens and a barrel. The lens module may be coupled to the bobbin 210 of the lens driving device. The lens module may be coupled to the bobbin 210 by screw coupling and/or adhesive. The lens module may move integrally with the bobbin 210 .

The camera module 3 may include a filter. The filter may include an infrared filter. The infrared filter may block light in the infrared region from being incident on the image sensor. The infrared filter may be disposed between the lens module and the image sensor. For example, the infrared filter may be disposed on a sensor base (not shown) disposed between the lens driving device and the printed circuit board. As another example, the infrared filter may be disposed on the base 430 .

The camera module 3 may include a printed circuit board. A lens driving device may be disposed on the printed circuit board. In this case, a sensor base may be disposed between the printed circuit board and the lens driving device. The printed circuit board may be electrically connected to the lens driving device. An image sensor may be disposed on the printed circuit board. The printed circuit board may be electrically connected to the image sensor.

The camera module 3 may include an image sensor. The image sensor may be disposed on a printed circuit board. The image sensor may be electrically connected to the printed circuit board. For example, the image sensor may be coupled to a printed circuit board by surface mounting technology (SMT). As another example, the image sensor may be coupled to a printed circuit board by flip chip technology. The image sensor may be disposed so that the lens and the optical axis coincide. That is, the optical axis of the image sensor and the optical axis of the lens may be aligned. The image sensor may convert light irradiated to the effective image area of the image sensor into an electrical signal. The image sensor may be any one of a charge coupled device (CCD), a metal oxide semi-conductor (MOS), a CPD, and a CID.

The camera module 3 may include a control unit. The control unit may be disposed on the printed circuit board. The controller may individually control the direction, intensity, and amplitude of the current supplied to the AF driving coil 220 and the OIS driving coil 422 of the lens driving device. The controller may control the lens driving device to perform an autofocus function and/or an image stabilization function. Furthermore, the controller may perform autofocus feedback control and/or handshake correction feedback control for the lens driving device.

Hereinafter, the configuration of the lens driving device according to the present embodiment will be described with reference to the drawings.

1 is a perspective view of a lens driving device according to this embodiment, FIG. 2 is a cross-sectional view taken along XY of FIG. 1, FIG. 3 is an exploded perspective view of the lens driving device according to this embodiment, and FIG. 3 is an exploded perspective view of the lens driving device according to a different direction from FIG. 3 , FIG. 5 is an exploded perspective view showing a first mover and a related configuration according to the present embodiment, and FIG. 6 is a second mover according to the present embodiment It is an exploded perspective view showing, FIG. 7 is an exploded perspective view showing a stator according to this embodiment, FIG. 8 is an exploded perspective view showing an elastic member, a support member, and a related configuration according to the present embodiment, and FIG. 9 is this embodiment It is a plan view showing the lens driving device according to the example without the cover, FIG. 10 is a perspective view showing the driving magnet, the first sensing unit, and related components according to the present embodiment, and FIG. 11 is a plan view of FIG. 10 viewed from the upper side , and FIG. 12 is a plan view illustrating a driving magnet, a first sensing unit, and related driving of a lens driving device according to a modified example.

The lens driving device may be a voice coil motor (VCM).

The lens driving device may include a cover 100 . The cover 100 may be coupled to the base 430 . The cover 100 may accommodate the housing 310 inside or inside. The cover 100 may form the exterior of the lens driving device. The cover 100 may have a hexahedral shape with an open lower surface. The cover 100 may be a non-magnetic material. The cover 100 may be formed of a metal material. The cover 100 may be formed of a metal plate. The cover 100 may be connected to the ground portion of the printed circuit board. Through this, the cover 100 may be grounded. The cover 100 may block electromagnetic interference (EMI). In this case, the cover 100 may be referred to as an 'EMI shield can'.

The cover 100 may include a top plate 110 and a side plate 120 . The cover 100 may include a top plate 110 and a side plate 120 extending downward from an outer periphery or edge of the top plate 110 . The lower end of the side plate 120 of the cover 100 may be disposed on the step portion 434 of the base 430 . The inner surface of the side plate 120 of the cover 100 may be coupled to the base 430 by an adhesive.

The upper plate 110 of the cover 100 may include a through hole 111 . The through hole 111 may be formed in the upper plate 110 of the cover 100 . The through hole 111 may expose the lens to the image side. The through hole 111 may be formed in a size and shape corresponding to that of the lens. The size of the through hole 111 may be formed to be larger than the diameter of the lens module so that the lens module can be inserted and assembled through the through hole 111 . The light introduced through the through hole 111 may pass through the lens. In this case, the light passing through the lens may be converted into an electrical signal by the image sensor and acquired as an image.

The lens driving device may include the first mover 200 . The first mover 200 may be coupled to a lens. The first mover 200 may be coupled to the second mover 300 through the elastic member 500 . The first mover 200 may move through interaction with the second mover 300 . In this case, the first mover 200 may move integrally with the lens. Meanwhile, the first mover 200 may move during AF driving. In this case, the first mover 200 may be referred to as an 'AF mover'. However, the first mover 200 may move even when the OIS is driven.

The first mover 200 may include a bobbin 210 . The bobbin 210 may be disposed inside or inside the housing 310 . The bobbin 210 may be disposed in the through hole 311 of the housing 310 . The bobbin 210 may be movably coupled to the housing 310 . The bobbin 210 may move in the optical axis direction with respect to the housing 310 . A lens may be coupled to the bobbin 210 . The bobbin 210 and the lens may be coupled by screws and/or adhesives. The AF driving coil 220 may be coupled to the bobbin 210 . An upper elastic member 510 may be coupled to the upper surface of the bobbin 210 . A lower elastic member 520 may be coupled to a lower surface of the bobbin 210 . The bobbin 210 may be coupled to the elastic member 500 by heat sealing and/or adhesive. The adhesive bonding the bobbin 210 and the lens, and the bobbin 210 and the elastic member 500 may be an epoxy that is cured by at least one of ultraviolet rays (UV), heat, and a laser.

