An iris device, a camera device and an optical apparatus

Abstract

The aperture device according to the present embodiment comprises a fixed part; a movable part disposed on the fixed part; a magnet and a coil for moving the movable part; and a plurality of blades forming a hole whose size changes according to the movement of the movable part, wherein the magnet comprises a first magnet disposed to face one side of the coil and a second magnet disposed to face the other side of the coil.

Description

Technology Field

[0001] The present embodiment relates to an aperture device, a camera device, and an optical device. Background Technology

[0002] Recently, smartphones are equipped with camera features capable of taking high-resolution photos and videos.

[0003] In particular, recent smartphone cameras are equipped with various features such as autofocus, image stabilization, and zoom, providing high satisfaction to many users.

[0004] However, conventional smartphone cameras have a problem where their performance is limited in dark environments. As a result, images taken under low-light conditions often have a lot of noise and reduced clarity, which is problematic. The problem to be solved

[0005] The present embodiment aims to provide a camera device that can be used without performance limitations even in dark environments. Additionally, it aims to provide an aperture device equipped in the aforementioned camera device. means of solving the problem

[0006] To solve the above technical problem, an aperture device according to an embodiment of the present invention comprises: a fixed part; a moving part disposed on the fixed part; a magnet and a coil for moving the moving part; and a plurality of blades forming a hole whose size changes according to the movement of the moving part, wherein the magnet comprises a first magnet disposed to face one side of the coil and a second magnet disposed to face the other side of the coil.

[0007] One side of the first magnet faces the coil, and a yoke may be disposed on the other side.

[0008] One side of the second magnet faces the coil, and a substrate may be placed on the other side.

[0009] The first magnet and the second magnet each include a divided region, and the polarity of the divided regions of the first magnet and the second magnet can be formed by alternating N and S poles.

[0010] The polarity of the region overlapping in the first axis direction among the divided regions in the first magnet and the second magnet may have different polarities.

[0011] The above coil may be arranged to overlap with two regions having different polarities in the first magnet and in the first axis direction.

[0012] The magnet above includes an opening at a position corresponding to the hole, and when current is applied to the coil, the magnet can rotate with the first axis as the axis of rotation.

[0013] To solve the above technical problem, an aperture device according to an embodiment of the present invention comprises: a fixed part; a moving part disposed on the fixed part; a magnet and a coil for moving the moving part; and a plurality of blades forming a hole whose size changes according to the movement of the moving part, wherein the magnet comprises a first magnet disposed to face one surface of the coil and a third magnet disposed to face the outer surface of the first magnet.

[0014] The third magnet has different polarities in the first axis direction, and the inner surface of the third magnet may be positioned to face the outer surface of the coil.

[0015] The inner surface of the third magnet may be concave, and the outer surface may be convex.

[0016] The first magnet includes a divided region, and the polarity of the divided region of the first magnet is formed by alternating N and S poles, and the third magnet may be arranged to face the N pole region and the S pole region of the first magnet.

[0017] A camera device according to the present embodiment may include a printed circuit board; an image sensor disposed on the printed circuit board; a lens disposed on the image sensor; and an aperture device disposed on the lens.

[0018] An optical device according to the present embodiment may include a main body; a camera device disposed on the main body; and a display disposed on the main body and outputting one or more of a video and an image captured by the camera device. Effects of the invention

[0019] Through this embodiment, driving performance can be secured while designing the aperture device to be ultra-thin.

[0020] In addition, the need for a yoke placed to minimize magnetic resistance decreases due to the increase in the magnetic force of the magnet, so the thickness of the yoke can be reduced.

[0021] In addition, the overall thickness of the aperture device can be reduced, allowing for additional gap between the magnet and the coil. This enables improvements in previously limited performance, such as assembly yield and the linearity of the Hall sensor. Brief explanation of the drawing

[0022] FIG. 1 is a perspective view of an aperture device according to the present embodiment. FIG. 2 is an exploded view of an aperture device according to the present embodiment. Figure 3 is a perspective view of Figure 1 with the cover omitted. Figure 4 is a top view of the aperture device in the state of Figure 3. Figure 5 is a perspective view of Figure 3 with the blade omitted. FIG. 6 is a perspective view of FIG. 5 with the moving part and magnet omitted. Figure 7 is a perspective view of Figure 6 with the substrate omitted. Figure 8 is a diagram illustrating the arrangement of magnets and coils. FIG. 9 illustrates a magnet and a coil according to the present embodiment. FIG. 10 illustrates a magnet, coil, yoke, and substrate according to the present embodiment. FIG. 11 is a drawing for explaining the arrangement of a magnet and a coil according to the present embodiment. FIG. 12 illustrates a magnet, a coil, and a yoke according to another embodiment of the present invention. FIG. 13 illustrates a magnet, a coil, and a yoke according to another embodiment of the present invention. Figure 14 shows the results of a torque simulation generated in a magnet and a coil according to an embodiment of the present invention. FIG. 15 illustrates a magnet and a coil according to another embodiment of the present invention. FIG. 16 shows the direction of the magnetic force generated in the embodiment of FIG. 15. FIG. 17 is an exploded view of a camera device according to the present embodiment. FIG. 18 is a perspective view of an optical device according to the present embodiment. Specific details for implementing the invention

