KR102614747B1 - Lens driving unit and camera module including the same - Google Patents

Abstract

The embodiment includes a circuit board, a holder whose lower part is coupled to the upper surface of the circuit board, a filter coupled to the upper surface of the holder, an opening that communicates the inside of the holder formed by the holder, the filter, and the circuit board with the outside of the holder, and an opening. and a first adhesive for closure.

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 simply provides background information on the embodiments and does not constitute prior art.

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

In the case of camera modules mounted on small electronic products such as smartphones, the camera module may frequently receive shock during use, and the camera module may slightly shake due to the user's hand tremors during filming. In consideration of this, there has recently been a demand for the development of a technology for additionally installing a camera module to correct image stabilization.

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

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

Accordingly, the embodiment provides a lens driving device that can improve the problem of damage caused by shock due to movement of the lens barrel in the optical axis direction when autofocusing is performed or an external shock is applied, and a camera module including the same. There is a purpose.

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

A camera module according to an embodiment includes a circuit board; a holder whose lower part is coupled to the upper surface of the circuit board; a filter coupled to the upper surface of the holder; an opening that communicates 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.

Except for the opening, the inside of the holder and the outside of the holder may be sealed.

It may include a second adhesive disposed between the holder and the circuit board and adhering the holder and the circuit board. 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 upper surface of the circuit board and a second terminal disposed on a second side of the upper surface of the circuit board. The camera module may include a lens barrel disposed above the filter.

The holder may include a protrusion that protrudes upward along a side surface of the filter, and the filter may be located inside the protrusion. The protrusion may protrude from the upper surface of the holder. The top of the protrusion may be positioned higher than the top surface of the filter. The inner surface of the protrusion may be disposed opposite to the side surface of the filter and spaced apart from the side surface of the filter.

The filter has a rectangular shape, and the protrusion may have a shape in which linear members with a certain width along each side of the filter are combined with each other at the corners of the filter. The holder may include a hollow formed in the area where the filter is placed. The filter may be an infrared blocking filter.

The camera module includes 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 is formed on an edge of the holder located outside the protrusion, and the protrusion can block the second adhesive from flowing inside the holder and entering the filter.

Each of the first adhesive and the second adhesive may be formed of epoxy, thermosetting adhesive, or ultraviolet curing adhesive. The third adhesive may be formed of epoxy, thermosetting adhesive, or ultraviolet curing 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, the lower part of which is 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 formed by the holder, the filter, and the circuit board, open from the inside of the holder and communicating with the outside of the holder; And it may include a first adhesive that closes the opening.

In an embodiment, the protrusion blocks 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 impact due to direct contact.

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

The combination of the first holder and the second holder, which is provided with a recessed groove, an opening, and a filler, has the effect of allowing easy wet cleaning because the cleaning liquid does not penetrate into the interior.

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

Hereinafter, the embodiment will be described in detail with reference to the attached drawings. Since the embodiments can be subject to various changes and 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 should be understood to include all changes, equivalents, and substitutes included in the spirit and technical 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”, “second”, etc. may be used to describe various components, but the components 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 explaining the embodiment and do not limit the scope of the embodiment.

In the description of the embodiment, in the case where each element is described as being formed "on or under", ) includes two elements that are in direct contact with each other or one or more other elements that are formed (indirectly) between the two elements. Additionally, when expressed as “up” or “on or under,” it can include not only the upward direction but also the downward direction based on one element.

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

Additionally, a rectangular coordinate system (x, y, z) can be used in the drawing. In the drawing, the x-axis and y-axis refer to axes perpendicular to the optical axis. For convenience, the optical axis direction (z-axis direction) may be referred to as the first direction, the x-axis direction may be referred to as the second direction, and the y-axis direction may be referred to as the third direction.

1 is a perspective view showing a portion of a lens driving device according to an embodiment. Figure 2 is an exploded perspective view showing a part of a lens driving device according to an embodiment.

An image stabilization device applied to small camera modules of mobile devices such as smartphones or tablet PCs is used to prevent the outline of the captured image from being formed clearly due to vibration caused by the user's hand shaking when shooting still images. It means a configured device.

Additionally, the auto focusing device is a device that automatically focuses the image of the subject onto the image sensor (not shown). Such hand shake correction devices and auto focusing devices can be configured in various ways. In the embodiment, an optical module composed of a plurality of lenses is moved in a first direction or moved against a plane perpendicular to the first direction to prevent hand shake. Compensation operations and/or auto-focusing operations may be performed.

