Aperture device, camera device and optical device

Abstract

An aperture device according to the present embodiment comprises: a fixing unit; a moving unit arranged on the fixing unit; a driving unit for moving the moving unit; and a plurality of blades having blade holes that change in size according to the movement of the moving unit, wherein: the driving unit includes a magnet arranged in the moving unit and a coil arranged in the fixing unit, and includes a sensor for sensing the position of the magnet; the coil includes a plurality of coils spaced apart from each other; and the sensor is adjacent to any one of the plurality of coils.

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 disposed on the fixed part; a driving part that moves the moving part; and a plurality of blades that form blade holes whose sizes change according to the movement of the moving part, wherein the driving part includes a magnet disposed on the moving part and a coil disposed on the fixed part, and includes a sensor that detects a position of the magnet, wherein the coil includes a plurality of coils spaced apart from each other, and the sensor is disposed adjacent to any one of the plurality of coils.

[0007] The above coil is a ring shape including a hole area, and the center point that bisects the hole areas of the plurality of coils in the radial direction and the center of the sensor can be aligned on the circumference of an imaginary circle.

[0008] The above-mentioned fixed part includes a substrate, the coil is formed as a pattern coil on the substrate, and the sensor can be placed on the substrate.

[0009] The substrate includes a core, a first coil layer disposed on one side of the core, a second coil layer disposed on the other side of the core, and an adhesive disposed between the core and the first coil layer and between the core and the second coil layer, and the sensor can be disposed on the core.

[0010] A terminal is arranged on the core, and the sensor can be connected to the terminal by wire.

[0011] The above sensor may be positioned so as not to protrude from one surface of the substrate.

[0012] The substrate includes an opening corresponding to the blade hole, and the radius of curvature of the inner surface of the hole area of ​​the coil in the circumferential direction may be equal to the radius of curvature of the opening of the substrate.

[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 disposed on the fixed part; a magnet and a coil that move the moving part; a plurality of blades that form a hole whose size changes according to the movement of the moving part; and a sensor that detects the position of the magnet, wherein the coil has a ring shape including a hole area, the coil includes a plurality of coils spaced apart from each other, and a center point that bisects the hole area of ​​the plurality of coils in a radial direction and the center of the sensor are aligned on the circumference of an imaginary circle.

[0014] The above magnets have N and S poles arranged alternately along the circumference, and the sensor can face the magnets.

[0015] The magnet may include areas having 2N polarities, and the number of coils may be N.

[0016] The above-mentioned fixed portion includes a substrate on which the coil is arranged, and the inner surface of the hole area of ​​the coil includes a first inner surface closer to the opening of the substrate and a second inner surface closer to the outer surface of the substrate, and the radius of curvature of the first inner surface may be the same as the radius of curvature of the second inner surface.

[0017] The inner side of the hole region of the coil includes a third inner side connecting the first inner side and the second inner side, and a fourth inner side opposite the third inner side, and the third inner side and the fourth inner side may have the same length.

[0018] 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.

[0019] 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.

[0020]

[0021] 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 disposed on the fixed part; a driving part that moves the moving part; and a plurality of blades that form blade holes whose sizes change according to the movement of the moving part, wherein the fixed part includes a substrate, the driving part includes a magnet disposed on the moving part and a coil disposed on the substrate, and includes a sensor that detects a position of the magnet, and a die of the sensor is disposed to face one surface of the substrate.

[0022] The die of the above sensor is placed on a pad formed on the substrate, and the pad may be an area where anisotropic conductive film (AFC) is bonded.

[0023] The above pad can be connected to a pattern coil that applies power and signals to the sensor.

[0024] The above pattern coil may include a plurality of pattern coils connected to different areas of the pad.

[0025] The above pad can overlap the die of the sensor in the optical axis direction.

[0026] The coil includes a plurality of coils spaced apart from each other, and the sensor can be placed adjacent to any one of the plurality of coils.

[0027] The above coil is a ring shape including a hole area, and the center point that bisects the hole areas of the plurality of coils in the radial direction and the center of the sensor can be aligned on the circumference of an imaginary circle.

[0028] 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; a plurality of blades that form a hole whose size changes according to the movement of the moving part; and a sensor that detects the position of the magnet, wherein the fixed part includes a substrate, and a die of the sensor is arranged to face a pad formed on the substrate.

[0029] The above pad can be connected to a pattern coil that applies power and signals to the sensor.

