KR20170036346A - Lens moving unit and camera module including the same - Google Patents

Abstract

The present invention relates to a bobbin having at least one lens disposed on an inner side and a first coil mounted on an outer peripheral surface of the bobbin, a first magnet disposed on the periphery of the bobbin so as to face the first coil, a housing supporting the first magnet, A first lens driving unit for moving the bobbin in a first direction parallel to the optical axis by an interaction between the first magnet and the first coil, the first lens driving unit including upper and lower elastic members coupled to the bobbin and the housing, A plurality of support members movably supporting the housing in the second and third directions perpendicular to the first direction with respect to the base, a plurality of support members opposed to the first magnet, And a printed circuit board disposed on one surface of the base by an adhesive member, wherein the first magnet and the second magnet And a second lens driving unit for moving the housing in the second and third directions by an interaction of the two coils, wherein the printed circuit board includes a plurality of terminals provided on one surface of the printed circuit board, And a coating member provided so as to cover a part of both sides of the terminal provided.

Description

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

Embodiments relate to a lens driving apparatus and a camera module including the lens driving apparatus.

It is difficult to apply the technology of a voice coil motor (VCM) used in a conventional camera module to a camera module for ultra small size and low power consumption, and related research has been actively conducted.

In the case of a camera module mounted on a small electronic device such as a smart phone, the camera module may be frequently hit during use, and the camera module may be slightly shaken due to user's hand motion during shooting. In view of this, in recent years, there has been a demand for development of a technique for additionally installing the camera shake preventing means on the camera module.

In order to prevent the camera module from being shaken finely in accordance with the camera shake of the user during photographing, the optical module including at least one lens is mounted on a surface formed by the second and third directions perpendicular to the first direction parallel to the optical axis It is possible to move the optical module.

And may include a printed circuit board and a circuit member disposed on the printing plate and including at least one second coil for providing a force for moving the optical module in the second and third directions.

However, since the size of the printed circuit board differs from that of the circuit member, the printed circuit board may be twisted when the circuit member is assembled on one side of the printed circuit board, thereby deteriorating the quality of the camera module.

In addition, there is a problem that a gap is generated between a pad provided on one surface of a printed circuit board and a base on which the printed circuit board is assembled, thereby causing a bad contact.

In addition, when only a pad portion provided on one surface of the printed circuit board is provided, there is a problem that a part of the pad is separated from the printed circuit board at the time of soldering, thereby deteriorating the quality of the camera module.

In addition, a printed circuit board may be provided on one side of the base, and a circuit member may be provided on one side of the printed circuit board. When the base, the printed circuit board and the circuit member are sequentially assembled, The height of the circuit member is not constant.

In addition, when the thickness of the pattern protruding from the pad provided on one surface of the printed circuit board is thin, there is a problem that cracks are generated due to a predetermined impact applied from the outside of the pattern.

The lens driving apparatus and the camera module including the lens driving apparatus according to the embodiments have different sizes of the printed circuit board and the circuit member, so that when the circuit member is assembled on one side of the printed circuit board, the printed circuit board is twisted, And a camera module including the lens driving device.

In addition, the lens driving apparatus and the camera module including the lens driving apparatus according to the embodiments of the present invention have a predetermined clearance between a pad provided on one side of a printed circuit board and a base on which a printed circuit board is assembled, And a camera module including the lens driving device.

The present invention also relates to a lens driving apparatus for preventing a problem that a part of a pad is separated from a printed circuit board upon soldering to deteriorate the quality of a camera module when only a pad portion provided on one surface of a printed circuit board is provided, And a module is provided.

In addition, a printed circuit board may be provided on one side of the base, and a circuit member may be provided on one side of the printed circuit board. When the base, the printed circuit board and the circuit member are sequentially assembled, And a camera module including the same. [0012] According to the present invention, there is provided a lens driving apparatus for preventing a problem that a height of a circuit member is not constant.

In addition, when a thickness of a pattern protruding from a pad provided on one surface of a printed circuit board is small, a problem that a crack is generated due to a predetermined impact applied from the outside of the pattern, And a camera module including the same.

According to an embodiment of the present invention, there is provided a lens driving apparatus and a camera module including the lens driving apparatus. The lens driving apparatus includes a bobbin having at least one lens disposed on the inner side and a first coil on the outer circumference, A housing supporting the first magnet, and an upper and a lower elastic member coupled with the bobbin and the housing, wherein the first magnet and the first coil interact with each other by the interaction of the first magnet and the first coil, A first lens driving unit for moving the first lens driving unit in a first direction parallel to the optical axis and a base disposed at a constant distance from the first lens driving unit, A second coil disposed opposite to the first magnet, and a second coil disposed opposite to the first coil, And a second lens driving unit for moving the housing in the second and third directions by an interaction between the first magnet and the second coil, A plurality of terminals provided on one surface of the printed circuit board and a coating member covering a part of both sides of the plurality of terminals, .

Further, the present invention provides a lens driving apparatus in which a plurality of the terminals are arranged on a surface of the printed circuit board so as to be spaced apart from each other by a first length.

In addition, the first length is 0.01 mu m to 0.45 mu m.

In addition, the coating member is provided integrally on one surface of at least two terminals.

The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description when read in conjunction with the accompanying drawings, in which: FIGURE 1 is a perspective view of a lens driving apparatus according to an embodiment of the present invention;

Also, the coating member is provided to cover one side of the first terminal and is provided so as to cover both side surfaces of the second terminal.