As shown in FIGS. 1 and 2, the lens driving device according to the embodiment may include a movable part. At this time, the movable part may perform the functions of auto-focusing and image stabilization of the lens. 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 the outer peripheral surface, and the first magnet 130 and the first coil It can be installed to move back and forth in the first direction in the inner space of the housing 140 by electromagnetic interaction between the housings 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 move in the first direction to perform an auto-focusing function.

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 together. can be combined with However, this is not limited, and the lens barrel 400 may be directly fixed to the inside of the bobbin 110 using a method other than screwing, without forming a thread on the inner peripheral surface of the bobbin 110.

Alternatively, it is possible for the one or more lenses to be formed integrally 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 composed of 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 amount of one-way current can be adjusted to increase or decrease the moving distance in one direction from the initial position.

A plurality of upper and lower support protrusions may be formed to protrude on the upper and lower surfaces of the bobbin 110. The upper support protrusion may be provided in a cylindrical or prismatic shape, and may couple and secure the upper elastic member 150. The lower support protrusion may be provided in a cylindrical or prismatic shape like the above-mentioned upper support protrusion, and may couple and secure the lower elastic member 160.

At this time, 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 supporting protrusions and the holes can be fixedly coupled to each other by an adhesive member such as heat fusion or epoxy.

The housing 140 has the shape of a hollow pillar supporting the first magnet 130 and may be formed in a substantially square shape. The first magnet 130 and the support member 220 may be combined and disposed on the side portion of the housing 140. Additionally, as described above, a bobbin 110 that is guided by the housing 140 and moves in the first direction may be disposed on the inner peripheral 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. It can flexibly support upward and/or downward motion in either direction. 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 plural pieces separated from each other. Through this multi-divided structure, each divided portion of the upper elastic member 150 can receive currents of different polarities or different power sources. Additionally, the lower elastic member 160 may also have a multi-segment structure and be electrically connected to the upper elastic member 150.

Meanwhile, the upper elastic member 150, lower elastic member 160, bobbin 110, and housing 140 may be assembled through heat fusion and/or bonding using an adhesive, etc.

The base 210 is disposed below the bobbin 110, can be provided in a substantially square shape, and can accommodate the printed circuit board 250.

A support groove of a corresponding size may be formed on the surface of the base 210 facing the portion where the terminal surface 253 of the printed circuit board 250 is formed. This support groove is formed to be concave inward at a certain depth from the outer peripheral surface of the base 210, so that the portion where the terminal surface 253 is formed can be prevented from protruding outward or the amount of protrusion can be adjusted.

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

Since the support members 220 according to the embodiment are each disposed on the outer surface of the corner of the housing 140, a total of four support members 220 can be installed symmetrically. Additionally, 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 of the upper elastic member 150 where a through hole is formed.

Additionally, 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 can be electrically connected through conductive adhesive, soldering, etc. Accordingly, the upper elastic member 150 can apply current to the first coil 120 through the electrically connected support member 220.

Meanwhile, in FIG. 2, the linear support member 220 is shown as an example, but the present invention is not limited thereto. That is, the support member 220 may be provided in the form of a plate-shaped member, etc.

The second coil 230 may perform hand shake 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 aspect of the embodiment, the housing 140 may move parallel to the x-axis and y-axis, but may also move slightly inclined to the x-axis and y-axis when moved while supported by the support member 220. there is.

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

The second coil 230 may be arranged to face the first magnet 130 fixed to the housing 140. In one embodiment, the second coil 230 may be disposed outside the first magnet 130. Alternatively, the second coil 230 may be installed below the first magnet 130 at a certain distance apart.

According to the embodiment, a total of four second coils 230 may be installed on the four sides of the circuit member 231, but this is not limited, and one for the second direction and one for the third direction. It is possible for only two, etc., to be installed, or four or more can be installed.

In the case of the embodiment, a circuit pattern in the shape of the second coil 230 may be formed on the circuit member 231, and additionally, a separate second coil may be disposed on the circuit member 231, but the present invention is not limited to this, and the circuit Instead of forming a circuit pattern in the shape of the second coil 230 on the member 231, only a separate second coil 230 may be disposed on the circuit member 231.

