KR102330672B1 - Lens moving unit - Google Patents

Abstract

In the embodiment, a housing supporting a first coil, a bobbin supporting a magnet and moving in a first direction parallel to an optical axis inside the housing by electromagnetic interaction between the magnet and the first coil, the bobbin and the An elastic member coupled to the housing, a first circuit board electrically connected to the elastic member, a second circuit board disposed under the housing, a second coil disposed on the second circuit board, and the first circuit board and a support member electrically connecting the second circuit board to the second circuit board or electrically connecting the elastic member and the second circuit board.

Description

Lens drive unit {LENS MOVING UNIT}

The embodiment relates to a lens driving device.

A mobile phone or smart phone equipped with a camera module that captures a subject and stores it as an image or video is being developed. In general, the camera module may include a lens, an image sensor module, and a voice coil motor (VCM) for adjusting a distance between the lens and the image sensor module.

The camera module may be slightly shaken depending on the user's hand shake while photographing the subject, and a desired image or video cannot be captured due to the hand shake.

In order to correct image or video distortion caused by the user's hand shake, a voice coil motor to which an optical image stabilizer (OIS) function is added is being developed.

The embodiment provides a lens driving device capable of miniaturization and image correction in a free direction.

The lens driving device according to the embodiment includes a housing supporting a first coil, a bobbin supporting a magnet, and moving in a first direction parallel to an optical axis inside the housing by electromagnetic interaction between the magnet and the first coil , an elastic member coupled to the bobbin and the housing, a first circuit board electrically connected to the elastic member, a second circuit board disposed under the housing, a second coil disposed on the second circuit board, and and a support member electrically connecting the first circuit board and the second circuit board or electrically connecting the elastic member and the second circuit board.

The number of the support members may be plural, and the plurality of support members may be point-symmetric in second and third directions perpendicular to the first direction with respect to a center of the housing.

The first circuit board and the elastic member may be integrally formed.

The elastic member may include an upper elastic member coupled to an upper portion of the bobbin and an upper portion of the housing; and a lower elastic member coupled to a lower portion of the bobbin and a lower portion of the housing.

The first circuit board may include a first upper surface portion disposed on the upper elastic member; a first terminal surface bent from the first upper surface portion and having a plurality of first terminals; and a first pad disposed on the first upper surface portion and electrically connected to one end of the support member.

The second circuit board may include a second upper surface portion on which the second coil is disposed; and a second pad disposed on the second upper surface portion and electrically connected to the other end of the support member.

The housing may include an upper end on which the first circuit board is disposed; a plurality of support parts connected to the lower surface of the upper part and supporting the first coil; and a through groove formed in a corner of the upper end, wherein the support member may pass through the through groove.

The through-groove may include an opening that opens out of a side surface of the upper end of the housing, and the support member may be spaced apart from the through-groove.

The housing may include a first stopper protruding from an upper surface of the upper end, and the first circuit board may include a guide groove coupled to the first stopper.

The lens driving device may further include a first position sensor electrically connected to the first circuit board and configured to determine a first displacement value related to a change in position of the bobbin in the first direction.

The housing may further include a groove for a first position sensor on a side surface of the upper end, and the first position sensor may be disposed in the groove for the first position sensor.

The lens driving device may include a base disposed under the second circuit board and to which the plurality of supporting parts of the housing are fixed; and second and third position sensors electrically connected to the second circuit board and disposed on the upper surface of the base.

The bobbin may move in at least one of a second direction or a third direction perpendicular to the first direction inside the housing by electromagnetic interaction between the second coil and the magnet.

The first upper surface portion of the first circuit board includes one or more first corner regions, and the second upper surface portion of the second circuit board includes one or more second corner regions corresponding to the first corner regions, At least one of the plurality of support members is disposed between the first corner area and the corresponding second corner area, wherein the first corner area is preset from a corner of the first upper surface of the first circuit board. The area may be within a distance, and the second corner area may be an area within a predetermined distance from the second upper surface of the second circuit board.

The plurality of support members may include first support members that are point-symmetrical in the second direction with respect to the center of the housing; and second support members that are point-symmetrical in the third direction with respect to the center of the housing.

The number of the first support members and the number of the second support members may be different from each other.

The magnet may be commonly used for electromagnetic interaction with each of the first and second coils.

A lens driving device according to another embodiment includes a housing for supporting a first coil; Bobbin (Bobbin) for supporting the magnet; a first elastic member coupled to an upper portion of the bobbin and an upper portion of the housing; a second elastic member coupled to a lower portion of the bobbin and a lower portion of the housing; a first circuit board disposed on the first elastic member; a base disposed to be spaced apart from a lower portion of the housing; a second circuit board disposed on the base; a second coil disposed on the second circuit board and electrically connected to the second circuit board; and support members connected between the first elastic member and the base, wherein the bobbin is raised or lowered in a first direction parallel to the optical axis from an initial position by electromagnetic interaction between the magnet and the first coil. do.

A lower portion of the bobbin may be spaced apart from the second circuit board at the initial position.

One end of the support members may be bonded to the first circuit board, and the other end of the support members may be bonded to the second circuit board.

The lens driving device may include a first position sensor electrically connected to the first circuit board; and second and third position sensors electrically connected to the second circuit board.

The second circuit board may include terminals for a second coil electrically connected to the second coil; terminals for sensors electrically connected to the second and third position sensors; and terminals for the first circuit board electrically connected to the support members.

The embodiment can be miniaturized, and image correction is possible in a free direction.

1 is a schematic perspective view of a lens driving device according to an embodiment.
FIG. 2 is an exploded perspective view of the lens driving device shown in FIG. 1 .
FIG. 3 is a perspective view of the lens driving device of FIG. 1 with a cover member removed.
FIG. 4 is a perspective view of the bobbin shown in FIG. 2 .
FIG. 5 shows a first perspective view of the housing shown in FIG. 2 ;
FIG. 6 shows a second perspective view of the housing shown in FIG. 2 ;
7 is a rear perspective view of a housing in which a bobbin and a lower elastic member are coupled.
8 is a plan view of the upper elastic member shown in FIG. 2 .
9 is a perspective view of the first upper elastic member and the second upper elastic member mounted on the bobbin and the housing.
FIG. 10 is an enlarged perspective view of part A shown in FIG. 3 .
11 is a combined perspective view of a base, a circuit board, and a second coil shown in FIG. 2 .
12 is an exploded perspective view of the base, the circuit board, and the second coil shown in FIG. 11 .
13 is a plan view illustrating an electrical connection between a second coil and a circuit board.
14 is an exploded perspective view illustrating the base, the second circuit board, and the second coil shown in FIG. 2 .
15 is a perspective view of the first circuit board shown in FIG. 2 .
FIG. 16 is a cross-sectional view taken along line AB of the lens driving device shown in FIG. 3 .
FIG. 17 is a CD cross-sectional view of the lens driving device shown in FIG. 3 .
18 is a plan view of a lens driving device according to another exemplary embodiment.
19 is a perspective view of the lens driving device shown in FIG. 18 .
20 is a plan view of a lens driving apparatus according to another exemplary embodiment.
FIG. 21 is a perspective view of the lens driving device shown in FIG. 20 .
22 is a conceptual diagram illustrating auto-focusing and hand-shake correction of a lens driving apparatus according to an exemplary embodiment.
23 is a diagram illustrating a movement direction of a movable part according to control of second coils according to the first embodiment.
24 is a view showing a moving direction of the movable part according to the control of the second coils according to the second embodiment.
25 shows the position of the movable part according to the intensity of the current applied to the first coil.
26A to 26D show a driving algorithm for an auto-focusing operation.

Hereinafter, the embodiments will be clearly revealed through the accompanying drawings and the description of the embodiments. In the description of an embodiment, each layer (film), region, pattern or structure is “on” or “under” the substrate, each layer (film), region, pad or pattern. In the case of being described as being formed on, "on" and "under" include both "directly" or "indirectly" formed through another layer. do. In addition, the criteria for the upper / upper or lower / lower of each layer will be described with reference to the drawings.

In the drawings, sizes are exaggerated, omitted, or schematically illustrated for convenience and clarity of description. In addition, the size of each component does not fully reflect the actual size. Also, like reference numerals denote like elements throughout the description of the drawings.

An image stabilization device applied to a small camera module of a mobile device such as a smartphone or tablet PC is designed to prevent the outline of the captured image from being clearly formed due to the vibration caused by the user's hand shake when shooting a still image. means the device is configured.

Also, the auto-focusing device is a device for automatically focusing an image of a subject onto an image sensor surface. Such an image stabilization device and auto-focusing device can be configured in various ways. In the embodiment, an optical module composed of a plurality of lenses is moved in a direction parallel to the optical axis or is moved in a plane perpendicular to the optical axis. The same auto-focusing operation and image stabilization operation can be performed.

