Aperture device, camera device and optical device

Abstract

An aperture device according to an embodiment of the present application includes a fixed portion, a moving portion disposed on the fixed portion, a magnet and a coil to move the moving portion, and a plurality of blades to form an aperture whose size is changed according to movement of the moving portion, wherein the magnet includes a first magnet disposed to face one surface of the coil and a second magnet disposed to face another surface of the coil.

Description

Technical Field

[0001] The technical concept of the present invention, based on exemplary and non-limiting embodiments, generally relates to aperture devices, camera devices, and optical devices. Background Technology

[0002] Recent smartphones are equipped with camera functions, enabling high-resolution photos and videos.

[0003] In particular, modern smartphone cameras are equipped with a variety of features such as autofocus, image stabilization, and zoom, which provides high satisfaction for many users.

[0004] However, existing smartphone cameras have limited performance in low-light conditions. As a result, images taken in low light often have excessive noise and reduced clarity, which causes problems. Summary of the Invention

[0005] Technical topics

[0006] This embodiment aims to provide a camera device that can be used without performance limitations even in dark environments. It also aims to provide an aperture device integrated into the aforementioned camera device.

[0007] Technical solution

[0008] To solve the above-mentioned technical problems, the aperture device according to an embodiment of the present invention may include: 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 an aperture whose size changes according to the movement of the moving part, wherein the magnet includes: a first magnet configured to face one surface of the coil; and a second magnet configured to face the other surface of the coil.

[0009] Preferably, but not necessarily, one surface of the first magnet may face the coil, and the other surface may be provided with a yoke.

[0010] Preferably, but not necessarily, one surface of the second magnet may face the coil, and the other surface may be provided with a substrate.

[0011] Preferably, but not necessarily, the first magnet and the second magnet may each include a separating region, and the polarity of the separating region of the first magnet and the separating region of the second magnet may be formed in an alternating manner of N pole and S pole.

[0012] Preferably, but not necessarily, the polarities of the separating regions in the first magnet and the second magnet that overlap in the direction of the first axis can be different.

[0013] Preferably, but not necessarily, the coil can be configured to overlap with two regions of different polarities of the first magnet in the direction of the first axis.

[0014] Preferably, but not necessarily, the magnet may include an opening at a location corresponding to the hole, and when a current is applied to the coil, the magnet rotates about a first axis that serves as its axis of rotation.

[0015] To solve the above-mentioned technical problems, the aperture device according to an embodiment of the present invention may include: 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 includes a first magnet disposed facing a surface of the coil; and a third magnet disposed facing the outer surface of the first magnet.

[0016] Preferably, but not necessarily, the third magnet may have different polarities in the direction of the first axis, and the inner surface of the third magnet may be configured to face the outer surface of the coil.

[0017] Preferably, but not necessarily, the inner surface of the third magnet may be concave, and the outer surface may be convex.

[0018] Preferably, but not necessarily, the first magnet may include a partition region, and the polarity of the partition region of the first magnet is formed by alternating N and S poles; the third magnet may be configured to face the N and S pole regions of the first magnet.

[0019] The camera device according to the 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.

[0020] The optical device according to the embodiments may include: a main body; a camera device disposed on the main body; and a display disposed on the main body, which outputs one or more of video and images captured by the camera device.

[0021] Beneficial effects

[0022] This embodiment allows for the design of ultra-thin aperture devices while maintaining driving performance.

[0023] Furthermore, as the magnetic force of the magnet increases, the need for the yoke (which is usually designed to minimize magnetic resistance) decreases, thus allowing for a reduction in the yoke thickness.

[0024] Furthermore, reducing the overall thickness of the aperture assembly allows for additional clearance between the magnet and the coil. This can improve previously limited performance aspects such as assembly yield and the linearity of the Hall sensor. Attached Figure Description

[0025] Figure 1 This is a perspective view of the aperture device according to this embodiment.

[0026] Figure 2 This is an exploded perspective view of the aperture device according to this embodiment.

[0027] Figure 3 yes Figure 1 The aperture device shown is a perspective view without the cover.

[0028] Figure 4 yes Figure 3 A top view of the aperture device shown.

[0029] Figure 5 yes Figure 3 The device shown omits a perspective view of the blades.

