Lens moving device and camera module including the same

Abstract

A lens moving device is disclosed. The lens moving device includes: a bobbin equipped with at least one lens; a coil and a driving magnet disposed to face each other to move the bobbin in an optical axis direction of the lens by an interaction between the coil and the driving magnet; the first circuit board is used for supplying current required by the coil; and a cover can and a base which are coupled, contacted, supported, fixed or temporarily fixed to each other to form a space for receiving the bobbin, the driving magnet, and the first circuit board, in which the cover can is electrically connected to a second circuit board on which an image sensor is mounted.

Description

[0001] This case is a divisional application. The application date of the parent case is August 6, 2015, the application number is 202110667197.4, and the name of the invention is “Lens moving device and camera module including the lens moving device”; the application date of the parent case of the divisional application with application number 202110667197.4 is August 6, 2015, the application number is 201510478704.4, and the name of the invention is “Lens moving device and camera module including the lens moving device”. Technical Field

[0002] Embodiments relate to a lens moving device and a camera module including the lens moving device. Background Art

[0003] In recent years, the development of IT products equipped with digital cameras, such as mobile phones, smartphones, tablets, and laptops, has been booming. Camera modules equipped with these digital cameras are required to provide various functions, such as autofocus, image stabilization, and zooming. Furthermore, efforts are underway to miniaturize high-pixel camera modules.

[0004] Meanwhile, shielding against electromagnetic interference (EMI), including electrical noise generated from components included in conventional camera modules, such as coils and sensors, is highly desirable.

[0005] Furthermore, conventional camera modules cannot recognize the position of an object. Consequently, the resolution of the actuator varies due to hysteresis or repeatability. Consequently, conventional camera modules have the problem of taking a long time to perform an automatic correction function. Summary of the Invention

[0006] The embodiment provides a lens moving device capable of shielding electromagnetic interference and a camera module including the lens moving device.

[0007] In addition, the embodiment provides a camera module that can quickly and accurately perform an auto-focusing function.

[0008] In one embodiment, a lens moving device includes: a bobbin equipped with at least one lens; a coil and a driving magnet arranged opposite to each other, wherein the bobbin is moved in the optical axis direction of the lens through the interaction between the coil and the driving magnet; a first circuit board for supplying the current required for the coil; and a cover can and a base coupled to, in contact with, supported, fixed or temporarily fixed to each other, for forming a space for receiving the bobbin, the driving magnet and the first circuit board, wherein the cover can is electrically connected to a second circuit board on which an image sensor is mounted.

[0009] The first circuit board may include an electromagnetic interference (EMI) shielding terminal connecting the cover can and the second circuit board.

[0010] The can cover may include at least one can protrusion protruding in a first direction parallel to the optical axis, the at least one can protrusion being connected to the second circuit board. The base may include a raised recess, the at least one can protrusion being mounted on, inserted into, embedded in, in contact with, coupled to, fixed to, temporarily fixed to, located in, or supported by the raised recess. The at least one can protrusion may be connected to the second circuit board via soldering, conductive epoxy, or welding.

[0011] The lens moving device may further include a housing member for supporting the driving magnet and the first circuit board, the housing member being coupled to, embedded in, in contact with, fixed to, supported by, or located on the base.

[0012] The first circuit board may be located below the housing member.

[0013] The lens moving device may further include a displacement sensing unit for sensing a first displacement value of the bobbin in the optical axis direction, wherein the first circuit board may be mounted on, inserted into, embedded in, contacted with, coupled to, fixed to, supported on or located on an outer surface of one side of the housing member.

[0014] The housing member may have a sensor through hole formed on one side thereof, and the first circuit board is mounted on, inserted into, embedded in, contacted with, coupled to, fixed to, supported on or located at the sensor through hole, so that the displacement sensing unit is inserted into, located at or embedded in the sensor through hole.

[0015] The lens moving device may further include a sensing magnet located at a position corresponding to the displacement sensing unit and the sensor through-hole.

[0016] The EMI shield terminals may be plated with gold.

[0017] The cover may be made of metal.

[0018] The first circuit board may further include I 2 C communication terminal and power terminal for receiving external power.

[0019] The cover may be a yoke-covered can.

[0020] In another embodiment, the lens moving device includes: a bobbin equipped with at least one lens; a coil and a driving magnet arranged opposite to each other, for moving the bobbin in the optical axis direction of the at least one lens through the interaction between the coil and the driving magnet; a first circuit board for supplying the current required by the coil; a cover pot and a base coupled to each other, for forming a space for receiving the bobbin, the driving magnet and the first circuit board; and a cover covered by the cover pot, for fixing and supporting the bobbin, the driving magnet being coupled to the cover, wherein the cover is connected to a second circuit board on which an image sensor is mounted.

[0021] The first circuit board may include an electromagnetic interference shielding terminal connecting the cover and the second circuit board.

[0022] The EMI shielding terminal may include an upper terminal portion connected to the cover can or the cover and a lower terminal portion connecting the second circuit board and the upper terminal portion. The EMI shielding terminal may further include an intermediate terminal portion located between the upper terminal portion and the lower terminal portion for interconnecting the upper terminal portion and the lower terminal portion.

[0023] The upper terminal portion may be connected to the cover can or the cover by soldering, conductive epoxy, or welding, and the lower terminal portion may be connected to the second circuit board by soldering, conductive epoxy, or welding.

[0024] In another embodiment, a camera module includes an image sensor, a second printed circuit board on which the image sensor is mounted, and the lens moving device having the above-mentioned construction.

[0025] In another embodiment, the camera module includes: a bobbin equipped with at least one lens; a position sensing unit for sensing the position of the bobbin in the optical axis direction and outputting the sensed bobbin position as position information; a first coil and a driving magnet arranged opposite to each other, for moving the bobbin in the optical axis direction of the lens; and a focal length controller for controlling the interaction between the first coil and the driving magnet based on the target object information and the position information to move the bobbin a first movement amount in a first direction parallel to the optical axis, thereby performing an autofocus function.

[0026] The target object information may include at least one selected from the group consisting of a distance between the target object and at least one lens, a distance of the target object, and a phase of the target object.

[0027] The focus controller may include: an information receiving unit for receiving target object information; a bobbin position retrieval unit for retrieving the position of a bobbin with a correct focus corresponding to the received target object information; and a movement amount adjustment unit for moving the bobbin by a first movement amount to the retrieved position.

[0028] The bobbin position retrieval unit may include a lookup table for storing the position of the bobbin with the correct focal length corresponding to the target object information in a mapped state, and a data extraction unit for extracting the position of the bobbin with the correct focal length corresponding to the received target object information from the lookup table.

[0029] The lookup table may encode and store the position of the bobbin.

[0030] The lookup table may be established by using the position sensing unit before the bobbin is moved by the first movement amount.

[0031] After moving the bobbin by the first movement amount, the focus controller may move the bobbin within a range of a second movement amount smaller than the first movement amount to find a bobbin final focus position having a maximum modulation transfer function value.

[0032] The focus controller may move the bobbin for a predetermined period of time or a predetermined number of times in order to find a maximum modulation transfer function value.

[0033] The camera module may further include a second coil opposite to the driving magnet, and the bobbin may be moved in a second direction and a third direction perpendicular to the first direction by interaction between the second coil and the driving magnet.

[0034] The camera module may further include an image sensor for outputting the target object information to the focus controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Arrangements and embodiments are described in detail with reference to the following drawings, in which like reference numerals refer to like elements, and in which:

[0036] Figure 1 is a perspective view schematically showing a lens moving device according to an embodiment;

[0037] Figure 2 is a schematic diagram showing the Figure 1 An exploded perspective view of an embodiment of the lens shifting device is shown;

[0038] Figure 3 is a diagram schematically showing an embodiment of a lens shifting device. Figure 1a perspective view of the covered jar shown;

[0039] Figure 4 is a plan perspective view schematically showing a housing member according to an embodiment;

[0040] Figure 5 is a bottom perspective view schematically showing a housing member according to an embodiment;

[0041] Figure 6 is an exploded perspective view schematically showing a driving magnet, a housing member, a first circuit board, and a displacement sensing unit according to an embodiment;

[0042] Figure 7 is a plan perspective view showing an upper elastic member according to an embodiment;

[0043] Figure 8 is a plan perspective view showing a lower elastic member according to an embodiment;

[0044] Figure 9 When viewed in the positive x-axis direction, Figure 1 A cross-sectional view taken along line II′;

[0045] Figure 10 It shows Figure 9 An enlarged cross-sectional view of part "A" of FIG.

[0046] Figure 11 It shows that when the Figure 1 A perspective view of a portion of the lower left portion of the lens shifting device taken along line II-II′;

[0047] Figure 12 is a perspective view schematically showing a lens moving device equipped with a lens according to another embodiment;

[0048] Figure 13 It shows Figure 2 a plan perspective view of an embodiment of the bobbin shown;

[0049] Figure 14 It shows Figure 2 a bottom perspective view of an embodiment of the thread spool shown;

[0050] Figure 15 is an exploded perspective view showing a bobbin, a first coil, a displacement sensing unit, and a sensing magnet according to an embodiment;

[0051] Figure 16 is a bottom perspective view showing a bobbin, a first coil, first and second driving magnets, a displacement sensing unit, and a sensing magnet according to an embodiment;

[0052] Figure 17is a flow chart showing a focus controller of a camera module performing an auto-focus function according to another embodiment;

[0053] Figure 18 is a block diagram illustrating a focus controller according to an embodiment;

[0054] Figure 19 (a) and Figure 19 (b) is a graph showing an autofocus function according to a comparative example;

[0055] Figure 20 (a) and Figure 20 (b) is a diagram illustrating an autofocus function according to an embodiment; and

[0056] Figure 21 (a) and Figure 21 (b) is a graph showing fine adjustment of the autofocus function according to the embodiment. DETAILED DESCRIPTION

[0057] The embodiments will now be described with reference to the accompanying drawings so that those skilled in the art can easily implement these embodiments. In the figures, identical or similar elements are represented by the same reference numerals, even if they are described in different figures. In addition, in the following description of the present embodiment, when the well-known functions and configurations incorporated herein would make the subject matter of the present invention quite unclear, detailed descriptions of these well-known functions and configurations will be omitted. For ease of description, some features of the drawings are enlarged, reduced or simplified, and the drawings and their components are not necessarily shown in appropriate proportions, which will be readily understood by those skilled in the art.

[0058] In the following, the Cartesian coordinate system (x, y, z) will be used to describe Figures 1 to 16 Embodiments. However, the present disclosure is not limited thereto. That is, other coordinate systems may be used. In the figure, the x-axis direction and the y-axis direction are directions perpendicular to the z-axis direction, and the z-axis direction is the optical axis direction. For convenience, the z-axis direction may be referred to as the first direction, the x-axis direction may be referred to as the second direction, and the y-axis direction may be referred to as the third direction.

