KR20170027018A - Lens moving apparatus and camera module including the same - Google Patents

Abstract

The present invention relates to a lens operating device, comprising: a cover member equipped with a hollow yoke on an upper portion thereof; a bobbin installed inside the cover member, and configured to be movable in a first direction; a first coil arranged outside the bobbin; a first magnet configured to face the first coil in the cover member; a first circuit board installed under the bobbin, electrically connected to the first coil; a second circuit board having at least a part attached to the cover member, electrically connected to the first circuit board; and a damping portion having one side coupled to the bobbin. As such, the present invention may decrease vibrations generated by optic-axial movement of a bobbin, and prevents or restrains a resultant mechanical resonance.

Description

[0001] The present invention relates to a lens driving apparatus and a camera module including the lens driving apparatus.

An embodiment relates to a lens driving apparatus and a camera module including the lens driving apparatus.

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

In recent years, IT products such as mobile phones, smart phones, tablet PCs, and notebooks, which incorporate ultra-compact digital cameras, are actively under development.

In the case of an IT product in which a conventional miniature digital camera is incorporated, an image sensor for converting external light into a digital image or a digital image and a lens driving unit for adjusting the distance between the lenses and aligning the focal distance of the lens are incorporated.

2. Description of the Related Art Generally, a lens driving apparatus included in a miniature digital camera has a function of generating a sharpest image on an image sensor based on the sharpness of a digital image formed on the image sensor according to the distance between the lens and the image sensor, And to execute a control process of finding a point.

When such auto focusing is performed, the bobbin on which the lens is mounted moves in the optical axis direction, and vibration occurs in the bobbin when the bobbin moves in the optical axis direction.

When the frequency of the bobbin moving in the optical axis direction approaches or approaches the natural frequency of the bobbin and the housing, a resonance phenomenon occurs in the bobbin, the housing, and the like. As a result, the life of the lens driving device is reduced, There has been a problem that the bobbin, the housing, and other parts are damaged.

Therefore, the embodiment relates to a lens driving device having a structure capable of attenuating vibration caused by movement of the bobbin in the optical axis direction, and preventing or suppressing mechanical resonance due to such vibration, and a camera module including the same.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

One embodiment of the lens driving device includes a cover member having a hollow yoke at an upper portion thereof; A bobbin provided inside the cover member and movable in a first direction; A first coil disposed outside the bobbin; A first magnet disposed on the cover member so as to face the first coil; A first circuit board provided below the bobbin and electrically connected to the first coil; A second circuit board at least partially attached to the cover member, the second circuit board being electrically connected to the first circuit board; And a damping portion having one side coupled to the bobbin.

The damping unit may be made of a flexible material.

The adhesive may be formed of an ultraviolet ray hardenable material.

The damping unit may include a first damping unit having one side coupled to the bobbin and the other side coupled to the yoke.

The first damping portion may be provided in a plurality of symmetrical directions with respect to the center of the cover member.

The first damping portion may be disposed radially with respect to the center of the cover member.

The damping portion may include a second damping portion having one side coupled to the bobbin and the other side coupled to the lower portion of the cover member.

The second damping unit may include a plurality of second damping units, and the second damping units may be spaced apart from each other by a predetermined distance.

The damping unit may include a third damping unit having one side coupled to the bobbin and the other side coupled to the first circuit board.

The plurality of third damping units may be provided, and the third damping units may be spaced apart from each other along a side surface of the first circuit board.

The damping unit may include a fourth damping unit having one side coupled to the bobbin and the other side coupled to the second circuit board.

The plurality of fourth damping portions may be provided, and each of the fourth damping portions may be spaced apart from each other along the surface of the second circuit board.

The first circuit board or the second circuit board may be a flexible circuit board.

Another embodiment of the lens driving device includes a cover member having a hollow yoke at an upper portion thereof; A bobbin provided inside the cover member and movable in a first direction; A first coil wound on an outer circumferential surface of the bobbin; A first magnet disposed on the cover member so as to face the first coil; A first circuit board provided below the bobbin and electrically connected to the first coil; A second circuit board at least partially attached to the cover member, the second circuit board being electrically connected to the first circuit board; And a fifth damping unit having one side coupled to the cover member and the other side coupled to the first circuit board.

One embodiment of the camera module comprises: an image sensor; And the lens driving device.

In an embodiment, the damping portion including the first damping portion to the fifth damping portion may attenuate the vibration of the bobbin upon execution of autofocusing.

Therefore, the lens driving apparatus of the embodiment can prevent or suppress the occurrence of the mechanical resonance phenomenon due to the vibration generated when the auto focusing is performed.

It is possible to prevent damage or breakage of each component of the lens driving device due to the mechanical resonance due to prevention or suppression of the mechanical resonance phenomenon.

