KR102467715B1 - Lens driving device and dual camera module - Google Patents

Abstract

This embodiment includes a first lens driving device and a second lens driving device including a second surface opposite to a first surface of the first lens driving device, wherein the first lens driving device includes a housing; bobbin; a first coil; magnet; Base; and a substrate including a second coil, wherein the housing includes a first side, a second side, a third side, and a fourth side, and the magnet is disposed on the second side of the housing. A first coil unit including a magnet, a second magnet disposed on a third side of the housing, and a third magnet disposed on a fourth side of the housing, wherein the second coil faces the first magnet; , a second coil unit facing the second magnet, and a third coil unit facing the third magnet, wherein the number of windings of the coil in the first coil unit is the number of windings of the coil in the second coil unit. It's more about dual camera modules.

Description

Lens driving device and camera module {Lens driving device and dual camera module}

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

The contents described below provide background information on the present embodiment, but do not describe the prior art.

As the spread of various portable terminals is widely generalized and wireless Internet services are commercialized, consumers' demands related to portable terminals are also diversifying, and various types of additional devices are being installed in portable terminals.

Among them, a typical example is a camera module that takes a picture or video of a subject. Meanwhile, recently, a dual camera module in which two camera modules are arranged side by side has been studied.

However, in the conventional dual camera module, there is a problem in that the distance between the camera modules is narrow, so that mutual magnetic field interference occurs.
(Patent Document 1) WO 2016-156996 A1

This embodiment is intended to provide a structure capable of excluding mutual interference between magnets in the structure of a lens driving device for dual OIS.

A dual camera module according to the present embodiment includes a first lens driving device and a second lens driving device including a second surface opposite to a first surface of the first lens driving device, wherein the first lens driving device includes: is a housing; a bobbin disposed inside the housing; a first coil disposed on the bobbin; a magnet disposed in the housing and facing the first coil; a base disposed below the housing; and a substrate including a second coil facing the magnet and disposed on the base, wherein the housing has a first side portion disposed on a first surface side of the first lens driving device and an opposite side of the first side portion. A second side part disposed on the housing, and a third side part and a fourth side part disposed between the first side part and the second side part and disposed opposite to each other, wherein the magnet is disposed on the second side part of the housing. A first coil unit including a first magnet, a second magnet disposed on a third side of the housing, and a third magnet disposed on a fourth side of the housing, wherein the second coil faces the first magnet. and a second coil unit facing the second magnet and a third coil unit facing the third magnet, wherein the number of times the coil is wound in the first coil unit is may be more than the number of times.

A dummy member including a non-magnetic material may be disposed on the first side of the housing.

The number of turns of the coil in the third coil unit may correspond to the number of turns of the coil in the second coil unit.

A central axis of the bobbin may be eccentric from a central axis of the first lens driving device toward the dummy member.

The substrate may include a through hole corresponding to a lens coupled to the bobbin, and the through hole may be disposed eccentrically toward a first surface of the first lens driving device.

The substrate includes a through hole, an inner circumferential surface formed by the through hole, a first side surface disposed on the side of the first side of the housing, and a second side surface disposed on the side of the second side of the housing, The first coil unit may be disposed between the inner circumferential surface of the substrate and the second side surface of the substrate, and the second coil may not be disposed between the inner circumferential surface of the substrate and the first side surface of the substrate.

The substrate has a first side surface disposed on the side of the first surface of the first lens driving device, a second side surface disposed opposite to the first side surface, and disposed between the first side surface and the second side surface and interact with each other. A third side surface and a fourth side surface disposed on opposite sides may be included, and a distance between the third side surface and the fourth side surface may be longer than a distance between the first side surface and the second side surface.

The second coil includes a first coil unit facing the first magnet, a second coil unit facing the second magnet, and a third coil unit facing the third magnet, A length of the unit in the longitudinal direction may be longer than lengths of each of the second coil unit and the third coil unit in the longitudinal direction.

The second lens driving device includes a housing; a bobbin disposed inside the housing of the second lens driving device; a first coil disposed on a bobbin of the second lens driving device; a magnet disposed in the housing of the second lens driving device and facing the first coil of the second lens driving device; a base disposed below the housing of the second lens driving device; and a substrate including a second coil facing the magnet of the second lens driving device and disposed on a base of the second lens driving device, wherein the magnet of the second lens driving device comprises a substrate of the second lens driving device. It may include four corner magnets disposed in four corner portions disposed between four sides of the housing.

A lens driving device according to this embodiment includes a housing; a bobbin disposed inside the housing; a first coil disposed on the bobbin; a magnet and a dummy member disposed in the housing and facing the first coil; a base disposed below the housing; and a substrate including a second coil facing the magnet and disposed on the base, wherein the housing includes a first side portion, a second side portion disposed on the opposite side of the first side portion, and the first side portion and the substrate. A third side part and a fourth side part disposed between the second side parts and disposed opposite to each other, wherein the dummy member is disposed on the first side of the housing, and the magnet is disposed on the second side of the housing. A first magnet, a second magnet disposed on a third side of the housing, and a third magnet disposed on a fourth side of the housing, wherein a central axis of the bobbin is directed from the central axis of the housing to the dummy member. It can be arranged eccentrically.

Mutual interference between magnets can be minimized in the structure of the lens driving device for dual OIS through this embodiment.

1 is a perspective view illustrating a dual camera module according to an exemplary embodiment.
2 is a perspective view showing a state in which the covers of the first lens driving device and the second lens driving device according to the present embodiment are removed.
3 is a perspective view showing a disposition structure of a magnet, a coil, and a dummy member of each of the first lens driving device and the second lens driving device according to the present embodiment.
4 is an exploded perspective view of the first lens driving device according to the present embodiment.
5 is an exploded perspective view of the first mover of the first lens driving device according to the present embodiment.
6 is an exploded perspective view of the second mover of the first lens driving device according to the present embodiment.
7 is an exploded perspective view of the stator of the first lens driving device according to the present embodiment.
8 is an exploded perspective view of the elastic member of the first lens driving device according to the present embodiment.
9 is a cross-sectional view of the first lens driving device according to the present embodiment.
10 is a cross-sectional view of a part of the first lens driving device according to the present embodiment.
11 is a plan view of a part of the first lens driving device according to the present embodiment.
12 is an exploded perspective view of the second lens driving device according to the present embodiment.
13 is a diagram illustrating a magnetic field distribution of a magnet of a dual camera module according to a comparative example.
14 is a diagram illustrating a magnetic field distribution of a magnet of a dual camera module according to an exemplary embodiment.
15 is a perspective view of an optical device according to the present embodiment.

Hereinafter, for convenience of description, some embodiments of the present invention will be described through exemplary drawings. However, the technical idea of the present invention is not limited to some of the described examples.

Also, terms such as first, second, A, B, (a), and (b) may be used to describe components of an embodiment of the present invention. These terms are only used to distinguish the component from other components, and the nature, order, or order of the corresponding component is not limited by the term.

When an element is described as being 'connected' or 'coupled' to another element, that element may be directly connected or coupled to the other element, but there is another element between the element and the other element. 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 a lens driving device. Meanwhile, the 'optical axis direction' may correspond to 'up and down directions' and 'z-axis directions'.

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

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

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

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

The optical device is any one of mobile phones, mobile phones, smart phones, portable smart devices, digital cameras, laptop computers, digital broadcasting terminals, personal digital assistants (PDA), portable multimedia players (PMPs), and navigation devices. can be However, the type of optical device is not limited thereto, and any device for taking a video or photo may be referred to as an optical device.

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

The optical device may include the display unit 2 . The display unit 2 may be disposed on one side of the main 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 main body 1 . At least a part of the camera module 3 may be accommodated inside the main body 1 . A plurality of camera modules 3 may be provided. The camera module 3 may be disposed on one surface of the body 1 and the other surface of the body 1, respectively. The camera module 3 may capture an image of a subject. In this embodiment, a dual camera module may be applied to the camera module 3 of the optical device.

Hereinafter, the configuration of the dual camera module according to the present embodiment will be described with reference to the drawings.

1 is a perspective view illustrating a dual camera module according to an exemplary embodiment.