[0030] Figure 6 yes Figure 5 The three-dimensional view of the device shown is omitted, omitting the moving parts and magnets.

[0031] Figure 7 yes Figure 6 The three-dimensional view of the substrate is omitted from the diagram of the device shown.

[0032] Figure 8 This is a schematic diagram showing the arrangement of the magnets and coils.

[0033] Figure 9 A magnet and coil according to this embodiment are shown.

[0034] Figure 10 The magnet, coil, yoke, and substrate are shown according to this embodiment.

[0035] Figure 11 This is a diagram showing the arrangement of the magnet and coil according to this embodiment.

[0036] Figure 12 A magnet, coil, and yoke are shown according to another embodiment of the invention.

[0037] Figure 13 A magnet, coil, and yoke are shown according to another embodiment of the invention.

[0038] Figure 14 The results of torque simulation performed on a magnet and a coil according to an embodiment of the invention are shown.

[0039] Figure 15 A magnet and a coil are shown according to another embodiment of the invention.

[0040] Figure 16 Show Figure 15 The direction of the magnetic force generated in the embodiment.

[0041] Figure 17 This is an exploded perspective view of the camera device according to this embodiment.

[0042] Figure 18 This is a perspective view of the optical device according to this embodiment. Detailed Implementation

[0043] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0044] However, the technical concept of the present invention is not limited to the specific embodiments described in this specification, but can be implemented in various forms, and one or more components from the embodiments can be selectively combined or replaced within the scope of the technical concept of the present invention.

[0045] Furthermore, unless explicitly defined and described otherwise, the terms used in this embodiment (including technical and scientific terms) may be interpreted as having a meaning that would be commonly understood by one of ordinary skill in the art to which this embodiment pertains, and commonly used terms (e.g., terms defined in a dictionary) may be interpreted taking into account their contextual meaning in the relevant art.

[0046] Furthermore, the terminology used in this embodiment is for the purpose of describing the embodiments and is not intended to limit the invention.

[0047] In this specification, unless otherwise specified in the phrase, the singular form may include the plural form, and when describing “at least one of A, B and C (or one or more of them)”, it may include one or more of all possible combinations of A, B and C.

[0048] Furthermore, when describing the components of this embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended only to distinguish one component from other components, and they do not limit the nature, order, or sequence of the components.

[0049] Furthermore, when a component is described as “connected,” “linked,” or “attached” to another component, this can include not only the component being directly connected, linked, or attached to the other component, but also the component being “connected,” “linked,” or “attached” to the other component through another intermediate component.

[0050] Furthermore, when a component is described as being formed or positioned "above" or "below" another 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 positioned between the two components. Additionally, when expressed as "above" or "below," it can include not only the meaning of an upward direction relative to a component, but also the meaning of a downward direction relative to a component.

[0051] The term "optical axis direction" as used in this invention is defined as the optical axis direction of the lens and / or image sensor mounted on the lens drive device.

[0052] The term "vertical direction" as used in this invention can refer to a direction parallel to or the same as the optical axis. The vertical direction can correspond to the "z-axis direction." The term "horizontal direction" as used in this invention can refer to a direction perpendicular to the vertical direction. In other words, the horizontal direction can be a direction perpendicular to the optical axis. Therefore, the horizontal direction can include both the "x-axis direction" and the "y-axis direction."

[0053] The term "autofocus (AF)" used in this invention is defined as the function of automatically focusing on an object by adjusting the distance between the lens and the image sensor (achieved by moving the lens along the optical axis according to the distance to the object), thereby ensuring a sharp image of the object is captured on the image sensor. Furthermore, "autofocus feedback (CLAF, closed-loop autofocus) control" is defined as the process of detecting the distance between the image sensor and the lens and providing real-time feedback control to adjust the lens position, thereby improving focus adjustment accuracy.

[0054] The configuration of the aperture device according to this embodiment will now be described with reference to the accompanying drawings.

