KR20230124525A - Lens driving unit and camera module including the same - Google Patents

Abstract

Embodiments of the present invention include: a support substrate; a seating unit disposed on a support substrate; a first movable unit disposed on the seating unit and movable in the direction of an optical axis; a support member disposed between the support substrate and the seating unit and supporting the first movable unit; and a driving unit which tilts the first movable unit based on the optical axis. Therefore, a lens driving device can be easily manufactured and assembled.

Description

Lens driving unit and camera module including the same {Lens driving unit and camera module including the same}

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

The contents described in this part merely provide background information on the embodiments and do not constitute prior art.

In recent years, the development of IT products such as mobile phones, smart phones, tablet PCs, and laptops with built-in micro digital cameras has been actively conducted.

In the case of a camera module mounted on a small electronic product such as a smartphone, the camera module may be frequently shocked during use, and the camera module may be slightly shaken due to a user's hand shaking during shooting. In view of this point, there has recently been a demand for development of a technology for additionally installing an image stabilization unit to a camera module.

Various means for compensating for hand shake have been studied, and one of them is a technology capable of compensating for hand shake by moving an optical module along x-axis and y-axis corresponding to a plane perpendicular to an optical axis. In the case of this technique, it is necessary to accurately and quickly move the optical system in a plane perpendicular to the optical axis for image correction.

In addition, when the hand shake correction means is built into a small camera module, if the parts for hand shake correction are miniaturized, it is not easy to work in the process of manufacturing and assembling the camera module, and in this work process, there is a problem that the camera module may be defective.

Embodiments are aimed at providing a lens driving device and a camera module including the same, which are easy to manufacture and assemble, and can significantly reduce defects that may occur during such a work process.

The technical problem to be achieved by the embodiment is not limited to the technical problem mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

The camera module according to the embodiment includes a support substrate; a mounting portion disposed on the support substrate; a first movable part disposed on the seating part and movable in an optical axis direction; a support member disposed between the support substrate and the seating portion and supporting the first movable portion; and a driving unit for tilting the first movable unit based on an optical axis.

The mounting portion may be tilted relative to the optical axis with respect to the support substrate.

The driving unit may include a coil and a magnet for tilting the first movable unit based on the optical axis by electromagnetic interaction.

The seating part may contact the first movable part. The support member may be coupled to the seating portion.

The first movable part may be tilted on an x-y plane perpendicular to the optical axis. Hand shake correction may be performed by tilting the first movable unit. The magnet may include a plurality of magnets, and the coil may include a plurality of coils corresponding to the plurality of magnets. The plurality of magnets may be arranged symmetrically with respect to the center of the mounting portion. A tilt angle of the first movable unit may be 0.1° to 4°. The first movable part includes a housing; and a bobbin disposed in the housing and moving in an optical axis direction.

The support member may include a first support member disposed at a corner portion or a side portion of the seating portion. The support member may include a second support member disposed at a central portion of the seating portion.

A camera module according to another embodiment includes a support substrate; a first movable part disposed on the support substrate and movable in an optical axis direction; a seating portion disposed below the first movable portion and in contact with the first movable portion; a support member supporting the first movable part; and a driving unit for tilting the seating unit and the first movable unit based on an optical axis.

The driving unit may include a coil and a magnet for tilting the first movable unit based on the optical axis by electromagnetic interaction.

The camera module may further include an image sensor.

In the embodiment, the second movable unit for hand shake correction is provided separately from the first movable unit performing auto focusing, so that the lens driving device can be easily manufactured and assembled.

1 is a perspective view illustrating a first movable part of a lens driving device according to an exemplary embodiment.
2 is an exploded perspective view illustrating a first movable part of a lens driving device according to an exemplary embodiment.
3 is a front view illustrating a lens driving device according to an exemplary embodiment.
4 is a plan view showing a bracket according to an embodiment.
5 is a plan view illustrating a part of a second movable unit according to an exemplary embodiment.
FIG. 6 is an enlarged view of part A of FIG. 3 .
7 is a front view illustrating a lens driving device according to another embodiment.
8 is a front view illustrating a lens driving device according to another exemplary embodiment.
9 is a diagram illustrating an operation of a lens driving device according to an exemplary embodiment.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. Embodiments can apply various changes and can have various forms, and specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the embodiments to a specific form disclosed, and should be understood to include all modifications, equivalents, or substitutes included in the spirit and technical scope of the embodiments. In this process, the size or shape of the components shown in the drawings may be exaggerated for clarity and convenience of description.