In addition, the coating member is provided with a photo solder resist (PSR) or a coverlay.

It is another object of the present invention to provide a lens driving apparatus having a hollow shape including at least one protruding heights protruding radially outward from the center of the printed circuit board.

The lens driving apparatus according to claim 1, further comprising a circuit member including the second coil, wherein the diagonal length of the circuit member in the first direction is equal to the diagonal length of the printed circuit board in the first direction. .

It is a further object of the present invention to provide a lens driving apparatus wherein a diagonal length of the circuit member in a second direction intersecting with the first direction is equal to a diagonal length of the printed circuit board in the second direction.

In addition, it is preferable that at least one lens is provided on the inner side and a first coil is provided on the outer circumference, a first magnet disposed on the periphery of the bobbin so as to face the first coil, a housing for supporting the first magnet, And a first lens driving unit for moving the bobbin in a first direction parallel to the optical axis by an interaction between the first magnet and the first coil, A plurality of support members movably supporting the housing in the second and third directions perpendicular to the first direction with respect to the base, a plurality of support members arranged to face the first magnet, And a printed circuit board disposed on one side of the base by an adhesive member, wherein the first magnet and the second coil And a second lens driving unit for moving the housing in the second and third directions by an interaction between the terminals, wherein the printed circuit board includes a plurality of terminals provided on one surface of the printed circuit board, And a camera module including a lens driving device including a coating member provided to cover a part of both sides of the terminal, an image sensor, and a circuit board on which the image sensor is mounted.

The present invention also provides a camera module having a thickness of 400 m or more.

Further, the present invention provides a camera module having a hollow shape, wherein the printed circuit board includes at least one projecting portion projecting radially outward from a center of the printed circuit board.

The camera module of claim 1, further comprising a circuit member including the second coil, wherein the diagonal length of the circuit member in the first direction is the same as the diagonal length of the printed circuit board in the first direction. .

In addition, the coating member is provided with a photo solder resist (PSR) coverlay.

Further, the present invention provides a camera module wherein the coating member covers a part of an upper surface of the terminal.

The lens driving apparatus and the camera module including the lens driving apparatus according to the embodiments have different sizes of the printed circuit board and the circuit member, so that when the circuit member is assembled on one side of the printed circuit board, the printed circuit board is twisted, It is an object of the present invention to provide a lens driving device and a camera module including the lens driving device.

In addition, the lens driving apparatus and the camera module including the lens driving apparatus according to the embodiments of the present invention have a predetermined clearance between a pad provided on one side of a printed circuit board and a base on which a printed circuit board is assembled, It is an object of the present invention to provide a lens driving apparatus and a camera module including the lens driving apparatus.

The present invention also relates to a lens driving apparatus for preventing a problem that a part of a pad is separated from a printed circuit board upon soldering to deteriorate the quality of a camera module when only a pad portion provided on one surface of a printed circuit board is provided, Module is provided as an effect of the present invention.

In addition, a printed circuit board may be provided on one side of the base, and a circuit member may be provided on one side of the printed circuit board. When the base, the printed circuit board and the circuit member are sequentially assembled, The present invention provides a lens driving apparatus and a camera module including the lens driving apparatus, which prevent the problem that the height of the circuit member is not constant.

In addition, when a thickness of a pattern protruding from a pad provided on one surface of a printed circuit board is small, a problem that a crack is generated due to a predetermined impact applied from the outside of the pattern, It is an object of the present invention to provide a driving device and a camera module including the same.

1 is an exploded perspective view schematically showing a camera module according to an embodiment.
2 (a) and 2 (b) show an assembled lens barrel assembly, a sensor base, and a substrate unit according to an embodiment.
3 is a perspective view schematically showing a lens driving apparatus according to an embodiment.
4 is an exploded perspective view showing a lens driving apparatus according to an embodiment.
5 illustrates a base, a printed circuit board, and a second coil according to one embodiment.
6 illustrates an upper surface of a printed circuit board according to one embodiment.
7 illustrates a lower surface of a printed circuit board according to an embodiment.
8 illustrates the third printed circuit board portion 250c of the printed circuit board according to one embodiment in detail.
FIG. 9 illustrates a first terminal disposed in the third printed circuit board portion 250c according to an embodiment.
10 illustrates a second terminal disposed on the third printed circuit board portion 250c according to one embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to facilitate understanding of the present invention. However, the embodiments according to the present invention can be modified into various other forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. Embodiments of the invention are provided to more fully describe the present invention to those skilled in the art.

In the description of the embodiment according to the present invention, in the case of being described as being formed on the "upper" or "on or under" of each element, on or under includes both elements being directly contacted with each other or one or more other elements being indirectly formed between the two elements. Also, in the case of "", "above" or "on or under" and "" ", it may include not only an upward direction but also a downward direction based on one element.

It is also to be understood that the terms "first" and "second," "upper / upper / upper," and "lower / lower / lower" But may be used only to distinguish one entity or element from another entity or element, without necessarily requiring or implying an order.

The thickness and size of each layer in the drawings are exaggerated, omitted, or schematically shown for convenience and clarity of explanation. Also, the size of each component does not entirely reflect the actual size.

