Aperture module and camera module including same

Abstract

The purpose of an embodiment of the present invention is to provide an aperture module capable of reducing magnetic field interference between an AF magnet and a ring magnet, and a camera module including same. The positions of poles of the AF magnet and the ring magnet are appropriately adjusted such that the magnetic field interference is reduced. Accordingly, the aperture module can be driven efficiently, and the correlation between the number of poles of the AF magnet and that of the ring magnet can be used. The number of poles of the second magnet is increased to secure the diversity of the number or position of a plurality of coils, fixed shafts, and rolling members inside the aperture module such that the aperture module can be designed more freely. Two or more position sensors are asymmetrically arranged according to the arrangement of the coils such that the rotational displacement of the ring magnet can be measured more accurately, and the thrust of the aperture module can be adjusted through the size, number, and number of turns of the coils.

Description

Aperture module and camera module including the same

[0001] The present invention relates to an aperture module and a camera module including the same.

[0002] The following description provides background information regarding the present embodiment and does not describe prior art.

[0003] A camera device is a device that captures a subject in photos or videos, and is mounted on portable devices, drones, vehicles, etc.

[0004] The camera device may include a lens drive device having an Image Stabilization (IS) function, such as Optical Image Stabilizer (OIS), and an Auto Focusing (AF) function, to correct or prevent image shaking caused by user movement in order to improve image quality.

[0005] Such a lens driving device includes a stationary body and a movable body that moves within the stationary body in the direction of the optical axis or in a direction perpendicular to the direction of the optical axis, and a lens module may be coupled to the movable body.

[0006] Additionally, the camera device includes an aperture module that controls the amount of light entering (light incidence), similar to a human iris. The aperture module may be attached to the top of a lens module or positioned between multiple lens modules.

[0007] The aperture module can control the amount of light incident by changing the size of the aperture as multiple blades forming a single aperture rotate around a rotation axis.

[0008] The movement of the moving body in the lens drive unit and the rotation of multiple blades in the aperture module can be achieved through the interaction between the respective coils and magnets placed in the lens drive unit and the aperture module.

[0009] In this case, the ring magnet driving the AF magnet for the autofocus function and the aperture module may cause magnetic field interference depending on their position, thereby generating an external force that hinders the rotation of the driving magnet.

[0010] The present invention aims to solve at least one of the aforementioned technical issues.

[0011] One embodiment of the present invention proposes an aperture module capable of reducing magnetic field interference between an AF magnet and a ring magnet, and a lens driving device including the same.

[0012] In addition, the embodiment can vary the arrangement of the coils included in the aperture module.

[0013] The technical problems to be solved by the present invention are not limited to those mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which the present invention belongs from the description below.

[0014] A camera module according to one embodiment of the present invention includes a first magnet and aperture module comprising a plurality of spaced-apart first magnet units, wherein the aperture module includes a coil portion comprising a plurality of coils and a ring-shaped second magnet facing the coil portion and interacting with the coil portion to rotate about a first axis, wherein the second magnet includes a plurality of N poles and a plurality of S poles arranged alternately with each other, wherein the plurality of first magnet units includes a first-1 magnet unit and a first-2 magnet unit adjacent to the first-1 magnet unit, and the plurality of S poles of the second magnet include a first S pole and a second S pole adjacent to the first S pole, wherein when a virtual first-1 line perpendicular to the first axis and passing through the center of the first-1 magnet unit and a virtual second-1 line perpendicular to the first axis and passing through the center of the first S pole overlap when viewed on a plane (Top view), the center of the first-2 magnet unit perpendicular to the first axis The imaginary first-second axis passing through and the imaginary second-second axis perpendicular to the first axis and passing through the center of the second south pole may not overlap when viewed in a plane (top view).

[0015] For example, the first magnet and the second magnet may not overlap in a direction parallel to the first axis.

[0016] For example, the center of the 1-1 magnet may be the center of the side forming the inner surface of the 1-1 magnet, and the center of the 1-2 magnet may be the center of the side forming the inner surface of the 1-2 magnet.

[0017] For example, when viewed from a top view, the first angle formed by line 1-1 and line 1-2 and the second angle formed by line 2-1 and line 2-2 can satisfy the relationship “first angle ≠ second angle * N (where N is a natural number greater than or equal to 1)”.

[0018] For example, the aperture module may include a fixed part where a coil part is placed, a movable part where a second magnet is placed, and a blade part that is combined with the fixed part and the movable part to form a variable opening.

[0019] For example, the moving part includes a protrusion disposed on the outer side of the second magnet, and the inner surface of the protrusion has a flat surface, and the second magnet includes a flat surface formed on the outer circumference, and the flat surface may face the inner surface of the protrusion.

[0020] For example, multiple coils can be arranged symmetrically with respect to a virtual plane including a first axis.

[0021] For example, it further includes a plurality of position sensors disposed in the coil portion, and the plurality of position sensors are disposed between the plurality of coils and may be disposed asymmetrically with respect to the first axis.

[0022] For example, it may further include a ring-shaped yoke positioned between the second magnet and the moving part.

[0023] For example, the blade portion includes a plurality of blade layers stacked in the direction of a first axis, and each of the plurality of blade layers may include a plurality of blades.

[0024] For example, a plurality of blades included in the blade layer may be arranged symmetrically with respect to a first axis.

[0025] For example, the fixed part includes a plurality of fixed axes spaced apart at equal angles with respect to a first axis, and the movable part includes a plurality of movable axes spaced apart at equal angles with respect to a first axis, and each of the plurality of blades may include a fixed axis hole coupled to a fixed axis and a movable axis hole coupled to a movable axis.

[0026] For example, it further includes a rolling member disposed between a fixed part and a moving part, and a plurality of coil units are disposed in a first space among a plurality of spaces formed between a plurality of fixed axes, and the rolling member may be disposed in a second space among the plurality of spaces other than the first space.

[0027] For example, it further includes a rolling member positioned between a fixed part and a movable part, and

[0028] The rolling member, the plurality of coils, and the plurality of fixed axes may not overlap in a direction parallel to the first axis.

[0029] For example, the blade rotates about the fixed axis as the moving axis rotates about the first axis, and the moving axis hole may have a path that rotates the blade such that the variable opening formed by the plurality of blades becomes larger as the moving axis rotates and approaches the fixed axis.

[0030] For example, the blade portion can form a variable opening that becomes larger as the distance between the moving axis and the fixed axis coupled to the blade decreases.

[0031] For example, the blade portion may include three blade layers, and the blade layers may include three blades arranged point-symmetrically with respect to a first axis.

[0032] For example, the multiple virtual lines connecting the first axis and each of the three blades' fixed axis holes can have an angle of 120°.

[0033] For example, the blade portion includes a plurality of blade layers, each layer comprising a plurality of blades, and the blade portion includes a first blade and a second blade that are adjacent to each other and are disposed on different blade layers among the plurality of blade layers, and the virtual line connecting the first axis and the fixed axis hole of the first blade and the virtual line connecting the first axis and the fixed axis hole of the second blade may have an angle of 35° to 45° when viewed on a plane (Top view).

[0034] An aperture module included in a camera module comprising a plurality of first magnets according to one embodiment of the present invention includes a ring-shaped second magnet arranged to be rotatable with respect to an optical axis and a coil portion facing the second magnet, wherein when viewed from a direction parallel to the optical axis, one of a plurality of first virtual lines passing through the optical axis and the center of each of the plurality of first magnets and one of a plurality of second virtual lines passing through the optical axis and the center of either the S pole or the N pole of the second magnet overlap, only a portion of the plurality of first virtual lines may overlap with the plurality of second virtual lines.

[0035] For example, the first magnet can be arranged point-symmetric with respect to the optical axis.

[0036] For example, the number of multiple second virtual lines may be different from an integer multiple of the number of multiple first virtual lines.

[0037] For example, if the number of multiple first virtual lines is 4, the number of multiple second virtual lines may be 3, 5, 6, 7, 9, or 11.

[0038] For example, the aperture module may include a second magnet and a moving axis, a moving part rotatable about an optical axis, a coil part and a fixed part including a fixed axis, and a hole into which each of the moving axis and the fixed axis is inserted, and may include a plurality of blades forming a second opening that varies by the interaction between the second magnet and the coil part.

[0039] For example, the coil portion includes a substrate and a plurality of coils disposed on the substrate, and the number of the plurality of coils may be any one of two to the number of poles constituting the second magnet.

[0040] For example, the coil portion further includes a plurality of position sensors spaced apart on a substrate, and the plurality of position sensors may be asymmetrically arranged between the plurality of coils.

[0041] For example, multiple coils may be arranged point-symmetrically with respect to the optical axis, or plane-symmetrically with respect to a plane containing the optical axis.

[0042] For example, the number of multiple coils may be a factor of the number of poles constituting the second magnet.

[0043] For example, when the number of poles constituting the second magnet is 12, the number of coils can be 3, 4, or 6.

[0044] For example, the fixed axis can be arranged point-symmetrically with respect to the optical axis.

[0045] For example, the aperture module further includes a rolling member positioned between a moving part and a fixed part, and the rolling member may be positioned point-symmetrically with respect to the optical axis.

[0046] For example, a plurality of coils, a fixed shaft, and a rolling member may be non-overlapping with each other in a first direction.

[0047] For example, if the number of poles constituting the second magnet is 12 and there are 4 rolling members, the number of fixed shafts may be 8.

[0048] For example, if the number of poles constituting the second magnet is 12 and there are 3 rolling members, the number of fixed shafts may be 9.