The bobbin 210 may include a through hole 211 . The through hole 211 may pass through the bobbin 210 in the optical axis direction. A lens module may be accommodated in the through hole 211 . For example, a thread corresponding to a thread formed on an outer peripheral surface of the lens module may be disposed on an inner peripheral surface of the bobbin 210 forming the through hole 211 .

The bobbin 210 may include a driving unit coupling unit 212 . The AF driving coil 220 may be coupled to the driving unit coupling unit 212 . The driving unit coupling part 212 may be disposed on the outer peripheral surface of the bobbin 210 . The driving unit coupling part 212 may include a groove formed by recessing a portion of the outer surface of the bobbin 210 . In this case, the AF driving coil 220 may be accommodated in the groove of the driving unit coupling part 212 . The driving part coupling part 212 may be integrally formed with the outer peripheral surface of the bobbin 210 .

The first mover 200 may include an AF driving coil 220 . The AF driving coil 220 may be disposed on the bobbin 210 . The AF driving coil 220 may be disposed between the bobbin 210 and the housing 310 . The AF driving coil 220 may be disposed on the outer peripheral surface of the bobbin 210 . The AF driving coil 220 may be wound directly on the bobbin 210 . Alternatively, the AF driving coil 220 may be coupled to the bobbin 210 in a straight wound state. The AF driving coil 220 may face the driving magnet 320 . The AF driving coil 220 may electromagnetically interact with the driving magnet 320 . In this case, when a current is supplied to the AF driving coil 220 to form an electromagnetic field around the AF driving coil 220 , the AF driving coil is caused by electromagnetic interaction between the AF driving coil 220 and the driving magnet 320 . 220 is movable with respect to the drive magnet 320 . The AF driving coil 220 may be a single coil integrally formed.

The AF driving coil 220 may include a pair of lead wires for supplying power. At this time, one end (leading wire) of the AF driving coil 220 is coupled to the fifth upper elastic unit 505 and the other end (leading out) of the AF driving coil 220 is the sixth upper elastic unit 506 and can be combined. That is, the AF driving coil 220 may be electrically connected to the upper elastic member 510 . In more detail, the AF driving coil 220 may be sequentially supplied with power through the printed circuit board, the substrate 410 , the support member 600 , and the upper elastic member 510 . As a modification, the AF driving coil 220 may be electrically connected to the lower elastic member 520 .

The lens driving device may include the second mover 300 . The second mover 300 may be movably coupled to the stator 400 through the support member 600 . The second mover 300 may support the first mover 200 through the elastic member 500 . The second mover 300 may move the first mover 200 or move together with the first mover 200 . The second mover 300 may move through interaction with the stator 400 . The second mover 300 may move when the OIS is driven. In this case, the second mover 300 may be referred to as an 'OIS mover'. The second mover 300 may move integrally with the first mover 200 when the OIS is driven.

The second mover 300 may include a housing 310 . The housing 310 may be disposed outside the bobbin 210 . The housing 310 may accommodate at least a portion of the bobbin 210 therein. The housing 310 may be disposed inside or inside the cover 100 . The housing 310 may be disposed between the cover 100 and the bobbin 210 . The housing 310 may be formed of a material different from that of the cover 100 . The housing 310 may be formed of an insulating material. The housing 310 may be formed of an injection-molded material. The outer side of the housing 310 may be spaced apart from the inner surface of the side plate 120 of the cover 100 . Through the space between the housing 310 and the cover 100 , the housing 310 may move for OIS operation. A driving magnet 320 may be disposed in the housing 310 . The housing 310 and the driving magnet 320 may be coupled by an adhesive. An upper elastic member 510 may be coupled to the upper surface of the housing 310 . A lower elastic member 520 may be coupled to a lower surface of the housing 310 . The housing 310 may be coupled to the elastic member 500 by heat sealing and/or adhesive. The adhesive bonding the housing 310 and the driving magnet 320 and the housing 310 and the elastic member 500 may be an epoxy cured by any one or more of ultraviolet rays (UV), heat, and a laser. . The housing 310 may include a support portion formed in a shape corresponding to the groove portion 330 to support the groove portion 330 .

The housing 310 may include four side portions 310a and four corner portions 310b disposed between the four side portions 310a. The housing 310 may include a first side portion, a second side portion, and a first corner portion disposed between the first side portion and the second side portion. The housing 310 may include a third side portion disposed opposite the first side portion, a fourth side portion disposed opposite the second side portion, and a second corner portion disposed between the third side portion and the fourth side portion. .

The housing 310 may include a through hole 311 . The through hole 311 may be formed in the housing 310 . The through hole 311 may be formed to pass through the housing 310 in the optical axis direction. A bobbin 210 may be disposed in the through hole 311 . The through hole 311 may be formed in a shape corresponding to the bobbin 210 at least in part. The inner peripheral surface of the housing 310 forming the through hole 311 may be spaced apart from the outer peripheral surface of the bobbin 210 . However, at least a portion of the housing 310 and the bobbin 210 overlap in the optical axis direction to limit the movement stroke distance of the bobbin 210 in the optical axis direction.

The housing 310 may include a driving unit coupling part 312 . A driving magnet 320 may be coupled to the driving unit coupling unit 312 . The driving unit coupling part 312 may include a groove formed by partially recessing an inner peripheral surface and/or a lower surface of the housing 310 . The driving part coupling part 312 may be formed on each of the four side parts 310a of the housing 310 . As a modification, the driving part coupling part 312 may be formed in each of the four corner parts 310b of the housing 310 .