[0055] Figure 1 This is a perspective view of the aperture device according to this embodiment. Figure 2 This is an exploded perspective view of the aperture device according to this embodiment. Figure 3 yes Figure 1 The aperture device shown omits a perspective view of the cover. Figure 4 yes Figure 3 A top view of the aperture device shown. Figure 5 yes Figure 3 The device shown omits a perspective view of the blades. Figure 6 yes Figure 5 The three-dimensional view of the device shown is omitted, omitting the moving parts and magnets. Figure 7 yes Figure 6 The three-dimensional view of the substrate is omitted from the diagram of the device shown.

[0056] The aperture device (100) can 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).

[0057] An aperture device (100) may be mounted on a lens. An aperture device (100) may be mounted on a lens. An aperture device (100) may be connected to a lens. An aperture device (100) may be fixed to a lens. An aperture device (100) may move as a whole with the lens. An aperture device (100) may move together with the lens. An aperture device (100) may move together with the lens along the optical axis.

[0058] The aperture device (100) may include a fixing part (110). The fixing part (110) may be a stator. The fixing part (110) may be a part that is fixed relative to the moving part (120). The fixing part (110) may support the moving part (120) so that it can move.

[0059] The aperture device (100) may include a base (111). The fixing part (110) may include a 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 support the moving part (120) so that it can move.

[0060] The aperture device (100) may include a cover (112). The fixing part (110) may include a cover (112). The cover (112) may be disposed on the base (111). The cover (112) may be disposed on the base (111). The cover (112) may accommodate the moving part (120) inside. The cover (112) may include a top plate and a side plate extending from the top plate.

[0061] 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 body. The moving part (120) may be a mover. The moving part (120) may be a carrier.

[0062] The moving part (120) can be provided on the fixed part (110). The moving part (120) can be provided inside the fixed part (110). The moving part (120) can be movably provided inside the fixed part (110). The moving part (120) can be rotatably provided inside the fixed part (110). The moving part (120) can be provided on the base (111). The moving part (120) can be provided at the base (111). The moving part (120) can be movably provided inside the base (111). The moving part (120) can be provided inside the base (111). The moving part (120) can be provided 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) is capable of moving the blade (140). The moving part (120) can move together with the blade (140).

[0063] The moving part (120) may include a protrusion (121). The protrusion (121) may protrude upward from the main body of the moving part (120). The protrusion 121 may be formed on the upper surface of the main body of the moving part (120). The protrusion (121) may be connected to the blade (140). Therefore, when the moving part (120) moves, the blade (140) moves with it.

[0064] The aperture device (100) may include a drive unit (130). The drive unit (130) can move the moving part (120). The drive unit (130) can move the blade (140). The drive unit (130) can move the moving part (120) through electromagnetic interaction. The drive unit (130) may include a magnet (131) and a coil.

[0065] The aperture device (100) may include a magnet (131). The drive unit (130) may include a magnet (131). The magnet (131) may be disposed on the moving part (120). The magnet (131) may be disposed on the surface of the moving part (120). The magnet (131) may be annular. The magnet (131) may have a shape including an opening. The magnet (131) may have N poles and S poles alternately arranged circumferentially. The magnet (131) may be coupled to the moving part (120). The magnet (131) may be fixed to the moving part (120). The magnet (131) may be bonded to the moving part (120) by an adhesive.

[0066] The magnet (131) is movable. The magnet (131) can move by interacting with the coil. The magnet (131) can move as a single unit with the moving part (120). The magnet (131) can move together with the moving part (120). The magnet 131 can be disposed on the lower surface of the moving part (120).

[0067] The aperture device (100) may include a substrate (132). The substrate (132) may be disposed on a base (111). The substrate (132) may be disposed on top of 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). A coil may be formed on the substrate (132). For example, the coil may be formed on the substrate (132) as a patterned coil.

[0068] The substrate (132) can be electrically connected to the substrate (270) of the lens drive device (200). Through this connection, the substrate (132) can receive power from the printed circuit board (50). Although not shown in the figure, the substrate (132) of the aperture device (100) and the substrate (270) of the lens drive device (200) can be directly connected. Alternatively, separate electrical conductors can be provided to connect the substrate (132) of the aperture device (100) and the substrate (270) of the lens drive device (200). As a variation, the substrate (132) of the aperture device (100) can be directly connected to the printed circuit board (50) without being connected to the substrate (270) of the lens drive device (200).