[0059] Lens shifter

[0060] Lens moving device according to an embodiment

[0061] Figure 1 is a perspective view schematically showing a lens moving device 100A according to the embodiment, Figure 2 is a schematic diagram showing the Figure 1 An exploded perspective view of an embodiment of the lens moving device 100A is shown; Figure 3 The embodiment of the lens moving device 100A is schematically shown. Figure 1 A perspective view of the lid jar 102a is shown.

[0062] The lens moving device 100A according to the embodiment is a device for adjusting the distance between the lens (not shown) and the image sensor (not shown) of the camera module so that the image sensor is located at the focal length of the lens. In other words, the lens moving device 100A is a device for performing an autofocus function.

[0063] like Figures 1 to 3 As shown, the lens moving device 100A according to the embodiment may include a cover can 102a, a bobbin 110, a first coil 120, a driving magnet 130, a shell member 140, an upper elastic member 150, a lower elastic member 160, a first circuit board 170, a displacement sensing unit (or position sensing unit or displacement sensor) 180, a sensing magnet 182 and a base 190a.

[0064] The cover jar 102a can generally be formed in a box shape. The cover jar 102a can be installed on, embedded in, in contact with, fixed to, temporarily fixed to, supported by, coupled to, or located on the upper portion of the base 190a. The bobbin 110, the first coil 120, the driving magnet 130, the housing member 140, the upper elastic member 150, the lower elastic member 160, the first circuit board 170, the displacement sensing unit 180, and the sensing magnet 182 can be accommodated in a receiving space formed when the cover jar 102a is installed on, embedded in, in contact with, fixed to, temporarily fixed to, supported by, coupled to, or located on the base 190a.

[0065] The upper surface of the cover can 102a may be provided with an opening 101 through which a lens (not shown) coupled to the bobbin 110 is exposed to external light. In addition, a window made of a light-transmitting material may be provided in the opening 101 to prevent foreign matter such as dust or moisture from penetrating into the camera module.

[0066] The cover pot 102a may include a first recess 104 formed in a lower portion thereof, and the base 190a may include a second recess 192 formed in an upper portion thereof. When the cover pot 102a is mounted on, embedded in, in contact with, fixed to, temporarily fixed to, supported on, coupled to, or located on the base 190a, the second recess 192 may be formed in a portion of the base 190a that contacts the first recess 104 (i.e., a position of the base 190a corresponding to the first recess 104). A concave recess having a constant space may be formed by contact, arrangement, or coupling between the first recess 104 and the second recess 192, as will be described below. A viscous adhesive, such as epoxy resin, may be injected and applied to the concave recess. The adhesive applied to the recessed portion can fill the gap between the opposing surfaces of the cover can 102a and the base 190a to provide a seal between the cover can 102a and the base 190a in a state in which the cover can 102a can be mounted on, embedded in, in contact with, fixed to, temporarily fixed to, supported on, coupled to, or located on the base 190a. In addition, the sides of the cover can 102a and the base 190a can be sealed or coupled in a state in which the cover can 102a can be mounted on, embedded in, in contact with, fixed to, temporarily fixed to, supported on, coupled to, or located on the base 190a.

[0067] In addition, the cover can 102a may further include a third recess 106. The third recess 106 is formed on the surface of the cover can 102a corresponding to the terminal surface of the first circuit board 170 so that the cover can 102a does not interfere with the plurality of terminals 171 formed on the terminal surface of the first circuit board 170. The third recess 106 may be formed in a recessed state over the entire surface of the cover can 102a opposite the terminal surface of the first circuit board 170. An adhesive may be applied to the inside of the third recess 106 to seal or couple the cover can 102a, the base 190a, and the first circuit board 170.

[0068] The first and third recesses 104, 106 are formed in the lid jar 102a, and the second recess 192 is formed in the base 190a. However, the present disclosure is not limited thereto. That is, according to another embodiment, the first to third recesses 104, 192, and 106 may be formed only in the base 190a. Alternatively, the first to third recesses 104, 192, and 106 may be formed only in the lid jar 102a.

[0069] In addition, the cover can 102a is made of metal. However, the present disclosure is not limited thereto. In addition, the cover can 102a may be made of a magnetic material.

[0070] The entire base 190a is formed in a quadrilateral shape. The base 190a may include a step extending outward with a predetermined thickness to surround the lower edge of the base 190a. The step may be formed in the shape of a continuous band or a discontinuous band. The predetermined thickness of the step may be equal to the thickness of the side of the cover can 102a. When the cover can 102a is installed on, embedded in, in contact with, fixed to, temporarily fixed to, supported on, coupled to, or located on the base 190a, the side of the cover can 102a may be installed on, embedded in, in contact with, coupled to, fixed to, supported on, or located on the upper part or side of the step. Therefore, the step can guide the cover can 102a coupled to the upper side of the step. In addition, the distal end of the cover can 102a may be coupled to the step in a surface-contact manner. The distal end of the cover can 102a may include a lower surface or a side. The step and the distal end of the cover can 102a may be fixed by an adhesive, or may be coupled or sealed.

[0071] The second recess 192 may be formed at a stepped position corresponding to the first recess 104 of the cover can 102a. As described above, the second recess 192 may be coupled to the first recess 103 of the cover can 102a to form a recessed recess that is a space filled with adhesive.

[0072] In the same manner as the cover can 102a, the base 190a may include an opening formed around the center thereof. The opening may be formed at a position of the base 190a corresponding to a position of an image sensor provided in the camera module.

[0073] In addition, the base 190a may include four guide members 194 extending vertically upward from its four corners to a predetermined height. The guide members 194 may be formed in a polygonal prism shape. The guide members 194 may be mounted on, inserted into, embedded in, contacted with, coupled to, fixed to, supported on, or located at the lower guide recess 148 of the housing member 140, which will be described below. When the housing member 140 is mounted on, embedded in, contacted with, coupled to, fixed to, supported on, or located at the upper portion of the base 190a, Figure 4 The guide member 194 and the lower guide recess 148 shown can guide the coupling position of the housing member 140 on the base 190a, which will be described below. In addition, the coupling area between the housing member 140 and the base 190a can be increased. In addition, the housing member 140 is prevented from deviating from the reference position for correctly mounting the housing member 140 due to vibration during operation of the lens moving device 100A or due to worker errors during coupling of the lens moving device 100A.

[0074] Figure 4 is a plan perspective view schematically showing a housing member 140 according to an embodiment; Figure 5 is a bottom perspective view schematically showing a housing member 140 according to an embodiment; Figure 6is an exploded perspective view schematically illustrating a driving magnet 130 , a housing member 140 , a first circuit board 170 , and a displacement sensing unit 180 according to an embodiment; Figure 7 is a plan perspective view showing an upper elastic member 150 according to an embodiment; and Figure 8 is a plan perspective view illustrating the lower elastic member 160 according to an embodiment.

[0075] See also Figures 4 to 6 The entire housing member 140 may be formed in a hollow prism shape (e.g., a hollow quadrangular prism as shown). The housing member 140 may have a shape for supporting at least two drive magnets 130 and the first circuit board 170. The bobbin 110 may be accommodated in the housing member 140 so that the bobbin 110 can move relative to the housing member 140 in a first direction, i.e., the z-axis direction.

[0076] The housing member 140 may include four flat side surfaces 141. The area of the side surfaces 141 of the housing member 140 may be equal to or greater than the area of the driving magnet 130.

[0077] like Figure 6 As shown, each of the first opposing sides selected from the four side faces 141 of the housing member 140 may be provided with a magnet through hole 141a (or recess), and the driving magnet 130 is mounted on, inserted into, embedded in, in contact with, coupled to, fixed to, supported on or located at the magnet through hole. The magnet through hole 141a may have a size and / or shape corresponding to the driving magnet 130. In addition, the magnet through hole 141a may have a shape capable of guiding the driving magnet 130. One of the driving magnets 130 (hereinafter referred to as "the first driving magnet 131") and the other of the driving magnets 130 (hereinafter referred to as "the second driving magnet 132") may be mounted on, inserted into, embedded in, in contact with, coupled to, fixed to, supported on or located at the first magnet through hole 141a and the second magnet through hole 141a', respectively. In this embodiment, only two driving magnets 130 are shown. However, the present disclosure is not limited to this. That is, four driving magnets 130 may be provided.

[0078] The driving magnet 130 may be classified as a ferrous magnet, an alnico magnet, or a rare earth magnet. Furthermore, the driving magnet 130 may be classified as a P-type magnet or an F-type magnet. However, the present disclosure is not limited thereto.

[0079] A side surface perpendicular to the first relative side surface or a side surface other than the first relative side surface selected from the four side surfaces 141 of the housing member 140 may be provided with a sensor through hole (or positioning through hole) 141b or a recess (not shown), and the displacement sensing unit 180 is mounted on, inserted into, embedded in, in contact with, coupled to, fixed to, supported on or located at the sensor through hole or recess, which will be described below. The sensor through hole 141b may have a size and shape corresponding to the displacement sensing unit 180, which will be described below. The sensor through hole 141b may be spaced apart from the first magnet through hole 141a and the second magnet through hole 141a' by a predetermined distance. The sensor through hole 141b may be formed on the following side surface selected from the four side surfaces 141 of the housing member 140: the side surface on which the first circuit board 170 is mounted, embedded in, in contact with, fixed to, temporarily fixed to, supported on, coupled to or located.

[0080] In addition, one side of the shell member 140 can be provided with at least one mounting protrusion 149, and the first circuit board 170 is mounted on, embedded in, contacted, coupled to, fixed to, temporarily fixed to, supported on or located on the shell member 140 through the at least one mounting protrusion.

[0081] The mounting protrusion 149 can be mounted on, inserted into, embedded in, contacted with, coupled to, fixed to, temporarily fixed to, supported by, or located on a mounting through-hole 173 formed in the first circuit board 170. The mounting through-hole 173 and the mounting protrusion 149 can contact or couple with each other in a form-fitting manner or a press-fitting manner. The mounting through-hole 173 and the mounting protrusion 149 can easily guide the first circuit board 170 and the housing member 140 so that the first circuit board 170 is mounted on, embedded in, contacted with, coupled to, fixed to, temporarily fixed to, supported by, or located on the housing member 140.

[0082] Another side surface opposite to one side surface selected from the four side surfaces 141 of the housing member 140 may be flat. However, the present disclosure is not limited thereto.

[0083] Although not shown in the drawings, third and fourth magnet through holes may be further provided on second opposing sides perpendicular to the first opposing sides of the housing member 140 .