Terms such as "first" and "second" may be used to describe various components, but the components should not be limited by the terms. These terms are only used for the purpose of distinguishing one component from another. In addition, terms specifically defined in consideration of the configuration and operation of the embodiment are only for describing the embodiment, and do not limit the scope of the embodiment.

In the description of the embodiment, in the case where it is described as being formed on "upper (above)" or "lower (on or under)" of each element, on or under (on or under) ) includes both elements formed by directly contacting each other or by indirectly placing one or more other elements between the two elements. In addition, when expressed as “up (up)” or “down (down) (on or under)”, it may include the meaning of not only the upward direction but also the downward direction based on one element.

In addition, relational terms such as "upper/upper/upper" and "lower/lower/lower" used below do not necessarily require or imply any physical or logical relationship or order between such entities or elements, It may be used only to distinguish one entity or element from another entity or element.

In addition, an orthogonal coordinate system (x, y, z) can be used in the drawing. In the drawing, the x-axis and the y-axis mean planes perpendicular to the optical axis, and for convenience, the optical axis direction (z-axis direction) can be referred to as a first direction, an x-axis direction as a second direction, and a y-axis direction as a third direction. .

1 is a perspective view illustrating a first movable part of a lens driving device according to an exemplary embodiment. 2 is an exploded perspective view illustrating a first movable part of a lens driving device according to an exemplary embodiment.

An auto focusing device applied to a small camera module of a mobile device such as a smart phone or a tablet PC is a device that automatically focuses an image of a subject on an image sensor (not shown) surface. Such an auto focusing device may be configured in various ways. In the case of an embodiment, such an auto focusing operation may be performed by moving an optical module composed of a plurality of lenses in a first direction.

As shown in FIG. 2 , the first movable unit of the lens driving device according to the embodiment may include an auto focusing unit. In this case, the auto focusing unit may perform an auto focusing function of the lens. The auto focusing unit includes a bobbin 110, a first coil 120, a first magnet 130, a housing 140, an upper elastic member 150, a lower elastic member 160, a position sensor 170, a second A magnet 180 may be included. However, in the embodiment, the position sensor 170 may not be provided according to design selection.

The bobbin 110 has a first coil 120 disposed inside the first magnet 130 on an outer circumferential surface thereof, and the first coil 120 is provided for electromagnetic interaction between the first magnet 130 and the first coil 120. It may be installed in the inner space of the housing 140 to be reciprocally movable in the first direction. A first coil 120 is installed on the outer circumferential surface of the bobbin 110 to enable electromagnetic interaction with the first magnet 130 .

In addition, the bobbin 110 is elastically supported by the upper and lower elastic members 150 and 160 and moves in a first direction to perform an auto focusing function.

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

For example, a female screw thread may be formed on an inner circumferential surface of the bobbin 110 and a male screw thread corresponding to the screw thread may be formed on an outer circumferential surface of the lens barrel, and the lens barrel may be coupled to the bobbin 110 by screwing of the female screw thread.

However, this is not limited thereto, and the lens barrel may be directly fixed to the inside of the bobbin 110 by a method other than screw coupling without forming a thread on the inner circumferential surface of the bobbin 110 . Alternatively, the one or more lenses may be integrally formed with the bobbin 110 without a lens barrel.

The lens coupled to the lens barrel may be composed of one sheet, or two or more lenses may form an optical system.

The auto focusing function is controlled according to the direction of the current, and the auto focusing function may be implemented by moving the bobbin 110 in the first direction. For example, when a forward current is applied, the bobbin 110 may move upward from an initial position, and when a reverse current is applied, the bobbin 110 may move downward from an initial position.

Alternatively, the moving distance in one direction from the initial position may be increased or decreased by adjusting the amount of one-way current.