[0049] In one embodiment of the present invention, a lens driving device including an aperture module comprises an aperture module and a plurality of first magnets spaced apart from each other on the outer side of the aperture module, wherein the aperture module includes a North pole and a South pole arranged to be positioned alternately with each other, a ring-shaped second magnet arranged to be rotatable about an optical axis, and a coil portion facing the second magnet, and when viewed from a direction parallel to the optical axis, if one of a plurality of first virtual lines passing through the optical axis and the center of each of the plurality of first magnets and one of a plurality of second virtual lines passing through the optical axis and the center of either the South pole or the North pole of the second magnet overlap, only a portion of the plurality of first virtual lines may overlap with the plurality of second virtual lines.

[0050] For example, it further includes a substrate portion comprising a first opening and a plurality of first magnets disposed around the first opening, and a bobbin disposed within the first opening, and an aperture module may be disposed on the upper part of the bobbin.

[0051] A lens driving device including an aperture module in one embodiment of the present invention comprises a plurality of aperture magnets having a ring shape with respect to an optical axis, wherein a plurality of N poles and S poles are alternately arranged with respect to each other, a plurality of AF magnets spaced apart from each other on the outer side of the plurality of aperture magnets when viewed in a direction parallel to the optical axis, a coil portion arranged facing the plurality of aperture magnets, and a plurality of blades that form an opening passing through the optical axis and vary the opening through the interaction between the plurality of aperture magnets and the coil portion, and when the opening is varied when viewed in a direction parallel to the optical axis, if some of the plurality of first virtual lines passing through the center of the optical axis and one of the plurality of N poles and S poles overlap with some of the plurality of second virtual lines passing through the center of the optical axis and the plurality of AF magnets, the remainder of the plurality of first virtual lines may not overlap with the remainder of the plurality of second virtual lines.

[0052] A lens driving device including an aperture module in one embodiment of the present invention comprises: first-1 to first-M magnets (where M is a positive integer greater than or equal to 2) spaced apart from each other; second-1 to second-N magnets (where M is a positive integer greater than or equal to 2) arranged inside the first-1 to first-M magnets when viewed in a direction parallel to the optical axis, wherein the N poles and S poles of each magnet are arranged alternately to form a ring shape; a coil portion arranged facing the second-1 to second-N magnets; and a plurality of blades forming an aperture that varies through the interaction between the second-1 to second-N magnets and the coil portion, wherein when viewed in a direction parallel to the optical axis, a first-m virtual line passes through the optical axis and the center of the m-th (1 ≤ m ≤ M) magnet, and a second-n virtual line passes through the optical axis and the center of the N pole or S pole of the n-th (1 ≤ n ≤ N) magnet, and the second-1 While the magnets and the coil portion interact, the virtual lines 1-1 to 1-M and the virtual lines 2-1 to 2-N may partially overlap while the remainder does not overlap.

[0053] The embodiment enables smooth operation of the aperture module by reducing magnetic field interference through appropriate adjustment of the positions of the poles of the AF magnet and the ring magnet. To this end, the embodiment may utilize the correlation between the number of poles of the AF magnet and the ring magnet.

[0054] The embodiment allows for a more flexible design of the aperture module by increasing the number of poles of the second magnet to ensure diversity in the number or position of multiple coils, fixed axes, and rolling members inside the aperture module.

[0055] The embodiment can measure the rotational displacement of the ring magnet more accurately by arranging two or more position sensors asymmetrically according to the arrangement of the coil.

[0056] The embodiment can adjust the thrust of the aperture module through the size, number, and number of turns of the coil.

[0057] The effects obtainable from the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description below.

[0058] FIG. 1 is a perspective view illustrating a lens driving device including an aperture module according to one embodiment of the present invention.

[0059] FIG. 2 is an exploded perspective view of the cover of the lens driving device shown in FIG. 1.

[0060] FIG. 3 is an exploded view of the lens driving device (excluding the first to third covers) illustrated in FIG. 2.

[0061] FIGS. 4a to 4c are drawings illustrating an aperture module according to an embodiment of the present invention, where FIG. 4a illustrates a blade portion, FIG. 4b illustrates a moving portion, and FIG. 4c illustrates a fixed portion.

[0062] Figure 5 is a bottom view of the coil portion of the fixed portion of Figure 4c.

[0063] FIGS. 6a to 6d are plan views illustrating the magnetic field interference phenomenon of a lens driving device according to a comparative example.

[0064] FIGS. 7a and 7b are plan views illustrating the magnetic field interference phenomenon of a lens driving device according to an embodiment.

[0065] FIGS. 8a to 8c are bottom views illustrating a plurality of coils, a fixed axis, and a rolling member of an aperture module according to an embodiment.

[0066] FIG. 9 is a perspective view showing that the blade portion of the aperture module according to the present invention is composed of three layers.

[0067] FIGS. 10a and FIGS. 10b are exemplary diagrams showing the shape according to the operation of the blade portion in an aperture module according to one embodiment of the present invention.

[0068] FIGS. 11a and FIGS. 11b are exemplary diagrams showing the shape according to the operation of the blade portion in an aperture module according to another embodiment of the present invention.

[0069] FIG. 12 is an exemplary diagram showing the shape of a light incident aperture formed by an aperture module according to the present invention.

[0070] FIG. 13 is an example diagram showing the change in the shape of the light incident aperture when the blade constituting the aperture module is changed.

[0071] Embodiments of the present invention are described below with reference to the attached drawings so that those skilled in the art can easily implement them. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification are denoted by similar reference numerals.

[0072] The terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, terms such as "comprising" or "having" are intended to specify the presence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0073] Terms such as “…part,” “…unit,” and “module” as described in the specification refer to a unit that processes at least one function or operation, and this may be implemented in hardware, software, or a combination of hardware and software.

[0074] Terms containing ordinal numbers, such as “first,” “second,” etc., may be used to describe various components, but said components are not limited by said terms. These terms may be used solely in a nominal sense to distinguish one component from another, and their sequential meaning is determined not by such nomenclature but by the context of the description.

[0075] The term “and / or” is used to include any combination of the multiple items in question. For example, “A and / or B” means including all three cases, such as “A,” “B,” and “A and B.”

[0076] When it is stated that one component is "connected" or "joined" to another component, it should be understood that while it may be directly connected or joined to that other component, there may also be other components in between.

[0077] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0078] Hereinafter, an aperture module according to the present invention and a camera module including the same will be described with reference to the attached drawings.

[0079] Hereinafter, "lens driving device" may be referred to as a lens driving unit, VCM (Voice Coil Motor), actuator, or lens moving device, and "aperture module" may be expressed as an aperture module unit, aperture, variable aperture, variable aperture module, actuator, etc. Additionally, "camera module" may be expressed as a camera device, camera, optical instrument, etc.

[0080] Hereinafter, the term "coil" may be replaced with "coil unit," the term "magnet" may be replaced with "magnetic member," the term "rolling member" may be replaced with "ball member," and "substrate" may be replaced with "circuit board." "Terminal" may be replaced with "pad," "electrode," "conductive layer," or "bonding part."

[0081] In addition, the "AF magnet" described below may be a magnet that performs the AF function of a lens drive unit, but this is merely one embodiment and is not limited thereto; it may be any one of the OIS magnet of the lens drive unit, the AF magnet of the sensor drive unit, and the OIS magnet of the sensor drive unit, or a shared magnet that simultaneously performs AF and OIS driving of the lens drive unit or the sensor drive unit. That is, the "AF magnet" may be a magnet included in a camera module excluding the magnet included in the aperture module (or the magnet driving the aperture), and this may be expressed as a substitute for the "first magnet."

[0082] Additionally, the "ring magnet" may be a magnet that drives an aperture (or actuator), and may be replaced with "second magnet," "aperture magnet," or "driving magnet" below.

[0083] The following description does not cover all components necessary for the aperture module and lens driving device, and even for the described configurations, only the parts necessary for the implementation of the present invention are described. Matters not specifically described in this description may be replaced by configurations known to those skilled in the art or by known technical configurations.

[0084] In the drawings, for convenience, the Cartesian coordinate system (x-axis, y-axis, z-axis) is used for explanation. However, it is not necessarily limited to this, and it is understood that it can also be explained using other coordinate systems. According to the Cartesian coordinate system, the x-axis, y-axis, and z-axis are orthogonal to each other, but the embodiments are not limited to this. That is, the x-axis, y-axis, and z-axis may intersect each other.

[0085] Here, the x-axis direction may be a concept that includes both the +x-axis and -x-axis directions, the y-axis direction may be a concept that includes both the +y-axis and -y-axis directions, and the z-axis direction may be a concept that includes both the +z-axis and -z-axis directions.

[0086] The optical axis may be the optical axis of the lens mounted on the lens barrel. Alternatively, for example, the optical axis may be an axis perpendicular to the imaging area of ​​the image sensor and passing through the center of the imaging area. The direction of the optical axis is denoted as 'OA', and the direction parallel to or parallel to the optical axis may be referred to as the 'Z-axis direction'. The parts included in the aperture module (500) and the lens driving device (10) may move in a direction perpendicular to the optical axis, so the center of the aperture or hollow of each part may not coincide with the optical axis; however, this description is based on the assumption that the optical axis refers to the center of the aperture of each part, as each part is aligned around the optical axis.

[0087] In the embodiment, the uppermost side in the +z-axis direction may be the object side or the side closest to the subject, and the lowermost side in the -z-axis direction may be the image side or the side closest to the image sensor.