[0084] The first magnet through hole 141a and the second magnet through hole 141a' can have the same size and the same shape. In addition, the first magnet through hole 141a and the second magnet through hole 141a' can have almost the same lateral length in the lateral direction of the first opposite side of the housing member 140. On the other hand, the third magnet through hole and the fourth magnet through hole can have the same size and shape, while the third magnet through hole and the fourth magnet through hole can have a shorter lateral length than the first magnet through hole 141a and the second magnet through hole 141a'. This is because it is necessary to ensure space for the sensor through hole 141b because the sensor through hole 141b is formed on one of the second opposite sides where the third or fourth magnet through hole is formed.

[0085] As described above, the first drive magnet 131 and the second drive magnet 132 can have the same size and shape. In addition, the first drive magnet 131 and the second drive magnet 132 can have almost the same lateral length on the side of the first opposite side of the housing member 140. The third and fourth drive magnets (not shown) respectively mounted on, inserted into, embedded in, in contact with, coupled to, fixed to, temporarily fixed to, supported on or located in the third and fourth magnet through holes (not shown) can have the same size and shape. In addition, the third and fourth magnets can have a shorter lateral length than the first drive magnet 131 and the second drive magnet 132.

[0086] In the same manner as the first magnet through hole 141a and the second magnet through hole 141a', the third and fourth magnet through holes may be disposed in linear symmetry with respect to the center of the housing member 140. That is, the third and fourth driving magnets (not shown) may be disposed according to the center of the housing member 140, or in linear symmetry with respect to the center of the housing member 140.

[0087] If the first and second drive magnets 131 and 132, or the third and fourth drive magnets, are positioned relative to each other in a state offset from one side of the housing member 140, regardless of the center of the housing member 140, an electromagnetic force is applied to one side of the first coil 120 of the bobbin 110 in an offset state, thereby tilting the bobbin 110. In other words, if the third and fourth drive magnets are linearly symmetrical with respect to the center of the housing member 140 in the same manner as the first and second drive magnets 131 and 132, an electromagnetic force that does not deviate from the first coil 120 and the bobbin 110 is applied, thereby enabling easy and accurate guidance of the movement of the bobbin 110 in the first direction.

[0088] Hereinafter, for convenience of description, it is assumed that the lens moving device 100A according to the embodiment includes only the first driving magnet 131 and the second driving magnet 132. However, the following description is also applicable to a case where the lens moving device 100A further includes third and fourth driving magnets.

[0089] A plurality of first stoppers 143 may be formed in a convex state on the upper surface of the shell member 140. The first stoppers 143 are configured to prevent the cover pot 102a from colliding with the main body of the shell member 140. When an external impact occurs, the first stoppers 143 may prevent the upper surface of the shell member 140 from directly colliding with the inner surface of the upper portion of the cover pot 102a. In addition, the first stoppers 143 may also be used to guide the installation position of the upper elastic member 150. For example, see Figure 3 and Figure 7 , the upper elastic member 150 may be provided with a guide recess 155 having a shape corresponding to the first stopper 143 at a position corresponding to the first stopper 143 .

[0090] In addition, the outer frame 152 of the upper elastic member 150 is inserted into, embedded in, in contact with, fixed to, temporarily fixed to, coupled to, supported by, or located at a plurality of upper frame support protrusions 144, which may be formed in a raised state on the upper side of the outer shell member 140. First through-holes (or recesses) 152a having a shape corresponding to the upper frame support protrusions 144 may be formed on the outer frame 152 of the upper elastic member 150. After the upper frame support protrusions 144 are inserted into, embedded in, in contact with, fixed to, temporarily fixed to, coupled to, supported by, or located at the first through-holes 152a, the upper frame support protrusions 144 may be fixed using an adhesive or by welding. Welding may include heat welding or ultrasonic welding.

[0091] In addition, a plurality of lower frame support protrusions 147 coupled to the outer frame 162 of the lower elastic member 160 may be formed in a protruding state on the lower side of the housing member 140. The lower frame support protrusions 147 may be formed at four different corners of the lower side of the housing member 140. Figure 8 The coupling portion 162a that can be installed on, inserted into, embedded in, contacted with, coupled to, fixed to, temporarily fixed to, supported by, or located on the lower frame support protrusion 147 can be formed at a position of the outer frame 162 of the lower elastic member 160 corresponding to the lower frame support protrusion 147. The coupling portion 162a can be fixed using an adhesive or welding. The welding can include heat welding or ultrasonic welding.

[0092] In addition, the housing member 140 may be a yoke housing member having a yoke function. The yoke housing member may be configured to have a structure in which the upper elastic member 150 is spaced apart from the inner surface of the upper surface of the yoke so that the bobbin 110 moves upward without interfering with the yoke.

[0093] Alternatively, the yoke (not shown) itself may have the same function as the housing member 140. In this case, the yoke may be coupled to the base 190a, and the upper elastic member 150 may be located at a lower portion of the yoke or in the yoke.

[0094] In another embodiment, an additional cover can be further located on the yoke upper portion. In this case, the upper elastic member 150 can be located on the yoke upper portion or between the yoke and the cover. In addition, the upper elastic member 150 can be coupled to the cover or the yoke.

[0095] At the same time, the driving magnet 130 (131 and 132) can be fixed to the magnet through holes 141a and 141a' using an adhesive. However, the present disclosure is not limited to this. An adhesive member such as a double-sided tape can be used. In a modified form, a recessed concave magnetic base portion (not shown) can be formed in the inner surface of the housing member 140, instead of being formed in the first magnet through hole 141a and the second magnet through hole 141a', which is different from the illustration. The magnetic base portion can have a size and shape corresponding to the driving magnet 130.

[0096] The driving magnet 130 can be installed in a position facing the first coil 120 located on the outer peripheral surface of the bobbin 110. In addition, the driving magnet 130 can be configured separately, as shown in the figure. Alternatively, the driving magnet 130 can be integrated, which is different from the figure. In an embodiment, the driving magnet 130 can be arranged so that the inner surface of each driving magnet 130 facing the first coil 120 of the bobbin 110 has an N pole, and the outer surface of each driving magnet 130 has an S pole. However, the present disclosure is not limited to this. The driving magnet 130 can be arranged so that the inner surface of each driving magnet 130 facing the first coil 120 of the bobbin 110 has an S pole, and the outer surface of each driving magnet 130 has an N pole.

[0097] In addition, the driving magnet 130 can be divided into two parts on a plane perpendicular to the optical axis. That is, the driving magnet 130 can be a two-pole magnetized magnet, which includes a first magnet (not shown) and a second magnet (not shown) that are opposite to each other on a plane perpendicular to the optical axis with a non-magnetic separator set in between. The non-magnetic separator can be air or a non-magnetic material. The first magnet and the second magnet can be arranged to have opposite polarities. However, the present disclosure is not limited to this. The first magnet and the second magnet can have various shapes.

[0098] The first drive magnet 131 and the second drive magnet 132 can be configured into a parallelepiped shape of a predetermined width. The first drive magnet 131 and the second drive magnet 132 can be respectively embedded in the first magnet through hole 141a and the second magnet through hole 141a', so that the large surface or part of the surface of the first drive magnet 131 and the second drive magnet 132 form a part of the side surface (outer surface or inner surface) of the shell member 140. In addition, the first drive magnet 131 and the second drive magnet 132 can be located on the side of the shell member 140 and, at the same time, can be located or coupled to the inner surface of the aforementioned yoke. Alternatively, in the absence of the shell member 140, the first drive magnet 131 and the second drive magnet 132 can be coupled to or fixed to the inner surface of the yoke. In this case, the first drive magnet 131 and the second drive magnet 132 relative to each other can be installed parallel to each other. In addition, the surface of each of the drive magnet 130 and the first coil 120 of the bobbin 110 relative to each other can be flat so that their relative surfaces are parallel to each other. However, the present disclosure is not limited thereto. One surface of the driving magnet 130 and the first coil 120 of the bobbin 110 may be flat, and the other surface of the driving magnet 130 and the first coil 120 of the bobbin 110 may be curved. Alternatively, the surfaces of the driving magnet 130 and the first coil 120 of the bobbin 110 that are opposite to each other may both be curved. In this case, the surfaces of the driving magnet 130 and the first coil 120 of the bobbin 110 that are opposite to each other may have the same curvature.

[0099] Furthermore, as described above, the sensor through-hole 141b or recess can be provided on one side of the housing member 140, and the displacement sensing unit 180 can be mounted on, inserted into, embedded in, in contact with, coupled to, fixed to, temporarily fixed to, supported by, or located in the sensor through-hole 141b or recess. The displacement sensing unit 180 can be electrically connected to one surface of the first circuit board 170 by soldering. In other words, the first circuit board 170 can be mounted on, inserted into, embedded in, in contact with, coupled to, fixed to, temporarily fixed to, supported by, or located in the outer surface of a side selected from the four side surfaces 141 of the housing member 140 where the sensor through-hole 141b or recess is provided.

[0100] The displacement sensing unit 180 can sense / determine a first displacement value of the bobbin 110 in a first direction together with the sensing magnet 182, as described below. The first displacement value in the first direction can represent the position of the bobbin 110 in the first direction. To this end, the displacement sensing unit 180 and the sensor through hole 141b or recess can be located at positions corresponding to the sensing magnet 182. Unlike the illustrated embodiment, the sensing magnet 182 can be divided into an upper portion and a lower portion to increase the strength of the magnetic field. However, the present disclosure is not limited to this.

[0101] The displacement sensing unit 180 may be a sensor for sensing changes in the magnetic force emitted by the sensing magnet 182 of the bobbin 110. For example, the displacement sensing unit 180 may be a Hall effect sensor. However, the present disclosure is not limited to this. In another embodiment, any sensor capable of sensing changes in magnetic force, as well as a Hall effect sensor, may be used as the displacement sensing unit 180. Alternatively, any sensor for sensing both position and magnetic force may be used as the displacement sensing unit 180. For example, a light reflector may be used. If the displacement sensing unit 180 is implemented as a Hall effect sensor, the actuator drive distance may be further calibrated based on the Hall effect voltage difference resulting from the change in magnetic flux sensed by the Hall effect sensor. For example, if the displacement sensing unit 180 is implemented as a Hall effect sensor, the Hall effect sensor may have multiple pins. For example, the pins may include a first pin and a second pin. The first pin may include pins 1-1 and 1-2, connected to a voltage and ground, respectively. The second pin may include pins 2-1 and 2-2, for outputting the sensing result. The sensing result output by pins 2-1 and 2-2 may be a current. However, the present disclosure is not limited to this. The first circuit board 170 is connected to the Hall sensor 180 to supply power to the 1-1 and 1-2 pins and receive signals from the 2-1 and 2-2 pins.