1 is a schematic perspective view of a lens driving device 10 according to an embodiment, FIG. 2 is an exploded perspective view of the lens driving device 10 shown in FIG. 1 , and FIG. 3 is a lens driving device ( 10) shows a perspective view with the cover member 300 removed, FIG. 16 is a cross-sectional view taken along AB of the lens driving device shown in FIG. 3 , and FIG. 17 is a CD cross-sectional view showing the lens driving device shown in FIG. 3 .

1 to 17 , a Cartesian coordinate system (x, y, z) may be used. In the drawing, the xy plane consisting of the x-axis and the y-axis means a plane perpendicular to the optical axis. For convenience, the optical-axis direction (z-axis direction) is the first direction, the x-axis direction is the second direction, and the y-axis direction is the third direction. can be defined as

1 to 3 and 16 to 17 , the lens driving device 10 includes a cover member 300, an upper elastic member 150, a bobbin 110, a first coil 120, and a housing ( 140 , the magnet 130 , the lower elastic member 160 , the elastic support members 220a to 220d , the first position sensor 180 , the second coil 230 , the second circuit board 250 , the base 210 . ) and second and third position sensors 240a and 240b.

The bobbin 110 , the first coil 120 , the magnet 130 , the housing 140 , the upper elastic member 150 , the lower elastic member 160 , and the elastic support members 220a to 220d drive the first lens. It may form the unit 100 , and may further include a first position sensor 180 . The first lens driving unit 100 may be for auto focus.

In addition, the first lens driving unit 100 , the second coil 230 , the second circuit board 250 , and the base 210 may form the second lens driving unit 200 , and also the first and second It may further include position sensors 240a and 240b. The second lens driving unit 200 may be used to correct hand shake.

First, the cover member 300 will be described.

The cover member 300 includes an upper elastic member 150, a bobbin 110, a first coil 120, a housing 140, a magnet 130, and a lower elastic member ( 160 , the elastic support members 220a to 220d , the second coil 230 , and the second circuit board 250 are accommodated.

The cover member 300 may have a box shape as a whole, and a lower portion of the cover member 330 may be coupled to an upper portion of the base 210 .

The cover member 300 may have an opening 310 on the upper surface for exposing a lens (not shown) coupled to the bobbin 110 to external light. In addition, a window made of a light-transmitting material may be provided in the opening 310 of the cover member 300 to prevent foreign substances such as dust or moisture from penetrating into the camera module.

Next, the bobbin 110 will be described.

The bobbin 110 is disposed inside the housing 140 to be described later, and is movable in a direction parallel to the optical axis, for example, a first direction.

Although not shown, the bobbin 110 may include a lens barrel (not shown) in which at least one lens is installed, but the lens barrel may be a configuration of a camera module to be described later, and a lens driving device ( 10) may not be required.

The lens barrel may be coupled to the inside of the bobbin 110 in various ways.

FIG. 4 is a perspective view of the bobbin 110 shown in FIG. 2 .

Referring to FIG. 4 , the bobbin 110 may have a structure having a hollow 101 for mounting a lens or a lens barrel. The shape of the hollow 101 may be determined by the shape of the lens or the lens barrel. For example, the hollow 101 may be circular, oval, or polygonal.

For example, the lens barrel may be coupled to the bobbin 110 by coupling the female thread 119 formed on the inner peripheral surface of the bobbin 110 and the male thread formed on the outer peripheral surface of the lens barrel. However, the present invention is not limited thereto, and the lens barrel may be directly fixed to the inside of the bobbin 110 by methods other than screw coupling. Alternatively, one or more lenses may be integrally formed with the bobbin 110 without a lens barrel.

The bobbin 110 may include at least one upper support protrusion 113 formed on the upper surface and at least one lower support protrusion 114 (refer to FIG. 7 ) formed on the lower surface.

The upper support protrusion 113 of the bobbin 110 may be coupled to the inner frame 151 of the upper elastic member 150 , whereby the bobbin 110 may be coupled and fixed to the upper elastic member 150 . .

The upper support protrusion 113 of the bobbin 110 may include a central protrusion 113a, a first upper protrusion 113b, and a second upper protrusion 113c.

The first upper protrusion 113b is disposed to be spaced apart from the central protrusion 113a by a first distance on one side of the central protrusion 113a, and the second upper protrusion 113c is central to the other side of the central protrusion 113a. It may be disposed to be spaced apart from the protrusion 113a by a second distance.

For example, the first distance and the second distance may be the same, and the first upper protrusion 113b and the second upper protrusion 113c may be symmetrically disposed with respect to the central protrusion 113a, but are limited thereto. It is not, and the upper elastic member 150 may be asymmetrical depending on the shape of the inner frame 151 .

Each of the central protrusion 113a, the first upper protrusion 113b, and the second upper protrusion 113c may have a prismatic shape, but is not limited thereto, and may be cylindrical in another embodiment.

The inner frame 151 of the upper elastic member 150 to be described later may be sandwiched between the central protrusion 113a and the first upper protrusion 113b, and between the central protrusion 113a and the second upper protrusion 113c. , thereby the inner frame 151 may be coupled to the upper portion of the bobbin. The upper support protrusion 113 and the inner frame 151 of the bobbin 110 may be fixed to each other by thermal fusion or an adhesive member such as epoxy.

Even if the bobbin 110 receives a force in the direction of rotation about the optical axis, the first upper protrusion 113b and the second upper protrusion 113c may serve as a stopper preventing the bobbin 110 from rotating. have.

The number of the upper support protrusions 113 of the bobbin 110 may be plural, and may be spaced apart from each other and disposed on the upper surface of the bobbin 110 .

When there are a plurality of upper support protrusions 113 of the bobbin 110 , the plurality of upper support protrusions 113 of the bobbin 110 may be disposed to be spaced apart from each other to avoid interference with surrounding components. For example, the upper support protrusions 113 may be arranged at regular intervals symmetrically with respect to an imaginary line passing through the center of the bobbin 110 . Alternatively, although the spacing between the adjacent upper support protrusions 113 is not constant, the upper support protrusions 113 may be disposed to be symmetrical with respect to an imaginary line passing through the center of the bobbin 110 .

The lower support protrusion 114 of the bobbin 110 may have a cylindrical shape or a prismatic shape, and there may be one or more. The lower support protrusion 114 of the bobbin 110 may be coupled to the inner frame 161 of the lower elastic member 160 , whereby the bobbin 110 may be coupled and fixed to the lower elastic member 150 . .

When there are a plurality of lower support protrusions 114 of the bobbin 110 , the lower support protrusions 114 of the bobbin 110 are symmetrically spaced or not uniformly spaced symmetrically with respect to an imaginary line passing through the center of the bobbin 110 . may be spaced apart.

A magnet seating groove 116 having a size corresponding to that of the magnet 130 may be provided between the upper and lower sides of the outer peripheral surface of the bobbin 110 .

The position of the magnet seating groove 116 may be provided on the outer peripheral surface of the bobbin 110 according to the arrangement position of the magnet 130 , and the number of the magnet seating groove 116 is as much as the number of magnets on the outer peripheral surface of the bobbin 110 . can be provided.

For example, four magnet seating grooves 116 spaced apart from each other may be provided on the outer circumferential surface of the bobbin 110 , and there may be two pairs of magnet seating grooves facing each other. Also, any pair of magnet seating grooves 116 facing each other and the other pair of magnet seating grooves may be orthogonal to each other.

The magnet seating groove 116 may be in the form of a groove consisting of a bottom and a side wall, and may have a structure in which a part of the side wall is opened. For example, the magnet seating groove 116 may be in the form of a groove in which the upper sidewall is opened so that the magnet 130 can be inserted, but is not limited thereto. In another embodiment, the magnet seating portion of the housing 140 has a part of the sidewall It may have a concave groove structure that is not open.

When the bobbin 110 moves in the first direction, in order to exclude spatial interference between the connection part 153 and the bobbin 110 of the upper elastic member 150 , and to facilitate elastic deformation of the connection part 153 , the upper side An upper escape groove 112 may be provided on the outer peripheral surface 110a corresponding to the connection part 153 of the elastic member 150 .

The upper escape groove 112 may be formed on the outer peripheral surface 110a of the bobbin 110 positioned between two adjacent magnet seating grooves. For example, the bobbin 110 may include four upper escape grooves 112 formed to be spaced apart from each other on the upper portion of the outer circumferential surface 110a.

In addition, when the bobbin 110 moves in the first direction, in order to exclude spatial interference between the connecting portion 163 of the lower elastic member 160 and the bobbin 110 , and to facilitate elastic deformation of the connecting portion 163 , A lower escape groove 118 may be provided at the lower portion of the outer circumferential surface corresponding to the connection portion 163 of the lower elastic member 160 .

The lower escape groove 118 may be formed under the outer peripheral surface 110a of the bobbin 110 positioned between two adjacent magnet seating grooves. For example, the bobbin 110 may include four lower escape grooves 118 formed to be spaced apart from each other under the outer circumferential surface 110a.

The outer peripheral surface 110a of the bobbin 110 positioned between two adjacent magnet seating grooves may be a curved surface convex from the center of the hollow 101 of the bobbin 110 to the outer peripheral surface of the bobbin 110 .

Next, the magnet 130 will be described.

