KR20220024337A - Lens driving unit and camera module including the same - Google Patents

Abstract

An embodiment of the present invention includes: a circuit board; a holder having a lower portion coupled to an upper surface of the circuit board; a filter which engages with the upper surface of the holder; an opening for communicating the inside of the holder formed by the holder, the filter, and the circuit board with the outside of the holder; and a first adhesive closing the opening. Therefore, it is possible to improve a problem of damage caused by an impact caused by the movement of a lens barrel in an optical axis direction.

Description

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 content described in this section merely provides background information for the embodiment and does not constitute the prior art.

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

In the case of a camera module mounted on a small electronic product such as a smartphone, the camera module may frequently be impacted during use, and the camera module may be slightly shaken according to a user's hand shake while shooting. In consideration of such a point, the development of a technique for additionally installing a camera module for image stabilization has been recently demanded.

Meanwhile, the camera module may include a lens barrel including at least one lens through which light is incident. When auto-focusing is performed or an external impact is applied, the lens barrel may move vertically in the optical axis direction.

In this process, the lens barrel may collide with the lens driving device and parts of the camera module including the lens driving device. In this case, there is a problem that the lens barrel and parts colliding therewith may be damaged.

Accordingly, the embodiment provides a lens driving device capable of improving the damage problem caused by the impact caused by the movement of the lens barrel in the optical axis direction when auto-focusing is performed or an external impact is applied, and a camera module including the same. There is a purpose.

The technical task to be achieved by the embodiment is not limited to the technical task mentioned above, and other technical tasks not mentioned will be clearly understood by those of ordinary skill in the art to which the embodiment belongs from the description below.

A camera module according to an embodiment includes a circuit board; a holder having a lower portion coupled to an upper surface of the circuit board; a filter coupled to the upper surface of the holder; an opening for communicating an inside of the holder formed by the holder, the filter, and the circuit board with an outside of the holder; and a first adhesive for closing the opening.

Except for the opening, the inner side of the holder and the outer side of the holder may be sealed.

A second adhesive disposed between the holder and the circuit board and bonding the holder and the circuit board may be included. The camera module may include an image sensor disposed on the circuit board.

The circuit board may include a first terminal disposed on a first side of the top surface of the circuit board and a second terminal disposed on a second side of the top surface of the circuit board. The camera module may include a lens barrel disposed above the filter.

The holder may include a protrusion protruding upward along a side surface of the filter, and the filter may be located inside the protrusion. The protrusion may protrude from an upper surface of the holder. An upper end of the protrusion may be positioned higher than an upper surface of the filter. An inner surface of the protrusion may be disposed to face the side surface of the filter, and may be spaced apart from the side surface of the filter.

The filter may have a rectangular shape, and the protrusion may have a shape in which linear members having a constant width along each side of the filter are coupled to each other at the edge of the filter. The holder may include a hollow formed in a portion where the filter is disposed. The filter may be an infrared cut filter.

The camera module may include a base disposed on the holder; and a third adhesive disposed between the base and the holder and coupling the base and the holder. The third adhesive may be formed on an edge of the holder positioned outside the protrusion, and the protrusion may block the second adhesive from flowing into the holder and flowing into the filter.

Each of the first adhesive and the second adhesive may be formed of an epoxy, a thermosetting adhesive, or an ultraviolet curable adhesive. The third adhesive may be formed of an epoxy, a thermosetting adhesive, or an ultraviolet curable adhesive.

When viewed from above, the image sensor may be disposed between the first terminal and the second terminal.

The holder may include a groove corresponding to the opening, and a portion of the first adhesive may be disposed in the groove of the holder.

A camera module according to another embodiment includes a circuit board; an image sensor disposed on the circuit board; a holder disposed on the circuit board and having a lower portion adhered to the upper surface of the circuit board; a filter coupled to the upper surface of the holder and facing the image sensor; an opening opening from the inside of the holder formed by the holder, the filter, and the circuit board and communicating with the outside of the holder; and a first adhesive for closing the opening.

In an embodiment, the protrusion may prevent the lens barrel or other parts of the lens driving device from directly contacting the filter, thereby preventing breakage or damage to the filter due to the impact caused by the direct contact.

In addition, the protrusion prevents contamination and damage of the filter by the adhesive by preventing the adhesive forming the first adhesive part from being applied to the edge of the first holder and flowing into the first holder and flowing into the filter. .

