KR20220132518A - Camera module and mobile device including the same - Google Patents

Abstract

A camera module of an embodiment, which can improve a breakage problem generated due to an impact by movement perpendicular to an optical axis of a lens barrel during image stabilization, comprises: a base having a first hollow portion; a circuit board disposed on the base and having a second hollow portion; a circuit member disposed on the circuit board and having a second coil including a third hollow portion; and a lens barrel disposed on the base. At least a portion of the lens barrel passes the first to third hollow portions, and the base comprises a blocking unit protruding from an upper surface thereof and inserted into the second hollow portion of the circuit board and the third hollow portion of the circuit member. At least a portion of the blocking unit is overlapped with the lens barrel in a perpendicular direction to an optical axis direction.

Description

Camera module {CAMERA MODULE AND MOBILE DEVICE INCLUDING THE SAME}

The embodiment relates to a camera module and a mobile device 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 be frequently 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 an image stabilization means to a camera module has recently been demanded.

Meanwhile, the camera module may include a lens barrel including at least one lens through which light is incident. When hand shake correction is performed, the lens barrel may move along a plane perpendicular to the optical axis.

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 camera module and a mobile device including the same, which can improve the damage problem caused by the impact caused by the movement in the direction perpendicular to the optical axis of the lens barrel when performing handshake correction.

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 base including a first hollow; a circuit board disposed on the base and including a second hollow; a circuit member disposed on the circuit board, the circuit member including a third hollow and forming a second coil; and a lens barrel disposed on the base, wherein at least a portion of the lens barrel passes through the first to third hollows, the base protrudes from an upper surface and the second hollow of the circuit board and the circuit member and a blocking portion inserted into the third hollow of the block, wherein at least a portion of the blocking portion overlaps the lens barrel in a direction perpendicular to the optical axis direction.

An inner circumferential surface of at least a portion of the blocking part may overlap an outer circumferential surface of the lens barrel in a direction perpendicular to the optical axis direction. A lowermost portion of the lens barrel may be located below the first to third hollows.

The blocking part may protrude in the optical axis direction along a circumferential direction of the first hollow end of the base. The upper end of the blocking part may be located above the lower end of the lens barrel in the optical axis direction. The blocking part may pass through the second hollow and the third hollow.

The camera module may include an image sensor disposed to face the lens barrel in the optical axis direction.

The blocking part may be formed in a circular ring shape as viewed in the optical axis direction along the first hollow end of the base. A height of the outer peripheral surface of the blocking part may be greater than a thickness of the circuit board in the optical axis direction. An uppermost end of the blocking part may be positioned higher than an upper surface of the circuit member.

The camera module may include a housing disposed on the circuit member; and a bobbin disposed in the housing and coupled to the lens barrel. In addition, the camera module may include a magnet disposed in the housing; and a first coil disposed on the bobbin and configured to move the bobbin in an optical axis direction by interaction with the magnet. In addition, the camera module may include a holder disposed under the base; and an infrared cut-off filter disposed on the holder to face the image sensor in the optical axis direction. In addition, the camera module may include an upper elastic member coupled to an upper portion of the bobbin and an upper portion of the housing; and a support member electrically connecting the upper elastic member and the circuit board, wherein the housing may move in a direction perpendicular to the optical axis direction by interaction between the second coil and the magnet.

The circuit board may include a terminal surface bent from an upper surface and a plurality of terminals formed on the terminal surface.

A camera module according to another embodiment includes a base including a first hollow; a first circuit board disposed on the base and including a second hollow; a circuit member disposed on the first circuit board and including a third hollow, in which a second coil is formed; a lens barrel disposed on the base; and an image sensor facing the lens barrel in an optical axis direction, wherein the base includes a blocking portion protruding from an upper surface and inserted into the second hollow and the third hollow, and an inner circumferential surface of the blocking portion is perpendicular to the optical axis direction It faces the lower portion of the outer peripheral surface of the lens barrel in one direction.