[0069] The aperture device (100) may include a coil. The drive 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 connected 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 with the substrate (132). The coil may be formed as a patterned coil on the substrate (132). The coil may be disposed on the base (111). The coil may be disposed on the top of the base (111). The coil may be disposed inside the cover (112).

[0070] 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) along the optical axis. The coil can face the magnet (131). The coil can be positioned opposite the magnet (131). The coil can interact with the magnet (131). The coil can have electromagnetic interaction with the magnet (131). When a 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 cause the magnet (131) to move. When the magnet (131) moves, the coil can remain relatively stationary.

[0071] As a variation, the coil can be mounted on the moving part (120), and the magnet (131) can be mounted on the fixed part (110). The coil can move together with the moving part (120), while the magnet (131) remains fixed.

[0072] The aperture device (100) may include a sensor. The drive unit (130) may include a sensor. The sensor may be disposed 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 disposed at a position corresponding to the magnet (131). The sensor may overlap with the magnet (131) along the optical axis. Based on the position of the magnet (131) detected by the sensor, control of the blade (140) can be provided in real time. In other words, the blade (140) can be controlled in real time through feedback from the sensor.

[0073] The aperture device (100) may include blades (140). Blades (140) may be light-blocking components. Blades (140) may be light-shielding components. Blades (140) may be mounted on a fixed portion (110). Blades (140) may be mounted on a base (111). Blades (140) may be mounted inside a cover (112). Blades (140) may be mounted on a moving portion (120). Blades (140) may move together with the moving portion (120). In other words, when the moving portion (120) moves, the blades (140) may move with it.

[0074] The blade (140) may include a first portion connected to the fixed portion (110) and a second portion connected to the moving portion (120). Therefore, when the moving portion (120) moves, the blade (140) may pivot relative to the fixed portion (110). The blade (140) may include a first hole into which a protrusion of the fixed portion (110) is inserted. The blade (140) may include a second hole into which a protrusion (121) of the moving portion (120) is inserted. The blade (140) is capable of rotation and linear motion at its point of contact with the fixed portion (110). The blade (140) may move linearly at its point of contact with the moving portion (120).

[0075] The aperture device (100) may include an aperture (145). The blades (140) may include an aperture (145) formed by a plurality of blades (140). The size or shape of the aperture (145) may be varied by the plurality of blades (140). Light may pass through the aperture (145).

[0076] The blade (140) may include multiple blades. The blade (140) may include nine blades. In this case, the nine blades (140) may be arranged in three layers, with three blades in each layer. Multiple blades (140) may form holes (145), the size of which changes in response to movement of the moving part (120). The holes (145) may be formed by the inner circumferential surfaces (141) of the multiple blades. The blades (140) may be arranged in an odd number of blades. The blade (140) may include six blades. The blade (140) may include twelve blades. The blade (140) may include six to twelve blades.

[0077] The blade (140) may include an inner circumferential surface (141). The inner circumferential surface (141) may form an aperture (145) through which light passes. The blade (140) may include an inner circumferential surface (141) forming the aperture (145). The inner circumferential surface (141) may be an inner surface. The inner circumferential surface (141) may be an inner surface.

[0078] The inner circumferential surface (141) of the blade (140) may include multiple arcuate regions and interpolation regions formed between each pair of arcuate regions. For example, the inner circumferential surface (141) of the blade (140) may include six arcuate regions and five interpolation regions. The five interpolation regions may be positioned between the six arcuate regions.

[0079] In this embodiment, the blade (140) can move when a current is applied to the coil of the aperture device (100). In other words, the shape of the hole (145) formed by the blade (140) can be changed by applying a current to the coil of the aperture device (100). In other words, the F-value of the aperture device (100) can be changed by applying a current to the coil.

[0080] 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 contact the base (111). The ball (150) may move along the base (111). The ball (150) may move along a groove in the base (111). The ball (150) may be disposed on the moving part (120). The ball (150) may contact the moving part (120). The ball (150) may move along the moving part (120). The ball (150) may move along a groove in the moving part (120). The ball (150) can be disposed between the groove in the base (111) and the groove in the moving part (120). The groove in the base (111) and the groove in the moving part (120) can be a guide rail.

[0081] The ball (150) can guide the motion 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 restrict the moving part (120) to rotate only around the optical axis.