The combination of the first holder and the second holder provided with the recessed groove, the opening, and the filler has the effect that the cleaning solution does not penetrate therein, so that wet cleaning can be easily performed.

1 is a perspective view illustrating a part of a lens driving device according to an exemplary embodiment.
2 is an exploded perspective view illustrating a part of a lens driving device according to an exemplary embodiment.
3A is an exploded perspective view illustrating a part of a lens driving device according to an exemplary embodiment.
3B is a side view illustrating a part of a lens driving device according to an embodiment.
4 is a perspective view illustrating a first holder according to an embodiment.
5 is a cross-sectional view showing a portion A of FIG. 4 .
6 is a cross-sectional view illustrating a part of a lens driving device according to an exemplary embodiment.
7 is a cross-sectional view showing a portion B of FIG. 6 .
8 is a view for explaining the role of a protrusion formed in the first holder according to an embodiment.
9 is a plan view illustrating a first holder according to an embodiment.
10 is a plan view illustrating a second holder according to an embodiment.
11 is a plan view illustrating a state in which the first holder and the second holder are coupled according to an embodiment.

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

Terms such as “first” and “second” may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only 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 in "up (up)" or "below (on or under)" of each element, on (on or under) ) includes both elements in which two elements are in direct contact with each other or one or more other elements are disposed between the two elements indirectly. In addition, when expressed as “up (up)” or “down (on or under)”, the meaning of not only the upward direction but also the downward direction based on one element may be included.

Also, as used hereinafter, relational terms such as "upper/upper/above" and "lower/lower/below" etc. 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, a Cartesian coordinate system (x, y, z) may be used in the drawings. In the drawings, the x-axis and the y-axis mean axes perpendicular to the optical axis. For convenience, the optical axis direction (z-axis direction) may be referred to as a first direction, the x-axis direction may be referred to as a second direction, and the y-axis direction may be referred to as a third direction.

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

An image stabilization device applied to a small camera module of a mobile device such as a smartphone or tablet PC is designed to prevent the outline of the captured image from being clearly formed due to the vibration caused by the user's hand shake when shooting still images. means the device is configured.

In addition, the auto-focusing device is a device for automatically focusing the image of the subject on the surface of the image sensor (not shown). Such a hand-shake compensating device and an auto-focusing device can be configured in various ways. In the embodiment, the optical module composed of a plurality of lenses is moved in the first direction or by moving with respect to a plane perpendicular to the first direction. A correction operation and/or an auto-focusing operation may be performed.

1 and 2 , the lens driving device according to the embodiment may include a movable part. In this case, the movable unit may perform the functions of auto-focusing the lens and correcting hand shake. The movable part may include a bobbin 110 , a first coil 120 , a first magnet 130 , a housing 140 , an upper elastic member 150 , and a lower elastic member 160 .

The bobbin 110 is provided inside the housing 300, and a first coil 120 disposed inside the first magnet 130 is provided on an outer circumferential surface, and the first magnet 130 and the first coil are provided. It may be installed to be reciprocally movable in the first direction in the inner space of the housing 140 by the electromagnetic interaction between the 120 . A first coil 120 may be installed on the outer peripheral 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 can perform an auto-focusing function by moving in the first direction.

The bobbin 110 may include a lens barrel 400 in which at least one lens is installed. The lens barrel 400 can be coupled to the inside of the bobbin 110 in various ways.

For example, a female thread is formed on the inner peripheral surface of the bobbin 110, and a male thread corresponding to the thread is formed on the outer peripheral surface of the lens barrel 400, and the lens barrel 400 is connected to the bobbin 110 by screwing them. can be coupled to However, the present invention is not limited thereto, and the lens barrel 400 may be directly fixed to the inside of the bobbin 110 by a method other than screw coupling without forming a screw 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 the lens barrel 400 . However, in the embodiment, a lens driving device in which the lens barrel 400 is separately provided will be described.

The lens coupled to the lens barrel 400 may be configured as one sheet, or two or more lenses may be configured to 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 the initial position, and when a reverse current is applied, the bobbin 110 may move downward from the initial position. Alternatively, the movement distance in one direction from the initial position may be increased or decreased by adjusting the amount of current in one direction.

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 or prismatic shape like the upper support protrusion, 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 holes may be fixedly coupled to each other by thermal fusion or an adhesive member such as epoxy.

