KR102458711B1 - Lens moving unit and camera module including the same - Google Patents

Abstract

The embodiment provides a bobbin to which a lens is mounted, a housing accommodating the bobbin, a first magnet disposed in the housing, a first coil disposed in the bobbin to interact with the first magnet, and a second magnet disposed in the bobbin , a second coil interacting with the first magnet to move the housing, a position sensor disposed on the housing, and a third magnet disposed below the housing, wherein the third magnet comprises divided first to a magnet including fourth segments and a non-magnetic barrier rib disposed between the divided first to fourth segments, wherein the position sensor is a magnetic force strength of the second magnet and a magnetic force strength of the third magnet to detect

Description

A lens driving device and a camera module including the same

The embodiment relates to a lens driving device and a camera module including the same.

A mobile phone or smartphone 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) that adjusts 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.

The embodiment provides a lens driving device and a camera module capable of reducing costs such as material cost and assembly cost, reducing the number of terminals of a circuit board, and improving freedom of design by reducing circuit patterns.

A lens driving device according to an embodiment includes a bobbin on which a lens is mounted; a housing for accommodating the bobbin; a first magnet disposed on the housing; a first coil disposed on the bobbin to interact with the first magnet; a second magnet disposed on the bobbin; a second coil interacting with the first magnet to move the housing; a position sensor disposed in the housing; and a third magnet disposed under the housing, wherein the third magnet includes divided first to fourth segments, and a non-magnetic partition wall disposed between the divided first to fourth segments a magnet, and the position sensor is a lens driving device for sensing the strength of the magnetic force of the second magnet and the strength of the magnetic force of the third magnet.

In the initial position, the center of the third magnet may be aligned with the center of the position sensor, and the center of the third magnet may be the center of the non-magnetic partition wall positioned between adjacent edges of the first to fourth segments.

Any one edge of each of the divided first to fourth segments may be adjacent to each other, and each of the divided first to fourth segments may have two surfaces facing a neighboring segment.

Among the divided first to fourth segments, two segments may be N poles, and the remaining two segments may be S poles.

The position sensor may overlap the third magnet in a first direction parallel to the optical axis of the lens, but may not overlap the first magnet.

The position sensor may overlap the second magnet in a direction perpendicular to the first direction, and may not overlap the first coil in a direction perpendicular to the first direction.

The lens driving device may include upper and lower elastic members coupled to the bobbin and the housing; a circuit board disposed under the second coil; a base disposed under the circuit board; and a support member supporting the housing and connecting at least one of the upper elastic member and the lower elastic member to the circuit board.

The third magnet may be disposed in a seating groove provided on an upper surface of the base.

The position sensor may not overlap the second coil in a first direction parallel to an optical axis direction of the lens.

A camera module according to an embodiment includes a lens driving device according to an embodiment; a motion sensor for outputting position information by movement; and generating a first driving signal for autofocusing feedback driving of the lens driving device or a second driving signal for correcting hand shake of the lens driving device based on the position information and an output of a position sensor of the lens driving device It includes a control unit that

The first driving signal may be provided to a first coil of the lens driving device, and the second driving signal may be provided to a second coil of the lens driving device.

The embodiment may reduce costs such as material cost and assembly cost, reduce the number of terminals of the circuit board, and improve design freedom by reducing circuit patterns.

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 plan view of the lens driving device shown in FIG. 3 .
FIG. 5 is a first perspective view of the bobbin shown in FIG. 2 .
FIG. 6 is a second perspective view of the bobbin shown in FIG. 2 .
FIG. 7 is a perspective view of the housing shown in FIG. 2 ;
8 is a perspective view of the upper elastic member and the lower elastic member shown in FIG. 2 .
9 is a perspective view showing the coupling of the upper elastic member and the bobbin.
10 is a perspective view showing a coupling between the lower elastic member and the bobbin.
11 shows a first magnet and a position sensor disposed in the housing of FIG. 2 .
12 shows a first circuit board disposed on an upper elastic member.
13 is an exploded perspective view illustrating the base, the second circuit board, and the second coil shown in FIG. 2 .
FIG. 14 is a perspective view of the first circuit board shown in FIG. 2 .
15 is a cross-sectional view taken along line AB of the lens driving device shown in FIG. 3 .
16 shows the arrangement of the second magnet, the position sensor, and the third magnet.
FIG. 17 shows the second magnet, the position sensor, and the third magnet shown in FIG. 16 .
18 is an exploded perspective view of a camera module according to an embodiment.
19 is a block diagram illustrating AF feedback driving and OIS feedback driving of the camera module shown in FIG. 18 .

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. Also, 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 an embodiment, an optical module composed of a plurality of lenses is moved in the optical axis direction or in a direction parallel to the optical axis, or horizontally or perpendicular to the optical axis. It is possible to perform such an auto-focusing operation and an image stabilization operation by moving with respect to the printing surface.

1 is a schematic perspective view of a lens driving device 100 according to an embodiment, FIG. 2 is an exploded perspective view of the lens driving device 100 shown in FIG. 1 , and FIG. 3 is a lens driving device ( 100) shows a perspective view with the cover member 300 removed, FIG. 4 is a plan view of the lens driving device 100 shown in FIG. 3 , and FIG. 15 is a cross-sectional view taken along AB of the lens driving device shown in FIG. 3 .

In the drawings, 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

The lens driving device 100 according to the embodiment includes an upper elastic member 150, a bobbin 110, a first coil 120, a housing 140, a first magnet 130; 130-1 to 130-4; It includes a second magnet 185 , a third magnet 195 , a lower elastic member 160 , a position sensor 190 , a second coil 230 , and a first circuit board 170 .

In addition, the lens driving device 100 may further include a cover member 300 , elastic support members 220a to 220d , a second circuit board 250 , and a base 210 .

First, the cover member 300 will be described.

The cover member 300 includes the upper elastic member 150 , the bobbin 110 , the first coil 120 , the housing 140 , the first magnet 130 , and the second in the receiving space formed together with the base 210 . The magnet 185 , the 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 has an open lower portion and may have a box shape including an upper end and sidewalls, and a lower portion of the cover member 330 may be coupled to an upper portion of the base 210 . The shape of the upper end of the cover member 300 may be a polygon, for example, a square or an octagon.