A plurality of upper support protrusions and lower support protrusions may protrude from the upper and lower surfaces of the bobbin 110 . The upper support protrusion may be provided in a cylindrical shape or a prismatic shape, and may couple and fix the upper elastic member 150 . The lower support protrusion may be provided in a cylindrical shape or a prismatic shape like the upper support protrusion described above, and may couple and fix the lower elastic member 160 .

In this case, a through hole corresponding to the upper support protrusion may be formed in the upper elastic member 150 , and a through hole corresponding to the lower support protrusion may be formed in the lower elastic member 160 . Each of the support protrusions and the through hole may be fixedly coupled by thermal fusion or an adhesive member such as epoxy.

The housing 140 may have a hollow pillar shape supporting the first magnet 130 and may be formed in a substantially rectangular shape. The first magnet 130 may be coupled to and disposed in the housing 140 . In addition, as described above, a bobbin supported by the housing 140 and moving in the first direction may be disposed on the inner circumferential surface of the housing 140 .

Housing 140 may have four flat sides. A side surface of the housing 140 may have an area corresponding to or larger than that of the first magnet 130 . A through hole or groove for a magnet in which the pair of first magnets 130 are seated may be provided on each of opposite side surfaces of the four sides of the housing 140 .

Accordingly, the pair of first magnets 130 may be disposed symmetrically with respect to the center of the housing 140 . If the first magnets 130 are disposed facing each other while being biased to one side regardless of the center of the housing 140, the electromagnetic force acts on the coil 120 of the bobbin 110 to be biased to one side, so the bobbin ( 110) is likely to be tilted. Therefore, it is appropriate that the pair of first magnets 130 are disposed symmetrically with respect to the center of the housing 140 .

In addition, a through hole for a sensor in which a position sensor 170 to be described later is seated may be provided on a surface other than the side on which the first magnet 130 is seated among the four side surfaces of the housing 140 .

The upper elastic member 150 and the lower elastic member 160 are coupled to the bobbin 110 and the housing 140, and may be provided on upper and lower sides of the bobbin 110 and the housing 140, respectively. .

The upper elastic member 150 and the lower elastic member 160 may elastically support the upward and/or downward movement of the bobbin 110 in the first direction. The upper elastic member 150 and the lower elastic member 160 may be provided as leaf springs.

As shown in FIG. 2 , the lower elastic member 160 may be provided in two pieces separated from each other. Through this two-part structure, each divided part of the lower elastic member 160 may receive currents of different polarities or different power sources.

Also, as a modified embodiment, the upper elastic member 150 may have a two-part structure and the lower elastic member 160 may have an integral structure.

Meanwhile, the upper elastic member 150, the lower elastic member 160, the bobbin 110, and the housing 140 may be assembled through thermal fusion and/or bonding using an adhesive. At this time, for example, the fixing operation may be completed by bonding using an adhesive after fixing by thermal fusion.

The position sensor 170 may be a displacement sensing unit that determines a displacement value of the bobbin 110 in the first direction together with the second magnet 180 of the bobbin 110 to be described later. To this end, the position sensor 170 and the through hole for the sensor may be disposed at a position opposite to the position of the second magnet 180 .

The position sensor 170 may be a sensor that detects a change in magnetic force emitted from the second magnet 180 of the bobbin 110 . Also, the position sensor 170 may be a Hall sensor.

However, this is an example, and this embodiment is not limited to the Hall sensor, and any sensor capable of detecting a change in magnetic force can be used, and any sensor capable of detecting a position other than magnetic force can be used. For example, a method using a photo reflector or the like is also possible.

The second magnet 180 may be coupled to the bobbin 110 . Due to this, the second magnet 180 can move in the first direction by the same displacement as the bobbin 110 when the bobbin 110 moves in the first direction.

In addition, the second magnet 180 may be composed of one body, and may be arranged so that the upper direction of the bobbin 110 is the N pole and the lower direction of the bobbin 110 is the S pole. However, it is not limited thereto, and a converse configuration is also possible.

Also, the second magnet 180 may be divided into two in a plane perpendicular to the optical axis. The second magnet 180 may be spaced apart from the position sensor 170 by a predetermined distance in a direction perpendicular to the first direction.