[0082] The ball (150) may include multiple balls. The ball (150) may include four balls.

[0083] The aperture device (100) may include a yoke (160). The yoke (160) may be disposed on the fixed part (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 with the magnet (131) in the optical axis direction. An attractive force may act between the yoke (160) and the magnet (131). Thus, the ball (150) may be pressed between the moving part (120) and the fixed part (110). The attraction between the yoke (160) and the magnet (131) can press the ball (150) between the moving part (120) and the base (111).

[0084] Figure 8 The arrangement of the magnets and coils is shown. Figure 9 The magnet and coil according to this embodiment are shown. Figure 10 The magnet, coil, yoke, and substrate according to this embodiment are shown. Figure 11 The arrangement of the magnet and coil according to this embodiment is shown. Figure 12 A magnet, coil, and yoke are shown according to another embodiment of the invention. Figure 13 The magnet, coil, and yoke are shown. Figure 14 The results of torque simulation performed on a magnet and coil according to an embodiment of the invention are shown. Figure 15 A magnet and coil according to another embodiment of the present invention are shown. Figure 16 Shown in Figure 15 The direction of the magnetic force generated in the embodiment.

[0085] Reference Figure 8The magnet (131) can be ring-shaped. The magnet (131) can have a shape including an opening. The magnet (131) can be magnetized to have multiple magnetic poles. For example, the magnet (131) can be magnetized to have eight magnetic poles arranged vertically. The polarity of any one of the multiple partitioned regions of the magnet (131) can be different from the polarity of the regions on either side. The polarity of the partitioned regions of the magnet (131) can alternate between N and S poles. The magnet (131) can be formed with N and S poles alternating in its eight partitioned regions. The magnet (131) can be formed with N and S poles alternating in its six partitioned regions. The magnet (131) can be formed with N and S poles alternating in its sixteen partitioned regions.

[0086] The magnet (131) may include a surface with an opening and an opposite surface. The polarity of the magnet (131) may be specified relative to a surface. For example, if one surface of a partitioned region of the magnet (131) is an N pole, the opposite surface may be an S pole. In this case, the partitioned region of the magnet (131) can be considered an N pole. A coil (180) may be disposed on one surface of the magnet (131). A yoke (120) may be disposed on the opposite surface of the magnet (131).

[0087] The coil (180) may include multiple coils (180: 180A–180D) arranged at a certain distance from each other. The coil (180) may be toroidal. The coil (180) may have a shape including holes. The coil (180) may be positioned facing the magnet (131) in regions with different magnetic poles in its partitioned areas. The coil (180) may be positioned to overlap with regions with different magnetic poles in the partitioned areas of the magnet (131) in the direction of a first axis. The direction of the first axis may be an optical axis. If the magnet (131) is formed with 16 partitioned areas, then four coils may be spaced apart and arranged on one surface of the magnet (131).

[0088] The yoke (120) can be configured to face the region of the magnet (131) that has different magnetic poles in its partitioned region. The yoke (120) can be configured to overlap with the region of the magnet (131) with different magnetic poles in the partitioned region in the direction of the first axis. The magnet (131) can be configured to overlap with the coil (180) in the direction of the first axis. The yoke (120) can 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 disposed on a substrate (132). The coil (180) may be connected to the substrate (132) to receive power. When current is applied to the coil (180), the magnet (131) may rotate by electromagnetic interaction with the coil (180). When current is applied to the coil (180), electromagnetic interaction with the magnet (131) may cause movement of the moving part (120) on which the magnet (131) is disposed.

[0090] Since the aperture device (100) is located inside the lens and can move along the optical axis with the lens, its internal structure must be designed to be ultra-thin. The magnet (131) and the coil are arranged to overlap along the optical axis, and the main magnetic force of the magnet (131) must be formed in the direction of the optical axis. However, when the magnet (131) and the coil are designed to be ultra-thin, there is a problem that the torque is insufficient to rotate the moving part (120).

[0091] Reference Figure 9 According to this embodiment, the magnet (131) 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 partition regions. The polarities of the facing surfaces of the first magnet (131A) and the second magnet (131B) may be different from each other. The boundary surface of the partition region of the first magnet (131A) may overlap with the boundary surface of the partition region of the second magnet (131B) in the direction of the first axis.