The housing 140 has a hollow column shape supporting the first magnet 130 , and may be formed in a substantially rectangular shape. The first magnet 130 and the support member 220 may be respectively coupled to the side portion of the housing 140 to be disposed. In addition, as described above, the bobbin 110 guided by the housing 140 and moving in the first direction may be disposed on the inner circumferential surface of the housing 140 .

The upper elastic member 150 and the lower elastic member 160 are coupled to the housing 140 and the bobbin 110 , and the upper elastic member 150 and the lower elastic member 160 are the first elastic members of the bobbin 110 . The upward and/or downward movement in the direction can be elastically supported. The upper elastic member 150 and the lower elastic member 160 may be provided as leaf springs.

As shown in FIG. 2 , the upper elastic member 150 may be provided in plurality separated from each other. Through such a multi-division structure, each of the divided portions of the upper elastic member 150 may receive currents having different polarities or different power sources. In addition, the lower elastic member 160 may also have a multi-division structure and may be electrically connected to the upper elastic member 150 .

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 or the like.

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

A support groove having a corresponding size may be formed on a surface of the base 210 facing the portion on which the terminal surface 253 is formed of the printed circuit board 250 . The support groove is formed to be concave inward to a predetermined depth from the outer circumferential surface of the base 210 , so that the portion where the terminal surface 253 is formed does not protrude to the outside or the amount of protrusion can be adjusted.

The support member 220 is disposed on the side surface of the housing 140 , the upper side is coupled to the housing 140 , and the lower side is coupled to the base 210 , and the bobbin 110 and the housing 140 are the It may be supported to be movable in a second direction and a third direction perpendicular to the first direction, and may be electrically connected to the first coil 120 .

Since the support members 220 according to the embodiment are respectively disposed on the outer surfaces of the corners of the housing 140, a total of four may be installed symmetrically. In addition, the support member 220 may be electrically connected to the upper elastic member 150 . That is, for example, the support member 220 may be electrically connected to a portion in which a through hole of the upper elastic member 150 is formed.

In addition, since the support member 220 is formed as a separate member from the upper elastic member 150 , the support member 220 and the upper elastic member 150 may be electrically connected to each other through a conductive adhesive, solder, or the like. Accordingly, the upper elastic member 150 may apply a current to the first coil 120 through the electrically connected support member 220 .

Meanwhile, although the linear support member 220 is illustrated in FIG. 2 as an embodiment, the present invention is not limited thereto. That is, the support member 220 may be provided in the form of a plate-shaped member or the like.

The second coil 230 may perform handshake correction by moving the housing 140 in the second and/or third directions through electromagnetic interaction with the first magnet 130 .

Here, the second and third directions may include directions substantially close to the x-axis and y-axis directions as well as the x-axis and y-axis directions. That is, from the driving side of the embodiment, the housing 140 may move in parallel to the x-axis and the y-axis, but also, when moving while being supported by the support member 220, it may move slightly inclined to the x-axis and the y-axis. there is.

Accordingly, the first magnet 130 needs to be installed at a position corresponding to the second coil 230 .

The second coil 230 may be disposed to face the first magnet 130 fixed to the housing 140 . In an embodiment, the second coil 230 may be disposed outside the first magnet 130 . Alternatively, the second coil 230 may be installed to be spaced apart from the lower side of the first magnet 130 by a predetermined distance.

According to an embodiment, a total of four second coils 230 may be installed on four sides of the circuit member 231 , but the present invention is not limited thereto. One for the second direction and one for the third direction. It is also possible that only two, such as a dog, may be installed, or four or more may be installed.

In the case of an embodiment, a circuit pattern is formed in the shape of the second coil 230 on the circuit member 231 , and an additionally separate second coil may be disposed on the circuit member 231 , but the present invention is not limited thereto. A separate second coil 230 may be disposed on the circuit member 231 without forming a circuit pattern in the shape of the second coil 230 on the member 231 .

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

The circuit member 231 including the second coil 230 may be installed on the upper surface of the printed circuit board 250 disposed above the base 210 . However, the present invention is not limited thereto, and the second coil 230 may be disposed in close contact with the base 210 , may be disposed spaced apart by a predetermined distance, and may be formed on a separate substrate to attach the second coil 230 to the printed circuit board 250 . It can also be laminated.

The printed circuit board 250 is electrically connected to at least one of the upper elastic member 150 and the lower elastic member 160, is coupled to the upper surface of the base 210, and as shown in FIG. 2 , the A through hole into which the support member 220 is inserted may be formed at a position corresponding to the end of the support member 220 .