The dual camera module may include a first camera module and a second camera module. The dual camera module may include a first lens driving device 1000 and a second lens driving device 2000 . The first camera module may include the first lens driving device 1000 . The second camera module may include the second lens framing device 2000 . In this embodiment, each of the first and second lens driving devices 1000 and 2000 may perform an auto focus function and/or a hand shake correction function. That is, in this embodiment, the first and second lens driving devices 1000 and 2000 may be an 'Optical Image Stabilization Module (OIS) module', an 'OIS actuator', or an 'AF actuator'. The dual camera module may include a first lens driving device 1000 including a first surface and a second lens driving device 2000 including a second surface opposite to the first surface. The first surface may be one surface of the cover 1100 of the first lens driving apparatus 1000 to be described later, and the second surface may be one surface of the cover 2100 of the second lens driving apparatus 2000 to be described later. The dual camera module may include first and second lens driving devices 1000 and 2000 disposed side by side on the printed circuit board 11 . In another embodiment, the printed circuit board 11 is separated, the first lens driving device 1000 is disposed on the first printed circuit board, and the second lens driving device 2000 is disposed on the second printed circuit board. have.

The dual camera module may include a lens module. A lens module may include at least one lens. A lens module may include a lens and a barrel. The lens module may include a first lens module coupled to the first lens driving device 1000 and a second lens module coupled to the second lens driving device 2000 . The first lens module may be coupled to the bobbin 1210 of the first lens driving device 1000 . The first lens module may be coupled to the bobbin 1210 by screwing and/or adhesive. The first lens module may move integrally with the bobbin 1210 . The second lens module may be coupled to the bobbin 2210 of the second lens driving device 2000 . The second lens module may be coupled to the bobbin 2210 by screwing and/or adhesive. The second lens module may move integrally with the bobbin 1210 .

The dual camera module 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. An infrared filter may be disposed between the lens module and the image sensor. The infrared filter may include a first infrared filter disposed under the lens coupled to the first lens driving device 1000 and a second infrared filter disposed under the lens coupled to the second lens driving device 2000. can For example, an infrared filter may be disposed on the sensor bases 12 and 13. Alternatively, infrared filters may be disposed on bases 1430 and 2430 .

The dual camera module may include a printed circuit board 11 . A first lens driving device 1000 and a second lens driving device 2000 may be disposed on the printed circuit board 11 . In this case, the first sensor base 12 may be disposed between the printed circuit board 11 and the first lens driving device 1000 . In addition, a second sensor base 13 may be disposed between the printed circuit board 11 and the second lens driving device 2000 . The printed circuit board 11 may be electrically connected to the first and second lens driving devices 1000 and 2000 . An image sensor may be disposed on the printed circuit board 11 . The printed circuit board 11 may be electrically connected to the image sensor.

The dual camera module may include an image sensor. The image sensor may be disposed on the printed circuit board 11 . The image sensor may be electrically connected to the printed circuit board 11 . As an example, the image sensor may be coupled to the printed circuit board 11 by surface mounting technology (SMT). As another example, the image sensor may be coupled to the printed circuit board 11 by flip chip technology. The image sensor may include a first image sensor disposed under a lens coupled to the first lens driving device 1000 and a second image sensor disposed under a lens coupled to the second lens driving device 2000. can The image sensor may be disposed such that an optical axis coincides with a lens. 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 onto an 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 dual camera module may include a control unit. The control unit may be disposed on the printed circuit board 11 . The control unit may individually control the direction, intensity, and amplitude of currents supplied to the first coil 1220 and the second coil 1422 of the first lens driving apparatus 1000 . The control unit may individually control the direction, strength, and amplitude of currents supplied to the first coil 2220 and the second coil 2422 of the second lens driving device 2000 . The controller may control the first and second lens driving devices 1000 and 2000 to perform an auto focus function and/or a hand shake correction function. Furthermore, the controller may perform autofocus feedback control and/or hand shake correction feedback control for the first and second lens driving devices 1000 and 2000 .

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

2 is a perspective view showing a state in which the covers of the first lens driving device and the second lens driving device according to the present embodiment are removed, and FIG. 3 is the first lens driving device and the second lens driving device according to the present embodiment. It is a perspective view showing the arrangement structure of each magnet, coil and dummy member, FIG. 4 is an exploded perspective view of the first lens driving device according to this embodiment, and FIG. 5 is a first lens driving device according to this embodiment. Fig. 6 is an exploded perspective view of the second mover of the first lens driving device according to the present embodiment, and Fig. 7 is an exploded perspective view of the stator of the first lens driving device according to the present embodiment. 8 is an exploded perspective view of the elastic member of the first lens driving device according to this embodiment, FIG. 9 is a cross-sectional view of the first lens driving device according to this embodiment, and FIG. 10 is the first lens driving device according to this embodiment. 11 is a plan view of a portion of a first lens driving device according to the present embodiment, FIG. 13 is a diagram showing magnetic field distribution of a magnet of a dual camera module according to a comparative example, and FIG. It is a diagram showing the magnetic field distribution of the magnets of the dual camera module according to the embodiment.

The first lens driving device 1000 may be a voice coil motor (VCM). Also, the first lens driving device 1000 may be an OIS or an OIS for dual OIS.

The first lens driving device 1000 may include a cover 1100 . The cover 1100 may be coupled to the base 1430 . The cover 1100 may accommodate the housing 1310 inside. The cover 1100 may form the exterior of the first lens driving device 1000 . The cover 1100 may have a hexahedral shape with an open lower surface. The cover 1100 may be a non-magnetic material. The cover 1100 may be formed of a metal material. The cover 1100 may be formed of a metal plate. The cover 1100 may be connected to the ground portion of the printed circuit board 11 . Through this, the cover 1100 may be grounded. The cover 1100 may block electromagnetic interference (EMI). In this case, the cover 1100 may be referred to as an 'EMI shield can'.

The cover 1100 may include a top plate 1110 and a side plate 1120 . The cover 1100 may include a top plate 1110 and a side plate 1120 extending downward from an outer periphery or edge of the top plate 1110 . The lower end of the side plate 1120 of the cover 1100 may be disposed on the stepped portion 1434 of the base 1430. The inner surface of the side plate 1120 of the cover 1100 may be coupled to the base 1430 by an adhesive.

The top plate 1110 of the cover 1100 may include a hole 1111 . The hole 1111 may be formed in the top plate 1110 of the cover 1100 . The hole 1111 may expose the lens upward. The hole 1111 may be formed in a size and shape corresponding to that of the lens. The size of the hole 1111 may be larger than the diameter of the lens module so that the lens module can be inserted and assembled through the hole 1111 . Light introduced through the hole 1111 may pass through the lens. In this case, the light passing through the lens may be converted into an electrical signal in the image sensor and obtained as an image.

The first lens driving device 1000 may include a first mover 1200 . The first mover 1200 may be combined with a lens. The first mover 1200 may be coupled to the second mover 1300 through the elastic member 1500 . The first mover 1200 may move through interaction with the second mover 1300 . At this time, the first mover 1200 may move integrally with the lens. Meanwhile, the first mover 1200 may move during AF driving. At this time, the first mover 1200 may be referred to as an 'AF mover'. However, the first mover 1200 can move even when the OIS is driven.

The first mover 1200 may include a bobbin 1210 . The bobbin 1210 may be disposed within or inside the housing 1310 . The bobbin 1210 may be disposed in the hole 1311 of the housing 1310. The bobbin 1210 may be movably coupled to the housing 1310 . The bobbin 1210 may move in the optical axis direction with respect to the housing 1310 . A lens may be coupled to the bobbin 1210 . The bobbin 1210 and the lens may be coupled by screwing and/or adhesive. A first coil 1220 may be coupled to the bobbin 1210 . An upper elastic member 1510 may be coupled to the upper or upper surface of the bobbin 1210 . A lower elastic member 1520 may be coupled to the lower or lower surface of the bobbin 1210 . The bobbin 1210 may be coupled to the elastic member 1500 by thermal fusion and/or adhesive. An adhesive combining the bobbin 1210 and the lens, and the bobbin 1210 and the elastic member 1500 may be an epoxy cured by at least one of ultraviolet (UV) light, heat, and laser.