[0088] In the embodiment, the x-axis direction and the y-axis direction may be two intersecting directions included on a plane perpendicular to the optical axis, which are directions perpendicular to the z-axis. The x-axis and y-axis directions may be directions in which a plurality of first magnets (201) are positioned relative to the optical axis.

[0089] Additionally, when referred to as a direction perpendicular to the optical axis in this description, this may be a concept that includes the x-axis direction and the y-axis direction. Alternatively, it may be used to refer to the x-axis direction or the y-axis direction, or to refer to a direction other than the x-axis direction and the y-axis direction.

[0090] Hereinafter, a lens driving device (10) according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is a perspective view showing a lens driving device (10) including an aperture module (500) according to an embodiment of the present invention, FIG. 2 is an exploded perspective view showing the cover of the lens driving device (10) shown in FIG. 1 exploded, and FIG. 3 is an exploded perspective view of the lens driving device (10) (excluding the first to third covers (103)) shown in FIG. 2.

[0091] Referring to FIGS. 1 and 2, the lens driving device (10) includes a first cover (101) and a second cover (102) that surround a substrate portion (200). A third cover (103) may be disposed on the upper side of the aperture module (500). The internal space formed by the first cover (101) and the second cover (102) may include a substrate portion (200) and a housing (310) disposed on the substrate portion (200).

[0092] Referring to FIG. 3, the lens driving device (10) may include a substrate portion (200) and a housing (310) that are stacked or arranged in order according to the z-axis direction, a bobbin (not shown) disposed within the housing (310), a lens module (400), an aperture module (500), and a third cover (103) that are stacked or arranged in order according to the z-axis direction on the bobbin.

[0093] Additionally, although not shown in the drawing, an upper elastic member may be further included that is divided into multiple parts and coupled to the bobbin and housing (310) to elastically support the movement of the bobbin in a direction parallel to the optical axis.

[0094] Additionally, although not specifically illustrated, the lens driving device (10) of the present invention may include a plurality of coils, a driving magnet, a position sensor, and a sensing magnet, etc., for performing an optical image stabilizer (OIS) and auto-focusing function.

[0095] Here, the image stabilization function refers to a feature that prevents the outline of a captured image from being formed clearly due to vibrations caused by the user's hand shake when capturing a still image. To correct image shaking caused by factors such as the user's hand shake, the lens module (400) can be moved in a direction perpendicular to the optical axis (OA). That is, the image stabilization function compensates for shaking by applying a relative displacement corresponding to the shaking to the lens module (400) when shaking occurs during video recording due to the user's hand shake, etc.

[0096] Additionally, the auto-focusing function refers to automatically focusing the image of a subject onto the image sensor surface. In order to automatically focus the image of a subject, the lens module (400) can be moved in a direction parallel to the optical axis (OA). That is, the auto-focusing function provides the lens module (400) with a displacement to focus on the subject.

[0097] The substrate portion (200) may include a body and a first opening penetrating in the optical axis direction at the center of the body. The first opening may have a length extended in the z-axis direction by a protrusion protruding from the body in the z-axis direction.

[0098] Various circuit devices for driving a plurality of AF magnets (hereinafter, first magnets (201)) and a lens driving device (10) may be arranged in the body of the substrate (200). The various circuit devices may be, for example, an image sensor, an integrated circuit storing an algorithm for performing autofocusing operation and image stabilization functions, an aperture module control board (810) that provides a signal for controlling the aperture module (500), etc. These are merely examples and are not necessarily required to be included, and other configurations other than those mentioned in the examples may be added.

[0099] The housing (310) can form an internal space between the housing (310) and the substrate part (200). A plurality of first magnets (201) and various circuit devices disposed on the body of the aforementioned substrate part (200) can be disposed in the formed internal space.

[0100] The substrate portion (200) and the housing (310) may include a plurality of insertion grooves into which a plurality of first magnets (201) can be coupled or inserted, and the plurality of first magnets (201) may be disposed and fixed within a plurality of spaces formed by the plurality of insertion grooves of the substrate portion (200) and the housing (310) coupled in the z-axis direction. The z-axis length of the plurality of spaces may be equal to or greater than the z-axis length of the first magnet (201).

[0101] The housing (310) can be positioned inside the first cover (101) and between the first cover (101) and the bobbin. The housing (310) can accommodate the bobbin inside, and the outer surface of the housing (310) can be spaced apart from the inner surface of the side plate of the first cover (101). Due to the space between the housing (310) and the first cover (101), the housing (310) can move horizontally with respect to the optical axis. Through this, the aforementioned optical image stabilization (OIS) function can be performed.

[0102] The housing (310) may have a hollow column shape overall. For example, the housing (310) may have a polygonal (e.g., square or octagonal) or circular opening, and the opening of the housing (310) may be in the form of a through hole penetrating the housing (310) in the direction of the optical axis.

[0103] A bobbin may be placed inside the housing (310) (e.g., the opening of the housing (310)).

[0104] The bobbin may include an opening for mounting a plurality of lenses or a lens module (400) including a plurality of lenses and a lens barrel.

[0105] The opening of the bobbin may be a through hole that penetrates the bobbin in the direction of the optical axis and extends in the direction of the z-axis, and the shape of the opening of the bobbin may be circular, elliptical, or polygonal, but is not limited thereto.

[0106] A lens may be directly mounted in the opening of the bobbin, but is not limited thereto; in other embodiments, a lens barrel for mounting or coupling at least one lens may be coupled or mounted in the opening of the bobbin. The lens or lens barrel may be coupled to the inner circumference of the bobbin in various ways.

[0107] A coil receiving groove is formed on the back of the bobbin to mount a coil. The coil receiving groove is designed to secure the coil without it detaching from the groove through the use of fixing protrusions or the like.

[0108] A coil placed on the back surface of the bobbin allows the bobbin to move in the direction of the optical axis inside the housing (310) through electromagnetic interaction with a plurality of first magnets (201) placed on the substrate portion (200). Through this, the aforementioned autofocus (AF) function can be performed.

[0109] In order for the bobbin to move in the direction of the optical axis, the N pole (702) and S pole (701) of each first magnet (201) may be arranged in the z-axis direction, and the coil coupled to the bobbin may be arranged to face the side of the first magnet (201) facing the optical axis. The first magnet (201) may include a plurality of first magnet units arranged at each corner of the substrate portion (200).

[0110] The lens module (400) may include a plurality of lenses or a lens barrel in which a plurality of lenses are combined.

[0111] A plurality of lenses may include two or more lenses, and each of the plurality of lenses may be sequentially stacked and arranged in the direction of the optical axis within the lens barrel by means of a coupling projection for alignment or self-alignment.

[0112] In the case of FIGS. 1 to 3, the aperture module (500) is shown positioned above the lens module (400), but the embodiment is not limited thereto. The following description of the aperture module (500) may also apply when the aperture module (500) is positioned between multiple lenses.

[0113] Hereinafter, an aperture module (500) according to an embodiment of the present invention will be described with reference to FIGS. 4a to 5. FIGS. 4a to 4c are drawings illustrating an aperture module (500) according to an embodiment of the present invention, FIG. 4a is a drawing illustrating a blade part (500-1), FIG. 4b is a drawing illustrating a moving part (500-2), FIG. 4c is a drawing illustrating a fixed part (500-3), FIG. 5 is a drawing illustrating a bottom view of the coil part (800) of the fixed part (500-3) of FIG. 4c.

[0114] The aperture module (500) may largely include a blade portion (500-1), a moving portion (500-2), and a fixed portion (500-3). A third cover (103) may be a part of the aperture module (500). The third cover (103) is combined with the fixed portion (500-3) to form an internal space, and the blade portion (500-1) and the moving portion (500-2) may be disposed in the formed internal space.

[0115] In the aperture module (500), the fixed part (500-3) may be an element or configuration that is directly or indirectly coupled to the lens module (400) and does not rotate with respect to the optical axis. In the aperture module (500), the fixed part (500-3) may be a fixed element or configuration that moves the moving part (500-2) or drives the blade part (500-1). In the aperture module (500), the fixed part (500-3) may be expressed as a "fixed body."

[0116] Referring to FIG. 4c, the fixed part (500-3) of the aperture module (500) may include a stator (900, Stator, which can be replaced with "stator") and a coil part (800). These are merely examples and are not limited to these configurations, and may further include other configurations, such as a position sensor, a temperature sensor, a fixed member, a reinforcing member, etc. In the present invention, the third cover (103) is depicted as a separate component, but it may be considered to be included in the fixed part (500-3).

[0117] The stator (900) includes a disc-shaped body containing an opening and a side protruding in the z-axis direction on the outside of the body, and the side and the body include a fixed shaft (901) protruding in the z-axis direction. The fixed shaft (901) protrudes most in the z-axis direction from the stator (900) and forms the rotation center of each of the plurality of blades (610) by coupling, connecting, inserting, or penetrating the fixed shaft holes (613) of the plurality of blades (610) to be described later.

[0118] The fixed axis (901) is arranged point-symmetrically around the optical axis, and the number of fixed axes (901) may be equal to the number of blades (610).

[0119] The space between the fixed axis (901) may include a first space (910) and a second space (920).

[0120] The first space (910) may include a guide groove that provides a path for the cloud member (911), which will be described later, to be positioned and moved. Accordingly, the first space (910) may include a protrusion that protrudes in the direction of the optical axis from the side and has a guide groove positioned therein. The number of the first space (910) may be equal to the number of cloud members (911).