A bent terminal surface 253 on which the terminal 251 is installed may be formed on the printed circuit board 250 . A plurality of terminals 251 are disposed on the terminal surface 253 to supply current to the first coil 120 and the second coil 230 by receiving external power. The number of terminals formed on the terminal surface 253 may be increased or decreased according to the types of components that need to be controlled. Also, the printed circuit board 250 may include one or three or more terminal surfaces 253 .

The cover member 300 may be provided in a substantially box shape, accommodate the above-described movable part, the second coil 230 , a part of the printed circuit board 250 , and the like, and may be coupled to the base 210 . The cover member 300 protects the movable part, the second coil 230, the printed circuit board 250, etc. accommodated therein from being damaged, and in particular, the first magnet 130, the first magnet accommodated therein. The electromagnetic field generated by the first coil 120 , the second coil 230 , etc. may be restricted from leaking to the outside so that the electromagnetic field is focused.

3A is an exploded perspective view illustrating a part of a lens driving device according to an exemplary embodiment. 3B is a side view illustrating a part of a lens driving device according to an embodiment.

The lens driving device of the embodiment may further include a first holder 600 and a second holder 800 . The first holder 600 is disposed under the base 210 , and the filter 610 may be mounted thereon. In this case, the lens barrel 400 may be mounted on the bobbin 110 to be vertically movable in the first direction with respect to the first holder 600 .

The filter 610 may serve to block light of a specific frequency band in light passing through the lens barrel 400 from being incident on the image sensor 810 to be described later. In this case, it is appropriate that the filter 610 is provided so as to be placed on the x-y plane.

In addition, the filter 610 may be coupled to the upper surface of the first holder 600 , and in an embodiment, the filter 610 may be an infrared cut-off filter. In addition, a hollow may be formed in a portion of the first holder 600 where the filter 610 is mounted so that the light passing through the filter 610 may be incident on the image sensor 810 .

The base 210 and the first holder 600 may be coupled to each other by a first adhesive part 710 . In this case, the adhesive forming the first adhesive part 710 includes, for example, an epoxy, a thermosetting adhesive, and an ultraviolet curable adhesive.

The adhesive forming the first adhesive part 710 shown in FIG. 3A is applied to, for example, an adhesive part of the base 210 or the first holder 600 to form the base 210 and the first holder 600 . ) is cured after being combined with each other, so that the base 210 and the first holder 600 may be fixed to each other.

In this case, the first adhesive portion 710 may serve to seal the lens so as not to introduce foreign substances into the lens driving device. Therefore, the first adhesive portion 710 needs to be sufficiently sealed when the base 210 and the first holder 600 are combined using a sufficient amount of adhesive.

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

In this case, it is appropriate that the image sensor 810 is provided to lie on the x-y plane. In an embodiment, the image sensor 810 may be mounted on the upper surface of the first holder 600 .

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

The second holder 800 may be coupled to the first holder 600 , and as in the case of the base 210 and the first holder 600 , the second holder 800 may be fixedly coupled to each other by bonding using an adhesive material. may be Meanwhile, the second holder 800 may be formed of a circuit board on which the image sensor 810 is mounted, as well as a circuit pattern on which various elements are coupled.

As shown in FIG. 3B , the filter 610 and the image sensor 810 may be provided to face each other in a first direction. In this case, the filter 610 and the image sensor 810 may be provided to be spaced apart from each other by a predetermined distance in the first direction.

4 is a perspective view showing the first holder 600 according to an embodiment. 5 is a cross-sectional view showing a portion A of FIG. 4 . As shown in FIG. 4 , the first holder 600 may include a protrusion 500 .

The protrusion 500 may serve to block the lower end of the lens barrel 400 from contacting the filter 610 at a portion where the filter 610 is mounted in the first holder 600 . In this case, the protrusion 500 may be formed to protrude in the first direction along the side surface of the filter 610 .

In addition, as shown in FIG. 5 , the upper end 500a of the protrusion 500 may be positioned above the upper surface 610a of the filter 610 in the first direction. This is to prevent the lower end of the lens barrel 400 from directly colliding with the filter 610 when the lens barrel 400 is mounted on the bobbin and moves vertically or downwardly in the first direction due to an external impact. Such an anti-impact structure will be described in detail below with reference to FIG. 7 .