[0023] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

[0024] However, the technical concept of the present invention is not limited to some of the described embodiments but can be implemented in various different forms, and within the scope of the technical concept of the present invention, one or more of the components among the embodiments may be selectively combined or substituted.

[0025] In addition, terms used in this embodiment (including technical and scientific terms) may be interpreted in a sense that is generally understood by those skilled in the art to which this embodiment belongs, unless explicitly and specifically defined otherwise. Terms that are commonly used, such as terms defined in advance, may be interpreted in consideration of their meaning in the context of the relevant technology.

[0026] Furthermore, the terms used in this embodiment are for the purpose of describing the embodiment and are not intended to limit the invention.

[0027] In this specification, the singular form may include the plural form unless specifically stated otherwise in the text, and when described as "at least one of A and B and C (or more than one)," it may include one or more of all combinations that can be formed from A, B, and C.

[0028] In addition, terms such as first, second, A, B, (a), (b), etc., may be used when describing the components of the present embodiment. These terms are used merely to distinguish the components from other components and are not intended to limit the essence, order, or sequence of the components.

[0029] And, where it is stated that a component is 'connected', 'combined', or 'connected' to another component, this may include not only cases where the component is directly 'connected', 'combined', or 'connected' to the other component, but also cases where it is 'connected', 'combined', or 'connected' due to another component located between the component and the other component.

[0030] Furthermore, when described as being formed or placed "above" or "below" each component, "above" or "below" includes not only cases where two components are in direct contact with each other, but also cases where one or more other components are formed or placed between the two components. Additionally, when expressed as "above" or "below," it may include the meaning of a downward direction as well as an upward direction relative to a single component.

[0031] As used below, the 'Optical Axis Direction' is defined as the optical axis direction of the lens and / or image sensor coupled to the lens driving device.

[0032] As used below, the 'vertical direction' may be a direction parallel to or the same as the optical axis. The vertical direction may correspond to the 'z-axis direction'. As used below, the 'horizontal direction' may be a direction perpendicular to the vertical direction. That is, the horizontal direction may be a direction perpendicular to the optical axis. Therefore, the horizontal direction may include the 'x-axis direction' and the 'y-axis direction'.

[0033] As used below, the 'Auto Focus (AF) function' is defined as a function that automatically focuses on a subject by adjusting the distance to the image sensor through the movement of the lens along the optical axis according to the distance to the subject, so that a sharp image of the subject can be obtained on the image sensor. Additionally, 'Closed-loop Auto Focus (CLAF) control' is defined as real-time feedback control of the lens position by detecting the distance between the image sensor and the lens to improve the accuracy of focus adjustment.

[0035] The configuration of the aperture device according to the present embodiment will be described below with reference to the drawings.

[0036] FIG. 1 is a perspective view of an aperture device according to the present embodiment. FIG. 2 is an exploded perspective view of an aperture device according to the present embodiment. FIG. 3 is a perspective view of FIG. 1 with the cover omitted. FIG. 4 is a top view of the aperture device in the state of FIG. 3. FIG. 5 is a perspective view of FIG. 3 with the blade omitted. FIG. 6 is a perspective view of FIG. 5 with the moving part and magnet omitted. FIG. 7 is a perspective view of FIG. 6 with the substrate omitted.

[0037] The aperture device (100) may be an aperture. The aperture device (100) may control the amount of light passing through the lens. The aperture device (100) may control the amount of light incident on the image sensor (60).

[0038] The aperture device (100) may be placed on the lens. The aperture device (100) may be placed on the lens. The aperture device (100) may be combined with the lens. The aperture device (100) may be fixed to the lens. The aperture device (100) may move integrally with the lens. The aperture device (100) may move together with the lens. The aperture device (100) may move along the optical axis direction together with the lens.

[0039] The aperture device (100) may include a fixed part (110). The fixed part (110) may be a stator. The fixed part (110) may be a part that is fixed relatively to the movable part (120). The fixed part (110) may movably support the movable part (120).

[0040] The aperture device (100) may include a base (111). The fixed part (110) may include a base (111). The base (111) may be referred to as a housing. The base (111) may be coupled with a cover (112). The base (111) may accommodate a movable part (120). The base (111) may movably support the movable part (120).