1 is a perspective view showing a lens driving apparatus according to an embodiment.
2 is an exploded perspective view showing a lens driving apparatus according to an embodiment.
3 is a perspective view showing a state in which a cover member is removed from a lens driving apparatus according to an embodiment.
Fig. 4 is a plan view of Fig. 3. Fig.
5 is a cross-sectional view showing a lens driving apparatus according to an embodiment.
6 is a cross-sectional view showing part A of Fig.
7 is a plan view showing a position of a first damping portion according to an embodiment.
8 is a plan view showing the position of the first damping portion according to another embodiment.
9 is a plan view showing the position of the first damping portion according to another embodiment.
10 is a bottom view illustrating the position of a second damping portion according to one embodiment.
11 is a view showing a portion B in Fig.
12 is a bottom perspective view illustrating the position of a third damping unit according to an embodiment.
13 is a view showing a portion C in Fig.
14 is a bottom view showing the position of the fourth damping portion according to an embodiment.
Fig. 15 is a view showing part D in Fig.
16 is a bottom view illustrating the position of a fifth damping portion according to an embodiment.
Fig. 17 is a view showing part E of Fig. 16. Fig.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. The embodiments are to be considered in all aspects as illustrative and not restrictive, and the invention is not limited thereto. It is to be understood, however, that the embodiments are not intended to be limited to the particular forms disclosed, but are to include all modifications, equivalents, and alternatives falling within the spirit and scope of the embodiments. The sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience.

The terms "first "," second ", and the like can be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. In addition, terms specifically defined in consideration of the constitution and operation of the embodiment are only intended to illustrate the embodiments and do not limit the scope of the embodiments.

In the description of the embodiments, when it is described as being formed on the "upper" or "on or under" of each element, the upper or lower (on or under Quot; includes both that the two elements are in direct contact with each other or that one or more other elements are indirectly formed between the two elements. Also, when expressed as "on" or "on or under", it may include not only an upward direction but also a downward direction with respect to one element.

It is also to be understood that the terms "top / top / top" and "bottom / bottom / bottom", as used below, do not necessarily imply nor imply any physical or logical relationship or order between such entities or elements, But may be used only to distinguish one entity or element from another entity or element.

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

1 is a perspective view showing a lens driving apparatus according to an embodiment. 2 is an exploded perspective view showing a lens driving apparatus according to an embodiment.

The lens driving apparatus illustrated in FIGS. 1 and 2 may include a mover 100, a cover member 200, a first magnet 500, and a base 700. The cover member 200 may be coupled to the base 700 and the underside of the cover member 200 may be supported by the base 700. [

In addition, the cover member 200 may be formed in a hollow shape, and a yoke 210 may be integrally formed on the hollow inner peripheral surface to shield the magnetic field. At this time, the cover member 200 may be formed of a ferromagnetic material such as iron.

In addition, the cover member 200 may have an outer shape when viewed from above, and may have a circular inner shape so as to cover the bobbin 150, but the embodiments are not limited thereto.

At this time, the cover member 200 may be provided in a quadrangular shape having rounded corners as shown in FIG. 1, or may be provided in an octagonal shape, as shown in FIG.

When the first magnet 500 disposed at the corner of the cover member 200 has a trapezoidal shape when viewed in the first direction, the magnetic field leaking from the corner of the cover member 200 to the outside can be minimized.

In the embodiment, the yoke 210, which shields the magnetic field and limits external leakage of the magnetic field, is integrally formed with the cover member on the upper inner circumferential surface of the cover member. At this time, the cover member 200 mainly shields the magnetic field leaking from the upper surface and the outer surface of the cover member 200, and the yoke 210 can mainly shield the magnetic field leaking toward the inner circumferential surface.

In the embodiment, the yoke 210 is circular in cross section in the first direction, but may be formed in a polygonal shape. The winding ring 180 and the first coil 190 may have a circular or polygonal cross section corresponding to the shape of the circular or polygonal shape of the yoke 210.

The first magnet 500 is opposed to the first coil 190 on the cover member and serves to drive the mover 100. At this time, the first magnet 500 may be fixed directly to the cover member 200.

When the first magnet 500 is directly fixed to the cover member 200, the first magnet 500 may be directly fixed to the side or edge of the cover member 200 with an adhesive or the like.

When the cover member 200 is made of metal, it is effective to shield the magnetic field if the surface of the cover member 200 that is in contact with the first magnet 500 is large. In addition, at least two surfaces of the first magnet 500 can contact the cover member 200.

For example, when the first magnet 500 has a trapezoidal shape in a first direction, the first magnet 500 may contact the inner surface of the cover member 200 by at least three sides.

Also, in the embodiment, the first magnets 500 are provided in two and are disposed at two corners of the cover member 200, respectively. And may be disposed on four inner sides of the cover member 200. [

Meanwhile, the mover 100 may include a bobbin 150, a winding ring 180, and a first coil 190. At this time, the bobbin 150 is provided inside the cover member 200 and can be installed to be reciprocally movable in the first direction in the inner space of the cover member 200.