The cover member 300 may have a hollow at the upper end 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 additionally provided in the hollow of the cover member 300 to prevent foreign substances such as dust or moisture from penetrating into the camera module.

The material of the cover member 300 may be a non-magnetic material such as SUS to prevent sticking with the first magnet 130 , but may be formed of a magnetic material to function as a yoke.

Next, the bobbin 110 will be described.

The bobbin 110 is disposed on the inside of the housing 140 to be described later, and by electromagnetic interaction between the first coil 120 and the first magnet 130 , the optical axis direction or a direction parallel to the optical axis, for example, the first direction can be moved.

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 inner side of the bobbin 110 in various ways.

5 is a first perspective view of the bobbin 110 shown in FIG. 2 , FIG. 6 is a second perspective view of the bobbin 110 shown in FIG. 2 , and FIG. 8 is an upper elastic member shown in FIG. 2 ( 150 ), and a perspective view of the lower elastic member 160 , FIG. 9 is a combined perspective view of the upper elastic member 150 and the bobbin 110 , and FIG. 10 is the lower elastic member 160 and the bobbin 110 . A combined perspective view is shown.

5, 6, and 8 to 10 , the bobbin 110 may have a hollow structure for mounting a lens or a lens barrel. The shape of the hollow may be determined by the shape of the lens or the lens barrel. For example, the hollow 101 of the bobbin 110 may be circular, oval, or polygonal, but is not limited thereto.

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 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 serve as a stopper preventing the bobbin 110 from rotating even when the bobbin 110 receives a force in a direction to rotate about the optical axis.

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 160 . .

A seating groove 116 having a size corresponding to that of the second magnet 185 may be provided on the outer peripheral surface of the bobbin 110 .

The position of the seating groove 116 of the bobbin 110 may be determined according to the arrangement position of the second magnet 185 and the arrangement position of the first coil 120 .

For example, when the first coil 120 is positioned in the first region P1 of the outer peripheral surface of the bobbin 110 , the seating groove 116 may be positioned in the second region P2 of the outer peripheral surface of the bobbin 110 . have. On the other hand, when the first coil 120 is positioned in the second region P2 of the outer peripheral surface of the bobbin 110 , the seating groove 116 may be positioned in the first region P1 of the outer peripheral surface of the bobbin 110 . have.

Here, the first area P1 of the outer circumferential surface of the bobbin 110 may be an area positioned below the reference line 115 - 1 of the outer circumferential surface of the bobbin 110 , and the second area P2 of the outer circumferential surface of the bobbin 110 . may be a region positioned above the reference line 115 - 1 of the outer peripheral surface of the bobbin 110 .

This is to improve reliability of auto-focusing by preventing the second magnet 185 and the first coil 120 disposed in the seating groove 116 from interfering with or being influenced by each other.

The reference line 115 - 1 of the outer peripheral surface of the bobbin 110 may be a line connecting points spaced apart by a reference distance from the upper end or the lower end of the outer peripheral surface of the bobbin 110 . For example, the reference line 115 - 1 may be a center line of the outer peripheral surface of the bobbin 110 .

The outer peripheral surface of the bobbin 110 may include a plurality of surfaces 115a and 115b.

For example, the outer peripheral surface of the bobbin 110 may include a plurality of first surfaces 115a and a plurality of second surfaces 115b, and each of the first surfaces 115a has two adjacent second surfaces 115b. can be placed between them.

The first surfaces 115a of the bobbin 110 may be positioned to face each other, and the second surfaces of the bobbin 110 may be positioned to face each other. The area of each of the first surfaces 115a of the bobbin 110 may be the same, and the area of each of the second surfaces 115b may be the same, and the area of the first surface 115a and the second surface 115b may be the same. may be different.

The first surfaces 115a of the bobbin 110 may be flat, and the second surfaces 115b may be curved surfaces convex from the center of the hollow 101 of the bobbin 110 to the outer peripheral surface of the bobbin 110, However, the present invention is not limited thereto.

The first surfaces 115a of the bobbin 110 may correspond to or face the first magnets 130-1 to 130-4 disposed in the housing 140, but are not limited thereto.

The seating groove 116 may be formed in any one of the first surfaces 115a, but is not limited thereto.

When the bobbin 110 moves in the first direction, in order to exclude spatial interference between the connection part 153 of the upper elastic member 150 and the bobbin 110 and to facilitate elastic deformation of the connection part 153 , the bobbin 110 may be provided with an upper escape groove 112 on the outer peripheral surface (110a) upper portion corresponding to the connection portion 153 of the upper elastic member (150). For example, the upper escape groove 112 may be formed above the first surfaces 115a of the bobbin 110 .

In addition, when the bobbin 110 moves in the first direction, spatial interference between the connection part 163 of the lower elastic member 160 and the bobbin 110 is excluded, and in order to facilitate elastic deformation of the connection part 163 more easily. The bobbin 110 may be provided with a lower escape groove 118 in the lower portion of the outer circumferential surface corresponding to the connection portion 163 of the lower elastic member 160 . For example, the lower escape groove 118 may be formed below the first surfaces of the bobbin 110 .

Next, the second magnet 185 will be described.

The second magnet 185 is disposed on the outer peripheral surface of the bobbin 110 . For example, the second magnet 185 may be disposed in the seating groove 116 formed on the outer peripheral surface of the bobbin 110 .

The second magnet 185 may be fixed to the seating groove 116 of the bobbin 110 by an adhesive member such as epoxy, but is not limited thereto. It may be fixed by being fitted in (116).

Next, the first coil 120 will be described.

The first coil 120 is disposed on the outer peripheral surface of the bobbin 110 . The first coil 120 may be disposed on the outer peripheral surface of the bobbin 110 to be spaced apart from the second magnet. For example, the first coil 120 may be disposed in the first region P1 of the outer peripheral surface of the bobbin 110 .

The first coil 120 may be wound around the outer peripheral surface of the bobbin 110 in the direction of rotation about the optical axis as shown in FIG. 9 .