The blocking part may be formed to protrude in the optical axis direction along a circumferential direction of the first hollow end of the base. The blocking part may pass through the second hollow and the third hollow, and an upper end of the blocking part may be positioned higher than an upper surface of the circuit member.

The camera module according to another embodiment may include an infrared cut-off filter disposed between the lens barrel and the image sensor.

A mobile device according to an embodiment may include the camera module according to any one of the above-described embodiments.

In an embodiment, the blocking unit may serve to block the second coil or the printed circuit board from directly contacting the lens barrel and colliding with each other. Accordingly, the blocking unit has an effect of preventing the occurrence of breakage and cracking of the second coil, the printed circuit board, and the lens barrel due to the impact. Accordingly, the embodiment may increase the durability of the second coil, the printed circuit board, and the lens barrel.

In addition, the embodiment can prevent particles generated due to breakage or cracking of the second coil, the printed circuit board, and the lens barrel from contaminating and damaging the inside of the lens driving device.

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.
3 is a perspective view illustrating a base according to an embodiment.
4 is a perspective view illustrating a state in which a base and a printed circuit board are combined according to an embodiment.
5 is a cross-sectional view illustrating a part of a lens driving device according to an exemplary embodiment.
6 is an enlarged view showing a portion A of FIG. 5 .
7 is an exploded perspective view illustrating a part of a lens driving device according to an exemplary embodiment.
8 is a diagram illustrating a part of a lens driving device according to an exemplary embodiment.
9 is a side view illustrating a state in which some components are omitted from FIG. 8 .

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 the specific disclosed form, and it should be understood to include all changes, equivalents, or 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 on "up (above)" or "below (below)" (on or under) of each element, above (above) or below (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)", it may include not only the upward direction but also the meaning of the downward direction based on one element.

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.

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 image sensor surface. 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 is moved in a plane perpendicular to the first direction to achieve such hand-shake. A correction operation and/or an auto-focusing operation may be performed.

1 and 2 , the lens driving apparatus 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. The electromagnetic interaction between the 120 may be installed to be reciprocally movable in the first direction in the inner space of the housing 140 . 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 screwed into the bobbin 110. 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 methods 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, the upper elastic member 150 may have a through hole corresponding to the upper support protrusion, and the lower elastic member 160 may have a through hole corresponding to the lower supporting protrusion. 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. Also, as described above, a 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 of 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 to each other. 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 example, 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. have.

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, and 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 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. Without 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, the second coil 230 may be formed by winding the 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 from the base 210 , 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. In addition, 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.

Meanwhile, hollows 211 , 252 , and 232 may be formed in the base 210 , the printed circuit board 250 , and the second coil 230 , respectively. The lens barrel 400 and the filter 610 or the image sensor 810 to be described later may be provided to face each other through the respective hollows 211, 252, and 232, and the lens barrel 400 may be provided to face each other. The light may pass through the filter 610 to form an image on the image sensor 810 .

In addition, a lower end of the lens barrel 400 may be disposed in the lens driving device by passing through each of the hollows 211 , 252 , and 232 .

3 is a perspective view showing the base 210 according to an embodiment. 4 is a perspective view showing a state in which the base 210 and the printed circuit board 250 are combined according to an embodiment.

As shown in FIG. 3 , the base 210 may include a blocking part 500 . At this time, the blocking part 500 serves to block the respective hollow ends of the printed circuit board 250 and/or the second coil 230 and the lower side of the lens barrel 400 from contacting each other. can do.

The blocking part 500 may be provided to protrude in the first direction along the circumferential direction of the end 211a of the hollow 211 of the base 210 as shown in FIG. 3 as an embodiment. That is, the blocking part 500 may be provided in a circular ring shape when viewed in the first direction along the end 211a of the hollow 211 of the base 210 .

However, the present invention is not limited thereto, and although not shown, in another embodiment, it is formed in an arc shape as viewed in the first direction along the end 211a of the hollow 211 of the base 210, and may be provided in plurality.