The bobbin 150 may be coupled to the outer circumferential surface of the bobbin 150 such that the bobbin 150 can be electromagnetically interacted with the first magnet 500 and the first coil 190 may be wound or coupled .

The bobbin 150 may be coupled with a lens barrel (not shown) in which at least one lens is installed, and the lens barrel may be formed to be screwable inside the bobbin 150.

Although not shown, it is also possible that the lens barrel is directly fixed to the inside of the bobbin 150 by a method other than screwing, or one or more lenses may be integrally formed with the bobbin 150 without a lens barrel . The lens may be composed of a single sheet, or two or more lenses may be configured to form an optical system.

Meanwhile, the first magnet 500 and the winding ring 180 may be spaced apart from each other by a predetermined distance. According to such a configuration, it is possible to prevent the winding ring 180 and / or the first coil 190 from contacting or interfering with the first magnet 500 even when the bobbin 150 is raised and lowered in the first direction So that the bobbin 150 can move smoothly.

Such a separation distance may be formed in a second direction and a third direction perpendicular to the first direction. That is, even when the bobbin 150 moves in the first direction, the winding ring 180 always needs to be separated from the first magnet 500 by a predetermined distance or more.

Meanwhile, the winding ring 180 may be coupled to the bobbin 150, and the first coil 190 may be wound on the outer circumferential surface of the winding ring 180 to have a ring shape. At this time, the first coil 190 may be coupled to the outer circumferential surface of the winding ring by, for example, an adhesive.

The bobbin 150 and the winding ring 180 may be integrally formed by insert injection or the like and the bobbin 150 and the winding ring 180 may be integrally formed with each other, The ring 180 may be detachably attached to the bobbin 150.

In addition, although the winding ring 180 according to the above-described embodiment may include a material having magnetism, the embodiment is not limited to the kind of the material of the winding ring 180. That is, according to another embodiment, the winding ring 180 may be made of a non-magnetic material.

According to the embodiment, the winding ring 180 may have the same planar shape as the bobbin 150. As shown in FIG. 2, each of the winding ring 180 and the bobbin 150 may have, for example, an annular planar shape, although embodiments are not limited in this respect.

That is, each of the bobbin 150 and the winding ring 180 may have various planar shapes, for example, a polygonal planar shape. Alternatively, the planar shape of the bobbin 150 and the planar shape of the winding ring 180 may be different from each other.

The shape of the winding ring 180 in which the first coil 190 is wound can be changed so that the surface of the first coil 190 facing the first magnet 500 has a desired curvature.

The first coil 190 is disposed outside the bobbin 150 and may be disposed at a position corresponding to the first magnet 500. Although the first coil 190 is shown as having a circular planar shape in the case of the embodiment, according to another embodiment, the first coil 190 may have an angular shape other than circular, for example, have.

At this time, since the first coil 190 is wound on the winding ring 180, the plane shape of the winding ring 180 and the plane shape of the first coil 190 can be the same.

For example, the first coil 190 may be a round wire / round wire shaped wire-wound coil, the material may be a copper wire, aluminum wire, or a composite wire of copper and aluminum, but the embodiments are not limited thereto. Further, the outer surface of the coil may be formed of an insulating material.

The first coil 190 and the first magnet 500 may have the same curvatures on opposite surfaces, but the embodiments are not limited thereto. This is to consider the electromagnetic action of the first magnet 500 disposed opposite to the first magnet 500. When the corresponding surface of the first magnet 500 is flat and the surface of the first coil 190 facing the first magnet 500 is flat, It is because.

However, the present invention is not limited to this, and depending on the design specifications, the surfaces of the first magnet 500 and the first coil 190 may be all curved surfaces, all planar, or one curved surface and one planar surface .

The first circuit board 600 is provided on the lower side of the mover 100 and is electrically connected to the first coil 190. The first circuit board 600 is electrically connected to the first coil 190, A flexible circuit board made of a flexible material can be provided.

For example, the first circuit board 600 may be provided below the bobbin 150. That is, one end of the first circuit board may be coupled to the lower portion of the bobbin, and the other end of the first circuit board may be coupled to the second circuit board.

Also, like the general lens driving device, unlike the embodiment, the first coil 190 is electrically connected to the first coil 190 to supply electric power, and the first direction movement of the bobbin 150 is resiliently or elastically (Not shown) provided at the upper portion and / or the lower portion of the bobbin 150 by a supporting device.

In the embodiment, the first coil 190 is electrically connected to the first circuit board 600 to supply electric power. The bobbin 150 moves in the first direction through the displacement sensing unit 300 And an external control driver (not shown) connected thereto is controlled.

Therefore, in the embodiment, since the elastic member used in a general lens driving apparatus is not used, the structure of the lens driving apparatus can be simplified.

