Aperture device, camera device, and optical device

Abstract

An aperture device according to an embodiment of the present invention comprises: a fixed unit; a mobile unit disposed on the fixed unit; a magnet and a coil which move the mobile unit; and a plurality of blades which form holes that change in size according to the movement of the mobile unit, wherein the magnet includes a first magnet disposed to face one surface of the coil and a second magnet disposed to face the other surface of the coil.

Description

Aperture devices, camera devices and optical instruments

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

[0002] Modern smartphones are equipped with cameras capable of taking high-resolution photos and videos.

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

[0004] However, conventional smartphone cameras suffer from performance limitations in low-light environments. This causes images captured in low-light conditions to be noisy and lack clarity, posing a problem.

[0005] The present embodiment aims to provide a camera device that can be used without performance limitations even in dark environments. Furthermore, the present invention aims to provide an aperture device for the aforementioned camera device.

[0006] In order to solve the above technical problem, an aperture device according to an embodiment of the present invention includes a fixed part; a moving part arranged on the fixed part; a magnet and a coil that move the moving part; and a plurality of blades that form a hole whose size changes according to the movement of the moving part, and the magnets include a first magnet arranged to face one surface of the coil and a second magnet arranged to face the other surface of the coil.

[0007] One side of the above first magnet faces the coil, and a yoke can be placed on the other side.

[0008] One side of the second magnet faces the coil, and a substrate can 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 region of the first magnet and the second magnet can be formed by alternating the N pole and the S pole.

[0010] The polarities of the overlapping regions 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 can be arranged to overlap two regions having different polarities in the first magnet in the first axial direction.

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

[0013] In order to solve the above technical problem, an aperture device according to an embodiment of the present invention includes a fixed part; a moving part arranged on the fixed part; a magnet and a coil that move the moving part; and a plurality of blades that form a hole whose size changes according to the movement of the moving part, and the magnets include a first magnet arranged to face one surface of the coil and a third magnet arranged to face an outer surface of the first magnet.

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

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

[0016] The first magnet may include a divided region, and the polarity of the divided region of the first magnet may be formed by alternating N and S poles, and the third magnet may be arranged to face the N and S pole regions 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 the aperture device disposed on the lens.

[0018] An optical device according to the present embodiment may include a main body; the camera device disposed in the main body; and a display disposed in the main body and outputting at least one of an image and a video captured by the camera device.

[0019] Through this embodiment, it is possible to secure driving performance while designing an ultra-thin aperture device.

[0020] In addition, the yoke positioned to minimize magnetic resistance becomes less necessary due to the increase in magnetic force of the magnet, so the thickness of the yoke can be reduced.

[0021] Additionally, the overall thickness of the aperture device can be reduced, allowing for additional gap between the magnet and coil. This can improve previously limited performance, such as assembly yield and Hall sensor linearity.

[0022] Fig. 1 is a perspective view of an aperture device according to the present embodiment.

[0023] Fig. 2 is an exploded perspective view of an aperture device according to the present embodiment.

[0024] Figure 3 is a perspective view of Figure 1 with the cover omitted.

[0025] Fig. 4 is a plan view from above of the aperture device in the state of Fig. 3.

[0026] Figure 5 is a perspective view of Figure 3 with the blade omitted.

[0027] Figure 6 is a perspective view of Figure 5 with the moving part and magnet omitted.

[0028] Figure 7 is a perspective view of Figure 6 with the substrate omitted.

[0029] Figure 8 is a drawing for explaining the arrangement of magnets and coils.

[0030] Figure 9 illustrates a magnet and coil according to the present embodiment.

[0031] Figure 10 illustrates a magnet, coil, yoke, and substrate according to the present embodiment.

[0032] Fig. 11 is a drawing for explaining the arrangement of magnets and coils according to the present embodiment.

[0033] FIG. 12 illustrates a magnet, coil, and yoke according to another embodiment of the present invention.

[0034] FIG. 13 illustrates a magnet, coil, and yoke according to another embodiment of the present invention.