The base 210 is disposed under the bobbin 110, may be provided in a substantially rectangular shape, and the printed circuit board 250 and the lower elastic member 160 may be seated.

In addition, the cover member 300 may be coupled to the upper portion of the base 210, and the base 210 and the cover member 300 may be fixed and sealed by an adhesive or the like at each end in contact with each other.

The printed circuit board 250 may be coupled to one side of the housing 140 . A terminal surface 253 may be formed on the printed circuit board 250 . A plurality of terminals 251 are disposed on the terminal surface 253 to receive external power and supply current to the coil 120 and the position sensor 170 of the bobbin 110 .

The number of terminals 251 formed on the printed circuit board 250 may be increased or decreased according to the types of components requiring control. On the other hand, according to this embodiment, the printed circuit board 250 may be provided with FPCB.

The printed circuit board 250 may include a controller that readjusts the amount of current applied to the coil 120 based on the displacement value sensed by the displacement sensor. That is, the control unit may be mounted on the printed circuit board 250 .

In addition, in another embodiment, the control unit may be mounted on a separate board without mounting on the printed circuit board 250, which may be a board on which an image sensor of a camera module is mounted or a separate board. there is.

The cover member 300 may be provided in a substantially box shape, may accommodate the auto focusing unit, a part of the printed circuit board 250, and the like, and may be combined with the base 210.

The cover member 300 protects the auto focusing unit, the printed circuit board 250, etc. accommodated therein from being damaged, and in particular, the first magnet 130, the first coil 120, etc. accommodated therein. It is possible to focus the electromagnetic field by limiting the leakage of the electromagnetic field generated by the outside.

3 is a front view illustrating a lens driving device according to an exemplary embodiment. 4 is a plan view showing a bracket 620 according to an embodiment. 5 is a plan view showing a part of the second movable part 20 according to an embodiment. FIG. 6 is an enlarged view of part A of FIG. 3 .

The second movable unit 20 is provided below the first movable unit 10 that performs auto focusing in the first direction and moves the first movable unit 10 in a second or third direction perpendicular to the first direction. can play a role in moving The second movable part 20 includes a seating part 510, a support substrate 520, a first support member 530, a second support member 540, a third magnet 550, and a third coil 560. can include

The seating part 510 is a part where the base 210 provided in the first movable part 10 is seated. The seating part 510 may serve to support the first movable part 10 by being coupled or fixed to the first movable part 10 . The seating portion 510 may be provided in a substantially rectangular plate shape except for a protruding portion formed to be coupled with the first support member 530 at the edge.

When current is applied to the third coil 560, the seating part 510 tilts or shifts with respect to the support substrate 520 due to electromagnetic interaction between the third magnet 550 and the third coil 560. (shift, parallel movement), and as the seating part 510 tilts or shifts, the first movable part 10 may also tilt or shift.

With this tilt or shift method, the second movable unit 20 may perform hand shake correction by moving the first movable unit 10 in a second direction and/or a third direction perpendicular to the first direction.

The mounting portion 510 and the base 210 may be fixed with an adhesive or the like. At this time, adhesives having various properties may be used. For example, epoxy, heat-curable adhesives, light-curable adhesives, and the like may be used, and in the case of light-curable adhesives, UV-curable adhesives may be used.

The support substrate 520 may be provided under the seating portion 510 and spaced apart from the support substrate 520 . The first support member 530 and the second support member 540 may be coupled or fixed to the support substrate 520 . Like the seating portion 510, the support substrate 520 may be provided in a substantially rectangular plate shape except for a protruding portion formed to be coupled to the first support member 530 at the edge.

The support substrate 520 may support the first support member 530 and the second support member 540 by fixing lower portions of the first support member 530 and the second support member 540 .

Meanwhile, a third coil 560 may be provided on the support substrate 520, and in order to supply current to the third coil 560, the support substrate 520 may be provided with circuits and various devices, A connector 610 may be connected to receive external power.

The first support member 530 is provided on the edge of the seating portion 510 and the support substrate 520, one side is coupled to the seating portion 510 and the other side is coupled to the support substrate 520. there is. At this time, the other side, that is, the lower part of the first support member 530 coupled to the support substrate 520 may be fixedly coupled to the support substrate 520 . At this time, the first support member 530 may be provided with a material having elasticity.