10, one end of the first circuit board 600 is coupled to the lower portion of the bobbin 150, and the other end of the first circuit board 600 is coupled to the upper portion of the base 700. Referring to FIG. In one embodiment, the first circuit board 600 is coupled to a protrusion formed on the lower end of the bobbin 150, and the other end of the first circuit board 600 is coupled to the base 700 by soldering or bonding. have.

The first circuit board 600 may be disposed between the bobbin 150 and the base 700 in a second direction and / or a third direction perpendicular to the first direction.

When the bobbin 150 moves in the first direction, for example, when the bobbin 150 moves upward, the first circuit board 600 coupled with the bobbin 150 is moved upward, 150 are also lowered.

On the other hand, in the embodiment, the vibration generated by the elastic member and the mechanical resonance phenomenon caused thereby can be avoided by replacing the upper and lower elastic members with the first circuit board 600, and the noise generated by the elastic members, There is an effect that can be reduced.

In addition, according to the embodiment, the upper and lower elastic members, the housing, and the first magnet used in the general lens driving apparatus can be eliminated, thereby reducing cost and simplifying the process in the lens driving apparatus. It is effective. Also, the first magnet may be composed of four.

The first circuit board 600 may further include a second circuit board 610 attached to one side of the base 700 and / or the cover member 200 and electrically connected to the first circuit board 600 . The second circuit board 610 electrically connects the first circuit board 600 and the external control driver.

At this time, the second circuit board 610 may be formed of a flexible circuit board of a flexible material similar to the first circuit board 600, but may be formed of a rigid material. The second circuit board 610 may be formed of a flexible material or a solid material in consideration of the structure of the entire lens driving apparatus, the easiness of manufacturing the second circuit board 610, the manufacturing cost, and the like.

The displacement sensing unit 300 may sense the displacement of the bobbin 150 in the first direction and may include a second magnet 310 and a first sensor 320.

The second magnet 310 is coupled to and installed in the bobbin 150 of the mover 100 and the first sensor 320 is disposed inside the cover member 200 and is located at a position corresponding to the second magnet 310 And the second magnet 310 is spaced apart from the second magnet 310 by a predetermined distance.

The first sensor 320 may be a displacement sensing unit 300 for determining a displacement value of the bobbin 150 in the first direction together with a second magnet 310 installed on the bobbin 150 . For this, the first sensor 320 is disposed at a position corresponding to the position of the second magnet 310.

The first sensor 320 may be a sensor for sensing a change in magnetic force emitted from the second magnet 310 of the bobbin 150. Also, the first sensor 320 may be a Hall sensor.

However, the present embodiment is not limited to the Hall sensor, and any sensor that can detect a change in magnetic force can be used, and a sensor capable of detecting a position in addition to the magnetic force is also possible. For example, It is also possible to use a reflector or the like.

A second circuit board 610 electrically connected to the first coil 190 through the first circuit board 600 and an image sensor are mounted on the outside of the lens driving device, Respectively. According to this connection method, the movement of the bobbin 150 in the first direction is controlled by the control driver in a feedback or closed loop manner.

The movement of the bobbin 150 in the first direction is for auto focusing, that is, for automatically focusing the image of the object on the image sensor surface. The feedback control by the control driver for autofocusing is performed as follows.

The control driver receives the first displacement value of the bobbin 150 measured by the displacement detector 300 and the image of the object imaged on the image sensor and determines whether the focus of the object is appropriate.

When the focus of the subject is not appropriate, the amount of current supplied to the bobbin 150 is changed to move the bobbin 150 in the first direction, and the control driver again receives the first direction displacement value and the image of the subject, Is appropriate.

By repeating this process, the control driver finds the proper focus of the subject. As a result, the control driver repeatedly adjusts the first direction displacement value of the bobbin 150 to perform autofocusing, and this process proceeds in a feedback control manner as described above.

Meanwhile, the camera module including the lens driving device may include a cover member 200, a bobbin 150, a lens barrel, a first circuit board 600, an image sensor, and a printed circuit board.

The cover member 200 is formed in a hollow shape, and as described above, the yoke 210 that shields the magnetic field can be integrally formed. The bobbin 150 may be provided inside the cover member and movable in a first direction by an electromagnetic interaction.

The lens barrel may be coupled to the inside of the bobbin, and the coupling method may be threaded or other various combinations as described above. The first circuit board 600 is provided below the bobbin 150 and is electrically connected to the first coil 190 coupled to the bobbin 150 as described above.

The image sensor is provided at a lower portion of the base 700, and an image of an object incident through the lens barrel is imaged. The printed circuit board is electrically connected to the image sensor, and image information of the object acquired from the image sensor can be received.