The magnet 130 is disposed on the outer peripheral surface of the bobbin 110 so as to correspond to the first coil 120 to be described later. For example, the magnet 130 may be disposed in the magnet seating groove 116 of the bobbin 110 .

The magnet 130 may be fixed to the magnet seating groove 116 of the bobbin 110 using an adhesive member such as an adhesive or double-sided tape.

The number of magnets 130 may be one or more. For example, as shown in FIG. 2 , four magnets may be disposed on the outer circumferential surface of the bobbin 110 to be spaced apart from each other.

The magnet 130 may have a rectangular parallelepiped shape, but is not limited thereto, and may have a trapezoidal shape in another embodiment.

The magnet 130 may be disposed in the magnet seating groove 116 so that the wide side faces the outer circumferential surface of the bobbin 110 , and the magnets 130 facing each other may be disposed in parallel.

Also, the magnet 130 may be disposed to face the first coil 120 to be described later.

The opposite surfaces of the magnet 130 and the first coil 120 may be disposed to be parallel to each other. However, the present invention is not limited thereto, and any one of the facing surfaces of the magnet 130 and the first coil 120 may be flat, and the other may be formed of a curved surface. Alternatively, all of the facing surfaces of the first coil 120 and the magnet 130 may be curved surfaces, and in this case, the curvatures of the facing surfaces of the first coil 120 and the magnet 130 may be the same.

The magnet 130 and the first coil 120 may be configured to correspond to each other.

When the magnet 130 is configured as a single body and the entire surface facing the first coil 120 has the same polarity, the first coil 120 also has the same polarity as the surface corresponding to the magnet 130 . It can be configured to

For example, the magnet 130 may be disposed such that a surface facing the first coil 120 is an N pole, and a surface opposite to the N pole is an S pole. However, this is not limited thereto, and it is also possible to configure the polarity of the magnet 130 to be reversed.

In another embodiment, when the magnet 130 is divided into two planes perpendicular to the optical axis so that the surface facing the first coil 120 is divided into two or more, the first coil 120 is also divided into a magnet ( 130) and it is also possible to be divided into the corresponding number.

Next, the housing 140 will be described.

The housing 140 supports the first coil 120 and accommodates the bobbin 110 therein so as to move in a first direction parallel to the optical axis.

7 is a first perspective view of the housing 140 shown in FIG. 2 , FIG. 8 is a second perspective view of the housing 140 shown in FIG. 2 , and FIG. 9 is a bobbin 110 and a lower elastic member 160 . ) shows a rear perspective view of the coupled housing 140 .

7 to 9 , the housing 140 may have a hollow pillar shape as a whole. For example, the housing 140 may have a hollow 201 of a polygon (eg, a quadrangle or an octagon).

The housing 140 may include an upper end 710 having a hollow 201 , and a plurality of support portions 720 - 1 to 720 - 4 connected to a lower surface of the upper end 710 .

The support parts 720 - 1 to 720 - 4 are spaced apart from each other, and an opening 701 exposing the magnet 130 mounted on the outer circumferential surface of the bobbin 110 may be formed between two adjacent support parts.

The upper end 710 of the housing 140 may have a rectangular shape, and the plurality of support portions 720-1 to 720-4 may be disposed to be spaced apart from each other.

The support parts 720-1 to 720-4 of the housing 140 may have a prismatic shape, but are not limited thereto.

The housing 140 may include four support parts 720-1 to 720-4, and at least one pair of the support parts may be disposed to face each other.

For example, the support parts 720 - 1 to 720 - 4 of the housing 140 may be disposed to correspond to the escape grooves 112 and 118 of the bobbin 110 .

Also, for example, the support parts 720 - 1 to 720 - 4 of the housing 140 may be disposed to correspond to the outer peripheral surface 110a of the bobbin 110 positioned between two adjacent magnet seating grooves.

Also, for example, the support parts 720 - 1 to 720 - 4 of the housing 140 may be arranged to correspond to or align with each of the four corners of the upper end 710 .

The outer circumferential surface 730 of each of the supporting parts 720-1 to 720-4 of the housing 140 has a first side surface 730-1 parallel to the second direction, and a second side surface 730- parallel to the third direction. 2), and a third side surface 730 - 3 disposed between the first side surface and the second side surface. Each of the first to third side surfaces 720-1 to 720-3 may be planar.

A first angle formed by the third side surface 730-3 and the first side surface 730-1 of each of the supporting parts 720-1 to 720-4 of the housing 140, and the third side surface 730-3 A second angle formed by the second side surface 720 - 2 may be an obtuse angle, and the first angle and the second angle may be the same.

The area of the third side surface 730-3 of each of the supporting parts 720-1 to 720-4 of the housing 140 is larger than the area of each of the first and second side surfaces 730-1 and 730-2. may be, but is not limited thereto.

The inner peripheral surface 740 of each of the supporting parts 720-1 to 720-4 of the housing 140 may be a convex curved surface in the direction from the center of the hollow 201 of the housing 140 to the outer peripheral surface 730 of the housing 140. have.

In order to allow the bobbin 110 to easily move in the first direction within the housing 140 without interference of the housing 140 , the inner peripheral surface 740 of each of the support parts 720-1 to 720-4 of the housing 140 . ) may have a curved surface corresponding to or coincident with the curved surface of the outer peripheral surface of the bobbin.

In order to support the first coil 120, which will be described later, the supporting parts 720-1 to 720-4 of the housing 140 are stepped (stepped) protruding from the lower portions of the first and second side surfaces 720-1 and 720-2. 731 and 732) may be provided.

The housing 140 may include at least one first stopper 143 protruding from the upper surface to prevent collision with the cover member 300 . That is, the first stopper 143 of the housing 140 may prevent the upper end 710 of the housing 140 from directly colliding with the inner surface of the cover member 300 when an external shock occurs.

For example, the first stopper 143 may protrude from the upper surface of the upper end 710 of the housing 140 , and may be disposed to correspond to or aligned with the support portions 720-1 to 720-4 of the housing 140 . have.

The number of the first stoppers 143 may be plural, and the plurality of first stoppers may be disposed to be spaced apart from each other. For example, at least one pair of first stoppers may be disposed to face each other.

The first stopper 143 may have a cylindrical or polygonal column shape, and may be divided into two or more. For example, the first stopper 143 may be divided into two, and the divided two first stoppers 143a and 143b may be disposed to be spaced apart by a predetermined distance. In addition, the first stopper 143 of the housing 140 may serve to guide the installation position of the upper elastic member 150 .

The housing 140 may include at least one second stopper 146 protruding from a side surface of the upper end 710 in order to prevent a collision with the cover member 300 . That is, the second stopper 146 of the housing 140 may prevent the side surface of the upper end 710 of the housing 140 from directly collided with the inner surface of the cover member 300 when an external shock occurs.

The housing 140 may further include at least one upper frame support protrusion 144 protruding from the upper surface of the upper end 710 for coupling with the outer frame 152 of the upper elastic member 150 .

The number of the upper frame supporting protrusions 144 of the housing 140 may be plural, and the plurality of upper frame supporting protrusions 144 of the housing 140 are disposed on the upper surface of the upper end 710 of the housing 140 . They may be spaced apart.

For example, the upper support protrusion 144 may be spaced apart from the first stopper 143 and disposed adjacent to the edge of the housing 140 .

In addition, the housing 140 has at least one lower frame support protrusion 145 protruding from the lower surface of each of the support parts 720-1 to 720-4 for coupling with the outer frame 162 of the lower elastic member 160 . can be provided.

The lower frame support protrusion 145 may have a cylindrical or polygonal column shape, and may be aligned at the center of a lower surface of each of the support parts 720-1 to 720-4, but is not limited thereto. In another embodiment, the number of the lower frame support protrusions 145 of the housing 140 may be plural.

The upper end 710 of the housing 140 may be in contact with the hollow 201 and may include a buffer support 741 having an upper surface and a step d1. A damper to be described later may be disposed or applied to the buffer support 741 .

For example, the upper surface 740 of the upper end 710 of the housing 140 may include a buffer support 741 and an outer support 742 , and a step difference between the buffer support 741 and the outer support 742 . (d1) exists.

The outer support 742 is in contact with the side surface of the housing 140 , and may have a shape corresponding to or coincident with the outer frame 152 of the upper elastic member 150 , and may support the outer frame 152 of the upper elastic member 150 . can support

The buffer support 741 may be in the form of a groove recessed downward from the outer support 742 , and may have a step d1 with the outer support 742 .

The buffer support 741 is a first portion S1 positioned corresponding to each of the support parts 720-1 to 720-4 of the housing 140, and positioned to correspond to the bent part 151a of the upper elastic member. A second part S2 may be included.

The first portion S1 of the buffer support 741 may be vertically aligned with the connection portion 153 of the upper elastic member 150 and the upper escape groove 112 of the bobbin 110 .

In order to prevent an oscillation phenomenon when the bobbin 110 is moved, a damper may be applied between the buffer support 741 and the connection part 153 of the upper elastic member 150 .