[0035] Figure 14 shows the results of a torque simulation generated from a magnet and coil according to an embodiment of the present invention.

[0036] FIG. 15 illustrates a magnet and coil according to another embodiment of the present invention.

[0037] Figure 16 shows the direction of the magnetic force generated in the embodiment of Figure 15.

[0038] Fig. 17 is an exploded perspective view of a camera device according to the present embodiment.

[0039] Fig. 18 is a perspective view of an optical device according to the present embodiment.

[0040] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0041] However, the technical idea of ​​the present invention is not limited to some of the embodiments described, but can be implemented in various different forms, and within the scope of the technical idea of ​​the present invention, one or more of the components between the embodiments can be selectively combined or substituted for use.

[0042] In addition, terms (including technical and scientific terms) used in this embodiment may be interpreted as having a meaning that can be generally understood by a person of ordinary skill in the technical field to which this embodiment belongs, unless explicitly and specifically defined and described, and terms that are commonly used, such as terms defined in a dictionary, may be interpreted in consideration of the contextual meaning of the relevant technology.

[0043] Additionally, the terms used in this embodiment are for the purpose of describing the embodiments and are not intended to limit the present invention.

[0044] In this specification, the singular may also include the plural unless specifically stated otherwise in the phrase, and when it is described as “A and / or at least one (or more) of B, C”, it may include one or more of all combinations that can be combined with A, B, C.

[0045] Additionally, in describing the components of this embodiment, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only intended to distinguish the components from other components, and are not intended to limit the nature, order, or sequence of the components.

[0046] And, when a component is described as being 'connected', 'coupled', or 'connected' to another component, it may include not only cases where the component is 'connected', 'coupled', or 'connected' directly to the other component, but also cases where the component is 'connected', 'coupled', or 'connected' by another component between the component and the other component.

[0047] Additionally, when described as being formed or arranged "above" or "below" each component, "above" or "below" includes not only cases where the two components are in direct contact with each other, but also cases where one or more other components are formed or arranged between the two components. Furthermore, when expressed as "above" or "below," the meaning may include not only the upward direction but also the downward direction based on one component.

[0048] The 'optical axis direction' used below is defined as the optical axis direction of the lens and / or image sensor coupled to the lens driving device.

[0049] The 'vertical direction' used below may be a direction parallel to or the same direction as the optical axis direction. The vertical direction may correspond to the 'z-axis direction'. The 'horizontal direction' used below 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'.

[0050] The 'auto focus (AF) function' used below is defined as a function that automatically focuses on a subject by adjusting the distance from the image sensor by moving the lens in the optical axis direction according to the distance of the subject so that a clear image of the subject can be obtained on the image sensor. In addition, 'closed-loop auto focus (CLAF) control' is defined as a function that detects the distance between the image sensor and the lens and provides feedback control of the position of the lens in real time to improve the accuracy of focus adjustment.

[0051]

[0052] Below, the configuration of the aperture device according to the present embodiment is described with reference to the drawings.

[0053] 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 plan view of the aperture device of Fig. 3 as viewed from above. 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.

[0054] The aperture device (100) may be an aperture. The aperture device (100) can control the amount of light passing through the lens. The aperture device (100) can control the amount of light incident on the image sensor (60).

[0055] The aperture device (100) can be placed on the lens. The aperture device (100) can be placed on the lens. The aperture device (100) can be combined with the lens. The aperture device (100) can be fixed to the lens. The aperture device (100) can move integrally with the lens. The aperture device (100) can move together with the lens. The aperture device (100) can move in the optical axis direction together with the lens.

[0056] The aperture device (100) may include a fixed member (110). The fixed member (110) may be a stator. The fixed member (110) may be a part that is relatively fixed with respect to the moving member (120). The fixed member (110) may movably support the moving member (120).

[0057] The aperture device (100) may include a base (111). The fixed part (110) may include the base (111). The base (111) may be referred to as a housing. The base (111) may be coupled to a cover (112). The base (111) may accommodate a moving part (120). The base (111) may movably support the moving part (120).