The embodiment uses a closed loop control method instead of the open loop control using the upper and lower elastic members in a general lens driving apparatus, so that the auto focusing can be performed accurately and quickly. In addition, since the upper side spring is not used in the embodiment, the height adjustment of the upper surface of the bobbin 150 is relatively free, so that the bonding operation is facilitated when the lens or the lens barrel is assembled to the bobbin 150.

In addition, since the embodiment has a structure in which the winding ring 180 is coupled to the bobbin 150 and the first coil 190 is wound on the winding ring 180, the heat or tension generated when the first coil 190 is wound It is possible to remarkably reduce deformation of the bobbin 150 due to the rotation of the lens barrel.

3 is a perspective view showing a state in which a cover member is removed from a lens driving apparatus according to an embodiment. Fig. 4 is a plan view of Fig. 3. Fig.

As shown in FIGS. 3 and 4, for example, the first magnet 500 may be provided at least one distance apart from the second magnet 310 by a certain distance in the circumferential direction of the winding ring 180 have.

In an embodiment, the cover member 200 may have a rectangular shape in side view in the first direction, and the first sensor 320 may be provided at any one corner of the cover member 200.

At least one of the first magnet 500 may be provided inside the cover member 200 at the corners except the corner where the first sensor 320 is provided and the opposite corner.

In one embodiment, the first magnet 500 is disposed on both sides of the corners where the second magnet 310 and the first sensor 320 are provided in the receiving space formed by the cover member 200 and the yoke 10 And may be provided in a pair so that they are opposed to each other at the corner where they are located.

At this time, the first magnet 500 may be formed in a trapezoidal shape corresponding to the corner of the accommodation space, but not limited thereto, and may be formed in a polygonal shape such as a triangular shape. This trapezoidal shape may also minimize magnetic field leakage from the corners of the cover member 200 to the outside.

The arrangement structure of the first magnet 500, the second magnet 310 and the first sensor 320 in the accommodation space is an optimized arrangement structure considering the shape of the accommodation space of the embodiment. However, the first magnet 500, the second magnet 310, the first sensor 320, and the like may be disposed in the accommodating space in a different manner, not limited to the above arrangement.

For example, the first magnet 500 may be arranged in a total of four or eight such that the first magnet 500 is opposed to the corner of the accommodation space, and the shape of the first magnet 500 is not a trapezoid, It may have a cubic shape. In addition, such an arrangement structure may also be varied depending on the shapes of the cover member 200 and the yoke 210. [

On the other hand, a damping portion can be formed in the lens driving device of the embodiment. The damping unit may serve to attenuate the vibration of the bobbin 150 in the lens driving apparatus, for example, during auto focusing.

For example, the damping portion may have one side coupled to the bobbin 150 and the other side coupled to the cover member 200. [ 5 and 6, the first damping portion 2100 to the fourth damping portion 2400 are shown as examples in the former case, and the fifth damping portion 2500 is shown as an example in the latter case. Hereinafter, each of the damping units will be described in detail with reference to the drawings.

Meanwhile, the damping unit may be formed of a flexible material. Therefore, even when the object to which the damping unit is coupled is the movable parts such as the bobbin 150 and the first circuit board 600, the damping unit can be extended or contracted, so that the movable parts can be smoothly .

In addition, the damping portion may be formed of, for example, an ultraviolet ray hardening adhesive, so that the damping portion can be easily formed at various portions of the lens driving device.

5 is a cross-sectional view showing a lens driving apparatus according to an embodiment. 6 is a cross-sectional view showing part A of Fig. The damping portion may include a first damping portion 2100. 5 and 6, the first damping portion 2100 may be coupled to the bobbin 150 at one side and coupled to the yoke 210 at the other side.

That is, in order for the bobbin 150 and the yoke 210 to move up and down in the first direction without being disturbed by the yoke 210, And may be spaced apart in the third direction.

The first damping portion 2100 may be formed in a gap formed between the bobbin 150 and the yoke 210. As described above, the damping portion may be formed of an adhesive. However, since the adhesive is formed of a flexible material even when cured, even if the damping portion is coupled to the bobbin 150 and the yoke 210, So that it does not interfere with the first direction movement of the light guide plate 150.

If the cross-sectional area of the first damping portion 2100 is larger than the cross-sectional area of the first damping portion 2100, the damping effect may be increased. However, even if the first damping portion 2100 is formed of a flexible material, It can be an obstacle to movement.

That is, the greater the cross-sectional area of the bonding portion of the first damping portion 2100, the greater the force required to move the bobbin 150, which means that a larger amount of current must be applied to the first coil 190 do. Therefore, it is appropriate to appropriately select the cross-sectional area of the joint portion of the first damping portion 2100 in consideration of the damping effect and the force required to move the bobbin 150.

Meanwhile, the first damping parts 2100 may be provided symmetrically with respect to the center of the cover member 200. When the first damping portion 2100 is provided asymmetrically with respect to the center of the cover member 200, the first damping portion 2100 prevents the bobbin 150 from moving unnecessarily when the bobbin 150 moves in the first direction. ) May occur, and such tilt may degrade the performance of the lens driving apparatus.