The second portion S2 of the buffer support 741 may include an escape groove 750 for excluding spatial interference with the bent portion 151a of the inner frame 151 of the upper elastic member 150 . In order to avoid spatial interference, the length of the escape groove 750 may be the same as or longer than the length of the bent portion 151a.

The housing 140 may have a through-groove 751 through which the elastic support members 220a to 220d pass at a corner of a side surface of the upper end 710 .

The through groove 751 may have a groove structure recessed from the side surface of the upper end 710 of the housing 140 , but is not limited thereto, and in another embodiment, the upper surface and the lower portion of the upper end 710 of the housing 140 . It may be a hole structure penetrating the surface.

The through groove 751 may have a depth such that portions of the elastic support members 220a to 220d inserted into the through groove 751 are not exposed outside the side surface of the housing 140 . The through groove 751 may serve to guide or support the elastic support members 220a to 220d.

The housing 140 may have a groove 141b for the first position sensor on a side surface of the upper end 710 . The groove 141b for the first position sensor may have a size and shape corresponding to that of the first position sensor 180 .

For example, the groove 141b for the first position sensor may be formed on a side surface of the upper end 710 positioned between the supporting parts 720-1 to 720-4 of the housing 140.

The first position sensor 190 is disposed in the groove 141b for the first position sensor of the housing 140 . The first position sensor 190 is electrically connected to the first circuit board 170 by soldering or soldering.

For example, the first position sensor 190 may be electrically connected to the first terminal surface 170a of the first circuit board 170 .

The first position sensor 190 may be a sensor that detects a change in magnetic force emitted from the magnet 130 , and may determine a first displacement value related to a change in position of the bobbin 110 in the first direction. The first position sensor 190 may be disposed to correspond to the magnet 130 .

For example, the first position sensor 190 may receive data from a Hall sensor and the Hall sensor, and may perform data communication using a protocol with an external controller, for example, I2C communication. Alternatively, the first position sensor 190 may be implemented as a hall sensor alone.

Next, the first coil 120 will be described.

The first coil 120 is disposed on the outer circumferential surface of the housing 140 .

The first coil 120 may be disposed on the outer peripheral surface 730 of the support parts 720 - 1 to 720 - 4 of the housing 140 .

For example, the first coil 120 may include a ring disposed on the first to third side surfaces 730-1 to 730-3 of the support parts 720-1 to 720-4 of the housing 140 . The shape may be a coil block, but is not limited thereto.

The ring shape of the first coil 120 may be a polygon, for example, an octagon, corresponding to the shape of the outer circumferential surface 730 of the support parts 720 - 1 to 720 - 4 of the housing 140 . For example, in the ring shape of the first coil 120 , at least four surfaces may be straight, and a corner portion connecting the four surfaces may be round or straight.

The first coil 120 may directly face the magnet 130 through the opening 701 of the housing 140 . That is, the housing 140 is not interposed between the magnet 130 and the first coil 120 , and the first coil 120 and the magnet 130 may be opened to each other through the opening 701 .

Next, the upper elastic member 150 and the lower elastic member 160 will be described.

The upper elastic member 150 and the lower elastic member 160 elastically support the bobbin 110 to perform ascending and descending operations in a first direction parallel to the optical axis.

The upper elastic member 150 includes an inner frame 151 coupled to the bobbin 110 , an outer frame 152 coupled to the housing 140 , and a connection part 153 connecting the inner frame 151 and the outer frame 152 . ), and elastic support members 220a to 220d connected to the outer frame 152 may be included.

The lower elastic member 160 includes an inner frame 161 coupled to the bobbin 110, an outer frame 162 coupled to the housing 140, and a connector connecting the inner frame 161 and the outer frame 162 to ( 163) may be included. The upper elastic member 150 and the lower elastic member 160 may be in the form of a leaf spring.

The connecting portions 153 and 163 of the upper and lower elastic members 150 and 160, respectively, may be bent at least once to form a pattern having a predetermined shape.

The rising and/or lowering operation of the bobbin 110 in the first direction parallel to the optical axis may be supported by the elastic force through position change and micro-deformation of the connecting parts 153 and 163 . The connecting portions 153 and 163 may connect the inner frames 151 and 161 and the outer frames 152 and 162 so that the inner frames 151 and 161 are elastically deformable within a predetermined range with respect to the outer frames 152 and 162 in the first direction. .

The inner frame 151 of the upper elastic member 150 may have a hollow corresponding to the hollow 101 of the bobbin 110 and/or the hollow 201 of the housing 140 . The outer frame 152 of the upper elastic member 150 may have a polygonal ring shape disposed around the inner frame 151 .

The inner frame 151 of the upper elastic member 150 may have a bent portion 151a coupled to the upper support protrusion 113 of the bobbin 110 .

The bent portion 151a may have a convex groove shape from the center of the inner frame 151 to the outer circumferential direction of the inner frame 151 .

As shown in FIG. 10 , the bent portion 151a includes a first portion 911, a second portion 912, and a third portion positioned between the first portion 911 and the second portion 912 ( 913) may be included.

The first and second portions 911 and 912 of the bent portion 151a are to be fitted between the central protrusion 113a and the first upper protrusion 113b, and between the central protrusion 113a and the second upper protrusion 113c. can The inner circumferential surface of the third portion 913 of the bent portion 151a may be in contact with the outer circumferential surface of the central protrusion 113a of the bobbin 110 .

The upper support protrusion 113 of the bobbin 110 and the bent portion 151a of the upper elastic member 150 may be fixed by thermal fusion or an adhesive member such as epoxy.

A first through hole 152a coupled to the upper frame support protrusion 144 of the housing 140 may be provided in the outer frame 152 of the upper elastic member 150 . The upper frame support protrusion 144 of the housing 140 and the first through hole 152a of the upper elastic member 150 may be fixed by thermal fusion or an adhesive member such as epoxy.

The outer frame 152 of the upper elastic member 150 may include a first guide groove 155 coupled to the first stopper 143 of the housing 140 .

The guide groove 155 of the upper elastic member 150 may be formed at a position corresponding to the first stopper 143 of the housing 140 , for example, adjacent to a corner of the outer frame 152 .

For example, first guide grooves 155a and 155b corresponding to each of the divided first stoppers 143a and 143b may be formed in the outer frame 152 of the upper elastic member 150, and the first guide grooves ( 155a and 155b) may be spaced apart from each other.

The inner frame 161 of the lower elastic member 160 may have a hollow corresponding to the hollow 101 of the bobbin 110 and/or the hollow 201 of the housing 140 .

The outer frame 162 of the lower elastic member 160 may have a polygonal ring shape disposed around the inner frame 161 .

The lower elastic member 160 may be divided into two to receive power having different polarities. The lower elastic member 160 may include a first lower elastic member 150a and a second lower elastic member 150b that are electrically separated from each other.

Each of the inner frame 161 and the outer frame 162 of the lower elastic member 160 may be divided into two to be electrically separated.

For example, each of the first and second lower elastic members 160a and 160b may include any one of the two divided inner frames, and any one of the two divided outer frames, and a connection portion connecting both. can

A third through hole 161a coupled to the lower support protrusion 114 of the bobbin 110 may be provided in the inner frame 161 of the lower elastic member 160 . The lower support protrusion 114 of the bobbin 110 and the third through hole 161a of the lower elastic member 150 may be fixed by thermal fusion or an adhesive member such as epoxy.

The outer frame 162 of the lower elastic member 160 may include an insertion groove 162a coupled to the lower frame support protrusion 145 of the support parts 720-1 to 720-4 of the housing 140 . .

The lower frame support protrusion 145 of the housing 140 and the insertion groove 162a of the lower elastic member 160 may be fixed by thermal fusion or an adhesive member such as epoxy.

The lower elastic member 160 may be electrically connected to the first coil 120 .

The gaze of the first coil 120 may be electrically connected to the first lower elastic member 160a, and the vertical line of the first coil 120 may be electrically connected to the second lower elastic member 160b.

For example, at one end of the inner frame of the first lower elastic member 160a, a first bonding part to which the line of sight of the first coil 120 is electrically connected by soldering or soldering may be provided. In addition, a second bonding part to which the vertical wire of the first coil 120 is electrically connected may be provided at one end of the inner frame of the second lower elastic member 160b.

The lower elastic member 160 is electrically connected to a first circuit board 170 to be described later. For example, the outer frame 162 of each of the first and second lower elastic members 160a and 160b includes pad parts 165a and 165b electrically connected to the first circuit board 170 through soldering or soldering, etc. can be provided

The pad parts 165a and 165b of the lower elastic member 160 have first terminals 175-1 to 175-n, n>1, formed on the first terminal surface 170a of the first circuit board 170 . natural number) may be electrically connected to a corresponding terminal.

The coupling between the first through hole 151a of the inner frame 151 of the upper elastic member 150 and the upper support protrusion 113 of the bobbin 110, and the first of the inner frame 161 of the lower elastic member 160 3 By the coupling between the through hole 161a and the lower support protrusion 114 of the bobbin 110, the bobbin 110 can be fixed to the inner frames 151 and 161 of the upper and lower elastic members 150 and 160. have.