In addition, the inner surface 500b of the protrusion 500 may be provided to face the side surface of the filter 610 and may be provided to be spaced apart from each other. This is to secure a processing tolerance for easily mounting the filter 610 inside the protrusion 500 of the first holder 600 .

In addition, when the lens barrel 400 or other parts of the lens driving device apply an impact to the protrusion 500 , such an impact is not directly applied to the filter 610 through the protrusion 500 to damage the filter 610 . , to prevent damage, etc.

Meanwhile, referring back to FIG. 4 , the filter 610 may be formed in a quadrangular shape when viewed in the first direction. At this time, since the filter 610 is transparent, it is coupled with the first holder 600 by an adhesive or the like at the edge portion of the generally octagonal hollow formed in the first holder 600, as shown in FIG. Similarly, a transparent octagonal portion through which the light passing through the lens barrel 400 passes may be formed.

According to the shape of the filter 610, the protrusion 500 is, for example, a linear member having a constant width along each side of the filter 610 when viewed in the first direction is coupled to each other at the edge of the filter. can be formed.

In this case, the linear member is formed to protrude from the upper surface of the first holder 600 and may be integrally formed with the first holder 600 through an injection molding manufacturing method or the like. In addition, the linear member may be bonded to the upper surface of the first holder 600 using a separate member by a method such as bonding or thermal fusion to form the protrusion 500 .

6 is a cross-sectional view illustrating a part of a lens driving device according to an exemplary embodiment. 7 is a cross-sectional view showing a portion B of FIG. 6 . 8 is a view for explaining the role of the protrusion 500 formed in the first holder 600 according to an embodiment.

6 and 7 , the lower end of the lens barrel 400 may be disposed to extend to the lower portion. This is an inevitable structure in order to reduce the overall height of the movable part, that is, the length in the first direction, according to the miniaturization trend of the lens driving device, and to reduce the overall height of the camera module, that is, the length in the first direction for manufacturing a high-pixel camera module. because there is

It is possible to prevent the lower end of the lens barrel 400 from collided with the filter 600 and damage to the filter 600 caused by the collision for manufacturing the camera driving device and the camera module including the same. The formation of the protrusion 500 and the specific structure of the protrusion 500 are required.

6 is a cross-sectional view illustrating a part of a lens driving device according to an exemplary embodiment. 7 is a cross-sectional view showing a portion B of FIG. 6 . 8 is a view for explaining the role of the protrusion 500 formed in the first holder 600 according to an embodiment.

As shown in FIG. 7 , the lens barrel 400 may be mounted on a bobbin and move downward in the first direction, and may also move downward due to an external impact. At this time, when the lens barrel 400 moves downward, the lower end of the lens barrel 400 may directly contact the filter 610 .

In this case, the filter 610 may be damaged or damaged by the impact applied from the lower end of the lens barrel 400 . As shown in FIG. 7 , a protrusion 500 is formed on the edge of the filter 610 . ) exists to prevent direct contact between the lens barrel 400 and the filter 610 .

As described above, since the upper end 500a of the protrusion 500 may be located above the upper surface 610a of the filter 610 in the first direction, when the lens barrel 400 descends, the lens barrel 400 ) The lower end collides with the upper end (500a) of the protrusion (500).

In addition, as described above, since the inner surface 500b of the protrusion 500 is provided to face the side surface of the filter 610 and is provided to be spaced apart from each other, the protrusion 500 is the lens barrel 400 or the lens. When it collides with other parts of the driving device, the impact applied to the protrusion 500 is not directly transmitted to the filter 610 .

In the embodiment, the protrusion 500 blocks the lens barrel 400 or other parts of the lens driving device from direct contact with the filter 610 to prevent damage or damage to the filter 610 due to impact caused by direct contact. can be prevented That is, by allowing the lower end of the lens barrel 400 to contact the protrusion 500 rather than the portion where the filter 610 is coupled in the first holder 600 , it is possible to prevent breakage and damage to the filter 610 .

On the other hand, as described above, the protrusion prevents the lower end of the lens barrel 400 from breaking or damaging the filter 610 , thereby improving the durability of the filter 610 .

At this time, the width in the second or third direction perpendicular to the first direction of the protrusion 500 and the distance in the second direction or the third direction between the inner surfaces 500b of the protrusion 500 are, It may be appropriately selected in consideration of the range of the distance 400 moves in the second or third direction by performing handshake correction, the mounting position or surface area of the filter 610 , and the like.