[0102] The first circuit board 170 can be mounted on, inserted into, embedded in, contacted with, coupled to, fixed to, temporarily fixed to, supported by, or located on one side of the housing member 140. In this case, the mounting position of the first circuit board 170 can be guided by the mounting protrusion 149 formed on one side of the housing member 140, as described above. A single mounting protrusion 149 can be formed. Alternatively, a plurality of mounting protrusions 149 can be formed. When two or more mounting protrusions 149 are formed, the mounting position of the first circuit board 170 can be more easily guided.

[0103] A plurality of terminals 171 may be located on the first circuit board 170 for receiving external power and supplying current required by the first coil 120 of the bobbin 110 and the displacement sensing unit 180. The number of terminals 171 formed on the first circuit board 170 may be adjusted according to the type of component to be controlled. For example, the terminals 171 of the first circuit board 170 may include power terminals 171b and 171c for receiving external power and I 2 C communication terminals 171d and 171e. The power terminal 171b may be a terminal connected to a power supply voltage, and the power terminal 171c may be a terminal connected to a ground terminal.

[0104] In addition, see Figure 3 and Figure 6The first circuit board 170 may be provided with at least one pin 171. Although four pins 172 are shown, the number of pins 172 may be greater than or less than four. For example, the four pins 171 may be a test pin, a via pin, a VCM+ pin, and a VCM- pin. However, the present disclosure is not limited thereto. The test pin may be used to evaluate the performance of the lens moving device 100A. The via pin may be used to extract data output by the displacement sensor 180. In the absence of feedback from the displacement sensor 180, the VCM+ pin and the VCM- pin may be used to evaluate the performance of the lens moving device 100A.

[0105] In an embodiment, the first circuit board 170 may be a flexible printed circuit board (FPCB). The first circuit board 170 may include a controller (not shown) for adjusting the amount of current applied to the first coil 120 based on the first displacement value sensed by the displacement sensing unit 180. For example, the controller may receive signals from pins 2-1 and 2-2 of the Hall sensor 180. The controller may be mounted on the first circuit board 170. In another embodiment, the controller may not be mounted on the first circuit board 170, but may be mounted on another circuit board. The other circuit board may be a second circuit board (not shown) in the camera module on which an image sensor (not shown) is mounted, or another circuit board.

[0106] In the above-described example, the lens moving device 100A includes the displacement sensing unit 180. However, depending on circumstances, the displacement sensing unit 180 may be omitted.

[0107] Furthermore, in the above example, the first circuit board 170 is mounted on, inserted into, embedded in, in contact with, coupled to, fixed to, temporarily fixed to, supported on, or located on the outer surface of the housing member 140. However, the present disclosure is not limited thereto. That is, in another embodiment, if the lens moving device 100A does not include the displacement sensing unit 180, the first circuit board 170 may be located below the housing member 140 rather than on the outer surface of the housing member 140.

[0108] At the same time, to shield electromagnetic interference (EMI), the cover can 102a can be electrically connected to a second circuit board on which the image sensor is mounted. EMI can include electromagnetic noise generated by the first coil 120 or the Hall sensor implemented as the displacement sensing unit 180. Various components of the lens moving device 100A may malfunction or be damaged due to EMI. Therefore, to shield EMI, the cover can 102a can be electrically connected to the second circuit board. When the cover can 102a is electrically connected to the second circuit board, the cover can 102a and the second circuit board are grounded, thereby shielding EMI.

[0109] In an embodiment, the cover can 102a may be a yoke cover can having a yoke function. In addition, the cover can 102a may be made of SUS material, magnetic material, or metal material. However, the present disclosure is not limited thereto. The cover can 102a may be made of any material that exhibits electrical conductivity.

[0110] In another embodiment, the lens moving device 100A may further include a cover (not shown). The cover may be covered by the cover can 102a and may secure and support the bobbin 110. The driving magnet 130 may be mounted on, inserted into, embedded in, in contact with, coupled to, secured to, temporarily secured to, supported by, or located on the inner side of the cover. In this case, the cover may be electrically connected to the second circuit board instead of the cover can 102a, or may be electrically connected to both the second circuit board and the cover can 102a to shield EMI.

[0111] Furthermore, in an embodiment, the cover can 102a or the cover can be electrically connected to the second circuit board using the first circuit board 170. To this end, as shown in FIG. Figure 3 As shown, the terminals 171 of the first circuit board 170 may further include EMI shielding terminals 171 a. The EMI shielding terminals 171 a connect the cover can 102 a and the second circuit board.

[0112] Figure 9 When viewed along the positive (+) x-axis Figure 1 The cross-sectional view taken along line II' is as follows: Figure 10 It shows Figure 9 An enlarged cross-sectional view of section "A" of Figure 11 It shows that when the Figure 1 Reference numeral 171 a - 4 denotes a main body of the first circuit board 170 .

[0113] See also Figures 9 to 11 , the EMI shielding terminal 171a may include an upper terminal portion 171a-1 and a lower terminal portion 171a-2. The upper terminal portion 171a-1 may be electrically connected to the cover can 102a or the cover (not shown). For example, see Figure 10 , the inner surface 102a-1 of the cover can 102a or the inner surface of the cover (not shown) can be electrically connected to the outer surface of the upper terminal portion 171a-1 by soldering, conductive epoxy or welding. For example, see Figure 10 The distance between the inner surface 102a-1 of the cover can 102a and the outer surface of the upper terminal portion 171a-1 may be 0.15 mm or less, making it easy to perform soldering. However, the present disclosure is not limited thereto.

[0114] The lower terminal portion 171a-2 may be electrically connected to the second circuit board and the upper terminal portion 171a-1. At this time, the lower terminal portion 171a-2 may be electrically connected to the second circuit board by soldering, conductive epoxy, or welding.

[0115] In addition, in an embodiment, the EMI shielding terminal 171a may further include an intermediate terminal portion 171a-3. The intermediate terminal portion 171a-3 is located between the upper terminal portion 171a-1 and the lower terminal portion 171a-2 and is used to electrically interconnect the upper terminal portion 171a-1 and the lower terminal portion 171a-2. Although the upper terminal portion 171a-1, the intermediate terminal portion 171a-2, and the lower terminal portion 171a-3 are shown as being integrally formed, the upper terminal portion 171a-1, the intermediate terminal portion 171a-2, and the lower terminal portion 171a-3 may also be formed separately.

[0116] For example, the EMI shielding terminal 171a may be gold-plated so that the EMI shielding terminal 171a is electrically and effectively connected to the second circuit board. However, the present disclosure is not limited thereto.

[0117] Lens moving device according to another embodiment

[0118] Figure 12 100B is a perspective view schematically showing a lens moving device 100B equipped with a lens L according to another embodiment.

[0119] Figure 12 The lens moving device 100B shown is different from the one shown in FIG. Figure 1 The lens shifting device 100A is shown. Figure 1 The lens moving device 100A shown includes a displacement sensing unit 180. Figure 12 The lens moving device 100B shown does not include the displacement sensing unit 180. In addition to these differences, Figure 12 The internal structure of the lens moving device 100B shown can be Figures 1 to 11 The lens shifting device 100A shown is identical. Figure 12 The VCM terminal 109 shown may correspond to Figure 1 Terminals for supplying current to the first coil 120 in the lens moving device 100A are shown.

[0120] In the following, for the convenience of description, Figure 12 The lens shifting device 100B shown is Figures 1 to 11 The differences between the lens shifting device 100A shown are described Figure 12 The lens moving device 100B is shown. However, the present disclosure is not limited thereto.

[0121] In another embodiment, the cover can 102a and the second circuit board can be connected to each other without using the EMI shielding terminal 171a of the first circuit board 170. Figure 12 As shown, the cover can 102b may include at least one can protrusion 108, and the base 190b may include a protrusion recess 190b-1. The at least one can protrusion 108 may extend in a first direction (i.e., -z direction) parallel to the optical axis, so that the at least one can protrusion 108 is electrically connected to the second circuit board. Figure 12 As shown, one pot protrusion 108 may be provided on each side of the lens moving device 100B, thereby providing a plurality of pot protrusions 108. However, the present disclosure is not limited thereto. Although not shown, at least one pot protrusion 108 may be electrically connected to the second circuit board by soldering, conductive epoxy, or welding.

[0122] The tank protrusion 108 may be inserted into, penetrated through, located at, or installed in a protrusion recess 190b-1 formed on the base 190b.

[0123] In other embodiments, the lid jar 102a or 102b or the lid (not shown) may be formed by Figures 1 to 11 The first circuit board 170 is electrically connected to the second circuit board and can be connected to the second circuit board by Figure 12 The can protrusion 108 is shown electrically connected to the second circuit board.

[0124] Figure 13 It shows Figure 2 A plan perspective view of an embodiment of the bobbin 110 is shown, and Figure 14 It shows Figure 2 A bottom perspective view of an embodiment of the bobbin 110 is shown.

[0125] See also Figure 4 、 5 , 7, 8, 13 and 14, the upper elastic member 150 and the lower elastic member 160 can elastically support the upward movement and / or downward movement of the bobbin 110. The upper elastic member 150 and the lower elastic member 160 can both be leaf springs. However, the present disclosure is not limited thereto.

[0126] The upper elastic member 150 may include an inner frame 151 coupled to the bobbin 110 , an outer frame 152 coupled to the housing member 140 , and a connection portion 153 connecting the inner frame 151 and the outer frame 152 .

[0127] In addition, the lower elastic member 160 may include an inner frame 161 coupled to the bobbin 110 , an outer frame 162 coupled to the housing member 140 , and a connection portion 163 connecting the inner frame 161 and the outer frame 162 .

[0128] The connecting portions 153 and 163 may be bent at least once to form a predetermined pattern. By changing the positions and slightly deforming the connecting portions 153 and 163, the bobbin 110 may be flexibly (or elastically) supported to move upward and / or downward in the optical axis direction (i.e., in the first direction).

[0129] In an embodiment, Figure 7 As shown, the upper elastic member 150 may include a plurality of first through-holes 152 a formed on the outer frame 152 and a plurality of second through-holes 151 a formed on the inner frame 151 .

[0130] The first through-hole 152a can be coupled to the upper frame support protrusion 144 formed on the upper surface of the housing member 140, and the second through-hole 151a can be coupled to the upper support protrusion 113 formed on the upper surface of the bobbin 110. The upper support protrusion 113 will be described in detail below. That is, the outer frame 152 can be mounted on, embedded in, in contact with, fixed to, temporarily fixed to, supported, located on, or coupled to the housing member 140 through the first through-hole 152a, and the inner frame 151 can be mounted on, embedded in, in contact with, fixed to, temporarily fixed to, supported, located on, or coupled to the bobbin 110 through the second through-hole 151a.

[0131] The connection portion 153 of the upper elastic member 150 may be connected between the inner frame 151 and the outer frame 152 so that the inner frame 151 may be elastically deformed within a predetermined range in a first direction with respect to the outer frame 152 .