The second mover 300 may include a driving magnet 320 . The driving magnet 320 may be disposed in the housing 310 . The driving magnet 320 may be fixed to the housing 310 by an adhesive. The driving magnet 320 may be disposed between the bobbin 210 and the housing 310 . The driving magnet 320 may face the AF driving coil 220 . The driving magnet 320 may electromagnetically interact with the AF driving coil 220 . The driving magnet 320 may face the OIS driving coil 422 . The drive magnet 320 may electromagnetically interact with the OIS drive coil 422 . The driving magnet 320 may be commonly used for AF driving and OIS driving. The driving magnet 320 may be disposed on the side of the housing 310 . In this case, the driving magnet 320 may be a flat magnet having a flat plate shape. As a modification, the driving magnet 320 may be disposed at a corner of the housing 310 . In this case, the driving magnet 320 may be a corner magnet having a hexahedral shape in which an inner side surface is wider than an outer side surface.

The driving magnet 320 may include an inner surface 320a facing the first coil 220 and side surfaces 320c and 320d disposed on the corner portion 310b side of the housing 310 . The driving magnet 320 may include an outer surface 320b disposed opposite to the inner surface 320a. The side surfaces 320c and 320d of the driving magnet 320 are disposed on the opposite side of the first side surface 320c and the first side surface 320c disposed on the first corner part or the second corner part side of the housing 310 . It may include a second side (320d) that becomes. The size of the first side surface 320c of the driving magnet 320 may be smaller than the size of the inner surface 320a of the driving magnet 320 .

The driving magnet 320 may include a groove portion 330 disposed at a corner connecting the inner surface 320a and the first side surface 320c. In this case, the area of the inner surface 320a of the driving magnet 320 may be smaller than the area of the outer surface 320b of the driving magnet 320 . In this embodiment, since a part of the inner surface 320a of the driving magnet 320 is omitted by the groove portion 330 , the area of the inner surface 320a of the driving magnet 320 in which the groove portion 330 is formed and the area of the driving magnet 320 . When the area of the outer surface 320b is compared, the area of the inner surface 320a may be smaller than the area of the outer surface 320b. Also, the area of the first side surface 320c of the driving magnet 320 may be smaller than the area of the second side surface 320d of the driving magnet 320 . In this embodiment, since a part of the first side of the driving magnet 320 is omitted by the groove 330 , the area of the first side 320c of the driving magnet 320 in which the groove 330 is formed and the driving magnet 320 . Comparing the area of the second side surface 320d of , the area of the first side surface 320c may be smaller than the area of the second side surface 320d.

The driving magnet 320 may include first to fourth magnet units 321 , 322 , 323 , and 324 spaced apart from each other. The driving magnet 320 may include a first magnet unit 321 disposed on a first side of the housing 310 and a second magnet unit 322 disposed on a second side of the housing 310 . In this case, the first sensor 710 may be disposed in the first corner portion of the housing 310 . That is, the first sensor 710 may be disposed between the first magnet unit 321 and the second magnet unit 322 . However, the first sensor 710 may be disposed above the first magnet unit 321 and the second magnet unit 322 . The driving magnet 320 may include a third magnet unit 323 disposed on the third side of the housing 310 and a fourth magnet unit 324 disposed on the fourth side of the housing 310 .

The first magnet unit 321 may include a first groove 331 formed on the first corner portion of the housing 310 . The first magnet unit 321 may include a first groove 331 disposed at a corner connecting the inner surface 320a and the first side surface 320c. The area of the inner surface 320a of the first magnet unit 321 may be smaller than the area of the outer surface 320b of the first magnet unit 321 . The area of the first side surface 320c of the first magnet unit 321 may be smaller than the area of the second side surface 320d of the first magnet unit 321 .

The second magnet unit 322 may include a second groove 332 formed on the first corner portion of the housing 310 . The second magnet unit 322 may include a second groove 332 disposed at a corner connecting the inner surface 320a and the first side surface 320c. The area of the inner surface 320a of the second magnet unit 322 may be smaller than the area of the outer surface 320b of the second magnet unit 322 . An area of the first side surface 320c of the second magnet unit 322 may be smaller than an area of the second side surface 320d of the second magnet unit 322 .

The third magnet unit 323 may include a third groove 333 formed on the second corner portion of the housing 310 . The third magnet unit 323 may include a third groove 333 disposed at a corner connecting the inner surface 320a and the first side surface 320c. The area of the inner surface 320a of the third magnet unit 323 may be smaller than the area of the outer surface 320b of the third magnet unit 323 . The area of the first side surface 320c of the third magnet unit 323 may be smaller than the area of the second side surface 320d of the third magnet unit 323 .

The fourth magnet unit 324 may include a fourth groove 334 formed on the second corner portion of the housing 310 . The fourth magnet unit 324 may include a fourth groove 334 disposed at a corner connecting the inner surface 320a and the first side surface 320c. The area of the inner surface 320a of the fourth magnet unit 324 may be smaller than the area of the outer surface 320b of the fourth magnet unit 324 . An area of the first side surface 320c of the fourth magnet unit 324 may be smaller than an area of the second side surface 320d of the fourth magnet unit 324 .

The driving magnet 320 may include a groove portion 330 . The groove portion 330 may be disposed at a corner connecting the inner surface 320a and the first side surface 320c of the driving magnet 320 . In this embodiment, the inner surface 320a and the first side 320c of the driving magnet 320 are partially omitted by the groove portion 330, so the inner surface 320a and the first side 320c of the driving magnet 320 are omitted. The magnetic force distribution formed through the can be deformed. Through such a structure of the groove portion 330 , the influence of the driving magnet 320 on the AF feedback sensor 710 and/or the sensing magnet 730 may be minimized. The groove 330 may have any shape that minimizes the influence of the driving magnet 320 on the AF feedback sensor 710 and/or the sensing magnet 730 . The groove portion 330 may be formed in only one of the four lateral corners of the driving magnet 320 . Only one of the four lateral corners of the driving magnet 320 may have a different shape from the other three lateral corners. The driving magnet 320 may have an asymmetric shape. The groove portion 320 may extend from an upper surface to a lower surface of the driving magnet 320 in a predetermined shape. The groove portion 320 may be integrally formed with the driving magnet 320 .