Alternatively, it is also possible to configure the second coil 230 by winding a wire in a donut shape, or by forming the second coil 230 in the form of an FP coil and electrically connecting it 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 on the upper side of the base 210. However, this is not limited, and the second coil 230 may be placed in close contact with the base 210, or may be placed at a certain distance apart, and may be formed on a separate board and attached to the printed circuit board 250. Laminated connections are also possible.

The printed circuit board 250 is electrically connected to at least one of the upper elastic member 150 and the lower elastic member 160 and is coupled to the upper surface of the base 210, as shown in FIG. 2. A through hole into which the support member 220 is inserted may be formed at a position corresponding to an 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, and external power can be applied to supply current to the first coil 120 and the second coil 230. The number of terminals formed on the terminal surface 253 may increase or decrease depending on the types of components that require control. Additionally, the printed circuit board 250 may be provided with 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 portion of the printed circuit board 250, etc., 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 damage, and in particular, the first magnet 130 and the first magnet 130 accommodated therein. Leakage of the electromagnetic fields generated by the first coil 120, the second coil 230, etc. to the outside can be limited and the electromagnetic fields can be focused.

Figure 3a is an exploded perspective view showing a part of a lens driving device according to an embodiment. Figure 3b is a side view showing a portion of the lens driving device in one 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 below the base 210, and a filter 610 can be mounted thereon. At this time, the lens barrel 400 may be mounted on the bobbin 110 so that it can move up and down in a first direction with respect to the first holder 600.

The filter 610 may serve to block light of a specific frequency band from light passing through the lens barrel 400 from entering the image sensor 810, which will be described later. At this time, it is appropriate for the filter 610 to be placed on the x-y plane.

Additionally, the filter 610 may be coupled to the upper surface of the first holder 600, and in one embodiment, the filter 610 may be an infrared blocking filter. Additionally, a hollow may be formed in the portion of the first holder 600 where the filter 610 is mounted so that light passing through the filter 610 can enter the image sensor 810.

The base 210 and the first holder 600 may be coupled to each other by a first adhesive portion 710. At this time, the adhesive forming the first adhesive portion 710 includes, for example, epoxy, thermosetting adhesive, and ultraviolet curing adhesive.

The adhesive forming the first adhesive portion 710 shown in FIG. 3A is, for example, applied to the adhesive portion of the base 210 or the first holder 600 to bond the base 210 and the first holder 600. ) are combined and then hardened, so that the base 210 and the first holder 600 can be fixed to each other.

At this time, the first adhesive portion 710 may serve to seal the inside of the lens driving device to prevent foreign substances from entering the lens driving device. Therefore, the first adhesive portion 710 needs to be sufficiently sealed when combining the base 210 and the first holder 600 using a sufficient amount of adhesive.

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

At this time, it is appropriate for the image sensor 810 to be placed on the x-y plane. In one embodiment, the image sensor 810 may be mounted on the top of the first holder 600.

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

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

As shown in FIG. 3B, the filter 610 and the image sensor 810 may be provided to face each other in a first direction. At this time, the filter 610 and the image sensor 810 may be provided at a certain distance apart in the first direction.

Figure 4 is a perspective view showing the first holder 600 according to one embodiment. Figure 5 is a cross-sectional view showing part A of Figure 4. As shown in FIG. 4, the first holder 600 may be provided with a protrusion 500.

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

Additionally, 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 hitting the filter 610 when the lens barrel 400 is mounted on a bobbin and moves up and down or moves downward in the first direction due to an external impact. This impact prevention structure will be described in detail below with reference to FIG. 7.

Additionally, the inner surface 500b of the protrusion 500 may be provided to face the side surface of the filter 610 and be spaced apart from each other. This is to ensure 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 impact the protrusion 500, this impact is prevented from being applied directly to the filter 610 through the protrusion 500 to prevent damage to the filter 610. , It is a structure to prevent damage, etc.

Meanwhile, referring again to FIG. 4, the filter 610 may be formed in a square shape when viewed in the first direction. At this time, since the filter 610 is transparent, it is joined to the first holder 600 with an adhesive at the edge of the generally octagonal hollow formed in the first holder 600, as shown in FIG. Likewise, a transparent octagonal area through which light passing through the lens barrel 400 penetrates may be formed.

Depending on the shape of the filter 610, the protrusion 500 is formed by, for example, linear members having a certain width along each side of the filter 610 when viewed in the first direction, joined to each other at the corners of the filter. can be formed.