On the other hand, as shown in FIG. 8 , when the adhesive forming the first adhesive part 710 is applied to the first holder 600 , the protrusion 500 flows before the adhesive is cured to remove the filter 610 . It can play a role in preventing contamination and damage.

That is, before the adhesive is applied and cured, the adhesive may flow in the direction of the arrow shown in FIG. 8 , and the protrusion 500 formed by protruding in the first direction may block the adhesive from flowing into the filter 610 . .

That is, in the embodiment, in the protrusion 500 , the adhesive forming the first adhesive part 710 is applied to the edge portion of the first holder 600 and flows into the first holder 600 to the filter 610 . It is possible to prevent contamination and damage of the filter 610 by the adhesive by blocking the inflow to the .

9 is a plan view showing the first holder 600 according to an embodiment. 10 is a plan view showing the second holder 800 according to an embodiment. 11 is a plan view illustrating a state in which the first holder 600 and the second holder 800 are combined according to an embodiment.

As shown in FIG. 9 , a recessed groove 620 may be formed on one side of the first holder 600 . At this time, as shown in FIG. 11 , the recessed groove 620 is to be formed in a portion corresponding to an opening 721 to be described later when the first holder 600 and the second holder 800 are combined. can

Meanwhile, a second adhesive portion 720 for coupling the first holder 600 and the second holder 800 may be formed between the first holder 600 and the second holder 800 . The second adhesive portion 720 is formed by applying an adhesive, and the adhesive may be applied to the lower surface of the first holder 600 or the upper surface of the second holder 800, but in the embodiment, the second holder 800 An adhesive may be applied to the upper surface to form the second adhesive portion 720 .

In this case, as the adhesive forming the second adhesive part 720 , as in the case of forming the first adhesive part 710 , for example, an epoxy, a thermosetting adhesive, or an ultraviolet curable adhesive may be used.

An opening 721 that is a section on which an adhesive is not applied may be formed on one side of the second adhesive part 720 . As described above, the opening 721 may be provided at a position corresponding to the recessed groove 620 of the first holder 600 .

In addition, a plurality of terminals 820 may be formed on a side of the second holder 800 , and the opening 721 may be disposed on a portion other than the side where the terminal 820 is formed. This is to prevent contamination and damage to the terminal 820 by the filler 900 when the recessed groove 620 positioned at a position corresponding to the opening 721 is filled with a filler 900 to be described later.

Meanwhile, the width w1 of the opening 721 may be formed to be smaller than the width w2 of the recessed groove 620 . This is to completely close the space between the first holder 600 and the second holder 800 opened by the opening 721 when the filler 900 is filled.

An adhesive is applied to the upper surface of the second holder 800 to form a second adhesive portion 720, and after the first holder 600 and the second holder 800 are combined, the adhesive is cured from the adhesive. A gas in which the volatile material is vaporized may be formed.

When this gas remains in the space formed by the lower surface of the first holder 600 and the upper surface of the second holder 800, the circuit of the first holder 600 or the second holder 800, various devices, etc. Since it can contaminate and damage the gas, it is appropriate to discharge the gas to the outside.

Accordingly, this gas may be discharged from the space formed by the lower surface of the first holder 600 and the upper surface of the second holder 800 through the opening 721 . After curing of the adhesive forming the second adhesive part 720 is completed and the gas is completely discharged to the outside, the recessed groove 620 is filled with a filler 900 .

That is, after the adhesive forming the first adhesive part 710 is cured and the first holder 600 and the second holder 800 are combined, the recessed groove 620 is filled with a filler 900 , A space formed by the lower surface of the first holder 600 and the upper surface of the second holder 800 may be closed.

At this time, the filler 900 may be an adhesive, and as in the case of forming the first adhesive part 710 or the second adhesive part 720, the adhesive is, for example, epoxy, thermosetting adhesive, UV curable adhesive, etc. can be

Due to the above structure, the space formed by the lower surface of the first holder 600 and the upper surface of the second holder 800 may be closed after the gas is discharged to the outside.

The combination of the first holder 600 and the second holder 800 having such a structure may undergo a cleaning process, in which the lower surface of the first holder 600 and the upper surface of the second holder 800 are formed. Since the space is closed, there is an effect that wet cleaning using a cleaning solution is possible.