[0030] The above pattern coil may include a plurality of pattern coils connected to different areas of the pad.

[0031] The coil includes a plurality of coils spaced apart from each other, and the sensor can be placed adjacent to any one of the plurality of coils.

[0032] 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.

[0033] 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.

[0034]

[0035] 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 disposed on the fixed part; a driving part that moves the moving part; and a plurality of blades forming a blade hole whose size changes according to the movement of the moving part, wherein the driving part includes a magnet disposed on the moving part and a coil disposed on the fixed part, wherein the coil has a ring shape including a hole area, and the coil includes a first area and a second area that do not generate a Lorentz force, and a third area and a fourth area that generate the Lorentz force, wherein the first area and the second area are formed by one pattern coil, and the third area and the fourth area are formed by a plurality of pattern coils.

[0036] The magnet may have N and S poles arranged alternately along the circumferential direction, and the third region and the fourth region of the coil may be arranged to face different poles of the magnet.

[0037] The length in a direction perpendicular to the longitudinal direction of the first region of the coil may be smaller than the length in a direction perpendicular to the longitudinal direction of the third region of the coil.

[0038] The length in the longitudinal direction of the hole region of the coil may be less than the sum of the length in the direction perpendicular to the longitudinal direction of the third region of the coil and the length in the direction perpendicular to the longitudinal direction of the fourth region of the coil.

[0039] The magnet has N and S poles arranged alternately along the circumferential direction, and the hole area of ​​the coil can overlap the boundary surface of the N and S poles of the magnet in the optical axis direction.

[0040] The coil may include a plurality of coils spaced apart from each other, and the number of the plurality of coils may be N, when the magnet includes 2N polarity regions having different polarities.

[0041] The above fixed part includes a substrate, and the coil can be formed as a pattern coil on the substrate.

[0042] The substrate includes an opening corresponding to the blade hole, and the radius of curvature of the inner surface of the hole area of ​​the coil in the circumferential direction may be equal to the radius of curvature of the opening of the substrate.

[0043] In order to solve the above technical problem, an aperture device according to an embodiment of the present invention comprises: a fixed part; a moving part disposed on the fixed part; a magnet and a coil for moving the moving part; a plurality of blades forming a hole whose size changes according to the movement of the moving part; and the coil is a ring shape including a hole area, the coil includes a first area that does not generate a Lorentz force and a second area opposite the first area, the coil includes a third area that generates the Lorentz force and a fourth area opposite the third area, the first area and the second area connect the third area and the fourth area, and a length in a direction perpendicular to a longitudinal direction of the first area is smaller than a length in a direction perpendicular to a longitudinal direction of the third area.

[0044] The length of the hole region of the coil in the longitudinal direction may be less than the sum of the length of the third region of the coil in the direction perpendicular to the longitudinal direction and the length of the fourth region in the direction perpendicular to the longitudinal direction.

[0045] The magnet may have N and S poles arranged alternately along the circumferential direction, and the third region and the fourth region of the coil may be arranged to face different poles of the magnet.

[0046] 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.

[0047] 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.

[0048] Through this embodiment, the camera function of a smartphone can be used without performance limitations even in a dark environment.

[0049] Additionally, the sensor, magnet, and coil can be efficiently placed in an ultra-thin aperture device.

[0050] Additionally, the driving force of the moving part can be increased even in ultra-thin aperture devices.

[0051] In addition, an ultra-thin aperture device can be implemented by improving the arrangement structure of the sensor on the substrate.

[0052] Fig. 1 is a perspective view of an aperture device according to the present embodiment.

[0053] Fig. 2 is an exploded perspective view of an aperture device according to the present embodiment.

[0054] Figure 3 is a perspective view of a substrate, coil, and sensor according to the present embodiment.

[0055] Figure 4 is a cross-sectional view of the substrate, coil, and sensor of a conventional aperture device.

[0056] Figure 5 is a cross-sectional view of a substrate, coil, and sensor according to the present embodiment.

[0057] Figure 6 is a drawing for explaining the arrangement of the substrate and sensor.

[0058] Fig. 7 is a drawing for explaining the arrangement of the substrate and sensor according to the present embodiment.

[0059] Fig. 8 is a drawing for explaining the arrangement of magnets and coils according to the present embodiment.

[0060] Fig. 9 is a drawing for explaining a coil according to the present embodiment.

[0061] Fig. 10 is an exploded perspective view of a camera device according to the present embodiment.

