KR102432734B1 - Lens moving unit - Google Patents

Abstract

The embodiment provides a bobbin in which a first coil is disposed on an outer circumferential surface of the bobbin, a first position sensor disposed to be spaced apart from the first coil on an outer circumferential surface of the bobbin, a first magnet disposed to face the first position sensor, and the first coil a second magnet disposed to face the first coil and moving the bobbin in a direction parallel to the optical axis by electromagnetic interaction with the first coil; a housing supporting the first magnet and the second magnet; and the bobbin; and upper and lower elastic members coupled to the housing, wherein the first position sensor moves together with the bobbin, and detects the displacement of the bobbin according to a result of detecting the strength of the magnetic field of the first magnet.

Description

Lens drive unit {LENS MOVING UNIT}

The embodiment relates to a lens driving device.

Since it is difficult to apply the technology of a voice coil motor (VCM) used in an existing general camera module to a camera module for ultra-small size and low power consumption, research related thereto has been actively conducted.

In the case of a camera module mounted on a small electronic product such as a smartphone, the camera module may be frequently impacted during use, and the camera module may be slightly shaken according to a user's hand shake while shooting. In consideration of such a point, the development of a technology for additionally installing an anti-shake means to a camera module is recently required.

Various methods for preventing hand shake have been studied, and as one of them, there is a technology capable of correcting hand shake by moving an optical module in the x-axis and y-axis corresponding to a plane perpendicular to the optical axis. In the case of this technology, since the optical system is moved and adjusted in a plane perpendicular to the optical axis for image correction, the structure is complicated and not suitable for miniaturization.

In addition, there is a need to accurately and quickly focus the optical module.

The embodiment provides a lens driving device capable of preventing a malfunction or error of the position sensor due to the influence of the magnetic field of the first coil.

A lens driving apparatus according to an embodiment includes: a bobbin in which a first coil is disposed on an outer circumferential surface; a first position sensor disposed on an outer circumferential surface of the bobbin to be spaced apart from the first coil; a first magnet disposed to face the first position sensor; a second magnet disposed to face the first coil and configured to move the bobbin in a direction parallel to the optical axis by electromagnetic interaction with the first coil; a housing supporting the first magnet and the second magnet; and upper and lower elastic members coupled to the bobbin and the housing, wherein the first position sensor moves together with the bobbin.

The first position sensor may overlap at least a portion of the first magnet in a direction perpendicular to the optical axis.

In a direction perpendicular to the optical axis, the first position sensor may not overlap the second magnet.

The first coil may be disposed below the outer circumferential surface of the bobbin, and the first position sensor may be disposed above the outer circumferential surface of the bobbin.

The first magnet may overlap the second magnet in a direction parallel to the optical axis.

The first magnet may not overlap the second magnet in a direction parallel to the optical axis.

The first magnet may not overlap the second magnet in a direction parallel to a direction in which the first position sensor and the first magnet face each other.

The first position sensor may be electrically connected to at least one of the upper elastic member and the lower elastic member.

The lens driving device may include a second coil disposed to face the second magnet; a circuit board on which the second coil is disposed; a base disposed under the circuit board; a plurality of support members supporting the housing to be movable in a direction perpendicular to the optical axis with respect to the base and connecting at least one of the upper and lower elastic members to the circuit board; and a second position sensor configured to detect a displacement of the housing with respect to the base in a direction perpendicular to the optical axis.

The first position sensor may detect the displacement of the bobbin according to a result of detecting the strength of the magnetic field of the first magnet.

A lens driving device according to another embodiment includes a bobbin in which a first coil is disposed on an outer circumferential surface; a sensor substrate spaced apart from the first coil and disposed on an outer circumferential surface of the bobbin; a first position sensor disposed on the sensor substrate; a first magnet disposed to face the first position sensor; a second magnet disposed to face the first coil and configured to move the bobbin in a direction parallel to the optical axis by electromagnetic interaction with the first coil; a housing supporting the first magnet and the second magnet; and upper and lower elastic members coupled to the bobbin and the housing, wherein the first position sensor moves together with the bobbin.

The sensor substrate may have a mounting groove on an outer circumferential surface, and the first position sensor may be disposed in the mounting groove.

The sensor substrate may be electrically connected to at least one of the upper elastic member and the lower elastic member.

The sensor substrate is disposed on the outer peripheral surface of the bobbin, the body in which the first position sensor is disposed; elastic member contact portions protruding from the body and electrically connected to at least one of the upper elastic member and the lower elastic member; and a circuit pattern formed on the body and electrically connected to the first position sensor and the elastic member contact portions.

A support groove into which the sensor substrate is inserted may be formed between the outer peripheral surface and the inner peripheral surface of the bobbin.

An accommodating groove for accommodating the first position sensor disposed on the sensor substrate inserted into the support groove may be formed on an outer circumferential surface of the bobbin.

The housing includes first sides on which the second magnet is disposed, and second sides disposed between the first sides, wherein an outer circumferential surface of the bobbin has a first side surface corresponding to the first sides of the housing and second side surfaces disposed between the first side surfaces.

The first magnet may be disposed on any one of first sides of the housing, and the first position sensor corresponds to a first side of the housing on which the first magnet is disposed among the first sides of the bobbin It can be placed in any one of the

Alternatively, the first magnet may be disposed on any one of the second sides of the housing, and the first position sensor may be disposed on a second side of the housing on which the first magnet is disposed among the second sides of the bobbin. It can be placed in any one of the corresponding ones.

The first position sensor may be a hall sensor.

The embodiment may prevent a malfunction or error of the position sensor due to the influence of the magnetic field of the first coil.

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 combined perspective view of the lens driving device with the cover member of FIG. 1 removed.
4 is an exploded perspective view of the bobbin, the first coil, the second magnet, the first position sensor, and the sensor substrate shown in FIG. 1 .
5A is a plan view of the bobbin and the magnet shown in FIG. 4 .
5B is a perspective view illustrating the sensor substrate shown in FIG. 4 according to another embodiment;
5C is a rear perspective view of the first position sensor and the sensor substrate shown in FIG. 4 according to an embodiment;
FIG. 6 shows a top perspective view of the housing shown in FIG. 1 ;
7 is a bottom exploded perspective view of the housing, the first magnet, and the second magnet shown in FIG. 1 .
FIG. 8 is a cross-sectional view taken along line II' shown in FIG. 3 .
FIG. 9 is a plan perspective view showing the bobbin, the housing, the upper elastic member, the first position sensor, the sensor substrate, and the plurality of support members of FIG. 1 coupled thereto.
10 is a bottom perspective view showing the bobbin of FIG. 1, the housing, the lower elastic member, and the plurality of support members are combined.
11 is a combined perspective view of an upper elastic member, a lower elastic member, a first position sensor, a sensor substrate, a base, a support member, and a circuit board illustrated in FIG. 1 .
12 is an exploded perspective view of a base, a second coil, and a circuit board shown in FIG. 1 .
13A illustrates an embodiment of a disposition relationship of a first coil, a first position sensor, a first magnet, and a second magnet of FIG. 1 .
13B illustrates another embodiment of the arrangement relationship of the first coil, the first position sensor, the first magnet, and the second magnet of FIG. 1 .
14 is a graph illustrating an error of a position sensor for AF adjacent to a coil for AF.
15 is a diagram illustrating an arrangement of the first position sensor and the first magnet shown in FIG. 1 according to another exemplary embodiment.
FIG. 16 shows a seating groove of the housing for mounting the first magnet shown in FIG. 15 .
FIG. 17 is a cross-sectional view taken along line II′ of FIG. 3 for the embodiment shown in FIGS. 15 and 16 .

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.

Hereinafter, a lens driving apparatus according to an embodiment will be described with reference to the accompanying drawings. For convenience of description, the lens driving apparatus according to the embodiment is described using a Cartesian coordinate system (x, y, z), but may be described using other coordinate systems, and the embodiment is not limited thereto. In each figure, the x-axis and y-axis mean a direction perpendicular to the z-axis, which is the optical axis direction, the z-axis direction, which is the optical axis direction, is called a 'first direction', and the x-axis direction is called a 'second direction', and y The axial direction may be referred to as a 'third direction'.

A 'shake correction device' applied to a small camera module of a mobile device such as a smartphone or tablet PC is a device that prevents 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. It may mean a device configured to be able to

In addition, 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. The lens driving device according to the embodiment moves the optical module composed of at least one lens in a first direction parallel to the optical axis, or in the first direction. A handshake correction operation and/or an auto-focusing operation may be performed by moving with respect to a surface formed by the second and third directions perpendicular to the .

FIG. 1 is a schematic perspective view of a lens driving device 100 according to an embodiment, and FIG. 2 is an exploded perspective view of the lens driving device 100 shown in FIG. 1 .

1 and 2 , the lens driving device 100 includes a cover member 300 , an upper elastic member 150 , a sensor substrate 180 , a first position sensor 170 , a first coil 120 , A bobbin 110 , a housing 140 , a first magnet 190 , a second magnet 130 , a lower elastic member 160 , a plurality of support members 220 , a second coil 230 . ), a circuit board 250 , a second position sensor 240 , and a base 210 .

The bobbin 110 , the first coil 120 , the second magnet 130 , the housing 140 , the upper elastic member 150 , and the lower elastic member 160 may constitute the first lens driving unit. Also, the first lens driving unit may further include a first position sensor 170 . The first lens driving unit may be for auto focus.

In addition, the second coil 230 , the circuit board 250 , the base 210 , and the plurality of support members 220 may form a second lens driving unit. Also, the second lens driving unit may further include a second position sensor 240 . The second lens driving unit may be for hand-shake correction.

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 190 , and the second in the receiving space formed together with the base 210 . The magnet 130 , the lower elastic member 160 , the plurality of support members 220 , the second coil 230 , and the circuit board 250 are accommodated.

The cover member 300 may have an open lower portion and may have a box shape including an upper end and sidewalls, and a lower portion of the cover member 300 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 to the second magnet 130 , but may be formed of a magnetic material to function as a yoke.