In another embodiment, the first coil 120 may include a plurality of coil blocks, and each of the coil blocks may have a ring shape. In this case, each of the coil blocks may be disposed on a corresponding one of the first surfaces 115a of the bobbin 110 , and the shape of each of the coil blocks may be a polygon, for example, an octagonal shape or a circular shape.

Next, the housing 140 will be described.

The housing 140 supports the first magnet 130 and accommodates the bobbin 110 therein.

FIG. 7 is a perspective view of the housing 140 shown in FIG. 2 .

Referring to FIG. 7 , the housing 140 may have a hollow pillar shape as a whole. For example, the housing 140 may have a polygonal (eg, quadrangular or octagonal) or circular hollow 201 .

The housing 140 may include an upper end 710 having a hollow 201 , and a lower end 720 connected to a lower surface of the upper end 710 and supporting the upper end 710 .

The upper end 710 of the housing 140 may have a rectangular shape, but is not limited thereto. The lower end 720 of the housing 140 may include first side surfaces 720-1 to 720-4 and second side surfaces 730-1 to 730-4. Each of the second sides 730-1 to 730-4 has two adjacent first sides 720-1 and 720-2, 720-2 and 720-3, 720-3 and 720-4, 720- 4 and 720-1).

For example, the first side surfaces 720-1 to 720-4 of the housing 140 may be positioned to face each other, and the second side surfaces 730-1 to 730-4 of the housing 140 may face each other. It can be positioned for viewing. The first sides 720 - 1 to 720 - 4 of the housing 140 may correspond to or be aligned with the first sides 115a of the bobbin 110 , and the second sides 730 of the housing 140 . -1 to 730 - 4 may correspond to or be aligned with the second side surfaces 115b of the bobbin 110 .

Also, for example, the second side surfaces 730 - 1 to 730 - 4 of the housing 140 may correspond to or align with each of the four corners of the upper end 710 of the housing 140 .

An area of each of the first side surfaces 720-1 to 720-4 of the housing 140 may be larger than an area of each of the second side surfaces 730-1 to 730-4, but is not limited thereto.

The inner peripheral surface 740 of each of the second side surfaces 730 - 1 to 730 - 4 of the housing 140 is a curved surface convex from the center of the hollow 201 of the housing 140 to the outer peripheral surface 730 of the housing 140 . can be

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 of each of the second side surfaces 730 - 1 to 730 - 4 of the housing 140 . 740 may have a curved surface corresponding to or coincident with the curved surface of the outer peripheral surface of the bobbin 110 .

In order to support the first magnet 130 and the position sensor 190 , the housing 140 may include a step 731 protruding from the lower portion of the first side surfaces 720-1 to 720-4. . In the embodiment, a step 731 is provided to support the first magnet 130 and the position sensor 190 , but the present invention is not limited thereto. In another embodiment, the housing 140 may include at least one groove into which the first magnet 130 and the position sensor 190 may be inserted or seated. For example, at least one groove for seating the first magnet 130 and the position sensor 190 may be provided on at least one of an outer circumferential surface or an inner circumferential surface of the first side surfaces of the housing 140 .

The housing 140 may include at least one first stopper 143 protruding from the upper surface to prevent collision with the cover member 300 . 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 an area of the upper surface of the upper end 710 of the housing 140 so as to correspond to or align with the second side surfaces 730 - 1 to 730 - 4 of the housing 140 . have.

For example, 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. In addition, 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 the side surface of the upper end 710 in order to prevent 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 an edge of the housing 140 .

In addition, the housing 140 is a lower surface of the lower end 720 of the housing 140 for coupling with the outer frame 162 of the lower elastic member 160, for example, the second side surfaces 730-1 to 730-4. ) may be provided with at least one lower frame support protrusion (not shown) protruding from the lower surface.

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 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) may exist.

The outer support 742 is in contact with the first and second side surfaces 720-1 to 720-4, 730-1 to 730-4 of the housing 140, and the outer frame 152 of the upper elastic member 150 It may have a shape corresponding to or coincident with , and may support the outer frame 152 of the upper elastic member 150 .

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 positioned between the first portion S1 positioned corresponding to or aligned with each of the second side surfaces 730 - 1 to 730 - 4 of the housing 140 , and between the two adjacent first portions. and may include a second portion S2 positioned to correspond to the bent portion 151a of the upper elastic member.

The first part S1 of the buffer support 741 may be vertically aligned with the connection part 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 . Also, a damper may be disposed between the inner frame 151 of the upper elastic member 150 and the housing 140 . Also, a damper may be disposed between the inner frame 161 of the lower elastic member 160 and the housing 140 .

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. 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 of the housing 140 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 of the housing 140 may serve to guide or support the elastic support members 220a to 220d.

Next, the position sensor 190 will be described.

The position sensor 190 is disposed in the housing 140 . For example, the position sensor 190 may be disposed on the outer peripheral surface of the housing 140 to face or align with the second magnet 185 .

For example, the position sensor 190 may be disposed on any one (eg, 720-2) of the first sides 720-1 to 720-4 of the housing 140 to face or align with the second magnet 185 . It may be disposed to be spaced apart from the magnet 130 , and may be supported by the step 731 of the housing 140 .

The position sensor 190 may detect magnetic force emitted from the second magnet 185 and the third magnet 195 . For example, the position sensor 190 may generate an output value according to a result of detecting a change in magnetic force emitted from the second magnet 185 as the bobbin 110 moves in the first direction. Also, the position sensor 190 may generate an output value according to a result of detecting a change in the third magnet 195 as the housing 140 moves in the second and third directions.

The position sensor 190 may be a sensor that detects a change in magnetic force. For example, the position sensor 190 may be implemented as a Hall sensor alone. Alternatively, the position sensor 190 may be implemented as a driver IC including a Hall sensor capable of receiving data from and a Hall sensor and performing data communication using an external controller and a protocol, for example, I2C communication. have.

The position sensor 190 may be electrically connected to the first circuit board 170 by soldering or a soldering method. For example, the position sensor 190 may be electrically connected to the first terminal surface 170a of the first circuit board 170 through soldering or soldering.