[0121] Unlike the first space (910), the second space (920) may not include a protrusion. At least a portion of each of the plurality of coils (820) of the coil portion (800), which will be described later, may be placed in the second space (920). Accordingly, the number of the second space (920) may be equal to the number of the plurality of coils (820).

[0122] Additionally, the second space (920) may include a through hole through which the substrate (810) of the coil section (800) can pass through the side and body. The substrate (810) of the coil section (800) includes a ring-shaped first substrate (811) on which a plurality of coils (820) are arranged, and a second substrate (812) formed extending from the first substrate (811). A terminal section (812-1) for applying an external voltage to the plurality of coils (820) is arranged on the second substrate (812). This terminal section (812-1) can be directly or indirectly connected to the circuit device of the aforementioned substrate section (200). To this end, the second substrate (812) can pass through the stator (900) through the through hole and be connected to the substrate section (200) or the upper elastic member, etc., which is positioned on the lower side of the aperture module (500).

[0123] Additionally, the body of the stator (900) includes a recessed groove (930) that is recessed in the -z-axis direction. The recessed groove (930) may contain at least a portion of a sensor (e.g., a position sensor (830), etc.) disposed on the bottom surface of the coil portion (800) to be described later. Accordingly, the number of recessed grooves (930) may be equal to the number of sensors.

[0124] The coil section (800) may include a plurality of coils (820), a substrate (810) on which the plurality of coils (820) are arranged (which may be replaced with "circuit board (810)"), and a position sensor (830) arranged between the plurality of coils (820) on the substrate (810) (however, it is not limited thereto, and various sensors such as temperature sensors may be arranged). Additionally, the substrate (810) further includes a first terminal to which the position sensor is connected, a second terminal connected to an external power source, etc., and a circuit element (not shown in the drawing) connecting each of the second terminal and the first terminal to the plurality of coils (820).

[0125] Additionally, the coil portion (800) may further include a protective material. The coil portion (800) illustrated in FIG. 5 is a diagram showing a substrate (810) and a plurality of coils (820) covered by a protective material and disposed inside the protective material. The protective material may be PSR (Photo Solder Resist), but is not necessarily limited thereto. However, the first terminal and the second terminal may be exposed without being covered by the protective material for electrical connection with the position sensor and the external power source, respectively.

[0126] As described above, the substrate (810) may include a first substrate (811) having a ring or disc shape and a second substrate (812) formed by extending from the second substrate (812).

[0127] At least some of a plurality of coils (820), a first terminal, a position sensor (830), and circuit elements may be disposed on the first substrate (811), and the remaining portion of a second terminal and circuit elements may be disposed on the second substrate (812).

[0128] The first substrate (811) may include a protrusion (811-1) that protrudes radially at the position where the coil is placed and has a shape corresponding to the shape of the coil when viewed in the z-axis direction. These protrusions (811-1) may be placed in the second space (920) of the aforementioned stator (900), and this structure may help to fix the coil portion (800) without rotating within the stator (900).

[0129] Additionally, each of the plurality of coils (820) may include at least one of an upper pattern coil disposed on the upper surface of the substrate (810) and a lower pattern coil disposed on the lower surface of the substrate (810), and when both the upper pattern coil and the lower pattern coil are included, the upper pattern coil and the lower pattern coil may be electrically connected through a via hole penetrating the substrate (810).

[0130] The upper pattern coil or the lower pattern coil includes a hollow and a spiral pattern shape extending outwardly and inwardly, and the spiral pattern may be a pattern formed by the pattern coil extending alternately in the circumferential and radial directions. A via hole may be formed on the hollow side, that is, on the innermost side of the pattern coil.

[0131] The magnitude of the thrust that rotates the moving part (500-2) can be adjusted by controlling the size, number, and number of turns of the coils.

[0132] Additionally, the coil portion (800) may include a position sensor that detects the rotational displacement of the ring magnet or rotor (520) by detecting the magnetic field of the ring magnet (700). For example, the position sensor may be placed or coupled on the lower or upper surface of the substrate (810).

[0133] For example, the position sensor may be a Hall sensor, a driver IC including a Hall sensor, an Anisotropic Magneto-Resistive (AMR) sensor, a Giant Magneto-Resistive (GMR) sensor, or a Tunnel Magneto-Resistive (TMR) sensor.

[0134] For example, if the position sensor is a Hall sensor or a TMR sensor, it is preferable to have two or more of them arranged to ensure high linearity with respect to the rotational displacement of the ring magnet (700), and in particular, in the case of the position sensor, it may be preferable for the two position sensors (830) to be arranged asymmetrically rather than symmetrically facing each other with respect to the optical axis.

[0135] In the aperture module (500), the moving part (500-2) may be an element or component that moves or rotates relative to the fixed part (500-3). In the aperture module (500), the moving part (500-2) may be replaced with a "rotating part."

[0136] For example, in the aperture module (500), the moving part (500-2) may include a rotor (520). Additionally, the moving part (500-2) may include at least one of the components coupled with the rotor (520), such as a support plate (510), a ring magnet (700) (a second magnet (700)), and a yoke (530). In the present invention, the blade part (500-1) is described as a separate component, but it may be considered to be included in the moving part (500-2). Such a configuration is merely an example and is not limited thereto, and other components may be additionally included.

[0137] The support plate (510) serves to support the blade, and the yoke (530) can serve to allow the second magnet (700) to be attached to the rotor (520) and to direct the magnetism of the second magnet (700) toward the coil portion (800).

[0138] The rotor (520) includes a movable axis (521) protruding in the z-axis direction. The movable axis (521) is arranged point-symmetrically with respect to the optical axis, and the number of movable axes (521) may be equal to the number of multiple blades (610). Accordingly, the number of movable axes (521) may also be equal to the number of fixed axes (901). The movable axis (521) may be coupled, connected, inserted, or penetrated with the movable axis holes (612) of the multiple blades (610) to be described later, thereby causing each of the multiple blades (610) to rotate around the fixed axis (901).

[0139] The second magnet (700) included in the moving part (500-2) will be described later.

[0140] The blade portion (500-1) may include a plurality of blades (610). Although FIG. 4a illustrates four blades (610) arranged on the upper and lower sides forming a single layer with a blade separator (620) in between, the embodiment is not limited thereto. That is, the blade separator (620) may or may not be included, and the number of the plurality of blades (610) may be eight or more, or eight or fewer. Additionally, it may be composed of one layer, or two or more layers.

[0141] Multiple blades (610) can form a variable opening (611) (hereinafter referred to as a "second opening") as they are arranged alternately or stacked. In the case of blades separated into multiple layers as shown in FIG. 4a, a variable opening (611) can be formed for each layer.

[0142] Each of the plurality of blades (610) may include an inner surface that is at least partially bent or curved. For example, the inner surface of each of the plurality of blades (610) may include a curved or concave portion. For example, the curved or concave portion of each of the plurality of blades (610) may be arranged in a rounded shape toward the optical axis.

[0143] The shape of the inner surface of each of the multiple blades (610) can determine the shape of the variable opening (611). The shape of the variable opening (611) viewed from above may be circular, polygonal, or a polygonal shape composed of curved sides.

[0144] The shape of the variable opening (611) does not necessarily have to be circular, but it may be desirable to be circular to reduce light scattering, light splitting, and flare phenomena. The number of blades required to make the variable opening (611) circular may vary depending on the curved shape of the inner surface of the plurality of blades (610).

[0145] Each of the plurality of blades (610) may include a movable shaft hole (612) into which the movable shaft (521) of the movable part (500-2) is inserted or passes, and a fixed shaft hole (613) into which the fixed shaft (901) of the fixed part (500-3) is inserted or passes. The movable shaft hole (612) may be expressed as a "drive shaft hole," "rotational shaft hole," "coupling hole," "guide hole," or "first hole (or second hole)." The fixed shaft hole (613) may be expressed as a "rotational shaft hole," "coupling hole," or "second hole (or first hole)."

[0146] The movable shaft hole (612) may be a hole extended in one direction in which the movable shaft (521) moves while the fixed shaft (901) is inserted into the fixed shaft hole (613). That is, the movable shaft hole (612) may correspond to the path in which the movable shaft (521) moves. For example, the movable shaft hole (612) may be extended to guide the path in which the movable shaft (521) moves. For example, the movable shaft hole (612) may be extended or formed at an angle to the rotational direction of the moving part (500-2).

[0147] With the movable axis (521) and the fixed axis (901) respectively fitted into the movable axis hole (612) and the fixed axis hole (613), as the movable part (500-2) rotates around the optical axis, the plurality of blades (610) can move or rotate within a preset range (e.g., the range in which the movable axis hole (612) is extended) around the fixed axis (901).

[0148] The size (e.g., diameter) of the variable opening (611) formed by the plurality of blades can be varied by the movement or motion of the plurality of blades (610) and the bent or curved inner surface of each of the blades (610). By controlling the movement of the plurality of blades (610), variable openings (611) having different sizes can be realized.

[0149] The aperture module (500) may include a rolling member (911) disposed between the moving part (500-2) (e.g., rotor (520)) and the fixed part (500-3) (e.g., stator (900)) to facilitate rotation or movement of the moving part (500-2) (e.g., rotor (520)). For example, at least a portion of the rolling member (911) may be in contact with the rotor (520). Also, for example, at least another portion of the rolling member (911) may be in contact with the stator (900).