3 is a combined perspective view of the lens driving device 100 with the cover member 300 of FIG. 1 removed, and FIG. 4 is the bobbin 110, the first coil 120, and the second magnet 130 shown in FIG. ; 130-1, 130-2, 130-3, 130-4), an exploded perspective view of the first position sensor 170 and the sensor substrate 180 are shown.

Next, the bobbin 110 will be described.

Referring to FIGS. 3 and 4 , the bobbin 110 is disposed inside the housing 140 to be described later, and by the electromagnetic interaction between the first coil 120 and the second magnet 130 , the optical axis direction or the optical axis It is movable in a first direction parallel to, for example, a Z-axis direction.

Although not shown, the bobbin 110 may include a lens barrel (not shown) in which at least one lens is installed, and the lens barrel may be coupled to the inside of the bobbin 110 in various ways. .

The bobbin 110 may have a hollow structure for mounting a lens or a lens barrel. The hollow shape may be a circle, an ellipse, or a polygon, but is not limited thereto.

The bobbin 110 may include first and second protrusions 111 and 112 .

The first protrusion 111 of the bobbin 110 may include a guide portion 111a and a first stopper 111b.

The guide part 111a of the bobbin 110 may serve to guide the installation position of the upper elastic member 150 . For example, as illustrated in FIG. 3 , the guide part 111a of the bobbin 110 may guide a path through which the first frame connection part 153 of the upper elastic member 150 passes.

For example, the plurality of guide portions 111a may protrude in second and third directions perpendicular to the first direction. In addition, as illustrated, the guide part 111a may be provided in a symmetrical structure with respect to the center of the bobbin 110 on the plane formed by the x-axis and the y-axis, and interference with other components is excluded as illustrated. It may be provided as an asymmetric structure.

The second protrusion 112 of the bobbin 110 may be formed to protrude in second and third directions orthogonal to the first direction. In addition, the upper surface 112a of the second protrusion 112 of the bobbin 110 may have a shape in which the first inner frame 151 of the upper elastic member 150 to be described later can be seated.

The first stopper 111b and the second protrusion 112 of the first protrusion 111 of the bobbin 110 are positioned in a first direction or a first direction in which the bobbin 110 is parallel to the optical axis for the auto-focusing function. When moving in a parallel direction, even if the bobbin 110 moves beyond a prescribed range due to an external impact, etc., the bottom surface of the body of the bobbin 110 directly collides with the upper surface of the base 210 and the circuit board 250 . can play a role in preventing

To this end, the first stopper 111b of the bobbin 110 may be formed to protrude more than the guide portion 111a of the bobbin 110 in the circumferential second or third direction from the outer circumferential surface of the bobbin 110, The second protrusion 112 of the bobbin 110 may also protrude further laterally than the upper surface 112a on which the upper elastic member 150 is seated.

The bobbin 110 may include a support groove 114 provided between the inner peripheral surface 110a and the outer peripheral surface 110b of the bobbin 110 so that the sensor substrate 180 can be inserted in the first direction (z-axis direction). can For example, the support groove 114 of the bobbin 110 may be inserted in the first direction (z-axis direction) of the sensor substrate 180 so that the inner peripheral surface 110a of the bobbin 110 and the first and second protrusions 111 and 112 are inserted. ) can be provided between

The bobbin 110 may have a receiving groove 116 suitable for accommodating the first position sensor 170 disposed, coupled, or mounted on the sensor substrate 180 .

In addition, the bobbin 110 is located in the space between the first and second protrusions 111 and 112 of the bobbin 110 so that the first position sensor 170 mounted on the sensor substrate 180 can be inserted in the first direction. A receiving groove 116 provided may be provided.

The bobbin 110 may have a support protrusion 117 (refer to FIG. 8 ) coupled to and fixed to the lower elastic member 160 on its lower surface.

When the contact state between the bottom surfaces of the first and second protrusions 111 and 112 of the bobbin 110 and the bottom surface 146a of the first seating groove 146 of the housing 140 is set to the initial position, auto-focusing The function can be controlled like one-way control in a conventional voice coil motor (VCM). That is, when the current is supplied to the first coil 120, the bobbin 110 rises, and when the supply of current is cut off, the bobbin 120 descends, so that the auto-focusing function can be implemented.

However, when a position in which the bottom surface of the first and second protrusions 111 and 112 of the bobbin 110 and the bottom surface 146a of the first seating groove 146 are spaced apart by a predetermined distance is set as the initial position, the auto-focusing function can be controlled according to the direction of the current, like the bidirectional control in a conventional voice coil motor. That is, the auto-focusing function may be implemented by moving the bobbin 110 in an upward or downward direction parallel to the optical axis. For example, when a forward current is applied, the bobbin 110 may move upward, and when a reverse current is applied, the bobbin 110 may move downward.

Next, the first coil 120 will be described.

The first coil 120 is disposed on the outer peripheral surface 110b of the bobbin 110 (refer to FIG. 4 ). The first coil 120 may be disposed so as not to overlap the first position sensor 170 in a direction perpendicular to the optical axis.

For example, so that the first coil 130 and the first position sensor 170 do not interfere with or overlap each other in a direction perpendicular to the optical axis, the first position sensor 170 is disposed above the outer circumferential surface 110a of the bobbin 110 . The first coil 120 may be disposed below the outer peripheral surface 110a of the bobbin 110 .

The first coil 120 may be wound to surround the outer peripheral surface 110a of the bobbin 110 in the direction of rotation about the optical axis as shown in FIG. 4 .

After the first coil 120 is wound on the outer circumferential surface of the bobbin 110 by a worker or a machine, both ends of the first coil 120, the line of sight and the vertical line, protrude in the first direction from the bottom of the bobbin 110, respectively. It can be wound around a pair of winding projections 119 and fixed.

In this case, the position of the end of the first coil 120 wound around the winding protrusion 119 may be changed according to the operator. As illustrated in FIG. 11 , a pair of winding protrusions 119 may be disposed at positions symmetrical with respect to the center of the bobbin 110 , but the embodiment is not limited thereto.

As illustrated in FIG. 8 , the first coil 120 may be inserted and coupled to the coil groove 118 formed outside the bobbin 110 .

As illustrated in FIG. 2 , the first coil 120 may be provided as an angled ring-shaped coil block, but is not limited thereto. According to another embodiment, the first coil 120 may be wound directly on the outer circumferential surface of the bobbin 110 or may be wound using a coil ring (not shown). Here, the coil ring may be coupled to the bobbin 110 as in a state in which the sensor substrate 180 is fitted and fixed in the support groove 114 of the bobbin 110 , and the first coil 120 is the bobbin 110 . Instead of being wound or placed on the outside of the In any case, the line of sight and the vertical wire of the first coil 120 may be wound and fixed around the winding protrusion 119 , and other configurations are the same.

The first coil 120 may be formed in an approximately octagonal shape as shown in FIG. 2 . This corresponds to the shape of the outer peripheral surface of the bobbin 110 , because the bobbin 110 has an octagonal shape as illustrated in FIG. 5A .

In addition, at least four surfaces of the first coil 120 may be provided in a straight line, and an edge portion connecting these surfaces may also be provided in a straight line, but the present invention is not limited thereto and may be formed in a round shape.

The first coil 120 may be disposed so that a portion formed in a straight line in the first coil 120 becomes a surface corresponding to the second magnet 130 . Also, the surface of the second magnet 130 corresponding to the first coil 120 may have the same curvature as the curvature of the first coil 120 .

That is, if the first coil 120 is a straight line, the corresponding surface of the second magnet 130 may be a straight line. If the first coil 120 is curved, the corresponding second magnet 130 has a curved surface. can be Also, even if the first coil 120 is curved, the corresponding surface of the second magnet 130 may be a straight line or vice versa.

When a current is supplied, the first coil 120 may form an electromagnetic force through interaction with the second magnet 130 , and the formed electromagnetic force moves the bobbin 110 in the first direction or in a direction parallel to the first direction. can do it

The first coil 120 may be configured to correspond to the second magnet 130 , such that the second magnet 130 is configured as a single body so that the entire surface facing the first coil 120 has the same polarity. When provided, the surface corresponding to the first coil 120 and the second magnet 130 may be configured to have the same polarity.

When the second magnet 130 is divided into two or four in a plane perpendicular to the optical axis, and thus the surfaces facing the first coil 120 are divided into two or more, the first coil 120 is also divided into two or more parts. It is also possible to be divided into two magnets 130 and the corresponding number.

Next, the first position sensor 170 and the sensor substrate 180 will be described.

The first position sensor 170 may be disposed, coupled, or mounted on the bobbin 110 to move together with the bobbin 110 .

When the bobbin 110 moves in a first direction parallel to the optical axis or a direction parallel to the first direction, the first position sensor 170 may move together with the bobbin 110 . In addition, the first position sensor 170 may sense the strength of the magnetic field of the first magnet 190 according to the movement of the bobbin 110 , and may output a feedback signal according to the sensing result. The displacement of the bobbin 110 in the first direction or in a direction parallel to the first direction may be adjusted using the feedback signal.

The first position sensor 170 may be electrically connected to the sensor substrate 180 , and may be implemented in the form of a driver including a Hall sensor, or may be implemented as a single position detection sensor such as a Hall sensor.

The first position sensor 170 may be disposed, coupled, or mounted on the bobbin 110 in various forms, and the first position sensor 170 may be disposed, coupled or mounted depending on the form in which the first position sensor 170 is disposed, coupled or mounted. can be applied with current in various ways.

The first position sensor 170 may be disposed, coupled, or mounted on the outer peripheral surface of the bobbin 110 . The first position sensor 170 may be disposed, coupled, or mounted on the sensor substrate 180 , and the sensor substrate 180 may be coupled to the bobbin 110 . That is, the first position sensor 170 may be indirectly disposed, coupled, or mounted on the bobbin 110 through the sensor substrate 180 .

The first position sensor 170 may be electrically connected to at least one of an upper elastic member 150 and a lower elastic member 160 to be described later. For example, the first position sensor 170 may be electrically connected to the upper elastic member 150 .

FIG. 5A is a plan view of the bobbin 110 and the magnets 130:130-1, 130-2, 130-3, and 130-4 shown in FIG. 4, and FIG. 5B is the sensor substrate 180 shown in FIG. ) is a perspective view according to another embodiment, and FIG. 5c is a rear perspective view of the first position sensor 170 and the sensor substrate 180 shown in FIG. 4 according to an embodiment.