[0041] The aperture device (100) may include a cover (112). The fixed part (110) may include a cover (112). The cover (112) may be placed on a base (111). The cover (112) may be placed on the base (111). The cover (112) may accommodate a moving part (120) inside. The cover (112) may include a top plate and a side plate extending from the top plate.

[0042] The aperture device (100) may include a moving part (120). The moving part (120) may be a rotor. The moving part (120) may be a rotating body. The moving part (120) may be a movable part. The moving part (120) may be a mover. The moving part (120) may be a mover. The moving part (120) may be a carrier.

[0043] The moving part (120) may be placed on the fixed part (110). The moving part (120) may be placed on the fixed part (110). The moving part (120) may be movably placed on the fixed part (110). The moving part (120) may be rotatably placed on the fixed part (110). The moving part (120) may be placed on the base (111). The moving part (120) may be placed on the base (111). The moving part (120) may be movably placed on the base (111). The moving part (120) may be placed within the base (111). The moving part (120) may be placed within the cover (112). The moving part (120) may rotate within the base (111). The moving part (120) may rotate within the cover (112). The moving part (120) can move the blade (140). The moving part (120) can move together with the blade (140).

[0044] The moving part (120) may include a projection (121). The projection (121) may protrude upward from the body part of the moving part (120). The projection (121) may be formed on the upper surface of the body part of the moving part (120). The projection (121) may be coupled with a blade (140). Through this, when the moving part (120) moves, the blade (140) can also move together.

[0045] The aperture device (100) may include a driving unit (130). The driving unit (130) may move the moving unit (120). The driving unit (130) may move the blade (140). The driving unit (130) may move the moving unit (120) through electromagnetic interaction. The driving unit (130) may include a magnet (250) and a coil.

[0046] The aperture device (100) may include a magnet (131). The driving unit (130) may include a magnet (131). The magnet (131) may be placed on the moving unit (120). The magnet (131) may be placed on the moving unit (120). The magnet (131) may be ring-shaped. The magnet (131) may be shaped to include an opening. The magnet (131) may have N and S poles alternately arranged along the circumferential direction. The magnet (131) may be coupled to the moving unit (120). The magnet (131) may be fixed to the moving unit (120). The magnet (131) may be attached to the moving unit (120) with an adhesive.

[0047] The magnet (131) can move. The magnet (131) can move through interaction with the coil. The magnet (131) can move integrally with the moving part (120). The magnet (131) can move together with the moving part (120). The magnet (131) can be placed on the lower surface of the moving part (120).

[0048] The aperture device (100) may include a substrate (132). The substrate (132) may be placed on a base (111). The substrate (132) may be placed on the base (111). The substrate (132) may be placed between the base (111) and the moving part (120). A coil may be placed on the substrate (132). A coil may be formed on the substrate (132). For example, the coil may be formed as a pattern coil on the substrate (132).

[0049] The substrate (132) can be electrically connected to the substrate (270) of the lens driving device (200). Through this, the substrate (132) can receive power from the printed circuit board (50). Although not shown in the drawing, the substrate (132) of the aperture device (100) and the substrate (270) of the lens driving device (200) can be directly connected. Alternatively, a separate conductive member may be provided to connect the substrate (132) of the aperture device (100) and the substrate (270) of the lens driving device (200). As a variation, the substrate (132) of the aperture device (100) may be directly connected to the printed circuit board (50) without being connected to the substrate (270) of the lens driving device (200).

[0050] The aperture device (100) may include a coil. The driving unit (130) may include a coil. The coil may be placed on the fixed unit (110). The coil may be placed on the substrate (132). The coil may be coupled to the substrate (132). The coil may be soldered to the substrate (132). The coil may be electrically connected to the substrate (132). The coil may be integrally formed on the substrate (132). The coil may be formed as a patterned coil on the substrate (132). The coil may be placed on the base (111). The coil may be placed on the base (111). The coil may be placed inside the cover (112).

[0051] The coil can be positioned at a location corresponding to the magnet (131). The coil can overlap with the magnet (131). The coil can overlap with the magnet (131) in the direction of the optical axis. The coil can face the magnet (131). The coil can face the magnet (250). The coil can interact with the magnet (131). The coil can have an electromagnetic interaction with the magnet (131). When current is applied to the coil, the magnet (131) can move due to the interaction between the electromagnetic field of the coil and the electromagnetic field of the magnet (131). The coil can move the magnet (131). The coil can remain relatively fixed when the magnet (131) moves.

[0052] In a variation, the coil may be placed in the moving part (120) and the magnet (131) may be placed in the fixed part (110). The coil may move together with the moving part (120) and the magnet (131) may be fixed.