That is, when wet cleaning is performed, the space formed by the lower surface of the first holder 600 and the upper surface of the second holder 800 is closed, so that the cleaning liquid penetrates into the space and stays for a long time due to the first It is possible to prevent the holder 600 and the second holder 800 from being contaminated or damaged.

In the embodiment, the combination of the first holder 600 and the second holder 800 provided with the recessed groove 620, the opening 721 and the filler 900 does not penetrate the inside of the cleaning solution, so that wet cleaning is facilitated. It has the effect of moving forward.

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

The camera module according to the embodiment may include a lens barrel 400 coupled to the bobbin 110 , an image sensor 810 , a printed circuit board 250 , and an optical system. The lens barrel 400 , the image sensor 810 , and the printed circuit board 250 are the same as described above.

Also, the optical system may include at least one lens that transmits an image to the image sensor 810 . In this case, an actuator module capable of performing an auto-focusing function and a hand-shake correction function may be installed in the optical system.

The actuator module performing the auto-focusing function may be configured in various ways, and a voice coil unit motor is generally used. The lens driving apparatus according to the above-described embodiment may serve as an actuator module that performs an auto-focusing function or a hand-shake correction function.

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 may be implemented in a new embodiment through this.

210: base
400: lens barrel
500: protrusion
600: first holder
610: filter
620: recessed home
710: first adhesive
720: second adhesive
721: opening
800: second holder
810: image sensor
820: terminal
900: filler

Claims (20)

circuit board;
a holder having a lower portion coupled to an upper surface of the circuit board;
a filter coupled to the upper surface of the holder;
an opening for communicating an inside of the holder formed by the holder, the filter, and the circuit board with an outside of the holder; and
A camera module including a first adhesive for closing the opening. According to claim 1,
A camera module in which the inside of the holder and the outside of the holder are sealed except for the opening According to claim 1,
and a second adhesive disposed between the holder and the circuit board and bonding the holder and the circuit board. According to claim 1,
A camera module including an image sensor disposed on the circuit board. 5. The method of claim 4,
wherein the circuit board includes a first terminal disposed on a first side of the top surface of the circuit board and a second terminal disposed on a second side of the top surface of the circuit board. According to claim 1,
A camera module including a lens barrel disposed on the upper side of the filter. According to claim 1,
The holder includes a protrusion protruding upward along the side surface of the filter,
The filter is a camera module located inside the protrusion. 8. The method of claim 7,
The protrusion is a camera module protruding from the upper surface of the holder. 8. The method of claim 7,
The upper end of the protrusion is located higher than the upper surface of the filter camera module. 8. The method of claim 7,
The inner surface of the protrusion is disposed opposite to the side surface of the filter, and the camera module is spaced apart from the side surface of the filter. 8. The method of claim 7,
The filter has a rectangular shape,
The protrusion is a camera module having a shape in which a linear member having a constant width along each side of the filter is coupled to each other at a corner portion of the filter. According to claim 1,
The holder includes a hollow formed in a portion where the filter is disposed,
The filter is an infrared cut-off filter camera module. 8. The method of claim 7,
a base disposed on the holder; and
and a third adhesive disposed between the base and the holder and coupling the base and the holder. 14. The method of claim 13,
The third adhesive is formed on an edge of the holder located outside the protrusion, and the protrusion blocks the second adhesive from flowing into the holder and flowing into the filter. 4. The method of claim 3,
Each of the first adhesive and the second adhesive is a camera module formed of an epoxy, a thermosetting adhesive, or an ultraviolet curable adhesive. 14. The method of claim 13,
The third adhesive is a camera module formed of an epoxy, a thermosetting adhesive, or an ultraviolet curable adhesive. 6. The method of claim 5,
When viewed from above, the image sensor is disposed between the first terminal and the second terminal. According to claim 1,
The holder includes a groove corresponding to the opening,
A part of the first adhesive is disposed within the groove of the holder. circuit board;
an image sensor disposed on the circuit board;
a holder disposed on the circuit board and having a lower portion adhered to the upper surface of the circuit board;
a filter coupled to the upper surface of the holder and facing the image sensor;
an opening opening from the inside of the holder formed by the holder, the filter, and the circuit board and communicating with the outside of the holder; and
A camera module including a first adhesive for closing the opening. circuit board;
a holder disposed on the circuit board;
a filter disposed on the holder; and
and a first adhesive part disposed between the holder and the circuit board.

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