On the other hand, as shown in FIG. 4 , when the printed circuit board 250 is disposed on the upper side of the base 210 , the blocking part 500 passes through the hollow 252 of the printed circuit board 250 . A printed circuit board 250 may be seated on the base 210 .

In addition, although not shown, when the second coil 230 is disposed on the upper side of the printed circuit board 250 , the blocking part 500 is inserted into the hollow 232 of the second coil 230 and the second coil 230 is inserted into the second coil 230 . Two coils 230 may be seated on the printed circuit board 250 .

5 is a cross-sectional view illustrating a part of a lens driving device according to an exemplary embodiment. 6 is an enlarged view showing a portion A of FIG. 5 .

5 and 6 , the lower end of the lens barrel 400 may be extended to the lower portion. This is an inevitable structure 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

A blocking unit capable of preventing the lower end of the lens barrel 400 from collided with the second coil 230 or the printed circuit board 250 to be described below for the manufacture of the camera driving device and the camera module including the same The formation of 500 and the specific structure of the blocking part 500 are required.

As shown in FIG. 5 , the upper end 500a of the blocking part 500 may be located above the lower end 400a of the lens barrel 400 in the first direction. Due to this structure, the outer peripheral surface 400b of the lens barrel 400 is provided to face the inner peripheral surface 500b of the blocking part 500 from the lower part.

Therefore, when the lens driving device performs the hand-shake correction function, even if the lens barrel 400 moves in the second or third direction perpendicular to the first direction, the lens barrel 400 is the blocking part 500 . may be in direct contact with, but the second coil 230, the hollow 232, the end 232a, or the printed circuit board 250 existing outside the outer circumferential surface 500c of the blocking part 500 in the second or third direction. ) can not directly contact the hollow 252 end (252a).

As described above, the blocking unit 500 serves to block direct contact with the second coil 230 or the printed circuit board 250 when the lens barrel 400 moves in the second or third direction. can do.

When the lens barrel 400 moves in the second direction or the third direction and the second coil 230 or the printed circuit board 250 directly collides, the second coil 230 or the printed circuit board 250 is subjected to impact. Accordingly, a part of the lens barrel 400 , the second coil 230 , and the printed circuit board 250 may be damaged or abrasion may occur.

In addition, when the second coil 230 or the printed circuit board 250 is formed to have a very thin thickness in the first direction, an impact is applied to the second coil 230 , the printed circuit board 250 , and a part of the lens barrel 400 . Since it may be concentrated locally, the above-mentioned breakage and cracking phenomenon may occur more conspicuously.

Accordingly, the blocking unit 500 may serve to block the second coil 230 or the printed circuit board 250 from directly contacting the lens barrel 400 and colliding with each other. Accordingly, the blocking unit 500 has an effect of preventing the occurrence of breakage and cracking of the second coil 230 , the printed circuit board 250 , and the lens barrel 400 due to the impact.

The blocking part 500 may be provided such that an inner circumferential surface 500b overlaps at least a portion of the lens barrel 400 outer circumferential surface 400b in a second direction and a third direction perpendicular to the first direction.

As the overlapping portion h1 is longer in the first direction, the contact area between the inner peripheral surface 500b of the blocking part 500 and the outer peripheral surface 400b of the lens barrel 400 increases, so that the lens barrel 400 is damaged and cracked. may be advantageous to prevent

Since there is a limit to increasing the overlapping portion h1 when the lens driving device is small, the length of the overlapping portion h1 is determined in consideration of the lens barrel 400 height h2, the size of the lens driving device, and other design conditions. You need to choose appropriately.

For example, when the height h2 of the lens barrel 400 is 4 mm to 6 mm in the first direction, the overlapping portion h1 may be provided to be 0.3 mm to 0.8 mm in the first direction. In this case, the height h2 of the lens barrel 400 may be a length measured in the first direction from the upper surface of the image sensor 810 to the top of the lens barrel as shown in FIG. 9 .