4 and 5A , the sensor substrate 180 is mounted on the bobbin 110 and can move together with the bobbin 110 in an optical axis or a direction parallel to the optical axis.

For example, the sensor substrate 180 may be inserted into the support groove 114 of the bobbin 110 and coupled to the bobbin 110 . It is sufficient if the sensor substrate 180 is suitable to be mounted on the bobbin 110 , and although a ring shape is exemplified in FIG. 4 , the present invention is not limited thereto.

The first position sensor 170 may be supported by being attached to the front surface of the sensor substrate 180 using an adhesive member such as epoxy or double-sided tape.

The outer circumferential surface of the bobbin 110 is disposed between the first side portions 141 of the housing 140 on which the second magnet 130 is disposed and the corresponding first side surfaces S1 and the first side surfaces S1 . and second side surfaces S2 connecting the first side surfaces S1 to each other.

The first position sensor 170 may be disposed on any one of the first side surfaces S1 of the bobbin 110 . For example, the receiving groove 116 of the bobbin 110 may be provided on any one of the first side surfaces S1 of the bobbin 110 , and the first position sensor 170 is the receiving groove ( 116).

Referring to FIG. 5B , the first position sensor 170 may be disposed, coupled, or mounted in various forms on the upper side A1 , the middle side A2 , or the lower side A3 of the outer peripheral surface of the sensor substrate 180 . In this case, the first position sensor 170 may receive a current from the outside through the circuit of the sensor substrate 180 .

For example, the first position sensor 170 may be disposed, coupled, or mounted on the upper side A1 of the outer peripheral surface of the sensor substrate 180 . This is by disposing the first position sensor 170 away from the first coil 120 so that the first position sensor 170 is not affected by the magnetic field of the first coil 120 in the high-frequency region, so that the first position sensor This is to prevent malfunctions and errors of 170 .

As shown in FIG. 5B , the sensor substrate 180 may have a mounting groove 183 on the upper side A1 of the outer circumferential surface, and the first position sensor 170 may have a mounting groove 183 of the sensor substrate 180 . ) can be placed, combined, or mounted in

A tapered inclined surface (not shown) may be provided on at least one surface of the mounting groove 183 of the sensor substrate 180 in order to more smoothly inject epoxy for assembling the first position sensor 170 . . In addition, a separate epoxy may not be injected into the mounting groove 183 of the sensing substrate 180 , but the placement force, coupling force, or mounting force of the first position sensor 170 may be increased by injecting epoxy or the like. have.

The sensor substrate 180 may include a body 182 , elastic member contact portions 184-1, 184-2, 184-3, and 184-4, and circuit patterns L1, L2, L3, and L4.

When the support groove 114 of the bobbin 110 has the same shape as the outer circumferential surface of the bobbin 110, the body 182 of the sensor substrate 180 inserted into the support groove 114 of the bobbin 110 is the support groove. It may have a shape that is inserted into the 114 and can be fixed.

3 to 5A , the support groove 114 of the bobbin 110 and the body 182 of the sensor substrate 180 may have a circular planar shape, but the embodiment is not limited thereto. According to another embodiment, the support groove 114 of the bobbin 110 and the body 182 of the sensor substrate 180 may have a polygonal planar shape.

Referring to FIG. 5B , the body 182 of the sensor substrate 180 extends in contact with a first segment 182a on which the first position sensor 170 is disposed, coupled, or mounted, and the first segment 182a, and A second segment 182b inserted into the support groove 114 of the bobbin 110 may be included.

The sensor substrate 180 may be easily inserted into the support groove 114 of the bobbin 110 by providing an opening 181 in a portion facing the first segment 182a, but in the embodiment, the sensor substrate ( 180) is not limited to a specific shape.

In addition, the elastic member contact portions 184-1, 184-2, 184-3, and 184-4 of the sensor substrate 180 are capable of contacting the first inner frame 151 from the body 182 of the sensor substrate 180 . The direction, for example, may protrude in a first direction that is an optical axis direction or a direction parallel to the first direction.

The elastic member contact portions 184-1, 184-2, 184-3, and 184-4 of the sensor substrate 180 are portions to be connected to the first inner frame 151 of the upper elastic member 150, which will be described later.

The circuit patterns L1 , L2 , L3 , and L4 of the sensor substrate 180 are formed on the body 182 of the sensor substrate 180 , and the first position sensor 170 and the elastic member contact portions 184 - 1 and 184 - 2 , 184-3, 184-4) can be electrically connected.

For example, the first position sensor 170 may be provided as a Hall sensor, and any sensor capable of detecting the strength of a magnetic field may be used. If the first position sensor 170 is implemented as a Hall sensor, the Hall sensor 170 may have a plurality of pins.

For example, the plurality of pins may include input pins P11 and P12 and output pins P21 and P22. The signal output through the output pins P21 and P22 may be in the form of a current, but the embodiment is not limited thereto, and may be in the form of a voltage.

The input pins P11 and P12 and the output pins P21 and P22 of the first position sensor 170 are connected to the elastic member contact portions 184-1, 184-2, 184 through the circuit patterns L1, L2, L3, and L4. -3 and 184-4) and may be electrically connected to each other, respectively.

For example, referring to FIG. 5C , the first line L1 of the circuit pattern may electrically connect the first input pin P11 and the fourth elastic member contact portion 184-4,

The first line L1 of the circuit pattern may electrically connect the first input pin P11 and the fourth elastic member contact portion 184-4, and the second line L2 of the circuit pattern may be connected to the second input pin ( P12) and the third elastic member contact portion 184-3 may be electrically connected, and the third line L3 of the circuit pattern electrically connects the first output pin P21 and the first elastic member contact portion 184-1. , and the fourth line L4 of the circuit pattern may electrically connect the second output pin P22 and the second elastic member contact portion 184 - 2 .

According to an embodiment, the first to fourth lines (L1, L2, L3, L4) may be formed to be visible to the naked eye, and according to another embodiment, these (L1, L2, L3, L4) are invisible to the naked eye. It may be formed on the body 182 of the sensor substrate 180 to prevent it.

The first position sensor 170 may face or be aligned with the first magnet 190 disposed on the housing 140 .

For example, at least a portion of the first position sensor 170 may overlap the first magnet 190 in a second direction perpendicular to the optical axis and may not overlap the second magnet 130 .

For example, the first position sensor 170 passes through the center of the first position sensor 170 so that an imaginary horizontal line 172 parallel to the second direction perpendicular to the optical axis is aligned at the center of the first magnet 190 . may be disposed, but is not limited thereto.

At this time, the bobbin 110 may move up and down in a first direction or a direction parallel to the first direction, which is the optical axis direction, with a point where the virtual horizontal line 172 coincides with the center of the first magnet 190 as a reference point. Examples are not limited thereto.

In another embodiment, the center of the first position sensor 170 in a second direction perpendicular to the optical axis may be aligned with the center 190 of the first magnet, and at least the first position sensor 170 in a second direction perpendicular to the optical axis ( The center of 170 may not overlap with the second magnet 130 , but the remaining portions except for the center of the first position sensor 170 may overlap with the second magnet 130 .

Also, in another embodiment, the center of the first position sensor 170 in the second direction perpendicular to the optical axis may not overlap the center of the second magnet 130 , but the remaining part except for the center of the second magnet 130 . may overlap the center of the first position sensor 170 .

Next, the housing 140 will be described.

The housing 140 supports the first magnet 190 for sensing and the second magnet 130 for driving, and includes a bobbin 110 therein so that the bobbin 110 can move in a first direction parallel to the optical axis. Accept.

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 .

6 is a top perspective view of the housing 140 shown in FIG. 1, and FIG. 7 is an exploded perspective view of the bottom of the housing 140, the first magnet 190, and the second magnet 130 shown in FIG. 8 is a cross-sectional view taken along the line I-I' shown in FIG. 3 , and FIG. 9 is the bobbin 110 , the housing 140 , the upper elastic member 150 , and the first position sensor 170 of FIG. 1 . ), the sensor substrate 180 and the plurality of support members 220 are coupled to each other in a plan perspective view, and FIG. 10 is the bobbin 110 , the housing 140 , the lower elastic member 160 and the plurality of support members of FIG. 1 . (220) shows a bottom perspective view coupled.

The housing 140 may include a first seating groove 146 formed at a position corresponding to the first and second protrusions 111 and 112 of the bobbin 110 .

The housing 140 may include a space having a first width W1 between the first and second protrusions 111 and 112 of the bobbin 110 and a third protrusion 148 corresponding to the space.

The surface of the third protrusion 148 of the housing 140 facing the bobbin 110 may have the same shape as the side shape of the bobbin 110 . At this time, the first width W1 between the first and second protrusions 111 and 112 of the bobbin 110 shown in FIG. 4 and the third protrusion 148 of the housing 140 shown in FIG. 6 . 2 The width W2 may have a certain tolerance. Due to this, rotation of the third protrusion 148 of the housing 40 between the first and second protrusions 111 and 112 of the bobbin 110 may be restricted. Then, even if the bobbin 110 receives a force in a rotational direction about the optical axis rather than the optical axis direction, the third protrusion 148 of the housing 140 may prevent the bobbin 110 from rotating.

For example, the upper side of the outer periphery of the housing 140 may have a rectangular planar shape, but as illustrated in FIGS. 6 and 7 , the lower side of the inner side may have an octagonal planar shape. The housing 140 may include a plurality of side portions, for example, may include four first side portions 141 and four second side portions 142 .

The first side portions 141 of the housing 140 may correspond to portions where the second magnet 130 is installed. The second side portions 142 of the housing 140 may be positioned between two adjacent first side portions, and may correspond to a portion where the support member 220 is disposed. The first side portions 141 of the housing 140 interconnect the second side portions 142 of the housing 140 , and may include a plane having a predetermined depth.

Each of the first side portions 141 of the housing 140 may have an area equal to or larger than that of the corresponding second magnet 130 .

The housing 140 has a magnet seating part 141a provided on inner surfaces of the first side parts 141 to accommodate the first magnet 190 and the second magnets 130-1, 130-2, 130-3, and 130-4. ) can be provided.