[0053] The aperture device (100) may include a sensor. The driving unit (130) may include a sensor. The sensor may be placed on a substrate (132). The sensor may be electrically connected to the substrate (132). The sensor may detect a magnet (131). The sensor may be a Hall sensor. The sensor may detect the magnetic force of the magnet (131). The sensor may be placed at a position corresponding to the magnet (131). The sensor may overlap with the magnet (131) in the direction of the optical axis. Control of the blade (140) may be fed back in real time through the position of the magnet (131) detected by the sensor. That is, the blade (140) may be controlled by real-time feedback by the sensor.

[0054] The aperture device (100) may include a blade (140). The blade (140) may be a light-blocking member. The blade (140) may be a light-blocking member. The blade (140) may be placed on a fixed part (110). The blade (140) may be placed on a base (111). The blade (140) may be placed inside a cover (112). The blade (140) may be placed on a moving part (120). The blade (140) may move together with the moving part (120). That is, when the moving part (120) moves, the blade (140) may also move together.

[0055] The blade (140) may include a first part coupled to the fixed part (110) and a second part coupled to the movable part (120). Through this, when the movable part (120) moves, the blade (140) can pivot relative to the fixed part (110). The blade (140) may include a first hole into which a projection of the fixed part (110) is inserted. The blade (140) may include a second hole into which a projection (121) of the movable part (120) is inserted. The blade (140) can rotate and move in a straight line at the part that meets the fixed part (110). The blade (140) can move in a straight line at the part that meets the movable part (120).

[0056] The aperture device (100) may include a hole (145). The blade (140) may include a hole (145) formed by a plurality of blades (140). The size or shape of the hole (145) may be changed by the plurality of blades (140). Light may pass through the hole (145).

[0057] The blade (140) may include a plurality of blades. The blade (140) may include nine blades. In this case, the nine blades (140) may be arranged in three layers of three blades each. The plurality of blades (140) may form a hole (145) whose size changes according to the movement of the moving part (120). The hole (145) may be formed by the inner surface (141) of the plurality of blades. The blade (140) may be provided in an odd number. The blade (140) may include six blades. The blade (140) may include twelve blades. The blade (140) may include six to twelve blades.

[0058] The blade (140) may include an inner surface (141). The inner surface (141) may form a hole (145) through which light passes. The blade (140) may include an inner surface (141) that forms the hole (145). The inner surface (141) may be an inner surface. The inner surface (141) may be an inner surface.

[0059] The inner surface (141) of the blade (140) may include a plurality of arc regions and interpolation regions formed between each of the plurality of arc regions. For example, the inner surface (141) of the blade (140) may include six arc regions and five interpolation regions. The five interpolation regions may be placed between the six arc regions.

[0061] In this embodiment, when current is applied to the coil of the aperture device (100), the blade (140) can move. That is, by applying current to the coil of the aperture device (100), the shape of the hole (145) formed by the blade (140) can be changed. In other words, by applying current to the coil, the F-number of the aperture device (100) can be changed.

[0062] The aperture device (100) may include a ball (150). The ball (150) may be positioned between the fixed part (110) and the moving part (120). The ball (150) may be positioned between the base (111) and the moving part (120). The ball (150) may be positioned on the base (111). The ball (150) may be in contact with the base (111). The ball (150) may move along the base (111). The ball (150) may move along the groove of the base (111). The ball (150) may be positioned on the moving part (120). The ball (150) may be in contact with the moving part (120). The ball (150) may move along the moving part (120). The ball (150) may move along the groove of the moving part (120). The ball (150) can be placed between the groove of the base (111) and the groove of the moving part (120). The groove of the base (111) and the groove of the moving part (120) may be rails.

[0063] The ball (150) can guide the movement of the moving part (120) in a circumferential direction. That is, the ball (150) can guide the moving part (120) to rotate around the optical axis. The ball (150) can restrict the movement of the moving part (120) to only rotation around the optical axis.

[0064] The ball (150) may include multiple balls. The ball (150) may include four balls.

[0065] The aperture device (100) may include a yoke (160). The yoke (160) may be placed on the fixed part (110). The yoke (160) may be placed on the base (111). The yoke (160) may be placed on the bottom plate of the base (111). The yoke (160) may be placed on the upper surface of the bottom plate of the base (111). The yoke (160) may be placed on the lower surface of the bottom plate of the base (111). The yoke (160) may be placed at a position corresponding to the magnet (131). The yoke (160) may overlap with the magnet (131) in the direction of the optical axis. An attractive force may act between the yoke (160) and the magnet (131). Through this, the ball (150) may be pressed between the moving part (120) and the fixed part (110). The ball (150) can be pressurized between the moving part (120) and the base (111) by the attractive force between the yoke (160) and the magnet (131).