The height h3 of the outer peripheral surface 500c of the blocking part 500 may be greater than the thickness h4 of the printed circuit board 250 , that is, a thickness measured in the first direction.

As shown in FIG. 6 , a second coil 230 is formed in a portion where a height corresponding to the difference between the height h3 of the outer peripheral surface 500c of the blocking part 500 and the thickness h4 of the printed circuit board 250 is formed. It may be seated and coupled to the printed circuit board 250 .

Therefore, when the height h3 of the outer peripheral surface 500c of the blocking part 500 is greater than the thickness h4 of the printed circuit board 250, the hollow 232 end 232a of the second coil 230 is formed by the blocking part ( 500), direct contact with the outer peripheral surface 400b of the lens barrel 400 can be avoided.

As described above, the outer circumferential surface 500c of the blocking part 500 includes at least a portion of the hollow 252 end 252a of the printed circuit board 250 and the hollow 232 end 232a of the second coil 230 and They may be provided at opposite heights.

That is, the height h3 of the outer peripheral surface 500c of the blocking part 500 may be formed smaller than the combined height of the printed circuit board 250 and the second coil 230 , but at least the thickness of the printed circuit board 250 . It is appropriate to form larger than (h4).

If, the height h3 of the outer peripheral surface 500c of the blocking part 500 is smaller than the thickness h4 of the printed circuit board 250, the hollow 232 end 232a of the second coil 230 is Since all of them are provided to directly face the outer circumferential surface 400b of the lens barrel 400, the hollow 232 end 232a of the second coil 230 and the outer circumferential surface 400b of the lens barrel 400 are connected to the blocking part ( 500) because they can directly contact and impact each other without being blocked.

As a result, the height h3 of the outer peripheral surface 500c of the blocking part 500 is greater than the thickness h4 of the printed circuit board 250, and the height h3 of the outer peripheral surface 500c of the blocking part 500 and the printed circuit board 250 are formed. The hollow 232 end 232a of the second coil 230 at the portion of the outer peripheral surface 500c of the blocking portion 500 corresponding to the difference in the thickness h4 of the circuit board 250 is the blocking portion 500 . It may be in contact with the outer peripheral surface (500c).

Accordingly, the second coil 230 is blocked from direct contact with the lens barrel 400 by the blocking unit 500 , so that the second coil 230 or the lens barrel 400 are in direct contact or collide with each other. damage to the second coil 230 or the lens barrel 400 can be prevented.

7 is an exploded perspective view illustrating a part of a lens driving device according to an exemplary embodiment. 8 is a side view illustrating a part of a lens driving device according to an exemplary embodiment. FIG. 9 is a view showing a state in which some components are omitted from FIG. 8 .

The lens driving apparatus 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.

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. At this time, 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 one 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 an adhesive 700 . In this case, the adhesive 700 used is, for example, an epoxy, a thermosetting adhesive, an ultraviolet curable adhesive, or the like.

The adhesive 700 shown in FIG. 7 is applied to, for example, an adhesive portion of the base 210 or the first holder 600, and after the base 210 and the first holder 600 are combined with each other, the As the adhesive 700 is cured, the base 210 and the first holder 600 may be fixed to each other.

In this case, the adhesive 700 may serve to seal the lens so that foreign substances are not introduced into the lens driving device. Therefore, when bonding the base 210 and the first holder 600 using the adhesive 700, it is necessary to apply the adhesive 700 so that the adhesive portion is sufficiently sealed.

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

9 , 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.

Meanwhile, as described above, the height h2 of the lens barrel 400 , that is, the length measured in the first direction from the upper surface of the image sensor 810 to the top of the lens barrel may be 4 mm to 6 mm.

In an embodiment, the blocking unit 500 has an effect of preventing the occurrence of breakage and cracking of the second coil 230 , the printed circuit board 250 , and the lens barrel 400 due to impact. Accordingly, the embodiment may increase the durability of the second coil 230 , the printed circuit board 250 , and the lens barrel 400 .