Hereinafter, a lens driving apparatus according to an embodiment will be described with reference to the accompanying drawings. For convenience of explanation, the lens driving apparatus according to the embodiment is described using the Cartesian coordinate system (x, y, z), but may be described using another coordinate system, and the embodiment is not limited to this. In the drawings, the x-axis and the y-axis indicate directions perpendicular to the z-axis, which is the optical axis direction, the z-axis direction as the optical axis direction is referred to as a first direction, the x-axis direction is referred to as a second direction, The axial direction can be referred to as a 'third direction'.

The "camera-shake correction device" applied to a small-sized camera module of a mobile device such as a smart phone or a tablet PC is to prevent the outline of the captured image from being formed due to the vibration caused by the hand- ≪ / RTI >

The "auto focusing device" is a device that automatically focuses an image of a subject on an image sensor surface. The camera shake correcting device and the auto focusing device may be configured in various manners. In the lens driving device according to the embodiment, the optical module composed of at least one lens is moved in a first direction parallel to the optical axis, It is possible to perform the camera shake correcting operation and / or the auto focusing operation by moving with respect to the surface formed by the second and third directions perpendicular to the optical axis.

1 is an exploded perspective view schematically showing a camera module according to an embodiment.

Referring to FIG. 1, the camera module according to the embodiment includes a bobbin 110 including a lens barrel configured to stack a plurality of lenses, a housing space for accommodating the bobbin 110, A sensor base 400 provided on the lower surface of the cover member 300 and supporting the lower surface of the cover member 300; a sensor base 400 disposed on one surface of the sensor base 400, An image sensor 500 for converting the light incident on the image sensor 500 into an electric signal and a space for arranging the image sensor 500 and transmitting and converting the electric signal converted by the image sensor 500 to a controller (Not shown).

The sensor base 400 may be provided between the lower surface of the cover member 300 and the upper surface of the substrate unit 600.

More specifically, the sensor base 400 may be attached to the lower surface of the cover member 300 to be coupled to the sensor base 400 and the cover member 300, and the sensor base 400 and the cover member 300 May be assembled so as to be seated on the upper surface of the substrate unit 600.

However, this is an embodiment, and the user can move the sensor base 400 as needed to directly couple the cover member 300 and the substrate unit 600, which limits the scope of the present invention No.

The sensor base 400 may further include a filter unit 410 at the center.

The sensor base 400 may be optically hollow so that the lens barrel collects light from the outside and transmits the light through the sensor base 400 to the image sensor 500.

That is, the light collected from the outside by the lens barrel passes through the center of the sensor base 400. At this time, the filter unit 410 is disposed at the center of the sensor base 400, 500, respectively.

The filter unit 410 of the embodiment may be an IR Cut Off Filter.

The infrared ray filter includes an infrared ray region of a wavelength band that can not be seen by a human being, and the image sensor 500 recognizes the infrared ray region as light, It is a member for shielding the light in the wavelength range of the infrared region.

However, the filter unit 410 of the embodiment may be provided as a filter for blocking other wavelength band other than the wavelength band of the infrared region, if necessary, and does not limit the scope of the present invention.

The substrate unit 600 includes a substrate base 610 providing a surface on which the bobbin 110, the cover member 300, the sensor base 400 and the image sensor 500 are disposed, And one end of the connector 650 is electrically connected to the substrate base 610 and the other end of the connector 650 is electrically connected to the connector 650 so as to be formed in the substrate base 610. [ And a connection board 630 provided to transmit the electrical signal to the connector unit 650.

The connection substrate 630 may be a flexible printed circuit board (FPCB).

If the connecting board 630 is provided as a flexible board, unlike a conventional printed circuit board, the connecting board 630 can be freely rotated so that a limited space can be used more efficiently.

However, this is an embodiment, and the connecting board 630 may be a general printed circuit board instead of a flexible board according to the needs of the user, and does not limit the scope of the present invention.

2 (a) and 2 (b) show an assembled lens barrel assembly, a sensor base, and a substrate unit according to an embodiment.

2 (a) and 2 (b), a sensor base 400, an image sensor (not shown), and a bobbin 110 are accommodated in an upper surface of a substrate base 610 of a substrate unit 600 And the cover member 300 may be stacked in order.

The substrate base 610 may include a plurality of terminal portions 611 electrically connecting the substrate portion 600 and the image sensor 500 to at least one surface where the substrate base 610 and the cover member 300 are in contact with each other. have.

The terminal portion 611 includes a first terminal portion 6111 provided along the first surface of the lower surface of the cover member 300 and a second terminal portion 6111 provided along the second surface facing the first surface of the lower surface of the cover member 300. [ And may include a terminal portion 6113.

The third surface of the lower surface of the cover member 300 on which the first terminal portion 6111 is disposed and the third surface of the lower surface of the cover member 300 are disposed on the fourth surface opposite to the third surface, ).

That is, the epoxy 700 can be disposed on the lower surface of the cover member 300 where the terminal unit 611 is not provided. This is because when the epoxy 700 is disposed on the terminal unit 611, .

The epoxy 700 and the terminal unit 611 may be disposed at different positions according to the user's need and the image sensor 500 and the substrate unit 600 are electrically connected to each other through the terminal unit 611, So that the cover member 300 and the sensor base 400 are physically coupled to each other.

Fig. 3 shows a schematic perspective view of the lens driving apparatus according to the embodiment, and Fig. 4 shows an exploded perspective view of the lens driving apparatus illustrated in Fig.

Referring to FIG. 3, the lens driving apparatus according to the embodiment may include a first lens driving unit (not shown), a second lens driving unit (not shown), and a cover member 300. Here, the first lens driving unit 100 performs the role of the above-described auto focusing device, and the second lens driving unit 200 can perform the role of the above-described shaking motion correcting device.