Each of the second magnets 130 - 1 , 130 - 2 , 130 - 3 and 130 - 4 may be fixed to a magnet seating portion 141a provided on a corresponding one of the first side portions 141 of the housing 140 .

The magnet seating portion 141a of the housing 140 may be formed in a groove corresponding to the size of the second magnet 130 , and at least three surfaces, that is, both sides and the upper surface, face the second magnet 130 . can be placed.

An opening may be formed on the bottom surface of the magnet seating portion 141a of the housing 140 , that is, on a surface facing the second coil 230 to be described later, and the second magnet 130 fixed to the magnet seating portion 141a. ) may directly face the second coil 230 .

The second magnet 130 may be fixed to the magnet seating portion 141a of the housing 140 with an adhesive, but is not limited thereto, and an adhesive member such as a double-sided tape may be used.

Alternatively, instead of forming the magnet seating portion 141a of the housing 140 as a concave groove as shown in FIG. 7 , a portion of the second magnet 130 may be formed as a mounting hole that can be exposed or fitted.

The first magnet 190 may be disposed to face the first position sensor 170 in a second direction perpendicular to the optical axis. For example, the first magnet 190 may be disposed on any one of the first sides of the housing 140 , and the first position sensor 170 may be disposed on the first magnet 190 of the first sides of the bobbin 110 . ) may be disposed on any one corresponding to the first side of the housing disposed.

For example, the first magnet 190 may be fixed to the magnet seating portion 141a of the housing 140 to be disposed on the second magnet 130 .

For example, the first magnet 190 may be disposed on any one (eg, 130-1) of the second magnets 130-1, 130-2, 130-3, and 130-4.

The first magnet 190 may contact any one of the second magnets (eg, 130 - 1 ), but is not limited thereto. In another embodiment, the first magnet 190 may be disposed to be spaced apart from the second magnet (eg, 130-1), and for this purpose, the housing 140 separates the second magnet from the first magnet (eg, 130). It may be provided with a separate magnet seating portion (not shown) for accommodating it. That is, a portion of the housing 140 may be disposed between the first magnet 190 and the second magnet (eg, 130 - 1 ).

The first side portion 141 of the housing 140 may be disposed parallel to the side surface of the cover member 300 . Also, the first side portion 141 of the housing 140 may have a larger surface than the second side portion 142 . The second side portion 142 of the housing 140 may form a path through which the support member 220 passes. An upper portion of the second side portion 142 of the housing 140 may include a first through hole 147 . The support member 220 may be connected to the upper elastic member 150 through the first through hole 147 .

In addition, in order to prevent a direct collision with the inner surface of the cover member 300 shown in FIG. 1 , a second stopper 144 may be provided at an upper end of the housing 140 .

The housing 140 may include at least one first upper support protrusion 143 on the upper surface for coupling with the upper elastic member 150 .

For example, the first upper support protrusion 143 of the housing 140 may be formed on the upper surface of the housing 140 corresponding to the second side portion 142 of the housing 140 . The first upper support protrusion 143 of the housing 140 may have a hemispherical shape as illustrated, or alternatively may have a cylindrical shape or a prismatic shape, but is not limited thereto.

The housing 140 may have a support protrusion 145 coupled to and fixed to the lower elastic member 160 on its lower surface.

In order to form a path through which the support member 220 passes, as well as to secure a space for filling the gel-type silicone that can serve as a damping member, the housing 140 is formed on the first side portion 142 of the second side 142 . It may be provided with a groove (142a). That is, damping silicon may be filled in the groove 142a of the housing 140 .

The housing 140 may include a plurality of third stoppers 149 protruding from the side surface. The third stopper 149 is for preventing the housing 140 from colliding with the cover member 300 when it moves in the second and third directions.

In order to prevent the bottom surface of the housing 140 from colliding with the base 210 and/or the circuit board 250 to be described later, the housing 140 may further include a fourth stopper (not shown) protruding from the lower surface. can Through this configuration, the housing 140 may be spaced apart from the base 210 in the lower part and spaced apart from the cover member 300 in the upper part to maintain the height in the optical axis direction without up-and-down interference. Accordingly, the housing 140 may perform the shifting operation in the second and third directions, which are front, rear, left, and rear directions on a plane perpendicular to the optical axis.

Next, the first magnet 190 and the second magnet 130 will be described.

The second magnet 130 may be disposed in the housing 140 to correspond to the first coil 120 . The second magnet 130 may be accommodated and supported inside the first side portion 141 of the housing 140 as shown in FIG. 7 .

For example, referring to FIG. 8 , the second magnet 130 may be disposed on the magnet seating portion 141a of the housing 140 to overlap the first coil 120 in a direction perpendicular to the optical axis.

The first and second magnets 190 and 130 are accommodated inside the first side 141 of the housing 140 , but are not limited thereto.

In another embodiment, the first and second magnets 190 and 130 may be disposed on the outside of the first side 141 of the housing 140 or inside or outside of the second side 142 of the housing 140 . have.

Also, in another embodiment, the first magnet 190 may be accommodated inside the first side portion 141 of the housing 140 , and the second magnet 190 is the first side portion 141 of the housing 140 . It may be accommodated outside, or vice versa.

Also, in another embodiment, the first magnet 190 may be accommodated inside or outside the first side portion 141 of the housing 140 , and the second magnet 190 may be accommodated on the second side portion 142 of the housing 140 . ) may be accommodated inside or outside, or vice versa.

The shape of the second magnet 130 is a shape corresponding to the first side 141 of the housing 140 and may have a substantially rectangular parallelepiped shape, and the surface facing the first coil 120 is the first coil 120 . It may be formed to correspond to the curvature of the corresponding surface.

The second magnet 130 may be configured as a single body, and in the case of an embodiment, referring to FIG. 5A , the surface facing the first coil 120 is the S pole 132 , and the outer surface is the N pole 134 . It can be placed so that However, the present invention is not limited thereto, and the reverse configuration is also possible.

At least two or more second magnets 130 may be installed, and according to an embodiment, four may be installed. At this time, as illustrated in FIG. 5A , the second magnet 130 may have a substantially rectangular shape, or, alternatively, may have a triangular shape or a rhombus shape.

However, in the second magnet 130 , the surface facing the first coil 120 may be formed as a straight line, but the present invention is not limited thereto. The branches may be provided in a curved shape.

With this configuration, the distance to the first coil 120 can be kept constant. In the case of an embodiment, one second magnet 130-1.130-2, 130-3, and 130-4 may be installed on the four first side portions 141 of the housing 140, respectively. However, the present invention is not limited thereto, and either one of the second magnet 130 and the first coil 120 may be flat, and the other may be configured as a curved surface, depending on the design. Alternatively, all of the facing surfaces of the first coil 120 and the second magnet 130 may be curved surfaces, and in this case, the curvatures of the facing surfaces of the first coil 120 and the second magnet 130 are the same. can be

As illustrated in FIG. 5A , when the plane of the second magnet 130 is rectangular, one pair of the plurality of second magnets 130 is disposed in parallel in the second direction, and the other pair is parallel to the third direction. can be placed. According to this arrangement structure, it may be possible to control the movement of the housing 140 for hand-shake correction, which will be described later.

The first magnet 190 may be disposed in the housing 140 to overlap at least a portion of the first position sensor 170 in a second direction perpendicular to the optical axis. For example, the first magnet 190 may be accommodated and supported together with the second magnet (eg, 130 - 1 ) inside the first side 141 of the housing 140 as shown in FIG. 7 .

13A illustrates an embodiment of a disposition relationship between the first coil 120 , the first position sensor 170 , the first magnet 190a , and the second magnet 130 of FIG. 1 .

Referring to FIG. 13A , the first coil 120 may be disposed below the outer circumferential surface 110a of the bobbin 110 , and the first position sensor 170 may be spaced apart from the first coil 120 on the bobbin 110 . ) may be disposed on the upper side of the outer peripheral surface (110a).

The second magnet 130 is mounted on the housing 140 to face the first coil 120 . That is, the second magnet 130 may be disposed to overlap the optical axis or the first coil 120 in a direction perpendicular to the optical axis.

The second magnet 130 may be a single-pole magnetizing magnet having inner and outer polarities different from each other.

Referring to FIG. 13A , the second magnet 130 may be disposed such that the boundary surface between the S pole and the N pole is parallel to the direction perpendicular to the direction in which the second magnet 130 and the first coil 120 face each other. have.

The second magnet 120 may be disposed such that the surface facing the first coil 120 is the S pole 132 and the opposite surface thereof is the N pole, but the present invention is not limited thereto.

The first magnet 190a may be mounted on the housing 140 to be positioned on the second magnet 130 . The first magnet 190a may be a unipolar magnet having different upper and lower polarities. For example, the interface between the S pole and the N pole of the first magnet 190a may be perpendicular to the interface between the S pole and the N pole of the second magnet 130 , but is not limited thereto. The size of the first magnet 190a may be smaller than the size of the second magnet 130, but is not limited thereto.

The first magnet 190a may be disposed to contact the second magnet 130 . For example, the polarity (eg, N pole) of the lower side of the first magnet 190a may be opposite to the polarity (eg, S pole) of the portion of the second magnet 130 in contact with the first magnet 190a. .

In another embodiment, the first magnet 190a may be mounted on the housing 140 to be spaced apart from the second magnet 130 . A mounting groove for fixing the first magnet 190a of the housing 140 to be spaced apart from the first magnet 190a and the second magnet 130 may be provided. The first magnet 190a may overlap the second magnet 130 in a direction parallel to the optical axis.

The first position sensor 170 may overlap at least a portion of the first magnet 190a in a direction perpendicular to the optical axis. On the other hand, the first position sensor 170 may not overlap the second magnet 130 in a direction in which the first position sensor 170 and the first magnet 190a face each other. For example, the first position sensor 170 may not overlap the second magnet 130 in a direction perpendicular to the optical axis. The first position sensor 170 may detect the strength of the magnetic field of the first magnet 190a and may output a voltage having a level proportional to the strength of the sensed magnetic field.