[0062] Fig. 11 is a perspective view of an optical device according to the present embodiment.

[0063] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0064] 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.

[0065] 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.

[0066] Additionally, the terms used in this embodiment are for the purpose of describing the embodiments and are not intended to limit the present invention.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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'.

[0073] 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.

[0074]

[0075] Below, the configuration of the aperture device according to the present embodiment is described with reference to the drawings.

[0076] 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).

[0077] 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.

[0078] 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).

[0079] 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).

[0080] The base (111) may include a first protrusion (113). The first protrusion (113) may protrude upward from the upper surface of the base (111). The first protrusion (113) may be coupled with a blade (140).

[0081] 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.

[0082] 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.

[0083] 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).

[0084] The moving part (120) may include a second protrusion (121). The second protrusion (121) may protrude upward from the body of the moving part (120). The second protrusion (121) may be formed on the upper surface of the body of the moving part (120). The second protrusion (121) may be coupled with the blade (140). Through this, when the moving part (120) moves, the blade (140) may also move together.

[0085] The moving part (120) may include an escape part (122). The escape part (122) may be formed by being recessed into the outer surface of the body of the moving part (120). The escape part (122) may be an area for escaping the first protrusion (113) of the base (111) when the moving part (120) moves.

[0086] When the moving part (120) moves, the blade (140) can pivot relative to the fixed part (110). The blade (140) can rotate and move linearly at the point where it meets the fixed part (110). The blade (140) can move linearly at the point where it meets the moving part (120).

[0087] 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 (133).

[0088] 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.

[0089] The magnet (131) is movable. The magnet (131) can move through interaction with the coil (133). 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).

[0090] 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 (133) may be disposed on the substrate (132). The coil (133) may be formed on the substrate (132). For example, the coil (133) may be formed as a pattern coil on the substrate (132).

[0091] 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).

[0092] The aperture device (100) may include a coil (133). The driving unit (130) may include the coil (133). The coil (133) may be disposed on the fixing unit (110). The coil (133) may be disposed on the substrate (132). The coil (133) may be coupled to the substrate (132). The coil (133) may be soldered to the substrate (132). The coil (133) may be electrically connected to the substrate (132). The coil (133) may be formed integrally with the substrate (132). The coil (133) may be formed as a pattern coil on the substrate (132). The coil (133) may be disposed on the base (111). The coil (133) may be disposed on the base (111). The coil (133) may be disposed within the cover (112).

[0093] The coil (133) can be positioned corresponding to the magnet (131). The coil (133) can overlap the magnet (131). The coil (133) can overlap the magnet (131) in the optical axis direction. The coil (133) can face the magnet (131). The coil (133) can face the magnet (250). The coil (133) can interact with the magnet (131). The coil (133) can electromagnetically interact with the magnet (131). When current is applied to the coil (133), the magnet (131) can move due to the interaction between the electromagnetic field of the coil (133) and the electromagnetic field of the magnet (131). The coil (133) can move the magnet (131). The coil (133) can remain relatively fixed when the magnet (131) moves.

[0094] As a variation, the coil (133) may be placed on the moving part (120) and the magnet (131) may be placed on the fixed part (110). The coil (133) may move together with the moving part (120) and the magnet (131) may be fixed.

[0095] The aperture device (100) may include a sensor (161). The driving unit (130) may include the sensor (161). The sensor (161) may be disposed on a substrate (132). The sensor (161) may be electrically connected to the substrate (132). The sensor (161) may include a plurality of terminals (162) connected to the substrate (132). The sensor (161) may include four terminals (162) connected to the substrate (132). The sensor (161) may detect a magnet (131). The sensor (161) may be a Hall sensor. The sensor (161) may detect the magnetic force of the magnet (131). The sensor (161) may be disposed at a position corresponding to the magnet (131). The sensor (161) may overlap with the magnet (131) in the optical axis direction. Control of the blade (140) can be fed back in real time through the position of the magnet (131) detected by the sensor (161). That is, the blade (140) can be feedback controlled in real time by the sensor (161).

