KR102513408B1 - A lens moving unit, and camera module and optical instrument including the same - Google Patents

Abstract

The embodiment includes a housing supporting a magnet, a bobbin having a first coil disposed on an outer circumferential surface and moving by interaction between the magnet and the first coil, an elastic member coupled to the bobbin and the housing, and applying a first driving signal. A second coil for moving the housing by interaction with the magnet, a position sensor for sensing the strength of the magnetic field of the magnet according to the movement of the housing, and a second driving signal are applied to the position sensor A third coil disposed correspondingly, wherein a first magnetic field of the second coil generated by the first drive signal and a second magnetic field of the third coil generated by the second drive signal cancel each other out. occurs in the direction

Description

Lens driving device, and camera module and optical device including the same

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

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

BACKGROUND OF THE INVENTION Demand and production of electronic products such as smartphones and camera-equipped mobile phones are increasing. Cameras for mobile phones tend to be high-resolution and miniaturized, and accordingly, actuators are becoming miniaturized, large-diameter, and multi-functional. In order to implement a camera for a high-pixel mobile phone, additional functions such as performance improvement, auto focusing, shutter shake improvement, and zoom function of the mobile phone camera are required.

Embodiments provide a lens driving device capable of reducing the influence of an induced magnetic field of an OIS coil on an OIS position sensor and ensuring stability of OIS feedback control and reliability of image stabilization, and a camera module and optical device including the same.

A lens driving device according to an embodiment includes a housing supporting a magnet; a bobbin having a first coil disposed on an outer circumferential surface and moving by interaction between the magnet and the first coil; an elastic member coupled to the bobbin and the housing; a second coil to which a first driving signal is applied and which moves the housing by interaction with the magnet; a position sensor for sensing the strength of the magnetic field of the magnet according to the movement of the housing; and a third coil to which a second driving signal is applied and disposed corresponding to the position sensor, wherein the first magnetic field of the second coil generated by the first driving signal and the second driving signal generate The second magnetic fields of the third coil are generated in directions that cancel each other.

The lens driving device may further include a circuit board disposed under the housing and providing the first and second driving signals, and the third coil may be patterned on the circuit board.

The second coil may be disposed on the circuit board, and the position sensor may be disposed below the circuit board.

Each of the second coil and the third coil may have a ring shape wound to rotate clockwise or counterclockwise with respect to an optical axis, and the number of winding rotations of the third coil may be less than the number of rotations of the second coil. .

The number of rotations of the third coil may be one.

At least a portion of the third coil may overlap the position sensor in a first direction that is an optical axis direction.

Each of the first and second driving signals is a current, and a current direction of the first driving signal and a current direction of the second driving signal may be opposite to each other.

An intensity of the second magnetic field may be less than an intensity of the third magnetic field.

The third coil may include a first wiring having one end connected to any one terminal of the circuit board; a second wire having one end connected to any other terminal of the circuit board; and a ring portion connected between the other end of the first wire and the other end of the second wire and having a ring shape.

A portion where the other end of the first wire and one end of the ring part are connected and a portion where the other end of the second wire and the other end of the ring part are connected may be separated by a predetermined distance.

The third coil may include a first region overlapping the second coil in a first direction that is an optical axis direction; and a second region that does not overlap with the second coil in a first direction that is an optical axis direction.

The first area may overlap at least a portion of the position sensor in the first direction.

A diameter of the third coil in the second direction is equal to or smaller than a diameter of the position sensor in the second direction, and the second direction is perpendicular to the first direction and is perpendicular to the longitudinal direction of the second coil. can be parallel

The length of the second region of the third coil in the third direction is longer than the length of the first region of the third coil in the third direction, the third direction is perpendicular to the first direction, and It may be perpendicular to the longitudinal direction of the coil.

A diameter of the ring part in the second direction may be smaller than a diameter of the second coil in the second direction.

A center of the position sensor may be aligned with a center line of the ring part in the first direction, and the center line may be an imaginary straight line that passes through the center of the ring part and is perpendicular to the first direction.

A lens driving device according to another embodiment includes a housing supporting a magnet; a bobbin having a first coil disposed on an outer circumferential surface and moving by interaction between the magnet and the first coil; an elastic member coupled to the bobbin and the housing; a second coil moving the housing by interaction with the magnet; a position sensor for sensing the strength of the magnetic field of the magnet according to the movement of the housing; and a third coil disposed corresponding to the position sensor, wherein the third coil overlaps the second coil in a first direction, which is an optical axis direction; and a second region that does not overlap with the second coil in the first direction.

The third coil may include first and second wires; and a ring portion connected between the first wire and the second wire and having a ring shape, wherein the ring portion overlaps the second coil in the first direction and the first region and the first direction. may include the second region that does not overlap with the second coil.

The first area may overlap the position sensor in the first direction, and the second area may not overlap the position sensor in the first direction.

The length of the first region in the second direction is equal to or smaller than the diameter of the position sensor in the second direction, the second direction is perpendicular to the first direction, and is perpendicular to the length direction of the second coil. can be parallel

A length of the second region in the third direction may be longer than a length of the first region in the third direction, and the third direction may be perpendicular to the first direction and perpendicular to the longitudinal direction of the second coil. there is.

The second area may be positioned closer to a reference line than the first area, and the reference line may be an imaginary straight line passing through a center of the housing and parallel to the optical axis.

A length of the first region in the second direction may be shorter than a length of the second coil in the second direction.

The length of the first region in the third direction is shorter than the length of the second coil in the third direction, the third direction is perpendicular to the first direction, and the longitudinal direction of the second coil may be vertical.

A camera module according to an embodiment includes a lens barrel; a lens driving device according to the above-described embodiment for moving the lens barrel; and an image sensor that converts an image incident through the lens driving device into an electrical signal.

An optical device according to an embodiment includes a display module including a plurality of pixels whose color is changed by an electrical signal; A camera module according to an embodiment that converts an image incident through a lens into an electrical signal; and a control unit controlling operations of the display module and the camera module.

The embodiment can reduce the influence of the induced magnetic field of the OIS coil on the OIS position sensor, and secure stability of OIS feedback control and reliability of hand shake correction.

1 shows an exploded perspective view of a lens driving device.
FIG. 2 is a combined perspective view of the lens driving device from which the cover member of FIG. 1 is removed.
FIG. 3 is an exploded perspective view of a bobbin, a first coil, a first magnet, a second magnet, a first position sensor, and a sensor substrate shown in FIG. 1 .
FIG. 4 is a plan view of the bobbin and the second magnet shown in FIG. 3 .
FIG. 5A is an exploded perspective view of the sensor substrate and the first position sensor shown in FIG. 3 .
FIG. 5B is a rear perspective view of the sensor substrate shown in FIG. 3 according to an embodiment.
6 shows a plan perspective view of the housing shown in FIG. 1;
FIG. 7 is an exploded perspective view of the bottom of the housing, the first magnet, and the second magnet shown in FIG. 1;
FIG. 8 shows a cross-sectional view taken along line II′ shown in FIG. 2 .
FIG. 9 is a plan perspective view in which a bobbin, a housing, an upper elastic member, a first position sensor, a sensor substrate, and a plurality of support members of FIG. 1 are combined.
Figure 10 shows a bottom perspective view in which the bobbin, housing, lower elastic member and a plurality of support members of FIG. 1 are combined.
FIG. 11 is a perspective view illustrating a combination 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 shown in FIG. 1 .
12 is an exploded perspective view of the base, the second coil, and the circuit board shown in FIG. 1;
13A to 13E show exemplary embodiments of the 3-1 coil.
14 shows the relative positional relationship of the first magnet, the second coil, the 3-1 coil, and the first OIS position sensor corresponding to each other.
15 shows an example of directions of magnetic fields of a first magnet, a second coil, and a 3-1 coil corresponding to each other.
16 shows another embodiment of directions of magnetic fields of a first magnet, a second coil, and a 3-1 coil corresponding to each other.
17A and 17B show schematic diagrams for an output experiment of the OIS position sensor according to the shape and arrangement of the 3-1 coil.
Figure 17c shows the results of simulation experiments according to Figures 17a and 17b.
18 is an exploded perspective view of a camera module according to an embodiment.
19 is a perspective view of a portable terminal according to an embodiment.
FIG. 20 shows a configuration diagram of the portable terminal shown in FIG. 19 .

Hereinafter, embodiments will be clearly revealed through the accompanying drawings and description of the embodiments. In the description of the embodiment, each layer (film), region, pattern or structure is “on” or “under” the substrate, each layer (film), region, pad or pattern. In the case where it is described as being formed in, "up / on" and "under / under" include both "directly" or "indirectly" formed through another layer. do. In addition, the criterion for the upper/upper or lower/lower of each layer will be described based on the drawings. Also, like reference numerals denote like elements throughout the description of the drawings.