In addition, it is possible to prevent particles generated due to breakage or cracking of the second coil 230 , the printed circuit board 250 , and the lens barrel 400 from contaminating and damaging the inside of the lens driving device.

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 as a new embodiment through this.

210: base
211: base hollow
211a: base hollow end
230: second coil
232: second coil hollow
232a: second coil hollow end
250: printed circuit board
252: hollow printed circuit board
252a: printed circuit board hollow end
400: lens barrel
400a: bottom of lens barrel
400b: outer peripheral surface of the lens barrel
500: block
500a: top of the block
500b: inner circumferential surface of the blocking part
500c: outer peripheral surface of the blocking part
600: first holder
610: filter
700: adhesive
800: second holder
810: image sensor

Claims (20)

a base comprising a first hollow;
a circuit board disposed on the base and including a second hollow;
a circuit member disposed on the circuit board, the circuit member including a third hollow and forming a second coil; and
a lens barrel disposed on the base;
At least a portion of the lens barrel passes through the first to third hollows,
The base includes a blocking portion protruding from the upper surface and inserted into the second hollow of the circuit board and the third hollow of the circuit member,
At least a portion of the blocking portion overlaps the lens barrel in a direction perpendicular to the optical axis direction. According to claim 1,
The at least a portion of the inner peripheral surface of the blocking part overlaps the outer peripheral surface of the lens barrel in a direction perpendicular to the optical axis direction. According to claim 1,
The lowermost portion of the lens barrel is located under the first to third hollows. According to claim 1,
The blocking part is a camera module that protrudes in the optical axis direction along the circumferential direction of the first hollow end of the base. According to claim 1,
The upper end of the blocking part is located above the lower end of the lens barrel in the optical axis direction. According to claim 1,
The blocking part is a camera module passing through the second hollow and the third hollow. According to claim 1,
and an image sensor disposed to face the lens barrel in the optical axis direction. According to claim 1,
The blocking part is formed in a circular ring shape as viewed in the optical axis direction along the first hollow end of the base. According to claim 1,
A height of the outer circumferential surface of the blocking portion is greater than a thickness of the circuit board in the optical axis direction. According to claim 1,
The uppermost end of the blocking part is located higher than the upper surface of the circuit member camera module. According to claim 1,
a housing disposed on the circuit member; and
and a bobbin disposed in the housing and coupled to the lens barrel. 12. The method of claim 11,
a magnet disposed on the housing; and
and a first coil disposed on the bobbin and configured to move the bobbin in an optical axis direction by interaction with the magnet. 8. The method of claim 7,
a holder disposed under the base; and
and an infrared cut-off filter disposed on the holder to face the image sensor in the optical axis direction. 13. The method of claim 12,
an upper elastic member coupled to an upper portion of the bobbin and an upper portion of the housing; and
a support member electrically connecting the upper elastic member and the circuit board;
The camera module moves in a direction perpendicular to the optical axis direction by the interaction between the second coil and the magnet. According to claim 1,
The circuit board includes a terminal surface bent from an upper surface and a plurality of terminals formed on the terminal surface. a base comprising a first hollow;
a first circuit board disposed on the base and including a second hollow;
a circuit member disposed on the first circuit board and including a third hollow, in which a second coil is formed;
a lens barrel disposed on the base; and
An image sensor facing the lens barrel in the optical axis direction,
The base includes a blocking portion protruding from the upper surface and inserted into the second hollow and the third hollow,
The inner circumferential surface of the blocking portion is opposite to the lower portion of the outer circumferential surface of the lens barrel in a direction perpendicular to the optical axis direction. 17. The method of claim 16,
The blocking portion is formed to protrude in the optical axis direction along the circumferential direction of the first hollow end of the base. 17. The method of claim 16,
The blocking part passes through the second hollow and the third hollow,
The upper end of the blocking part is located higher than the upper surface of the circuit member camera module. 17. The method of claim 16,
A camera module including an infrared cut filter disposed between the lens barrel and the image sensor. A mobile device comprising the camera module according to any one of claims 1 to 19.

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