[0092] A coil (180) can be disposed between a first magnet (131A) and a second magnet (131B). The coil may include multiple coils (180A-180D) spaced apart from each other. The multiple coils may include first to fourth coils (180A-180D). The maximum number of coils can be half the number of partitioned regions of the magnet (131). In the initial position before the magnet (131) moves, the coil (180) can be positioned facing the S-pole region and N-pole region of the partitioned region of the first magnet (131A). In the initial position before the magnet (131) moves, the coil (180) can be positioned facing the boundary surface of the partitioned region of the first magnet (131A).

[0093] When current is applied to the coil (180), the first magnet (131A) and the second magnet (131B) can rotate by the same angle. One magnet (131A) or the other magnet (131B) can be mounted on the moving part (120), while the other can be mounted on the fixed part (110). When current is applied to the coil (180), the magnet (131) mounted on the moving part (120) can rotate, while the magnet (131) mounted on the fixed part (110) can remain stationary.

[0094] According to this embodiment, the performance of the magnets can be improved by placing magnets on both sides of the coil. This allows for maximum performance within the thickness limitations of an ultra-thin design.

[0095] Reference Figure 10 One surface of the first magnet (131A) may face the coil (180), and the yoke (21) may be disposed on the other surface. One surface of the second magnet (131B) may face the coil (180), and the substrate (132) may be disposed on the other surface. The yokes (21: 21A–21D) may be configured to overlap with the coil (180) in a first axial direction. The yokes (21) may be configured to face the boundary surface of the partitioned region of the first magnet (131A).

[0096] exist Figure 12 In another embodiment of the invention shown, the first magnet (131A) can be formed as an octagonal magnet. Three coils can be spaced apart and disposed on one surface of the first magnet (131A). One surface of the three coils can face the first magnet (131A), and the other surface can face the second magnet (131B). The three coils can be disposed at equal intervals. The three coils can be disposed at 120-degree (360 / 3) intervals. A plurality of yokes (21) can be disposed on another surface of the first magnet (131A). Eight yokes can be disposed at equal intervals on another surface of the first magnet (131A). The eight yokes can be disposed facing the boundary surfaces of a plurality of separated regions of the first magnet (131A).

[0097] exist Figure 13In another embodiment of the invention shown, the first magnet (131A) can be formed as an octagonal magnet. Five coils can be spaced apart and disposed on one surface of the first magnet (131A). One surface of the five coils can face the first magnet (131A), and the other surface can face the second magnet (131B). The five coils can be disposed at equal intervals. The five coils can be disposed at 72-degree (360 / 5) intervals. A plurality of yokes (21) can be disposed on another surface of the first magnet (131A). Eight yokes can be disposed at equal intervals on another surface of the first magnet (131A). The eight yokes can be disposed facing the boundary surfaces of a plurality of separated regions of the first magnet (131A).

[0098] Figure 14 (a) is shown in such Figure 8 The graph shown is a curve of the torque generated by the rotation angle in a structure with a single magnet. Figure 14 (b) is shown in such a way as Figure 9 The diagram shows the torque generated by the rotation angle in a structure with two magnets. When rotated 10 degrees from the initial position, the torque generated by the electromagnetic interaction between the magnets and the coil is approximately 30.4 mN·mm in the conventional structure, while it is approximately 31.2 mN·mm in the structure according to this embodiment.

[0099] In other words, when the sum of the thicknesses of the two magnets in the structure according to this embodiment along the first axis is equal to the thickness of the magnets in the existing structure along the first axis, it can be confirmed that the torque generated in the arrangement structure according to this embodiment is greater.

[0100] Table 1

[0101] As shown in Table 1, when the current applied to the coil is 40 mA and the number of coil turns is 30, placing magnets on both sides of the coil (each magnet being half the thickness of an existing magnet) can generate at least approximately 1.27 times the torque compared to the existing configuration.

[0102] Reference Figure 15 The magnet (131) may include a third magnet (131C) disposed opposite to the outer surface of the first magnet (131A). The third magnet (131C) may be configured to face the outer surface of the coil (180). The third magnet (131C) may be configured to overlap with the first magnet (131A) in a second direction perpendicular to the first axis. The third magnet (131C) may be configured to overlap with the coil (180) in the second direction.