In addition, the coupling between the second through hole 152a of the outer frame 152 of the upper elastic member 150 and the upper frame support protrusion 144 of the housing 140, and the outer frame 162 of the lower elastic member 160 By coupling between the insertion groove 162a of the housing 140 and the lower frame support protrusion 145 of the housing 140, the housing 140 is provided with the outer frames 152 and 162 of the upper and lower elastic members 150 and 160. can be fixed to

In another embodiment, each of the upper elastic member 150 and the lower elastic member 160 may be electrically connected to the first circuit board 170 without dividing the lower elastic member 160 into two.

In the embodiment, the lower elastic member 160 is divided into two, and the upper elastic member 150 is not divided, but is not limited thereto. In another embodiment, the lower elastic member 160 is not divided, the upper elastic member 150 is divided into two, and the upper elastic members divided into two are electrically connected to the first circuit board 170, whereby the first coil ( 120) can be supplied with power with different polarity.

In another embodiment, without dividing the upper and lower elastic members 150 and 160 , the gaze of the first coil 120 is connected to the upper elastic member 150 , and the vertical line of the first coil 120 is connected to the lower side. By connecting to the elastic member 160 and electrically connecting the upper and lower elastic members 150 to the first circuit board, power having different polarities may be supplied to the first coil 120 .

In another embodiment, the upper and lower elastic members 150 and 160 are not divided, the first circuit board 170 is not electrically connected, and the first coil 120 and the first coil 120 are electrically directly connected. By connecting and electrically connecting the first circuit board 170 and the second circuit board 250 by the elastic support members 220a to 220d, power having different polarities may be supplied to the first coil 120 .

Next, the first circuit board 170 will be described.

The first circuit board 170 is disposed on the upper elastic member 150 .

FIG. 15 is a perspective view of the first circuit board 170 shown in FIG. 2 .

15 , the first circuit board 170 is disposed on the outer frame 152 of the upper elastic member 150 in a downward direction from the first upper surface portion 170b and the first upper surface portion 170b. It may include a bent first terminal surface 170a.

The first upper surface portion 170b of the first circuit board 170 may have a shape corresponding to or coincident with the outer frame 152 of the upper elastic member 150 . For example, the first upper surface portion 170b of the first circuit board 170 may have a ring shape having a hollow 710 - 1 , and an outer peripheral surface of the upper surface portion 170b of the first circuit board 170 . may be a rectangle.

The first circuit board 170 may have a fourth through hole 171 coupled to the upper support protrusion 144 of the housing 140 in the first upper surface 170b. The upper support protrusion 144 of the housing 140 and the fourth through hole 171 of the first circuit board 170 may be fixed by thermal fusion or an adhesive member such as epoxy.

The first circuit board 170 may include a second guide groove 172 coupled to the first stopper 143 of the housing 140 . Here, the second guide groove 172 may be in the form of a through groove penetrating the first circuit board 170 .

The first stopper 143 of the housing 140 includes a first guide groove 155 of the outer frame 152 of the upper elastic member 150 , and a second guide groove 172 of the first circuit board 170 , and can be combined together.

The second guide groove 172 of the first circuit board 170 is at a position corresponding to the first stopper 143 of the housing 140 , for example, on the first upper surface 170b of the first circuit board 170 . It may be formed adjacent to the edge.

For example, second guide grooves 172a and 172b corresponding to the divided first stoppers 143a and 143b may be formed on the first upper surface 170b of the first circuit board 170, and the second guide The grooves 172a and 172b may be spaced apart from each other.

The first circuit board 170 may include first pads 174a to 174d electrically connected to one end of the elastic support members 220a to 220d on the first upper surface 170b.

For example, the first pads 174a to 174d of the first circuit board 170 may have through holes through which the elastic support members 220a to 220d are inserted.

Each of the first pads 174a to 174d of the first circuit board 170 may be electrically connected to one end of a corresponding one of the elastic support members 220a to 220d by soldering or soldering.

Each of the first pads 174a to 174d of the first circuit board 170 has a corresponding one of the corners of the first upper surface 170b of the first circuit board 170 and the second guide grooves 172a and 172b. can be placed between one.

The first terminal surface 170a of the first circuit board 170 may be vertically bent downward from the first upper surface portion 170b, and may include a plurality of first terminals to which an electrical signal is input from the outside, or It may include first pins (pins, 175-1 to 175-n, where n>1 is a natural number).

For example, in order to facilitate electrical connection with the first position sensor 190, the first terminal surface 170a of the first circuit board 170 has a housing 140 in which a groove 141b for the first position sensor is provided. It may be bent to the side of the upper end 710 of the. Accordingly, the first position sensor 190 disposed in the groove 141b for the first position sensor may be in close contact with the first terminal surface 170a of the first circuit board 170 .

The plurality of terminals (175-1 to 175-n, where n>1 is a natural number) is a terminal for receiving power from the outside and supplying power to the first position sensor 190, the output of the first position sensor 190 It may include a terminal for outputting and/or a terminal for testing the first position sensor 190 . The number of terminals 175-1 to 175-n, where n>1 is a natural number, formed on the first circuit board 170 may increase or decrease according to the types of components that need to be controlled.

The first position sensor 190 includes a plurality of terminals (175-1 to 175-n, where n>1 is a natural number) formed on the first terminal surface 170a of the first circuit board 170 by soldering or a soldering method. It may be electrically connected to at least one of the terminals, and the number of electrically connected terminals may be determined according to an implementation form of the first position sensor 190 .

In another embodiment, the first circuit board 170 and the upper elastic member 150 may be integrally implemented. For example, the first circuit board 170 may be omitted, and the upper elastic member 150 may include a structure in which a thin film having heat resistance, chemical resistance, and bending resistance, and a copper foil pattern for circuit wiring are laminated. .

Also, in another embodiment, the first circuit board 170 and the lower elastic member 160 may be integrally implemented. For example, the first circuit board 170 may be omitted, and the lower elastic member 160 may include a structure in which a flexible film and a copper foil pattern are laminated.

Next, the base 210 , the second circuit board 250 , and the second coil 230 will be described.

The base 210 is connected to the above-described cover member 300 , and the supporting parts 720 - 1 to 720 - 4 of the housing 140 may be fixed thereto.

FIG. 14 is an exploded perspective view of the base 210 , the second circuit board 250 , and the second coil 230 shown in FIG. 2 .

14, the base 210 is provided with a hollow 101 of the above-described bobbin 110, or / and a hollow (301, see FIG. 10) corresponding to the hollow 201 of the housing 140, It may have a shape that matches or corresponds to the cover member 300 , for example, a rectangular shape.

In addition, the base 210 is recessed from the upper surface, and a seating groove 213 for inserting or fixing the lower frame support protrusion 145 of the support parts 720-1 to 72-4 of the housing 140 . can be provided.

For example, the seating groove 213 may be formed on the upper surface of the base 210 to correspond to the second sidewall 142 of the housing 140 .

In order to facilitate the insertion of the lower frame support protrusion 145 of the housing 140 , a portion of the side of the seating groove 213 may be opened into the hollow 301 of the base 210 . That is, one of the side surfaces of the seating groove 213 of the base 210 toward the hollow of the base 210 may be opened.

The lower frame support protrusion 145 of the housing 140 may be inserted into the seating groove 213 and fixed to the seating groove 213 by an adhesive member such as epoxy.

The base 210 is concave inward by a predetermined depth from the side surface, and has a size corresponding to the terminal surface 250a of the second circuit board 250 in order to support the terminal surface 250a of the second circuit board 250 . It may be provided with a terminal surface support groove (210a) having a.

The terminal surface support groove 210a may be formed in at least one of the side surfaces of the base 210 , and may not protrude out of the outer circumferential surface of the base 210 or protrude out of the outer circumferential surface of the base 210 to control the degree of protrusion. It may serve to seat the terminal surface 250a of the circuit board 250 .

In addition, the base 210 is recessed from the upper surface, a second position sensor seating groove 215a in which the second position sensor 240a is disposed, and a third position sensor seating groove in which the third position sensor 240b is disposed. (215b) may be provided.

An angle formed by virtual lines connecting the second and third position sensor seating grooves 215a and 215b and the center of the base 210 may be 90 degrees.

The second and third position sensor seating grooves 215a and 215b may be opened out of the side of the base 210 and may be opened through the hollow 301 of the base 210, but is not limited thereto, and other In an embodiment, the second and third position sensor seating grooves may be in the form of grooves recessed from the upper surface.

The second and third position sensor seating grooves 215a and 215b may be located in the center of the side of the upper surface of the base 210 . For example, the first and second position sensor seating grooves 215a and 215b may correspond to or be aligned with the center of or near the center of the second coil 230 , and the center of the second coil 230 and the position sensor seating grooves The centers of the second and third position sensors 240a and 240b disposed on the ones 215a and 215b may be aligned with each other.

The upper surface of the second and third position sensors 240a and 240b disposed in the second and third position sensor seating grooves 215a and 215b and the upper surface of the base 210 may be on the same plane.