[0058] The aperture device (100) may include a cover (112). The fixed part (110) may include the cover (112). The cover (112) may be placed on the base (111). The cover (112) may be placed on the base (111). The cover (112) may accommodate the moving part (120) therein. The cover (112) may include an upper plate and a side plate extending from the upper plate.

[0059] 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.

[0060] The moving part (120) can be placed on the fixed part (110). The moving part (120) can be placed on the fixed part (110). The moving part (120) can be movably placed on the fixed part (110). The moving part (120) can be rotatably placed on the fixed part (110). The moving part (120) can be placed on the base (111). The moving part (120) can be placed on the base (111). The moving part (120) can be movably placed on the base (111). The moving part (120) can be placed inside the base (111). The moving part (120) can be placed inside the cover (112). The moving part (120) can rotate inside the base (111). The moving part (120) can rotate inside the cover (112). The moving part (120) can move the blade (140). The moving part (120) can move together with the blade (140).

[0061] The moving part (120) may include a protrusion (121). The protrusion (121) may protrude upward from the body of the moving part (120). The protrusion (121) may be formed on the upper surface of the body of the moving part (120). The protrusion (121) may be coupled with the blade (140). Through this, when the moving part (120) moves, the blade (140) may also move together.

[0062] 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.

[0063] The aperture device (100) may include a magnet (131). The driving unit (130) may include a magnet (131). The magnet (131) may be disposed on the moving unit (120). The magnet (131) may be disposed on the moving unit (120). The magnet (131) may have a ring shape. The magnet (131) may have a shape including an opening. The magnet (131) may have N and S poles alternately disposed along a 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 bonded to the moving unit (120) with an adhesive.

[0064] The magnet (131) is movable. 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).

[0065] The aperture device (100) may include a substrate (132). The substrate (132) may be disposed on the base (111). The substrate (132) may be disposed on the base (111). The substrate (132) may be disposed between the base (111) and the moving part (120). A coil may be disposed on the substrate (132). The coil may be formed on the substrate (132). For example, the coil may be formed as a pattern coil on the substrate (132).

[0066] The substrate (132) may be electrically connected to the substrate (270) of the lens driving device (200). Through this, the substrate (132) may 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) may be directly connected. Alternatively, a separate conductive member may be provided that connects the substrate (132) of the aperture device (100) and the substrate (270) of the lens driving device (200). Alternatively, 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).

[0067] The aperture device (100) may include a coil. The driving unit (130) may include a coil. The coil may be disposed on the fixing unit (110). The coil may be disposed 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 formed integrally with the substrate (132). The coil may be formed as a pattern coil on the substrate (132). The coil may be disposed on the base (111). The coil may be disposed on the base (111). The coil may be disposed within the cover (112).

[0068] The coil can be positioned corresponding to the magnet (131). The coil can overlap with the magnet (131). The coil can overlap with the magnet (131) in the optical axis direction. 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 electromagnetically interact 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.

[0069] Alternatively, the coil may be placed on the moving part (120) and the magnet (131) may be placed on the fixed part (110). The coil may move together with the moving part (120) and the magnet (131) may be fixed.

[0070] The aperture device (100) may include a sensor. The driving unit (130) may include a sensor. The sensor may be disposed on the 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 disposed at a position corresponding to the magnet (131). The sensor may overlap the magnet (131) in the optical axis direction. 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 feedback-controlled in real time by the sensor.

[0071] The aperture device (100) may include a blade (140). The blade (140) may be a member that blocks light. The blade (140) may be a light-blocking member. The blade (140) may be placed on a fixed member (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 member (120). The blade (140) may move together with the moving member (120). That is, when the moving member (120) moves, the blade (140) may also move together.