Accordingly, even if the seating part 510 is tilted or shifted with respect to the support substrate 520 by the electromagnetic interaction between the third magnet 550 and the third coil 560, the first support member 530 may not be separated from the support substrate 520 .

Meanwhile, one side, that is, the upper part of the first support member 530 coupled to the seating portion 510 may be provided to be inserted into a groove formed in the seating portion 510 . Accordingly, when the seating part 510 is tilted or shifted with respect to the support substrate 520 by the electromagnetic interaction between the third magnet 550 and the third coil 560, the first support member 530 The upper part of ) may be provided to slide with respect to the groove formed in the seating part 510 .

As shown in FIG. 5, a plurality of first support members 530 may be provided, and each of the first support members 530 may have a rectangular plate shape when viewed in a first direction, and the seating portion 510 and It may be provided at each corner and/or side of the support substrate 520 .

In one embodiment, the plurality of first support members 530 may be provided at corners of the seating portion 510 and the support substrate 520 , respectively. At this time, at least one first support member 530 is provided at each corner, and at least four first support members 530 may be provided at the seating portion 510 and the support substrate 520. .

Meanwhile, two or more of the plurality of first support members 530 may be provided at each corner. However, in order to prevent the elastic force of the first support members 530 from being deflected in a specific direction, the first support members 530 are arranged based on the center of the seating portion 510 and the support substrate 520. It is appropriate to be provided at positions symmetrical to each other.

In another embodiment, the plurality of first support members 530 may be disposed at the central portion of each side of the seating portion 510 and the support substrate 520 . At this time, at least one first support member 530 is provided on each side, and at least four first support members 530 are provided on the seating portion 510 and the support substrate 520. can

Meanwhile, two or more of the plurality of first support members 530 may be provided at the center of each side. However, in order to prevent the elastic force deflection of the first support members 530, the first support members 530 are provided at symmetrical positions with respect to the center of the seating portion 510 and the support substrate 520. it is appropriate to be

As another embodiment, as shown in FIG. 5 , the plurality of first support members 530 are aligned along the sides at each of the four side portions of the seating portion 510 and the support substrate 520. may be placed.

Even in this case, in order to prevent the elastic force deflection of the first support members 530, the first support members 530 are positioned symmetrically with respect to the center of the seating part 510 and the support substrate 520. It is appropriate to provide

When the seating part 510 is tilted or shifted with respect to the support substrate 520 by the electromagnetic interaction between the third magnet 550 and the third coil 560, the first support member 530 Bending may occur.

Since the bending direction of the first support member 530 changes as the tilt or shift direction changes, it is appropriate for the first support member 530 to be made of a material having elasticity in order to cope with such bending. do. Therefore, the first support member 530 may be provided with, for example, a coil spring having elasticity.

The second support member 540 is provided at the center of the seating portion 510 and the support substrate 520, one side is coupled to the seating portion 510 and the other side is coupled to the support substrate 520. there is. The second support members 540 may be provided in plurality, and each of the second support members 540 may be arranged to be aligned at regular intervals in the second and third directions.

When the seating part 510 is tilted or shifted with respect to the support substrate 520 by the electromagnetic interaction between the third magnet 550 and the third coil 560, the first Some of the two support members 540 may be extended in the longitudinal direction, and others may be compressed in the longitudinal direction.

As the tilting or shifting direction changes, each of the second support members 540 repeats extension or compression, so to cope with this, the second support member 540 is made of a material having elasticity. It is appropriate.

As shown in FIG. 6 , one embodiment of the second support member 540 may include a coiled spring 541 and a wire 542 . One end, that is, an upper end of the coiled spring 541 may be coupled to the wire 542 . The other end, that is, the lower end of the coiled spring 541 may have an extended end, and the end may be coupled to the upper surface of the support substrate 520 by, for example, soldering. However, the end portion may be coupled to the upper surface of the support plate by an adhesive.

When the seating portion 510 is tilted or shifted with respect to the support substrate 520, the coiled spring 541 may be extended or compressed according to the tilted or shifted direction.