The length of the groove 330 from the inner surface 320a of the driving magnet 320 (see L1 in FIG. 11 ) is the length from the first side 320c of the driving magnet 320 of the groove 330 (in FIG. 11 ). L2) may be smaller than The length L1 of the groove 330 from the inner surface 320a of the driving magnet 320 may be less than or equal to 1/2 of the thickness of the driving magnet 320 . The groove portion 330 may overlap with an imaginary straight line (see L of FIG. 11 ) extending perpendicular to the outer surface 320b of the driving magnet 320 from the end of the sensing magnet 730 . That is, the length L2 from the first side 320c of the driving magnet 320 of the groove 330 is longer than the distance between the imaginary straight line L from the first side 320c of the driving magnet 320 . can That is, the groove 330 is asymmetric based on a virtual corner where the virtual extension surface of the inner surface 320a of the driving magnet 320 and the virtual extension surface of the first side 320c of the driving magnet 320 meet. can As a modification, the length from the inner surface 320a of the driving magnet 320 of the groove part 330 may correspond to the length from the first side surface 320c of the driving magnet 320 of the groove part 330 . As another modification, the length from the inner surface 320a of the driving magnet 320 of the groove portion 330 may be greater than the length from the first side surface 320c of the driving magnet 320 of the groove portion 330 .

The groove portion 330 may include a plane 330a parallel to the inner surface 320a of the driving magnet 320 and a curved surface 330b connecting the plane 330a and the inner surface 320a of the driving magnet 321. have. In the present embodiment, the groove portion 330 may be formed as a curved surface 330b at least in part. The groove portion 330 may be formed by R-cut processing. The groove portion 330 may be formed as a round cut at a portion of the corner of the driving magnet 320 . A corner of the driving magnet 320 may have a basic curvature generated during edge processing. However, the curvature of the groove portion 330 may be different from the basic curvature generated during edge processing. That is, the shape of the groove portion 330 may be different from other corner shapes of the driving magnet 320 . The groove portion 330 may be formed by chamfering. The groove portion 330 may be formed by recessing a portion of the driving magnet 320 .

As a modification, the groove portion 330 may include an inclined surface 330c. The groove portion 330 may be formed by C-cut processing. The inclined surface 330c may form an obtuse angle with each of the inner surface 320a and the first side surface 320c of the driving magnet 320 . The inclined surface 330c may form a 135° angle with each of the inner surface 320a and the first side surface 320c of the driving magnet 320 . The inclined surface 330c may form 120° to 150° with each of the inner surface 320a and the first side surface 320c of the driving magnet 320 . As another modification, the groove portion 330 may be formed by a cut or a cut process. In this case, the inclined surface may include a plurality of inclined surfaces, and the plurality of inclined surfaces may each form 90° with the inner surface 320a and the first side surface 320c.

The groove portion 330 may be disposed in each of the four driving magnets 320 . The groove part 330 is disposed in the first groove 331 disposed in the first magnet unit 321 , the second groove 332 disposed in the second magnet unit 322 , and the third magnet unit 323 . It may include a third groove 333 that is formed, and a fourth groove 334 disposed in the fourth magnet unit 324 . The first to fourth grooves 331 , 332 , 333 , and 334 may have shapes corresponding to each other. The first and second grooves 331 and 332 may face each other. The third and fourth grooves 333 and 334 may face each other.

The first groove 331 may connect the first side and the second side of the first magnet unit 321 . At this time, the first side is a side disposed on the side of the first corner of the housing 310 in the first magnet unit 321 , and the second side is the AF coil 220 in the first magnet unit 321 . can be side. The first magnet unit 321 may further include a third side opposite to the first side and a fourth side opposite to the second side. At this time, the area of the second side of the first magnet unit 321 is smaller than the area of the fourth side of the first magnet unit 321 , and the area of the first side of the first magnet unit 321 is the first magnet unit It may be smaller than the area of the second side of 321 . This is a characteristic of the first groove 331 , and by this characteristic, in the present embodiment, the influence of the first magnet unit 321 on the AF feedback sensor 710 can be minimized.

The second groove 332 may connect the fifth side and the sixth side of the second magnet unit 322 . At this time, the fifth side is a side disposed on the side of the first corner of the housing 310 in the second magnet unit 322 , and the sixth side is the AF coil 220 in the second magnet unit 322 . can be side. The second magnet unit 322 may further include a seventh side opposite to the fifth side and an eighth side opposite to the sixth side. At this time, the area of the sixth side of the second magnet unit 322 is smaller than the area of the eighth side of the second magnet unit 322 , and the area of the fifth side of the second magnet unit 322 is the second magnet unit It may be smaller than the area of the seventh side of 322 . This is a characteristic due to the second groove 332 , and by this characteristic, in the present embodiment, the influence of the second magnet unit 322 on the AF feedback sensor 710 can be minimized.

The lens driving device may include a stator 400 . The stator 400 may be disposed below the first and second movers 200 and 300 . The stator 400 may movably support the second mover 300 . The stator 400 may move the second mover 300 . At this time, the first mover 200 may also move together with the second mover 300 .

The stator 400 may include a substrate 410 . The substrate 410 may include an OIS driving coil 422 facing the driving magnet 320 . The substrate 410 may be disposed on the base 430 . The substrate 410 may be disposed between the housing 310 and the base 430 . A support member 600 may be coupled to the substrate 410 . The substrate 410 may supply power to the OIS driving coil 422 . The substrate 410 may be coupled to the circuit member 420 . The substrate 410 may be coupled to the OIS driving coil 422 . The substrate 410 may be coupled to a printed circuit board disposed below the base 430 . The substrate 410 may include a flexible printed circuit board (FPCB). The substrate 410 may be bent in some parts.