Next, the first first magnet 130 will be described.

The first magnet 130 is disposed on the outer peripheral surface of the housing 140 to correspond to the first coil 120 . For example, the first magnet 130 may be disposed on the first side surfaces 720 - 1 to 720 - 4 of the housing 140 .

11 illustrates a first magnet and a position sensor disposed in the housing 140 of FIG. 2 .

Referring to FIG. 11 , the first magnet 130 may be fixed to the first side surfaces 720-1 to 720-4 of the housing 140 using an adhesive member such as an adhesive or double-sided tape. In another embodiment, the first magnet 130 may be seated in a groove provided in the housing 140 .

The number of the first magnets 130 may be one or more. For example, as shown in FIG. 2 , the embodiment may include four first magnets 130-1 to 130-4, and each of the four first magnets 130-1 to 130-4 The silver may be disposed on any one of the first side surfaces 720 - 1 to 720 - 4 of the housing 140 .

Each of the first magnets 130-1 to 130-4 may have a rectangular parallelepiped shape, but is not limited thereto, and may have a trapezoidal shape in another embodiment.

Each of the first magnets 130-1 to 130-4 may be disposed so that the wide side faces the outer circumferential surface of the housing 140, and the first magnets 130-1, 130-3, and 130 facing each other -2 and 130-4) may be arranged in parallel.

Each of the first magnets 130-1 to 130-4 may be disposed such that a surface facing the first coil 120 is an N pole and an opposite surface of the N pole is an S pole, but is not limited thereto, It is also possible to reverse the polarity of each of the first magnets 130-1 to 130-4.

In another embodiment, each of the first magnets 130-1 to 130-4 is divided into two planes perpendicular to the optical axis, so that the surface facing the first coil 120 can be divided into two or more, In this case, the first coil 120 may also be divided to correspond to the divided number of each of the first magnets 130 .

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 so as to perform an ascending and descending operation in a first direction parallel to the optical axis, and also the housing 140 by elasticity. support

As shown in Figure 8. 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 connector connecting the inner frame 151 and the outer frame 152 to each other ( 153) 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 connecting portion 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 parts 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 . 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.

The outer frame 152 of the upper elastic member 150 may be provided with a through hole 152a coupled to the upper frame support protrusion 144 of the housing 140 . The upper frame support protrusion 144 of the housing 140 and the 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 first guide grooves 155 (155a, 155b) 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 .

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. 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, the first lower elastic member 160a may include any one of the two divided inner frames, any one of the two divided outer frames, and a connection part connecting both. The second lower elastic member 160b may include the other one of the two divided inner frames, the other of the two divided outer frames, and a connection part connecting both.

The inner frame 161 of the lower elastic member 160 may be provided with a through hole 161a coupled to the lower support protrusion 114 of the bobbin 110 . The lower support protrusion 114 of the bobbin 110 and the 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 have an insertion groove 162a coupled to the lower frame support protrusion of the housing 140 . The lower frame support protrusion 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 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 third through hole of the inner frame 161 of the lower elastic member 160 By coupling between the 161a and the lower support protrusion 114 of the bobbin 110 , the bobbin 110 may be fixed to the inner frames 151 and 161 of the upper and lower elastic members 150 and 160 .

In addition, the coupling between the 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 insertion of the outer frame 162 of the lower elastic member 160 By coupling between the groove 162a and the lower frame supporting protrusion of the housing 140 , the housing 140 may be fixed to the outer frames 152 and 162 of the upper and lower elastic members 150 and 160 . .

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.

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 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 circuit board 170 and the first coil 120 are electrically connected. Power may be supplied to the first coil 120 by direct connection and electrically connecting the first circuit board 170 and the second circuit board 250 by the elastic support members 220a to 220d.

Next, the first circuit board 170 will be described.

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

14 is a perspective view of the first circuit board 170 shown in FIG. 2 , and FIG. 12 is a first circuit board 170 disposed on the upper elastic member.

12 and 14 , the first circuit board 170 is formed from the first upper surface portion 170b disposed on the outer frame 152 of the upper elastic member 150 , and the first upper surface portion 170b. It may include a first terminal surface 170a bent in a downward direction.

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 170b1 , and the outer peripheral surface of the upper surface portion 170b of the first circuit board 170 is rectangular. can be

The first circuit board 170 may have a 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 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 the first guide groove 155 of the outer frame 152 of the upper elastic member 150 , and the second guide groove 172 ; 172a of the first circuit board 170 . , 172b).

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 be electrode pads to which one ends of the elastic support members 220a to 220d are connected. Also, in another embodiment, 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.

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 position sensor 190 , the first terminal surface 170a of the first circuit board 170 is bent to one of the first sides of the upper end 710 of the housing 140 . can be

A 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 position sensor 190, a terminal for outputting the output of the position sensor 190, or/and a terminal for testing the 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.

By soldering or soldering method, the position sensor 190 is formed among the plurality of terminals 175-1 to 175-n formed on the first terminal surface 170a of the first circuit board 170, where n>1 is a natural number. It may be electrically connected to at least one, and the number of electrically connected terminals may be determined according to an implementation form of the 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 may be connected to the above-described cover member 300 , and the lower end 720 of the housing 140 may be fixed to the base 210 .

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

Referring to FIG. 13 , the base 210 has a hollow corresponding to the hollow 101 of the bobbin 110 , and/or the hollow 201 of the housing 140 , and coincides with the cover member 300 . Or it may be a corresponding shape, 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 side surfaces 730 - 1 to 730 - 4 of the housing 140 . In order to facilitate the insertion of the lower frame support protrusion of the housing 140 , a portion of the side of the seating groove 213 may be opened through the hollow of the base 210 .

The lower frame support protrusion of the housing 140 may be inserted into the seating groove 213 of the base 210 , and may be fixed to the seating groove 213 of the base 210 by an adhesive member such as epoxy.

The base 210 is concave inward to a predetermined depth from the side surface, and has a size corresponding to the terminal surface 250a of the second circuit board 250 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 does not protrude out of the outer circumferential surface of the base 210 or to control the degree of protrusion out of the outer circumferential surface of the base 210 . It may serve to seat the terminal surface 250a of the circuit board 250 .