The lower end of the wire 542 may be coupled to one end, that is, the upper end of the coiled spring 541 and formed of an elastic material. An upper end of the wire 542 may support the seating portion 510 . In the embodiment, the upper end of the wire 542 may be coupled to the lower surface of the seating part 510 by soldering. However, the upper end of the wire 542 may be coupled to the lower surface of the seating part 510 by an adhesive.

When the seating portion 510 is tilted or shifted, the wire 542 may support the seating portion 510 while rising or falling in a first direction as the coiled spring 541 is extended or compressed. At this time, since bending may occur when the wire 542 rises or falls, it may be formed of an elastic material to cope with such bending.

As described above, the upper end of the second support member 540 or the end of the coiled spring 541 may be coupled to the seating portion 510 or the support substrate 520 by soldering. can be performed in a variety of ways. For example, in order to prevent defects from occurring in the soldering portion S during the soldering operation, halogen soldering may be performed.

Meanwhile, the second support member 540 may be provided as a pogo pin in an embodiment different from the above, which will be described later with reference to FIG. 7 .

The second movable part 20 may further include a bracket 620 . The bracket 620 is provided at a position corresponding to the second support members 540 in the central portion of the support substrate 520 to accommodate the second support members 540, and the second support member 540 It may serve to support the second support members 540 so that they are provided in the center at regular intervals from each other.

To this end, the bracket 620 may include an accommodating portion 621 corresponding to the shape and number of the second support members 540 . That is, as shown in FIG. 6 , a plurality of accommodating parts 621 may be provided so as to be aligned at regular intervals in the second and third directions corresponding to the second support members 540 .

On the other hand, as shown in FIG. 5, the accommodating portion 621 includes a large-diameter portion accommodating the coiled spring 541 of the second support member 540, the end of the coiled spring 541, or It may include a small diameter portion accommodating the wire 542 .

The third magnet 550 may be disposed on a lower surface of the seating part 510 . The third magnet 550 may be coupled to the lower surface of the seating portion 510, for example, by an adhesive, and the characteristics and types of the adhesive are as described above.

The force generated by the electromagnetic interaction between the third magnet 550 and the third coil 560, that is, the electromagnetic force, causes the third magnet 550 to couple to the seating portion 510 and the seating portion 510. The coupled first movable part 10 may be tilted or shifted.

As shown in FIG. 5 , the third magnet 550 may be provided in four symmetrical with respect to the center of the mounting portion 510, but is not limited thereto. That is, two third magnets 550 may be provided, and virtual lines extending from each third magnet 550 in the second and third directions may be orthogonal to each other. In this structure, each of the third magnets 550 together with the third coil 560 can tilt or shift the seating part 510 and the first movable part 10 in the second and third directions, respectively. there is.

Meanwhile, in FIG. 5 , the third magnet 550 is disposed along each side of the rectangular seating portion 510 , but may be disposed at a corner of the seating portion 510 . In addition, the third magnet 550 may be provided in plural at each side or corner of the seating portion 510 along the second or third direction.

When the third magnet 550 is disposed at a corner of the mounting portion 510, the third magnet 550 may be formed in a quadrangular, trapezoidal, or triangular shape when viewed in the first direction.

The third coil 560 may be disposed on the upper surface of the support substrate 520 . The coil may be disposed to be spaced apart from the magnet in a first direction, and may be disposed to face the magnet.

As shown in FIG. 5 , the third coil 560 may be provided in four symmetrical with respect to the center of the support substrate 520, but is not limited thereto. That is, like the third magnet 550, it is possible to install only two magnets, such as one for the second direction and one for the third direction, or may be installed in a number exceeding four.

The third coil 560 forms a circuit pattern in the shape of the third coil 560 on the support substrate 520, and an additional third coil 560 may be disposed above the support substrate 520. , but not limited thereto. That is, without forming a circuit pattern in the shape of the third coil 560 on the support substrate 520 , only a separate third coil 560 may be disposed on the support substrate 520 .

Alternatively, it is also possible to configure the third coil 560 by winding coil strands in a donut shape or to form the third coil 560 in an FP coil shape and electrically connect it to the support substrate 520 .

The second movable part 20 may further include a connector 610 . The connector 610 is electrically connected to the support substrate 520 and electrically and mechanically connected to an external power source to supply driving current to the support substrate 520 .