The bobbin 1210 may include a hole 1211 . The hole 1211 may pass through the bobbin 1210 in the optical axis direction. A lens module may be accommodated in the hole 1211 . For example, a screw thread corresponding to a screw thread formed on an outer circumferential surface of the lens module may be formed on an inner circumferential surface of the bobbin 1210 forming the hole 1211 .

The bobbin 1210 may include a protrusion 1212 . The protrusion 1212 may be disposed on a side surface of the bobbin 1210 . The protrusion 1212 may protrude from the side surface of the bobbin 1210 and be integrally formed. A first coil 1220 may be wound around the protrusion 1212 . As a modified example, the first coil 1220 that has already been wound may be coupled to the protrusion 1212 . The protrusion 1212 may include a first protrusion and a second protrusion. The bobbin 1210 may include a first protrusion disposed on a first side surface of the bobbin 1210 and a second protrusion disposed on a second side surface opposite to the first side surface of the bobbin 1210 . Each of the first protrusion and the second protrusion may be separated into two protrusions. As a modified example, each of the first protrusion and the second protrusion may be formed in a straight line without separation. The first coil unit 1221 may be wound on the first protrusion. The second coil unit 1222 may be wound on the second protrusion.

The first mover 1200 may include a first coil 1220 . The first coil 1220 may be disposed on the bobbin 1210 . The first coil 1220 may be disposed between the bobbin 1210 and the housing 1310 . The first coil 1220 may be disposed on an outer circumferential surface of the bobbin 1210 . The first coil 1220 may be directly wound around the bobbin 1210 . The first coil 1220 may face the magnet 1320 . The first coil 1220 may interact with the magnet 1320 electromagnetically. In this case, when a current is supplied to the first coil 1220 and an electromagnetic field is formed around the first coil 1220, the first coil 1220 and the magnet 1320 by electromagnetic interaction 1220 may move relative to the magnet 1320 . The first coil 1220 may be one coil integrally formed.

The first coil 1220 may include both ends for power supply. At this time, one end (leader line) of the first coil 1220 is coupled to the first upper elastic unit (1510a), and the other end (leader line) of the first coil 1220 is coupled to the second upper elastic unit (1510b). can be combined That is, the first coil 1220 may be electrically connected to the upper elastic member 1510 . In more detail, the first coil 1220 may sequentially receive power through the printed circuit board 11 , the substrate 1410 , the support member 1600 and the upper elastic member 1510 . As a modified example, the first coil 1220 may be electrically connected to the lower elastic member 1520 .

The first coil 1220 may include a first coil unit 1221 and a second coil unit 1222 spaced apart from each other. The first coil 1220 may include a first coil unit 1221 facing the second magnet unit 1322 and a second coil unit 1222 facing the third magnet unit 1323 . The first coil unit 1221 and the second coil unit 1222 may be spaced apart from each other on opposite sides of the outer surface of the bobbin 1210 . The first coil unit 1221 may be wound around the first protrusion 1212 to cover upper and lower surfaces of the first protrusion 1212 . The first coil unit 1221 may be disposed by being inserted into the first protrusion 1212 , and the second coil unit 1222 may be disposed by being inserted into the second protrusion 1213 . The second coil unit 1222 may be wound around the second protrusion 1213 to cover upper and lower surfaces of the second protrusion 1213 . The first coil unit 1221 and the second coil unit 1222 may be referred to as 'glasses coils'. The first coil unit 1221 and the second coil unit 1222 are elliptical. It may have at least one of a track shape and a closed curve shape.

The first coil 1200 may not face the first magnet unit 1321 of the magnet 1320. More specifically, the first coil 1220 may face only the second magnet unit 1322 and the third magnet unit 1323 of the magnet 1320 and not the first magnet unit 1321 . The first coil unit 1221 is disposed to face the second magnet unit 1322, and the second coil unit 1222 is disposed to face the third magnet unit 1323, but the first magnet unit 1321 does not The division configuration of the opposing first coil 1220 may not be disposed.

The first coil 1220 may include a connection portion (not shown) electrically connecting the first coil unit 1221 and the second coil unit 1222 . The connection part of the first coil 1220 may be a connection coil (not shown). One end of the first coil unit 1221 and one end of the second coil unit 1222 may be connected to the connection part of the first coil 1220 . The connection part of the first coil 1220 may be disposed between the first coil unit 1221 and the second coil unit 1222 . The connection part of the first coil 1220 may face the first magnet unit 1321 . In another embodiment, the connection portion of the first coil 1220 may face the dummy member 1330 . The connection part of the first coil 1220 may be disposed between the first magnet unit 1321 and the bobbin 1210 or between the dummy member 1330 and the bobbin 1210 .

In this embodiment, the distance between the first coil unit 1221 and the second magnet unit 1322 and/or the distance between the second coil unit 1222 and the third magnet unit 1323 (see L1 in FIG. 11) may be 60 μm to 150 μm. The distance between the bobbin 1210 and the first magnet unit 1321 (refer to L2 in FIG. 11 ) may be 60 μm to 200 μm.

The first lens driving device 1000 may include a second mover 1300 . The second mover 1300 may be movably coupled to the stator 1400 through the support member 1600 . The second mover 1300 may support the first mover 1200 through the elastic member 1500 . The second mover 1300 may move the first mover 1200 or may move together with the first mover 1200 . The second mover 1300 may move through interaction with the stator 1400 . The second mover 1300 may move when the OIS is driven. At this time, the second mover 1300 may be referred to as an 'OIS mover'. The second mover 1300 may move integrally with the first mover 1200 when the OIS is driven.

The second mover 1300 may include a housing 1310 . The housing 1310 may be disposed outside the bobbin 1210 . The housing 1310 may house at least a portion of the bobbin 1210 in or inside. The housing 1310 may be disposed inside (inside) the cover 1100 . The housing 1310 may be disposed between the cover 1100 and the bobbin 1210 . The housing 1310 may be formed of a material different from that of the cover 1100 . The housing 1310 may be formed of an insulating material. The housing 1310 may be formed of an injection molding material. An outer side of the housing 1310 may be spaced apart from an inner surface of the side plate 1120 of the cover 1100 . Through the separation space between the housing 1310 and the cover 1100, the housing 1310 may move to drive the OIS. A magnet 1320 may be disposed in the housing 1310 . The housing 1310 and the magnet 1320 may be coupled by adhesive. An upper elastic member 1510 may be coupled to the top or upper surface of the housing 1310 . A lower elastic member 1520 may be coupled to an upper or lower surface of the housing 1310 . The housing 1310 may be coupled to the elastic member 1500 by thermal fusion and/or adhesive. An adhesive combining the housing 1310 and the magnet 1320 and the housing 1310 and the elastic member 1500 may be epoxy cured by at least one of ultraviolet (UV) light, heat, and laser.

The housing 1310 may include four side parts and four corner parts disposed between the four side parts. The housing 1310 is disposed between a first side portion disposed on the first surface side of the first lens driving device 1000, a second side portion disposed opposite the first side portion, and between the first side portion and the second side portion, It may include a third side part and a fourth side part disposed opposite to each other. The first side of the housing 1310 may be disposed on the first side of the first lens driving device 1000 . The housing 1310 may include four side parts, and the four sides may be arbitrarily referred to as a 'first side part' to a 'fourth side part' to distinguish them from each other. For example, unlike the foregoing description, the second side portion may be disposed on the side of the first surface of the first lens driving device 1000 .

The housing 1310 may include a hole 1311 . A hole 1311 may be formed in the housing 1310 . The hole 1311 may be formed to pass through the housing 1310 in the optical axis direction. A bobbin 1210 may be disposed in the hole 1311 . At least a part of the hole 1311 may be formed in a shape corresponding to that of the bobbin 1210 . An inner circumferential surface of the housing 1310 forming the hole 1311 may be spaced apart from an outer circumferential surface of the bobbin 1210 . However, the housing 1310 and the bobbin 1210 may overlap at least partially in the optical axis direction, thereby limiting the moving stroke distance of the bobbin 1210 in the optical axis direction.