Hereinafter, embodiments of the structure in which the first damping portions 2100 are symmetrical with respect to the center of the cover member 200 will be described with reference to FIGS. 7 and 8. FIG. 7 is a plan view showing the position of the first damping portion 2100 according to an embodiment. 8 is a plan view showing the position of the first damping portion 2100 according to another embodiment.

7 and 8, the bobbin 150 and the yoke 210, which correspond to the centers of two opposing sides of the cover member 200 having a quadrangular outer shape as viewed in the first direction, A pair of first damping portions 2100 symmetrical to each other can be formed.

On the other hand, when the lens driving device is viewed in the first direction as a whole, the gap between the bobbin 150 and the yoke 210 is so small that it is difficult to see the first damping portion 2100. Therefore, only the positions where the first damping parts 2100 are formed are shown in FIGS. 7 and 8 for the sake of convenience. This is also the case in Fig.

7, a pair of first damping portions 2100 facing each other in the up and down direction are formed on the paper, and a virtual line (not shown) that can be drawn across the center of the cover member 200 in the left- The pair of first damping portions 2100 are symmetrical with respect to each other.

8, a pair of first damping portions 2100 facing each other in the left-right direction are formed on the ground, and a virtual line (not shown in the figure) that can be drawn so as to pass through the center of the cover member 200 in the up- The pair of first damping parts 2100 are symmetrical with respect to each other.

9 is a plan view showing the position of the first damping portion 2100 according to another embodiment. As shown in FIG. 9, the first damping portion 2100 may be disposed radially with respect to the center of the cover member 200, for example.

That is, the first damping portion 2100 may be disposed radially in a plurality of gaps between the bobbin 150 and the yoke 210 with respect to the center of the cover member 200. In FIG. 9, the arrangement of the first damping portion 2100 of FIG. 7 and FIG. 8 is shown as a combination.

However, the present invention is not limited to this, and the first damping portion 2100 may be disposed radially with respect to the center of the cover member 200 at various positions and numbers.

However, if the number of the first damping parts 2100 is increased, the damping effect may increase. On the other hand, if the number of the first damping parts 2100 is excessively increased, Excessive force may be required to move in one direction.

9, it is appropriate to appropriately select the number of the first damping portions 2100 in consideration of the damping effect and the force required to move the bobbin 150. In the embodiment shown in FIG.

10 is a bottom view illustrating the position of the second damping portion 2200 according to one embodiment. 11 is a view showing a portion B in Fig. The damping portion may include a second damping portion 2200.

As shown in FIGS. 10 and 11, the second damping portion 2200 may be formed so that one side of the second damping portion 2200 is coupled to the bobbin 150, and the other side of the second damping portion 2200 is coupled to the lower portion of the cover member 200. 10 and 11, the second damping portion 2200 is formed in a gap between the bobbin 150 and the cover member 200 located on the right side of the paper.

10, the second damping portion 2200 may be formed in a gap between the bobbin 150 located on the upper side of the paper and the cover member 200. In addition, as shown in FIG. The second damping portion 2200 may be formed in a gap between the bobbin 150 and the cover member 200 located on the right side and the upper side of the paper.

At this time, only one second damping unit 2200 may be formed, but a plurality of second damping units 2200 may be formed. When a plurality of second damping portions 2200 are formed, the respective second damping portions 2200 may be spaced apart from each other by a predetermined distance.

In another embodiment, when the second damping portions 2200 are formed in plural numbers, the distance between the second damping portions 2200 may not be the same. That is, each of the second damping units 2200 may be spaced apart from each other by a predetermined distance.

The damping effect of the second damping portion 2200 can be increased as the cross-sectional area of the adhesive portion is increased and the number of the adhesive portions is increased. However, if the cross-sectional area of the bonding portion of the second damping portion 2200 is excessively large or excessively large, even if the second damping portion 2200 is formed of a flexible material, Excessive force may be required.

Therefore, in the embodiment shown in Figs. 10 and 11, the cross-sectional area and / or the number of the bonded portions of the second damping portion 2200 are appropriately determined in consideration of the damping effect and the force required to move the bobbin 150 It is reasonable to choose.

12 is a bottom perspective view illustrating the position of the third damping portion 2300 according to an embodiment. 13 is a view showing a portion C in Fig. The damping unit may include a third damping unit 2300.

As shown in FIGS. 12 and 13, the third damping unit 2300 may have one side coupled to the bobbin 150 and the other side coupled to the first circuit board 600. The third damping portion 2300 may be formed at a stepped portion formed between the bobbin 150 and the first circuit board 600. [

That is, the first circuit board 600 is provided below the bobbin 150 and a part of the first circuit board 600 contacts the lower surface of the bobbin 150, so that the lower surface of the bobbin 150 and the first circuit board 600, And a side surface of the first circuit board 600 may form a stepped surface.