The second movable part 20 may further include a shield member 630 . The shield member 630 has a lower portion coupled to the support substrate 520, and includes the first support member 530, the second support member 540, the third magnet 550, and the third coil 560. , bracket 620, etc. can be accommodated.

The shield member 630 forms a part of the exterior of the second movable part 20 and can protect the above-described components accommodated therein from being damaged. In particular, leakage of the electromagnetic field generated by the third magnet 550, the third coil 560, etc. accommodated therein can be restricted so that the electromagnetic field can be focused.

7 is a front view illustrating a lens driving device according to another embodiment. As shown in FIG. 7 , the second support member 540 may be provided as a pogo pin.

As is generally known, the pogo pin may include a spring and a pressure pin supported by an elastic member such as a spring, and the pressure pin is pressed by the elastic member so that its end can press a target in contact. can be provided with

Therefore, when a pogo pin is used as the second support member 540, the pogo pin has a pressing force, so that even if the seating portion 510 is tilted or shifted, the pressing pin moves in the first direction, thereby moving the end of the pressing pin. By maintaining contact with the lower surface of the seating portion 510 , the pogo pin can stably support the seating portion 510 .

Meanwhile, both ends of the pogo pin may be coupled to the lower surface of the mounting portion 510 and the upper surface of the support substrate 520 by adhesive or soldering, respectively. However, it is not limited thereto. That is, as described above, even if the seating portion 510 is tilted or shifted, the end of the pressure pin and the lower surface of the seating portion 510 can maintain contact, so that the pogo pin is connected to the seating portion 510 and It may not be fixed with the support substrate 520 by adhesive or soldering.

Also, a bracket 620 for supporting the pogo pin may be used, and the structure of the bracket 620 is the same as described above.

8 is a front view illustrating a lens driving device according to another exemplary embodiment. As shown in FIG. 8 , the second movable part 20 may further include a coupling member 640 and a fixing member 650 .

The coupling member 640 may be provided in a substantially rectangular plate shape, and is provided between the base 210 and the seating portion 510 to serve to couple the base 210 to the seating portion 510. can When the first movable part 10 and the second movable part 20 are coupled to each other, it is difficult to bond the lower surface of the base 210 and the upper surface of the seating part 510 with an adhesive, or the lens is driven during the bonding process. Poor assembly of the device may occur.

Therefore, the coupling member 640 can play a role of facilitating the operation of coupling the first movable unit 10 and the second movable unit 20 to each other and significantly reducing defects that occur during the bonding operation for coupling.

The coupling member 640 may first be coupled to each other using the base 210 and an adhesive. Next, after the first movable unit 10 and the second movable unit 20 are aligned so that their optical axes coincide with each other, the coupling member 640 may be fixed to the seating unit 510 by the fixing member 650 .

As shown in FIG. 8, the fixing member 650 couples the coupling member 640 and the seating portion 510 to each other at a portion where the coupling member 640 and the seating portion 510 do not come into surface contact with each other. or can be fixed. At this time, both ends of the fixing member 650 may be bonded to the coupling member 640 and the mounting portion 510 by an adhesive, and the characteristics and types of the adhesive used are as described above.

The fixing member 650 may be provided in various forms. For example, the fixing member 650 may be provided in the form of arranging a plurality of wires 542 at regular intervals along each side of the coupling member 640, or formed in the form of a beam so that its longitudinal direction is It may be provided in a form disposed in each side direction of the coupling member 640.

9 is a diagram illustrating an operation of a lens driving device according to an exemplary embodiment.

When a current is applied to the coil, the force generated by the magnetic field of the third magnet 550 and the current flowing through the coil, that is, the electromagnetic interaction between the third magnet 550 and the third coil 560, that is, the electromagnetic force. is determined by Fleming's left hand rule.

At this time, the third magnet 550 rises or falls in the first direction with respect to the third coil 560 by controlling the direction of the current by the control unit (not shown) provided in the support substrate 520 or a separate device. The direction of the electromagnetic force can be adjusted.