In addition, the base 210 may further include a step 210b protruding from the lower portion of the outer peripheral surface. When the base 210 and the cover member 300 are coupled, the upper portion of the step 210b of the base 210 may guide the cover member 300 and may contact the lower portion of the cover member 300 . The step 210b and the end of the cover member 300 may be adhesively fixed and sealed by an adhesive or the like.

The base 210 may include a coupling protrusion 212a protruding from the upper surface to fix the second circuit board 250 .

The coupling protrusion 212a may be disposed on an upper surface adjacent to an edge of the base 210 . For example, the coupling protrusion 212a may be positioned between an edge of the base 210 and the seating groove 213 . The number of coupling protrusions 212a may be two or more, and may be disposed to face each other, but is not limited thereto.

The printed circuit board on which the image sensor is mounted may be combined with the lower surface of the base 210 to constitute a camera module.

Next, the second and third position sensors 240a and 240b will be described.

The second and third position sensors 240a and 240b are disposed under the second circuit board 250 . For example, the second and third position sensors 240a and 240b may be disposed in the position sensor seating grooves 215a and 215b of the base 210 , and the housing 140 may move in the second direction and/or the third direction. sense moving in the direction.

The second and third position sensors 240a and 240b may detect a change in magnetic force emitted from the magnet 130 . For example, the second and third position sensors 240a and 240b may be Hall sensors, but are not limited thereto, and any sensor capable of detecting a change in magnetic force may be used.

The second and third position sensors 240a and 240b may be arranged to be aligned with the center of the second coil 230 .

The second and third position sensors 240a and 240b may be electrically connected to the second circuit board 250 by soldering or soldering.

Next, the second circuit board 250 will be described.

The second coil 230 may be installed on an upper surface of the second circuit board 250 , and the position sensors 240a and 240b may be installed on a lower surface of the second circuit board 250 . The first and second position sensors 240a and 240b, the second coil 230 and the magnet 130 may be disposed on the same axis, but are not limited thereto.

The second circuit board 250 is disposed on the upper surface of the base 210 , the hollow 101 of the bobbin 110 , the hollow 201 of the housing 140 , or/and the hollow of the base 210 ( It has a hollow (401, see FIG. 14) corresponding to 301). The shape of the outer peripheral surface of the second circuit board 250 may match or correspond to the upper surface of the base 210 , for example, a rectangular shape.

The second circuit board 250 may include at least one second terminal surface 250a that is bent from the upper surface and on which a plurality of terminals receiving electrical signals from the outside or pins are formed. can

For example, the second circuit board 250 may include terminals for second coils, terminals for second and third position sensors, and terminals for the first circuit board on the terminal surface 250a.

The terminals for the second coil may be terminals to which signals for driving the second coils 230a to 230d are input. For example, in order to independently drive each of the four second coils 230a to 230d, there may be a total of eight terminals for the second coil. Alternatively, in order to independently drive the coils 230a and 230b for the second direction and the coils 230c and 230d for the third direction, there may be a total of four terminals for the second coil.

The terminals for the second coil may be electrically connected to pads 253 - 1 to 253 - 8 of the second circuit board 250 to be described later through a wiring pattern of the second circuit board 250 .

The terminal for the second position sensor may include two input terminals and two output terminals, and the terminal for the third position sensor may include two input terminals and two output terminals. However, since the second position sensor and the third position sensor may use two input terminals in common, there may be a total of six terminals for the second and third position sensors.

The terminals for the first circuit board may be terminals allocated to the first circuit board 170 .

For example, when the first position sensor 190 has a structure including a Hall sensor and a driver for I2C communication, a first power supply (VCC), a second power supply (GND), a synchronization clock signal (SCL), and data Four terminals for bit information SDA may be required.

When the first position sensor 190 is an integrated Hall sensor and driver, the first position sensor 190 may provide two power sources having different polarities provided to the first coil 120 , in which case the first position sensor 190 and the first coil 120 may be electrically connected through a wiring pattern of the first circuit board. Accordingly, when the first position sensor 190 is an integrated Hall sensor and driver, there may be a total of four terminals for the first circuit board.

Also, for example, when the first position sensor 190 is implemented as a Hall sensor alone, four power terminals for the Hall sensor may be required. Therefore, when the first position sensor 190 is implemented as a Hall sensor alone, there may be a total of four terminals for the first circuit board.

The upper and lower elastic members 150 and 160 are not divided, and power is supplied to the first coil 120 by the first circuit board 120 , the second circuit board 250 , and the elastic support members 220a to 220d. supply, and when the first position sensor 190 is implemented as a Hall sensor alone, there may be a total of six terminals for the first circuit board.

Terminals for the first circuit board of the second circuit board 250 may be electrically connected to the first circuit board 170 by elastic support members 220a to 220d to be described later.

The second circuit board 250 may be a flexible printed circuit board (FPCB), but is not limited thereto, and terminals of the circuit board may be formed on the surface of the base 210 using a surface electrode method or the like.

The second circuit board 250 may include at least one terminal or pad 253 - 1 to 253 - 8 to which the line of sight or the vertical line of the second coil 230 is electrically connected.

For example, the second circuit board 250 includes first terminals 253-1 and 253-3 to which the gazes of the second coils 230a and 230b for the second direction are electrically connected, and a second coil for the second direction ( The second terminals 253-2 and 253-4 to which the vertical wires of 230a and 230b are electrically connected, and the third terminal 253-5 to which the gazes of the second coils 230c and 230d for the third direction are electrically connected. , 253 - 7 ), and fourth terminals 253 - 6 and 253 - 8 to which vertical wires of the second coils 230c and 230d for the third direction are electrically connected.

The second circuit board 250 may include a fifth through hole 251 coupled to the coupling protrusion 212a of the base 210 . The fifth through hole 251 of the circuit board 250 may be plural, and may be disposed to face each other.

For example, the fifth through hole 251 is formed between the first terminal 253 - 3 and the third terminal 253 - 7 of the second circuit board 250 , and between the second terminal 253 - 2 and the fourth terminal ( 253 - 2 ). 253-6).

The second circuit board 250 may include second pads 252a to 252d to which one ends of the elastic support members 220a to 220d are connected. For example, the second pads 252a to 252d may have a groove or a through hole into which one end of the elastic support member 220a to 220d can be inserted.

Each of the second pads 252a to 252d may be disposed adjacent to an edge of the second circuit board 250 , but is not limited thereto.

The second pads 252a to 252d may be electrically connected to a plurality of pins provided on the terminal surfaces 251a and 251b by a wiring pattern formed on the second circuit board 250 .

Next, the second coil 230 will be described.

The second coils 230a to 230d are disposed on the upper surface of the second circuit board 250 to correspond to or face the magnet 130 .

In FIG. 14 , the second coils 230a to 230d are disposed on the upper surface of the second circuit board 250 , but the present invention is not limited thereto, and in another embodiment, a circuit board separate from the second circuit board 250 . The coil may be included in the structure, and may be disposed in close contact with the base 210 , or may be disposed to be spaced apart from the base 210 by a predetermined distance.

The second coils 230a to 230d may be aligned on the same axis as the magnet 130 , but the present invention is not limited thereto. In another embodiment, the second coils 230a to 230d are disposed to have a separation distance greater than the separation distance between the magnet 130 and the virtual central axis passing through the hollow 101 of the bobbin and the hollow 301 of the housing 140 . may be or may be arranged to have the same separation distance.

A total of four second coils 230a to 230d may be installed on the upper surface of the second circuit board 250 to be spaced apart from each other. For example, the second coils 230a to 230d may include second coils 230a and 230b for the second direction aligned parallel to the second direction, and second coils for the third direction aligned parallel to the third direction. (230c, 230d) may be included.

Another embodiment may include a second coil including one second coil for the second direction and one second coil for the third direction, and another embodiment may include three or more second coils for the second direction. coils, and three or more second coils for a third direction.

In addition, the second coils 230a to 230d may be in the form of a donut-shaped wound wire, and may be electrically connected to the second circuit board 250 .

For example, the second coils 230a to 230d may be electrically connected to the terminals 253 - 1 to 253 - 8 of the second circuit board 250 .

Next, the elastic support members 220a to 220d will be described.

The elastic support members 220a to 220d electrically connect the first circuit board 170 and the second circuit board 250 .

The first upper surface portion of the first circuit board 120 includes one or more first corner regions, and the second upper surface portion of the second circuit board 250 includes one or more second corner regions corresponding to the first corner region. may include At least one of the elastic support members 220a to 220d may be disposed between the first corner area and the second corner area.

The first corner area may be an area within a predetermined distance from the edge of the first upper surface of the first circuit board 120 , and the second corner area may be a predetermined distance from the second upper surface of the second circuit board 250 . It may be an area within a distance.

For example, the first pads 174a to 174d may be provided in the first corner region of the first circuit board 170 , and the second pads 252a to 252d are the second pads of the second circuit board 250 . It may be provided in the corner area.