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

An 'image stabilization device' applied to a small camera module of a mobile device such as a smartphone or tablet PC prevents the outline of the captured image from being formed clearly due to vibration caused by the user's hand shake when capturing a still image. It may refer to a device configured to

Also, an 'auto focusing device' is a device that automatically focuses an image of a subject on an image sensor surface. Such an image stabilization device and auto focusing device may be configured in various ways. A lens driving device according to an embodiment moves an optical module composed of at least one lens in a first direction or a second direction perpendicular to the first direction. and may perform an image stabilization operation and/or an auto focusing operation by moving with respect to a surface formed by the third direction.

FIG. 1 shows a perspective view of a lens driving device 100 according to an embodiment, and FIG. 2 shows 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 130, a lower elastic member 160, a plurality of support members 220, a circuit board 250, a third coil 260, and Base 210 is included.

Also, the lens driving device 100 according to the embodiment may further include a second magnet 190 serving as a sensing magnet for the first position sensor 170 .

In addition, the lens driving device 100 according to the embodiment may further include a second coil 230 interacting with the first magnet 130 for hand shake correction.

In addition, the lens driving device 100 according to the embodiment may further include a second position sensor 240 that senses the strength of the magnetic field of the first magnet 130 for feedback hand shake correction.

First, the cover member 300 will be described.

The cover member 300 includes an upper elastic member 150, a bobbin 110, a first coil 120, a housing 140, a second magnet 190, a first 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 a box shape with an open bottom, an upper end and side walls, and a lower part of the cover member 300 may be coupled to an upper part of the base 210 . The upper end of the cover member 300 may have a polygonal shape, for example, a quadrangle or an octagon.

The cover member 300 may have a hollow at an 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 matter 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 first magnet 130, but may be formed of a magnetic material to function as a yoke.

FIG. 3 shows a combined perspective view of the lens driving device 100 in which the cover member 300 of FIG. 1 is removed, and FIG. 4 shows the bobbin 110, the first coil 120, and the second magnet 190 shown in FIG. ), an exploded perspective view of the first magnets 130-1 to 130-4, the first position sensor 170, and the sensor substrate 180.

Next, the bobbin 110 will be described.

Referring to FIGS. 3 and 4 , the bobbin 110 is disposed inside the housing 140 and moves in a first direction by electromagnetic interaction between the first coil 120 and the first magnet 130, for example, It can move in the 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 shape of the hollow may be circular, elliptical, or polygonal, 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 portion 111a of the bobbin 110 may guide a path through which the first frame connecting portion 153 of the upper elastic member 150 passes.

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

The second protrusion 112 of the bobbin 110 may 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 can be seated.

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

The bobbin 110 is recessed from the upper surface of the bobbin 110 so that the sensor substrate 180 can be inserted in the first direction (z-axis direction), and is between the inner circumferential surface 110a and the outer circumferential surface 110b of the bobbin 110. It may be provided with a support groove 114 provided in.

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

The bobbin 110 may have a groove 116 in which the first position sensor 170 disposed, coupled, or mounted on the sensor substrate 180 is accommodated or disposed.

For example, the bobbin 110 has a 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. It may be provided with a groove 116 provided in. The groove 116 of the bobbin 110 is recessed from the outer circumferential surface 110b of the bobbin 110, and may be connected to or contact the support groove 114.

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

When the contact state between 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 of the housing 140 is set to the initial position, auto focusing Functions can be controlled like one-way control in a conventional Voice Coil Motor (VCM). That is, the bobbin 110 rises when current is supplied to the first coil 120 and the bobbin 120 descends when current supply is cut off, so that an auto focusing function can be implemented.

However, when the position where 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 separated 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 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 circumferential surface 110b (see FIG. 3) of the bobbin 110. The first coil 120 may be disposed not to overlap with the first position sensor 170 in the second or third direction.

The first coil 130 and the first position sensor 170 may be disposed spaced apart from each other on the outer circumferential surface 110b of the bobbin 110 so as not to interfere or overlap each other in the second or third direction. For example, the first coil 120 may be disposed below or below the outer circumferential surface 110a of the bobbin 110, and the first position sensor 170 may be disposed above the first coil 120.

As shown in FIG. 3 , the first coil 120 may be disposed on the outer circumferential surface 110a of the bobbin 110 to be wound clockwise or counterclockwise about the optical axis OA.

As illustrated in FIG. 8 , the first coil 120 may be inserted, disposed, wound, or fixed into the groove 118 formed on the outer circumferential surface 110b of the bobbin 110 .

In FIG. 3 , the first coil 120 may be directly wound on the outer circumferential surface 110b of the bobbin 110, but is not limited thereto. According to another embodiment, the first coil 120 uses a coil ring It may be disposed on the outer circumferential surface 110b of the bobbin 110. Here, the coil ring may be coupled to the bobbin 110 in the same manner as the sensor substrate 180 is inserted into the groove 114 of the bobbin 110 and fixed.

As shown in FIG. 1 , the first coil 120 may be formed in an approximately octagonal shape. The shape of the first coil 120 corresponds to the shape of the outer circumferential surface of the bobbin 110, because the outer circumferential surface of the bobbin 110 has an octagonal shape as illustrated in FIG. 5A.

In addition, for example, at least four surfaces of the first coil 120 may be provided in a straight line, and corner portions connecting these surfaces may also be provided in a straight line, but it is not limited thereto, and it is possible to form a round shape .

The first coil 120 may form electromagnetic force through electromagnetic interaction with the first magnet 130 when a driving signal, for example, current is supplied, and the formed electromagnetic force will move the bobbin 110 in a first direction. can

The first coil 120 may be configured to correspond to the first magnet 130. The first magnet 130 is composed of a single body so that the entire surface facing the first coil 120 has the same polarity. If provided, the first coil 120 may also be configured such that a surface corresponding to the first magnet 130 has the same polarity.

When the first magnet 130 is divided into two or four on a plane perpendicular to the optical axis OA, and the plane facing the first coil 120 is divided into two or more, the first coil 120 also It is also possible to be divided into a number corresponding to the number of divided first magnets 130 .

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 and move together with the bobbin 110 .

When the bobbin 110 moves in the direction of the optical axis OA, the first position sensor 170 may move together with the bobbin 110 . In addition, the first position sensor 170 may detect the sum of the strength of the magnetic field of the second magnet 190 and the strength of the magnetic field of the first magnet 130 according to the movement of the bobbin 110, and based on the detected result An output signal can be generated according to The displacement of the bobbin 110 in the direction of the optical axis OA may be adjusted using the output signal of the first position sensor 170 .

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 implemented as a position detection sensor alone such as a Hall sensor.

The first position sensor 170 may be disposed, coupled, or mounted on the bobbin 110 in various forms, and depending on the form in which the first position sensor 170 is disposed, coupled, or mounted, the first position sensor 170 may receive current in a variety of ways.

The first position sensor 170 may be disposed, coupled, or mounted on the outer circumferential surface 110b of the bobbin 110 .

For example, the first position sensor 170 may be disposed, coupled, or mounted on the sensor substrate 180, and the sensor substrate 180 may be disposed or coupled to the outer circumferential surface 110b of 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 or 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. 4 is a plan view of the bobbin 110 and the first magnets 130: 130-1, 130-2, 130-3, and 130-4 shown in FIG. 3, and FIG. 5A is a sensor substrate shown in FIG. 180 and a separated perspective view of the first position sensor 170 are shown, and FIG. 5B shows a rear perspective view of the sensor substrate 180 shown in FIG. 3 according to an embodiment.

Referring to FIGS. 3 to 5 , the sensor substrate 180 is mounted on the bobbin 110 and may move along with the bobbin 110 in the direction of the optical axis OA.

For example, the sensor substrate 180 may be inserted or disposed in the groove 114 of the bobbin 110 and coupled to the bobbin 110 . The sensor substrate 180 is sufficient as long as it is suitable for being mounted on the bobbin 110, and FIG. 5A illustrates a ring shape, but is not limited thereto.

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

The outer circumferential surface 110b of the bobbin 110 has first side surfaces S1 corresponding to the first side parts 141 of the housing 140 on which the first magnet 130 is disposed, and first side surfaces S1 It may include second side surfaces S2 disposed between and 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 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 groove 116 of the bobbin 110 Can be inserted or placed within.

The first position sensor 170 may be disposed, combined, or mounted in various forms on the upper, middle, or lower side of the outer circumferential surface of the sensor substrate 180 .

For example, the first position sensor 170 is positioned or aligned in the space between the first and second magnets 190 and 130 in the first direction from the initial position of the bobbin 110, and the outer circumferential surface of the sensor substrate 180 It may be disposed on any one of the upper side, middle and lower side of. The first position sensor 170 may receive a driving signal, for example, a current, from the outside through a wire of the sensor substrate 180 .

For example, the first position sensor 170 is positioned or aligned in the space between the first and second magnets 190 and 130 in the first direction from the initial position of the bobbin 110, and the outer circumferential surface of the sensor substrate 180 It can be placed, combined or mounted on the upper side of the. The first position sensor 170 is disposed on the upper side of the outer circumferential surface of the sensor substrate 180 so as to be located as far away from the first coil 120 as possible, so that the first position sensor 170 can move the first position sensor 170 of the first coil 120 in the high frequency region. Malfunction and error of the first position sensor 170 can be prevented by not being affected by the magnetic field.