[0072] The blade (140) may include a first part coupled with the fixed part (110) and a second part coupled with the moving part (120). Through this, when the moving part (120) moves, the blade (140) can pivotally move with respect to the fixed part (110). The blade (140) may include a first hole into which a protrusion of the fixed part (110) is inserted. The blade (140) may include a second hole into which a protrusion (121) of the moving part (120) is inserted. The blade (140) can rotate and move linearly at a portion where it meets the fixed part (110). The blade (140) can move linearly at a portion where it meets the moving part (120).

[0073] 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 hole (145) may be changed in size or shape by the plurality of blades (140). Light may pass through the hole (145).

[0074] 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 peripheral 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.

[0075] 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.

[0076] The inner surface (141) of the blade (140) may include a plurality of circular arc regions and interpolation regions formed between the plurality of circular arc regions. For example, the inner surface (141) of the blade (140) may include six circular arc regions and five interpolation regions. The five interpolation regions may be arranged between the six circular arc regions.

[0077]

[0078] 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.

[0079] The aperture device (100) may include a ball (150). The ball (150) may be disposed between the fixed part (110) and the moving part (120). The ball (150) may be disposed between the base (111) and the moving part (120). The ball (150) may be disposed 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 a groove of the base (111). The ball (150) may be disposed 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 a 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) can be rails.

[0080] The ball (150) can guide the movement of the moving part (120) in the circumferential direction. That is, the ball (150) can guide the moving part (120) to rotate around the optical axis. The ball (150) can limit the movement of the moving part (120) to only rotation around the optical axis.

[0081] The ball (150) may include multiple balls. The ball (150) may include four balls.

[0082] The aperture device (100) may include a yoke (160). The yoke (160) may be disposed on the fixed portion (110). The yoke (160) may be disposed on the base (111). The yoke (160) may be disposed on the lower plate of the base (111). The yoke (160) may be disposed on the upper surface of the lower plate of the base (111). The yoke (160) may be disposed on the lower surface of the lower plate of the base (111). The yoke (160) may be disposed at a position corresponding to the magnet (131). The yoke (160) may overlap the magnet (131) in the optical axis direction. An attractive force may be applied between the yoke (160) and the magnet (131). Through this, the ball (150) may be pressed between the moving portion (120) and the fixed portion (110). The ball (150) can be pressed between the moving part (120) and the base (111) by the attractive force between the yoke (160) and the magnet (131).

[0083]

[0084] 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 illustrates a torque simulation result 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 illustrates the direction of a magnetic force generated in the embodiment of FIG. 15.

[0085] 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 eight poles in the vertical direction. The polarity of one of the multiple divided regions of the magnet (131) may have a polarity different from the polarity of both sides. The polarity of the divided regions of the magnet (131) may have a polarity in which the N pole and the S pole alternate. The magnet (131) may be formed by alternating the N pole and the S pole in eight divided regions. The magnet (131) may be formed by alternating the N pole and the S pole in six divided regions. The magnet (131) may be formed by alternating the N pole and the S pole in 16 divided regions.

[0086] The magnet (131) may include one side including an opening and another side opposite the first side. The polarity of the magnet (131) may be referred to based on the one side. For example, if one side of one area among the divided regions of the magnet (131) is an N pole, the other side may be an S pole. In this case, the divided region of the magnet (131) may be viewed as an N pole. A coil (180) may be arranged on one side of the magnet (131). A yoke (120) may be arranged on the other side of the magnet (131).

[0087] The coil (180) may include a plurality of coils (180: 180A to 180D) that are spaced apart from each other. The coil (180) may have a ring shape. The coil (180) may have a shape that includes a hole. The coil (180) may be placed to face regions having different poles among the divided regions of the magnet (131). The coil (180) may be placed to overlap regions having different poles among the divided regions of the magnet (131) in a 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 from each other and placed on one surface of the magnet (131).

[0088] The yoke (120) may be arranged to face regions having different poles among the divided regions of the magnet (131). The yoke (120) may be arranged to overlap regions having different poles among the divided regions of the magnet (131) in the first axial direction. The magnet (131) may be arranged to overlap the coil (180) in the first axial direction. The yoke (120) may prevent magnetic flux leakage so that the magnetic force of the magnet (131) is concentrated on the coil (180).