For example, the center of the first position sensor 170 may be disposed to overlap the S pole of the first magnet 190b in a direction perpendicular to the optical axis.

13B shows another embodiment of the arrangement relationship of the first coil 120 , the first position sensor 170 , the first magnet 190b , and the second magnet 130 of FIG. 1 . The same reference numerals as in FIG. 13A denote the same components, and descriptions of the same components are simplified or omitted.

Referring to FIG. 13B , the first magnet 190b may be a positively polarized magnet having upper and lower polarities different from each other. The type of the first magnet 190b can be roughly 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. can The embodiment is not limited to the type of such a bipolar magnet.

The first magnet 190b may include a first sensing magnet 510 , a second sensing magnet 520 , and a non-magnetic barrier rib 530 .

The first sensing magnet 510 and the second sensing magnet 520 may be spaced apart from each other so as to face each other in a direction parallel to the optical axis, and the non-magnetic partition wall 530 includes the first sensing magnet 510 and the second sensing magnet ( 520) may be disposed between.

In another embodiment, the first sensing magnet and the second sensing magnet may be spaced apart to face each other in a direction perpendicular to the optical axis, and a non-magnetic barrier rib may be disposed therebetween.

The non-magnetic barrier rib 530 may include a section having little polarity as a portion having substantially no magnetism, and may be filled with air or include a non-magnetic material.

The length L3 of the non-magnetic barrier rib 530 may be less than or equal to 1/2 of the total length LT in a direction parallel to the optical axis direction of the first magnet 190b. For example, the length L3 of the non-magnetic barrier rib 530 may be 5% or more or 50% or less of the total length LT of the first magnet 190b in a direction parallel to the optical axis direction.

The length L1 of the first sensing magnet 510 facing the first position sensor 170 and the length L2 of the second sensing magnet 520 may be the same, but is not limited thereto. In another embodiment, the length L1 of the first sensing magnet 510 facing the first position sensor 170 and the length L2 of the second sensing magnet 520 may be different from each other.

The movable part of the lens driving apparatus 100 , for example, the bobbin 110 may move in the +Z-axis direction or the -Z-axis direction from an initial position. Here, the initial position is the initial position of the movable part in a state where power is not applied to the first coil 120, or the position where the movable part is placed as the upper and lower elastic members 150 and 160 are elastically deformed only by the weight of the movable part. can In the initial position, the movable part, for example, the bobbin 110 , may be spaced apart from the fixed part, for example, the housing 140 by the upper and lower elastic members 150 and 160 .

In the initial position, the center 170-1 of the first position sensor 170 may be aligned to face each other with the non-magnetic partition wall 530 of the first magnet 190b in a direction perpendicular to the optical axis, but is limited thereto. not. This is so that when the movable part moves in a direction parallel to the optical axis, the first position sensor 170 detects a section of the linearly changing magnetic field strength of the first magnet 190b.

According to the type of the first magnet 190b, the center 170 - 1 of the first position sensor 170 is any one of the first sensing magnet 510 , the second sensing magnet 520 , and the non-magnetic partition wall 530 . One and the other may be aligned to face each other in a direction perpendicular to the optical axis.

To increase the mutual electromagnetic force between the AF coil for auto-focusing and the driving magnet, the AF coil is disposed to face the driving magnet. When the AF position sensor shares a driving magnet with the AF coil, the AF position sensor may be disposed adjacent to the AF coil. Since the AF position sensor is affected by the magnetic field of the AF coil, a malfunction of the AF position sensor may occur.

14 is a graph illustrating an error of a position sensor for AF adjacent to a coil for AF. g1 represents the normal gain of the position sensor for AF, and g2 represents the gain of the position sensor for AF affected by the magnetic field of the AF coil. In this case, the position sensor for AF may be a Hall sensor.

Referring to FIG. 14 , it can be seen that the gain difference between g2 and g1 is large (950) in a high frequency region, for example, 2 [kHz] or more, and thus an error occurs in the gain of the AF position sensor.

Since the lens driving apparatus 100 according to the embodiment includes the first magnet 190 for the first position sensor 170 separately from the second magnet 130 for the first coil 120 , the first position There is no need to dispose the sensor 170 adjacent to the first coil 120, thereby preventing errors and malfunctions of the first position sensor 170 due to the influence of the magnetic field of the first coil 120 in the high-frequency region. can do.

Next, the upper elastic member 150 , the lower elastic member 160 , and the supporting member 220 will be described.

The upper elastic member 150 and the lower elastic member 160 support the bobbin 110 by elasticity. The support member 220 may support the housing 140 to be movable in a direction perpendicular to the optical axis with respect to the base 210, and may include at least one of the upper or lower elastic members 150 and 160 and the circuit board 250 . can be electrically connected.

11 is an upper elastic member 150, a lower elastic member 160, a first position sensor 170, a sensor substrate 180, a base 210, a support member 220 and a circuit board shown in FIG. 250) shows a combined perspective view.

The upper elastic member 150 may include a plurality of upper elastic members 150; 150-1, 150-2, 150-3, and 150-4 electrically separated from each other.

The elastic member contact parts 184-1, 184-2, 184-3, and 184-4 may be electrically connected to at least one of the upper elastic member 150 and the lower elastic member 160. In FIG. 11 , the upper elastic member contact portions 150; 150-1, 150-2, 150-3, and 150-4 are connected to the upper elastic members 150-1, 150-2, 150-3, and 150-4. Electrical contact is illustrated, but not limited thereto. In another embodiment, the elastic member contact portions (184-1, 184-2, 184-3, 184-4) electrically contact the lower elastic member 160 or the upper elastic member 150 and the lower elastic member 160 ) may all be in electrical contact.

Each of the elastic member contact portions 184-1, 184-2, 184-3, and 184-4 electrically connected to the first position sensor 170 is a plurality of upper elastic members 150-1, 150-2, 150 -3 and 150-4) may be electrically connected to a corresponding one. In addition, each of the plurality of upper elastic members 150 - 1 , 150 - 2 , 150 - 3 , and 150 - 4 may be electrically connected to a corresponding one of the plurality of support members 220 .

Each of the first and third upper elastic members 150-1 and 150-3 150a includes a first inner frame 151, a 1-1 outer frame 152a, and a first frame connection part 153, and , Each of the second and fourth upper elastic members 150-2 and 150-4 150b includes a first inner frame 151, a 1-1 outer frame 152b, and a first frame connection part 153 can do. The first inner frame 151 may be coupled to the bobbin 110 and the corresponding elastic member contact portions 184-1, 184-2, 184-3, and 184-4.

As shown in FIG. 4 , when the upper surface 112a of the second protrusion 112 is flat, the first inner frame 151 may be mounted on the upper surface 112a and then fixed by an adhesive member. According to another embodiment, when a support protrusion (not shown) is formed on the upper surface 112a unlike that shown in FIG. 4 , the support protrusion is formed in the 2-1 through hole 151a formed in the first inner frame 151 . After the is inserted, it may be fixed by thermal fusion, or may be fixed with an adhesive member such as epoxy.

The 1-1 outer frames 152a and 152b may be coupled to the housing 140 and connected to the support member 220 , and the first frame connection part 153 may be connected to the first inner frame 151 and the 1-1 outer frame. Frames 152a and 152b may be connected. The 1-1 outer frame 152b has a shape in which the 1-1 outer frame 152a is divided, but the embodiment is not limited thereto. That is, according to another embodiment, the 1-1 outer frame 152a may be divided into the same shape as the 1-1 outer frame 152b.

The first frame connection part 153 may be bent at least once to form a pattern having a predetermined shape. The bobbin 110 may be elastically supported by upward and/or descending motions in the first direction parallel to the optical axis through a change in the position of the first frame connection part 153 and micro-deformation.

The first upper support protrusion 143 of the housing 140 may couple and fix the 1-1 outer frames 152a and 152b of the upper elastic member 150 illustrated in FIG. 11 and the housing 140 . According to an embodiment, a 2-2 through hole 157 having a shape corresponding to a position corresponding to the first upper support protrusion 143 may be formed in the 1-1 outer frames 152a and 152b. At this time, the first upper support protrusion 143 and the second through hole 157 may be fixed by thermal fusion, or may be fixed with an adhesive member such as epoxy. In order to fix the plurality of first to fourth upper elastic members 150-1, 150-2, 150-3, and 150-4, a sufficient number of first upper support protrusions 143 may be provided. Accordingly, incomplete coupling between the first to fourth upper elastic members 150 - 1 , 150 - 2 , 150 - 3 and 150 - 4 and the housing 140 can be prevented.

In addition, a distance between the plurality of first upper support protrusions 143 may be appropriately arranged within a range capable of avoiding interference with neighboring components. That is, each of the first upper support protrusions 143 may be disposed on the edge of the housing 140 at regular intervals symmetrically with respect to the center of the bobbin 110 , and their spacing is not constant, but the bobbin 110 . ) may be arranged to be symmetrical with respect to a specific virtual line passing through the center.

After the first inner frame 151 is coupled to the bobbin 110 and the 1-1 outer frames 152a and 152b are coupled to the housing 140 , the elastic member contact portion 184 - 1 of the sensor substrate 180 . , 184-2, 184-3, 184-4) and conductive connections (CP11, CP12, CP13, CP14) such as soldering to the first inner frame 151 as shown in FIG. Power of different polarity is applied to two pins (P11, P12) of the four pins (P11, P12, P21, P22) of the sensor 170, and the remaining two of the four pins of the first position sensor 170 It is possible to send a feedback signal from the pins P21 and P22. In this way, the upper elastic member 150 includes the first to fourth upper elastic members 150-1, 150-2, 150-3; 150-4) can be divided into four.

The first to fourth upper elastic members 150 - 1 , 150 - 2 , 150 - 3 and 150 - 4 are connected to the circuit board 250 through the support member 220 . That is, the first upper elastic member 150-1 is connected to the circuit board 250 through at least one of the 1-1 and 1-2 support members 220-1a and 220-1b, and the second upper elastic member 150-1 is connected to the second upper side elastic member 150-1. The elastic member 150-2 is connected to the circuit board 250 through the second support member 220-2, and the third upper elastic member 150-3 is a 3-1 or 3-2 support member. It is connected to the circuit board 250 through at least one of 220-3a and 220-3b, and the fourth upper elastic member 150-4 is connected to the circuit board 250 through the fourth support member 220-4. can be connected to Accordingly, the first position sensor 170 receives power provided from the circuit board 250 through the support member 220 and the upper elastic member 150 or provides a feedback signal outputted therefrom to the circuit board 250 . You may.