For example, the sensor substrate 180 may have a mounting groove 183 on the upper side of the outer circumferential surface, and the first position sensor 170 may be disposed, coupled, or mounted in the mounting groove 183 of the sensor substrate 180. can

A tapered inclined surface (not shown) may be provided on at least one surface of the mounting groove 183 of the sensor substrate 180 so that the injection of epoxy for assembling the first position sensor 170 is performed more smoothly. . In addition, although a separate epoxy or the like may not be injected into the mounting groove 183 of the sensing substrate 180, the placement force, bonding force, or mounting force of the first position sensor 170 may be increased by injecting epoxy or the like. there is.

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

When the 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 groove 114 of the bobbin 110 has the groove 114 It can be inserted into and have a fixable shape.

As illustrated in FIGS. 3 to 5, the groove 114 of the bobbin 110 and the body 182 of the sensor substrate 180 may have a circular flat ring or band shape, but the embodiment is not limited thereto. don't According to another embodiment, the groove 114 of the bobbin 110 and the body 182 of the sensor substrate 180 may have a polygonal planar shape.

The body 182 of the sensor substrate 180 extends in contact with the first segment 182a on which the first position sensor 170 is disposed, coupled, or mounted, and the first segment 182a, and extends to the groove of the bobbin 110. It may include a second segment (182b) inserted into (114).

The sensor substrate 180 may be easily inserted into the groove 114 of the bobbin 110 by providing an opening 181 at 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 to 184-4 of the sensor substrate 180 may contact the first inner frame 151 from the body 182 of the sensor substrate 180, for example, the optical axis direction. It may protrude in a first direction or in a direction parallel to the first direction.

The elastic member contact portions 184 - 1 to 184 - 4 of the sensor substrate 180 are portions to be connected or bonded to the first inner frame 151 of the upper elastic member 150 .

The circuit patterns L1 to L4 of the sensor substrate 180 are formed on the body 182 of the sensor substrate 180 and electrically connect the first position sensor 170 and the elastic member contact portions 184-1 to 184-4. can connect

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. Signals output through the output pins P21 and P22 may be in the form of current or voltage.

The input pins P11 and P12 and the output pins P21 and P22 of the first position sensor 170 are electrically connected to the elastic member contact portions 184-1 to 184-4 through the circuit patterns L1 to L4. each can be connected.

According to an embodiment, the first to fourth lines L1 to L4 may be formed to be visible to the naked eye, and according to another embodiment, the first to fourth lines L1 to L4 are not visible to the naked eye. It may be formed on the body 182 of the sensor substrate 180.

Next, the housing 140 will be described.

The housing 140 supports the first magnet 130 for driving and can accommodate the bobbin 110 inside so that the bobbin 110 can move in the direction of the optical axis OA. Also, the housing 140 may support or accommodate the second magnet 190 for sensing.

The housing 140 may have a hollow column shape as a whole. For example, the housing 140 may have a polygonal (eg, quadrangular or octagonal) or circular hollow 201 .

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

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

A surface of the third protrusion 148 of the housing 140 facing the bobbin 110 may have the same shape as the shape of the side 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. 3 and the third protrusion 148 of the housing 140 shown in FIG. 2 The width W2 may have a certain tolerance. Accordingly, 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 force in a direction in which the bobbin 110 rotates around the optical axis OA instead of in the direction of the optical axis OA, the third protrusion 148 of the housing 140 prevents the bobbin 110 from rotating. can

For example, the upper side of the outer periphery of the housing 140 has a square planar shape, but the lower side of the inner periphery may have an octagonal planar shape as illustrated in FIGS. 6 and 7 .

The housing 140 may include a plurality of side parts. For example, the housing 140 may include four first side parts 141 and four second side parts 142, and the width of each of the first side parts 141 is equal to the second side parts ( 142) may be larger than each width.

The first side parts 141 of the housing 140 may be a part where the first magnet 130 is installed. The second side parts 142 of the housing 140 may be located between two adjacent first side parts, and may be a part where the support member 220 is disposed. The first side parts 141 of the housing 140 may interconnect the second side parts 142 of the housing 140 .

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

The housing 140 includes a first seating portion 141a for accommodating the first magnets 130-1, 130-2, 130-3, and 130-4 and a second seating portion 141b for accommodating the second magnet 190. ) can be provided.

For example, the first seating part 141a of the housing 140 may be provided at the inner lower end of the first side parts 141, and the second seating part 141b may be provided on any one of the first side parts 141. It may be provided on the outer top.

In addition, the second seating portion 141b may be located above the first seating portion 141a and may be spaced apart from the first seating portion 141a.

The second magnet 190 may be inserted, disposed, or fixed to the second seating portion 141b, and each of the first magnets 130-1, 130-2, 130-3, and 130-4 may be disposed on the first side of the housing 140. It may be disposed or fixed to the first seating part 141a provided on any one of the corresponding ones 141 .

The first seating portion 141a of the housing 140 may be formed as a groove corresponding to the size of the first magnet 130, and has at least three surfaces facing the first magnet 130, that is, both side surfaces and top surfaces. view can be placed.

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

The first and second magnets 130 and 190 may be fixed to the first and second seating parts 141a and 141b of the housing 140 with an adhesive, but are not limited thereto, and an adhesive member such as double-sided tape, etc. may be used.

Alternatively, instead of forming the first and second seating parts 141a and 141b of the housing 140 as concave grooves as shown in FIGS. 6 and 7 , portions of the first and second magnets 130 and 190 are exposed or It can also be formed with a mounting hole that can be fitted.

For example, the second magnet 190 may be positioned above any one (eg, 130-1) of the first magnets 130-1, 130-2, 130-3, and 130-4. The second magnet 190 may be spaced apart from the first magnet (eg, 130-1). A part of the housing 140 may be disposed between the second magnet 190 and the first 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 pass through the first through hole 147 and be connected to the upper elastic member 150 .

In addition, in order to prevent 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 have at least one first upper support protrusion 143 on an 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, but is not limited thereto, and other In an embodiment, it may be formed on the upper surface of the housing 140 corresponding to the first side portion 141 .

The first upper support protrusion 143 of the housing 140 may have a hemispherical shape as illustrated, or may have a cylindrical shape or a prismatic shape, but is not limited thereto.

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

The housing 140 has a first groove ( 142a) may be provided. That is, damping silicon may be filled in the recess 142a of the housing 140 .

The housing 140 may include a plurality of third stoppers 149 protruding from outer surfaces of the first side parts 141 . The third stopper 149 is to prevent collision with the cover member 300 when the housing 140 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 bottom surface. can Through this configuration, the housing 140 is spaced downward from the base 210 and upward from the cover member 300 so that the height in the optical axis direction can be maintained without vertical interference. Accordingly, the housing 140 may perform a shifting operation in the second and third directions, i.e., forward, backward, left, and right directions, in a plane perpendicular to the optical axis OA.

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

The first magnet 130 may be disposed on the first seating portion 141a of the housing 140 to overlap the first coil 120 in a direction perpendicular to the optical axis OA.

In another embodiment, each of the first and second magnets 130 and 190 are both disposed outside or inside the first side part 141 of the housing 140, or the second side part 142 of the housing 140. It may be disposed both inside or outside of.

Also, in another embodiment, the second magnet 190 may be disposed inside the first side portion 141 of the housing 140, and the first magnet 130 may be disposed on the inside of the first side portion 141 of the housing 140. It can also be placed outside.

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

The first magnet 130 may be composed of one body, and the side facing the first coil 120 may be arranged to be the S pole 132 and the outer side to be the N pole 134. However, it is not limited thereto, and a converse configuration is also possible.

At least two or more first magnets 130 may be installed, and according to an embodiment, four may be installed. At this time, the plane of the first magnet 130 may have a substantially quadrangular shape, or may have a triangular or rhombus shape.

However, the surface of the first magnet 130 facing the first coil 120 may be formed as a flat surface, but this is not limited thereto, and the corresponding surface of the first coil 120 may be a curved surface. A corresponding surface of the magnet 130 may be a curved surface having the same curvature as that of the first coil 120 . With this configuration, the distance to the first coil 120 can be kept constant.

In the case of the embodiment, one first magnet (130-1, 130-2, 130-3, 130-4) may be installed on each of the four first side parts 141 of the housing 140. However, it is not limited thereto, and depending on the design, only one of the first magnet 130 and the first coil 120 may be a flat surface, and the other may be a curved surface. Alternatively, all of the facing surfaces of the first coil 120 and the first magnet 130 may be curved, and in this case, the curvature of the facing surfaces of the first coil 120 and the first magnet 130 is formed to be the same. It can be.