Also, the base 210 may be recessed from the upper surface and include a seating groove 215b in which the third magnet 195 is disposed or seated. According to an embodiment, the third magnet 195 may be disposed in the seating groove 215b of the base 210 to be aligned with the position sensor 190 disposed in the housing 140 in the first direction. 13 , the seating groove 215b is disposed adjacent to one edge of the upper surface of the base 210 or the seating groove 213 of the base 210, but is not limited thereto. A separate epoxy or the like is not injected into the seating groove 215b of the base 210 , and the third magnet 195 may be disposed in the seating groove 215b of the base 210 . The magnet 195 may be fixed to the seating groove 215b of the base 210 .

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 of the base 210 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 the edge of the base 210 and the seating groove 213, but is not limited thereto.

Next, the second circuit board 250 will be described.

A second coil 230 may be disposed on an upper surface of the second circuit board 250 , and a third magnet 195 may be disposed on a lower surface of the second circuit board 250 . The second circuit board 250 is disposed on the upper surface of the base 210 , in the hollow 101 of the bobbin 110 , the hollow 201 of the housing 140 , or/and the hollow of the base 210 . A corresponding hollow may be provided. 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, but is not limited thereto.

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

For example, the second circuit board 250 may include terminals for second coils 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 the pads 253 of the second circuit board 250 through a wiring pattern of the second circuit board 250 .

The terminals for the first circuit board may be terminals allocated to the first circuit board 170 . For example, when the position sensor 190 has a structure including a Hall sensor and a driver for I2C communication, the first power supply (VCC), the second power supply (GND), the synchronization clock signal (SCL), and data bit information Four terminals for (SDA) may be needed.

Also, for example, when the position sensor 190 is implemented as a Hall sensor alone, four power terminals for the Hall sensor may be required. Therefore, when the position sensor 190 is implemented as a Hall sensor alone, there may be a total of four 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 to which the line of sight or the vertical wire of the second coil 230 is electrically connected.

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

The second circuit board 250 may include second pads 252a to 252d to which the other ends of the elastic support members 220a to 220d are connected. For example, the second pads 252a to 252d may have grooves or through holes into which the other ends of the elastic support members 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 or terminals 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 first magnet 130 .

The number of the second coils 230a to 230d may be one or more, and may be the same as the number of the first magnets 130 , but is not limited thereto.

In FIG. 13 , the second coils 230a to 230d are disposed to be spaced apart from each other on the upper surface of the second circuit board 250 , but the present invention is not limited thereto. In another embodiment, a coil may be included in a circuit board separate from the second circuit board 250 , 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. have.

The second coils 230a to 230d may be aligned on the same axis as the first magnet 130 , but the present invention is not limited thereto. In another embodiment, the second coils 230a to 230d have a larger separation distance than the separation distance from the virtual central axis passing through the hollow 101 of the bobbin and the hollow 201 of the housing 140 . It may be arranged to have 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 include second coils 230a and 230b for the second direction that are aligned parallel to the second direction, and second coils for the third direction that are aligned with 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.

For example, 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 to each other.

One end of the elastic support members 220a to 220d may be electrically connected to the first circuit board 170 , and the other end of the elastic support members 220a to 220d may be electrically connected to the second circuit board 250 .

For example, one end of the elastic support members 220a to 220d may be bonded and electrically connected to the first pads 174a to 174d of the first circuit board 170 . The other ends of the elastic support members 220a to 220d may be bonded and electrically connected to the second pads 252a to 252d of 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 member 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 is the second end of 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 . .

As shown in FIG. 3 , the elastic support members 220a to 220d may be disposed to face each other, and a first corner region of the first circuit board 170 and a second corner of the second circuit board 250 may be disposed. The number of elastic support members connecting the regions may be one.

For example, 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 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 a member capable of being supported by elasticity, for example, a leaf spring, a coil spring, It may be implemented as a suspension wire or the like. Also, in another embodiment, the elastic support members 220a to 220d may be integrally formed with the upper elastic member.

Next, the third magnet 195 will be described.

The third magnet 195 may be a bipolar magnet. The type of the third magnet 195 can be broadly divided into ferrite, alnico, and rare earth magnets, and can be classified into an inner magnetic type (Ptype) and an outer magnetic type (F-type) according to the shape of the magnetic circuit. However, the embodiment is not limited to the type of such a positive magnetizing magnet.

16 shows the arrangement of the second magnet 185 , the position sensor 190 , and the third magnet 195 , and FIG. 17 shows the second magnet 185 , the position sensor 190 , and the third magnet 195 shown in FIG. 16 . A third magnet 195 is shown.

16 and 17 , the third magnet 195 includes four divided segments 401 to 404 , and a non-magnetic partition wall 406 disposed between the divided segments 401 to 404 . can do. The segments 401 to 404 divided into four may include two N poles and two S poles.

For example, the third magnet 195 includes first to fourth segments 401 to 404 divided to be spaced apart from each other, and a non-magnetic partition wall 406 disposed between the first to fourth segments 401 to 404 . may include

Among the first to fourth segments 401 to 404, two segments 401 and 403 may have an N-pole, and the remaining two segments 402 and 404 may have an S-pole.

The segments 401 to 404 may be arranged so that any one edge is adjacent to each other. For example, each of the four segments 401 to 401 may be arranged so that two surfaces of the adjacent segment and two faces face each other.

Segments aligned in each of the second direction (eg, the X-axis direction) and the third direction (eg, the Y-axis direction) may have different polarities. For example, the first segment 401 may have an N pole, the second segment 402 may have an S pole, the third segment 403 may have an N pole, and the fourth segment 404 may have an S pole.

The non-magnetic barrier rib 406 may include a section having little polarity as a portion having substantially no magnetism, and may also be filled with air or include a non-magnetic material.