Meanwhile, the lower elastic member 160 may include first and second lower elastic members 160 - 1 and 160 - 2 electrically separated from each other. The first coil 120 may be connected to the plurality of support members 220 through the first and second lower elastic members 160 - 1 and 160 - 2 .

Each of the first and second lower elastic members 160-1 and 160-2 includes at least one second inner frame 161-1, 161-2, and at least one second outer frame 162-1, 162- 2) and at least one second frame connection part 163-1, 163-2.

The second inner frames 161-1 and 161-2 may be coupled to the bobbin 110 , and the second outer frames 162-2 and 162-2 may be coupled to the housing 140 . The 2-1 frame connection part 163-1 connects the second inner frame 161-1 and the second outer frame 162-1, and the 2-2 frame connection part 163-2 includes two second frames. The two outer frames 162-1 and 162-2 may be connected, and the 2-3th frame connection part 163-3 may connect the second inner frame 161-2 and the second outer frame 162-2 to each other. can

In addition, the first lower elastic member 160-1 further includes a first coil frame 164-1, and the second lower elastic member 160-2 further includes a second coil frame 164-2. can do. Referring to FIG. 11 , the first and second coil frames 164-1 and 164-2 are disposed on the upper surface of the first coil 120 at a position close to the pair of winding protrusions 119 on which both ends of the first coil 120 are wound. The end of the first coil 120 is connected to be energized by a conductive connection member such as solder, and the first and second lower elastic members 160-1 and 160-2 are applied with power having different polarities to the first coil 120. It can be transmitted to one coil 120 . In this way, the lower elastic member 160 is divided into first and second lower elastic members 160-1 and 160-2 so that power of different polarities can be applied and transmitted to the first coil 120. can be

In addition, each of the first and second lower elastic members 160 - 1 and 160 - 2 may further include a 2-4 th frame connection part 163 - 4 . The 2-4th frame connection part 163-4 may connect the coil frame 164 and the second inner frame 161-2.

At least one of the 2-1 to 2-4 frame connection parts 163-1, 163-2, 163-3, and 163-4 described above may be bent at least once to form a pattern having a predetermined shape. . In particular, the bobbin 110 moves up and/or lowers in the first direction parallel to the optical axis through position change and micro-deformation of the 2-1 and 2-3 frame connection parts 163-1 and 163-3. This can be elastically supported.

According to an embodiment, as illustrated, each of the first and second lower elastic members 160 - 1 and 160 - 2 may further include a bent portion 165 . The bent part 165 is bent in the first direction from the 2-2nd frame connection part 163-2 toward the upper elastic member 150 . The upper elastic member 160 may further include fifth and sixth upper elastic members 150 - 5 and 150 - 6 electrically separated from each other. Each of the fifth and sixth upper elastic members 150 - 5 and 150 - 6 may include a connection frame 154 and a 1-2 first outer frame 155 . The connection frame 154 is connected to the bent part 165 and may be formed to extend in the first direction. The 1-2 outer frame 155 may be bent from the connection frame 154 in a direction perpendicular to the first direction to be coupled to the housing 155 , and may be connected to the support member 220 . That is, the fifth upper elastic member 150 - 5 may be connected to the fifth support member 220 - 5 , and the sixth upper elastic member 150 - 6 may be connected to the sixth support member 220 - 6 . . At this time, the first and second lower elastic members (160-1, 160-2), respectively, the bent portion 165 and the fifth and sixth upper elastic members (150-5, 150-6) of the connecting frame (154) and the 1-2 first outer frame 155 may be integrally formed. In this way, each of the first and second lower elastic members 160-1 and 160-2 and the fifth and sixth upper elastic members 150-5 and 150-6, respectively, are bent portions 165 in the first direction. , 154).

According to another embodiment, the connecting frame 154 of each of the fifth and sixth upper elastic members 150 - 5 and 150 - 6 is connected to the first from the first - second outer frame 155 , as shown in FIG. 12 . It may be formed by bending in the first direction up to the 2-2 frame connection part 163-2 in the direction. In this case, the bent portion 165 in each of the first and second lower elastic members 160-1 and 160-2 shown in FIG. 12 may be omitted. As such, each of the first and second lower elastic members 160-1 and 160-2 does not have a portion bent in the first direction, and the fifth and sixth upper elastic members 150-5 and 150-6, respectively, respectively. may have a portion 154 bent in the first direction.

According to another embodiment, the bent portion 165 of each of the first and second lower elastic members 160 - 1 and 160 - 2 is different from that shown in FIG. 12 , the second frame connecting portion 163 - 2 . The first and second outer frames 155 may be bent in the first direction. In this case, the connection frame 154 of each of the fifth and sixth upper elastic members 150-5 and 150-6 shown in FIG. 12 may be omitted. As such, each of the first and second lower elastic members 160 - 1 and 160 - 2 has a portion 165 bent in the first direction, while the fifth and sixth upper elastic members 150 - 5 and 150 . -6) Each may not have a bent portion in the first direction.

According to another embodiment, unlike shown in FIG. 11 , a metal piece (not shown) to be inserted or attached to the housing 140 may be further provided. In this case, the 1-2th outer frame 155 and the 2-2nd frame connection part 163-2 may be connected to each other by a metal piece. In this case, the bent portion 165 and the connecting frame 154 shown in FIG. 11 may be omitted. As such, each of the first and second lower elastic members 160-1 and 160-2 and the fifth and sixth upper elastic members 150-5 and 150-6, respectively, do not have portions bent in the first direction. it may not be

As described above, at least one of the upper elastic member and the lower elastic member may have a shape bent in the first direction, and neither of the upper elastic member and the lower elastic member may have a shape bent in the first direction. .

Meanwhile, the 1-2 th outer frame 155 may further include a 2-2 th through hole 157 like the 1-1 outer frame 152b.

According to one embodiment, the first to sixth upper elastic members (150-1, 150-2, 150-3, 150-4, 150-5, 150-6) of the 1-1 outer frames (152a, 152b) ) may be disposed to face each other in a diagonal direction, and the first and second outer frames 155 may be disposed to face each other in a diagonal direction. That is, the 1-1 outer frame 152a of the first upper elastic member 150-1 and the 1-1 outer frame 152a of the third upper elastic member 150-3 face each other in a diagonal direction while facing each other. can be placed. In addition, the 1-1 outer frame 152b of the second upper elastic member 150-2 and the 1-1 outer frame 152b of the fourth upper elastic member 150-4 are opposite to each other in a diagonal direction. can be placed. In addition, the 1-2 outer frame 155 of the fifth upper elastic member 150-5 and the 1-2 outer frame 155 of the sixth upper elastic member 150-6 face each other in a diagonal direction. can be placed.

Alternatively, according to another embodiment, although not shown, the first to sixth upper elastic members 150-1, 150-2, 150-3, 150-4, 150-5, 150-6 of the first- The first outer frames 152a and 152b may be disposed at any two corners among the four corners shown in FIG. 11 instead of being disposed to face each other in a diagonal direction, and the first and second outer frames 155 may be arranged diagonally to each other. Instead of being arranged facing each other in the direction, it may be arranged at the other two corners of the four corners.

On the other hand, the first and second lower elastic members 160 - 1 and 160 - 2 are circuit boards through fifth and sixth upper elastic members 150 - 5 and 150 - 6 connected to the plurality of support members 220 . It can be seen that power is received from 250 and provided to the first coil 120 . That is, the first lower elastic member 160 - 1 is connected to the circuit board 250 through the sixth upper elastic member 160 - 6 and the sixth supporting member 220 , and the second lower elastic member 160 - 2) may be connected to the circuit board 250 through the fifth upper elastic member 160 - 5 and the fifth support member 220 - 5 .

In an embodiment, each of the upper and lower elastic members 150 and 160 is divided, but in another embodiment, the upper and lower elastic members 150 and 160 may not be divided.

The first lower support protrusion 117 of the bobbin 110 may couple and fix the second inner frames 161-1 and 161-2 of the lower elastic member 160 and the bobbin 110 . The second lower support protrusion 145 of the housing 140 may couple and fix the second outer frames 162-1 and 162-2 of the lower elastic member 160 and the housing 140 .

In this case, the number of the second lower support protrusions 145 may be greater than the number of the first lower support protrusions 117 . This is because the length of the second frame connection part 163 - 2 of the lower elastic member 160 is longer than the length of the first frame connection part 163 - 1 .

As described above, since the lower elastic member 160 has a structure divided into two, the number of the first and second lower support protrusions 117 and 145 is sufficient as the number of the first upper support protrusions 143 . By forming a large amount, it is possible to prevent a lifting phenomenon that may occur when the lower elastic member 160 is separated.

Referring to FIG. 11 , according to the embodiment, the first lower support protrusion ( 161-1, 161-2) of the first and second lower elastic members (160-1, 160-1), respectively, in the second inner frames (161-1, 161-2) The third through hole 161a may be formed in a shape corresponding to the position corresponding to the 117 . In this case, the first lower support protrusion 117 and the third through hole 161a may be fixed by thermal fusion, or may be fixed with an adhesive member such as epoxy.

In addition, in the first and second lower elastic members 160-1 and 160-2, respectively, in the second outer frames 162-1 and 162-2, the fourth lower support protrusion 145 and the second lower support protrusion 145 are located. A through hole 162a may be formed. In this case, the second lower support protrusion 145 and the fourth through hole 162a may be fixed by thermal fusion or an adhesive member such as epoxy.

Each of the above-described upper elastic member 150 and lower elastic member 160 may be provided as a leaf spring, but the embodiment is not limited to the material of the upper and lower elastic members 150 and 160 .

Power is supplied to the first position sensor 170 using the two electrically separated upper elastic members 150 , and the feedback signal output from the first position sensor 170 is electrically separated from the other two upper elastic members 150 . Power can be supplied to the first coil 120 by using the member 150 to transfer the power to the circuit board 250 , and using the two electrically separated lower elastic members 160 . However, the embodiment is not limited thereto.