The housing 1310 may include a magnet coupler 1312 . A magnet 1320 may be coupled to the magnet coupling part 1312 . The magnet coupler 1312 may include an accommodation groove formed by recessing a portion of an inner circumferential surface and/or a lower surface of the housing 1310 . The magnet coupling part 1312 may be formed on each of the four side parts of the housing 1310 . As a modified example, the magnet coupling part 1312 may be formed at each of four corner parts of the housing 1310 .

The housing 1310 may include a top plate 1313 . The housing 1310 may include a top plate 1313 disposed above the top surface of the magnet 1320 . The top plate 1313 may support the upper surface of the magnet 1320 . An adhesive may be disposed between the top plate 1313 and the magnet 1320 . The upper plate 1313 may be disposed above a part of the upper surface of the magnet 1320 . A stopper 1314 protruding toward the top plate 1110 of the cover 1100 may be disposed on the top plate 1313 . The top plate 1313 may be integrally formed with the housing 1310 . The stopper 1314 may be integrally formed with the top plate 1313 . The top plate 1313 may be disposed on the second side, the third side, and the fourth side of the housing 1310, respectively. That is, three top plates 1313 may be disposed on the housing 1310 . The top plate 1313 may not be disposed on the first side of the housing 1310 where the dummy member 1330 is disposed. The upper plate 1313 of the housing 1310 may be disposed on the second side, the third side, and the fourth side of the housing 1310, respectively, and may not be disposed on the first side of the housing 1310. That is, the top plate 1313 of the housing 1310 may not be disposed above the dummy member 1330 disposed on the first side of the housing 1310 . That is, the housing 1310 may be asymmetrical with respect to the central axis of the lens coupled to the bobbin 1210.

The housing 1310 may include a stopper 1314 . The stopper 1314 may be disposed on the top plate 1313. The stopper 1314 may be integrally formed with the top plate 1313 . Two stoppers 1314 may be provided for each top plate 1313 . That is, a total of six stoppers 1314 may be disposed in the housing 1310 . The two stoppers 1314 may be disposed at both ends of the top plate 1313, respectively. An upper surface of the stopper 1314 may form an upper end of the housing 1310 . The stopper 1314 may overlap the top plate 1110 of the cover 1100 in the optical axis direction. That is, when the housing 1310 continues to move upward, the top surface of the stopper 1314 comes into contact with the top plate 1110 of the cover 1100. Accordingly, the stopper 1314 may limit the upward movement distance of the housing 1310 .

The second mover 1300 may include a magnet 1320 . The magnet 1320 may be disposed in the housing 1310 . The magnet 1320 may be fixed to the housing 1310 by an adhesive. The magnet 1320 may be disposed between the bobbin 1210 and the housing 1310 . The magnet 1320 may face the first coil 1220 . The magnet 1320 may interact with the first coil 1220 electromagnetically. The magnet 1320 may face the second coil 1422 . The magnet 1320 may interact with the second coil 1422 electromagnetically. The magnet 1320 may be commonly used for AF driving and OIS driving. The magnet 1320 may be disposed on a side of the housing 1310 . In this case, the magnet 1320 may be a flat magnet having a flat plate shape. As a modified example, the magnet 1320 may be disposed at a corner portion of the housing 1310 . In this case, the magnet 1320 may be a corner magnet having a hexahedral shape with an inner side wider than an outer side.

In this embodiment, the upper surface of the magnet 1320 may include a first portion overlapping the upper elastic member 1510 in the optical axis direction. The first portion of the upper surface of the magnet 1320 may not overlap the housing 1310 in the optical axis direction. A first portion of the upper surface of the magnet 1320 may be exposed from the housing 1310 to face the upper elastic member 1510 . A first portion of the upper surface of the magnet 1320 may contact the upper elastic member 1510 . An upper surface of the magnet 1320 may include a second portion overlapping the housing 1310 in the optical axis direction. An upper plate 1313 of the housing 1310 may be disposed above the second part of the upper surface of the magnet 1320 . The second part of the top surface of the magnet 1320 may be coupled to the top plate 1313 of the housing 1310 . The second portion of the upper surface of the magnet 1320 may not overlap with the upper elastic member 1510 in the optical axis direction. The upper surface of the magnet 1320 may further include a third portion that does not overlap the housing 1310 and the upper elastic member 1510 in the optical axis direction. That is, the upper surface of the magnet 1320 includes a first portion overlapping the upper elastic member 1510 in the optical axis direction, a second portion overlapping the upper plate 1313 of the housing 1310, an upper elastic member 1510, and A third portion that does not overlap with all of the top plate 1313 of the housing 1310 may be included. However, the third part may not exist.

In this embodiment, the upper surface of the magnet 1320 may be disposed on the same plane as the upper surface of the housing 1310 to which the upper elastic member 1510 is coupled. For this structure, a part of the housing 1310 may be omitted in the present embodiment. That is, the structure can be described as a case where a part of the housing 1310 is omitted and the upper elastic member 1510 is disposed in the corresponding part. A portion of the upper surface of the magnet 1320 may contact the upper elastic member 1510 . Also, another part of the top surface of the magnet 1320 may contact the top plate 1313 of the housing 1310 .

The magnet 1320 may include a plurality of magnets spaced apart from each other. The magnet 1320 may include three magnets spaced apart from each other. The magnet 1320 may include first to third magnet units 1321, 1322, and 1323. The magnet 1320 includes a first magnet unit 1321 disposed on the second side of the housing 1310, a second magnet unit 1322 disposed on the third side of the housing 1310, and the housing 1310. A third magnet unit 1323 disposed on the fourth side may be included. The first magnet unit 1321 may face the first coil unit 1422a of the second coil 1422 . The second magnet unit 1322 may face the first coil unit 1221 of the first coil 1220 and the second coil unit 1422b of the second coil 1422 . The third magnet unit 1323 may face the second coil unit 1222 of the first coil 1220 and may face the third coil unit 1422c of the second coil 1422 . The second magnet unit 1322 and the third magnet unit 1323 may move the bobbin 1210 in the optical axis direction. The first magnet unit 1321 , the second magnet unit 1322 , and the third magnet unit 1323 may move the housing 1310 in a direction perpendicular to the optical axis direction.

The first magnet unit 1321 may be a 2 pole magnet. In this embodiment, the second magnet unit 1322 and the third magnet unit 1323 may be 4 pole magnets. The 2-pole magnet may be a 2-pole magnetized magnet, and the 4-pole magnet may be a 4-pole magnetized magnet. In this embodiment, magnetic field interference between the magnet 1320 of the first lens driving device 1000 and the magnet 2320 of the second lens driving device 2000 can be reduced through this. In the comparative example, the second magnet unit 1322 and the third magnet unit 1323 are provided as two-pole magnets. 13 is a diagram showing the magnetic field distribution of the comparative example. 14 is a diagram showing the magnetic field distribution of this embodiment. Comparing FIG. 14 with FIG. 13 , it can be seen that magnetic field interference between the magnet 1320 of the first lens driving device 1000 and the magnet 2320 of the second lens driving device 2000 is reduced or eliminated.

Each of the second magnet unit 1322 and the third magnet unit 1323 may include a first surface facing the first coil 1220 . The first surface may include a neutral portion 1324 disposed in a horizontal direction at the center. The neutral portion 1324 may be a neutral area and may not include a polarity. The first surface may have different polarities at the top and bottom of the neutral portion 1324 . That is, the upper side of the neutral portion 1324 may have an S pole, and the lower side of the neutral portion 1324 may have an N pole. As a modified example, the upper side of the neutral portion 1324 may have an N pole and the lower side of the neutral portion 1324 may have an S pole. The vertical length of the neutral portion 1324 (see L in FIG. 10 ) may be 0.1 mm to 0.5 mm.

Each of the first to third magnet units 1321, 1322, and 1323 may include a second surface facing the second coil 1422 and a third surface disposed opposite to the second surface. The second surface may be an inner side, which is the central side of the first lens driving device 1000, and the third surface may be an outer side opposite to the inner side. The second and third surfaces of the first to third magnet units 1321, 1322, and 1323 may have different polarities. That is, the second surface may have an N pole and the third surface may have an S pole. As a modified example, the second surface may have an S pole and the third surface may have an N pole.