[0067] FIG. 8 is a drawing for explaining the arrangement of a magnet and a coil, FIG. 9 illustrates a magnet and a coil according to the present embodiment, FIG. 10 illustrates a magnet, a coil, a yoke, and a substrate according to the present embodiment, FIG. 11 is a drawing for explaining the arrangement of a magnet and a coil according to the present embodiment, FIG. 12 illustrates a magnet, a coil, and a yoke according to another embodiment of the present invention, FIG. 13 illustrates a magnet, a coil, and a yoke according to another embodiment of the present invention, FIG. 14 shows the torque simulation results generated in a magnet and a coil according to an embodiment of the present invention, FIG. 15 illustrates a magnet and a coil according to another embodiment of the present invention, and FIG. 16 shows the direction of the magnetic force generated in the embodiment of FIG. 15.

[0068] Referring to FIG. 8, the magnet (131) may be ring-shaped. The magnet (131) may have a shape including an opening. The magnet (131) may be magnetized with multiple poles. For example, the magnet (131) may be magnetized with 8 poles vertically. The polarity of any one of the multiple divided regions of the magnet (131) may have a polarity different from that of both sides. The polarity of the divided regions of the magnet (131) may have alternating N and S poles. The magnet (131) may be formed with alternating N and S poles in 8 divided regions. The magnet (131) may be formed with alternating N and S poles in 6 divided regions. The magnet (131) may be formed with alternating N and S poles in 16 divided regions.

[0069] The magnet (131) may include one side containing an opening and the other side opposite the one side. The polarity of the magnet (131) may be referred to based on one side. For example, if one side of a divided region of the magnet (131) is the N pole, the other side may be the S pole. In this case, the divided region of the magnet (131) may be considered as the N pole. A coil (180) may be placed on one side of the magnet (131). A yoke (120) may be placed on the other side of the magnet (131).

[0070] The coil (180) may include a plurality of coils (180: 180A to 180D) spaced apart from each other. The coil (180) may be ring-shaped. The coil (180) may be shaped to include a hole. The coil (180) may be positioned to face areas having different poles among the divided regions of the magnet (131). The coil (180) may be positioned to overlap with areas having different poles among the divided regions of the magnet (131) in the first axis direction. The first axis direction may be the optical axis direction. When the magnet (131) is formed into 16 divided regions, four coils may be spaced apart and positioned on one surface of the magnet (131).

[0071] The yoke (120) may be positioned to face the region having a different pole among the divided regions of the magnet (131). The yoke (120) may be positioned to overlap the region having a different pole among the divided regions of the magnet (131) in the first axis direction. The magnet (131) may be positioned to overlap the coil (180) in the first axis direction. The yoke (120) may prevent magnetic flux leakage so that the magnetic force of the magnet (131) is concentrated on the coil (180).

[0072] The coil (180) may be placed on the substrate (132). The coil (180) may be connected to the substrate (132) to supply electricity. When current is applied to the coil (180), the magnet (131) may rotate through electromagnetic interaction with the magnet (131). When current is applied to the coil (180), the movement of the moving part (120) on which the magnet (131) is placed may be induced through electromagnetic interaction with the magnet (131).

[0074] Since the aperture device (100) is positioned inside the lens and can move along the optical axis direction together with the lens, it is necessary to design the internal structure to be ultra-thin. The magnet (131) and the coil are positioned overlappingly in the optical axis direction, and the main magnetic force of the magnet (131) must be formed in the optical axis direction. When the magnet (131) and the coil are designed to be ultra-thin, there is a problem that the torque for rotating the moving part (120) becomes insufficient.

[0075] Referring to FIG. 9, the magnet (131) according to the present embodiment may include a first magnet (131A) and a second magnet (131B) disposed on both sides of the coil (180). The first magnet (131A) and the second magnet (131B) may have the same shape. The first magnet (131A) and the second magnet (131B) may include the same number of divided regions. The polarity of the mutually facing surfaces of the first magnet (131A) and the second magnet (131B) may be different polarities. The boundary surface of the divided region of the first magnet (131A) may overlap with the boundary surface of the divided region of the second magnet (131B) in the first axis direction.

[0076] A coil (180) may be positioned between the first magnet (131A) and the second magnet (131B). The coil may include a plurality of coils (180A to 180D) spaced apart from each other. The plurality of coils may include first to fourth coils (180A to 180D). The maximum number of the plurality of coils may be half the number of divided regions of the magnet (131). In the initial position before the magnet (131) moves, the coil (180) may be positioned to face the S-pole region and the N-pole region among the divided regions of the first magnet (131A). In the initial position before the magnet (131) moves, the coil (180) may be positioned to face the boundary surface of the divided region of the first magnet (131A).