That is, according to another embodiment, the roles of the plurality of upper elastic members 150 and the roles of the plurality of lower elastic members 160 may be interchanged. That is, power is supplied to the first coil 120 using two electrically separated upper elastic members 150 , and the first position sensor 170 using two electrically separated lower elastic members 160 . ), the feedback signal output from the first position sensor 170 may be transmitted to the circuit board 250 using the other two electrically separated lower elastic members 160 . Although not shown, this is apparent from the foregoing drawings.

Hereinafter, when the roles of the above-described upper elastic member 150 and the lower elastic member 160 are changed, the upper and lower elastic members 150 and 160 will be briefly described as follows. In this case, the lower elastic member is divided in the same shape as the upper elastic member 150 shown in FIG. 10, and the upper elastic member is divided in the same shape as the lower elastic member 160 shown in FIG. 11, and the sensor substrate ( 180 is coupled to the bobbin 110 , and the elastic member contact portion of the sensor substrate 180 protrudes in a direction facing the lower elastic member 160 rather than in a direction facing the upper elastic member 150 , and the corresponding lower side It may be coupled to the elastic member 160 .

The lower elastic member may include at least four first to fourth lower elastic members separated from each other, and the first position sensor 170 may be connected to the plurality of support members 220 through the first to fourth lower elastic members. have.

Each of the first to fourth lower elastic members includes a first inner frame coupled to the bobbin 110 , a 1-1 outer frame coupled to the housing 140 and connected to the support member 220 , and a first inner frame and a first frame connection part connecting the 1-1 outer frame.

The upper elastic member may include at least two first and second upper elastic members separated from each other, and the first coil 120 may be connected to the plurality of support members 220 through the first and second upper elastic members. .

Each of the first and second upper elastic members includes at least one second inner frame coupled to the bobbin 110 , at least one second outer frame coupled to the housing 140 , and at least one second inner frame and a 2-1 frame connecting portion connecting the at least one second outer frame.

The at least one second outer frame may include a plurality of second outer frames, and each of the first and second upper elastic members may further include a 2-2 second frame connecting portion connecting the plurality of second outer frames.

The at least four lower elastic members further include fifth and sixth lower elastic members separated from each other, each of the fifth and sixth lower elastic members being formed in a direction orthogonal to the first direction and coupled to the housing 140 , , it may include a 1-2 first outer frame connected to the support member 220 .

Each of the first and second upper elastic members may further include a bent portion bent in the first direction from the second-second frame connecting portion toward the lower elastic member. Each of the fifth and sixth lower elastic members may further include a connecting frame connecting the bent portion and the first-second outer frame.

Alternatively, each of the fifth and sixth lower elastic members may further include a connection frame bent in the first direction from the first-second outer frame to the second-second frame connection part. In this case, the bent part, the connection frame, and the 1-2 outer frame may be integrally formed.

Alternatively, each of the first and second upper elastic members may further include a bent portion bent in the first direction from the second-second frame connection portion to the first-second outer frame.

Alternatively, the lens driving device may further include a metal piece inserted or attached to the housing 140 , and the 1-2-th outer frame and the 2-3-th frame connecting portion may be connected by the metal piece.

Each of the first and second upper elastic members includes a coil frame connected to a corresponding one of both ends of the first coil 120, and a 2-3 frame connecting portion connecting the coil frame and at least one second inner frame. may include more.

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

The base 210 may have a hollow corresponding to the hollow of the bobbin 110 and/or the hollow of the housing 140 , and may have a shape matching or corresponding to the cover member 300 , for example, a rectangular shape. can

12 is an exploded perspective view of the base 210 , the second coil 230 , and the circuit board 250 shown in FIG. 1 .

The base 210 may include a step 211 to which an adhesive may be applied when the cover member 300 is adhesively fixed. At this time, the step 211 may guide the cover member 300 coupled to the upper side, and may be coupled such that the end of the cover member 300 is in surface contact.

The step 211 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 be disposed to be spaced apart from the first lens driving unit by a predetermined interval. A support portion 255 having a corresponding size may be formed on a surface of the base 210 facing the portion where the terminal 251 is formed of the circuit board 250 . The support part 255 is formed without a step 211 in a predetermined cross-section from the outer surface of the base 210 , so that the terminal surface 253 on which the terminal 251 is formed can be supported.

The edge of the base 210 has a second recess 212 . When the edge of the cover member 300 has a protruding shape, the protrusion of the cover member 300 may be coupled to the base 210 in the second recess 212 .

In addition, second seating grooves 215 - 1 and 215 - 2 in which the second position sensor 240 can be disposed may be provided on the upper surface of the base 210 . According to the embodiment, a total of two second seating grooves 215-1 and 215-2 are provided, and the second position sensor 240 is disposed in the second seating grooves 215-1 and 215-2, respectively. The extent to which the housing 140 moves in the second direction and the third direction may be detected. To this end, the angle formed by the imaginary lines connecting the second seating grooves 215-1 and 215-2 and the center of the base 210 is 90°, so that the two second seating grooves 215-1 and 215-2 ) can be placed.

A tapered inclined surface (not shown) may be formed on at least one surface of the second seating grooves 215-1 and 215-2. Epoxy injection for assembling the second position sensor 240 may be configured to be performed more smoothly. In addition, a separate epoxy may not be injected into the second seating grooves 215-1 and 215-2, but the second position sensor 240 may be fixed by injecting epoxy or the like. The second seating grooves 215 - 1 and 215 - 2 may be disposed at or near the center of the second coil 230 . Alternatively, the center of the second coil 230 may coincide with the center of the second position sensor 240 . According to an embodiment, the second seating grooves 215 - 1 and 215 - 2 may be installed on the side of the base 210 .

A groove portion is formed in the base 210 at a position corresponding to the step of the cover member 300 , and an adhesive or the like may be injected through the groove portion.

In addition, a seating portion (not shown) in which a filter is installed may be formed on a lower surface of the base 210 . Such a filter may be an infrared cut filter. However, the present invention is not limited thereto, and a filter may be disposed in a separate sensor holder under the base 210 . In addition, as will be described later, a circuit board on which an image sensor is mounted may be disposed on the lower surface of the base 210 , and the camera module may include the lens driving device 100 and the circuit board on which the image sensor is mounted according to an embodiment. have.

Meanwhile, the plurality of support members 220 may be respectively disposed on the second side portions 142 of the housing 140 . For example, two support members 220 may be disposed on each of the four second side portions 142 .

Alternatively, in the housing 140 , only one support member 220 is disposed on each of the two second side portions 142 of the four second side portions 142 , and two support members 220 are disposed on each of the remaining two second side portions 142 . A support member 220 may be disposed.

Also, in another embodiment, the support member 220 may be disposed on the first side portion 141 of the housing 140 in the form of a leaf spring.

The support member 220 forms a path for transmitting power required from the first position sensor 170 and the first coil 120 as described above, and outputs a feedback signal output from the first position sensor 170 as a circuit. A path provided to the substrate 250 may be formed.

The support member 220 may be implemented as a member that can be supported by elasticity, for example, a leaf spring, a coil spring, a suspension wire, or the like. Also, in another embodiment, the support member 220 may be integrally formed with the upper elastic member.

The second coil 230 may be disposed on the upper part of the circuit board 250 and the second position sensor 240 may be disposed on the lower part of the circuit board 250 . The second position sensor 240 may detect the displacement of the housing 140 with respect to the base 210 in a direction perpendicular to the optical axis. The second position sensor 240 may include two sensors 240a 240b disposed to be orthogonal to each other in order to detect the displacement of the housing 140 in a direction perpendicular to the optical axis (X-axis and Y-axis direction). have.

The second position sensor 240 , the second coil 230 , and the first magnet 130 may be disposed on the same axis, but is not limited thereto.

The circuit board 250 is disposed on the upper surface of the base 210 , and may have a hollow of the bobbin 110 , a hollow of the housing 140 , or/and a hollow corresponding to the hollow of the base 210 . . The shape of the outer peripheral surface of the circuit board 250 may match or correspond to the upper surface of the base 210 , for example, a rectangular shape.

The circuit board 250 may include at least one second terminal surface 253 that is bent from the upper surface and on which a plurality of terminals receiving electrical signals from the outside or pins are formed. .

The second coil 230 may include a fifth through hole 230a passing through a corner portion of the circuit member 231 . The support member 220 may be connected to the circuit board 250 through the fifth through hole 230a.

The second coil 230 is disposed on the circuit board 250 to face the second magnet 130 fixed to the housing 140 .

In FIG. 12 , the circuit member 231 including the second coil 230 may be disposed on the upper surface of the circuit board 250 . However, the present invention is not limited thereto, and in another embodiment, a circuit pattern may be formed in the shape of the second coil 230 on the circuit board 250 .

A total of four second coils 230 may be installed on four sides of the circuit board 250 , but the present invention is not limited thereto. It is possible, and four or more may be installed.

Alternatively, the second coil 230 may be configured by winding a wire in a donut shape, or the second coil 230 may be formed in an FP coil shape and electrically connected to the circuit board 250 .

As described above, the housing 140 may move in the second and/or third directions by the interaction between the second magnet 130 and the second coil 230 disposed to face each other, so that handshake correction may be performed.

The second position sensor 240 may detect a displacement of the first lens driving unit with respect to the base 210 in the X-axis and Y-axis directions orthogonal to the optical axis (Z-axis). To this end, the second position sensor 240 may be disposed on the center side of the second coil 230 with the circuit board 250 interposed therebetween to detect the movement of the housing 140 .

The second position sensor 240 may be provided as a Hall sensor, and any sensor capable of detecting the magnetic field strength may be used. As shown in FIG. 12 , a total of two second position sensors 240 may be installed on the sides of the base 210 disposed on the lower side of the circuit board 250 , and the second position sensors 240 are The second seating grooves 215-1 and 215-2 formed in the base 210 may be inserted and disposed.