[0132] At least one selected from the inner frame 151 and the outer frame 152 of the upper elastic member 150 may include at least one terminal portion electrically connected to at least one selected from the coil 120 of the bobbin 110 and the first circuit board 170 .

[0133] like Figure 8 As shown in , the lower elastic member 160 may include a plurality of coupling portions 162 a formed on the outer frame 162 and a plurality of third through holes (or recesses) 161 a formed on the inner frame 161 .

[0134] As described above, the coupling portion 162a may be mounted on, inserted into, embedded in, contacted with, coupled to, fixed to, temporarily fixed to, supported on, or located on the lower surface of the housing member 140, and the third through hole 161a may be connected to, coupled to, fixed to, or temporarily fixed to a portion formed on the housing member 140. Figure 14The lower support protrusion 114 on the lower surface of the bobbin 110 is shown. That is, the outer frame 162 can be installed on, inserted into, embedded in, contacted with, coupled to, fixed to, temporarily fixed to, supported on, or located on the housing member 140 through the coupling portion 162a, and the inner frame 161 can be installed on, inserted into, embedded in, contacted with, coupled to, fixed to, temporarily fixed to, supported on, or located on the bobbin 110 through the third through hole 161a.

[0135] The connection portion 163 of the lower elastic member 160 may be connected between the inner frame 161 and the outer frame 162 so that the inner frame 161 may be elastically deformed within a predetermined range in a first direction with respect to the outer frame 162 .

[0136] The lower elastic member 160 may include a first lower elastic member 160a and a second lower elastic member 160b separated from each other. In this two-part structure, power of different polarities or currents can be supplied to the first and second lower elastic members 160a, 160b of the lower elastic member 160. That is, after the inner frame 161 and the outer frame 162 are coupled to the bobbin 110 and the outer shell member 140, respectively, power of different polarities or currents can be supplied to the first and second lower elastic members 160a, 160b through a conductive connection, for example, a solder connection, through a soldering connection, which is provided at positions on the inner frame 161 corresponding to the ends of the first coil 120 located on the bobbin 110. In addition, the first lower elastic member 160a can be electrically connected to one of the ends of the first coil 120, and the second lower elastic member 160b can be electrically connected to the other end of the first coil 120, so that external current and / or voltage are supplied to the first and second lower elastic members 160a, 160b. To this end, at least one of the inner frame 161 and the outer frame 162 selected from the upper elastic member 160 may include at least one terminal portion electrically connected to at least one of the first coil 120 and the first circuit board 170 selected from the bobbin 110. Both ends of the first coil 120 may be disposed opposite to each other relative to the bobbin 110. Alternatively, both ends of the first coil 120 may be disposed adjacent to each other.

[0137] At the same time, the upper elastic member 150, the lower elastic member 160, the bobbin 110 and the housing member 140 can be assembled by heat welding and / or bonding using an adhesive. At this time, according to the assembly sequence, heat welding can be performed and then bonding using an adhesive can be performed to complete the fixing work.

[0138] In another embodiment, the upper elastic member 150 may be configured to have Figure 8 The two-part structure shown, and the lower elastic member 160 can be constructed as Figure 7 The one-piece structure shown.

[0139] Figure 15 is an exploded perspective view schematically showing the bobbin 110, the first coil 120, the displacement sensing unit 180, and the sensing magnet 182 according to the embodiment, and Figure 16 1 is a bottom perspective view illustrating the bobbin 110 , the first coil 120 , the first and second driving magnets 131 and 132 , the displacement sensing unit 180 , and the sensing magnet 182 according to an embodiment.

[0140] The bobbin 110 can be installed in the interior space of the housing member 140 so that the bobbin 110 can reciprocate in the optical axis direction. The first coil 120 can be installed on the outer circumference of the bobbin 110 so that the bobbin 110 can reciprocate in the optical axis direction (i.e., the first direction) through electromagnetic interaction between the first coil of the housing member 140 and the driving magnet 130.

[0141] Furthermore, the bobbin 110 may be flexibly (or elastically) supported by the upper elastic member 150 and the lower elastic member 160 such that the bobbin 110 performs an auto-focusing function in the optical axis direction (ie, the first direction).

[0142] Although not shown in the figure, at least one lens can be mounted on, inserted into, embedded in, contacted, coupled to, fixed to, temporarily fixed to, supported on or located on the inner side of the bobbin 110. For example, the bobbin 110 may include a lens barrel (not shown). The lens barrel is a component of the camera module, which will be described below. The lens barrel is not an indispensable component of the lens moving device. The lens barrel can be mounted on, inserted into, embedded in, contacted, coupled to, fixed to, temporarily fixed to, supported on or located on the inner side of the bobbin 110 in a variety of ways. For example, an internal thread can be formed on the inner circumference of the bobbin 110, and an external thread corresponding to the internal thread can be formed on the outer circumference of the lens barrel, so that the lens barrel is coupled to the bobbin 110 by threaded engagement between the two. However, the present disclosure is not limited thereto. The lens barrel can be directly fixed on the inner side of the bobbin 110 by using a method other than threaded engagement.

[0143] Alternatively, one or more lenses may be integrated with the bobbin 110 without a lens barrel. One lens may be connected to the lens barrel, or two or more lenses may be provided to constitute an optical system.

[0144] In addition, a plurality of upper supporting protrusions 113 and a plurality of lower supporting protrusions 114 may be formed in a protruding state on the upper surface and the lower surface of the bobbin 110, respectively. Figure 13As shown, the upper support protrusion 113 can be formed in a cylindrical or prismatic shape. The inner frame 151 of the upper elastic member 150 can be coupled to, fixed to, temporarily fixed to, connected to, or supported by the bobbin 110 via the upper support protrusion 113. Depending on the embodiment, a second through-hole 151a can be formed in the inner frame 151 of the upper elastic member 150 at a position corresponding to the upper support protrusion 113. In this case, the upper support protrusion 113 can be fixed to the second through-hole 151a by heat welding or using an adhesive member such as epoxy resin. Multiple upper support protrusions 113 can be provided. In this case, the distance between each upper support protrusion 113 can be appropriately set within a range that avoids interference with surrounding components. In other words, the upper support protrusions 113 can be spaced at regular intervals in a symmetrical state relative to the center of the bobbin 110. Alternatively, although the upper support protrusions 113 are not spaced at regular intervals, they can be arranged symmetrically relative to a specific imaginary light passing through the center of the bobbin 110.

[0145] like Figure 14 As shown, the lower support protrusion 114 may be formed in a cylindrical shape or a prismatic shape in the same manner as the upper support protrusion 113. The inner frame 161 of the lower elastic member 160 may be coupled to, fixed to, temporarily fixed to, connected to, or supported by the bobbin 110 through the lower support protrusion 114. According to an embodiment, a third through hole 161a may be formed at a position of the inner frame 161 of the lower elastic member 160 corresponding to the lower support protrusion 114. At this time, the lower support protrusion 114 may be fixed to the third through hole 161a by heat welding or using an adhesive member such as epoxy resin. Figure 14 As shown, a plurality of lower support protrusions 114 may be provided. In this case, the distance between each lower support protrusion 114 may be appropriately set within a range that avoids interference with surrounding components. In other words, the lower support protrusions 114 may be spaced at regular intervals in a symmetrical state relative to the center of the bobbin 110.

[0146] The upper and lower detachment recesses 112 and 118 may be formed at positions corresponding to the connection portions 153 and 163 of the upper and lower elastic members 150 and 160 , respectively, on the upper and lower surfaces of the bobbin 110 .

[0147] In the case where the upper and lower disengagement recesses 112 and 118 are provided, when the bobbin moves in the first direction relative to the housing member 140, a space gap between the connecting portions 153 and 163 and the bobbin 110 is avoided, thereby making it easier to achieve elastic deformation of the connecting portions 153 and 163. Figure 13 As shown, the upper detachment recess 112 may be located at a corner of the housing member 140. Alternatively, the upper detachment recess 112 may be located on a side of the housing member 140 depending on the shape and / or position of the connection portion of the elastic member.

[0148] In addition, the first coil 120 is installed on, inserted into, embedded in, in contact with, coupled to, fixed to, temporarily fixed to, supported on, or located at the coil seat recess 116, and the first coil 120 can be set on the outer peripheral surface of the bobbin 110. However, the present disclosure is not limited to this. That is, in another embodiment, instead of the first coil 120 being directly installed on, inserted into, embedded in, in contact with, coupled to, fixed to, temporarily fixed to, supported on, or located at the outer peripheral surface of the bobbin 110, a coil ring (not shown) having the same shape as the outer peripheral shape of the bobbin 110 can be installed on, inserted into, embedded in, in contact with, coupled to, fixed to, temporarily fixed to, supported on, or located adjacent to the outer peripheral surface of the bobbin 110, and the first coil 120 can be installed on, inserted into, embedded in, in contact with, coupled to, fixed to, temporarily fixed to, supported on, or located at the coil ring.

[0149] The first coil 120 can be configured as an annular coil assembly that is mounted on, inserted into, embedded in, in contact with, coupled to, fixed to, temporarily fixed to, supported on, or located on the outer circumference of the bobbin 110 or the coil seat recess 116. However, the present disclosure is not limited thereto. The first coil 120 can be directly wound on the outer circumference of the bobbin 110 or the coil seat recess 116. When the first coil 120 is mounted on, inserted into, or located on the bobbin 110 in a pre-wound state, the first coil 120 can be mounted on, inserted into, or located on the bobbin 110 from above or below the bobbin 110.

[0150] According to an embodiment, the first coil 120 may be formed substantially in an octagonal shape, such as Figure 15 As shown. The shape of the first coil 120 can correspond to the shape of the outer circumferential surface of the bobbin 110. The bobbin can also be formed into an octagonal shape. In addition, at least four surfaces of the first coil 120 can be linear, and the corners connecting the various surfaces of the first coil 120 can be rounded or linear. In this case, the linear surface can be the surface facing the driving magnet 130. In addition, the surface of the driving magnet 130 facing the first coil 120 can have the same curvature as the first coil 120. That is, when the first coil 120 is linear, the corresponding surface of the driving magnet 130 can be linear. When the first coil 120 is curved, the corresponding surface of the driving magnet 130 can be curved. In addition, the corresponding surface of the driving magnet 130 can have the same curvature as the first coil 120. Alternatively, even when the first coil 120 is curved, the corresponding surface of the driving magnet 130 can be linear, or vice versa.

[0151] When current is applied to the first coil 120 , the first coil 120 electromagnetically interacts with the driving magnet 130 to generate electromagnetic force, which moves the bobbin 110 .