When the plane of the first magnet 130 is rectangular, one pair 130-1 and 130-3 of the plurality of first magnets 130-1 to 130-4 may be disposed in parallel in the second direction, and the other The pairs 130-2 and 130-4 may be arranged in parallel in the third direction. According to such an arrangement structure, it is possible to control the movement of the housing 140 for hand shake correction, which will be described later.

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

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

11 shows the upper elastic member 150, the lower elastic member 160, the first position sensor 170, the sensor substrate 180, the base 210, the support member 220 and the circuit board ( 250) shows a perspective view of the combination.

The upper elastic member 150 may include a plurality of upper elastic members 150 (150-1 to 150-4) electrically isolated from each other and spaced apart from each other.

The elastic member contact portions 184 - 1 to 184 - 4 of the sensor substrate 180 may be electrically connected to at least one of the upper elastic member 150 and the lower elastic member 160 .

For example, FIG. 11 illustrates that the elastic member contact portions 184-1 to 184-4 electrically contact the upper elastic members 150-1 to 150-4, but is not limited thereto. In another embodiment, the elastic member contact portions 184-1 to 184-4 may electrically contact the lower elastic member 160 or electrically contact both the upper elastic member 150 and the lower elastic member 160. there is.

Each of the elastic member contact portions 184-1 to 184-4 electrically connected to the first position sensor 170 may be electrically connected to a corresponding one of the plurality of upper elastic members 150-1 to 150-4. can Each of the plurality of upper elastic members 150-1 to 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 may include a first inner frame 151, a 1-1 outer frame 152a, and a first frame connecting portion 153. can

Each of the second and fourth upper elastic members 150-2 and 150-4 150b may include a first inner frame 151, a 1-1 outer frame 152b, and a first frame connecting portion 153. can

The first inner frame 151 of the first to fourth upper elastic members 150-1 to 150-4 corresponds to one of the bobbin 110 and the elastic member contact parts 184-1 to 184-4. can be combined with

As shown in FIG. 3, when the upper surface 112a of the second protrusion 112 of the bobbin 110 is flat, the first inner frame 151 of the upper elastic member 150 is the first inner frame 151 of the bobbin 110. 2 After being placed on the upper surface 112a of the protrusion 112, it may be fixed by an adhesive member.

The 1-1st 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 1st inner frame 151 and the 1-1st outer frame. The 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 into two halves, but the embodiment is not limited thereto. That is, according to another embodiment, the 1-1st outer frame 152a may be divided in the same shape as the 1-1st outer frame 152b.

The first frame connecting portion 153 may be formed by bending at least once to form a pattern having a predetermined shape. The bobbin 110 may be elastically supported in an upward and/or downward motion in the direction of the optical axis OA through a change in position and fine deformation of the first frame connector 153 .

The first upper support protrusion 143 of the housing 140 may be coupled to and fixed to the 1-1 outer frames 152a and 152b of the upper elastic member 150 illustrated in FIG. 11 . According to the 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. In this case, the first upper support protrusion 143 and the 2-2 through hole 157 may be fixed or coupled by thermal fusion, or may be fixed or coupled by an adhesive material such as epoxy.

Through a conductive connection between the elastic member contact portions 184-1 to 184-4 of the sensor substrate 180 and the first to fourth upper elastic members 150-1 to 150-4, the first position sensor 170 The four pins P11 to P22 of ) may be electrically connected to the first to fourth upper elastic members.

The first to fourth upper elastic members 150-1 to 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 or 1-2 support members 220-1a and 220-1b, and the second upper side 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, 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

The first position sensor 170 receives a driving signal from the circuit board 250 through any two of the first to fourth upper elastic members 150-1 to 150-4 and the support member 220 connected thereto. (eg, driving current) may be applied, and the first position sensor may be applied through the remaining two of the first to fourth upper elastic members 150-1 to 150-4 and the support members 220 connected thereto. An output signal (eg, a sensing voltage) of 170 may be output to the circuit board 250 .

Meanwhile, the lower elastic member 160 may include first and second lower elastic members 160-1 and 160-2 electrically separated from each other and spaced apart 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 and 161-2 and at least one second outer frame 162-1 and 162 -2) and at least one second frame connector 163-1 or 163-2.

The second inner frames 161-1 and 161-2 of the first and second lower elastic members 160-1 and 160-2 may be coupled to the bobbin 110, and the second outer frame 162-2, 162-2) may be coupled to the housing 140. The 2-1 frame connector 163-1 connects the second inner frame 161-1 and the second outer frame 162-1, and the 2-2 frame connector 163-2 connects the two The two outer frames 162-1 and 162-2 may be connected, and the 2-3 frame connection part 163-3 connects the second inner frame 161-2 and the second outer frame 162-2. can connect

In addition, the first lower elastic member 160-1 may further include a first coil frame 164-1, and the second lower elastic member 160-2 may further include the second coil frame 164-2. can include more.

Referring to FIG. 11 , each of the first and second coil frames 164-1 and 164-2 may be connected to either end of the first coil 120 by a conductive connection member such as solder. . In addition, the first and second lower elastic members 160 - 1 and 160 - 2 may receive a driving signal (eg, driving current) from the circuit board 250 and transmit it to the first coil 120 .

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

At least one of the above-described 2-1 to 2-4 frame connectors 163-1 to 163-4 may be bent and formed at least once to form a pattern having a predetermined shape. In particular, the bobbin 110 rises and/or descends in a first direction parallel to the optical axis through a change in position and fine deformation of the 2-1 and 2-3 frame connectors 163-1 and 163-3. It can be supported flexibly.

According to one embodiment, as shown, each of the first and second lower elastic members 160-1 and 160-2 may further include a bent portion 165. The bent portion 165 may be bent in the first direction toward the upper elastic member 150 from the 2-2 frame connection portion 163-2.

The upper elastic member 160 may further include fifth and sixth upper elastic members 150-5 and 150-6. The first to sixth upper elastic members 150-1 to 150-6 may be electrically separated from each other and may be spaced apart 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 first-second outer frame 155 .

The connection frame 154 of the fifth and sixth upper elastic members 150-5 and 150-6 may be connected to the bent portion 165 of the lower elastic member 160 and may extend in the first direction. .

The first and second outer frames 155 of the fifth and sixth upper elastic members 150-5 and 150-6 are bent from the connection frame 154 in a direction perpendicular to the first direction to form a contact with the housing 155. It may be coupled 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 connection frame 154 of the bent portion 165 of 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 And the first-second 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 each of the fifth and sixth upper elastic members 150-5 and 150-6 are bent in the first direction (165). , 154).

Meanwhile, the first and second lower elastic members 160-1 and 160-2 are connected to the circuit board through the fifth and sixth upper elastic members 150-5 and 150-6 connected to the plurality of support members 220. Power may be 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 150-6 and the sixth support member 220-6, and the second lower elastic member ( 160-2 may be connected to the circuit board 250 through the fifth upper elastic member 150-5 and the fifth support member 220-5.

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

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

A position corresponding to the first lower support protrusion 117 of the bobbin 110 in the second inner frames 161-1 and 161-2 of the first and second lower elastic members 160-1 and 160-1, respectively. A third through hole 161a may be formed in a shape corresponding to . In this case, the first lower support protrusion 117 of the bobbin 110 and the third through hole 161a may be fixed by thermal fusion or by an adhesive material such as epoxy.

In addition, the second outer frames 162-1 and 162-2 of each of the first and second lower elastic members 160-1 and 160-2 correspond to the second lower support protrusion 145 of the housing 140. A fourth through hole 162a may be formed at the position. In this case, the second lower support protrusion 145 of the housing 140 and the fourth through hole 162a may be fixed by thermal fusion or by an adhesive material 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 or driving signals are supplied to the first position sensor 170 using two electrically separated upper elastic members, and the output signal output from the first position sensor 170 is electrically separated from the other two upper elastic members. It is possible to transmit power to the circuit board 250 using members, and to supply power or driving signals to the first coil 120 using two electrically separated lower elastic members 160 . However, embodiments are not limited thereto.

That is, according to another embodiment, the role of the plurality of upper elastic members 150 and the role of the plurality of lower elastic members 160 may be interchanged. That is, power can be supplied to the first coil 120 using two electrically separated upper elastic members, and power can be supplied to the first position sensor 170 using two electrically separated lower elastic members. Alternatively, an output signal output from the first position sensor 170 may be transmitted to the circuit board 250 by using two other lower elastic members electrically separated from each other. Although not shown, this is apparent from the above figures.

Next, the support member 220 will be described.

The plurality of support members 220 - 1 to 220 - 6 may be respectively disposed on the second side parts 142 of the housing 140 . For example, two support members 220 may be disposed on each of the four second side parts 142 , but are not limited thereto.

Alternatively, in another embodiment, only one support member may be disposed on each of the two second side portions 142 of the four second side portions 142 of the housing 140, and the other two second side portions ( 142) Two support members may be arranged on each side.

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

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. .

FIG. 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 have a step 211 to which an adhesive can 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 an end of the cover member 300 may be coupled to surface contact.

The step 211 of the base 210 and the end of the cover member 300 may be bonded or fixed by an adhesive or the like.