[0089] A coil (180) may be placed on a substrate (132). The coil (180) may be connected to the substrate (132) and may be supplied with 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).

[0090]

[0091] Since the aperture device (100) is positioned inside the lens and can move along the optical axis with the lens, it is necessary to design an ultra-thin internal structure. The magnet (131) and the coil are positioned to overlap in the optical axis direction, and the main magnetic force of the magnet (131) must be formed in the optical axis direction. If 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) is insufficient.

[0092] Referring to FIG. 9, the magnet (131) according to the present embodiment may include a first magnet (131A) and a second magnet (131B) arranged 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 polarities of the 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.

[0093] The coil (180) may be arranged between the first magnet (131A) and the second magnet (131B). The coil may include a plurality of coils (180A to 180D) that are 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). At the initial position before the magnet (131) moves, the coil (180) may be arranged to face the S pole region and the N pole region among the divided regions of the first magnet (131A). At the initial position before the magnet (131) moves, the coil (180) may be arranged to face the boundary surface of the divided regions of the first magnet (131A).

[0094] When current is applied to the coil (180), the first magnet (131A) and the second magnet (131B) can rotate at the same angle. Either the first magnet (131A) or the second magnet (131B) can be placed on the moving part (120) and the other can be placed on the fixed part (110). When current is applied to the coil (180), the magnet (131) placed on the moving part (120) can rotate and the magnet (131) placed on the fixed part (110) can be fixed.

[0095] According to this embodiment, magnet performance can be enhanced by placing magnets on each side of the coil. This allows for maximum performance within limited thickness conditions in an ultra-thin design.

[0096]

[0097] Referring to Fig. 10, one side of the first magnet (131A) may face the coil (180), and a yoke (21) may be arranged on the other side. One side of the second magnet (131B) may face the coil (180), and a substrate (132) may be arranged on the other side. The yokes (21: 21A to 21D) may be arranged at positions overlapping the coil (180) in the first axis direction. The yoke (21) may be arranged to face the boundary surface of the divided area of ​​the first magnet (131A).

[0098] In another embodiment of the present invention illustrated in FIG. 12, the first magnet (131A) may be formed as an eight-pole magnet. Three coils may be spaced apart and arranged on one surface of the first magnet (131A). One surface of the three coils may face the first magnet (131A), and the other surface may face the second magnet (131B). The three coils may be arranged at equal intervals. The three coils may be arranged at 120-degree (360 / 3) intervals. A plurality of yokes (21) may be arranged on the other surface of the first magnet (131A). Eight yokes may be arranged at equal intervals on the other surface of the first magnet (131A). The eight yokes may be arranged to face boundaries of a plurality of divided regions of the first magnet (131A).

[0099] In another embodiment of the present invention illustrated in FIG. 13, the first magnet (131A) may be formed as an eight-pole magnet. Five coils may be spaced apart and arranged on one surface of the first magnet (131A). One surface of the five coils may face the first magnet (131A), and the other surface may face the second magnet (131B). The five coils may be arranged at equal intervals. The five coils may be arranged at 72-degree (360 / 5) intervals. A plurality of yokes (21) may be arranged on the other surface of the first magnet (131A). Eight yokes may be arranged at equal intervals on the other surface of the first magnet (131A). The eight yokes may be arranged to face boundaries of a plurality of divided regions of the first magnet (131A).

[0100]

[0101] Fig. 14(a) is a graph showing the torque generated according to the rotation angle in the 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 the structure in which two magnets are arranged as shown in Fig. 9. When rotating 10 degrees from the initial position, it can be confirmed that the torque generated by the electromagnetic interaction between the magnet and the coil is approximately 30.4 mN*mm in the existing structure and approximately 31.2 mN*mm in the structure according to the present embodiment.