Therefore, the third damping portion 2300 may be formed by bonding a part of the third damping portion 2300 to the side surface of the first circuit board 600 forming a stepped surface with the lower surface of the bobbin 150, respectively.

At this time, only one third damping unit 2300 may be formed, but a plurality of third damping units 2300 may be formed. 12, when a plurality of third damping portions 2300 are formed, the respective third damping portions 2300 are spaced apart from each other along the side surface of the first circuit board 600 .

In another embodiment, when the third damping portions 2300 are formed in plural, the distance between the third damping portions 2300 may not be the same. That is, each of the third damping parts 2300 may be spaced apart from each other along the side surface of the first circuit board 600.

The damping effect of the third damping portion 2300 may increase as the cross-sectional area of the adhesive portion increases, and as the number increases. However, if the cross-sectional area of the third damping portion 2300 is excessively large or excessively large, even if the third damping portion 2300 is formed of a flexible material, Excessive force may be required.

12 and 13, the cross-sectional area and / or the number of the bonded portions of the third damping portion 2300 are appropriately determined in consideration of the damping effect and the force required to move the bobbin 150 It is reasonable to choose.

14 is a bottom view showing the position of the fourth damping portion 2400 according to an embodiment. Fig. 15 is a view showing part D in Fig. The damping unit may include a fourth damping unit 2400.

As shown in FIGS. 14 and 15, the fourth damping unit 2400 may be provided such that one side thereof is coupled to the bobbin 150, and the other side thereof is coupled to the second circuit board 610. That is, there is a gap between the surfaces of the bobbin 150 and the second circuit substrate 610 facing each other, and the fourth damping portion 2400 may be formed in the gap.

At this time, only one fourth damping unit 2400 may be formed, but a plurality of the fourth damping units 2400 may be formed. 14 and 15, when a plurality of fourth damping portions 2400 are formed, each of the fourth damping portions 2400 is fixed to the second circuit board 610 along the surface of the second circuit board 610 Spaced apart.

In another embodiment, when the fourth damping portions 2400 are formed in plural, the fourth damping portions 2400 may not be spaced apart from each other. That is, each of the fourth damping portions 2400 may be spaced apart from each other along the surface of the second circuit board 610 at a predetermined interval.

The damping effect of the fourth damping portion 2400 may be increased as the cross-sectional area of the bonding portion is increased and the number of the bonding portions is increased. However, if the cross-sectional area of the bonded portion of the fourth damping portion 2400 is excessively large or excessively large, even if the fourth damping portion 2400 is formed of a flexible material, Excessive force may be required.

Therefore, in the embodiment shown in Figs. 14 and 15, the cross-sectional area and / or the number of the bonded portions of the fourth damping portion 2400 are appropriately determined in consideration of the damping effect and the force necessary for moving the bobbin 150 It is reasonable to choose.

16 is a bottom view showing the position of the fifth damping portion 2500 according to an embodiment. Fig. 17 is a view showing part E of Fig. 16. Fig. The damping unit may include a fifth damping unit 2500.

As shown in FIGS. 16 and 17, the fifth damping unit 2500 may be provided such that one side of the fifth damping unit 2500 is coupled to the cover member 200, and the other side of the fifth damping unit 2500 is coupled to the first circuit board 600. That is, there is a gap between the inner surface of the cover member 200 and the side surface of the first circuit board 600 facing the inner surface of the cover member 200, and the fifth damping portion 2500 can be formed in the gap.

At this time, only one of the fifth damping units 2500 may be formed, but a plurality of the fifth damping units 2500 may be formed. 16 and 17, when a plurality of fifth damping portions 2500 are formed, each of the fifth damping portions 2500 is fixed along the side surface of the first circuit board 600 Spaced apart.

In another embodiment, when the fifth damping portions 2500 are formed in plural, the distance between the fifth damping portions 2500 may not be the same. That is, each of the fifth damping units 2500 may be spaced apart from each other along the side surface of the first circuit board 600.

The damping effect of the fifth damping portion 2500 may be increased as the cross-sectional area of the bonding portion is increased and the number of the bonding portions is increased. However, if the cross-sectional area of the bonding portion of the fifth damping portion 2500 is excessively large or excessively large, even if the fifth damping portion 2500 is formed of a flexible material, Excessive force may be required.

That is, even if the fifth damping unit 2500 and the first circuit board 600 are formed of a flexible material, if the cross-sectional area of the adhesive portion of the fifth damping unit 2500 is excessively large or excessively large, The fifth damping portion 2500 may limit the tensile, shrinkage, or other deformation of the first circuit board 600, and thus excessive force may be applied to the deformation of the first circuit board 600, This excessive force is due to the force applied to the bobbin 150 in the first direction.