A support portion 255 having a corresponding size may be formed on a surface of the base 210 facing the portion of the circuit board 250 where the terminal 251 is formed. The supporting portion 255 of the base 210 is formed without a step in a predetermined cross section from the outer surface of the base 210 to support the terminal surface 253 of the circuit board 250 .

A corner of the base 210 may have a second groove 212 . When the corner of the cover member 300 has a protruding shape, the protrusion of the cover member 300 may be engaged with the base 210 at the second groove 212 .

In addition, 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, two seating grooves 215-1 and 215-2 may be provided on the upper surface of the base 210, and the second position sensor 240 is attached to the seating grooves of the base 210 ( 215-1 and 215-2), displacement of the housing 140 in the second and third directions can be sensed. To this end, virtual lines connecting the centers of the seating grooves 215-1 and 215-2 of the base 210 and the center of the base 210 may cross each other. For example, an angle formed by the virtual lines may be 90°, but is not limited thereto.

For example, each of the seating grooves 215 - 1 and 215 - 2 of the base 210 may be aligned with or near the center of the second coil 230 . Alternatively, the center of the second coil 230 and the center of the second position sensor 240 may be aligned.

Based on the circuit board 250, the second coil 230 may be disposed on the upper side and the second position sensor 240 may be disposed on the lower side.

The second position sensor 240 may detect displacement of the housing 140 relative to the base 210 in a direction perpendicular to the optical axis OA (eg, an X axis or a Y axis).

The second position sensor 240 may include two OIS position sensors 240a and 240b disposed to cross or orthogonal to each other in order to detect the displacement of the housing 140 in a direction perpendicular to the optical axis OA. .

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

The circuit board 250 may be bent from an upper surface and may include a plurality of terminals 251 receiving electrical signals from the outside or at least one terminal surface 253 on which pins are formed. .

12, the second coil 230 is implemented in a form provided on the circuit board 250 and a separate circuit member 231, but is not limited thereto, and in other embodiments, the second coil 230 has a ring shape. It may be implemented in the form of a coil block of , implemented in the form of an FP coil, or implemented in the form of a circuit pattern formed on the circuit board 250 .

The circuit member 231 in which the second coil 230 is provided may include a through hole 230a through which the support member 220 passes.

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

The second coil 230 may include a plurality of optical image stabilization (OIS) coils 230-1 to 230-4 corresponding to the plurality of first magnets 130-1 to 130-4.

Each of the plurality of OIS coils 230-1 to 230-4 may correspond to or be aligned with any one of the plurality of first magnets in the first direction.

For example, the plurality of OIS coils 230-1 to 230-4 may be disposed corresponding to four sides of the circuit board 250, but this is not limited thereto.

In FIG. 12 , the second coil 230 includes two OIS coils 230-3 and 230-4 for the second direction and two OIS coils 230-3 and 230-4 for the third direction, but is limited thereto. However, in another embodiment, the second coil may include one or more OIS coils for the second direction and one or more OIS coils for the third direction.

Electromagnetic force may be generated by the interaction of the first magnets 130-1 to 130-4 disposed to face each other and the plurality of OIS coils 230-1 to 230-4, and the electromagnetic force may be used to generate the housing. Hand shake correction may be performed by moving 140 in the second and/or third directions.

The second position sensor 240 may be provided as a Hall sensor, and any sensor capable of detecting the strength of a magnetic field may be used. For example, the second position sensor 240 may be implemented in the form of a driver including a Hall sensor or implemented solely as a position detection sensor such as a Hall sensor.

A plurality of terminals 251 may be installed on the terminal surface 253 of the circuit board 250 . For example, external power is applied through a plurality of terminals 251 installed on the terminal surface 253 of the circuit board 250, and the first and second coils 120 and 230, the first and second position sensors Driving signals or power may be supplied to the 170 and 240, and output signals output from the first and second position sensors 170 and 240 may be output to the outside.

According to the embodiment, the circuit board 250 may be provided with FPCB, but is not limited thereto, and terminals of the circuit board 250 may be directly formed on the surface of the base 210 using a surface electrode method or the like. do.

The circuit board 250 may include through holes 250a1 and 250a2 through which the support member 220 may pass. The support member 220 may be electrically connected to a corresponding circuit pattern disposed on the bottom surface of the circuit board 250 through through-holes 250a1 and 250a2 of the circuit board 250 through soldering or the like. In another embodiment, the circuit board 250 may not have through holes 250a1 and 250a2, and the support member 220 may be electrically connected to a circuit pattern formed on the upper surface of the circuit board 250 through soldering or the like. may be

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

Next, the third coil 260 will be described.

The third coil 260 is disposed between the second position sensor 240 and the second coil 230, a driving signal (eg, driving current) is applied, and generates a magnetic field by the driving signal.

A driving signal is applied to the second coil 230 to drive the OIS for hand shake correction, and a magnetic field may be generated in the second coil 230 by the driving signal.

With respect to the second position sensor 240, the magnetic field of the third coil 260 and the magnetic field of the second coil 230 are generated in opposite directions. For example, the magnetic field of the third coil 260 and the magnetic field of the second coil 230 detected by the second position sensor 240 may be in opposite directions.

The second coil 230 is disposed on the circuit board 250, the second position sensor 240 is disposed under the circuit board 250, and the third coil 260 is provided on the circuit board 250. can For example, the third coil 230 may be implemented in the form of a metal wire patterned on the circuit board 250 .

The third coil 260 may include a 3-1 coil 262a corresponding to the first OIS position sensor 262a and a 3-2 coil 262b corresponding to the second OIS position sensor 262b. can

The 3-1 coil 262a and the 3-2 coil 262b are electrically separated from each other and may be provided on the circuit board 250 to be spaced apart from each other.

The third coil 260 may be electrically connected to the terminal 251 of the circuit board 250, and a driving signal may be provided through the terminal 251 of the circuit board 250.

For example, one end of the 3-1 coil 262a may be electrically connected to any one terminal of any one terminal surface of the circuit board 250, and the other end may be electrically connected to any other terminal surface of the circuit board 2500. It can be electrically connected to any one terminal of.

The 3-2 coil 262b may be electrically connected to two terminals of any one terminal surface of the circuit board 250 .

The electrical connection relationship between the terminals of the terminal surface of the circuit board 250 and the 3-1 and 3-2 coils 262a and 262b is not limited to FIG. 12 and may be implemented in various forms.

The third coil 260 shown in FIG. 12 is formed on the upper surface of the circuit board 250, but is not limited thereto, and in another embodiment, the third coil 260 may be formed on the lower surface of the circuit board 250. there is. In another embodiment, the third coil may be formed on a separate circuit member (not shown) instead of being provided on the circuit board 250 .

The second coil 230 and the third coil 260 may have a ring shape wound clockwise or counterclockwise with respect to the optical axis OA, and the number of turns of the third coil 260 is the second coil ( 230) may be less than the number of turns.

The number of rotations of the third coil 260 may be one or more. For example, the number of rotations of the third coil 260 may be one.

The 3-1 coil 262a and the 3-2 coil 262b may have the same shape and size as each other. The number of revolutions of each of the 3-1 coil 262a and the 3-2 coil 262b may be 1, but is not limited thereto.

For example, each of the 3-1st coil 262a and the 3-1st coil 262b is a first wire having one end connected to any one terminal of the circuit board 250 and any other terminal of the circuit board 250. A second wire having one end connected to the second wire, and a ring portion connected between the other end of the first wire and the other end of the second wire and having a ring shape. In this case, the ring part may be a part where an induced magnetic field is generated by a driving signal (eg, current).

13A to 13E show exemplary embodiments of the 3-1 coil 262a.

13A to 13E, the 3-1 coils 262a1 to 262a5 include first wirings 13a-1 to 13e-1 having one end connected to any one terminal of the circuit board 250, the circuit board Second wirings 13a-2 to 12e-2 having one end connected to any other terminal of 250, and the other ends of the first wirings 13a-1 to 13e-1 and the second wiring 13a-2 to 12e-2) may include ring parts 13a-3 to 13e-3 connected between the other ends and having a ring shape.

The ring parts 13a-3 to 13e-3 may be implemented in various shapes. The ring portions 13a-3, 13d-3, and 13e-3 of FIGS. 13A, 13D, and 13E may have a rectangular shape, and the ring portion 13b-3 of FIG. 13B may have a circular shape, and FIG. 13C The ring portion 13c-3 may have an elliptical shape, but is not limited thereto, and may have a polygonal shape in other embodiments.

13a to 13c and 13e, the first wirings 13a-1 to 13c-1 and 13e-1 and the second wirings 13a-2 to 13c-2 and 13e-2 They may extend or extend in opposite directions, and as shown in FIG. 13D , the first wire 13d-1 and the second wire 13d-2 may extend or extend in the same direction.

The portion where the other ends of the first wirings 13a-1 to 13e-1 and the ends of the rings 13a-3 to 13e-3 are connected, and the other ends of the second wirings 13a-2 to 13e-2 and the rings The parts to which the other ends of (13a-3 to 13e-3) are connected may be spaced apart by a predetermined distance (d1).