[0102] That is, in the structure according to the present embodiment, when the sum of the thicknesses of the two magnets in the first axis direction is the same as the thickness of the magnets in the first axis direction of the existing structure, it can be confirmed that the torque generated in the arrangement structure according to the present embodiment is large.

[0103]

[0104] Coil 1[nN*m]Coil 2[nN*m]Coil 3[nN*m]Coil 4[nN*m]Sum[nN*m]Torque[uN*m]Existing structure131.87132.08132.10131.98528.0315.84This example167.64167.76167.81167.80671.0120.13

[0105] Referring to Table 1, when the current applied to the coil is 40 mA and the number of coil turns is 30, when magnets with a thickness half that of the existing magnet are placed on both sides of the coil, the torque generated can be about 1.27 times greater than that of the existing shape.

[0106] 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 facing 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 the second direction.

[0107] 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 a plane. The third magnet (131C) may be formed as a magnetizing structure divided into two based on the first axis direction. For example, the upper region of the third magnet (131C) may be a north pole, and the lower region of the third magnet (131C) may be a south pole.

[0108] The length of the third magnet (131C) in the second axis direction can be formed according to the rotation angle of the first magnet (131A). For example, as the rotation angle of the first magnet (131A) is designed to be large, the length of the third magnet (131C) in the second axis direction can be formed to be large. 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).

[0109]

[0110] Angle[deg]Torque 1[nN*m]Torque 2[nN*m]Torque 3[nN*m]Torque 4[nN*m]-861.5161.5761.6361.61-455.4955.4055.4455.45053.6453.6353.6153.68455.4955.5555.4855.48861.5361.4961.4861.54

[0111] Angle[deg]Torque 1[nN*m]Torque 2[nN*m]Torque 3[nN*m]Torque 4[nN*m]-874.6674.2574.2074.30-467.5867.2367.0667.09065.4764.9264.9965.01467.4966.9666.9466.97874.5074.1974.2674.27

[0112] Table 2 shows the simulation results in a structure in which one magnet is arranged as shown in FIG. 8, and Table 3 shows the simulation results in a structure in which a third magnet is additionally arranged on the outer surface of the first magnet as shown in FIG. 15. When the thicknesses of the magnets as shown in FIG. 8 and the first magnet as shown in FIG. 15 in the first axis direction are the same and the same current is applied to coils having the same number of turns, the torque generated according to the rotation angle is shown. 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 confirmed that the torque increases by an average of about 21% for each rotation angle.

[0113] Referring to Fig. 16, the magnetic force by the third magnet (131C) is formed in the direction of the arrow, which is consistent with the rotational direction of the first magnet (131A). Therefore, as the third magnet (131C) is placed on the outer surface of the first magnet (131A), there is an effect of the torque becoming stronger in the direction in which the first magnet (131A) rotates.

[0114]

[0115] Fig. 17 is an exploded perspective view of a camera device according to the present embodiment.

[0116] 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 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 driving device (200). The lens module (20) may be coupled to the holder (230) by screw coupling and / or adhesive. The lens module (20) may be moved integrally with the holder (230).

[0117] The camera device (10) may include a filter (30). The filter (30) may block light of a specific frequency band from passing through the lens module (20) from being incident on the image sensor (60). The filter (30) may be arranged parallel to the xy plane. The filter (30) may be arranged between the lens module (20) and the image sensor (60). The filter (30) may be arranged on the sensor base (40). Alternatively, the filter (30) may be arranged 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 being incident on the image sensor (60).

[0118] The camera device (10) may include a sensor base (40). The sensor base (40) may be disposed 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 disposed. An opening may be formed in a portion of the sensor base (40) on which the filter (30) is disposed so that light passing through the filter (30) may be incident on the image sensor (60). The adhesive member may couple or adhere 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 at least one of epoxy, a thermosetting adhesive, and an ultraviolet-curable adhesive.