The substrate 410 may include a body 411 . The substrate 410 may include a through hole 411a formed in the body portion 411 . The substrate 410 may include a through hole 411a corresponding to a lens coupled to the bobbin 210 .

The substrate 410 may include a terminal unit 412 . The terminal part 412 may extend from the body part 411 of the board 410 . The terminal unit 412 may be formed by bending a portion of the substrate 410 downward. At least a portion of the terminal part 412 may be exposed to the outside. The terminal unit 412 may be coupled to a printed circuit board disposed below the base 430 by soldering. The terminal part 412 may be disposed in the terminal receiving part 433 of the base 430 .

The stator 400 may include a circuit member 420 . The circuit member 420 may be disposed on the base 430 . The circuit member 420 may be disposed on the substrate 410 . The circuit member 420 may be disposed between the driving magnet 320 and the base 430 . Here, although the circuit member 420 is described as a configuration separate from the substrate 410 , the circuit member 420 may be understood as a configuration included in the substrate 410 .

The circuit member 420 may include a substrate part 421 . The substrate part 421 may be a circuit board. The substrate 421 may be an FPCB. The OIS driving coil 422 may be integrally formed on the substrate 421 as a fine pattern coil (FP coil). A hole through which the support member 600 passes may be formed in the substrate part 421 . The substrate part 421 may include a through hole 421a. The through hole 421a of the substrate part 421 may be disposed to correspond to the through hole 411a of the substrate 410 .

The circuit member 420 may include an OIS driving coil 422 . The OIS driving coil 422 may face the driving magnet 320 . The OIS drive coil 422 may electromagnetically interact with the drive magnet 320 . In this case, when a current is supplied to the OIS driving coil 422 to form a magnetic field around the OIS driving coil 422, the driving magnet ( 320 may move with respect to the OIS drive coil 422 . The OIS driving coil 422 may move the housing 310 and the bobbin 210 in a direction perpendicular to the optical axis with respect to the base 430 through electromagnetic interaction with the driving magnet 320 . The OIS driving coil 422 may be a fine pattern coil (FP coil) integrally formed on the substrate 421 .

The stator 400 may include a base 430 . The base 430 may be disposed below or below the housing 310 . The base 430 may be disposed below the substrate 410 . A substrate 410 may be disposed on the upper surface of the base 430 . The base 430 may be coupled to the cover 100 . The base 430 may be disposed on the upper side of the printed circuit board.

The base 430 may include a through hole 431 . The through hole 431 may be formed in the base 430 . The through hole 431 may be formed to pass through the base 430 in the optical axis direction. Light passing through the lens module through the through hole 431 may be incident on the image sensor. That is, the light passing through the lens module passes through the through hole 421a of the circuit member 420 , the through hole 411a of the substrate 410 and the through hole 431 of the base 430 to be incident on the image sensor. can

The base 430 may include a sensor coupling unit 432 . The OIS feedback sensor 900 may be disposed in the sensor coupling unit 432 . The sensor coupling unit 432 may accommodate at least a portion of the OIS feedback sensor 900 . The sensor coupling part 432 may include a groove formed by recessing the upper surface of the base 430 . The sensor coupling part 432 may include two grooves. In this case, the OIS feedback sensor 900 is disposed in each of the two grooves to detect the movement in the X-axis direction and the movement in the Y-axis direction of the driving magnet 320 .

The base 430 may include a terminal receiving part 433 . The terminal part 412 of the board 410 may be disposed in the terminal accommodating part 433 . The terminal accommodating part 433 may include a groove formed by partially recessing a side surface of the base 430 . The width of the terminal receiving portion 433 may be formed to correspond to the width of the terminal portion 412 of the substrate 410 . The length of the terminal receiving portion 433 may be formed to correspond to the length of the terminal portion 412 of the substrate 410 . Alternatively, since the length of the terminal portion 412 of the substrate 410 is greater than the length of the terminal receiving portion 433 , a portion of the terminal portion 412 may protrude below the base 430 .

The base 430 may include a stepped portion 434 . The stepped portion 434 may be formed on a side surface of the base 430 . The step portion 434 may be formed around the outer peripheral surface of the base 430 . The step portion 434 may be formed by protruding or recessing a portion of the side surface of the base 430 . The lower end of the side plate 120 of the cover 100 may be disposed on the stepped portion 434 .

The lens driving device may include an elastic member 500 . The elastic member 500 may be coupled to the bobbin 210 and the housing 310 . The elastic member 500 may elastically support the bobbin 210 . The elastic member 500 may have elasticity at least in part. The elastic member 500 may movably support the bobbin 210 . The elastic member 500 may support the movement of the bobbin 210 when the AF is driven. In this case, the elastic member 500 may be referred to as an 'AF support member'.

The elastic member 500 may include an upper elastic member 510 . The upper elastic member 510 may be disposed on the bobbin 210 . The upper elastic member 510 may be coupled to the bobbin 210 and the housing 310 . The upper elastic member 510 may be coupled to the upper surface of the bobbin 210 . The upper elastic member 510 may be coupled to the upper surface of the housing 310 . The upper elastic member 510 may be coupled to the support member 600 . The upper elastic member 510 may be formed of a leaf spring.

The upper elastic member 510 may include first to sixth upper elastic units 501, 502, 503, 504, 505, and 506 that are spaced apart from each other. The upper elastic member 510 may be used as a conductive line for supplying electricity to the AF feedback sensor 710 . The upper elastic member 510 may include first to fourth upper elastic units 501, 502, 503, and 504 that are spaced apart from each other. Each of the first to fourth upper elastic units 501 , 502 , 503 , and 504 may be coupled to the substrate 720 to which the AF feedback sensor 710 is coupled. The upper elastic member 510 and the substrate 710 may be coupled by soldering. The upper elastic member 510 may be used as a conductive line for supplying electricity to the AF driving coil 220 . The upper elastic member 510 may include a fifth upper elastic unit 505 and a sixth upper elastic unit 506 that are spaced apart from each other. The fifth upper elastic unit 505 may be coupled to one end of the AF driving coil 220 , and the sixth upper elastic unit 506 may be coupled to the other end of the AF driving coil 220 . The upper elastic member 510 and the AF driving coil 220 may be coupled by soldering.