At this time, the linear member protrudes from the upper surface of the first holder 600 and can be formed integrally with the first holder 600 through an injection molding manufacturing method. Additionally, the linear member may be bonded to the upper surface of the first holder 600 using a separate member using a method such as adhesive or heat fusion to form the protrusion 500.

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

As shown in FIGS. 6 and 7, the lower end of the lens barrel 400 may be arranged to extend to the bottom. This is an inevitable structure in order to reduce the overall height of the moving part, i.e. the first direction length, in accordance with the trend of miniaturization of lens driving devices, and to reduce the overall height of the camera module, i.e. the first direction length, in order to manufacture a high-pixel camera module. Because there is.

In order to manufacture the camera driving device and the camera module including the same, the lower end of the lens barrel 400, described below, can prevent collision with the filter 600 and damage to the filter 600 due to such collision. The formation of the protrusion 500 and the specific structure of the protrusion 500 are required.

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

As shown in FIG. 7, the lens barrel 400 is mounted on a bobbin and can move downward in a first direction, and can 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 broken or damaged due to an impact applied from the bottom of the lens barrel 400. As shown in FIG. 7, there is a protrusion 500 at the edge of the filter 610. ) exists to prevent direct contact between the lens barrel 400 and the filter 610.

As described above, the upper end 500a of the protrusion 500 may be located above the upper surface 610a of the filter 610 in the first direction, so 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, the inner surface 500b of the protrusion 500 is provided to face the side of the filter 610 and are spaced apart from each other, so that the protrusion 500 is connected to 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 an embodiment, the protrusion 500 blocks the lens barrel 400 or other parts of the lens driving device from directly contacting the filter 610 to prevent breakage or damage to the filter 610 due to impact from direct contact. It can be prevented. That is, by allowing the lower end of the lens barrel 400 to contact the protrusion 500 rather than the part where the filter 610 is coupled to the first holder 600, breakage or damage to the filter 610 can be prevented.

Meanwhile, as described above, the protrusion prevents the bottom of the lens barrel 400 from breaking or damaging the filter 610, thereby serving to improve 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, the distance in the second or third direction between the inner surfaces 500b of the protrusion 500, etc. are determined by the lens barrel. The filter 400 can be appropriately selected by considering the range of distance it moves in the second or third direction by performing hand shake correction, the mounting position or surface area of the filter 610, etc.

Meanwhile, as shown in FIG. 8, when the adhesive forming the first adhesive portion 710 is applied to the first holder 600, the protrusion 500 flows before the adhesive hardens to form 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 can block the adhesive from flowing into the filter 610. .

That is, in the embodiment, the protrusion 500 is formed by applying an adhesive forming the first adhesive portion 710 to the edge of the first holder 600 and flowing inside the first holder 600 to form the filter 610. It is possible to prevent contamination and damage to the filter 610 by adhesive by blocking the inflow into the filter.

Figure 9 is a plan view showing the first holder 600 according to one embodiment. Figure 10 is a plan view showing the second holder 800 according to one embodiment. Figure 11 is a plan view showing 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 depressed groove 620 is formed in a portion corresponding to the opening 721, which will be described later, when the first holder 600 and the second holder 800 are combined. You can.

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

At this time, the adhesive forming the second adhesive portion 720 may be, for example, epoxy, thermosetting adhesive, ultraviolet curing adhesive, etc., as in the case of forming the first adhesive portion 710.

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

Additionally, a plurality of terminals 820 may be formed on the side of the second holder 800, and the opening 721 may be disposed in a location other than the side where the terminals 820 are formed. This is to prevent contamination or damage to the terminal 820 by the filler 900 when the recessed groove 620 located at a position corresponding to the opening 721 is filled with the filler 900, which will be described later.

Meanwhile, the width w1 of the opening 721 may 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 that is opened by the opening 721 when filled with the filler 900.

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 separated from the adhesive during the curing process. Gas may be formed by vaporizing volatile substances.

When such 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, various elements, etc. of the first holder 600 or the second holder 800 Since it can contaminate and damage the gas, it is appropriate to discharge the gas to the outside.

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

That is, after the adhesive forming the first adhesive portion 710 is cured and the first holder 600 and the second holder 800 are combined, the recessed groove 620 is filled with the filler 900. The 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 portion 710 or the second adhesive portion 720, the adhesive may be, for example, epoxy, thermosetting adhesive, ultraviolet curing adhesive, etc. It 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 can be completely closed after the gas is discharged to the outside.