[0119] The camera device (10) may include a printed circuit board (PCB) (50). The printed circuit board (50) may be a substrate 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). Various circuits, elements, control units, etc. may be provided on the printed circuit board (50) to convert an image formed on the image sensor (60) into an electrical signal and transmit it to an external device.

[0120] The camera device (10) may include an image sensor (60). The image sensor (60) may be configured to form an image by receiving light that has passed through a lens and a filter (30). 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) using surface mounting technology (SMT). As another example, the image sensor (60) may be coupled to the printed circuit board (50) using flip chip technology. The image sensor (60) may be arranged such that its optical axis is aligned 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 the effective image area of ​​the image sensor (60) into an electrical signal. The image sensor (60) can be any one of a CCD (charge coupled device), a MOS (metal oxide semi-conductor), a CPD, and a CID.

[0121] 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 due to the movement of the camera device (10). The motion sensor (70) may include a two-axis or three-axis gyro sensor or an angular velocity sensor.

[0122] The camera device (10) may include a control unit (80). The control unit (80) may be disposed 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, intensity, amplitude, etc. 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 an image stabilization function. Furthermore, the control unit (80) may perform autofocus feedback control and / or image stabilization feedback control for the lens driving device (200).

[0123] 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.

[0124]

[0125] Below, the configuration of the optical device according to the present embodiment is described with reference to the drawings.

[0126] Fig. 18 is a perspective view of an optical device according to the present embodiment.

[0127] The optical device (1) may include one or more of a mobile phone, a cell phone, a portable terminal, a mobile terminal, a smart phone, a smart pad, a portable smart device, a digital camera, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistant), a PMP (Portable Multimedia Player), and a navigation device. The optical device (1) may include any device for taking images or photographs.

[0128] An 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 disposed 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 disposed on the main body (2). The display may output one or more of a video or image captured by the camera device (10). The display may be disposed on a first surface of the main body (2). The camera device (10) may be disposed 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 disposed in a vertical direction. Alternatively, the camera device (10) may have a triple camera disposed in a horizontal direction.

[0129] Those skilled in the art will appreciate that the present invention can be implemented in modified forms without departing from the essential characteristics of the above-described description. Therefore, the disclosed methods should be considered illustrative rather than restrictive. The scope of the present invention is set forth in the claims, not the foregoing description, and all differences within the scope equivalent thereto should be construed as being encompassed by the present invention.

Claims

1. Fixed government; A moving part arranged on the above fixed part; Magnet and coil for moving the above moving part; It includes a plurality of blades that form holes whose size changes according to the movement of the moving part, An aperture device including a first magnet arranged to face one side of the coil and a second magnet arranged to face the other side of the coil.

2. In paragraph 1, An aperture device in which one side of the first magnet faces the coil and a yoke is arranged on the other side.

3. In paragraph 1, An aperture device in which one side of the second magnet faces the coil and a substrate is placed on the other side.

4. In paragraph 1, The first magnet and the second magnet each include a divided area, An aperture device in which the polarity of the divided areas of the first magnet and the second magnet is formed by alternating N and S poles.

5. In paragraph 4, An aperture device in which the polarities of the overlapping areas in the first axis direction among the divided areas of the first magnet and the second magnet have different polarities.

6. In paragraph 4, The above coil is an aperture device arranged so as to overlap two regions having different polarities in the first magnet in the first axis direction.

7. In paragraph 4, The above magnet includes an opening at a position corresponding to the above hole, An aperture device in which, when current is applied to the coil, the magnet rotates about the first axis.

8. Fixed government; A moving part arranged on the above fixed part; Magnet and coil for moving the above moving part; It includes a plurality of blades that form holes whose size changes according to the movement of the moving part, An aperture device including a first magnet arranged to face one side of the coil and a third magnet arranged to face the outer side of the first magnet.

9. In paragraph 8, The above third magnets have different polarities in the first axis direction, An aperture device in which the inner surface of the third magnet is arranged to face the outer surface of the coil.

10. In paragraph 8, An aperture device in which the inner surface of the third magnet is concave and the outer surface is convex.

Images