[0152] Meanwhile, the first coil 120 may be configured to correspond to the driving magnet 130. When the driving magnet 130 is implemented as a single body as shown in the figure so that the entire surface of the driving magnet 130 facing the first coil 120 has the same polarity, the first coil 120 may be configured so that the surface of the first coil 120 corresponding to the driving magnet 130 has the same polarity. Meanwhile, although not shown in the figure, when the driving magnet 130 is divided into two parts on a plane perpendicular to the optical axis so that two or more surfaces of the driving magnet 130 face the first coil 120, the first coil 120 may be divided into parts corresponding to the divided parts of the driving magnet 130.

[0153] Meanwhile, the lens moving device 100A or 100B may further include a sensing magnet 182. The sensing magnet 182 may be mounted on, inserted into, embedded in, in contact with, coupled to, fixed to, temporarily fixed to, supported by, or located on the bobbin 110. Therefore, during movement of the bobbin 110 in the first direction, the sensing magnet 182 may move in the first direction by the same amount as the bobbin 110. In addition, the sensing magnet 182 may be integrally formed with the bobbin 110 and may be located such that the north pole of the sensing magnet 182 faces the upper portion of the bobbin 110 and the south pole of the sensing magnet 182 faces the lower portion of the bobbin 110. However, the present disclosure is not limited thereto. The sensing magnet 182 may be integrally formed with the bobbin 110 and may be located such that the south pole of the sensing magnet 182 faces the upper portion of the bobbin 110 and the north pole of the sensing magnet 182 faces the lower portion of the bobbin 110.

[0154] In addition, the sensing magnet 182 can be divided into two parts on a plane perpendicular to the optical axis. Figures 13 to 16 As shown, the bobbin 110 may be further provided with a receiving recess 117 on its outer circumferential surface for receiving the sensing magnet 182 .

[0155] The receiving recess 117 may be formed to a predetermined depth from the outer surface of the bobbin 110 to the inner surface of the bobbin 110. Specifically, the receiving recess 117 may be formed on one side of the bobbin such that at least a portion of the receiving recess 117 is located inside the first coil 120.

[0156] Furthermore, at least a portion of receiving recess 117 may be formed in a recessed state at a predetermined depth in bobbin 110 so as to be located further inward than coil holder recess 116. As described above, with receiving recess 117 formed in bobbin 110, sensing magnet 182 may be received in bobbin 110. Therefore, there is no need to secure a separate installation space for sensing magnet 182, thereby improving the space efficiency of bobbin 110.

[0157] Specifically, the receiving recess 117 may be located at a position of the housing member 140 corresponding to or opposite to the position sensing unit 180. Therefore, the displacement sensing unit 180 and the sensing magnet 182 may be aligned on the same axis.

[0158] The distance between the sensing magnet 182 and the displacement sensing unit 180 , which is the sum of the thickness of the first coil 120 and the distance between the first coil 120 and the displacement sensing unit 180 , may be minimized, thereby improving the accuracy of magnetic force sensing performed by the displacement sensing unit 180 .

[0159] More specifically, if Figures 13 to 16 As shown, the receiving recess 117 may include an inner surface for supporting the sensing magnet 182 and one surface of the adhesive recess 117b, and the sensing magnet 182 and one surface of the adhesive recess 117b are formed in a recessed state to a predetermined depth further inward than the inner surface, so that the adhesive is injected into the adhesive recess 117b.

[0160] The inner surface of the receiving recess 117 is a surface of the receiving recess 117 located inward toward the center of the bobbin 110. In the case where the sensing magnet 182 is formed in a rectangular parallelepiped shape, the inner surface of the receiving recess 117 is a surface of the receiving recess 117 with which the wide surface of the sensing magnet 182 contacts or is embedded.

[0161] The adhesive recess 117b may be a recess formed in a recessed state on a portion of the inner surface of the receiving recess 117 so as to be located deeper inward toward the center of the bobbin 110. The adhesive recess 117b may be formed to be flush with one surface inside the bobbin 110, on which one surface of the sensing magnet 182 is mounted, inserted, embedded, in contact with, coupled to, fixed to, temporarily fixed to, supported by, or located.

[0162] In another embodiment, the receiving recess 117 may be formed so that the distance between the inner surface of the receiving recess 117, which supports one surface (i.e., the wide surface) of the sensing magnet 182, and the outer peripheral surface of the bobbin on which the first coil 120 is disposed (i.e., the surface of the coil holder recess 116) is equal to or less than the thickness of the sensing magnet 182. Therefore, the sensing magnet 182 can be fixed in the receiving recess 117 due to the inward force applied by the first coil 120 when the first coil 120 is wound. In this case, the use of an adhesive may not be necessary.

[0163] In another embodiment, although not shown in the figure, the bobbin 110 may further include an additional receiving recess 117, which is formed on another outer peripheral surface of the bobbin 110 opposite to the outer peripheral surface on which the receiving recess 117 is formed, in the following state: the additional receiving recess 117 and the receiving recess 117 are symmetrical relative to the center of the bobbin 110 and the weight balancing member received in the additional receiving recess 117.

[0164] According to an embodiment, the sensing magnet 182 may be omitted. In this case, the driving magnet 130 may be used instead of the sensing magnet 182.

[0165] In the above-described embodiment, the position of the lens in the optical axis direction can be readjusted by feedback of the displacement amount of the lens in the optical axis direction using the result sensed by the displacement sensing unit 180 , thereby shortening the focus adjustment time of the lens.

[0166] In addition, in an embodiment, it is possible to minimize the distance between the sensing magnet 182 (which is a movable body) provided on the bobbin and the displacement sensing unit 180 (which is a stationary body) provided on the housing member 140, and more accurately sense the displacement amount of the lens in the optical axis direction, thereby more accurately positioning the lens at the focal length of the lens.

[0167] Furthermore, in an embodiment, the sensing magnet 182 may be mounted on, embedded in, in contact with, fixed to, temporarily fixed to, coupled to, supported on, or located inside the bobbin 110, and the displacement sensing unit 180 may be mounted on, embedded in, in contact with, fixed to, temporarily fixed to, coupled to, supported on, or located inside the housing member 140. Therefore, there is no need to secure an additional installation space for the displacement sensing unit 180, thereby improving the space efficiency of the camera module (particularly the bobbin).

[0168] camera module

[0169] Meanwhile, the lens moving device 100A or 100B according to the embodiment described above can be used in various fields, such as a camera module. For example, the camera module can be applied to a mobile device, such as a mobile phone.

[0170] Camera module according to an embodiment

[0171] The camera module according to the embodiment may include: a lens moving device 100A or 100B having the above-described configuration; a lens mounted on, inserted into, embedded in, in contact with, coupled to, fixed to, supported by, or located on the lens moving device 100A or 100B; an image sensor (not shown); a second circuit board (not shown) (or a main circuit board) on which the image sensor is located; and an optical system. The camera module according to the embodiment may further include a lens barrel coupled to the bobbin 110.

[0172] The lens barrel has the structure as described above, and the second circuit board as a portion on which the image sensor is mounted may form the bottom surface of the camera module. In addition, the optical system may include at least one lens for transmitting an image to the image sensor.

[0173] The camera module may also include a camera module controller (not shown). In this case, the camera module controller may compare a first displacement value calculated based on the change in current sensed by the displacement sensing unit 180 with the focal length of the lens based on the distance between the target object and the lens. If the first displacement value or current position of the lens does not correspond to the focal length of the lens, the camera module controller may adjust the amount of current applied to the first coil 120 of the bobbin 110 to move the bobbin 110 in the first direction by a second displacement. Furthermore, the displacement sensing unit 180 (which is a stationary body) fixed to and coupled to the housing member 140 may sense a change in magnetic force emitted by the sensing magnet 182 (which is a movable body) fixed to and coupled to the bobbin 110 based on the movement of the sensing magnet 182 in the first direction. Furthermore, a separate drive circuit or camera module controller may calculate and determine the current position or first change of the bobbin 110 based on a change in the current output according to the change in the sensed magnetic force. The calculated or determined current position or first variation of the bobbin 110 may be transmitted to the controller of the first circuit board 170 , and the controller may readjust the position of the bobbin 110 for autofocusing, thereby controlling the amount of current supplied to the first coil 120 .

[0174] At the same time, an actuator module for performing both the autofocus function and the hand-shake correction function can be installed in the optical system. The actuator module for performing the autofocus function can be configured in various ways. A voice coil motor is typically used. The lens moving device 100A or 100B according to the embodiments described above can correspond to an actuator module for performing the autofocus function. However, the present disclosure is not limited thereto. The lens moving device 100A or 100B according to the embodiments described above can be applied to an actuator module that performs both the autofocus function and the hand-shake correction function.

[0175] Although not shown in the figure, in the case where a second coil (not shown), a support member (not shown) and a plurality of sensing units (not shown) are added to the lens moving device 100A or 100B that performs the autofocus function, the lens moving device 100A or 100B can perform a hand shake correction function in addition to the autofocus function. The second coil can be located at a position opposite to the driving magnet. That is, the second coil can be located at a position such that the second coil directly faces the bottom surface of the driving magnet 130, each sensing unit can be implemented by a Hall sensor, and each sensing unit, the second coil and the driving magnet can be arranged on the same axis. Therefore, the second coil can move the housing member 140 equipped with the bobbin 110 in the second direction and / or the third direction by interacting with the driving magnet 130 to perform hand shake correction.

[0176] A support member may be located on an upper surface of the base 190 a or 190 b for flexibly (or elastically) supporting horizontal movement of the housing member 140 that moves in a direction perpendicular to the first direction.

[0177] In addition, the camera module may further include an infrared cutoff filter (not shown). The infrared cutoff filter is used to prevent infrared light from being incident on the image sensor. In this case, the infrared cutoff filter may be installed in Figure 2 or Figure 12 The position of the base 190a or 190b shown corresponds to the image sensor. The infrared cut filter can be coupled to a clamping member (not shown). In addition, the base 190a or 190b can support the lower side of the clamping member.

[0178] Additional terminal members for conducting electricity with the second circuit board can be mounted on the base 190a or 190b. The terminals can also be integrally formed on the base 190a or 190b using surface electrodes. At the same time, the base 190a or 190b can act as a sensor holder for protecting the image sensor. In this case, a protrusion can be formed downward along the side of the base 190a or 190b. However, the above components are not essential. Although not shown in the figure, an additional sensor holder can be located at the bottom of the base 190a or 190b to perform this function.

[0179] In the lens moving device according to one embodiment or another embodiment and the camera module including the lens moving device according to one embodiment, the cover can or the cover can be electrically connected to the second circuit board, thereby shielding electromagnetic interference including electrical noise generated from the coil or various sensors.