The combination of the first holder 600 and the second holder 800 of this structure may undergo a washing process. During the washing process, the lower surface of the first holder 600 and the upper surface of the second holder 800 are formed. Since the space is closed, 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 the cleaning liquid penetrates into the space and stays for a long period of time, causing the first holder to be damaged. It is possible to prevent the holder 600 and the second holder 800 from being contaminated or damaged.

In an embodiment, the combination of the first holder 600 and the second holder 800, which is provided with the recessed groove 620, the opening 721, and the filler 900, facilitates wet cleaning because the cleaning liquid does not penetrate into the assembly. There is an effect that can be taken forward.

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

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, image sensor 810, and printed circuit board 250 are as described above.

Additionally, the optical system may include at least one lens that transmits an image to the image sensor 810. At this time, an actuator module capable of performing an auto-focusing function and an image stabilization function may be installed in the optical system.

The actuator module that performs the auto-focusing function can be configured in various ways, and voice coil unit motors are commonly used. The lens driving device according to the above-described embodiment may function as an actuator module that performs an auto-focusing function or an image stabilization function.

Although only a few examples 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 can be combined in various forms unless they are incompatible technologies, and through this, can be implemented as a new embodiment.

210: base
400: Lens barrel
500: protrusion
600: 1st holder
610: filter
620: Recessed groove
710: First adhesive part
720: Second adhesive part
721: opening
800: Second holder
810: Image sensor
820: terminal
900: Filler

Claims (20)

circuit board;
a holder whose lower part is coupled to the upper surface of the circuit board;
a filter coupled to the upper surface of the holder; and
An opening is disposed between the holder and the circuit board, adheres the holder and the circuit board, and communicates the inside of the holder formed by the holder, the filter, and the circuit board with the outside of the holder. a second adhesive; and
comprising a first adhesive closing the opening,
The holder includes a hollow formed in the area where the filter is placed,
The holder includes a groove disposed at a position corresponding to the opening of the second adhesive in the optical axis direction,
The groove of the holder includes a first opening open from the upper surface of the holder and a second opening open to the lower surface of the holder,
The groove of the holder is spaced apart from the filter and does not overlap the filter in the optical axis direction,
A portion of the first adhesive is disposed in the groove of the holder and overlaps the first opening and the second opening of the groove of the holder in the optical axis direction. According to paragraph 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 paragraph 1,
Including an image sensor disposed on the circuit board,
A camera module in which the groove of the holder is not open to the inside of the holder. According to paragraph 3,
A camera module in which the filter and the image sensor are arranged to face each other in the optical axis direction. According to paragraph 4,
The circuit board includes a first terminal disposed on a first side of the upper surface of the circuit board and a second terminal disposed on a second side of the upper surface of the circuit board. According to paragraph 1,
A camera module including a lens barrel disposed above the filter. According to paragraph 1,
The holder includes a protrusion protruding upward along a side surface of the filter,
The filter is a camera module located inside the protrusion. In clause 7,
The protrusion is a camera module that protrudes from the upper surface of the holder. In clause 7,
A camera module where the top of the protrusion is located higher than the upper surface of the filter. In clause 7,
An inner surface of the protrusion is disposed opposite to the side surface of the filter and is spaced apart from the side surface of the filter. In clause 7,
The filter has a square shape,
The protrusion is a camera module in which linear members with a certain width along each side of the filter are combined with each other at corners of the filter. According to paragraph 1,
The filter is a camera module that is an infrared blocking filter. In clause 7,
a base disposed on the holder; and
A camera module comprising a third adhesive disposed between the base and the holder and coupling the base and the holder. According to clause 13,
The third adhesive is formed on an edge of the holder located outside the protrusion, and the protrusion blocks the third adhesive from flowing inside the holder and entering the filter. According to paragraph 3,
Each of the first adhesive and the second adhesive is formed of epoxy, thermosetting adhesive, or ultraviolet curing adhesive. According to clause 13,
The third adhesive is a camera module formed of epoxy, thermosetting adhesive, or ultraviolet curing adhesive. According to clause 5,
When viewed from above, the image sensor is a camera module disposed between the first terminal and the second terminal. According to paragraph 1,
A camera module in which the width of the groove is formed to be larger than the width of the opening of the second adhesive. delete delete