The cover member 300 may be provided in a substantially box shape, and may cover the first and second lens driving units (not shown).

As shown in FIG. 4, the lens driving apparatus according to the embodiment may include a movable portion. At this time, the movable portion can perform functions of auto focusing of the lens and correction of camera 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 has a first coil 120 disposed on an outer circumferential surface of the first magnet 130 and a second coil 120 disposed on an inner side of the first magnet 130. The bobbin 110 has an electromagnetic interaction between the first magnet 130 and the first coil 120 And may be installed in the inner space of the housing 140 to reciprocate in the first direction. The first coil 120 may be installed on the outer circumferential surface of the bobbin 110 to enable electromagnetic interaction with the first magnet 130.

Further, the bobbin 110 is elastically supported by the upper and lower elastic members 150 and 160, and can perform the auto focusing function by moving in the first direction.

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

For example, female threads may be formed on the inner circumferential surface of the bobbin 110, male thread corresponding to the threads may be formed on the outer circumferential surface of the lens barrel, and the lens barrel may be coupled to the bobbin 110 by screwing. However, the present invention is not limited thereto, and the lens barrel may be directly fixed to the inside of the bobbin 110 by a method other than screwing, without forming a thread on the inner circumferential surface of the bobbin 110. Alternatively, the one or more lenses may be formed integrally with the bobbin 110 without a lens barrel.

The lens coupled to the lens barrel may be composed of a single lens, 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 realized by moving the bobbin 110 in the first direction. For example, when the forward current is applied, the bobbin 110 can move upward from the initial position, and when the reverse current is applied, the bobbin 110 can move downward from the initial position. Alternatively, the amount of unidirectional current may be adjusted to increase or decrease the movement distance from the initial position in one direction.

The upper and lower surfaces of the bobbin 110 may have a plurality of upper support protrusions and lower support protrusions. The upper support protrusion may be provided in a cylindrical shape or a prismatic shape, and the upper elastic member 150 may be engaged and fixed. The lower support protrusions may be cylindrical or prismatic like the upper support protrusions, and the lower elastic members 160 may be engaged and fixed.

The upper elastic member 150 may be provided on the upper side of the bobbin 110 and the lower elastic member 160 may be provided on the lower side of the bobbin 110. At this time, the upper elastic member 150 may have a through hole corresponding to the upper supporting protrusion, and the lower elastic member 160 may have a through hole corresponding to the lower supporting protrusion. The support protrusions and the through holes may be fixedly joined by an adhesive member such as a thermal fusion adhesive or an epoxy.

The housing 140 has a hollow column shape for 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 coupled to the side surface of the housing 140.

As described above, the bobbin 110, which is guided by the elastic members 150 and 160 and moves in the first direction, may be disposed inside the housing 140. In an embodiment, the first magnet 130 may be disposed at a corner of the housing 140, and the support member 220 may be disposed at a side surface thereof.

The upper elastic member 150 and the lower elastic member 160 can elastically support the bobbin 110 in the first direction in the upward and downward directions. The upper elastic member 150 and the lower elastic member 160 may be formed of leaf springs.

As shown in FIG. 2, the upper elastic member 150 may be provided as two separate members. The divided portions of the upper elastic member 150 can be supplied with different polarity currents or different power sources through the two-divided structure. Further, as a modified embodiment, the lower elastic member 160 may have a two-piece structure, and the upper elastic member 150 may have an integral structure.

Meanwhile, the upper elastic member 150, the lower elastic member 160, the bobbin 110, and the housing 140 may be assembled through heat bonding and / or bonding using an adhesive or the like. At this time, it is possible to finish the fixing work by bonding using, for example, an adhesive after fixing by heat fusion.

The base 210 is disposed at a lower portion of the bobbin 110 and may be formed in a substantially rectangular shape. The printed circuit board 250 may be seated and the lower side of the support member 220 may be fixed. In addition, a support member 220 mounting groove 214 into which the support member 220 can be inserted may be recessed on the upper surface of the base 210. An adhesive may be applied to the seating groove 214 of the supporting member 220 to fix the supporting member 220 so as not to move.

A supporting groove having a corresponding size may be formed on a surface of the base 210 opposite to a portion on which the terminal surface 2511 of the printed circuit board 250 is formed. The support groove is recessed to a certain depth from the outer circumferential surface of the base 210 so that the portion where the terminal surface 2511 is formed is prevented from protruding outward or can be adjusted.

The support member 220 is disposed on the side surface of the housing 140 and has an upper side coupled to the housing 140 and a lower side coupled to the base 210. The bobbin 110 and the housing 140 Can be movably supported in a second direction and a third direction perpendicular to the first direction, and can be electrically connected to the first coil (120).

Since the support members 220 according to the embodiment are respectively disposed on the outer sides of the quadrangle of the housing 140, a total of four support members 220 may be installed symmetrically. However, the present invention is not limited to this, and it is also possible that the number of each of the two linear surfaces is eight. The support member 220 may be electrically connected to the upper elastic member 150 or may be electrically connected to the linear surface of the upper elastic member 150.

Since the support member 220 is formed separately from the upper elastic member 150, the support member 220 and the upper elastic member 150 can be electrically connected through a conductive adhesive agent, solder, or the like. Accordingly, the upper elastic member 150 can apply an electric current to the first coil 120 through the electrically connected support member 220.