[0180] A camera module according to another embodiment

[0181] The camera module according to the embodiment may include a lens moving device 100A or 100B and a focus controller 300. The description of the components of the camera module corresponding to the lens moving device 100A or 100B will be omitted, and only the components of the camera module other than the lens moving device 100A or 100B will be described. Furthermore, the components according to this embodiment corresponding to the components of the camera module according to the embodiment of the related art will be omitted, and only the components of the camera module according to this embodiment other than the components of the camera module according to the embodiment of the related art will be described. Therefore, the above description of the lens moving device 100A or 100B and the camera module, which will not be described below, can be applied to the camera module according to this embodiment.

[0182] The lens moving device 100A or 100B according to this embodiment can be controlled by a focus controller 300, which will be described below, so that the distance between the lens (not shown) and the image sensor (not shown) is adjusted so that the image sensor is located at the focal length of the lens. In other words, the focus controller 300 can perform an "autofocus function" that automatically focuses the lens in the lens moving device 100A or 100B.

[0183] The focus controller 300 may be included in the first circuit board 170 described above. For example, the focus controller 300 may receive signals from pins 2-1 and 2-2 of the Hall sensor 180 as position information. The focus controller 300 may be mounted on the first circuit board 170. In another embodiment, the focus controller 300 may not be mounted on the first circuit board 170, but may be mounted on another circuit board. The other circuit board may be a second circuit board (not shown) of the camera module, on which an image sensor (not shown) is mounted, or another circuit board.

[0184] Furthermore, the lens moving device 100A or 100B according to the previous embodiment may correspond to an actuator module for performing an auto-focusing function under the control of the focus controller 300 .

[0185] Below, we will refer to Figures 17 to 21 The structure and operation of the focus controller 300 will be described. For convenience, the focus controller 300 will be described with reference to the aforementioned lens moving device 100A or 100B. However, the present disclosure is not limited thereto. That is, the focus controller 300 according to the embodiment can be applied to a lens moving device having a structure different from that of the lens moving device 100A or 100B described above to perform an autofocus function. In other words, the focus controller 300 can be applied to a lens moving device having any mechanism for performing an autofocus function, as long as the lens moving device can move the bobbin 110 in the optical axis direction through the interaction between the first coil 120 and the drive magnet 130.

[0186] Figure 17 is a flowchart illustrating an automatic focusing function (or a method of performing automatic focusing) 200 performed by a focus controller 300 of a camera module according to another embodiment, and Figure 18 is a block diagram illustrating a focus controller 300 according to an embodiment.

[0187] See also Figure 17 and Figure 18 The focus controller 300 can control the interaction between the first coil 120 and the driving magnet 130 based on the target object information and position information output from the position sensing unit 180 to move the bobbin 110 by a first movement amount (or a first displacement amount) in a first direction parallel to the optical axis, thereby performing an autofocus function. To this end, the focus controller 300 may include an information receiving unit 310, a bobbin position retrieval unit 320, and a movement amount adjustment unit 330.

[0188] The position sensing unit 180 may sense the position of the bobbin 110 in the optical axis direction, and may output the sensed result to the movement amount adjustment unit 330 as position information.

[0189] The information receiving unit 310 may receive target information (210) via the input terminal IN1. The target information may include at least one selected from the group consisting of the distance between the target and at least one lens (not shown), the distance between the target and the image sensor, the position of the target, and the phase of the target. The target information may be acquired using various methods.

[0190] In an embodiment, target object information may be acquired by using two cameras.

[0191] In another embodiment, the target object information can be acquired by using a laser. For example, Korean Patent Application Publication No. 1989-0008573 discloses a method of measuring the distance to a target object using a laser.

[0192] In another embodiment, the target object information can be obtained using a sensor. For example, US Patent Application Publication No. US2013 / 0033572 filed in the name of Sony discloses a method for obtaining the distance between a camera and a target object using a sensor.

[0193] The camera module can receive, be provided with, or obtain the aforementioned target information from the outside of the camera module. For example, when the camera module according to the embodiment is applied to a mobile terminal (or portable terminal), the mobile terminal can obtain the target information, and the obtained target information can be provided to the focus controller 300 of the camera module. In this case, the target information can be provided to the information receiving unit 310 from the image sensor of the camera module. In other words, the image sensor can provide the target information to the information receiving unit 310 of the focus controller 300. In another embodiment, the target information can be obtained by the camera module according to the embodiment.

[0194] After step 210 , the bobbin position search unit 320 may search for the focus position of the bobbin 110 corresponding to the target object information received by the information receiving unit 310 ( 220 ). To this end, the bobbin position search unit 320 may include a data extraction unit 322 and a lookup table (LUT) 324 .

[0195] Lookup table 324 can store the focal position of bobbin 110 for each target object information in a mapped state. For example, the focal position of bobbin 110 at each position between the target object and the lens can be obtained in advance and stored in lookup table 324. That is, in step 230, position sensing unit 180 can be used to create lookup table 324 in advance before bobbin 110 moves the first amount. For example, the position of bobbin 110 for each target object information can be calculated in advance based on the change in current sensed by position sensing unit 180. Therefore, the focal position of bobbin 110 for each target object information can be measured as the distance between the target object and the lens to create lookup table 324. Furthermore, lookup table 324 can be encoded to store the position of bobbin 110.

[0196] The data extraction unit 322 can receive the target object information from the information receiving unit 310, extract the focus position of the bobbin 110 corresponding to the target object information from the lookup table 324, and output the extracted position of the bobbin 110 to the movement amount adjustment unit 330. As described above, when the position of the bobbin 110 is encoded and stored in the lookup table 324, the data extraction unit 322 can retrieve the code value corresponding to the target object information from the lookup table 324.

[0197] After step 220, the movement amount adjustment unit 330 can move the bobbin 110 by a first movement amount (or a first displacement amount) to the position (230) retrieved by the bobbin position retrieval unit 320. At this time, the movement amount adjustment unit 330 can apply the position information output from the position sensing unit 180 and received through the input terminal IN2. In other words, the movement amount adjustment unit 330 can identify the current position of the bobbin 110 based on the position information provided by the position sensing unit 180, and can move the bobbin 110 from the identified current position of the bobbin to a corresponding position.

[0198] For example, the movement amount adjustment unit 330 may adjust the amount of current supplied to the first coil 120 to move the bobbin 110 by a first movement amount in a first direction. To this end, the amount of current for each bobbin position 110 may be determined in advance.

[0199] For example, the position sensing unit 180 fixed to and coupled to the housing member 140 can sense a change in the magnetic force emitted from the sensing magnet 182 (which is a movable body) fixed to and coupled to the bobbin 110 based on the movement of the sensing magnet 182 in a first direction. In this case, the movement amount adjustment unit 330 can receive and detect a change in the current output as position information based on the change in the magnetic force sensed by the position sensing unit 180, and can calculate or determine the current position of the bobbin 110 based on this position information. In addition, the movement amount adjustment unit 330 can determine the amount of current that needs to be applied in order to move the bobbin 110 by a first movement amount relative to the calculated or determined current position of the bobbin 110 to a position where the bobbin 110 is focused.

[0200] When the autofocus function is executed, the first coil 120 moves the bobbin 110 in the optical axis direction. When current is applied to the first coil 120, the first coil 120 electromagnetically interacts with the driving magnet 130 to generate an electromagnetic force. As described above, the generated electromagnetic force moves the bobbin 110.

[0201] Figure 19 (a) and Figure 19 (b) is a graph showing the autofocus function according to the comparative example. Figure 19 In (a), the horizontal axis represents the focal length value, and the vertical axis represents the displacement. Figure 19 In (b), the horizontal axis represents current (or time), and the vertical axis represents displacement (or code).

[0202] Figure 20 (a) and Figure 20 (b) is a diagram showing the auto focus function according to the embodiment. Figure 20 In (a), the horizontal axis represents the focal length value, and the vertical axis represents the displacement. Figure 20In (b), the horizontal axis represents current (or time), and the vertical axis represents displacement (or code).

[0203] See also Figure 19 In Figures 19(a) and 19(b), as the current increases, the position (or displacement) 400 of the bobbin 110 with the most correct focal length (or focus) is sought from a first reference focal length (infinity) at which the distance between the lens and the image sensor is longest to a second reference focal length (macro) at which the distance between the lens and the image sensor is shortest. The bobbin 110 is not driven during a predetermined time period P when the current is initially supplied. Subsequently, as the current 402 (or the code value 404 corresponding to the amount of change in magnetic force sensed by the position sensing unit 180) continues to increase, the displacement of the bobbin 110 increases. In the comparative example, the position 400 of the bobbin 110 with the most correct focal length (or focus) is sought after the bobbin 110 moves from the first reference focal length to the second reference focal length. Therefore, this process can take a considerable amount of time.

[0204] See also Figure 20 (a) and Figure 20 (b) On the other hand, the code corresponding to the bobbin 110 having the correct focal length (or focus) is retrieved from the lookup table 324 using the target object information, and the bobbin 110 can be directly moved (410) to the corresponding focal length position (or displacement) based on this code. Therefore, the time taken to focus the lens can be shortened compared to the comparative example.

[0205] Back to Figure 17 After adjusting the focal length of the lens in steps 210 to 230, the focal length of the lens can be finely adjusted (240 to 260).

[0206] After moving the bobbin 110 by a first amount in step 230, the focus controller 300 may move the bobbin 110 within a second amount smaller than the first amount to find a focus position 400 (240) of the bobbin 110 that exhibits a maximum modulation transfer function (MTF) value. The MTF value is a numerical value of resolving power.

[0207] After step 240, the focus controller 300 determines whether the bobbin 110 has moved for a predetermined period of time to find the maximum MTF value (250). Alternatively, the focus controller 300 may determine whether the bobbin 110 has moved a predetermined number of times to find the maximum MTF value (250). Otherwise, the bobbin 110 may continue to move for more than a predetermined period of time or more than a predetermined number of times until the maximum MTF value is found.

[0208] Upon determining that the bobbin 110 has moved for a predetermined period of time or a predetermined number of times, the focus controller 300 determines a position of the bobbin 110 exhibiting a maximum MTF value as a final focus position of a lens having a correct focal length ( 260 ).

[0209] Figure 21 (a) and Figure 21 (b) is a diagram showing fine adjustment of the auto focus function according to the embodiment. Figure 21 In (a), the horizontal axis represents the focal length value, and the vertical axis represents the displacement. Figure 21 In (b), the horizontal axis represents current (or time), and the vertical axis represents displacement (or code).

[0210] See also Figure 21 (a) and 21(b), after performing steps 210 to 230 to preliminarily adjust the focus of the lens (410), steps 240 to 260 may be performed to finely adjust the focus of the lens (420).

[0211] In the camera module according to the embodiment, the lens focus is precisely adjusted by performing steps 240 to 260 , thereby improving the resolving power.

[0212] Therefore, the camera module according to the embodiment can quickly and accurately perform an auto-focusing function.