[0077] When current is applied to the coil (180), the first magnet (131A) and the second magnet (131B) can rotate at the same angle. Either one of the first magnet (131A) and the second magnet (131B) can be placed in the moving part (120) and the other can be placed in the fixed part (110). When current is applied to the coil (180), the magnet (131) placed in the moving part (120) can rotate, and the magnet (131) placed in the fixed part (110) can be fixed.

[0078] According to the present embodiment, magnets are placed on each side of the coil to enhance the performance of the magnet. Through this, maximum performance can be achieved under thickness-limited conditions in an ultra-thin design.

[0080] Referring to FIG. 10, one side of the first magnet (131A) may face the coil (180), and a yoke (21) may be disposed on the other side. One side of the second magnet (131B) may face the coil (180), and a substrate (132) may be disposed on the other side. The yoke (21: 21A~21D) may be disposed at a position that overlaps with the coil (180) in the first axis direction. The yoke (21) may be disposed to face the boundary surface of the divided area of ​​the first magnet (131A).

[0081] In another embodiment of the present invention illustrated in FIG. 12, the first magnet (131A) may be formed with an 8-pole magnet. Three coils may be spaced apart and arranged on one side of the first magnet (131A). One side of the three coils may face the first magnet (131A), and the other side may face the second magnet (131B). The three coils may be arranged at equal intervals. The three coils may be arranged at intervals of 120 degrees (360 / 3). A plurality of yokes (21) may be arranged on the other side of the first magnet (131A). Eight yokes may be arranged at equal intervals on the other side of the first magnet (131A). The eight yokes may be arranged to face the boundary surface of a plurality of divided regions of the first magnet (131A).

[0082] In another embodiment of the present invention illustrated in FIG. 13, the first magnet (131A) may be formed with an 8-pole magnetization. Five coils may be spaced apart and arranged on one side of the first magnet (131A). One side of the five coils may face the first magnet (131A), and the other side may face the second magnet (131B). The five coils may be arranged at equal intervals. The five coils may be arranged at intervals of 72 degrees (360 / 5). A plurality of yokes (21) may be arranged on the other side of the first magnet (131A). Eight yokes may be arranged at equal intervals on the other side of the first magnet (131A). The eight yokes may be arranged to face the boundary surface of a plurality of divided regions of the first magnet (131A).

[0084] FIG. 14(a) is a graph showing the torque generated according to the rotation angle in a structure in which one magnet is arranged as shown in FIG. 8, and FIG. 14(b) is a graph showing the torque generated according to the rotation angle in a structure in which two magnets are arranged as shown in FIG. 9. When rotating 10 degrees from the initial position, it can be seen that the torque generated by the electromagnetic interaction between the magnet and the coil is approximately 30.4 mN*mm in the conventional structure and approximately 31.2 mN*mm in the structure according to the present embodiment.

[0085] That is, in the structure according to the present embodiment, when the sum of the thicknesses in the first axis direction of two magnets is equal to the thickness in the first axis direction of a magnet of a conventional structure, it can be confirmed that the torque generated in the arrangement structure according to the present embodiment is large.

[0087] Coil 1[nN*m] Coil 2 [nN*m] Coil 3[nN*m] Coil 4[nN*m] Sum [nN*m] Torque[uN*m] 기존 구조 131.87 132.08 132.10 131.98 528.03 15.84 본 실시예 167.64 167.76 167.81 167.80 671.01 20.13

[0089] Referring to Table 1, when the current applied to the coil is 40mA and the number of coil turns is 30 turns, when magnets with a thickness half that of the conventional magnet are placed on both sides of the coil, the torque generated can be about 1.27 times greater than that of the conventional shape.

[0091] Referring to FIG. 15, the magnet (131) may include a third magnet (131C) positioned facing the outer surface of the first magnet (131A). The third magnet (131C) may be positioned to face the outer surface of the coil (180). The third magnet (131C) may be positioned to overlap the first magnet (131A) in a second direction perpendicular to the first axis. The third magnet (131C) may be positioned to overlap the coil (180) in a second direction.

[0092] The third magnet (131C) may be formed as a curved surface having a curvature corresponding to the outer surface of the first magnet (131A). The inner surface of the third magnet (131C) facing the first magnet (131A) may have a concave shape, and the outer surface may have a convex shape. The third magnet (131C) may be formed in a block shape. The surface of the third magnet (131C) facing the first magnet (131A) may be flat. The third magnet (131C) may be formed as a magnetization structure divided into two based on the first axis direction. For example, the upper region of the third magnet (131C) may be the N pole, and the lower region of the third magnet (131C) may be the S pole.