For example, d1 may be 5 μm to 1000 μm.

When d1 is less than 5 μm, the pattern process is not easy, and when d1 is greater than 1000 μm, desired magnetic field strength of the third coils 262a1 to 262a5 may not be obtained. Also, for example, d1 may be 50 μm to 1000 μm in order to secure the ease of the pattern process.

Also, in another embodiment, the first wire and the second wire of the ring part may be implemented in a shape that crosses each other.

The ring portions 13a-3 to 13e-3 of the third coil 260 include a first area overlapping the second coil 230-2 or 230-3 in the optical axis OA direction, and the second coil ( 230-2 or 230-3 may include a second area that does not overlap in the optical axis direction, and the second area may overlap at least a portion of the OIS position sensors 2340a and 240b.

The diameter or width of the ring portions 13a-3 to 13e-3 of the third coil 260 in the second direction (eg, the x-axis direction) is the second direction (eg, the x-axis direction) of the OIS position sensor 240a. It may be smaller than or equal to the diameter or width of ), but is not limited thereto, and in another embodiment, the second direction (eg, x-axis) of the ring portions 13a-3 to 13e-3 of the third coil 260 direction) may be greater than the diameter or width of the second direction (eg, x-axis direction) of the OIS position sensor 240a.

In addition, the length of the second region of the ring portions 13a-3 to 13e-3 of the third coil 260 in the third direction (eg, the y-axis direction) is 3 to 13e-3), but may be longer than or equal to the length of the first area in the third direction, but is not limited thereto, and in another embodiment, the length of the second area in the third direction is the length of the first area in the third direction. It may be shorter than the length in three directions.

The ring portions 13a-3 to 13d-3 of the third coil shown in FIGS. 13A to 13D have a single pattern or a ring shape having one turn. On the other hand, in order to improve the reliability of the OIS feedback control by the output of the second position sensor 240 by offsetting the strength of the magnetic field of the second coil 230, the ring part 13c of the third coil 262a5 shown in FIG. 13e is shown in FIG. -3) may be a plurality of patterns or a ring shape having two or more rotations. However, the number of revolutions may be limited within a range that does not limit or hinder OIS driving by interaction between the second coil 230 and the magnet 130 .

For example, the number of rotations of the third coil 262a5 may be 2 to 5 times. Also, in another embodiment, the number of rotations of the third coil 262a5 may be 6 to 10 times. Also, in another embodiment, the number of rotations of the third coil 262a5 may be 11 to 15 times. The number of rotations may be inversely proportional to the size of the regions P2 and P4 overlapping the second coil 230 in the direction of the optical axis OA. For example, if the size of the regions P2 and P4 of the third coil 262a5 overlapping with the second coil 230 in the direction of the optical axis OA is increased, the number of rotations of the third coil 262a5 is reduced, but the second coil 262a5 is reduced. Reliability of OIS feedback control can be improved by offsetting the strength of the magnetic field of 230.

In FIG. 13E, the shape of the ring part 13e-3 is exemplified as a rectangle, but is not limited thereto, and may be a circle, an ellipse, or a polygon other than a rectangle.

In another embodiment, the number of rotations of the ring part 13e-3 shown in FIG. 13E may be one, and the ring part 13e-3 may have a shape in which one part and another part cross each other .

14 shows the relative positional relationship of the first magnet 130-2, the second coil 230-2, the 3-1 coil 262a, and the first OIS position sensor 240a corresponding to each other.

Referring to FIG. 14 , at least a portion of the third coil 260 may overlap the second position sensor 240 in the direction of the optical axis OA. Also, at least a portion of the third coil 260 may overlap the second coil 230 in the direction of the optical axis OA.

For example, at least a portion of each of the 3-1 and 3-2 coils 262a and 262b overlaps a corresponding one of the first and second OIS position sensors 240a and 240b in the direction of the optical axis OA. It can be.

Also, for example, at least a portion of each of the 3-1 and 3-2 coils 262a and 262b overlaps with a corresponding one of the OIS coils 230-1 to 230-4 in the direction of the optical axis OA. can

In addition, for example, the center of each of the first magnet 130-2 or 130-3, the second coil 230-2 or 230-3, and the OIS position sensor 240a or 240b corresponding to each other is an optical axis ( OA) direction to the first center line 14a. For example, the first center line is parallel to the optical axis OA, and the first magnet 130-2 or 130-3, the second coil 230-2 or 230-3, and the OIS position sensor 240a or 130-3 correspond to each other. It may be an imaginary straight line passing through the centers of 240b).

The center of each of the first magnet 130-2 or 130-3, the second coil 230-2 or 230-3, and the OIS position sensor 240a or 240b corresponding to each other is in the direction of the optical axis OA. It can be aligned with the imaginary second center line (14b).

For example, the second center line 14b is perpendicular to the optical axis, parallel to the third direction (eg, y-axis direction), perpendicular to the first center line 14a, and passing through the center of the ring portion of the third coil 262a. It may be an imaginary straight line. For example, the second coil 230-2 or 230-3 may be left-right symmetric with respect to the second center line 14b. Also, the center of each of the OIS position sensors 240a or 240b may be the center of a sensing element that senses the magnetic force of the second coils 230-2 and 230-3.

14, B1 represents the direction of the magnetic field of the first magnet, B2 represents the direction of the induced magnetic field of the first OIS coil 230-2 based on the first drive current IS1, and B3 represents the direction of the second drive current ( IS2) indicates the direction of the induced magnetic field of the 3-1 coil 262a.

For example, directions in which the first driving current IS1 and the second driving current IS2 flow may be opposite to each other, and the direction of the induced magnetic field of the first OIS coil 230-2 and the 3-1 coil 262a ), the direction of the induced magnetic field may be opposite to each other.

15 shows an embodiment of directions of magnetic fields of the first magnet 130-2, the second coil 230-2, and the 3-1 coil 262a corresponding to each other, and FIG. Another embodiment of the directions of the magnetic fields of the first magnet 130-2, the second coil 230-2, and the 3-1 coil 262a is shown.

15 and 16, the directions of the magnetic field B2 induced in the second coil 230-2 and the magnetic field B3 induced in the 3-1 coil 262a are offset from each other or opposite to each other. direction can be For example, the flow directions of the first driving current applied to the second coil 230-2 and the second driving current applied to the 3-1 coil 262a may be opposite to each other.

However, the intensity of the magnetic field B3 induced in the 3-1 coil 262a may be smaller than the intensity of the magnetic field B2 induced in the second coil 230-2. When the strength of the magnetic field B3 induced in the 3-1 coil 262a is equal to or greater than the strength of the magnetic field B2 induced in the second coil 230-2, the 3-1 coil 262a induced in the This is because electromagnetic force of a desired direction or strength between the first magnet 130 and the second coil 230 cannot be obtained because the offset by the magnetic field is too large.

The first and second OIS position sensors 240a and 240b sense the strength of the magnetic field of the first magnets 130-1 to 130-4, and the second coils 230-2 and 230-3 and Since the OIS position sensors 240a and 240b are disposed adjacent to each other, the OIS position sensors 240a and 240b are affected by the magnetic field induced by the second coils 230-2 and 230-3.

Due to the influence of the induced magnetic field generated by the second coils 230-2 and 230-3, the OIS position sensors 240a and 240b measure the magnetic force of the first magnet 130 according to the movement of the housing 140. A change in intensity cannot be accurately detected, which may result in a decrease in reliability of image stabilization.

Performance and stability of OIS control for hand shake correction can be verified through analysis of frequency response characteristics, for example, gain margin and phase margin, by a frequency response analyzer (FRA). .

For example, the performance level of OIS feedback control can be measured by a suppression ratio. For example, the suppression ratio may be defined as a log value (20log(Y)) of the ratio (Y=OUTPUT/INPUT) of the output signal (OUT) of the OIS position sensor and the input signal (INPUT) applied to the second coil.

According to the frequency response characteristics of the OIS position sensor for the suppression ratio, the gain may increase in the frequency domain of the second resonant frequency or higher due to the influence of the magnetic field of the second coil due to magnetic induction, thereby reducing the gain margin. A decrease in the gain margin of the frequency response characteristic with respect to the suppression ratio of the OIS position sensor may cause oscillation in the OIS control and decrease the stability of the OIS feedback control.

By providing a third coil (eg, 262a) generating a magnetic field (B3) having a direction that is offset from the magnetic field (B2) induced in the second coil (eg, 230-2), the embodiment has a secondary resonant frequency It is possible to prevent the gain margin from decreasing in the above frequency domain, and to ensure stability of OIS feedback control and reliability of hand shake compensation.

17a and 17b show schematic diagrams for output experiments of the OIS position sensor according to the shape and arrangement of the 3-1 coil, and FIG. 17c shows simulation experiment results according to FIGS. 17a and 17b. In FIG. 17C, the x-axis represents time, the unit is second, and the y-axis represents the output of the OIS position sensor, and the unit is mV.