[0103] The third magnet (131C) can be formed as a curved surface with 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) can be concave, and the outer surface can be convex. The third magnet (131C) can be formed as a block. The surface of the third magnet (131C) facing the first magnet (131A) can be flat. The third magnet (131C) can be formed as a segmented magnetization structure divided into two parts along a first axis. For example, the upper region of the third magnet (131C) can be an N pole, and the lower region of the third magnet (131C) can be an S pole.

[0104] The length of the third magnet (131C) in the direction of the second axis can be determined based on the rotation angle of the first magnet (131A). For example, the larger the rotation angle of the first magnet (131A) is designed, the longer the length of the third magnet (131C) in the direction of the second axis can be. The length of the third magnet (131C) in the direction of the second axis can be configured to correspond to the length of the outer surface of the coil (180).

[0105] Table 2

[0106] Table 3

[0107] Table 2 shows Figure 8 The simulation results are shown for the configuration where a single magnet is used. Table 3 shows the simulation results. Figure 15 The simulation results show a configuration where a third magnet is additionally disposed on the outer surface of the first magnet. Assume... Figure 8 The magnet shown and Figure 15 The first magnet shown has the same thickness along the first axis. These figures illustrate the torque generated according to the rotation angle when the same current is applied to coils with the same number of turns. Torque 1 is generated by the first coil (180A), torque 2 by the second coil (180B), torque 3 by the third coil (180C), and torque 4 by the fourth coil (180D). Referring to Tables 2 and 3, it can be confirmed that the torque increases by an average of approximately 21% for each rotation angle.

[0108] Reference Figure 16 The magnetic force generated by the third magnet (131C) is formed in the direction of the arrow, which is consistent with the rotation direction of the first magnet (131A). Therefore, since the third magnet (131C) is located on the outer surface of the first magnet (131A), it has the effect of increasing the torque in the rotation direction of the first magnet (131A).

[0109] Figure 17This is an exploded perspective view of the camera device according to this embodiment.

[0110] 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 lens barrel. The lens module (20) may be coupled to a retainer (230) of a lens drive device (200). The lens module (20) may be coupled to the retainer (230) by screws and / or adhesive. The lens module (20) may move integrally with the retainer (230).

[0111] The camera device (10) may include a filter (30). The filter (30) can be used to block light in a specific frequency band from entering the image sensor (60) after passing through the lens module (20). The filter (30) may be arranged parallel to the xy plane. The filter (30) may be disposed between the lens module (20) and the image sensor (60). The filter (30) may be disposed on the sensor base (40). As a variation, the filter (30) may be disposed on the base (210) of the lens drive device (200). The filter (30) may include an infrared filter. The infrared filter can block light in the infrared spectrum from entering the image sensor (60).

[0112] The camera device (10) may include a sensor base (40). The sensor base (40) may be disposed between the lens drive unit (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 the portion of the sensor base (40) where the filter (30) is disposed, allowing light passing through the filter (30) to enter the image sensor (60). An adhesive member may be used to bond or adhere the base (210) of the lens drive unit (200) to the sensor base (40). The adhesive member may also be used to prevent foreign objects from entering the interior of the lens drive unit (200). The adhesive member may include one or more of epoxy resin, thermosetting adhesive, and UV-curable adhesive.

[0113] The camera device (10) may include a printed circuit board (PCB) (50). The PCB (50) may be a substrate or a circuit board. A lens drive device (200) may be disposed on the PCB (50). A sensor base (40) may be disposed between the PCB (50) and the lens drive device (200). The PCB (50) may be electrically connected to the lens drive device (200). An image sensor (60) may be disposed on the PCB (50). The PCB (50) may also be equipped with various circuits, components, and control units to convert the image formed on the image sensor (60) into electrical signals and transmit them to external devices.

[0114] The camera device (10) may include an image sensor (60). The image sensor (60) may be configured such that light passing through the lens and filter (30) enters therein to form an image. 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 mounted to the printed circuit board (50) using surface mount technology (SMT). As another example, the image sensor (60) may be attached to the printed circuit board (50) using flip chip technology. The image sensor (60) may be configured such that its optical axis is aligned with the optical axis of the lens. In other words, the optical axis of the image sensor (60) and the optical axis of the lens may be aligned. The image sensor (60) may convert light incident on its effective image area into an electrical signal. The image sensor (60) may be any of a CCD (charge-coupled device), MOS (metal-oxide-semiconductor), CPD, or CID.