[0093] The length of the third magnet (131C) in the second axis direction can be formed according to the rotational angle of the first magnet (131A). For example, the larger the rotational angle of the first magnet (131A) is designed to be, the larger the length of the third magnet (131C) in the second axis direction can be formed. The length of the third magnet (131C) in the second axis direction can be formed to correspond to the length of the outer surface of the coil (180).

[0095] Angle[deg] Torque 1[nN*m] Torque 2[nN*m] Torque 3[nN*m] Torque 4[nN*m] -8 61.51 61.57 61.63 61.61 -4 55.49 55.40 55.44 55.45 0 53.64 53.63 53.61 53.68 4 55.49 55.55 55.48 55.48 8 61.53 61.49 61.48 61.54

[0097] Angle[deg] Torque 1[nN*m] Torque 2[nN*m] Torque 3[nN*m] Torque 4[nN*m] -8 74.66 74.25 74.20 74.30 -4 67.58 67.23 67.06 67.09 0 65.47 64.92 64.99 65.01 4 67.49 66.96 66.94 66.97 8 74.50 74.19 74.26 74.27

[0099] Table 2 shows the simulation results in a structure in which one magnet is placed as shown in FIG. 8, and Table 3 shows the simulation results in a structure in which a third magnet is additionally placed on the outer surface of the first magnet as shown in FIG. 15. These represent the torque generated according to the rotation angle when the same current is applied to coils of the same number of turns while the thickness in the first axis direction of the magnet shown in FIG. 8 and the first magnet shown in FIG. 15 are the same. Torque 1 is the torque generated in the first coil (180A), Torque 2 is the torque generated in the second coil (180B), Torque 3 is the torque generated in the third coil (180C), and Torque 4 is the torque generated in the fourth coil (180D). Referring to Tables 2 and 3, it can be seen that the torque increases by an average of about 21% for each rotation angle.

[0100] Referring to FIG. 16, the magnetic force generated by the third magnet (131C) is formed in the direction of the arrow, which coincides with the rotational direction of the first magnet (131A). Therefore, as the third magnet (131C) is positioned on the outer surface of the first magnet (131A), there is an effect of making the torque stronger in the direction in which the first magnet (131A) rotates.

[0102] FIG. 17 is an exploded view of a camera device according to the present embodiment.

[0103] The camera device (10) may include a lens module (20). The lens module (20) may include at least one lens. The lens may be positioned at a location corresponding to the image sensor (60). The lens module (20) may include a lens and a barrel. The lens module (20) may be coupled to a holder (230) of a lens drive device (200). The lens module (20) may be coupled to the holder (230) by screw coupling and / or adhesive. The lens module (20) may move integrally with the holder (230).

[0104] The camera device (10) may include a filter (30). The filter (30) may serve to block light of a specific frequency band from passing through the lens module (20) from entering the image sensor (60). The filter (30) may be positioned parallel to the xy plane. The filter (30) may be positioned between the lens module (20) and the image sensor (60). The filter (30) may be positioned on the sensor base (40). As a variation, the filter (30) may be positioned on the base (210) of the lens driving device (200). The filter (30) may include an infrared filter. The infrared filter may block light in the infrared region from entering the image sensor (60).

[0105] The camera device (10) may include a sensor base (40). The sensor base (40) may be positioned between the lens driving device (200) and the printed circuit board (50). The sensor base (40) may include a protrusion (41) on which a filter (30) is positioned. An opening may be formed in the portion of the sensor base (40) on which the filter (30) is positioned so that light passing through the filter (30) can be incident on the image sensor (60). An adhesive member may bond or bond the base (111) of the lens driving device (200) to the sensor base (40). The adhesive member may additionally serve to prevent foreign substances from entering the interior of the lens driving device (200). The adhesive member may include one or more of epoxy, thermosetting adhesive, and UV-curing adhesive.

[0106] The camera device (10) may include a printed circuit board (PCB) (50). The printed circuit board (50) may be a board or a circuit board. A lens driving device (200) may be disposed on the printed circuit board (50). A sensor base (40) may be disposed between the printed circuit board (50) and the lens driving device (200). The printed circuit board (50) may be electrically connected to the lens driving device (200). An image sensor (60) may be disposed on the printed circuit board (50). The printed circuit board (50) may be equipped with various circuits, components, control units, etc., to convert an image formed on the image sensor (60) into an electrical signal and transmit it to an external device.

[0107] The camera device (10) may include an image sensor (60). The image sensor (60) may be configured such that an image is formed when light passing through a lens and a filter (30) is incident. The image sensor (60) may be mounted on a printed circuit board (50). The image sensor (60) may be electrically connected to the printed circuit board (50). For example, the image sensor (60) may be coupled to the printed circuit board (50) by Surface Mounting Technology (SMT). As another example, the image sensor (60) may be coupled to the printed circuit board (50) by flip chip technology. The image sensor (60) may be positioned so that its optical axis aligns with that of the lens. That is, the optical axis of the image sensor (60) and the optical axis of the lens may be aligned. The image sensor (60) can convert light irradiated onto an effective image area of ​​the image sensor (60) into an electrical signal. The image sensor (60) may be any one of a CCD (charge coupled device), a MOS (metal oxide semiconductor), a CPD, and a CID.