For example, the nonmagnetic barrier rib 406 may be formed between the first nonmagnetic barrier rib 301 positioned between the first segment 401 and the second segment 402 , and between the second segment 402 and the third segment 403 . The second non-magnetic partition wall 302 positioned between the third segment 403 and the fourth segment 404, and the third non-magnetic partition wall 303 positioned between the fourth segment 404 and the first segment 401 ) may include a fourth non-magnetic barrier rib 304 positioned between them.

One surface of each of the first to fourth segments 401 to 404 may be disposed to face or face the position sensor 190 in the first direction.

At least a portion of the position sensor 190 may overlap the third magnet 195 in the first direction (z-axis direction) or may be aligned with the third magnet 195 . Also, for example, the position sensor 290 may not overlap the first magnet 130 in the first direction.

Also, the position sensor 190 may not overlap the first coil 120 in a direction perpendicular to the first direction.

For example, the center 241 of the position sensor 190 in the first direction parallel to the optical axis of the lens may be aligned with the center 406a of the third magnet 195 . Here, the center 241 of the position sensor 190 may be the center of a sensing element that senses the magnetic force of the second coil 230 .

Also, the center 406a of the third magnet 195 may be the center of the non-magnetic partition wall 406 positioned between adjacent edges of the first to fourth segments 401 to 404 . For example, the center 406a of the third magnet 135 may be a region where the first to fourth non-magnetic partition walls 301 to 304 meet.

The second magnet 185 may be disposed to face the position sensor 190 in a direction perpendicular to the first direction, for example, in the second direction or the third direction. For example, at least a portion of the second magnet 185 may overlap the position sensor 190 in a direction perpendicular to the first direction, for example, the second direction or the third direction, or may be aligned with the position sensor 190 .

In the initial position, the center of the position sensor 190 may be aligned to face the center of the third magnet 195 in the first direction, but is not limited thereto. Here, the initial position is the initial position of the OIS movable part in a state where no power or driving current is applied to the second coil 230, or the upper and lower elastic members 150 and 160 are elastically deformed only by the weight of the OIS movable part. Accordingly, it may be a position where the OIS movable part is placed.

Here, the OIS movable part may include an AF movable part and components mounted on the housing 140 . For example, the OIS movable part may include the AF movable part and the housing 140 , and may further include a first magnet 130 and a position sensor 190 according to an embodiment.

The AF movable unit may include the bobbin 110 and components mounted on the bobbin 110 to move together with the bobbin 110 . For example, the AF movable unit may include a bobbin 110 and a lens (not shown) mounted on the bobbin 110 , and may further include a first coil 120 and a second magnet 185 according to an embodiment. can

The position sensor 190 disposed on the housing 140 may detect a change in the strength of the magnetic force of the second magnet 185 disposed on the bobbin 110 as the bobbin 110 moves in the first direction. In addition, the position sensor 190 disposed on the housing 140 may detect a change in the magnetic force of the third magnet 195 disposed on the base 210 as the housing 140 moves in the second or third direction. can

The output of the position sensor 190 only generates an output according to a change in the strength of the magnetic force of the second magnet 185 or a change in the magnetic force of the third magnet 195, for example, an output voltage or an output current, and the directionality is known. can't

With only the output of the position sensor 190 , it is not possible to know whether the output corresponds to either the movement of the AF movable part or the movement of the OIS movable part, and the directionality of which direction it is actually moved.

Therefore, whether the AF driving and OIS driving and the direction in which the AF moving part and the OIS moving part are moved can be known based on the position information (Gx, Gy, Gz) provided from the motion sensor 820 to be described later.

A typical lens driving device includes one position sensor for AF feedback driving and two position sensors (eg, an X-axis position sensor and a Y-axis position sensor) for OIS feedback driving.

On the other hand, the lens driving apparatus 100 according to the embodiment includes a second magnet 185 for AF feedback driving, one third magnet 195 for OIS feedback driving, and a second magnet separately from the first magnet 130 . One position sensor 190 for sensing the strength of the magnetic force of the magnet 185 and the strength of the magnetic force of the third magnet 195 may be provided. The embodiment may implement both AF feedback driving and OIS feedback driving by using one position sensor.

Therefore, in the embodiment, since the number of position sensors can be reduced from three to one, costs such as material cost and assembly cost can be reduced.

In addition, since the embodiment can reduce the number of position sensors from three to one, the number of terminals 251 of the terminal surface 253 of the circuit board 250 can be reduced, and the degree of freedom in design by reducing the circuit pattern can improve

In addition, since the second magnet 195 is provided separately from the first magnet 130, the second magnet 195 can be disposed regardless of the arrangement position of the first magnet 130, and thereby the second magnet ( Since the separation distance between the 195 ) and the position sensor 190 may be reduced, the Hall sensing force of the position sensor 190 may be increased.

In general, the position sensor may be arranged to align or overlap with the center of the second coil or the second coil in the first direction. In this arrangement, the position sensor malfunctions or the position sensor may malfunction due to interference of a magnetic field generated in the second coil. An error may occur in the output of On the other hand, since the embodiment uses a separate second magnet 195 for sensing, the position sensor 190 is non-overlapping with the second coil 230 in the first direction, or the second coil in the first direction. Since it can be arranged not to be aligned with the 230 , it is possible to reduce the influence of the magnetic field generated in the second coil 230 , and thereby the position sensor 190 caused by the magnetic field generated in the second coil 230 . ) to prevent malfunction.

The direction of the movement of the AF movable part and the movement of the OIS movable part may be determined based on location information (Gx, Gy, Gz) provided from the motion sensor 820 mounted on the camera module. The camera module having the lens driving device 100 according to the embodiment includes the position information (Gx, Gy, Gz) provided from the motion sensor 820 and the output provided from the position sensor 190 of the lens driving device 100 . Based on , AF feedback driving and OIS feedback driving may be performed.

18 is an exploded perspective view of the camera module 200 according to the embodiment, and FIG. 19 is a block diagram illustrating AF feedback driving and OIS feedback driving of the camera module 200 shown in FIG. 18 .

18 and 19 , the camera module includes a lens barrel 400 , a lens driving device 100 , an adhesive member 710 , a filter 610 , a first holder 600 , a second holder 800 , It may include an image sensor 810 , a motion sensor 820 , a controller 830 , and a connector 840 .