4, the plate-like supporting member 220 is illustrated as an embodiment, but the present invention is not limited thereto. That is, the support member may be provided in a wire form.

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

Here, the second and third directions may include directions substantially in the x- and y-axis directions as well as the x- and y-axis directions. In other words, as seen from the driving aspect of the embodiment, the housing 140 may move parallel to the x- and y-axes, but may also be slightly inclined to the x- and y-axes when it is supported by the support member 220 have.

Also, 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 at a predetermined distance below the first magnet 130.

According to the embodiment, a total of four second coils 230 may be provided at four corners of the circuit member 231, but the present invention is not limited thereto, and one coil for the second direction and one coil for the third direction Only two can be installed, and more than four may be installed.

A circuit pattern may be formed on the circuit member 231 in the form of a second coil 230 and a separate second coil may be disposed on the circuit member 231. However, Only a separate second coil 230 may be disposed on the circuit member 231 without forming a circuit pattern on the member 231 in the form of the second coil 230. [

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

The second coil 230 may be disposed on the upper side of the base 210 and the lower side of the housing 140. At this time, 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, the present invention is not limited thereto. The second coil 230 may be disposed closely to the base 210, may be spaced apart from the base 210, may be separately formed on the substrate, It may also be laminated.

The printed circuit board 250 is coupled to the upper surface of the base 210 and has a through hole or groove at a corresponding position to expose the seating groove 214 of the supporting member 220, .

The printed circuit board 250 may have a bent terminal surface 2511 to which the terminal 251 is attached. The embodiment shows a printed circuit board 250 on which two bent terminal surfaces 2511 are formed. A plurality of terminals 251 are disposed on the terminal surface 2511 so that current can be supplied to the first coil 120 and the second coil by receiving external power. The number of terminals formed on the terminal surface 2511 may be increased or decreased according to the type of components required to be controlled. In addition, the printed circuit board 250 may have one or more terminal surfaces 2511.

The cover member 300 may be provided in a substantially box shape and may receive the moving part, the second coil 230, a part of the printed circuit board 250, and the like, and may be coupled with the base 210. The cover member 300 protects the movable part, the second coil 230, the printed circuit board 250 and the like received in the first and second magnets 130 and 130, The electromagnetic field generated by the coil 120, the second coil 230, and the like can be prevented from leaking to the outside so that the electromagnetic field can be focused.

5 is an exploded perspective view illustrating a base 210, a printed circuit board 250, and a second coil 230 according to an embodiment. The lens driving device may further include a position sensing sensor 240. [

The position sensor 240 may be disposed at the center of the second coil 230 to detect movement of the housing 140. At this time, the position sensing sensor 240 may basically sense the movement of the housing 140 in the first direction, and may detect the movement of the housing 140 in the second and third directions in some cases .

The position sensing sensor 240 may be a hall sensor or the like, and any sensor capable of sensing a change in magnetic force may be used. 5, a total of two position sensing sensors 240 may be installed at the corners of the base 210 disposed on the lower side of the printed circuit board 250, and the mounted position sensing sensors 240 May be inserted into the positioning sensor mounting groove 215 formed in the base 210. The lower surface of the printed circuit board 240 may be opposite the surface on which the second coil 230 is disposed.

Meanwhile, the position sensor 240 may be disposed at a predetermined distance below the second coil 230 with the printed circuit board 250 interposed therebetween. That is, the position sensing sensor 240 is not directly connected to the second coil 230, and the second coil 230 is disposed on the upper surface of the PCB 240, and the position sensor 240 may be installed.

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

The camera module according to the embodiment may include a lens barrel coupled to the bobbin 110, and an image sensor (not shown). At this time, the lens barrel may include at least one lens that transmits an image to the image sensor.

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

In this case, in the base 210 illustrated in FIG. 3, an infrared cut filter may be installed at a position corresponding to the image sensor, and may be coupled to a holder member (not shown). Further, the holder member can support the lower side of the base 210.

A separate terminal member may be provided on the base 210 for energizing the printed circuit board 250, or a terminal may be integrally formed using a surface electrode or the like.

In addition, it may further include an adhesive member 211 for adhering the printed circuit board 250 to the base 210.

The adhesive member 211 may be provided on one side of the base 210 and may be provided at a position where one side of the base 210 and one side of the printed circuit board 250 are in surface contact with each other, .

Although the adhesive member 211 is shown as being provided on one side of the base 210 in this embodiment, the adhesive member 211 may be further provided on the side opposite to the side where the adhesive member 211 is provided.

The adhesive member 211 shown in this embodiment is merely an example, and it suffices to merely adhere the printed circuit board 250 to the base 210, and the position and the number of the adhesive member 211 And does not limit the scope of rights of the present invention.

The base 210 may further include a stepped portion in the seating groove 214, which is a spring unit (not shown).

An adhesive member 211 may be provided on one side of the base 210 to bond the base 210 and the printed circuit board 250 to each other. If the amount of the adhesive member 211 is small, The adhesive force of the circuit board 250 may be lowered and the printed circuit board 250 may be lifted from the base 210. When the amount of the adhesive member 211 is larger than the amount of the adhesive member 211, And the spring unit (not shown) is difficult to accurately engage with the attachment groove 214.

Therefore, it is possible to further prevent the adhesion member 211 from entering the seating groove 214 by providing a stepped portion in the seating groove 214 of the base 210.