[0108] The camera device (10) may include a motion sensor (70). The motion sensor (70) may be mounted on a printed circuit board (50). The motion sensor (70) may be electrically connected to a control unit (80) through a circuit pattern provided on the printed circuit board (50). The motion sensor (70) may output rotational angular velocity information resulting from the movement of the camera device (10). The motion sensor (70) may include a 2-axis or 3-axis gyro sensor or an angular velocity sensor.

[0109] The camera device (10) may include a control unit (80). The control unit (80) may be placed on a printed circuit board (50). The control unit (80) may be electrically connected to a coil (330) of a lens driving device (200). The control unit (80) may individually control the direction, strength, and amplitude of the current supplied to the coil (330). The control unit (80) may control the lens driving device (200) to perform an autofocus function and / or a hand image correction function. Furthermore, the control unit (80) may perform autofocus feedback control and / or hand image correction feedback control for the lens driving device (200).

[0110] The camera device (10) may include a connector (90). The connector (90) may be electrically connected to a printed circuit board (50). The connector (90) may include a port for electrically connecting to an external device.

[0112] The configuration of the optical device according to the present embodiment will be described below with reference to the drawings.

[0113] FIG. 18 is a perspective view of an optical device according to the present embodiment.

[0114] The optical device (1) may include one or more of a mobile phone, mobile phone, portable terminal, mobile terminal, smartphone, smart pad, portable smart device, digital camera, laptop computer, digital broadcasting terminal, PDA (Personal Digital Assistants), PMP (Portable Multimedia Player), and navigation. The optical device (1) may include any device for capturing images or photographs.

[0115] The optical device (1) may include a main body (2). The optical device (1) may include a camera device (10). The camera device (10) may be placed on the main body (2). The camera device (10) may photograph a subject. The optical device (1) may include a display. The display may be placed on the main body (2). The display may output one or more of the video and images captured by the camera device (10). The display may be placed on a first surface of the main body (2). The camera device (10) may be placed on one or more of the first surface of the main body (2) and a second surface opposite the first surface. The camera device (10) may have a triple camera positioned vertically. Alternatively, the camera device (10) may have a triple camera positioned horizontally.

[0116] Those skilled in the art related to the embodiments described above will understand that they may be implemented in modified forms without departing from the essential characteristics of the description. Therefore, the disclosed methods should be considered in an illustrative rather than a restrictive sense. The scope of the invention is defined by the claims, not by the foregoing description, and all variations within the scope of equivalence should be interpreted as being included in the invention.

Claims

Claim 1 An aperture device comprising: a fixed part; a moving part disposed on the fixed part; a magnet and a coil for moving the moving part; and a plurality of blades forming a hole whose size changes according to the movement of the moving part, wherein the plurality of blades comprises nine blades, and the nine blades are each arranged in three layers of three blades, the outer surface of the magnet comprises a flat shape, the magnet comprises an opening at a position corresponding to the hole, and the inner surface of the magnet comprises a curved shape. Claim 2 An aperture device according to claim 1, wherein the magnet comprises a first magnet and a second magnet, and the first magnet and the second magnet each comprise a divided region, and the polarity of the divided regions of the first magnet and the second magnet is formed by alternating N and S poles. Claim 3 In paragraph 2, the polarity of the region overlapping in the first axis direction among the divided regions in the first magnet and the second magnet is an aperture device having different polarities. Claim 4 In claim 1, when current is applied to the coil, the magnet is an aperture device that rotates with the first axis as the axis of rotation. Claim 5 The aperture device according to claim 1, wherein the magnet comprises a first magnet positioned to face one side of the coil and a second magnet positioned to face the other side of the coil. Claim 6 In paragraph 5, an aperture device in which one side of the first magnet faces the coil and a yoke is disposed on the other side. Claim 7 In paragraph 5, an aperture device in which one side of the second magnet faces the coil and a substrate is disposed on the other side. Claim 8 In claim 5, the aperture device comprises a third magnet positioned to face the outer surface of the first magnet. Claim 9 In claim 8, the aperture device wherein the third magnet has different polarities in the first axis direction, and the inner surface of the third magnet is positioned to face the outer surface of the coil. Claim 10 In claim 8, the aperture device wherein the inner surface of the third magnet is concave and the outer surface is convex. Claim 11 delete Claim 12 delete Claim 13 delete

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