Referring to FIG. 17A, the ring portion 13' of the 3-1 coil 262' has a first area P1 overlapping the second coil 230-2 in the optical axis OA direction, and the second coil 230-2. A second region P2 that does not overlap with the coil 230-2 in the optical axis direction may be included.

The first area P1 overlaps the OIS position sensor 240a in the optical axis direction, and the second area P2 does not overlap the OIS position sensor 240a in the optical axis direction.

For example, the first area P1 may include a first portion overlapping the OIS location sensor 240a and a second portion not overlapping the OIS location sensor.

The diameter or width of the ring part 13' of the 3-1 coil 262' in the second direction (eg, the x-axis direction) may be smaller than the diameter or width of the OIS position sensor 240a in the second direction. . For example, the second direction may be parallel to the longitudinal direction of the second coil 230 .

Also, the length D1 of the first area P1 in the second direction is smaller than the diameter of the OIS position sensor 240a in the second direction (D1<D2).

The length L12 of the second region P2 in the third direction (eg, the y-axis direction) is longer than the length L11 of the first region P1 in the third direction (L12>L11). For example, the third direction may be perpendicular to the longitudinal direction of the second coil 230 .

The diameter of the ring portion 13' of the 3-1 coil 262' in the second direction is smaller than the diameter of the OIS coil 230-2 in the second direction.

Also, the length D1 of the first region P1 in the second direction is shorter than the length L21 of the OIS coil 230-2 in the second direction (D1 < L21).

Also, the length L11 of the first region P1 in the third direction is shorter than the length L22 of the OIS coil 230-2 in the third direction (L11<L22).

Also, the second area P2 is positioned closer to the reference line than the first area P1 , and the reference line may be an imaginary straight line that passes through the center of the housing 140 and is parallel to the optical axis. For example, the reference line may be the optical axis OA shown in FIG. 12 .

Referring to FIG. 17B, the ring part 13" of the 3-1 coil 262" has a third area P3 overlapping the second coil 230-2 in the optical axis OA direction, and the second coil 230-2. A fourth region P4 that does not overlap with the coil 230-2 in the optical axis direction may be included. The third area P3 does not overlap with the OIS position sensor 240a in the optical axis direction, and the fourth area P4 does not overlap with the OIS position sensor 240a in the optical axis direction. For example, the third area P3 may include a third portion overlapping the OIS location sensor 240a and a fourth portion not overlapping the OIS location sensor 240a.

The diameter or width in the second direction of the ring portion 13" of the 3-1st coil 262" may be the same as the diameter or width in the second direction of the OIS position sensor 240a.

Also, the length D3 of the third region P3 in the second direction may be equal to the diameter D2 of the OIS position sensor 240a in the second direction.

The length L14 of the fourth region P4 in the third direction is longer than the length L13 of the third region P3 in the third direction (L14>L13).

Further, the length L14 of the fourth area P4 of FIG. 17B in the third direction is longer than the length L12 of the second area P2 of FIG. 17A in the third direction (L14>L12), and g3 It is closer to Ref than g2, and the reliability of OIS feedback control by the OIS position sensor 240a can be further improved.

The diameter of the ring portion 13" of the 3-1 coil 262" in the second direction is smaller than the diameter of the OIS coil 230-2 in the second direction.

Also, the length D3 of the third region P3 in the second direction is shorter than the length L21 of the OIS coil 230-2 in the second direction (D3 < L21).

Also, the length L14 of the third region P3 in the third direction is shorter than the length L22 of the OIS coil 230-2 in the third direction (L14<L22).

Also, the fourth area P4 may be positioned closer to the reference line (eg, the optical axis OA) than the third area P3 .

The ratio (L11:L12) of the length L11 of the first region P1 in the third direction and the length L12 of the second region P2 or the length of the third region P3 in the third direction ( L13) and the length L14 of the fourth region P4 (L13:L14) may be 1:2 to 1:4. Alternatively, in another embodiment, the ratio of L11 and L12 (L11:L12) or the ratio of L13 and L14 (L13:L14) may be 1:2.4 to 1:2.8, but is not limited thereto.

Referring to FIG. 17C, Ref is the OIS position sensor 240a according to the result of detecting the strength of the magnetic field of the first magnet 130 in the condition that the second coil 230 and the third coil 260 are not provided. Indicates the output of , Ref represents a result that is not affected by the magnetic field of the second coil 230 at all.

g1 represents the output of the OIS position sensor 240a under the condition that the second coil 230 is provided and the third coil 260 is not provided, and the effect of the magnetic field generated by the second coil 230 is As a result, the output of the OIS position sensor 240a appears different from Ref.

g2 and g3 represent outputs of the OIS position sensor 240a under the condition that the third coil 260 according to the embodiment is provided. g2 represents the output of the OIS position sensor 240a in the case of FIG. 17A, and g3 represents the output of the OIS position sensor 240a in the case of FIG. 17B.

Compared to the output of the OIS position sensor at g1, the output of the OIS position sensor 240a at g2 and g3 appears closer to Ref. That is, by mitigating the degree of the magnetic field of the second coil 230 that affects the output of the OIS position sensor 240, the magnetic field generated by the third coil 260 reduces the output of the OIS position sensor 240 to a reference value, For example, by approaching Ref, it is possible to prevent the gain margin from decreasing in the frequency domain higher than the second resonant frequency of the frequency response characteristic for the suppression ratio of the OIS position sensor, and to secure the stability of OIS feedback control and the reliability of image stabilization. can

18 is an exploded perspective view of the camera module 200 according to the embodiment.

Referring to FIG. 18 , the camera module includes a lens barrel 400, a lens driving device 100, an adhesive member 710, a filter 610, a first holder 600, a second holder 800, an image sensor ( 810), a motion sensor 820, a controller 830, and a connector 840.

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

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

The adhesive member 710 may couple or attach the base 210 of the lens driving device 100 to the first holder 600 . The adhesive member 710 may serve to prevent foreign matter from entering the lens driving device 100 in addition to the above-described adhesive function.

For example, the adhesive member 710 may be an epoxy, a thermosetting adhesive, or an ultraviolet curable adhesive.

The filter 610 may serve to block light of a specific frequency band from light passing through the lens barrel 400 from being incident to the image sensor 810 . The filter 610 may be an infrared cut filter, but is not limited thereto. In this case, the filter 610 may be disposed parallel to the x-y plane.

A hollow may be formed in a portion of the first holder 600 where the filter 610 is mounted so that light passing through the filter 610 may be incident to the image sensor 810 .

The second holder 800 may be disposed below the first holder 600 , and the image sensor 810 may be mounted on the second holder 600 . The image sensor 810 is a part where light passing through the filter 610 is incident and an image including the light is formed.

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

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

The image sensor 810 may receive an image included in light incident through the lens driving device 100 and convert the received image into an electrical signal.

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

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

The motion sensor 820 outputs rotational angular velocity information caused by the movement of the camera module 200 . The motion sensor 820 may be implemented as a 2-axis or 3-axis gyro sensor or an angular velocity sensor.

The controller 820 may be mounted on the second holder 800 and electrically connected to the second position sensor 240 and the second coil 230 of the lens driving device 100 . For example, the second holder 800 may be electrically connected to the circuit board 250 of the lens driving device 100, and the controller 820 mounted on the second holder 800 is controlled through the circuit board 250. It may be electrically connected to the 2 position sensor 240 and the second coil 230 .

The control unit 830 generates a driving signal capable of performing hand shake correction on the OIS movable unit of the lens driving apparatus 100 based on feedback signals provided from the second position sensor 240 of the lens driving apparatus 100. can be printed out.

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

In addition, the lens driving device 100 according to the embodiment forms an image of an object in space using reflection, refraction, absorption, interference, diffraction, etc., which are characteristics of light, and aims to increase the visual acuity of the eye, or It may be included in an optical instrument for the purpose of recording and reproducing images by means of optical measurement, propagation or transmission of images, etc. For example, an optical device according to an embodiment may include a smart phone and a portable terminal equipped with a camera.

19 is a perspective view of a portable terminal 200A according to an embodiment, and FIG. 20 is a configuration diagram of the portable terminal shown in FIG. 19 .

19 and 20, a portable terminal (200A, hereinafter referred to as a "terminal") includes a body 850, a wireless communication unit 710, an A/V input unit 720, a sensing unit 740, an input/output unit, It may include an output unit 750, a memory unit 760, an interface unit 770, a control unit 780, and a power supply unit 790.

The body 850 shown in FIG. 19 is in the form of a bar, but is not limited thereto, and is a slide type, folder type, or swing type in which two or more sub-bodies are coupled to be relatively movable. , and may have various structures such as a swivel type.

The body 850 may include a case (casing, housing, cover, etc.) constituting an external appearance. For example, the body 850 may be divided into a front case 851 and a rear case 852 . Various electronic components of the terminal may be embedded in the space formed between the front case 851 and the rear case 852 .