The step portion is formed by at least one side surface portion 2143 forming the side surface of the step portion, a lower surface portion 2142 forming the lower surface of the step portion, a side surface portion 2143 and a lower surface portion 2142, A stepped space 2141 may be formed.

The cross section of the lower surface portion 2142 of the stepped space 2141 may be provided in a planar shape.

The lower surface portion 2142 of the stepped space 2141 may have a convex shape in a first direction perpendicular to the lower surface portion 2142.

The bottom surface portion 2142 of the stepped space 2141 is convex in a first direction perpendicular to the bottom surface portion 2142 so that the bonding members 211 are gathered toward both sides of the bottom surface portion 2142 There is an effect that it is possible to more effectively prevent the adhesive member 211 from flowing into the seating groove 214.

The lower surface portion 2142 of the step space 2141 may have a concave shape in a first direction perpendicular to the lower surface portion 2142.

The lower surface portion 2142 of the stepped space 2141 is concave in the first direction perpendicular to the lower surface portion 2142 so that the adhesive member 211 is gathered toward the center of the lower surface portion 2142 There is an effect that it is possible to more effectively prevent the adhesive member 211 from flowing into the seating groove 214.

In addition, a section of the lower surface portion 2142 of the stepped space 2141 may be formed in a sinusoidal shape.

The lower surface portion 2142 of the step space 2141 is formed in a sinusoidal shape so that the adhesive member 211 is gathered in a plurality of recesses formed in the lower surface portion 2142, So that it is possible to more effectively prevent entry into the seating groove 214.

Also, in this embodiment, one step portion is shown as one, but a plurality of step portions may be provided.

Since a plurality of stepped portions are provided, a space for accommodating the adhesive member 211 can be formed by two or three or more, so that it is possible to more effectively prevent the adhesive member 211 from flowing into the seating groove 214 It is effective.

The lower surface portion 2142 may further include a plurality of protruding members 2144.

The plurality of protruding members 2144 may protrude upward from the lower surface portion 2142 at a predetermined height.

Since the plurality of protruding members 2144 are provided on the lower surface portion 2142 to increase the resistance in flowing the adhesive member 211 flowing into the stepped portion, 214 can be prevented more efficiently.

Although the plurality of protruding members 2144 are illustrated as being hemispherical in the figure, the protruding members 2144 may be formed in a conical shape or a polygonal shape.

Meanwhile, the base 210 may function as a sensor holder for protecting the image sensor. In this case, a protrusion may be formed downward along the side surface of the base 210. However, this is not essential, and although not shown, a separate sensor holder may be disposed below the base 210 to perform its role.

FIG. 6 is a top view of a printed circuit board according to an embodiment, and FIG. 7 is a bottom view of a printed circuit board according to an embodiment.

6 and 7, the printed circuit board 250 of the embodiment includes a first printed circuit board portion 250a, a first printed circuit board portion 250a, and a second printed circuit board portion 250b which are provided in a hollow shape to receive the bobbin 110, A second printed circuit board part 250b extending to at least one side of the printed circuit board 250b and extending to at least one side of the second printed circuit board part 250b, And a pattern 251 that electrically connects the first printed circuit board 250 and the second printed circuit board portion 250c to a control unit (not shown).

The first printed circuit board portion 250a may be formed in a hollow shape having a center C in the center.

In addition, the first printed circuit board portion 250a may be provided in a hollow shape including at least one concave portion 253 formed concavely outward from the inner circumferential surface in the radial direction.

The recess 253 may be formed to define a groove on the inner circumferential surface of the first printed circuit board unit 250a.

The lens driving apparatus of the embodiment may include a printed circuit board 250 on the upper surface of the base 210 and a circuit member 231 on the upper surface of the printed circuit board 250.

In other words, the lens driving apparatus of the embodiment may be provided so as to be stacked in this order from the bottom to the base 210, the printed circuit board 250 and the circuit member 231. In the first printed circuit board portion 250a, The circuit member 231 may be provided so as to be in surface contact with the printed circuit board 250 when the projecting weight 253 is not provided.

Since the circuit member 231 is in surface contact with the printed circuit board 250 and the printed circuit board 250 is in surface contact with the base 210, A member (not shown) may be provided to contact the printed circuit board 250 without contacting the circuit member 231 directly.

According to the above structure, the height from the lower surface of the base 210 to one surface of the circuit member 231 may vary according to the thickness of the printed circuit board 250, which makes it difficult to keep the quality of the lens driving apparatus constant .

However, since the first printed circuit board portion 250a is provided with the plurality of protruding middle portions 253, the protruding member (not shown) provided on the upper surface of the base 210 described above is provided with the protruding middle portion 253 So as to be in direct contact with the circuit member 231.

Thereby, the height from the lower surface of the base 210 to one surface of the circuit member 231 can be kept constant.

As shown in the drawing, the protruding weights 253 are two in the first quadrant, two in the second quadrant, and two in the third quadrant in the coordinate system having the center of the first printed circuit board portion 250a as the origin, And two in the fourth quadrant, so that a total of eight can be provided.

The shape, position and number of protrusions 253 can be variously modified by the user depending on the shape of the base 210, The scope shall not be limited.

The first printed circuit board portion 250a may be provided to have a first diagonal length X1 from the center.

In addition, the first printed circuit board portion 250a may be provided to have a second diagonal length X2 that intersects the first diagonal length X1 from the center.

The first diagonal length X1 and the second diagonal length X2 may be equal to each other.