[0213] Although these embodiments have been described with reference to a number of illustrative embodiments, it will be understood that numerous other modifications and embodiments may be devised by those skilled in the art within the spirit and scope of the principles of this disclosure. More particularly, various variations and modifications may be made to the components and / or arrangements of the described principal combination within the scope of this disclosure, the drawings, and the appended claims. In addition to various variations and modifications to the components and / or arrangements, alternative uses will also be apparent to those skilled in the art.

Claims

1. A lens moving device, comprising: base; housing components; a bobbin disposed in the housing member and equipped with at least one lens; Coil; a driving magnet that moves the bobbin in the optical axis direction of the at least one lens through interaction between the coil and the driving magnet; a can cover, the can cover comprising a protrusion extending in a direction parallel to the optical axis; as well as a first circuit board configured to supply current to the coil, wherein the cover can and the base are coupled to each other to form a space for accommodating the bobbin, the first circuit board, and the driving magnet; wherein the protrusion of the cover can is configured to be electrically connected to a second circuit board so that the cover can and the second circuit board are grounded, and an image sensor is mounted on the second circuit board; The protrusion of the cover can is arranged at a position closer to the lowermost surface of the cover can than the upper surface of the cover can, and Wherein, the distance from the protrusion of the cover can to the edge line between the side surface of the cover can provided with the protrusion and the adjacent side surface thereof is greater than the uppermost width of the protrusion of the cover can.

2. The lens shifting device according to claim 1, wherein: The lid can comprises an upper surface and four side surfaces extending from the upper surface, wherein a third recess is formed on one of the four side surfaces of the lid can, and The first circuit board is exposed to the outside through the third recess of the cover can.

3. The lens moving device according to claim 1, comprising: A displacement sensing unit is provided on the first circuit board.

4. The lens shifting device according to claim 1, wherein: The base includes a recess, and Wherein, the protrusion of the cover can is arranged in the recess of the base.

5. The lens shifting device according to claim 1, wherein: The lid can includes an upper surface and four side surfaces extending from the upper surface, and Wherein, the protrusion of the cover can is formed on the side surface among the four side surfaces of the cover can.

6. The lens shifting device according to claim 1, wherein: The lid can includes an upper surface and four side surfaces extending from the upper surface, and Wherein, the protrusion of the cover can is formed on each of the four side surfaces of the cover can.

7. The lens shifting device according to claim 1, wherein: The bumps are configured to be electrically connected to the second circuit board by soldering, conductive epoxy, or welding.

8. The lens shifting device according to claim 3, wherein: The lid can comprises an upper surface and four side surfaces extending from the upper surface, The driving magnet includes a first driving magnet and a second driving magnet opposite to the first driving magnet. The first driving magnet and the second driving magnet are respectively arranged at positions corresponding to two of the four side surfaces. The displacement sensing unit is provided at a position corresponding to one of the other two side surfaces among the four side surfaces, and The displacement sensing unit does not overlap with the driving magnet in directions of the two side surfaces facing each other.

9. The lens shifting device according to claim 1, wherein: Terminals for supplying current to the coil are included.

10. The lens moving device according to claim 9, wherein: The lid can comprises an upper surface and four side surfaces extending from the upper surface, Wherein, the terminal and the protrusion are arranged on the same side surface of the four side surfaces of the cover can.

11. The lens shifting device according to claim 1, wherein: The first circuit board includes a central area and a peripheral area.

12. A lens moving device comprising: base; a can lid, the can lid comprising an upper surface and four side surfaces extending from the upper surface; a bobbin configured to be coupled to at least one lens and disposed in the lid can; Coil; a driving magnet that moves the bobbin in the optical axis direction of the at least one lens through interaction between the coil and the driving magnet; as well as a first circuit board configured to supply current to the coil, wherein the cover can and the base are coupled to each other to form a space for accommodating the bobbin, the first circuit board, and the driving magnet; wherein the cover can includes a protrusion extending in the direction of the optical axis and arranged on one of the four side surfaces, wherein the protrusion of the cover can is configured to be electrically connected to a second circuit board so that the cover can and the second circuit board are grounded, and an image sensor is mounted on the second circuit board; wherein the protrusion of the cover can is arranged at a position closer to the lowermost surface of the cover can than the upper surface of the cover can, and Wherein, the distance from the protrusion of the cover can to the edge line between the side surface of the cover can provided with the protrusion and the adjacent side surface thereof is greater than the uppermost width of the protrusion of the cover can. 13 . The lens moving device of claim 12 , wherein the protrusion is configured to be electrically connected to the second circuit board by soldering, conductive epoxy, or welding.

14. The lens moving device according to claim 12, further comprising: a sensing magnet coupled to the bobbin; as well as A sensing unit is provided between the first circuit board and the sensing magnet.

15. The lens moving device according to claim 14, wherein: A first recess is formed at one of the four side surfaces of the lid can.

16. The lens moving device according to claim 14, wherein: The terminal portion of the first circuit board is provided on a side surface of the base.

17. The lens moving device according to claim 12, comprising a housing member, in, The bobbin is disposed in the housing member.

18. The lens moving device according to claim 17, wherein: The terminal portion of the first circuit board is provided between the cover can and a side surface of the outer casing member.

19. The lens moving device according to claim 12, comprising a terminal for supplying current to the coil, in, The terminal and the protrusion are arranged on the same side surface of the four side surfaces of the cover can.

20. A lens moving device comprising: base; a can cover comprising an upper surface, four side surfaces extending from the upper surface, and a protrusion, wherein the protrusion protrudes in the optical axis direction on at least one of the four side surfaces of the can cover; a bobbin configured to be coupled to at least one lens and disposed in the lid can; Coil; a driving magnet that moves the bobbin in the optical axis direction of the lens through interaction between the coil and the driving magnet; as well as a first circuit board configured to supply current to the coil, wherein the cover can and the base are coupled to each other to form a space for accommodating the bobbin, the first circuit board, and the driving magnet; wherein the protrusion of the cover can is configured to be electrically connected to a second circuit board so that the cover can and the second circuit board are grounded, and an image sensor is mounted on the second circuit board, and wherein the protrusion of the cover can is arranged at a position closer to the lowermost surface of the cover can than the upper surface of the cover can, and Wherein, the distance from the protrusion of the cover can to the edge line between the at least one side surface of the cover can provided with the protrusion of the cover can and the adjacent side surface thereof is greater than the uppermost width of the protrusion of the cover can. 21 . The lens moving device according to claim 20 , comprising a sensing unit provided on the first circuit board.

22. The lens moving device according to claim 21, comprising a sensing magnet coupled to the bobbin and provided at a position corresponding to the sensing unit, in, The sensing unit is disposed between the first circuit board and the sensing magnet.

23. The lens moving device according to claim 20, wherein: The first circuit board includes a power terminal for supplying power and an I terminal for receiving signals. 2 C communication terminal.

24. The lens moving device according to claim 20, comprising a terminal for supplying current to the coil, in, The terminal and the protrusion are provided on at least one of the four side surfaces of the cover can.

25. A camera module, comprising: base; a second circuit board; a can lid, the can lid comprising an upper surface and four side surfaces extending from the upper surface; an image sensor, wherein the image sensor is disposed on the second circuit board; a bobbin disposed in the cover can; at least one lens coupled to the bobbin, Coil; a driving magnet that moves the bobbin in the optical axis direction of the at least one lens through interaction between the coil and the driving magnet; as well as a first circuit board configured to supply current to the coil, wherein the cover can and the base are coupled to each other to form a space for accommodating the bobbin, the first circuit board, and the driving magnet, wherein the cover can includes a protrusion extending in the direction of the optical axis, wherein the second circuit board is configured to be electrically connected to the protrusion of the can cover so that the protrusion of the can cover and the second circuit board are grounded, wherein the protrusion of the cover can is arranged at a position closer to the lowermost surface of the cover can than the upper surface of the cover can, and Wherein, the distance from the protrusion of the cover can to the edge line between the side surface of the cover can provided with the protrusion and the adjacent side surface thereof is greater than the uppermost width of the protrusion of the cover can.

26. The camera module according to claim 25, comprising: a displacement sensing unit, wherein the displacement sensing unit is disposed on the first circuit board; as well as A sensing magnet is coupled to the bobbin and is disposed at a position corresponding to the displacement sensing unit.

27. The camera module according to claim 25, wherein: The protrusion of the lid can is provided on the side surface among the four side surfaces of the lid can.

28. The camera module according to claim 25, wherein: The bumps are connected to the second circuit board by soldering, conductive epoxy, or welding.

29. A camera module, comprising: base; a second circuit board; an image sensor, wherein the image sensor is disposed on the second circuit board; a can lid, the can lid comprising an upper surface and four side surfaces extending from the upper surface; a bobbin disposed in the cover can; at least one lens coupled to the bobbin; Coil; a driving magnet that moves the bobbin in the optical axis direction of the at least one lens through interaction between the coil and the driving magnet; as well as a first circuit board configured to supply current to the coil, wherein the cover can and the base are coupled to each other to form a space for accommodating the bobbin, the first circuit board, and the driving magnet; wherein the cover can includes an area configured to be electrically connected to a ground of the second circuit board, wherein the region includes a protrusion extending in the direction of the optical axis, wherein the protrusion of the region is configured to be electrically connected to a second circuit board so that the cover can and the second circuit board are grounded, wherein the protrusion of the cover can is arranged at a position closer to the lowermost surface of the cover can than the upper surface of the cover can, and Wherein, the distance from the protrusion of the cover can to the edge line between the side surface of the cover can provided with the protrusion and the adjacent side surface thereof is greater than the uppermost width of the protrusion of the cover can.

30. The camera module according to claim 29, wherein: The second circuit board is connected to the protrusions of the cover can by soldering, conductive epoxy, or welding.

31. The camera module according to claim 29, comprising: a sensing magnet coupled to the bobbin; as well as A sensing unit is provided between the first circuit board and the sensing magnet.

32. The camera module according to claim 29, wherein: A third recess is formed at one of the four side surfaces of the lid can.

33. A camera comprising the lens moving device according to any one of claims 1 to 24.

34. A mobile phone comprising the camera according to claim 33.

35. A focus controller comprising: An information receiving unit, configured to receive target object information; a bobbin position retrieval unit, configured to retrieve a position of a bobbin having a correct focal length corresponding to the received target object information; as well as The movement amount adjustment unit is used to move the bobbin by a first movement amount to a searched position.

36. A method for performing an auto-focus function, comprising: receiving target object information; Retrieving a position of a bobbin having a correct focal length corresponding to the received target object information; moving the bobbin a first amount to a retrieved position; moving the bobbin a second movement amount; determining whether the bobbin has moved for a predetermined period of time to find a maximum MTF value; as well as The position of the bobbin having the maximum MTF value is determined as the final focal length position of the lens having the correct focal length.

Images