The circuit board 250 may include sixth through holes 250a1 and 250a2 through which the support member 220 can pass. The support member 220 may be electrically connected to a corresponding circuit pattern that may be disposed on the bottom surface of the circuit board 250 through the sixth through holes 250a1 and 250a2 of the circuit board 250 through soldering or the like.

The circuit board 250 may further include a seventh through hole 250b. The second upper support protrusion 217 and the seventh through hole 250b of the base 210 may be coupled as shown in FIG. 11 and fixed by thermal fusion, or may be fixed with an adhesive member such as epoxy.

The circuit board 250 may further include a plurality of terminals 251 . A bent terminal surface 253 may be formed on the circuit board 250 . According to an embodiment, at least one terminal 251 may be installed on one bent terminal surface 253 of the circuit board 250 .

According to the embodiment, the first and second coils 120 and 230 and the first and second sensors 170 and 240 by receiving external power through a plurality of terminals 251 installed on the terminal surface 253 are applied. may be supplied, or a feedback signal output from the first position sensor 170 may be output to the outside. The number of terminals formed on the terminal surface 253 on which the terminals 251 are installed may be increased or decreased according to the types of components that need to be controlled.

According to an embodiment, the circuit board 250 may be provided as an FPCB, but is not limited thereto, and the terminal configuration of the circuit board 250 is directly formed on the surface of the base 210 using a surface electrode method, etc. It is also possible

As described above, the circuit board 250 supplies power (or current) required from the first coil 120 and the first position sensor 170 , and receives a feedback signal from the first position sensor 170 . The displacement of the indented bobbin 110 may be adjusted.

Meanwhile, the lens driving apparatus according to the above-described embodiment may be used in various fields, for example, a camera module. For example, the camera module may be applied to a mobile device such as a mobile phone.

The camera module according to the embodiment may include a lens barrel coupled to the bobbin 110 , an image sensor (not shown), a board for an image sensor connected to the circuit board 250 and provided with an image sensor, and an optical system.

In addition, the optical system may include at least one lens that transmits an image to the image sensor. In this case, an actuator module capable of performing an auto-focusing function and a hand-shake correction function may be installed in the optical system. The actuator module performing the auto-focusing function may be configured in various ways, and a voice coil unit motor is generally used. The lens driving apparatus according to the above-described embodiment may serve as an actuator module that performs both an auto-focusing function and a hand-shake correction function.

In addition, the camera module may further include an infrared cut filter (not shown). The infrared cut filter serves to block light in the infrared region from being incident on the image sensor. In this case, in the base 210 illustrated in FIG. 2 , an infrared cut filter may be installed at a position corresponding to the image sensor, and may be coupled to a holder member (not shown). In addition, the base 210 may support the lower side of the holder member.

A separate terminal member may be installed on the base 210 to conduct electricity with the circuit board 250 , 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.

15 shows the arrangement according to another embodiment of the first position sensor 170 and the first magnet 190 shown in FIG. 1, and FIG. 16 is for mounting the first magnet 190 shown in FIG. The seating groove 148a of the housing 140 is shown, and FIG. 17 is a cross-sectional view taken along line II' of FIG. 3 for the embodiment shown in FIGS. 15 and 16 .

The embodiment shown in FIGS. 15 and 16 is described in FIGS. 1 to 12 except for the arrangement of the first position sensor 170 and the first magnet 190 and the seating groove 148a of the housing 140 . structure may be the same.

15 to 17 , the first position sensor 170 may be disposed on any one of the second side surfaces S2 of the bobbin 110 . For example, the receiving groove 116 of the bobbin 110 may be provided on any one of the second side surfaces S2 of the bobbin 110 , and the first position sensor 170 is the receiving groove ( 116).

The first magnet 190 may be disposed in an area between two adjacent second magnets (eg, 130 - 1 and 130 - 2 ) to face the first position sensor 170 .

For example, the first magnet 190 may be disposed, fixed, or mounted on any one of the second side portions 142 of the housing 140 . Also, the first position sensor 170 may be disposed on any one of the second sides of the bobbin 110 corresponding to the second side of the housing 140 on which the first magnet 190 is disposed.

For example, the housing 140 may be provided with a first magnet seating groove 148a in any one of the second side portions 142, and the first magnet 190 is disposed in the first magnet seating groove 148a, It can be fixed or mounted.

For example, the first magnet seating groove 148a may be provided on a surface of the third protrusion 148 of the housing 140 facing the bobbin 110 .

The first position sensor 170 may not overlap the second magnet 130 in a direction in which the first position sensor 170 and the first magnet 190a face each other. For example, the first position sensor 170 may not overlap the second magnet 130 in a direction perpendicular to the optical axis.

The first magnet 190 of the lens driving device 100 shown in FIGS. 1 to 12 may be aligned or overlapped with the second magnet 130 in a direction parallel to the optical axis, but shown in FIGS. 15 and 16 . The first magnet 190 and the second magnet 130 of the embodiment are not aligned with each other in a direction parallel to the optical axis or do not overlap.

15 and 16, the first magnet 190 and the second magnet 130 are not aligned or overlapped with each other in a direction parallel to the optical axis, so that the first position sensor 170 is 2 The effect of the magnet 130 on the change in the magnetic field may be reduced as compared with the embodiments illustrated in FIGS. 1 and 12 , and thus more accurate autofocus sensing may be possible.

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: second magnet 140: housing
150: upper elastic member 160: lower elastic member
170: first position sensor 180: sensor board
190: first magnet 210: base
220: support member 230: second coil
240: second position sensor 250: circuit board.
300: no cover.

Claims (20)

a housing comprising four sides and four corners;
a bobbin disposed within the housing;
a first coil disposed on the bobbin;
a first magnet disposed at any one of the four corners of the housing;
a first position sensor disposed on the bobbin to face the first magnet;
a second magnet disposed on each of the four sides of the housing to face the first coil and moving the bobbin in a direction parallel to the optical axis by electromagnetic interaction with the first coil;
an upper elastic member coupled to an upper portion of the bobbin and an upper portion of the housing;
a circuit board including a second coil facing the second magnet; and
a support member electrically connecting the upper elastic member and the circuit board;
The housing includes a seating groove formed on an inner surface of any one of the four corners, the first magnet is disposed in the seating groove, and the first magnet is disposed below an upper surface of the housing lens drive. According to claim 1,
At least a portion of the housing covers an upper surface of the first magnet. According to claim 1,
The first position sensor overlaps at least a portion of the first magnet in a direction perpendicular to the optical axis. According to claim 1,
The first coil is disposed below the outer circumferential surface of the bobbin, and the first position sensor is disposed above the outer circumferential surface of the bobbin. According to claim 1,
The first magnet is disposed between two adjacent magnets among the second magnets disposed on the four sides of the housing,
The first magnet does not overlap the second magnet in a direction parallel to the optical axis. According to claim 1,
The upper elastic member includes a first upper elastic member, a second upper elastic member, a third upper elastic member, and a fourth upper elastic member spaced apart from each other,
The support member may include a first support member connected to the first upper elastic member, a second support member connected to the second upper elastic member, a third support member connected to the third upper elastic member, and the fourth A lens driving device including a fourth support member connected to the upper elastic member. 7. The method of claim 6,
and four contact portions electrically connected to the first position sensor and disposed on the bobbin,
The four contact portions are connected to a corresponding one of the first to fourth upper elastic members. According to claim 1,
The circuit board includes at least one terminal surface bent from an upper surface and a plurality of terminals formed on the terminal surface. 9. The method of claim 8,
a base disposed under the circuit board; and
and a second position sensor configured to detect a displacement of the housing with respect to the base in a direction perpendicular to the optical axis. According to claim 1,
The housing includes a support protrusion formed on the upper surface of the housing, and the upper elastic member includes an outer frame coupled to the support protrusion, an inner frame coupled to the bobbin, and a connection portion connecting the outer frame and the inner frame. including,
The first magnet is a lens driving device positioned below the support protrusion. a housing comprising four sides and four corners;
a bobbin disposed within the housing;
a first coil disposed on an outer circumferential surface of the bobbin;
four contact portions disposed on the bobbin;
a first position sensor disposed on the bobbin and electrically connected to the four contact parts;
a first magnet disposed at any one of the four corners and facing the first position sensor;
a second magnet disposed on each of the four sides of the housing to face the first coil and moving the bobbin in a direction parallel to the optical axis by electromagnetic interaction with the first coil;
an upper elastic member coupled to an upper portion of the bobbin and an upper portion of the housing and electrically connected to the four contact portions;
a circuit board including a second coil facing the second magnet; and
a support member electrically connecting the upper elastic member and the circuit board;
At least a portion of the housing covers an upper surface of the first magnet. 12. The method of claim 11,
The upper elastic member includes four upper elastic members corresponding to the four contact parts, each of the four upper elastic members is electrically connected to a corresponding one of the four contact parts,
The support member includes four support members corresponding to the four upper elastic members, each of the four support members disposed at a corresponding one of the four corners of the housing, A lens driving device coupled to a corresponding one of the upper elastic members. 12. The method of claim 11,
The upper elastic member may include an inner frame coupled to the upper portion of the bobbin, an outer frame coupled to the upper portion of the housing, and a connector connecting the inner frame and the outer frame. 14. The method of claim 13,
The first magnet is a lens driving device disposed below the outer frame. 12. The method of claim 11,
The first coil is disposed below the outer circumferential surface of the bobbin, and the first position sensor is disposed above the outer circumferential surface of the bobbin. 12. The method of claim 11,
At least a portion of the first magnet overlaps the first position sensor in a direction perpendicular to the optical axis, and the first magnet does not overlap the second magnet in a direction parallel to the optical axis. 12. The method of claim 11,
The circuit board includes at least one terminal surface bent from an upper surface and a plurality of terminals formed on the terminal surface. 12. The method of claim 11,
a base disposed under the circuit board; and
A second position sensor for detecting a displacement of the housing with respect to the base in a direction perpendicular to the optical axis,
and the second coil includes four coils corresponding to four second magnets disposed on the four sides of the housing in a direction parallel to the optical axis. 19. The method of claim 18,
The second position sensor includes two sensors,
The base is a lens driving device including a seating groove for arranging each of the two sensors. 20. The method according to any one of claims 1 to 19,
The first position sensor is a hall sensor.

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