Therefore, in the embodiment shown in Figs. 16 and 17, the cross-sectional area and / or the number of the bonding portions of the fifth damping portion 2500 are appropriately determined in consideration of the damping effect and the force required to move the bobbin 150 It is reasonable to choose.

The first damping unit 2100 to the fifth damping unit 2500 may be provided alone or in part or in whole of the lens driving apparatus.

In an embodiment, the damping portion including the first damping portion 2100 to the fifth damping portion 2500 may attenuate the vibration of the bobbin 150 when the autofocusing is performed.

Therefore, the lens driving apparatus of the embodiment can prevent or suppress the occurrence of the mechanical resonance phenomenon due to the vibration generated when the auto focusing is performed.

It is possible to prevent damage or breakage of each component of the lens driving device due to the mechanical resonance due to prevention or suppression of the mechanical resonance phenomenon.

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

The camera module according to the embodiment may include a lens barrel and an image sensor (not shown) coupled to the bobbin 150. At this time, the lens barrel may include at least one lens that transmits an image to the image sensor.

In addition, the camera module may further include an infrared cut filter (not shown). The infrared cut filter serves to block the infrared light from entering the image sensor.

In this case, in the base 700 illustrated in FIG. 2, an infrared cutoff filter may be provided at a position corresponding to the image sensor, and may be coupled to a holder member (not shown). Further, the holder member can support the lower side of the base 700.

The base 700 may be provided with a separate terminal member for energizing the external power source, or may be formed integrally with a surface electrode or the like.

Meanwhile, the base 700 may function as a sensor holder for protecting the image sensor. In this case, a protrusion may be formed downward along the side surface of the base 700. However, this is not essential, and although not shown, a separate sensor holder may be disposed below the base 700 to perform its role.

While only a few have been described above with respect to the embodiments, various other forms of implementation are possible. The technical contents of the embodiments described above may be combined in various forms other than the mutually incompatible technologies, and may be implemented in a new embodiment through the same.

150: Bobbin
180: winding ring
190: first coil
200: cover member
210: York
300: Displacement sensing unit
310: second magnet
320: first sensor
500: first magnet
600: first circuit board
610: second circuit board
700: Base
2100: first damping portion
2200: second damping portion
2300: third damping portion
2400: fourth damping portion
2500: fifth damping portion

Claims (15)

A cover member having a hollow yoke at an upper portion thereof;
A bobbin provided inside the cover member and movable in a first direction;
A first coil disposed outside the bobbin;
A first magnet disposed on the cover member so as to face the first coil;
A first circuit board provided below the bobbin and electrically connected to the first coil;
A second circuit board at least partially attached to the cover member, the second circuit board being electrically connected to the first circuit board; And
And a damping portion
And the lens driving device. The method according to claim 1,
Wherein the damping portion is made of a flexible material. 3. The method of claim 2,
Wherein the adhesive is formed of an ultraviolet ray hardenable material. The method according to claim 1,
Wherein the damping unit comprises:
And a first damping unit having one side coupled to the bobbin and the other side coupled to the yoke. 5. The method of claim 4,
Wherein the first damping portion comprises:
And a plurality of lens units symmetrical with respect to a center of the cover member. 6. The method of claim 5,
Wherein the first damping portion comprises:
Wherein the cover member is disposed radially with respect to a center of the cover member. The method according to claim 1,
Wherein the damping unit comprises:
And a second damping portion having one side coupled to the bobbin and the other side coupled to the lower portion of the cover member. 8. The method of claim 7,
Wherein the plurality of second damping units are provided, and each of the second damping units is spaced apart from each other by a predetermined distance. The method according to claim 1,
Wherein the damping unit includes a third damping unit having one side coupled to the bobbin and the other side coupled to the first circuit board. 10. The method of claim 9,
Wherein the plurality of third damping units are provided, and each of the third damping units is spaced apart from each other along a side surface of the first circuit board. The method according to claim 1,
Wherein the damping unit includes a fourth damping unit having one side coupled to the bobbin and the other side coupled to the second circuit board. 12. The method of claim 11,
Wherein the plurality of fourth damping portions are provided, and each of the fourth damping portions is spaced apart from one another along a surface of the second circuit board. The method according to claim 1,
Wherein the first circuit board or the second circuit board is provided as a flexible circuit board. A cover member having a hollow yoke at an upper portion thereof;
A bobbin provided inside the cover member and movable in a first direction;
A first coil wound on an outer circumferential surface of the bobbin;
A first magnet disposed on the cover member so as to face the first coil;
A first circuit board provided below the bobbin and electrically connected to the first coil;
A second circuit board at least partially attached to the cover member, the second circuit board being electrically connected to the first circuit board; And
And a second damping portion, one side of which is coupled to the cover member and the other side of which is coupled to the first circuit board,
And the lens driving device. Image sensor; And
A camera module comprising the lens driving device according to any one of claims 1 to 21.

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