The second mover 1300 may include a dummy member 1330 . A dummy member 1330 may be disposed on the first side of the housing 1310 . The dummy member 1330 may include a non-magnetic material. The dummy member 1330 may have a mass corresponding to that of the first magnet unit 1321 . The dummy member 1330 may be disposed at a position corresponding to the first magnet unit 1321 for weight balance. Alternatively, the magnetic strength of the dummy member 1330 may be weaker than that of the first magnet unit 1321 . The dummy member 1330 may be disposed on the opposite side of the first magnet unit 1321 to align the center of gravity. The dummy member 1330 may be a non-magnetic material. The dummy member 1330 may be made of 95% or more of tungsten. That is, the dummy member 1330 may be a tungsten alloy. For example, the specific gravity of the dummy member 1330 may be 18000 or more. An entire upper surface of the dummy member 1330 may be exposed from the housing 1310 . That is, the upper surface of the dummy member 1330 may not overlap or support the housing 1310 in the optical axis direction. The top plate 1313 of the housing 1310 may not be disposed above the dummy member 1330 . The second coil 1422 may not be disposed between the dummy member 1330 and the substrate 1410 .

The dummy member 1330 may include a shape to be assembled to the housing 1310 . The dummy member 1330 may include protrusions protruding in both directions. The dummy member 1330 may include a shape for avoiding interference with adjacent operating parts. The dummy member 1330 may include a groove formed at a portion where an upper surface and an inner surface meet. A length of the outer surface of the dummy member 1330 in a horizontal direction may be shorter than a length of the first magnet unit 1321 in a corresponding direction. A thickness of the dummy member 1330 may correspond to a thickness of the first magnet unit 1321 . Alternatively, the thickness of the dummy member 1330 may be larger or smaller than the thickness of the first magnet unit 1321 . The shape of the dummy member 1330 may be different from that of the first magnet unit 1321 . As a modified example, the shape of the dummy member 1330 may correspond to the shape of the first magnet unit 1321 . The dummy member 1330 may be disposed at the same height as the first magnet unit 1321 . Alternatively, the dummy member 1330 may be disposed higher or lower than the first magnet unit 1321 . An upper end of the dummy member 1330 may be disposed at the same height as an upper end of the first magnet unit 1321 . Alternatively, an upper end of the dummy member 1330 may be disposed higher or lower than an upper end of the first magnet unit 1321 . The lower end of the dummy member 1330 may be disposed at a height corresponding to that of the lower end of the first magnet unit 1321 . Alternatively, the lower end of the dummy member 1330 may be disposed higher or lower than the lower end of the first magnet unit 1321 . As shown in FIG. 3 , the dummy member 1330 may be disposed between the magnet 1320 of the first lens driving device 1000 and the magnet 2320 of the second lens driving device 2000 . The horizontal length of the dummy member 1330 may be equal to, shorter, or longer than the horizontal length of the first magnet unit 1321 . The vertical length of the dummy member 1330 may be equal to, shorter, or longer than the horizontal length of the first magnet unit 1321 .

The first lens driving device 1000 may include a stator 1400 . The stator 1400 may be disposed below the first and second movers 1200 and 1300 . The stator 1400 may movably support the second mover 1300 . The stator 1400 may move the second mover 1300 . At this time, the first mover 1200 can also move together with the second mover 1300.

The stator 1400 may include a substrate 1410 . The substrate 1410 may include a second coil 1422 facing the magnet 1320 . Alternatively, the substrate 1410 may include a circuit member 1420 including a second coil 1422 facing the magnet 1320 . Substrate 1410 may be disposed on base 1430 . The substrate 1410 may be disposed between the housing 1310 and the base 1430 . A support member 1600 may be coupled to the substrate 1410 . The substrate 1410 may supply power to the second coil 1422 . The substrate 1410 may be coupled to the circuit member 1420 . The substrate 1410 may be coupled to the second coil 1422 . The substrate 1410 may be coupled to the printed circuit board 11 disposed below the base 1430 . The substrate 1410 may include a flexible printed circuit board (FPCB). The substrate 1410 may be bent in part.

The substrate 1410 may include a body portion 1411 . The substrate 14100 may include a hole 1411a formed in the body portion 1411. The substrate 1410 may include a hole 1411a corresponding to a lens coupled to the bobbin 1210. The hole ( 1411a) may be disposed eccentrically toward the first surface of the first lens driving device 1000. In this embodiment, the number of turns of the first coil unit 1422a is increased through the eccentric arrangement structure of the hole 1411a. It is possible to secure a space for any one or more of the base 1430, the board 1410, and the circuit member 1420 for increasing the hole 1411a of the board 1410 is formed closer to one side of the board 1411. At this time, one side of the substrate 1410 may be adjacent to the dummy member 1330. The shortest distance from the other side opposite to the one side of the substrate 1410 to the hole 1411a is from one side to the other side. It may be greater than the shortest distance to the hole 1411a.

The substrate 1410 has a hole 1411a, an inner circumferential surface formed by the hole 1411a, a first side surface disposed on the side of the first side of the housing 1310, and a side disposed on the side of the second side of the housing 1310. It may include a second side that becomes. The distance between the inner circumferential surface of the substrate 1410 and the second side surface of the substrate 1410 (see W4 in FIG. 7 ) is the distance between the inner circumferential surface of the substrate 1410 and the first side surface of the substrate 1410 (see W3 in FIG. 7 ). ) can be longer. A first coil unit 1422a may be disposed between the inner circumferential surface of the substrate 1410 and the second side surface of the substrate 1410 . The second coil 1422 may not be disposed between the inner circumferential surface of the substrate 1410 and the first side surface of the substrate 1410 .

The substrate 1410 is disposed between a first side disposed on the first side of the first lens driving device 1000, a second side disposed opposite to the first side, and between the first side and the second side, It may include a third side and a fourth side disposed opposite to each other. In this case, the distance between the third side and the fourth side (see W1 in FIG. 7 ) may be longer than the distance between the first side and the second side (see W2 in FIG. 7 ). In this embodiment, the length L1 of the first coil unit 1422a in the longitudinal direction is formed longer than the lengths L2 of the second and third coil units 1422b and 1422c in the longitudinal direction through the aforementioned structure. space can be secured.

The substrate 1410 may include a terminal portion 1412 . The terminal portion 1412 is a substrate 1410?? It may extend from the body portion 1411. The terminal portion 1412 may be formed by bending a portion of the substrate 1410 downward. At least a portion of the terminal unit 1412 may be exposed to the outside. The terminal unit 1412 may be coupled to the printed circuit board 11 disposed below the base 1430 by soldering. The terminal unit 1412 may be disposed in the terminal accommodating unit 1433 of the base 1430 .

The substrate 1410 may include a circuit member 1420 . The stator 1400 may include a circuit member 1420 . The circuit member 1420 may be disposed on the base 1430 . The circuit member 1420 may be disposed on the substrate 1410 . The circuit member 1420 may be disposed between the magnet 1320 and the base 1430 . Here, although the circuit member 1420 is described as a component separate from the substrate 1410, the circuit member 1420 may be understood as a component included in the substrate 1410.

The circuit member 1420 may include a substrate portion 1421 . The substrate portion 1421 may be a circuit board. The substrate portion 1421 may be an FPCB. The second coil 1422 may be integrally formed as a fine pattern coil (FP coil) on the substrate portion 1421 . A hole through which the support member 1600 passes may be formed in the substrate portion 1421 . A hole 1421a may be formed in the substrate portion 1421 . The hole 1421a of the substrate 1421 may be formed to correspond to the hole 1411a of the substrate 1410 .

The circuit member 1420 may include a second coil 1422 . The second coil 1422 may face the magnet 1320 . The second coil 1422 may interact with the magnet 1320 electromagnetically. In this case, when current is supplied to the second coil 1422 and a magnetic field is formed around the second coil 1422, the magnet 1320 is formed by electromagnetic interaction between the second coil 1422 and the magnet 1320. may move with respect to the second coil 1422. The second coil 1422 may move the housing 1310 and the bobbin 1210 with respect to the base 1430 in a direction perpendicular to the optical axis through electromagnetic interaction with the magnet 1320 . The second coil 1422 may be a fine pattern coil (FP coil) integrally formed with the substrate portion 1421 .