[0150] The rolling member (911) can reduce friction between the rotor (520) and the stator (900) by performing rolling or sliding motion between the rotor (520) and the stator (900), thereby facilitating the movement of the rotor (520) and reducing the driving current or power consumption required to move the rotor (520).

[0151] The rolling member (911) may be represented as a ball, a ball member, or a ball bearing. For example, the rolling member (911) may be made of metal, plastic, or resin, but is not limited thereto. The rolling member (911) may have a circular shape and may have a diameter of a size sufficient to support the movement of the rotor (520) (moving part (500-2)).

[0152] For example, the rolling member (911) may include a plurality of balls. In an embodiment of the present invention, the number of rolling members (911) is four, but in other embodiments, there may be two or three, or five or more. For example, the rolling member (911) may include a plurality of balls of different sizes.

[0153] At least one guide groove may be formed in the rotor (520) and the stator (900) to facilitate the placement or seating of the rolling member (911) and to guide its movement. The guide groove may be expressed as a "groove" or "path groove." For example, the number of guide grooves may be equal to the number of rolling members (911). For example, the guide groove of the rotor (520) and the guide groove of the stator (900) may face each other, and as the rotor (520) and the stator (900) are arranged vertically, a guide space capable of accommodating the rolling member (911) vertically may be provided.

[0154] The aperture module (500) (e.g., moving part (500-2)) may include a ring magnet (700) (second magnet (700)) that rotates around an optical axis. The center of the ring magnet (700) may overlap with the optical axis.

[0155] The ring magnet (700) may face or overlap with a plurality of coils (820) of the coil section (800) in the direction of the optical axis, and may move through interaction with the plurality of coils (820) by electromagnetic force or rotate within a preset range centered on the optical axis (e.g., can be determined by the extension range of the movement axis hole (612)). The ring magnet (700) may rotate the rotor (520) together with the rotor (520) as it is fixedly coupled to the bottom surface of the rotor (520).

[0156] The ring magnet (700) may have an annular shape including a hollow. Additionally, the ring magnet (700) may include a flat portion (700A) having a flat shape on at least a portion of its outer surface. The rotor (520) may include a protrusion (520A) that includes a flat portion (520B) facing the flat portion (700A) of the ring magnet (700). The flat shape of the ring magnet (700) formed by the flat portion (700A) may correspond to the bottom shape of the rotor (520) formed by the protrusion (520A). The protrusion (520A) of the rotor (520) may serve to guide the ring magnet (700) to be assembled or coupled in the correct position when the ring magnet (700) is coupled to the rotor (520), and to prevent the ring magnet (700) from rotating within the rotor (520).

[0157] The number of planar sections (700A) may be one or more. The number of planar sections (700A) may be determined by the number of protrusions (520A) or planar sections (520B) of the rotor (520), and these may be subject to change depending on the design of the rotor (520). Additionally, in FIG. 4b, a plurality of planar sections (700A) are shown symmetrical to each other, and the center of the planar section (700A) overlaps with the contact surface of the N pole (702) and S pole (701) of the ring magnet, but this is merely an example and is not necessarily limited to this shape.

[0158] The ring magnet (700) may include a plurality of magnet units (710). The magnet unit may be a single-pole magnet of N or S poles, a two-pole magnet of N and S poles arranged in a circumferential direction, a two-pole magnet of N and S poles arranged in a direction parallel to the optical axis, or a four-pole magnet in which N and S poles are alternately arranged in a circumferential direction and a direction parallel to the optical axis. For convenience of explanation in the following description and drawings, the magnet unit (710) will be described as a two-pole magnet including N poles (702) and S poles (701) arranged in a circumferential direction.

[0159] The number of magnet units (710) may be two, three, or more. Multiple magnet units (710) may be arranged so that the N pole (702) and the S pole (701) alternate with each other in the circumferential direction to form a ring shape. That is, the parts where two adjacent magnet units (710) come into contact with each other may have opposite polarities.

[0160] The ring magnet (700) can be arranged such that each pole is symmetrical with respect to the center of the ring magnet (700). As a result, the ring magnet (700) can have the following characteristics.

[0161] The angle formed by the center of each magnet unit (710) with respect to the center of the ring magnet (700) may be the same as the angle formed by the contact surface between the magnet units (710). Additionally, the angle formed by the center of each magnet unit (710) may be the same as the angle formed by the center of an adjacent S pole (701) or the angle formed by the center of an adjacent N pole (702).

[0162] Additionally, the angle between the centers of each pole (including both the N pole (702) and the S pole (701)) constituting the ring magnet (700) may be equal to each other ('equal' means equal within the margin of error). Additionally, the angle between the centers of each pole (701, 702) may be equal to the angle formed by the surfaces where each pole (701, 702) contacts. The angle between the surfaces where the N pole (702) and the S pole (701) contact each other may be equal to the angle between the centers of the N pole (702) and the S pole (701).

[0163] Regardless of whether the number of magnet units (710) constituting the ring magnet (700) is odd or even, the total number of poles constituting the ring magnet (700) may be an even number (number of magnet units (710) * 2 poles).

[0164] Additionally, the center of each magnet unit (710) may be a concept corresponding to the center of the N pole (702) or S pole (701) included in the ring magnet (700), or the center of the contact surface between adjacent magnet units (710).

[0165] The following describes the magnetic field interference phenomenon of the lens driving device (10) according to a comparative example with reference to FIGS. 6a to 8c. The ring magnet (700) may include a flat portion (700A) formed on the outer surface as shown in FIG. 4b, but this has been omitted for convenience in FIGS. 6a to 8c.

[0166] FIGS. 6a to 6d are plan views showing a lens driving device (10) including an aperture module (500) as viewed from direction A, and do not show the configuration of the rest except for the substrate part (200), the first magnet (201), and the second magnet (700), which is a ring magnet. FIGS. 6a and 6c show the case where there are 4 magnet units (710) (8 poles), and FIGS. 6b and 6d show the case where there are 8 magnet units (710) (16 poles).

[0167] In FIGS. 2 and 3, the first magnet (201) and the second magnet (700) are depicted as not overlapping in a direction perpendicular to the optical axis (e.g., x-axis direction or y-axis direction), but the embodiment is not necessarily limited thereto and at least a portion of the second magnet (700) may overlap with the first magnet (201) in a direction perpendicular to the optical axis.

[0168] As described above, the two poles of the first magnet (201) can be arranged in the z-axis direction. Since the second magnet (700) is located close to the upper side of the first magnet (201), the pole located on the upper side of the first magnet (201) can exert magnetic field interference on the second magnet (700), whether or not at least a portion of the first magnet (201) and the second magnet (700) overlap in the direction perpendicular to the optical axis.

[0169] In the following, a first magnet (201) having an N pole (702) on the upper side and an S pole (701) on the lower side will be described as an example. Accordingly, the shaded portion of the second magnet (700) shown in FIGS. 6a to 8c is considered to be the S pole (701). It is obvious that the following description applies equally even when the shaded portion is the N pole (702) and the unshaded portion is the S pole (701). The N pole (702) of the second magnet (700) can generate a repulsive force with the N pole of the first magnet (201), and the S pole (701) of the second magnet (700) can generate an attractive force with the N pole of the first magnet (201). Therefore, the second magnet (700) may show a tendency to rotate so that the S pole (701) faces the N pole of the first magnet (201).

[0170] For convenience of explanation and understanding, in FIGS. 6a to 6d, the first magnet units (210) are shown as A-1 magnet placed on the upper left, A-2 magnet placed on the upper right, A-3 magnet placed on the lower right, and A-4 magnet placed on the lower left, and imaginary lines passing through the centers of A-1 magnet to A-4 magnet from the center or optical axis of the second magnet (700) are shown as PA-1, PA-2, PA-3, and PA-4, respectively. Additionally, in FIGS. 6a to 6d, a plurality of S poles positioned adjacent to magnets A-1 to A-4 among the second magnets (700) are illustrated in order as magnets S-1 to S-4 in a clockwise direction, and imaginary lines passing through the center of magnets S-1 to S-4 from the center or optical axis of the second magnet (700) are illustrated as PS-1, PS-2, PS-3, and PS-4, respectively. Hereinafter, for convenience, PA-1 to PA-4 are collectively referred to as PA, and PS-1 to PS-4 are collectively referred to as PS.

[0171] The center of the S-1 to S-4 magnets of the second magnet is the center of the curve forming the outer surface of the S-1 to S-4 magnets of the second magnet when viewed from a top view, and the center of the A-1 to A-4 magnets of the first magnet units (210) is the center of the side forming the inner surface of the A-1 to A-4 magnets when viewed from a top view, and the inner surface of the A-1 to A-4 magnets is the surface facing the second magnet.

[0172] PA is equal to the number of first magnet units (201), and PS may be equal to the number of S poles (701) of the second magnet (700) (which is equal to the number of multiple magnet units (710)). An imaginary line passing through the optical axis and the center of each of the multiple magnet units (710) may correspond to PS as the second magnet (700) rotates about the optical axis.

[0173] Referring to FIGS. 6a and 6b, the upper pole (hereinafter, N pole) of the first magnet (201) can generate a rotational force that causes the S pole (701) of the second magnet (700) to be positioned in the x-axis or y-axis direction by creating an attractive force with the S pole (701) of the second magnet (700). Accordingly, in the case of FIG. 6a, the second magnet (700) receives a force that causes the S poles (S-1 to S-4) to rotate by θ1, and in the case of FIG. 6b, the second magnet (700) receives a force that causes the S poles (S-1 to S-4) to rotate by θ2. As a result, as shown in FIG. 6c and 6d, PA and PS can be completely superimposed. That is, PA-1 and PS-1, PA-2 and PS-2, PA-3 and PS-3, and PA-4 and PS-4 can each be superimposed. In this case, since a strong attractive force (magnetic field interference) acts between the N pole of the first magnet (201) and the S pole of the second magnet (700), the second magnet (700) can be fixed without rotating even if it receives a Lorentz force from the coil.