The upper elastic member 510 may include an outer portion 511 . The outer part 511 may be coupled to the housing 310 . The outer part 511 may be coupled to the upper surface of the housing 310 . The outer portion 511 may include a hole or groove coupled to the protrusion of the housing 310 . The outer part 511 may be fixed to the housing 310 by an adhesive.

The upper elastic member 510 may include an inner portion 512 . The inner portion 512 may be coupled to the bobbin 210 . The inner part 512 may be coupled to the upper surface of the bobbin 210 . The inner portion 512 may include a hole or groove coupled to the protrusion of the bobbin 210 . The inner portion 512 may be fixed to the bobbin 210 by an adhesive.

The upper elastic member 510 may include a connection part 513 . The connection part 513 may connect the outer part 511 and the inner part 512 . The connecting portion 513 may elastically connect the outer portion 511 and the inner portion 512 . The connection part 513 may have elasticity. In this case, the connection part 513 may be referred to as an 'elastic part'. The connection part 513 may be formed by bending two or more times.

The upper elastic member 510 may include a coupling part 514 . The coupling part 514 may be coupled to the support member 600 . The coupling part 514 may be coupled to the support member 600 by soldering. The coupling part 514 may include a hole or groove coupled to the support member 600 . The coupling portion 514 may extend from the outer portion 511 . The coupling portion 514 may include a bent portion formed by bending.

The elastic member 500 may include a lower elastic member 520 . The lower elastic member 520 may be disposed below the bobbin 210 . The lower elastic member 520 may be coupled to the bobbin 210 and the housing 310 . The lower elastic member 520 may be coupled to the lower surface of the bobbin 210 . The lower elastic member 520 may be coupled to the lower surface of the housing 310 . The lower elastic member 520 may be formed of a leaf spring. The lower elastic member 520 may be integrally formed.

The lower elastic member 520 may include an outer portion 521 . The outer part 521 may be coupled to the housing 310 . The outer part 521 may be coupled to the lower surface of the housing 310 . The outer portion 521 may include a hole or groove coupled to the protrusion of the housing 310 . The outer part 521 may be fixed to the housing 310 by an adhesive.

The lower elastic member 520 may include an inner portion 522 . The inner portion 522 may be coupled to the bobbin 210 . The inner portion 522 may be coupled to the lower surface of the bobbin 210 . The inner portion 522 may include a hole or groove coupled to the protrusion of the bobbin 210 . The inner portion 522 may be fixed to the bobbin 210 by an adhesive.

The lower elastic member 520 may include a connection part 523 . The connecting portion 523 may connect the outer portion 521 and the inner portion 522 . The connecting portion 523 may elastically connect the outer portion 521 and the inner portion 522 . The connection part 523 may have elasticity. In this case, the connection part 523 may be referred to as an 'elastic part'. The connection part 523 may be formed by bending two or more times.

The lens driving device may include a support member 600 . The support member 600 may be coupled to the upper elastic member 510 and the substrate 410 . The support member 600 may be coupled to the upper elastic member 510 and the circuit member 420 of the substrate 410 . The support member 600 may movably support the housing 310 . The support member 600 may elastically support the housing 310 . The support member 600 may have elasticity at least in part. The support member 600 may support the movement of the housing 310 and the bobbin 210 when the OIS is driven. In this case, the support member 600 may be referred to as an 'OIS support member'. The support member 600 may be formed of a wire. As a modification, the support member 600 may be formed of a leaf spring.

The support member 600 may include a plurality of wires. The support member 600 may include six wires spaced apart from each other. The support member 600 may include first to sixth support parts 601 , 602 , 603 , 604 , 605 , and 606 spaced apart from each other. The first to sixth support portions 601, 602, 603, 604, 605, and 606 may be used as conductive lines in the lens driving device. The first to sixth supports 601 , 602 , 603 , 604 , 605 , and 606 may be coupled to the substrate 410 . The first support part 601 may be coupled to the first upper elastic unit 501 . The second support 602 may be coupled to the second upper elastic unit 502 . The third support part 603 may be coupled to the third upper elastic unit 503 . The fourth support 604 may be coupled to the fourth upper elastic unit 504 . The fifth support 605 may be coupled to the fifth upper elastic unit 505 . The sixth support part 606 may be coupled to the sixth upper elastic unit 506 .

The lens driving device may include a damper (not shown). The damper may be disposed on the support member 600 . The damper may be disposed on the support member 600 and the housing 310 . The damper may be disposed on the elastic member 500 . The damper may be disposed on the elastic member 500 and the bobbin and/or the elastic member 500 and the housing 310 . The damper may be disposed on the elastic member 500 and/or the support member 600 to prevent a resonance phenomenon occurring in the elastic member 500 and/or the support member 600 .

The lens driving device may include an AF feedback sensor unit 700 . The AF feedback sensor unit 700 may be provided for auto focus feedback. The AF feedback sensor unit 700 may detect a movement of the bobbin 210 in the optical axis direction. The AF feedback sensor unit 700 may detect the amount of movement in the optical axis direction of the bobbin 210 and provide it to the controller in real time.

The lens driving device may include an AF feedback sensor 710 . The AF feedback sensor unit 700 may include an AF feedback sensor 710 . The AF feedback sensor 710 may be disposed in the housing 310 . Alternatively, the AF feedback sensor 710 may be disposed on the bobbin 210 . The AF feedback sensor 710 may detect the movement of the first mover 200 . The AF feedback sensor 710 may include a Hall sensor. In this case, the Hall sensor may detect the movement of the bobbin 210 and the lens by sensing the magnetic force of the sensing magnet 730 . The detection value sensed by the AF feedback sensor 710 may be used for AF feedback control.