The second coil 1422 includes a first coil unit 1422a facing the first magnet unit 1321, a second coil unit 1422b facing the second magnet unit 1322, and a third magnet unit ( 1323 and a third coil unit 1422c facing each other. The number of times the coil is wound in the first coil unit 1422a may be greater than the number of times the coil is wound in the second coil unit 1422b. The number of times the coil is wound in the third coil unit 1422c may correspond to the number of times the coil is wound in the second coil unit 1422b. In this embodiment, when the OIS is driven, movement in the X-axis direction may be performed through the first coil unit 1422a, and movement in the Y-axis direction may be performed through the second coil unit 1422b and the third coil unit 1422c. . Therefore, in this embodiment, the number of turns of the first coil unit 1422a is higher than the number of turns of the second coil unit 1422b and the third coil unit 1422c in order to compensate for the insufficient thrust in the X-axis direction. can For example, the ratio between the number of turns of the first coil unit 1422a and the number of turns of the second coil unit 1422b (or the third coil unit 1422c) may be 1.5:2.0 to 1:1. This is to compensate for the fact that the second coil 1422 is not disposed at a position facing the first coil unit 1422a. That is, the ratio between the number of turns of the first coil unit 1422a and the number of turns of the second coil unit 1422b (or the third coil unit 1422c) may be arranged up to 1.5:2.0 due to spatial constraints. The length in the longitudinal direction of the first coil unit 1422a (see L1 in FIG. 7 ) is longer than the lengths in the longitudinal direction of each of the second coil unit 1422b and the third coil unit 1422c (see L2 in FIG. 7 ). can The length of the first coil unit 1422a in the width direction (see L3 in FIG. 7 ) is longer than the lengths in the width direction of each of the second coil unit 1422b and the third coil unit 1422c (see L4 in FIG. 7 ). can

In this embodiment, the central axis of the lens coupled to the bobbin 1210 (see C1 in FIG. 9 ) extends from the central axis of the first lens driving device 1000 (see C2 in FIG. 9 ) toward the dummy member 1330 . It can be placed eccentrically. The central axis C1 of the bobbin 1210 may be eccentric from the central axis C2 of the housing 1310 toward the dummy member 1330 . In this case, the central axis C1 of the lens may coincide with the central axis C1 of the bobbin 1210 or the central axis of the hole 1311 of the housing 1310 . Also, the central axis C2 of the first lens driving device 1000 and the central axis C2 of the housing 1310 may coincide. In this case, the central axis C2 of the housing 1310 may not be the central axis of the hole 1311 of the housing 1310, but may be the central axis when viewed from the outside of the housing 1310 as a standard. Also, the hole 1411a may be disposed eccentrically toward the first surface of the first lens driving device 1000 . In this embodiment, the length L1 of the first coil unit 1422a in the longitudinal direction is formed longer than the lengths L2 of the second and third coil units 1422b and 1422c in the longitudinal direction through the aforementioned structure. space can be secured.

The stator 1400 may include a base 1430 . The base 1430 may be disposed below the housing 1310 . The base 1430 may be disposed below the substrate 1410 . A substrate 1410 may be disposed on an upper surface of the base 1430 . The base 1430 may be coupled to the cover 1100 . The base 1430 may be disposed on the upper side of the printed circuit board 11 .

The base 1430 may include a hole 1431 . A hole 1431 may be formed in the base 1430 . The hole 1431 may be formed to pass through the base 1430 in the optical axis direction. Light passing through the lens module through the hole 1431 may be incident to the image sensor. That is, the light passing through the lens module may pass through the hole 1421a of the circuit member 1420, the hole 1411a of the substrate 1410, and the hole 1431 of the base 1430 and may be incident to the image sensor.

The base 1430 may include a sensor coupler 1432 . A second sensor (not shown) may be disposed at the sensor coupling part 1432 . The sensor coupling part 1432 may accommodate at least a part of the second sensor. The sensor coupling part 1432 may include a groove formed by recessing the upper surface of the base 1430 . The sensor coupling part 1432 may include two grooves. At this time, a second sensor may be disposed in each of the two grooves to detect movement of the magnet 1320 in the X-axis direction and the Y-axis direction.

The base 1430 may include a terminal accommodating portion 1433 . The terminal portion 1412 of the substrate 1410 may be disposed in the terminal accommodating portion 1433 . The terminal accommodating portion 1433 may include a groove formed by recessing a portion of a side surface of the base 1430 inward. A width of the terminal accommodating portion 1433 may correspond to a width of the terminal portion 1412 of the board 1410 . The terminal accommodating portion 1433 may have a length corresponding to that of the terminal portion 1412 of the board 1410 .

The base 1430 may include a stepped portion 1434 . The stepped portion 1434 may be formed on a side surface of the base 1430 . The stepped portion 1434 may be formed around the outer circumferential surface of the base 1430 . The stepped portion 1434 may be formed by recessing an upper portion of a side surface of the base 1430 . Alternatively, the stepped portion 1434 may be formed by protruding from a lower portion of a side surface of the base 1430 . A lower end of the side plate 1120 of the cover 1100 may be disposed on the stepped portion 1434 .

The first lens driving device 1000 may include an elastic member 1500 . The elastic member 1500 may be coupled to the bobbin 1210 and the housing 1310. The elastic member 1500 may elastically support the bobbin 1210 . At least part of the elastic member 1500 may have elasticity. The elastic member 1500 may movably support the bobbin 1210 . The elastic member 1500 may support the movement of the bobbin 1210 during AF driving. In this case, the elastic member 1500 may be referred to as an 'AF support member'.

The elastic member 1500 may include an upper elastic member 1510 . The upper elastic member 1510 may be disposed above the bobbin 1210. The upper elastic member 1510 may be coupled to the bobbin 1210 and the housing 1310. The upper elastic member 1510 may be coupled to the upper surface of the bobbin 1210. The upper elastic member 1510 may be coupled to an upper surface of the housing 1310 . The upper elastic member 1510 may be coupled to the support member 1600 . The upper elastic member 1510 may be formed of a leaf spring.

The upper elastic member 1510 may be used as a conductive line for supplying electricity to the first coil 1220 . The upper elastic member 1510 may include a first upper elastic unit 1510a and a second upper elastic unit 1510b spaced apart from each other. The first upper elastic unit 1510a may be coupled to one end of the first coil 1220, and the second upper elastic unit 1510b may be coupled to the other end of the first coil 1220. The upper elastic member 1510 and the first coil 1220 may be coupled by soldering.

The upper elastic member 1510 may include an outer portion 1511 . The outer portion 1511 may be coupled to the housing 1310 . The outer portion 1511 may be coupled to an upper surface of the housing 1310 . The outer portion 1511 may include a hole or groove coupled to a protrusion of the housing 1310 . The outer portion 1511 may be fixed to the housing 1310 by an adhesive.

The upper elastic member 1510 may include an inner portion 1512 . The inner portion 1512 may be coupled to the bobbin 1210. The inner portion 1512 may be coupled to an upper surface of the bobbin 1210 . The inner portion 1512 may include a hole or groove coupled to the protrusion of the bobbin 1210 . The inner portion 1512 may be fixed to the bobbin 1210 by an adhesive.

The upper elastic member 1510 may include a connecting portion 1513. The connecting portion 1513 may connect the outer portion 1511 and the inner portion 1512 . The connecting portion 1513 may elastically connect the outer portion 1511 and the inner portion 1512 . The connecting portion 1513 may have elasticity. In this case, the connection part 1513 may be referred to as an 'elastic part'. The connecting portion 1513 may be formed by bending two or more times.

The upper elastic member 1510 may include a coupling part 1514 . The coupling portion 1514 may be coupled to the support member 1600 . The coupling portion 1514 may be coupled to the support member 1600 by soldering. The coupling portion 1514 may include a hole or groove coupled to the support member 1600 . The coupling portion 1514 may extend from the outer portion 1511 . The coupling part 1514 may include a bent part formed by bending.