[0174] As illustrated in FIGS. 6a and 6b, when the number of magnet units (710) constituting the second magnet (700) within the angle formed by adjacent PAs is a multiple of a natural number (this may correspond to the case where the product of the 'number of first magnets (201)' and the natural number is equal to the 'number of multiple magnet units (710) constituting the second magnet (700)'), at least a portion of the PS overlaps with all PAs. In this case, the magnetic field interference of the first magnet (201) becomes maximum, making it difficult to drive the aperture module (500).

[0175] Therefore, in order to reduce or prevent such magnetic field interference phenomena, the present invention proposes a structure in which part or all of PA does not overlap with PS, that is, intersects with P2.

[0176] This is explained with reference to FIGS. 7a and 7b. FIGS. 7a and 7b are plan views of a lens driving device (10) according to an embodiment, and, like FIGS. 6a and 6b, are plan views taken from A, and the remaining components, excluding the substrate part (200), the first magnet (201), and the second magnet (700), are not shown. FIG. 7a shows the case where the number of multiple magnet units (710) is 5 (10 poles), and FIG. 7b shows the case where the number of multiple magnet units (710) is 6 (16 poles).

[0177] FIGS. 7a and 7b, like FIGS. 6a to 6d, show the first magnet units (210) as A-1 magnet placed on the upper left, A-2 magnet placed on the upper right, A-3 magnet placed on the lower right, and A-4 magnet placed on the lower left, and the imaginary lines passing through the centers of A-1 magnet to A-4 magnet from the center or optical axis of the second magnet (700) are shown as PA-1, PA-2, PA-3, and PA-4, respectively. In addition, the S pole of the second magnet facing the A-1 magnet among the second magnets is illustrated as the S-1 magnet, and numbers are assigned sequentially in a clockwise direction therefrom to the S-2 to S-5 magnets in FIG. 7a (an imaginary line passing through the center of the S-1 to S-5 magnets from the center of the second magnet (700) is illustrated as PS-1 to PS-5), and the S-2 to S-6 magnets in FIG. 7b (likewise, an imaginary line passing through the center of the S-1 to S-6 magnets is illustrated as PS-1 to PS-6). Hereinafter, for convenience, PA-1 to PA-4 are collectively referred to as PA, and PS-1 to PS-5 or PS-1 to PS-6 are collectively referred to as PS. FIGS. 7a and 7b, like FIGS. 6a to 6d, are illustrated with the first magnet units (210) as A-1 magnet placed on the upper left, A-2 magnet placed on the upper right, A-3 magnet placed on the lower right, and A-4 magnet placed on the lower left, and an imaginary line passing through the center of A-1 magnet to A-4 magnet from the center of the second magnet (700) or the optical axis is illustrated as PA-1, PA-2, PA-3, and PA-4, respectively.Additionally, the S pole of the second magnet facing the A-1 magnet among the second magnets is illustrated as the S-1 magnet, and numbers are assigned sequentially in a clockwise direction therefrom. In FIG. 7a, the S-2 to S-5 magnets are illustrated (an imaginary line passing through the center of the S-1 to S-5 magnets from the center of the second magnet (700) is illustrated as PS-1 to PS-5), and in FIG. 7b, the S-2 to S-6 magnets are illustrated (likewise, an imaginary line passing through the center of the S-1 to S-6 magnets is illustrated as PS-1 to PS-6). Hereinafter, for convenience, PA-1 to PA-4 are collectively referred to as PA, and PS-1 to PS-5 or PS-1 to PS-6 are collectively referred to as PS.

[0178] When the number of first magnets (201) is 4, or when the number of multiple magnet units (710) is not a multiple of 4, for example, 5 or 6, only some of the PAs may overlap with some of the PSs as shown. In the case of FIG. 7a, only 1 PA may overlap with some of the PSs, and in the case of FIG. 7b, only 2 PAs may overlap with some of the PSs. In FIG. 7a, only PA-1 and PS-1 overlap, and in FIG. 7b, only PA-1 and PS-1, and PA-3 and PS-4 may overlap.

[0179] In this case, unlike in FIGS. 6a and 6b, not all PAs (PA-1 to PA-4) overlap with PS, that is, only a part of PA overlaps with PS, so the magnetic field interference of the first magnet (201) is reduced, and this may not affect the driving of the aperture module (500) by the coil.

[0180] In order to ensure that all PAs do not overlap with PS, the angle formed by adjacent PAs and the angle formed by two PSs must not be the same angle, which means that the natural number product of the angle formed by adjacent PSs must not match the angle between adjacent PAs. The number of PAs is equal to the number of first magnets (201), and the angle formed by adjacent PAs is the number obtained by dividing 360 degrees by the number of first magnet units (201). This applies equally to the second magnet (700). The condition that all PAs do not overlap with PS may be that the number of magnet units (710) constituting the second magnet (700) within the angle formed by adjacent PAs does not form a multiple of a natural number, or that the natural number product of the number of first magnets (201) is not equal to the number of multiple magnet units (710) constituting the second magnet (700).

[0181] According to this, for example, when the number of PAs (number of first magnet units (201)) is 4, the number of second virtual lines (PS) (number of S poles (701) of the second magnet (700) or number of magnet units (710)) may be 3, 5, 6, 7, 9, or 11.

[0182] The following describes the design of the coil, fixed shaft (901), and rolling member according to the number of magnet units (710) with reference to FIGS. 8a to 8c. FIGS. 8a to 8c are plan views of the aperture module (500) viewed from direction A, and the configuration of the remaining parts, excluding the second magnet (700), a plurality of coils (820), a position sensor (830), a fixed shaft (901), and a rolling member (911), is not shown.

[0183] The hatched circles in FIGS. 8a to 8c represent the fixing pins, the white circles represent the cloud members, and the checkered squares represent the position sensors (830).

[0184] The number of multiple coils (820) can be determined according to the number of magnet units (710). The number of multiple coils (820) may be any one of two to the number of poles constituting the second magnet (700).

[0185] In order for each of the multiple coils (820) to generate rotational force in the same direction, the area occupied by the N pole (702) and the S pole (701) of the second magnet (700) within the area overlapping each of the multiple coils (820) in a direction parallel to the optical axis, as shown in FIG. 8a and FIG. 8c, must be the same. In this case, current can flow in the multiple coils (820) in the same rotational direction.

[0186] Alternatively, as shown in FIG. 8b, two types of coils may be included having an overlapping area where the area occupied by the N pole (702) and the area occupied by the S pole (701) are opposite to each other. In this case, current may flow in opposite rotational directions in the two types of coils. For example, if current flows clockwise in the three coils at the same location as in FIG. 8a in FIG. 8c, the area occupied by the S pole (701) and N pole (702) of the second magnet (700) that overlaps with the remaining three coils is opposite to the area occupied by the S pole (701) and N pole (702) of the second magnet (700) that overlaps with the three coils at the same location as in FIG. 8a, and in this case, current may flow counterclockwise.

[0187] In order for the coils to be arranged in this manner, each of the plurality of coils (820) may be arranged point-symmetrically with respect to the optical axis, or plane-symmetrically with respect to a plane containing the optical axis (or line-symmetrically with respect to an imaginary line perpendicular to the optical axis). In addition, in this case, the position or number of poles of the second magnet (700) must also be taken into account.

[0188] The number of coils satisfying this can be a factor of the number of poles constituting the second magnet (700) (defined as a set of divisors excluding 1 and itself). When the number of poles constituting the second magnet (700) is 12 poles, the factors of 12 are 2, 3, 4, and 6, so the plurality of coils (820) can be 2, 3, 4, or 6.

[0189] A plurality of coils (820) can be arranged such that three coils are point-symmetric with respect to the optical axis at θ3 (120 degrees) as in FIG. 8a, four coils are arranged such that they are point-symmetric with respect to the optical axis at θ4 (90 degrees) as in FIG. 8b, or are arranged such that they are line-symmetric with respect to the S1 plane, and are arranged such that they are line-symmetric with respect to the S2 plane as in FIG. 8c.

[0190] Below, we examine the relationship between the multiple coils (820), the fixed shaft (901), and the rolling member.

[0191] As illustrated in FIG. 4c, the guide groove in which the rolling member (911) is placed is in the first space (910) among the multiple spaces formed by adjacent fixed axes (901), and the coil is placed in the second space (920) among the multiple spaces. Accordingly, the multiple coils (820), fixed axes (901), and rolling members may not overlap each other in the z-axis direction.

[0192] Additionally, as described above, a plurality of coils (820) are arranged such that a number corresponding to the factor of the number of poles constituting the second magnet (700) is point-symmetric with respect to the optical axis or line-symmetric with respect to a plane including the optical axis, and the fixed axis (901) and the rolling member (911) are also arranged point-symmetric with respect to the optical axis.

[0193] Ultimately, a cloud member (911) must be placed in a space that is point-symmetric with respect to the optical axis among the interspaces (equal to the number of fixed axes (901)) formed by multiple fixed axes (901), and multiple coils (820) may be placed point-symmetric or line-symmetric in at least a part of the other space.