As shown in FIG. 9, by adjusting the direction of the current applied to the coil, for example, the third magnet 550 receives force in an upward direction on the right side of the drawing and a downward force on the left side of the drawing. Accordingly, a phenomenon in which the first movable unit 10 is tilted on the x-y plane perpendicular to the optical axis, that is, a tilt occurs.

By tilting, the first movable part 10 can move in the second direction and/or the third direction, and in this way, the lens driving device moves the first movable part 10 in the second and/or third direction. Image stabilization can be performed by moving .

In addition, as the first movable part 10 is tilted on the x-y plane, the first movable part 10 horizontally moves in the second and/or third directions, that is, a shift may occur.

At this time, the tilt angle (θ), that is, the angle at which the first movable part 10 is inclined on the x-y plane with respect to the optical axis is appropriately 0.1 ° to 4 °, more preferably 0.5 ° to 1.5 ° is appropriate.

In the embodiment, the second movable unit 20 for hand shake correction is provided separately from the first movable unit 10 for performing auto-focusing, so that a lens driving device can be easily manufactured and assembled.

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

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

The lens barrel is as described above, and the printed circuit board 250 may form a bottom surface of the camera module from a portion where the image sensor is mounted.

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

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

A separate terminal member may be installed on the base 210 to conduct electricity with the printed circuit board 250, or the terminal may be integrally formed using a surface electrode or the like. Meanwhile, the base 210 may function as a sensor holder to protect the image sensor, and in this case, a protrusion may be formed downward along a side surface of the base 210 . However, this is not an essential configuration, and although not shown, a separate sensor holder may be disposed below the base 210 to perform its role.

Although only a few have been described as described above in relation to the embodiments, various other forms of implementation are possible. The technical contents of the above-described embodiments may be combined in various forms unless they are incompatible with each other, and through this, may be implemented in a new embodiment.

10: first movable part
50: second movable part
210: base
510: seating part
520: support substrate
530: first support member
540: second support member
541: coiled spring
542: wire
550: third magnet
560: third coil
610: connector
620: bracket
621: receiving part
630: shield member
640: coupling member
650: fixing member

Claims (17)

support substrate;
a mounting portion disposed on the support substrate;
a first movable part disposed on the seating part and movable in an optical axis direction;
a support member disposed between the support substrate and the seating portion and supporting the first movable portion; and
A camera module comprising a driving unit for tilting the first movable unit based on an optical axis. According to claim 1,
The camera module wherein the mounting portion is tilted relative to the optical axis with respect to the support substrate. According to claim 1,
The driving unit includes a coil and a magnet for tilting the first movable unit based on the optical axis by electromagnetic interaction. According to claim 1,
The camera module in which the seating part contacts the first movable part. According to claim 1,
The camera module wherein the support member is coupled to the seating portion. According to claim 1,
The camera module of claim 1 , wherein the first movable part is tilted on an xy plane perpendicular to the optical axis. According to claim 6,
A camera module in which hand shake correction is performed by tilting the first movable unit. According to claim 3,
The magnet includes a plurality of magnets,
The coil includes a plurality of coils corresponding to the plurality of magnets. According to claim 8,
The plurality of magnets are arranged so as to be symmetrical to each other with respect to the center of the mounting portion. According to claim 1,
The tilt angle of the first movable part is 0.1 ° to 4 ° camera module. According to claim 1,
The first movable part includes a housing; and a bobbin disposed within the housing and moving in an optical axis direction. According to claim 1,
The support member includes a first support member disposed at a corner portion or a side portion of the seating portion. According to claim 12,
The support member includes a second support member disposed in a central portion of the seating portion. support substrate;
a first movable part disposed on the support substrate and movable in an optical axis direction;
a seating portion disposed below the first movable portion and in contact with the first movable portion;
a support member supporting the first movable part; and
A camera module comprising a driving unit for tilting the seating unit and the first movable unit based on an optical axis. According to claim 14,
The driving unit includes a coil and a magnet for tilting the first movable unit based on the optical axis by electromagnetic interaction. a first movable unit moving in the optical axis direction;
a support substrate disposed below the first movable part; and
A camera module comprising a support member including one end coupled to the first movable part and the other end coupled to the support substrate. According to any one of claims 1 to 16,
A camera module further comprising an image sensor.