The elastic member 1500 may include a lower elastic member 1520 . The lower elastic member 1520 may be disposed below the bobbin 1210 . The lower elastic member 1520 may be coupled to the bobbin 1210 and the housing 1310. The lower elastic member 1520 may be coupled to the lower surface of the bobbin 1210 . The lower elastic member 1520 may be coupled to the lower surface of the housing 1310 . The lower elastic member 1520 may be formed of a leaf spring. The lower elastic member 1520 may be integrally formed.

The lower elastic member 1520 may include an outer portion 1521 . The outer portion 1521 may be coupled to the housing 1310 . The outer portion 1521 may be coupled to a lower surface of the housing 1310 . The outer portion 1521 may include a hole or groove coupled to a protrusion of the housing 1310 . The outer portion 1521 may be fixed to the housing 1310 by an adhesive.

The lower elastic member 1520 may include an inner portion 1522 . The inner portion 1522 may be coupled to the bobbin 1210. The inner portion 1522 may be coupled to the lower surface of the bobbin 1210 . The inner portion 1522 may include a hole or groove coupled to the protrusion of the bobbin 1210 . The inner portion 1522 may be fixed to the bobbin 1210 by an adhesive.

The lower elastic member 1520 may include a connecting portion 1523 . The connection part 1523 may connect the outer part 1521 and the inner part 1522 . The connecting portion 1523 may elastically connect the outer portion 1521 and the inner portion 1522 . The connecting portion 1523 may have elasticity. In this case, the connection part 1523 may be referred to as an 'elastic part'. The connecting portion 1523 may be formed by bending two or more times.

The first lens driving device 1000 may include a support member 1600 . The support member 1600 may be a suspension wire. The support member 1600 may movably support the housing 1310 . The support member 1600 may elastically support the housing 1310 . At least a part of the support member 1600 may have elasticity. The support member 1600 may support the movement of the housing 1310 and the bobbin 1210 when the OIS is driven. At this time, the support member 1600 may be referred to as an 'OIS support member'. The support member 1600 may include a plurality of wires. The support member 1600 may include four wires spaced apart from each other. As a modified example, the support member 1600 may be formed of a leaf spring. The support member 1600 may be coupled to the upper elastic member 1510 and the substrate 1410 . The support member 1600 may be coupled to the upper elastic member 1510 and the circuit member 1420 of the substrate 1410 . The support member 1600 may be soldered to the lower surface of the substrate 1410 through a hole in the substrate 1410 . Alternatively, the support member 1600 may be soldered to the lower surface of the circuit member 1420 through a hole of the circuit member 1420 .

In the first lens driving device 1000 , a damper (not shown) may be disposed on the support member 1600 . The damper may be disposed on the support member 1600 and the housing 1310. The damper may be disposed on the elastic member 1500. The damper may be disposed on the elastic member 1500 and/or the support member 1600 to prevent a resonance phenomenon generated in the elastic member 1500 and/or the support member 1600 .

The first lens driving device 1000 may include a first sensor (not shown). The first sensor may be a sensor for AF feedback. The first sensor may be disposed on the bobbin 1210. As a modified example, the first sensor may be disposed in the housing 1310 . The first sensor may detect movement of the first mover 1200 . The first sensor may include a hall sensor. At this time, the hall sensor may sense the movement of the bobbin 1210 and the lens by sensing the magnetic force of the magnet 1320 or a separately provided magnet. A detection value detected by the first sensor may be used for AF feedback control.

The first lens driving device 1000 may include a second sensor. The second sensor may be a sensor for OIS feedback. The second sensor may be disposed between the base 1430 and the substrate 1410 . The second sensor may detect movement of the second mover 1300 . The second sensor may include a hall sensor. In this case, the hall sensor may detect the movement of the housing 1310 and the magnet 1320 by detecting the magnetic force of the magnet 1320 . A detection value sensed by the second sensor may be used for OIS feedback control.

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

12 is an exploded perspective view of the second lens driving device according to the present embodiment.

The second lens driving device 2000 may be a voice coil motor (VCM).

The second lens driving device 2000 may include a cover 2100 . The cover 2100 may accommodate the housing 2310 inside (inside). Cover 2100 may be coupled to base 2430 .

The second lens driving device 2000 may include a first mover 2200 . The first mover 2200 may move during AF driving.

The first mover 2200 may include a bobbin 2210 . The bobbin 2210 may be disposed inside (inside) the housing 2310 . The bobbin 2210 may be movably coupled to the housing 2310 by the elastic member 1500 .

The first mover 2200 may include a first coil 2220 . The first coil 2220 may be disposed on the bobbin 2210. The first coil 2220 may face the magnet 2320. Through the electromagnetic interaction between the first coil 2220 and the magnet 2320, the first mover 2200 can drive the AF.

The second lens driving device 2000 may include a second mover 2300 . The second mover 2300 may move when the OIS is driven. When the OIS is driven, the first mover 2200 can move together with the second mover 2300.

The second mover 2300 may include a housing 2310 . The housing 2310 may be disposed outside the bobbin 2210. The housing 2310 may accommodate the bobbin 2210 therein. The housing 2310 may be disposed between the bobbin 2210 and the cover 2100 .

The second mover 2300 may include a magnet 2320. The magnet 2320 may be disposed in the housing 2310 . The magnet 2320 may face the first coil 2220 . The magnet 2320 may face the second coil 2422 . The magnet 2320 may be disposed at four corner portions disposed between the four side portions of the housing 2310 . The magnet 2320 may include four corner magnets disposed at each of the four corner portions.

The second lens driving device 2000 may include a stator 2400 . The stator 2400 may movably support the second mover 2300 .

The stator 2400 may include a substrate 2410 . Substrate 2410 may be disposed on base 1430 . The substrate 2410 may be disposed between the housing 1310 and the base 1430 . The substrate 2410 may include a circuit member 2420 including a second coil 2422 facing the magnet 2320 . Substrate 2410 may be disposed on base 2430 .

The substrate 2410 may include a terminal portion 2412 . The substrate 2410 may include a terminal portion 2412 formed by partially bending the substrate 2410 . The terminal unit 2412 may be coupled to the printed circuit board 11 by soldering.

The substrate 2410 may include a circuit member 2420 . The circuit member 2420 may include a substrate portion and a second coil 2422 formed of a fine pattern coil (FP coil) on the substrate portion. The circuit member 2420 may include a second coil 2422 . The second coil 2422 may face the magnet 2320 . OIS driving may be performed by electromagnetic interaction between the second coil 2422 and the magnet 2320 .

The stator 2400 may include a base 2430 . The base 2430 may be disposed below the housing 2310 . The base 2430 may support the substrate 2410 .

The second lens driving device 2000 may include an elastic member 2500 . The elastic member 2500 may be coupled to the bobbin 2210 and the housing 2310. The elastic member 2500 may support the movement of the bobbin 2210 during AF driving. The elastic member 2500 may include an upper elastic member 2510 . The upper elastic member 2510 may be disposed on the upper side of the bobbin 2210 and coupled to the bobbin 2210 and the housing 2310. The elastic member 2500 may include a lower elastic member 2520 . The lower elastic member 2520 may be disposed below the bobbin 2210 and coupled to the bobbin 2210 and the housing 2310.

The second lens driving device 2000 may include a support member 2600 . The support member 2600 may movably support the second mover 2300 . The support member 2600 may be coupled to the upper elastic member 2510 and the substrate 2410 .

This embodiment intends to propose a structure capable of excluding mutual interference between magnets in a voice coil motor (VCM) structure.

In this embodiment, the magnet 1320 of the first lens driving device 1000 is composed of three magnets, two magnets may be 4-pole magnets and the remaining magnet may be a 2-pole magnet. Two first coils 1220 are circuit-connected in series and arranged to face each of the 4-pole magnets to provide driving force necessary for AF operation, and a second coil 1422 is arranged at the bottom of each magnet to provide a OIS can provide momentum. A dummy mass is disposed on the opposite side of the dipole magnetized magnet to align the center of gravity, thereby preventing oscillation due to eccentric weight during OIS operation.