[0194] The number of fixed shafts (901) satisfying this can be the number of rolling members (911) multiplied by a natural number greater than or equal to 2, and the number of multiple coils (820) can be the same value as the value obtained by limiting the number of rolling members (911) from the number of fixed shafts (901) among the factors of the number of poles of the second magnet (700).

[0195] However, the above conditions may be applied when only the number of magnet units (710) constituting the second magnet (700) is changed while maintaining the same design conditions for other configurations. Therefore, if the design is such that the diameter of the stator (900) is increased so that multiple coils (820) are not placed in the space between the fixed shafts (901) (second space (920)), the above conditions must not necessarily be satisfied.

[0196] It may be preferable that there be at least three or more rolling members (911) so that the moving part (500-2) can rotate smoothly within the fixed part (500-3).

[0197] For example, if the number of poles of the second magnet (700) is 12 (factors are 2, 3, 4, 6) and the number of rolling members (911) is 3, the number of fixed shafts (901) (number of rolling members (911) * 2 or greater natural number) may be 6, 9, or 12, and since the value obtained by subtracting the number of rolling members (911) from the number of fixed shafts (901) is 3, 6, or 9, the number of multiple coils (820) may be 3 or 6 (see FIG. 8a and FIG. 8c).

[0198] For example, if the number of poles of the second magnet (700) is 12 (factors are 2, 3, 4, 6) and the number of rolling members (911) is 4, the number of fixed shafts (901) (number of rolling members (911) * 2 or greater natural number) can be 8 or 12, and since the value obtained by subtracting the number of rolling members (911) from the number of fixed shafts (901) is 4 or 8, the number of multiple coils (820) can be 4 (see FIG. 8b).

[0199] Accordingly, when the number of poles of the second magnet (700) is 12, the fixed shaft (901) may be 8 or 9, and the rolling member (911) may be 3 or 4. This means that as long as the above conditions are satisfied, the aperture module (500) (e.g., the number or position of multiple coils (820), fixed shafts (901), and rolling member (911), etc.) can be designed in a more diverse way.

[0200] Thus, the embodiment of the present invention adjusts the number of poles of the second magnet (700) to appropriately adjust the positions of the poles of the first magnet (201) and the second magnet (700) to cancel out magnetic field interference, thereby enabling the smooth operation of the aperture module (500).

[0201] In addition, the embodiment allows for a more free design of the aperture module (500) by increasing the number of poles of the second magnet (700) to ensure diversity in the number or position of multiple coils (820), fixed shafts (901), and rolling members (911) inside the aperture module (500).

[0202] The aperture module (500) and lens driving device (10) according to the embodiment of the present invention are not limited to the configuration described above. That is, the aperture module (500) and lens driving device (10) according to the embodiment may also be applied to an aperture module (500) having a configuration different from the configuration described above.

[0203] Hereinafter, the structure of a blade portion applicable to an aperture module according to an embodiment of the present invention will be explained with reference to FIGS. 9 to 13.

[0204] In the following, the stator may be represented as a support member, the fixed shaft as a rotating shaft, the fixed shaft hole as a rotating shaft hole, the movable shaft as a driving shaft, the movable shaft hole as a driving shaft hole, and the variable opening formed by a plurality of blades as a light incident opening. Additionally, the drawing symbols are also explained using symbols distinct from those in FIGS. 1 to 8c.

[0205] The aperture module may comprise a support member (100), a rotor (200), and a blade member (300) stacked in sequence.

[0206] The support member (100) includes a first opening (101) that overlaps with a lens (not shown) and supports the rotor (200) and the blade member (300).

[0207] The rotor (200) is rotatably disposed on the support member (100) around the optical axis (OA) and includes a lens and a second opening (201) that overlaps with the first opening (101), and supports the blade member (300).

[0208] The blade portion (300) is formed in three layers in a direction perpendicular to the optical axis (OA) and is equipped with nine blades that are each rotatably arranged in conjunction with the rotation of the rotor (200) to form light incident apertures of various sizes.

[0209] FIG. 9 is a perspective view showing that the blade portion of the aperture module according to the present invention is composed of three layers, and FIG. 10a and FIG. 10b are exemplary diagrams showing the shape according to the operation of the blade portion in the aperture module according to one embodiment of the present invention. FIG. 11a and FIG. 11b are exemplary diagrams showing the shape according to the operation of the blade portion in the aperture module according to another embodiment of the present invention. The shape of the blade shown in the first embodiment of FIG. 10a and FIG. 10b is different from the shape of the blade in FIG. 11a and FIG. 11b only in that the positions of the rotation axis holes (311a ~ 319a) and the drive axis holes (311b ~ 319b) differ from each other. A plurality of drive axes (211~219) formed in the rotor (200) rotate each blade (311~319) by moving along the drive axis holes (311b ~ 319b) according to the counterclockwise rotation of the rotor (200). In other words, although the positions of the rotation shaft hole and the drive shaft hole are arranged differently in the two embodiments, the operating principle is the same.

[0210] The blade portion (300) according to the present invention consists of three layers (300-1L, 300-2L, 300-3L) in a direction perpendicular to the optical axis and is composed of a total of nine blades. Three blades are arranged in each layer. The third blade (313), the sixth blade (316), and the ninth blade (319) are arranged in the first layer (300-1L), which is the lowest layer. The second blade (312), the fifth blade (315), and the eighth blade (318) are arranged in the second layer (300-2L), which is the middle layer. The first blade (311), the fourth blade (314), and the seventh blade (317) are arranged in the third layer (300-3L), which is the uppermost layer.

[0211] FIG. 10a shows the blade portion (300) forming the maximum light incident aperture, and FIG. 10b shows the blade portion (300) forming the minimum light incident aperture.

[0212] Each blade (311-319) is formed such that the inner surface of the blade body adjacent to the optical axis has a curved portion, and the outer surface of the blade body has at least one inflection portion.

[0213] The plurality of blades (311~319) are formed to include a shielding area that shields a light incident opening by rotating around a rotation axis (111~119) protruding from the support member (100) inserted into the rotation axis hole (311a~319a), and a driving section in which the drive axes (211~219) of a rotor (200) inserted into the drive axis hole (311b~319b) and rotating move along the slit of the drive axis hole (311b~319b).

[0214] When viewed from the direction of the optical axis, the first blade (311) to the ninth blade (319) are displayed in a clockwise order. As shown in FIG. 10a, for the three blades (311, 314, 317) placed on the same layer, for example, the top layer (300-3L), in a direction perpendicular to the optical axis, the angle (θ1) formed by the plurality of virtual lines (VL1-1, VL1-2, VL1-3) connecting each rotation axis hole (311a, 314a, 317a) and the optical axis can be 120°.

[0215] As illustrated in FIG. 10b, for two blades (311 and 319) of different layers (300-3L and 300-1L) placed adjacent to each other in the direction of the optical axis, the angle (θ2) formed by the virtual line (VL1-1) connecting the rotation axis hole (311a) of the upper layer (300-3L) blade (311) and the optical axis connecting the rotation axis hole (319a) of the lower layer (300-1L) blade (319) can be 35° to 45°. When the blades of each layer (300-1L to 300-3L) are placed at equal intervals, multiple virtual lines can be 40° apart.

[0216] The angle between the blade (313) of the lowest layer (300-1L) and the blade (312) of the middle layer (300-2L) may be 35°, and the angle between the blade (312) of the middle layer (300-2L) and the blade (311) of the top layer (300-1L) may be 40°. That is, the lowest layer (300-1L) and the middle layer (300-2L), and the middle layer (300-2L) and the top layer (300-3L) may be arranged slightly offset from each other. When an actuator, etc. is designed to be inserted between the drive shafts (211~219) inserted into the rotation shaft holes (311a~319a) and drive shaft holes (311b~319b) of each blade (311~319), the drive shaft between each blade may be formed by shifting it by about 5°. Therefore, the design freedom of the actuator structure is improved. However, if the gap exceeds 5°, the overlapping area between the upper and lower blades is eliminated, and the blades may get caught on each other, causing a defect in aperture operation.

[0217] At this time, each of the three blades arranged in the same layer in a direction perpendicular to the optical axis does not overlap in the direction of the optical axis throughout the entire rotational movement section. That is, as shown in FIG. 10a, the third blade (313), the sixth blade (316), and the ninth blade (319) of the first layer (300-1L), which is the lowest layer forming the maximum light incident aperture, do not overlap each other when rotated counterclockwise to have the minimum size light incident aperture as shown in FIG. 10b by the aperture operation. This is also the case for the operation of the second blade (312), the fifth blade (315), and the eighth blade (318) of the middle layer (300-2L), and for the rotational operation of the first blade (311), the fourth blade (314), and the seventh blade (317) of the top layer (300-3L).

[0218] Meanwhile, any one blade placed in the upper layer may be supported by always overlapping with two blades in the lower layer. For example, the first blade (311) of the top layer (300-3L) is supported by the two blades (312, 318) by always overlapping in a vertical direction with the second blade (312) and the eighth blade (318) of the middle layer (300-2L). The fourth blade (314) of the top layer (300-3L) is supported by the two blades (312, 315) by always overlapping in a vertical direction with the second blade (312) and the fifth blade (315) of the middle layer (300-2L). The 7th blade (317) of the top layer (300-3L) is partially overlapped vertically with the 5th blade (315) and the 8th blade (315) of the middle layer (300-2L) and is supported by two blades (315, 318). Likewise, the 2nd blade (312) of the middle layer (300-2L) is partially overlapped vertically with the 3rd blade (313) and the 9th blade (319) of the bottom layer (300-1L) and is supported by two blades (313, 319). The 5th blade (315) of the middle layer (300-2L) is always partially overlapped vertically with the 3rd blade (313) and the 6th blade (316) of the bottom layer (300-1L) and is supported by two blades (313, 316). The 8th blade (318) of the middle layer (300-2L) is partially overlapped in the vertical direction with the 6th blade (316) and the 9th blade (319) of the lowest layer (300-1L) and is supported by the two blades (316, 319).