The AF feedback sensor unit 700 may include a substrate 720 . The substrate 720 may be disposed in the housing 310 . The substrate 720 may be coupled to the AF feedback sensor 710 . The substrate 720 may be electrically connected to the AF feedback sensor 710 . The substrate 720 may be coupled to the upper elastic member 510 . The substrate 720 may include four terminals coupled to the first to fourth upper elastic units 501 , 502 , 503 , and 504 . The substrate 720 and the upper elastic member 510 may be coupled by soldering. An AF feedback sensor 710 may be disposed on the substrate 720 . The AF feedback sensor 710 may be disposed on the inner surface of the substrate 720 . An imaginary extension surface of the inner surface of the substrate 720 may meet the first groove 331 or the second groove 332 . The distance between the AF feedback sensor 720 and the sensing magnet 730 may be shorter than the distance between the substrate 720 and the sensing magnet 730 .

The AF feedback sensor unit 700 may include a sensing magnet 730 . The sensing magnet 730 may be disposed on the bobbin 210 . The sensing magnet 730 may be detected by the AF feedback sensor 710 . The sensing magnet 730 may face the AF feedback sensor 710 . The sensing magnet 730 may be disposed at a corner of the bobbin 210 . That is, the sensing magnet 730 may be disposed to face the corner portion 310b of the housing 310 .

The lens driving device may include a compensation magnet 800 . The compensation magnet 800 may be disposed on the bobbin 210 . The compensation magnet 800 may be arranged to achieve magnetic force balance with the sensing magnet 730 . The compensation magnet 800 may be symmetrical with the sensing magnet 730 about the optical axis. The compensation magnet 800 may be disposed at a position corresponding to the sensing magnet 730 about the optical axis. The compensation magnet 800 may have a size and/or shape corresponding to that of the sensing magnet 730 about the optical axis. A sensing magnet 730 may be disposed on one side of the bobbin 210 and a compensation magnet 800 may be disposed on the other side of the bobbin 210 . The compensation magnet 800 may be disposed at a corner portion of the bobbin 210 . That is, the compensation magnet 800 may be disposed to face the corner portion 310b of the housing 310 .

The lens driving device may include an OIS feedback sensor 900 . The OIS feedback sensor 900 may be disposed on the base 430 and detect the driving magnet 320 . The OIS feedback sensor 900 may be disposed between the base 430 and the substrate 410 . The OIS feedback sensor 900 may detect the movement of the second mover 300 . The OIS feedback sensor 900 may include a Hall sensor. In this case, the Hall sensor may sense the magnetic force of the driving magnet 320 to detect the movement of the housing 310 and the driving magnet 320 . The sensed value sensed by the OIS feedback sensor 900 may be used for OIS feedback control.

Hereinafter, the operation of the camera module according to the present embodiment will be described.

An autofocus function of the camera module according to the present embodiment will be described. When power is supplied to the AF driving coil 220 , the AF driving coil 220 moves with respect to the driving magnet 320 by electromagnetic interaction between the AF driving coil 220 and the driving magnet 320 . . At this time, the bobbin 210 to which the AF driving coil 220 is coupled moves integrally with the AF driving coil 220 . That is, the bobbin 210 to which the lens module is coupled is moved in the optical axis direction with respect to the housing 310 . Since this movement of the bobbin 210 results in moving the lens module closer to or moving away from the image sensor, in this embodiment, power is supplied to the AF driving coil 220 to perform focus adjustment on the subject. it can be done Meanwhile, the aforementioned focus adjustment may be automatically performed according to the distance of the subject.

In the camera module according to the present embodiment, autofocus feedback control may be performed for more precise realization of the autofocus function. The AF feedback sensor 710 disposed on the housing 310 detects the magnetic field of the sensing magnet 730 disposed on the bobbin 210 . Accordingly, when the bobbin 210 moves relative to the housing 310 , the amount of the magnetic field sensed by the AF feedback sensor 710 is changed. The AF feedback sensor 710 detects the movement amount of the bobbin 210 in the optical axis direction or the position of the bobbin 210 in this way, and transmits the sensed value to the controller. The control unit determines whether to perform additional movement with respect to the bobbin 210 based on the received sensing value. Since this process occurs in real time, the autofocus function of the camera module according to the present embodiment can be performed more precisely through autofocus feedback control.

A camera shake correction function of the camera module according to the present embodiment will be described. When power is supplied to the OIS driving coil 422 , the driving magnet 320 moves with respect to the OIS driving coil 422 by electromagnetic interaction between the OIS driving coil 422 and the driving magnet 320 . . At this time, the housing 310 to which the driving magnet 320 is coupled moves integrally with the driving magnet 320 . That is, the housing 310 moves in a horizontal direction (a direction perpendicular to the optical axis) with respect to the base 430 . However, at this time, a tilt of the housing 310 with respect to the base 430 may be induced. Meanwhile, the bobbin 210 moves integrally with the housing 310 with respect to the horizontal movement of the housing 310 . Accordingly, such movement of the housing 310 results in movement of the lens module coupled to the bobbin 210 in a direction parallel to the direction in which the image sensor is placed with respect to the image sensor. That is, in the present embodiment, the hand shake correction function can be performed by supplying power to the OIS driving coil 422 .

In the camera module according to the present embodiment, the hand shake correction feedback control may be performed to more precisely realize the hand shake correction function. The OIS feedback sensor 800 disposed on the base 430 senses the magnetic field of the driving magnet 320 disposed on the housing 310 . Accordingly, when the housing 310 moves relative to the base 430 , the amount of the magnetic field sensed by the OIS feedback sensor 800 is changed. The pair of OIS feedback sensors 800 detect the amount or position of movement in the horizontal direction (x-axis and y-axis direction) of the housing 310 in this way, and transmit the sensed value to the control unit. The control unit determines whether to perform additional movement with respect to the housing 310 based on the received sensing value. Since such a process occurs in real time, the hand shake correction function of the camera module according to the present embodiment can be performed more precisely through the hand shake correction feedback control.