The wireless communication unit 710 may include one or more modules enabling wireless communication between the terminal 200A and a wireless communication system or between the terminal 200A and a network in which the terminal 200A is located. For example, the wireless communication unit 710 may include a broadcast reception module 711, a mobile communication module 712, a wireless Internet module 713, a short-distance communication module 714, and a location information module 715. there is.

An audio/video (A/V) input unit 720 is for inputting an audio signal or a video signal, and may include a camera 721 and a microphone 722.

The camera 721 may be the camera 200 including the lens driving device 100 according to the embodiment shown in FIG. 18 .

The sensing unit 740 detects the current state of the terminal 200A, such as the open/closed state of the terminal 200A, the location of the terminal 200A, whether or not there is a user contact, the direction of the terminal 200A, and the acceleration/deceleration of the terminal 200A. By sensing, a sensing signal for controlling the operation of the terminal 200A may be generated. For example, when the terminal 200A is in the form of a slide phone, whether the slide phone is opened or closed may be sensed. In addition, it is responsible for sensing functions related to whether or not the power supply unit 790 supplies power and whether or not the interface unit 770 is connected to an external device.

The input/output unit 750 is for generating input or output related to sight, hearing, or touch. The input/output unit 750 may generate input data for controlling the operation of the terminal 200A, and may also display information processed by the terminal 200A.

The input/output unit 750 may include a keypad unit 730, a display module 751, a sound output module 752, and a touch screen panel 753. The keypad unit 730 may generate input data by keypad input.

The display module 751 may include a plurality of pixels whose colors change according to electrical signals. For example, the display module 751 may be a liquid crystal display, a thin film transistor-liquid crystal display, an organic light-emitting diode, a flexible display, a 3D At least one of 3D displays may be included.

The audio output module 752 outputs audio data received from the wireless communication unit 710 in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, or a broadcast reception mode, or stored in the memory unit 760. Audio data can be output.

The touch screen panel 753 may convert a change in capacitance caused by a user's touch to a specific area of the touch screen into an electrical input signal.

The memory unit 760 may store programs for processing and control of the control unit 780, and may store input/output data (eg, phone book, messages, audio, still images, photos, videos, etc.) can be temporarily stored. For example, the memory unit 760 may store an image captured by the camera 721, for example, a photo or video.

The interface unit 770 serves as a passage through which an external device connected to the terminal 200A is connected. The interface unit 770 receives data from an external device or receives power and transmits it to each component inside the terminal 200A, or transmits data inside the terminal 200A to an external device. For example, the interface unit 770 may include a wired/wireless headset port, an external charger port, a wired/wireless data port, a memory card port, a port connecting a device having an identification module, an audio I/O (Input/ Output) port, video I/O (Input/Output) port, and earphone port.

The controller 780 may control overall operations of the terminal 200A. For example, the controller 780 may perform related control and processing for voice calls, data communications, video calls, and the like. The controller 780 may include the panel controller 144 of the touch screen panel driving unit shown in FIG. 1 or may perform the function of the panel controller 144 .

The controller 780 may include a multimedia module 781 for playing multimedia. The multimedia module 781 may be implemented within the control unit 180 or may be implemented separately from the control unit 780.

The controller 780 may perform a pattern recognition process capable of recognizing handwriting input or drawing input performed on the touch screen as characters and images, respectively.

The power supply unit 790 may receive external power or internal power under the control of the control unit 780 to supply power necessary for the operation of each component.

Features, structures, effects, etc. described in the embodiments above are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, etc. illustrated in each embodiment can be combined or modified with respect to other embodiments by a person having ordinary knowledge in the field to which the embodiments belong. Therefore, contents related to these combinations and variations should be construed as being included in the scope of the present invention.

110: bobbin 120: first coil
130: first magnet 140: housing
150: upper elastic member 160: lower elastic member
170: first position sensor 180: sensor substrate
190: second magnet 200: camera module
210: base 220: support member
230: second coil 240: second position sensor
250: circuit board 260: third coil
300: cover member.

Claims (26)

housing;
a magnet disposed in the housing;
a bobbin disposed inside the housing;
a first coil disposed on an outer circumferential surface of the bobbin and moving the bobbin by interaction with the magnet;
an elastic member coupled to the bobbin and the housing;
a second coil to which a first driving signal is applied and which moves the housing by interaction with the magnet;
a position sensor for sensing the strength of the magnetic field of the magnet according to the movement of the housing; and
A second driving signal is applied and includes a third coil disposed to correspond to the position sensor,
The lens driving device of claim 1 , wherein a first magnetic field of the second coil generated by the first driving signal and a second magnetic field of the third coil generated by the second driving signal cancel each other out. According to claim 1,
The lens driving device further includes a circuit board disposed below the housing and providing the first and second driving signals, wherein the third coil is patterned on the circuit board. According to claim 2,
The second coil is disposed on the circuit board, and the position sensor is disposed below the circuit board. According to claim 1,
Each of the second coil and the third coil has a ring shape wound to rotate in a clockwise or counterclockwise direction with respect to an optical axis, and the number of rotations of the third coil is smaller than the number of rotations of the second coil. Device. According to claim 4,
The number of rotations of the third coil is one lens driving device. According to claim 1,
At least a portion of the third coil overlaps the position sensor in a first direction that is an optical axis direction. According to claim 2,
Each of the first and second driving signals is a current, and a current direction of the first driving signal and a current direction of the second driving signal are opposite to each other. According to claim 1,
An intensity of the second magnetic field is smaller than an intensity of the first magnetic field. The method of claim 2, wherein the third coil,
a first wire having one end connected to any one terminal of the circuit board;
a second wire having one end connected to any other terminal of the circuit board; and
and a ring portion connected between the other end of the first wire and the other end of the second wire and having a ring shape. According to claim 9,
A part where the other end of the first wire and one end of the ring part are connected and a part where the other end of the second wire and the other end of the ring part are connected are spaced apart by a predetermined distance. The method of claim 9, wherein the third coil,
a first region overlapping the second coil in a first direction that is an optical axis direction; and
A lens driving device including a second area that does not overlap with the second coil in the first direction. According to claim 11,
The first area overlaps at least a portion of the position sensor in the first direction. According to claim 11,
A diameter of the third coil in the second direction is equal to or smaller than a diameter of the position sensor in the second direction, and the second direction is perpendicular to the first direction and is perpendicular to the longitudinal direction of the second coil. Parallel lens drive unit. According to claim 11,
The length of the second region of the third coil in the third direction is longer than the length of the first region of the third coil in the third direction, the third direction is perpendicular to the first direction, and A lens drive device perpendicular to the length direction of the coil. According to claim 9,
A diameter of the ring part in the second direction is smaller than a diameter of the second coil in the second direction. According to claim 9,
The center of the position sensor is aligned with the center line of the ring part in a first direction, which is an optical axis direction, and the center line is an imaginary straight line passing through the center of the ring part and perpendicular to the first direction. a housing supporting the magnet;
a bobbin having a first coil disposed on an outer circumferential surface and moving by interaction between the magnet and the first coil;
an elastic member coupled to the bobbin and the housing;
a second coil moving the housing by interaction with the magnet;
a position sensor for sensing the strength of the magnetic field of the magnet according to the movement of the housing; and
And a third coil disposed to correspond to the position sensor,
The third coil,
a first region overlapping the second coil in a first direction that is an optical axis direction; and
A lens driving device including a second area that does not overlap with the second coil in the first direction. The method of claim 17, wherein the third coil,
first and second wires; and
a ring portion connected between the first wire and the second wire and having a ring shape;
The ring part includes the first area overlapping the second coil in the first direction and the second area not overlapping the second coil in the first direction. According to claim 18,
The lens driving device of claim 1 , wherein the first area overlaps the position sensor in the first direction, and the second area does not overlap the position sensor in the first direction. According to claim 17,
The length of the first region in the second direction is equal to or smaller than the diameter of the position sensor in the second direction, the second direction is perpendicular to the first direction, and is perpendicular to the length direction of the second coil. Parallel lens drive unit. According to claim 18,
A length of the second region in the third direction is longer than a length of the first region in the third direction, and the third direction is perpendicular to the first direction and perpendicular to the longitudinal direction of the second coil. drive. According to claim 18,
The second area is located closer to a reference line than the first area, and the reference line is an imaginary straight line passing through the center of the housing and parallel to the optical axis. According to claim 20,
A length of the first region in the second direction is shorter than a length of the second coil in the second direction. According to claim 20,
The length of the first region in the third direction is shorter than the length of the second coil in the third direction, and the third direction is perpendicular to the first direction and perpendicular to the longitudinal direction of the second coil. In-lens driving device. lens barrel;
a lens driving device according to any one of claims 1 to 24 for moving the lens barrel; and
A camera module including an image sensor that converts an image incident through the lens driving device into an electrical signal. a display module including a plurality of pixels whose colors change according to electrical signals;
A camera module according to claim 25 for converting an image incident through a lens into an electrical signal; and
An optical device comprising a control unit controlling operations of the display module and the camera module.

Images