On the other hand, the first diagonal length X1 and the second diagonal length X2 may be different from each other.

The first diagonal length X1 and the second diagonal length X2 may be orthogonal to each other and the first diagonal length X1 and the second diagonal length X2 may not be orthogonal.

The first diagonal length X1 of the circuit board portion 250 may be set to be larger than the first diagonal length X1 of the circuit member 231. [ As shown in FIG.

The second diagonal length X2 of the circuit board portion 250 may be the same as the second diagonal length X2 of the circuit member 231. [

The first diagonal length X1 of the circuit board portion 250 is equal to the first diagonal length X1 of the circuit member 231 and the second diagonal length X2 of the circuit board portion 250 is equal to the first diagonal length X1 of the circuit member 231. [ And may be the same as the second diagonal length X2 of the circuit member 231. [

At least one of the first diagonal length X1 or the second diagonal length X2 of the circuit board portion 250 is equal to the first diagonal length X1 or the second diagonal length X2 of the circuit member 231 It is possible to prevent the circuit board portion 250 or the circuit member 231 from being twisted when the circuit member 231 is stacked on one side of the circuit board portion 250 to improve the quality of the camera module.

The second printed circuit board portion 250b may extend from one surface of the first printed circuit board portion 250a. More specifically, the second printed circuit board portion 250b may extend from the opposite surfaces of the first printed circuit board portion 250a in opposite directions As shown in FIG.

The second printed circuit board portion 250b includes a third printed circuit board portion 250c to be described later extending from the first printed circuit board portion 250a and the second printed circuit board portion 250b, (Not shown) to be electrically connected to the electrode terminal (not shown).

Accordingly, the second printed circuit board portion 250b may be a flexible printed circuit board (FPCB).

The first printed circuit board portion 250b, the second printed circuit board portion 250b, and the third printed circuit board portion 250c may be integrally formed.

Accordingly, not only the second printed circuit board part 250b but also the first printed circuit board part 250a and the third printed circuit board part 250c may be formed as a flexible board.

The second printed circuit board portion 250b and the third printed circuit board portion 250c are mounted on an optical module (not shown) that moves in the second and third directions perpendicular to the first direction parallel to the optical axis And at least one elastic member opening 254 for providing an accommodation space for accommodating an anti-shake elastic member (not shown) for providing an elastic force to the elastic member.

The number of the elastic member openings 254 may vary depending on the number of anti-shake elastic members (not shown) required for the lens driving device. And the shape and size can also be modified according to the needs of the user, and this does not limit the scope of right of the present invention.

The third printed circuit board portion 250c includes at least one terminal 251 and a third printed circuit board portion 250c that are electrically connected to a controller (not shown), and a portion of the at least one terminal 251 And a coating member 252 provided so as to cover the display unit 252.

The terminal 251 and the coating member 252 will be described in detail with reference to FIGS. 8 to 10. FIG.

FIG. 8 is a detailed view of the third printed circuit board portion 250c according to one embodiment.

8, the third printed circuit board portion 250c may include at least one terminal 251 on one side thereof. The terminal 251 extends from the third printed circuit board portion 250c to a first length As shown in FIG.

More specifically, the first length may be 400 m or more.

There is a problem that cracks are generated in the terminal 251 when the terminal 251 contacts with a part of the printed circuit board 250 to be electrically connected to a control unit The terminal 251 is prevented from cracking due to being protruded from the substrate portion 250c by 400 m or more, thereby improving the reliability and quality of the camera module.

The plurality of terminals 251 may have a width W and a height H. The plurality of terminals 251 may have the same width and height, And may have a length and a height.

The terminal 251 may include a first terminal A disposed at both ends of the third printed circuit board portion 250c and a second terminal B disposed between the first terminal A .

The plurality of terminals 251 may be disposed on the third printed circuit board unit 250c to be spaced apart from each other by a second length d.

A coating member 252 may be disposed on a portion of the terminal 251 and a portion of the plurality of terminals 251 separated by the second length d.

Since the coating member 252 is disposed on the portion of the terminal 251 and the portion where the plurality of terminals 251 are spaced apart, the thickness of the third printed circuit board portion 250c may be thickened by a predetermined height from the lower surface of the third printed circuit board portion 250c have.

Therefore, when the printed circuit board portion 250 is assembled, the assembly tolerance is minimized, thereby preventing quality deterioration due to poor contact.

In addition, the second length d may be 0.01 um.

When the coating member 252 is coated on at least two terminals 251 by assembling the plurality of terminals 251 to be 0.01 μm so that the printed circuit board unit 250 is assembled, There is an effect that it is prevented from being detached from the circuit board portion 250.

The coating member 252 may be a photo solder resist (PSR) or a coverlay.

PSR is a material that is applied to prevent lead bridge generation during soldering after parts are mounted on a circuit board and to prevent oxidation of the exposed circuit.

FIG. 9 illustrates a first terminal A disposed on a third printed circuit board portion 250c according to an exemplary embodiment. FIG. 10 illustrates a first terminal A disposed on a third printed circuit board portion 250c according to an exemplary embodiment. And a second terminal B connected to the second terminal.

Hereinafter, the coating member 252 disposed at the first terminal A and the second terminal B will be described with reference to Figs. 9 and 10. Fig.

The first terminal A is disposed at both ends of the third printed circuit board unit 250c and the second terminal B is disposed at a predetermined distance between the first terminals A .