As a comparative example, a yoke (not shown) may be disposed between the driving magnets 320 and below the AF feedback sensor 710 in order to prevent magnetic field interference of the driving magnets 320 . Compared with the comparative example, this example omits the yoke part. In this embodiment, a groove 330 having a shape for minimizing magnetic field interference is added to the driving magnet 320 in order to minimize magnetic field interference due to the deletion of the yoke component. The groove 330 may be formed so that the driving magnet 320 is spaced apart from the sensing magnet 730 as far as possible. The simplification of the closed loop auto focus (CLAF) structure and process can be expected through the groove 330 . Accordingly, design freedom and cost reduction can be expected due to structural simplification.

In the above, even though it has been described that all the components constituting the embodiment of the present invention operate by being combined or combined into one, the present invention is not necessarily limited to this embodiment. That is, within the scope of the object of the present invention, all the components may operate by selectively combining one or more. In addition, terms such as 'include', 'comprise', or 'have' described above mean that the component may be inherent unless otherwise stated, so other components are excluded. Rather, it should be construed as being able to further include other components. All terms, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Terms commonly used, such as those defined in the dictionary, should be interpreted as being consistent with the contextual meaning of the related art, and are not interpreted in an ideal or excessively formal meaning unless explicitly defined in the present invention.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

100: cover 200: first mover
300: second mover 400: stator
500: elastic member 600: support member
700: AF feedback sensor unit 800: compensation magnet
900: OIS feedback sensor

Claims (20)

Base;
a housing disposed on the base;
a bobbin disposed within the housing;
a first magnet disposed on the housing;
a first coil disposed on the bobbin and interacting with the first magnet;
a second coil disposed on the base and interacting with the first magnet;
a second magnet disposed on the bobbin; and
A first sensor for detecting the second magnet,
The first magnet includes an inner surface facing the first coil, and an outer surface opposite to the inner surface,
An area of the inner surface of the first magnet is smaller than an area of the outer surface of the first magnet. According to claim 1,
In a direction perpendicular to the optical axis, a length of the inner surface of the first magnet is shorter than a length of the outer surface of the first magnet. According to claim 1,
In the optical axis direction, the length of the inner surface of the first magnet is equal to the length of the outer surface of the first magnet. According to claim 1,
The first magnet includes an upper surface and a lower surface connecting the inner surface and the outer surface, and a first side and a second side,
The first magnet includes a groove formed by depression of a corner region where the inner surface and the first side meet. 5. The method of claim 4,
The groove of the first magnet includes a plane connecting the inner surface of the first magnet and the first side surface of the first magnet obliquely. 5. The method of claim 4,
An area of the first side of the first magnet is smaller than an area of the second side of the first magnet. 5. The method of claim 4,
The groove of the first magnet is a lens driving device including a curved surface. According to claim 1,
a first substrate disposed on the base;
a second substrate disposed on the housing; and
A second sensor for detecting the first magnet,
The first sensor is disposed on the second substrate,
The second sensor and the second coil are disposed on the first substrate. According to claim 1,
the housing includes a first side, a second side, and a first corner portion disposed between the first side and the second side;
The first magnet includes a first magnet unit disposed on the first side of the housing and a second magnet unit disposed on the second side of the housing,
The first sensor is disposed in the first corner portion of the housing,
The first magnet unit includes a first groove formed on the side of the first corner, and the second magnet unit includes a second groove formed on the side of the first corner. 10. The method of claim 9,
and a second substrate on which the first sensor is disposed,
The first sensor is disposed on the inner surface of the second substrate,
The imaginary extension surface of the inner surface of the second substrate meets at least one of the first groove and the second groove. 11. The method of claim 10,
A distance between the first sensor and the second magnet is shorter than a distance between the second substrate and the second magnet. 10. The method of claim 9,
The housing includes a third side portion disposed opposite the first side portion, a fourth side portion opposite the second side portion, and a second corner portion disposed between the third side portion and the fourth side portion, ,
The first magnet includes a third magnet unit disposed on the third side portion, and a fourth magnet unit disposed on the fourth side portion,
The third magnet unit includes a third groove formed on the side of the second corner, and the fourth magnet unit includes a fourth groove formed on the side of the second corner. According to claim 1,
and a third magnet disposed on the bobbin and disposed opposite to the second magnet. housing;
a bobbin disposed within the housing;
a first magnet disposed on the housing;
a first coil disposed on the bobbin and interacting with the first magnet;
a second magnet disposed on the bobbin; and
A first sensor for detecting the second magnet,
The first magnet includes an inner surface facing the first coil, and an outer surface opposite to the inner surface,
An area of the inner surface of the first magnet is smaller than an area of the outer surface of the first magnet. 15. The method of claim 14,
In a direction perpendicular to the optical axis, a length of the inner surface of the first magnet is shorter than a length of the outer surface of the first magnet. 15. The method of claim 14,
In the optical axis direction, the length of the inner surface of the first magnet is equal to the length of the outer surface of the first magnet. 17. The method of claim 16,
The first magnet includes a groove formed in a corner area adjacent to the second magnet of the first magnet,
The groove of the first magnet includes a plane connecting the inner surface of the first magnet and the first side surface of the first magnet obliquely. printed circuit board;
an image sensor disposed on the printed circuit board;
The lens driving device of any one of claims 1 to 17, which is disposed on the printed circuit board; and
A camera module including a lens coupled to the bobbin of the lens driving device. main body;
The camera module of claim 18 disposed on the body; and
and a display disposed on the main body and outputting an image captured by the camera module. housing;
a bobbin disposed within the housing;
a first magnet disposed on the housing; and
and a first coil disposed on the bobbin and interacting with the first magnet.

Images