For example, one end of the elastic support members 220a to 220d may be electrically connected to the first pads 174a to 174d of the first circuit board 170 , and the other end of the elastic support member 220a to 220d may be electrically connected to the second circuit board 250 . The second pads 252a to 252d may be electrically connected, and the second pads 252a to 252d may be electrically connected to the terminals for the first circuit board by a wiring pattern of the second circuit board 250 . .

The lens driving device of FIG. 2 may include elastic support members 220a to 220d facing each other. In FIG. 13 , the number of elastic support members connecting the first corner region of each first circuit board 170 and the second corner region of the second circuit board 250 may be one.

The elastic support members 220a to 220d may be point-symmetric in second and third directions perpendicular to the first direction with respect to the center of the housing 140 .

The number of the elastic support members 220a to 220d may be greater than or equal to the number of terminals for the first circuit board.

For example, when the first position sensor 190 is an integrated Hall sensor and driver, the number of elastic support members 220a to 220d may be four or more. In addition, when the first position sensor 190 is implemented as a Hall sensor alone, the number of the elastic support members 220a to 220d may be six or more.

The second pads 252a to 252d of the second circuit board 250 may be electrically connected to terminals for the first circuit board formed on the second terminal surface 250a of the second circuit board 250 .

The elastic support members 220a to 220d may serve as a passage through which electrical signals between the second circuit board 250 and the first circuit board 170 move, and elastically support the housing 140 with respect to the base 210 . can be supported by

The elastic support members 220a to 220d may be formed as a separate member from the upper elastic member 150, and may be supported by an elastic member, for example, a leaf spring, a coil spring, It may be implemented as a suspension wire or the like. In another embodiment, the elastic support members 220a to 220d may be integrally formed with the upper elastic member.

18 is a plan view of a lens driving device according to another exemplary embodiment, and FIG. 19 is a perspective view of the lens driving device shown in FIG. 18 . 18 and 19 are views in which the cover member 300 is omitted.

18 and 19 , the lens driving device 10 shown in FIG. 2 includes four elastic support members, but the elastic support members 220-1 to 220-6 shown in FIG. 19 are a total It can be six.

The elastic support members 220 - 1 to 220 - 6 may be point-symmetric in second and third directions perpendicular to the first direction with respect to the center of the housing 140 .

For example, the elastic support members 220 - 1 to 220 - 6 are the first elastic support members 220 - 1 and 220 that are point-symmetrical in a second direction perpendicular to the first direction with respect to the center of the housing 140 . -4), and second elastic support members 220-2, 220-3, 220-5, which are point-symmetrical in a third direction perpendicular to the first direction and the second direction with respect to the center of the housing 140; 220-6) may be included.

The number of the first elastic support members 220-1 and 220-4 and the second elastic support members 220-2, 220-3, 220-5, 220-6 may be different from each other. For example, the number of the second elastic support members 220-2, 220-3, 220-5, 220-6 may be greater than the number of the first elastic support members 220-1 and 220-4.

The first elastic support members for the bobbin 110 in order to symmetrically or equal the elastic force in the second direction and the third direction of the elastic support members 220-1 to 220-6 with respect to the bobbin 110 The sum of the elastic forces of 220-1 and 220-4 and the sum of the elastic forces of the second elastic support members 220-2, 220-3, 220-5, and 220-6 with respect to the bobbin 110 may be the same. can

For example, since the number of the second elastic support members 220-2, 220-3, 220-5, 220-6 is greater than the number of the first elastic support members 220-1 and 220-4, the second The elastic modulus of the elastic support members 220-2, 220-3, 220-5, and 220-6 may be 1/2 of the elastic modulus of the first elastic support members 220-1 and 220-4. .

20 is a plan view of a lens driving device according to another embodiment, and FIG. 21 is a perspective view of the lens driving device shown in FIG. 20 . 20 and 21 are views in which the cover member 300 is omitted.

20 and 21 , the number of the elastic support members 220-1' to 220-8' may be 8 in total. The elastic support members 220-1' to 220-8' are the first elastic support members 220-1 and 220 that are point-symmetrical in a second direction perpendicular to the first direction with respect to the center of the housing 140. -2, 220-5', 220-6'), and the second elastic support members 220- that are point-symmetrical in the first direction and the third direction perpendicular to the second direction with respect to the center of the housing 140 . 3', 220-4', 220-7', 220-8').

The number of the first elastic support members (220-1', 220-4') and the second elastic support members (220-2', 220-3', 220-5', 220-6') is the same , at least one of the first and second elastic support members 220 - 1 ′ to 220 - 8 ′ may electrically connect the first circuit board 120 and the second circuit board 250 . In addition, the elastic modulus of the first and second elastic support members 220-1' to 220-8' may be equal to each other.

22 is a conceptual diagram illustrating auto-focusing and hand-shake correction of the lens driving apparatus 10 according to an exemplary embodiment. Coil 1 may be a second coil 230a, coil 3 may be a second coil 230b, coil 2 may be a second coil 230c, and coil 4 may be a second coil 230d have.

Referring to FIG. 22 , the movable part 60 may be positioned above the second circuit board 250 and the base 210 at an initial position.

Here, the initial position may be a position at which the movable part 60 is placed as the upper and lower elastic members 150 and 160 are elastically deformed only by the weight of the movable part 60 .

For example, it may be desirable to set the initial position to a movement distance that can compensate for about 0.5° to 1.5°, and when converted into the focal length of the lens, the movable part ( 50).

Here, in the case of auto-focusing, the movable part 60 may include a magnet 130, a bobbin 110, and a lens (not shown) mounted on the bobbin 110, and the fixed part includes a housing 140, a cover member ( 300 , a base 210 , second coils 230a to 230d , and a second circuit board 250 may be included.

In addition, in the case of OIS for handshake correction, the movable part 60 includes a magnet 130 , a bobbin 110 , upper and lower elastic members 150 and 160 , a first circuit board 170 , and a first position sensor 190 ). may include. On the other hand, the fixing part may include the housing 140 , the cover member 300 , the base 210 , and the second coils 230a to 230d.

By the electromagnetic force between the magnet 130 and the first coil 120 , the movable part 60 moves in the first direction, for example, in the upper direction (+Z-axis direction) and in the lower direction (-Z-axis direction) based on the initial position. By doing so, auto-focusing can be performed. For example, auto-focusing may be performed by controlling the direction of the current flowing through the first coil 120 . Due to this, the embodiment may be miniaturized, and the movable part 60 may be moved to a desired place with less electromagnetic force.

For example, the bobbin 110 and the base 210 may be spaced apart from each other in order to perform auto-focusing in the upper and lower directions based on the initial position.

OIS operation is based on the value measured by the gyro sensor, the movable part 60 by the electromagnetic force generated between the magnet 130 and the second coil (230a to 230d) -X-axis direction, +X-axis direction, -Y It moves in the axial direction or the +Y axis direction.

Each of the four second coils 230a to 230d may be independently driven. For example, by independently controlling the direction of the current flowing in each of the four second coils 230a to 230d, the movable part 60 may be moved in the X-axis and the Y-axis. Due to this, the embodiment may allow image correction in a free direction.

23 is a view showing the moving direction of the movable part 60 according to the control of the second coils 230a to 230d according to the first embodiment.

Referring to FIG. 23 , in the table, 0 means not driving, 1 may mean driving, and may mean a difference in voltages input to the second coils 230a to 230d. For example, 0 may mean that no current is applied, and 1 may mean that current is applied to the second coil so that electromagnetic force acts in the direction of the second coil from the movable part 60 .

Referring to FIG. 23 , as the four second coils 230a to 230d are independently driven, the movable unit 60 moves in the +X direction, -X direction, +Y direction, -Y direction, X+Y+ direction, It may move in any one of the X-Y+ direction, the X+Y- direction, and the XY- direction, or may not move in the X-axis and Y-axis directions.

In addition, as the first coil 120 and the second coils 230a to 230d are simultaneously driven, auto-focusing and OIS operations may be simultaneously performed. For example, the auto-focusing and OIS operations may be simultaneously performed by adjusting the levels of signals provided to the first coil 120 and the second coils 230a to 230d.

24 is a view showing the moving direction of the movable part 60 according to the control of the second coils 230a to 230d according to the second embodiment.

Referring to FIG. 24 , the two second coils 230a and 230b and 230c and 230d facing each other are electrically connected, and two pairs of second coils 230a and 230b, 230c and 230d that are electrically connected to each other are electrically connected. can be driven independently. 0 indicates no driving, and + and - may mean that the direction of the driving current is opposite to each other.

Compared with FIG. 23 , in FIG. 24 , since the two second coils are connected, a greater force may be applied to the movable part 60 . In addition, as the first coil 120 and the second coils 230a to 230d are simultaneously driven, auto-focusing and OIS operations may be simultaneously performed. For example, the auto-focusing and OIS operations may be simultaneously performed by adjusting the levels of signals provided to the first coil 120 and the second coils 230a to 230d.

25 shows the position of the movable part 60 according to the intensity of the current applied to the first coil 120 .