The lens barrel 400 may be mounted on the bobbin 110 of the lens driving device 100 .

The first holder 600 may be disposed under the base 210 of the lens driving device 100 . The filter 610 is mounted on the first holder 600 , and the first holder 600 may include a protrusion 500 on which the filter 610 is mounted.

The adhesive member 710 may couple or attach the base 210 of the lens driving device 100 to the first holder 600 . The adhesive member 710 may serve to prevent foreign substances from being introduced into the lens driving device 100 in addition to the above-described bonding role. For example, the adhesive member 710 may be an epoxy, a thermosetting adhesive, or an ultraviolet curable adhesive.

The filter 610 may serve to block light of a specific frequency band in light passing through the lens barrel 400 from being incident on the image sensor 810 . The filter 610 may be an infrared cut filter, but is not limited thereto. In this case, the filter 610 may be disposed to be parallel to the x-y plane. A hollow may be formed in a portion of the first holder 600 on which the filter 610 is mounted so that light passing through the filter 610 may be incident on the image sensor 810 .

The second holder 800 may be disposed under the first holder 600 , and the image sensor 810 may be mounted on the second holder 600 . The image sensor 810 is a portion on which the light passing through the filter 610 is incident to form an image included in the light.

The second holder 800 may include various circuits, elements, controllers, etc. to convert an image formed on the image sensor 810 into an electrical signal and transmit it to an external device.

The second holder 800 may be implemented as a circuit board on which an image sensor may be mounted, a circuit pattern may be formed, and various elements may be coupled thereto.

The filter 610 and the image sensor 810 may be spaced apart to face each other in the first direction.

The motion sensor 820 may be mounted on the second holder 800 , and may be electrically connected to the controller 830 through a circuit pattern provided on the second holder 800 .

The motion sensor 820 outputs positional information by the movement of the camera module 200 , for example, rotational angular velocity information. The motion sensor 820 may be implemented as a 3-axis (X-axis, Y-axis, Z-axis) gyro sensor or a 3-axis angular velocity sensor.

The motion sensor 820 may output information such as a rate-of-turn, a rotation angular velocity, and an acceleration. For example, the motion sensor 820 may detect an angular velocity (eg, rotational angular velocity) of the movement of the camera module 200 and output rotational angular velocity data according to the detection result.

For example, the motion sensor 820 may output X-axis position information (Gx), Y-axis position information (Gy), and Z-axis position information (Gz) of the movement of the camera module 200 .

The controller 830 is mounted on the second holder 800 , and may be electrically connected to the position sensor 190 , the first coil 120 , and the second coil 230 of the lens driving apparatus 100 . For example, the second holder 800 may be electrically connected to the circuit board 250 of the lens driving device 100 , and the controller 820 mounted on the second holder 800 is positioned through the circuit board 250 . The sensor 190 , the first coil 120 , and the second coil 230 may be electrically connected.

Based on the position information Gx, Gy, and Gz provided from the motion sensor 820 , and the output FD provided from the position sensor 190 of the lens driving device 100 , the controller 830 may control the lens driving device. The first driving signal DI1 for driving the AF feedback of ( 100 ) and the second driving signal DI2 for driving the OIS feedback may be output.

First to third cases for generating the first driving signal DI1 and the second driving signal DI2 will be described.

The first case relates to AF feedback driving when there is no movement of the OIS movable part and there is no change in the magnetic force of the third magnet 195 accordingly.

Based on the position information (Gx, Gy, Gz) provided from the motion sensor 820, when there is no movement of the camera module 20, the output of the position sensor 190 changes in the first direction of the AF movable unit ( For example, it may be due to a change in the strength of the magnetic force of the second magnet 185 due to the movement of the bobbin 110 , and based on the change in the output of the position sensor 190 , the controller 830 controls the first driving A signal DI1 may be generated.

The second case relates to OIS feedback driving when there is no movement of the AF moving part and there is no change in the magnetic force of the second magnet 185 accordingly. The directionality will be described in the XYZ plane with the center 406a of the third magnet 195 aligned with the center 241 of the position sensor 190 at the initial position as the origin (0, 0, 0).

As the OIS movable part moves due to hand shake, the center 241 of the position sensor 190 may move to any position on the XYZ plane. However, since the output of the position sensor 190 indicates only the size, in which direction it actually moved can be known based on the position information (Gx, Gy, Gz) of the motion sensor 820 .

For example, when the OIS movable part moves from the first point (x1, y1, z1) to the second point (x2, y2, z2), the OIS movable part is moved by the position information (Gx, Gy, Gz) of the motion sensor 820 . The position change may be known, and the position sensor 190 may generate an output according to a result of detecting a change in the strength of the magnetic force of the third magnet 195 corresponding to the position change of the OIS movable part. At this time, the position change of the OIS movable unit and the output of the position sensor 190 may be matched 1:1, and this matching information may be stored in the storage device or the control unit of the camera module.

In the second case, it may be due to a change in the strength of the magnetic force of the third magnet 195 due to the movement of the OIS movable part (eg, the housing 140), and the position information (Gx, Gy, Gz) and the position sensor Based on the change in the output of 190 , the controller 830 may generate the second driving signal DI2 .

The third case is a case in which both the movement of the AF movable part and the movement of the OIS movable part exist, and the position sensor 190 detects a change in the magnetic force of the second magnet 185 according to the movement of the AF movable part, and the second according to the movement of the OIS movable part. All changes in the magnetic force of the 3 magnets 195 may be detected.

As for the output of the position sensor 190 in the third case, a change in the magnetic force of the second magnet 185 according to the movement of the AF movable part may be considered in the output of the position sensor 190 in the second case.

Based on the position information (Gx, Gy, Gz) of the motion sensor 820 , the output of the position sensor 190 , and mapping information stored in advance for the second case, the controller 830 is configured to perform AF feedback driving. The first driving signal DI1 and the second driving signal DI2 for driving the OIS may be generated.

For example, in the third case, based on the position information (Gx, Gy, Gz) of the motion sensor 820 , it is possible to know a change in the position of the OIS driving, and the controller 830 controls the output of the position sensor 190 and mapping information The second driving signal DI2 may be generated based on the result of comparing .