With the mechanical configuration of this embodiment, the first coil 1220 is directly wound on two facing sides among the four sides of the bobbin 1210, and three magnets and a dummy member instead of four magnets can be assembled to the housing. In the Y direction, driving force is generated in the division configuration of two quadrupole magnetized magnets and a pair of second coils 1422, but in the X direction, driving force occurs only in the division configuration of one dipole magnetization magnet and one second coil 1422. Because of this, the driving force in the X direction is inevitably small. In order to solve this problem, in the present embodiment, the central axis of the lens (C1) is eccentric from the central axis of the product (C2) toward the dummy member 1330, and the remaining space on the side of the base 1430 in the direction of the two-pole magnet is utilized to make the second The driving force in the X direction is increased by increasing the number of turns of the coil 1422 .

In the case of using only a two-pole magnet as in the comparative example, the density of magnetic distribution with adjacent magnets increases, causing attractive or repulsive force between adjacent VCMs, which may cause difficulty in OIS control. The magnetic field distribution according to the comparative example is shown in FIG. 13 .

In this embodiment, an effect of reducing magnetic field interference between magnets of two lens driving devices can be obtained by applying a quadrupole magnetized magnet. This is shown in FIG. 14 . On the other hand, when the attractive or repulsive force between adjacent VCMs due to magnetic field interference is designed to be negligible through this embodiment, OIS control is possible ignoring the effect of magnetic field interference.

In this embodiment, the assembly surface of the upper elastic member 1510 and the magnet 1320 are formed by deleting the part constituting the injection minimum thickness of the housing 1310 that was in contact with the top surface of the magnet 1320 in the comparative example. It can be configured so that the upper surface of the match. In addition, in this embodiment, the upper elastic member 1510 is on the same plane as the assembly surface, but the upper elastic member 1510 does not pass by filling all the spaces with an injection material, so that the stopper 1314 is located in the outer portion of the housing ( The top plate 1313 of 1310 may be configured. When viewed from the top (when viewed from the top view state), in this embodiment, as shown in FIG. The magnet 1320 may be mechanically restrained by the top plate 1313 of the housing 1310 connected to the stopper 1314 of the housing 1310 . That is, through the present embodiment, it is possible to simultaneously secure the effect of mechanical restraint of the magnet 1320 and the effect of assembling the upper surface of the magnet 1320 upwardly.

In the above, even if all the components constituting the embodiment of the present invention are described as being combined or operated as one, the present invention is not necessarily limited to including all the components of the embodiment. That is, the present invention may include one or more of all the components of the embodiment and operate through these configurations. In addition, the term 'include' described above means that the corresponding component may be inherent unless otherwise stated, so it may further include other components in addition to the corresponding component rather than excluding other components. should be interpreted as having In addition, the term 'to be disposed' described above should be interpreted as a term that includes the case of being manufactured and disposed as a separate member and the case of being integrally manufactured and disposed.

The above description is merely an example of the technical idea of the present invention, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed according to the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

1000: first lens driving device 2000: second lens driving device

Claims (20)

Base;
a housing disposed on the base;
a bobbin disposed within the housing;
a first coil disposed on the bobbin;
a second coil disposed on the base;
a magnet disposed in the housing; and
And a dummy member disposed in the housing,
The housing includes a first side portion and a second side portion disposed opposite to each other, and a third side portion and a fourth side portion disposed opposite to each other,
The magnet includes a first magnet disposed on the first side of the housing, a second magnet disposed on the third side of the housing, and a third magnet disposed on the fourth side of the housing;
The first coil includes a first coil unit disposed between the bobbin and the second magnet, and a second coil unit disposed between the bobbin and the third magnet,
A coil interacting with the first magnet is not disposed between the bobbin and the first magnet,
The first magnet is a two-pole magnet,
Each of the second magnet and the third magnet is a 4-pole magnet. According to claim 1,
The second coil includes a first coil unit interacting with the first magnet, a second coil unit interacting with the second magnet, and a third coil unit interacting with the third magnet;
The number of times the coil is wound in the first coil unit of the second coil is greater than the number of times the coil is wound in the second coil unit of the second coil. According to claim 2,
The number of turns of the coil in the third coil unit of the second coil is equal to the number of turns of the coil in the second coil unit of the second coil. According to claim 2,
Including a substrate disposed on the base,
The second coil is disposed on the substrate,
The substrate has a hole, an inner circumferential surface formed by the hole, a first side surface disposed at a position corresponding to the first side portion of the housing, and a second side surface disposed at a position corresponding to the second side portion of the housing. including the side
A distance between the inner circumferential surface of the substrate and the first side surface of the substrate is longer than a distance between the inner circumferential surface of the substrate and the second side surface of the substrate. According to claim 2,
A length of the second coil in the longitudinal direction of the first coil unit is longer than a length of the second coil in the longitudinal direction of the second coil unit. According to claim 2,
A length of the second coil in the width direction of the first coil unit is longer than a length of the second coil in the width direction of the second coil unit. According to claim 1,
Each of the second magnet and the third magnet includes a first magnet part having an N pole and an S pole, a second magnet part having an N pole and an S pole, and disposed on the first magnet part; And a neutral part disposed between the second magnet part and having no polarity,
The lens driving device of claim 1 , wherein the first magnet part and the second magnet part are spaced apart from each other by the neutral part. According to claim 1,
And a dummy member disposed on the second side of the housing,
The dummy member has a magnetic strength weaker than that of the first magnet or includes a non-magnetic material. According to claim 8,
A lens driving device in which no coil is disposed between the bobbin and the dummy member. According to claim 8,
The dummy member has a mass corresponding to that of the first magnet. According to claim 8,
The dummy member is a lens driving device formed in a shape different from that of the first magnet. According to claim 1,
The bobbin moves in the optical axis direction by the interaction between the first coil and the magnet,
The bobbin and the housing move in a direction perpendicular to the optical axis direction by interaction between the second coil and the magnet. According to claim 1,
The first coil unit and the second coil unit have an elliptical shape. A lens driving device having at least one of a track shape and a closed curve shape. According to claim 1,
An upper elastic member disposed above the bobbin and coupled to the bobbin and the housing;
The upper elastic member electrically connects the first coil unit and the second coil unit to the lens driving device. Base;
a housing disposed on the base;
a bobbin disposed within the housing;
a first coil disposed on the bobbin;
a second coil disposed on the base;
a magnet disposed in the housing; and
And a dummy member disposed in the housing,
The housing includes a first side portion and a second side portion disposed opposite to each other, and a third side portion and a fourth side portion disposed opposite to each other,
The magnet includes a first magnet disposed on the first side of the housing, a second magnet disposed on the third side of the housing, and a third magnet disposed on the fourth side of the housing;
The first coil includes a first coil unit interacting with the second magnet and a second coil unit interacting with the third magnet,
In a direction perpendicular to the optical axis, no coil is disposed between the bobbin and the first magnet,
The first magnet is a two-pole magnet,
Each of the second magnet and the third magnet is a 4-pole magnet. According to claim 15,
The second coil includes a first coil unit interacting with the first magnet, a second coil unit interacting with the second magnet, and a third coil unit interacting with the third magnet;
The number of times the coil is wound in the first coil unit of the second coil is greater than the number of times the coil is wound in the second coil unit of the second coil. According to claim 15,
The dummy member is formed in a shape different from that of the first magnet,
Each of the second magnet and the third magnet includes a first magnet part having an N pole and an S pole, a second magnet part having an N pole and an S pole, and disposed on the first magnet part; And a neutral part disposed between the second magnet part and having no polarity,
The lens driving device of claim 1 , wherein the first magnet part and the second magnet part are spaced apart from each other by the neutral part. a first lens driving device according to any one of claims 1 to 17; and
A camera module including a second lens driving device adjacent to the first lens driving device. According to claim 18,
the second lens driving device is disposed adjacent to the dummy member of the first lens driving device;
The second lens driving device
Base;
a housing disposed on the base of the second lens driving device;
a bobbin disposed within the housing of the second lens driving device;
a third coil disposed on the bobbin of the second lens driving device;
a fourth coil disposed on the base of the second lens driving device; and
a magnet disposed in the housing of the second lens driving device;
The camera module of claim 1 , wherein the magnets of the second lens driving device include four magnets disposed at corner portions of the housing of the second lens driving device. main body;
The camera module of claim 18 disposed on the main body; and
An optical device comprising a display disposed on the main body and outputting an image captured by the camera module.

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