Referring to FIG. 25 , by controlling the intensity and direction of the current applied to the first coil 120 , the movable part 60 may be moved in the upper and lower directions with respect to the initial position 0 .

For example, a movement distance (eg, 200 μm) in an upper direction of the movable part 60 based on the initial position 0 may be greater than a movement distance (eg, 100 μm) in a downward direction of the movable part 60 . This is to minimize the consumption of current and voltage in an area of 50 cm or more, which is the area most frequently used by users. Here, the upward movement distance may be a distance from the initial position (0) to the upper stopper of the movable part 60, and the downward movement distance may be the distance from the initial position (0) to the lower stopper of the movable part 60. .

26A to 26D show a driving algorithm for an auto-focusing operation.

The horizontal axis represents the focal length, and the vertical axis represents displacement in a direction parallel to the optical axis, for example, in the +Z-axis direction and the -Z-axis direction. As shown in FIG. 26A , assuming that the optimal focal length for the subject is F1, the method of finding F1 may be as follows.

Referring to FIG. 26B, after moving the movable part 60 to the maximum movable point in the -Z-axis direction, the moving part 60 is moved to the maximum movable point in the +Z-axis direction while taking a picture of the subject. to find the focal length of

Referring to FIG. 26C , after moving the movable part 60 to the maximum movable point in the +Z-axis direction, the moving part 60 is moved to the maximum movable point in the -Z-axis direction while taking a picture of the subject. to find the focal length of

Referring to FIG. 26D, while moving the movable part 60 from the initial position (0) to the first distance (d1) in any one of the +Z-axis direction and the -Z-axis direction, the photographing of the subject is completed, and the movable part ( 60) is moved to the initial position (0), the moving part 60 is moved from the initial position (0) to the second distance d2, and the subject is photographed, and the movable part 60 is again moved to the initial position (0) It is to find the optimal focal length by shooting while moving it to .

The camera module may include a lens driving device configured as described above, a lens barrel coupled to the bobbin 110 , an image sensor, and a printed circuit board. In this case, the image sensor may be mounted on the printed circuit board, and the printed circuit board may form a bottom surface of the camera module.

The bobbin 110 may include a lens barrel in which at least one lens is installed, and the lens barrel may be formed to be screw-coupled to the inside of the bobbin 110 . However, the present invention is not limited thereto, and although not shown, the lens barrel may be directly fixed to the inside of the bobbin 110 by a method other than screw coupling, or one or more lenses may be integrally formed with the bobbin without the lens barrel. The lens may be composed of one sheet, or two or more lenses may be composed to form an optical system.

An infrared cut filter may be additionally installed in an area of the base corresponding to the image sensor, and may be coupled to the cover member 300 . In addition, the lower side of the cover member 300 may be supported. A separate terminal member may be installed on the base 210 to conduct electricity with the printed circuit board of the camera module, and it is also possible to integrally form the terminal using a surface electrode or the like. Meanwhile, the base 210 may function as a sensor holder to protect the image sensor, and in this case, a protrusion may be formed in a downward direction along the side surface of the base 210 . However, this is not an essential configuration, and although not shown, a separate sensor holder may be disposed under the base 210 to perform its role.

Features, structures, effects, etc. described in the above embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, features, structures, effects, etc. illustrated in each embodiment can be combined or modified for other embodiments by those of ordinary skill in the art to which the embodiments belong. Accordingly, the contents related to such combinations and modifications should be interpreted as being included in the scope of the present invention.

110: bobbin 120: first coil
130: magnet 140: housing
150: upper elastic member 160: lower elastic member
210: base 230: second coil
240a, 240b: first and second position sensors 250: circuit board
300: no cover.

Claims (22)

housing;
a bobbin disposed within the housing;
a magnet and a first coil for moving the bobbin in a first direction parallel to an optical axis inside the housing by electromagnetic interaction;
a lower elastic member coupled to a lower portion of the bobbin and a lower portion of the housing;
a first circuit board disposed in the housing;
a second circuit board disposed under the housing;
a second coil disposed on the second circuit board; and
a support member electrically connecting the first circuit board and the second circuit board;
The lower elastic member includes a first lower elastic member and a second lower elastic member spaced apart from the first lower elastic member,
One end of the first lower elastic member is connected to one end of the first coil, the other end of the first lower elastic member is electrically connected to the first circuit board, and one end of the second lower elastic member is connected to the first coil. A lens driving device connected to the other end of the first coil, and the other end of the second lower elastic member is electrically connected to the first circuit board. According to claim 1,
The number of the support members is plural, and the plurality of support members are point symmetric in second and third directions perpendicular to the first direction with respect to the center of the housing. According to claim 1,
and an upper elastic member coupled to an upper portion of the bobbin and an upper portion of the housing. 4. The method of claim 3,
The first circuit board and the upper elastic member are integrally formed with the lens driving device. According to claim 3, wherein the first circuit board,
a first upper surface portion disposed on the upper elastic member;
a first terminal surface bent from the first upper surface portion and having a plurality of first terminals; and
and a first pad disposed on the first upper surface portion and electrically connected to one end of the support member. According to claim 5, wherein the second circuit board,
a second upper surface portion on which the second coil is disposed; and
and a second pad disposed on the second upper surface portion and electrically connected to the other end of the support member. According to claim 1, wherein the housing,
an upper end on which the first circuit board is disposed;
a plurality of support parts connected to the lower surface of the upper part; and
It includes a through groove formed in the edge of the upper end,
The support member passes through the through groove. 8. The method of claim 7,
The through-groove has an opening that opens out of a side surface of the upper end of the housing, and the support member is spaced apart from the through-groove. 8. The method of claim 7,
The housing includes a first stopper protruding from the upper surface of the upper end,
The first circuit board includes a guide groove coupled to the first stopper. 8. The method of claim 7,
and a first position sensor electrically connected to the first circuit board and configured to determine a first displacement value related to a change in position of the bobbin in a first direction. 11. The method of claim 10,
The housing further includes a groove for a first position sensor on a side surface of the upper end,
The first position sensor is a lens driving device disposed in the groove for the first position sensor. 8. The method of claim 7,
a base disposed under the second circuit board and to which the plurality of supporting parts of the housing are fixed; and
The lens driving apparatus further comprising second and third position sensors electrically connected to the second circuit board and disposed on the upper surface of the base. According to claim 1,
The bobbin moves in at least one of a second direction or a third direction perpendicular to the first direction inside the housing by electromagnetic interaction between the second coil and the magnet. 7. The method of claim 6,
The first upper surface portion of the first circuit board includes at least one first corner region,
The second upper surface portion of the second circuit board includes at least one second corner area corresponding to the first corner area,
at least one of the plurality of support members is disposed between the first corner area and the corresponding second corner area;
The first corner area is an area within a predetermined distance from a corner of the first upper surface of the first circuit board, and the second corner area is an area within a predetermined distance from the second upper surface of the second circuit board. in-lens drive. According to claim 2, wherein the plurality of support members,
first support members that are point-symmetrical in the second direction with respect to the center of the housing; and
and second support members that are point-symmetrical in the third direction with respect to the center of the housing. According to claim 1,
Each of the first and second lower elastic members includes an inner frame coupled to the lower portion of the bobbin, an outer frame coupled to the lower portion of the housing, and a connecting portion connecting the inner frame and the outer frame,
One end of the first coil is coupled to the inner frame of the first lower elastic member, and the other end of the first coil is coupled to the inner frame of the second lower elastic member. 14. The method of claim 13,
The magnet is a lens driving device commonly used for electromagnetic interaction with each of the first and second coils. housing;
a bobbin disposed within the housing;
a first coil disposed in the housing;
a magnet disposed on the bobbin;
a first elastic member coupled to an upper portion of the bobbin and an upper portion of the housing;
a second elastic member coupled to a lower portion of the bobbin and a lower portion of the housing;
a first circuit board disposed in the housing;
a base disposed to be spaced apart from a lower portion of the housing;
a second circuit board disposed on the base;
a second coil disposed on the second circuit board and electrically connected to the second circuit board; and
It includes support members connected between the first elastic member and the second circuit board,
The second elastic member includes a first lower elastic member and a second lower elastic member spaced apart from each other,
The first lower elastic member electrically connects one end of the first coil and the first circuit board, and the second lower elastic member electrically connects the other end of the first coil to the first circuit board. drive. 19. The method of claim 18,
The lower portion of the bobbin is spaced apart from the second circuit board in the initial position,
The bobbin is raised or lowered in a first direction parallel to the optical axis from the initial position by electromagnetic interaction between the magnet and the first coil. 19. The method of claim 18,
One end of the support members is bonded to the first circuit board, and the other end of the support members is bonded to the second circuit board. 19. The method of claim 18,
a first position sensor electrically connected to the first circuit board; and
The lens driving device further comprising second and third position sensors electrically connected to the second circuit board. The method of claim 21, wherein the second circuit board comprises:
terminals for a second coil electrically connected to the second coil;
terminals for sensors electrically connected to the second and third position sensors; and
and terminals for a first circuit board electrically connected to the support members.

Images