The output of the position sensor 190 in the third case is different from the mapping information.

Since the difference between the output of the position sensor 190 and the mapping information in the third case is due to a change in the magnetic force of the second magnet 185 due to the movement of the AF moving part, the difference between the output of the position sensor 190 and the mapping information A change in the position of the AF moving unit may be calculated based on , and the controller 830 may generate the first driving signal DI1 based on the calculated position change of the AF moving unit.

Alternatively, in another embodiment, in the case of OIS driving, since the movement in the Z-axis is insignificant compared to the movement in the X-axis and the Y-axis, a change in the position of the OIS movable part can be known by using the Gx and Gy position information. That is, based on the position information of Gx and Gy provided from the motion sensor 820 , the output of the position sensor 190 , and matching information, as described in the first to third cases, the controller 830 controls the first and second The second driving signals DI1 and DI2 may be generated. For example, the mapping information may be information corresponding to an output of the position sensor 190 set based on the position information of Gx and Gy and a change in the position of the OIS movable part.

The connector 840 is electrically connected to the second holder 800 and may include a port for electrically connecting to an external device.

The motion sensor 820 may generate X-axis location information (Gx), Y-axis location information (Gy), and Z-axis location information (Gz) of the camera module 200 according to the movement of the camera module 200 . .

Based on the position information Gx, Gy, and Gz provided from the motion sensor Gy, and the output FD provided from the position sensor 190 of the lens driving device 100, the controller 830 is a lens driving device A first driving signal DI1 for driving the first coil 120 of 100 or a second driving signal DI2 for driving the second coil 230 of the lens driving apparatus 100 may be output. .

For example, the controller 830 may set a target position for AF feedback driving or a target position for OIS feedback driving based on the position information Gx, Gy, and Gz.

Also, the controller 830 may extract current position information of the lens driving apparatus 100 based on the position information Gx, Gy, and Gz, the output FD of the position sensor 190, and the mapping information.

In addition, the controller 830 may include a first driving signal DI1 for AF feedback driving or a second driving signal DI1 for OIS feedback driving to minimize an error with the target position based on the set target position and current position information. DI2) can be produced. In this case, the first and second driving signals DI1 and DI2 may be driving currents, but are not limited thereto.

The control unit 830 illustrated in FIG. 19 includes a first driving signal DI1 for driving the first coil 120 or a second driving signal DI2 for driving the second coil 230 , for example, driving It may be implemented by directly generating a current, but is not limited thereto.

In another embodiment, the control unit 830 may generate only control signals for AF feedback driving or OIS feedback driving based on the position information ((Gx, Gy, Gz) and the output FD of the position sensor 190 ). In addition, separate drivers capable of generating the first and second driving power supplies DI1 and DI2 based on the control signals may be further included.

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 a person skilled 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: first magnet 140: housing
150: upper elastic member 160: lower elastic member
170: first circuit board 185: second magnet
190: position sensor 195: third magnet
210: base 220: support member
230: second coil 250: circuit board
300: cover member 400: lens barrel
610: first holder 610: filter
710: adhesive member 810: image sensor
820: motion sensor 830: control unit
840: connector.

Claims (12)

a bobbin to which the lens is mounted;
a housing for accommodating the bobbin;
a first magnet disposed on the housing;
a first coil disposed on the bobbin to interact with the first magnet;
a second magnet disposed on the bobbin;
a second coil interacting with the first magnet to move the housing;
a position sensor disposed in the housing; and
a third magnet disposed under the housing;
The third magnet,
It is a magnet including divided first to fourth segments, and a non-magnetic barrier rib disposed between the divided first to fourth segments,
The position sensor detects the strength of the magnetic force of the second magnet and the strength of the magnetic force of the third magnet,
wherein the position sensor does not overlap the second coil in a first direction parallel to an optical axis direction of the lens. According to claim 1,
In the initial position, the center of the third magnet is aligned with the center of the position sensor, and the center of the third magnet is the center of the non-magnetic partition wall positioned between adjacent edges of the first to fourth segments. . According to claim 1,
One edge of each of the divided first to fourth segments is adjacent to each other, and each of the divided first to fourth segments has a neighboring segment and two surfaces facing each other. According to claim 1,
Two of the divided first to fourth segments are N poles, and the other two segments are S poles. According to claim 1,
The position sensor overlaps the third magnet in a first direction parallel to the optical axis of the lens, and does not overlap the first magnet. 6. The method of claim 5,
The position sensor overlaps the second magnet in a direction perpendicular to the first direction, and does not overlap the first coil in a direction perpendicular to the first direction. According to claim 1,
upper and lower elastic members coupled to the bobbin and the housing;
a circuit board disposed under the second coil;
a base disposed under the circuit board; and
and a support member supporting the housing and connecting at least one of the upper elastic member and the lower elastic member to the circuit board. 8. The method of claim 7,
The third magnet is a lens driving device disposed in a seating groove provided on an upper surface of the base. delete The lens driving device according to any one of claims 1 to 8;
a motion sensor for outputting position information by movement; and
Based on the position information and the output of the position sensor of the lens driving device, generating a first driving signal for auto-focusing feedback driving of the lens driving device or a second driving signal for correcting hand shake of the lens driving device A camera module including a control unit. 11. The method of claim 10,
the first driving signal is provided to a first coil of the lens driving device;
The second driving signal is provided to a second coil of the lens driving device. housing;
a bobbin disposed within the housing;
a first magnet disposed on the housing;
a first coil disposed on the bobbin to interact with the first magnet;
a second magnet disposed on the bobbin;
a second coil interacting with the first magnet to move the housing;
a position sensor disposed in the housing; and
a third magnet disposed under the housing;
The third magnet,
It is a magnet including divided first to fourth segments, and a non-magnetic barrier rib disposed between the divided first to fourth segments,
The position sensor detects the strength of the magnetic force of the second magnet and the strength of the magnetic force of the third magnet,
wherein the position sensor does not overlap the second coil in a first direction parallel to an optical axis direction.

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