The coating member 252 disposed on the first terminal A may be applied to only one end of the first terminal A. [

More specifically, the first terminal A is provided with a width W, and the coating member 252 can be arranged to extend from the end of the first terminal A by the third length O1.

That is, when the total width of the first terminal A is H1 XW, the width of the coating member 252 is O1 X H1 and the width of the coating member 252 is W-O1 X H1 Lt; / RTI >

The coating member 252 disposed on the second terminal B may be applied to both ends of the second terminal B. [

The width W of the second terminal B may be W and the coating member 252 may be arranged to extend from both ends of the second terminal B by the third length O1.

That is, when the overall width of the second terminal B is H1 XW, the width of the coating member 252 is 2 X (O1 X H1) and the width of the coating member 252 is not W- 2 X O1) X H1.

In addition, the coating member 252 may be disposed on a portion of the upper surface of the terminal 251.

In addition, the coating member 252 may be disposed on a portion of both sides of the terminal 251 and a portion of the upper surface of the terminal 251.

It should be noted that this is an embodiment and the coating member 252 is applied to two neighboring terminals 251 to prevent a part of the terminal 251 from being separated from the third printed circuit board 250c And the position, width, and the like of the coating member 252 may be changed according to the needs of the user, and the scope of the present invention is not limited thereto.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be modified and implemented. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

100: first lens driving unit 200: second lens driving unit
110: bobbin 120: first coil
130: first magnet 140: housing
147: engaging projection 150: upper elastic member
160: lower elastic member 180: second magnet
182: metal for magnetic field compensation 210: base
214: support member seat groove 215: second sensing sensor seat groove
220: a plurality of pairs of support members 214:
250a: first printed circuit board part 250b: second printed circuit board part
250c: third printed circuit board portion 251: terminal
252: coating member

Claims (16)

A bobbin in which at least one lens is provided on the inner side and a first coil is provided on the outer side; A first magnet disposed on the periphery of the bobbin so as to face the first coil; A housing for supporting the first magnet; And a first lens driving unit for moving the bobbin in a first direction parallel to the optical axis by interaction between the first magnet and the first coil, the upper and lower elastic members being coupled to the bobbin and the housing. And
A base disposed at a predetermined distance from the first lens driving unit; A plurality of support members movably supporting the housing in the second and third directions perpendicular to the first direction with respect to the base; A second coil disposed opposite the first magnet; And a printed circuit board disposed on one side of the base by an adhesive member, the second lens driving unit moving the housing in the second and third directions by an interaction between the first magnet and the second coil, Unit,
Wherein the printed circuit board includes:
A plurality of terminals provided on one surface of the printed circuit board; And
And a coating member covering a part of both sides of the plurality of terminals. The method according to claim 1,
Wherein the plurality of terminals are disposed on one surface of the printed circuit board so as to be spaced apart from each other by a first length. 3. The method of claim 2,
Wherein the first length is from 0.01 [mu] m to 0.45 [mu] m. The method according to claim 1,
Wherein the coating member is integrally provided on one surface of at least two terminals. The method according to claim 1,
The terminal includes:
A first terminal disposed at both ends of the printed circuit board; And
And a second terminal disposed between the first terminals. 6. The method of claim 5,
Wherein the coating member is provided so as to cover one side of the first terminal and covers both side surfaces of the second terminal. The method according to claim 1,
Wherein the coating member comprises a photo solder resist (PSR) or a coverlay. The method according to claim 1,
Wherein the printed circuit board has a hollow shape including at least one projecting portion protruding radially outward from a center of the printed circuit board. The method according to claim 1,
And a circuit member including the second coil,
Wherein the diagonal length of the circuit member in the first direction is equal to the diagonal length of the printed circuit board in the first direction. 10. The method of claim 9,
Wherein a diagonal length of the circuit member in a second direction intersecting with the first direction is equal to a diagonal length of the printed circuit board in the second direction. A bobbin in which at least one lens is provided on the inner side and a first coil is provided on the outer side; A first magnet disposed on the periphery of the bobbin so as to face the first coil; A housing for supporting the first magnet; And a first lens driving unit for moving the bobbin in a first direction parallel to the optical axis by interaction between the first magnet and the first coil, the upper and lower elastic members being coupled to the bobbin and the housing. And
A base disposed at a predetermined distance from the first lens driving unit; A plurality of support members movably supporting the housing in the second and third directions perpendicular to the first direction with respect to the base; A second coil disposed opposite the first magnet; And a printed circuit board disposed on one side of the base by an adhesive member, the second lens driving unit moving the housing in the second and third directions by an interaction between the first magnet and the second coil, Unit,
Wherein the printed circuit board includes:
A plurality of terminals provided on one surface of the printed circuit board; And
And a coating member provided to cover parts of both sides of the plurality of terminals.
Image sensor; And
And a circuit board on which the image sensor is mounted. 12. The method of claim 11,
Wherein the terminal has a thickness of 400um or more. 12. The method of claim 11,
Wherein the printed circuit board has a hollow shape including at least one protruding heights protruding radially outward from a center of the printed circuit board. 12. The method of claim 11,
And a circuit member including the second coil,
Wherein the diagonal length of the circuit member in the first direction is equal to the diagonal length of the printed circuit board in the first direction. 12. The method of claim 11,
Wherein the coating member is a photo solder resist (PSR) coverlay. 12. The method of claim 11,
Wherein the coating member is provided to cover a part of an upper surface of the terminal.

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