[0115] 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) via a circuit pattern provided on the printed circuit board (50). The motion sensor (70) may output rotational angular velocity information based on the motion of the camera device (10). The motion sensor (70) may include a 2-axis or 3-axis gyroscope sensor, or an angular velocity sensor.

[0116] 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 the coil (330) of the lens drive device (200). The control unit (80) may individually control the direction, intensity, and amplitude of the current supplied to the coil (330). The control unit (80) may control the lens drive device (200) to perform autofocus and / or image stabilization functions. In addition, the control unit (80) may perform autofocus feedback control and / or image stabilization feedback control on the lens drive device (200).

[0117] 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 electrical connection to an external device.

[0118] The structure of the optical device according to this embodiment will now be described with reference to the accompanying drawings.

[0119] Figure 18 This is a perspective view of the optical device according to this embodiment.

[0120] The optical device (1) may include one or more of the following: cellular phone, mobile phone, portable terminal, mobile terminal, smartphone, smart tablet, portable smart device, digital camera, laptop computer, digital broadcasting terminal, PDA (personal digital assistant), PMP (portable multimedia player), and navigation system. The optical device (1) may include any device for capturing video or photographs.

[0121] An optical device (1) may include a body (2). The optical device (1) may include a camera device (10). The camera device (10) may be mounted on the body (2). The camera device (10) may capture images of an object. The optical device (1) may include a display. The display may be mounted on the body (2). The display may output one or more videos and images captured by the camera device (10). The display may be mounted on a first surface of the body (2). The camera device (10) may be mounted on one or more of the first surface and a second surface opposite to the first surface of the body (2). The camera device (10) may be configured with a vertically arranged triple camera. Alternatively, the camera device (10) may be configured with a horizontally arranged triple camera.

[0122] Those skilled in the art will understand that the present invention can be implemented in modified forms without departing from the basic characteristics described above. Therefore, the disclosed methods should be considered illustrative rather than restrictive. The scope of the invention is defined by the claims rather than by the foregoing description, and all variations within the equivalent scope should be construed as included in the invention.

Claims

1. An aperture device, comprising: Fixing part; The moving part is provided on the fixed part; Magnets and coils cause the moving part to move; as well as Multiple blades form an aperture whose size changes according to the movement of the moving part. The magnet includes a first magnet positioned to face one surface of the coil and a second magnet positioned to face the other surface of the coil.

2. The aperture device according to claim 1, wherein one surface of the first magnet faces the coil, and the other surface is provided with a yoke.

3. The aperture device according to claim 1, wherein one surface of the second magnet faces the coil, and the other surface is provided with a substrate.

4. The aperture device according to claim 1, wherein both the first magnet and the second magnet include a partition region, and the polarity of the partition region of the first magnet and the polarity of the partition region of the second magnet are formed to alternate between N poles and S poles.

5. The aperture device according to claim 4, wherein the polarities of the separated regions overlapping in the direction of the first axis in the first magnet and the second magnet are different from each other.

6. The aperture device according to claim 4, wherein the coil is configured to overlap with two regions of different polarity from the first magnet in the direction of the first axis.

7. The aperture device of claim 4, wherein the magnet includes an opening at a position corresponding to the aperture, and the magnet rotates about a first axis that is its axis of rotation when a current is applied to the coil.

8. An aperture device, comprising: Fixing part; The moving part is provided on the fixed part; Magnets and coils cause the moving part to move; as well as Multiple blades form an aperture whose size changes according to the movement of the moving part. The magnet includes a first magnet positioned facing one surface of the coil and a third magnet positioned facing the outer side of the first magnet.

9. The aperture device according to claim 8, wherein the third magnet has a different polarity in the direction of the first axis, and the inner surface of the third magnet is configured to face the outer surface of the coil.

10. The aperture device according to claim 8, wherein the inner surface of the third magnet is concave and the outer surface is convex.

Images