[0219] Interlayer support is provided only if there is an overlapping area in all situations, regardless of the size of the optical incident aperture. Interference between drives means that a blade that should be on another layer moves up or sags down, causing it to get caught on a blade on another layer. Blades within the same layer do not overlap.

[0220] As shown in FIG. 10a and FIG. 11a, when the size of the light incident aperture formed by the nine blades (311-319) is the largest, the distance (d1) between the rotation axis holes (311a-319a) and the drive axis holes (311b-319b) of each blade (311-319) is the shortest.

[0221] As shown in FIG. 10b and FIG. 11b, when the size of the light incident aperture formed by the nine blades (311-319) is the smallest, the distance (d2) between the rotation axis holes (311a-319a) and the drive axis holes (311b-319b) of each blade (311-319) is the longest.

[0222] When the amount of light incident on the lens is at its maximum, the amount of light incident on the lens is determined by the inner surface adjacent to each rotation axis hole (311a~319a) of each blade (311), and as the amount of light incident on the lens decreases from its maximum, the amount of light incident on the lens can be determined by the inner surface of each blade body adjacent to the optical axis.

[0223] FIG. 12 is an exemplary diagram showing the shape of a light incident aperture formed by an aperture module according to an embodiment of the present invention. As shown, the light incident aperture (400) formed by nine blades (311 to 319) has a nonagonal shape due to the inner surfaces of the nine blades. While the light incident aperture formed by an aperture having an even number of blades, namely four, six, and eight blades, is point-symmetric with respect to its center point, the shape of the light incident aperture (400) formed by the aperture module according to the present invention is asymmetric with respect to its center point (410). This can have the effect of making the diffraction phenomenon appear less prominent.

[0224] FIG. 13 is an example diagram showing the change in the shape of the light incident aperture when the blades constituting the aperture module are changed. (A) shows a light incident aperture by an aperture composed of 6 blades forming 2 layers, (B) shows a light incident aperture by an aperture composed of 8 blades forming 5 layers, and (C) shows a light incident aperture by an aperture operation composed of 9 blades divided and arranged in 3 layers as in the embodiment of the present invention.

[0225] Designing the blades to be long is advantageous for realizing a circular shape, but the blades must not overlap on the same layer. Therefore, when configuring eight blades by dividing them across two layers, if four blades are placed on one layer, the blades become short and it is difficult to realize a circular shape. Therefore, an aperture module with eight blades is configured by placing two blades on each of the four layers. In this case, when implementing with two blades on each of the four layers, interference occurs between the second and third layers, so an intermediate support layer must be placed between them.

[0226] On the other hand, the aperture according to the present invention has nine blades arranged in three layers, thereby enabling the realization of a desired target focus (F#) and allowing for changes in the depth of field of the subject according to the F-value. Under the same design criteria, an aperture composed of nine blades can exhibit a light incident aperture that is much closer to a circle.

[0227] As described above, the aperture module according to the present invention can form a light incident aperture that is close to a circle compared to an aperture module composed of 6 or 8 blades by arranging 9 blades in groups of 3 in 3 layers so as not to overlap each other. In addition, the blades are asymmetrical with respect to the center of the light incident aperture, which can produce the effect of making diffraction phenomena less prominent.

[0228] Although the present invention has been described above with reference to preferred embodiments, those skilled in the art will understand that various modifications and changes can be made to the invention without departing from the spirit and scope of the invention as described in the following claims.

[0229] Although only a few examples have been described as previously stated, various other forms of implementation are possible. The technical details of the previously described embodiments can be combined in various forms, provided they are not mutually incompatible, and can be implemented in new forms through this combination.

[0230] It is obvious to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit and essential features of the invention. Accordingly, the foregoing detailed description should not be interpreted restrictively in all respects but should be considered exemplary. The scope of the invention shall be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the invention are included within the scope of the invention.

[0231] One embodiment of the present invention can be used in an aperture module capable of reducing magnetic field interference between an AF magnet and a ring magnet, and in a lens driving device including the same.

Claims

1. A first magnet comprising a plurality of spaced-apart first magnet units; and Includes an aperture module, The above aperture module is A coil section including a plurality of coils; and It includes a ring-shaped second magnet that faces the coil portion and interacts with the coil portion to rotate about a first axis, and The second magnet above includes a plurality of N poles and a plurality of S poles arranged alternately with each other, and The above plurality of first magnet units are, It includes a 1-1 magnet unit and a 1-2 magnet unit adjacent to the 1-1 magnet unit, and The plurality of S poles of the second magnet include a first S pole and a second S pole adjacent to the first S pole, and When a virtual 1-1 line perpendicular to the first axis and passing through the center of the 1-1 magnet unit and the first axis, and a virtual 2-1 line perpendicular to the first axis and passing through the center of the first S pole and the first axis overlap when viewed in a plane (Top view), A virtual first-2 line perpendicular to the first axis and passing through the center of the first-2 magnet unit and the first axis, and a virtual second-2 line perpendicular to the first axis and passing through the center of the second S pole and the first axis do not overlap when viewed in a top view. Camera module.

2. In Paragraph 1, A camera module in which the first magnet and the second magnet do not overlap in a direction parallel to the first axis.

3. In Paragraph 1, The center of the above-mentioned first-1 magnet is the center of the side forming the inner surface of the above-mentioned first-1 magnet, and A camera module in which the center of the first-2 magnet is the center of the side forming the inner surface of the first-2 magnet.

4. In Paragraph 3, A camera module in which, when viewed from a top view, the first angle formed by the first-1 line and the first-2 line and the second angle formed by the second-1 line and the second-2 line satisfy the following relationship. Angle 1 ≠ Angle 2 * N (where N is a natural number greater than or equal to 1) 5. In Paragraph 3, The above aperture module is, A fixed part on which the above coil part is placed; A moving part on which the above-mentioned second magnet is placed; A camera module comprising a blade portion that is combined with the fixed portion and the movable portion to form a variable opening.

6. In Paragraph 5, The above-mentioned moving part includes a protrusion disposed on the outer side of the second magnet, and the inner surface of the protrusion has a flat surface. The above second magnet is A camera module comprising a flat portion formed on an outer surface, wherein the flat portion faces the inner surface of the protrusion.

7. A camera module according to claim 5, wherein the plurality of coils are symmetrically arranged with respect to a virtual plane including the first axis.

8. In claim 7, further comprising a plurality of position sensors disposed in the coil portion, A camera module in which the plurality of position sensors are disposed between the plurality of coils and are arranged asymmetrically with respect to the first axis.

9. In claim 5, further comprising a ring-shaped yoke disposed between the second magnet and the moving part, Camera module.

10. In claim 5, the blade portion is, It includes a plurality of blade layers stacked in the direction of the first axis, wherein each of the plurality of blade layers includes a plurality of blades. Camera module.

11. A camera module according to claim 10, wherein the plurality of blades included in the blade layer are arranged symmetrically with respect to the first axis.

12. In claim 5, the fixed member comprises a plurality of fixed axes spaced apart at the same angle with respect to the first axis, and The above moving part includes a plurality of moving axes spaced apart at the same angle with respect to the first axis, and Each of the plurality of blades includes a fixed shaft hole coupled to the fixed shaft and a movable shaft hole coupled to the movable shaft. Camera module.

13. In Paragraph 12, It further includes a rolling member disposed between the fixed part and the movable part, and The plurality of coil units are disposed in a first space among a plurality of spaces formed between the plurality of fixed axes, and The above cloud member is a camera module disposed in a second space other than the first space among the plurality of spaces.

14. In Paragraph 12, It further includes a rolling member disposed between the fixed part and the movable part, and A camera module in which the above-mentioned cloud member, the above-mentioned plurality of coils, and the above-mentioned plurality of fixed axes do not overlap in a direction parallel to the first axis.

15. In Paragraph 12, The blade rotates about the fixed axis as the moving axis rotates about the first axis, and A camera module having a movable axis hole having a path for rotating the blades such that as the movable axis rotates and approaches the fixed axis, the variable opening formed by the plurality of blades becomes larger.

16. In claim 12, the blade portion A camera module forming a variable aperture that becomes larger as the distance between the moving axis and the fixed axis coupled to the blade decreases.

17. In claim 12, the blade portion comprises three blade layers, and A camera module comprising three blades arranged point-symmetrically with respect to the first axis, wherein the blade layer above includes 18. In claim 17, the three blades are, A camera module in which a plurality of virtual lines connecting the first axis and each of the fixed axis holes of the three blades have an angle of 120°.

19. In Paragraph 17, The above blade portion includes a plurality of blade layers, each layer comprising a plurality of blades, and The above blade portion includes a first blade and a second blade that are disposed on different blade layers among the plurality of blade layers and are adjacent to each other. A camera module in which a virtual line connecting the first axis and the fixed axis hole of the first blade and a virtual line connecting the first axis and the fixed axis hole of the second blade have an angle of 35° to 45° when viewed in a plane (Top view).

Images