[0096] Referring to FIG. 6, the existing sensor (161) may include a plurality of terminals (162) connected to the substrate (132). The sensor (161) may include four terminals (162) connected to the substrate (132). The four terminals (162) may be arranged spaced apart from the sensor (161). The sensor (161) and the terminals (162) may be soldered on the substrate (132). The sensor (161) may be connected to the terminals (162) by a wire (163). A die connected to the terminals (162) may be formed on the upper surface of the sensor (161). The sensor (161) may be electrically connected through the die. The die of the sensor (161) may mean a silicon substrate of a sensor chip, and circuits and elements that perform the function of the sensor may be integrated. In this structure, there is a problem that there is a limit to the ultra-thin structure because the space for placing the sensor (161) on the substrate (132) requires the size of the sensor (161), the size of the soldering area, and the wire connection space together.

[0097] The sensor (161) according to the present embodiment may be placed on a pad (234) formed on a substrate (132). A die may be formed on one surface of the sensor (161), and one surface of the sensor (161) may be placed to face the substrate (132). The die of the sensor (161) may be placed to face one surface of the substrate (132). The pad (234) may be formed to have a size corresponding to that of the sensor (161). The pad (234) may be formed to have a shape corresponding to that of the die of the sensor (161). The pad (234) may overlap the die of the sensor (161) in the optical axis direction. The pad (234) may be an area where an anisotropic conductive film (AFC) bonding is performed. AFC bonding is a method of connecting electronic components to a substrate through an anisotropic conductive film for electrical connection.

[0098] The pad (234) of the substrate (132) can be connected to the pattern coil (235). The sensor (161) can receive power and signals through the pattern coil (235) and the pad (234). The pattern coil (235) can include a plurality of pattern coils (235) connected to different areas of the pad (234). The number of pattern coils (235) connected to the pad (234) can be the same as the number of dies of the sensor (161).

[0099] This allows for the sensor to be placed on the substrate without a wire connection between the sensor and the terminal, and without soldering between the sensor and the terminal and the substrate, thereby reducing the thickness due to wire connection and soldering.

[0100]

[0101] Referring to FIG. 3, the coil (133) may be ring-shaped. The coil (133) may include a plurality of coils (133) spaced apart from each other on the substrate (132). When the magnet (131) includes regions having 2N polarities, the number of coils (133) may be N. The plurality of coils (133) may each have a ring shape including a hole region. The radius of curvature of a line connecting the center points that bisect the hole regions of the plurality of coils (133) in the radial direction may be equal to the radius of curvature of the opening of the substrate (132).

[0102] The radius of curvature of the inner surface in the circumferential direction of the hole region of the coil (133) may be the same as the radius of curvature of the opening of the substrate (132). The inner surface in the circumferential direction of the hole region of the coil (133) may include a first inner surface closer to the opening of the substrate (132) and a second inner surface closer to the outer surface of the substrate (132). The radius of curvature of the first inner surface of the hole region of the coil (133) and the radius of curvature of the second inner surface may be the same. The radius of curvature of the first inner surface and the radius of curvature of the second inner surface of the hole region of the coil (133) may be the same as the radius of curvature of the opening of the substrate (132).

[0103] The length of the second inner side of the coil (133) in the circumferential direction may be greater than the length of the first inner side. The inner side in the radial direction of the hole region of the coil (133) may include a third inner side connecting the first inner side and the second inner side, and a fourth inner side opposite the third inner side. The lengths of the third inner side and the fourth inner side in the radial direction may be the same.

[0104] The center point (P) that bisects the hole areas of the plurality of coils (133) in the radial direction may coincide with a point on the circumference of an imaginary circle (L). The sensor (161) may be placed at a point on the circumference of the imaginary circle (L) of the coils (133). The center point (P) that bisects the hole areas of the plurality of coils (133) in the radial direction and the center of the sensor (161) may be aligned on the circumference of the imaginary circle (L). The center point (P) that bisects the hole areas of the plurality of coils (133) in the radial direction and the center of the sensor (161) may be identical to the center of the opening of the substrate (132).

[0105] The sensor (161) may be placed adjacent to any one of a plurality of coils spaced apart from each other. The sensor (161) may be placed adjacent to any one of two coils spaced apart from each other. The sensor (161) may not overlap the coil (133) in the optical axis direction. The sensor (161) may be placed in an area on the substrate (132) where the coil (133) is not placed. Through this, the sensor (161) may be placed in an area on the substrate (132) where the coil (133) is not placed, thereby securing design freedom.

[0106]

[0107] Referring to FIG. 4, the substrate (132) includes a core (135), a first coil layer (136) disposed on one side of the core (135), and a second coil layer (137) disposed on the other side of the core (135). An adhesive (134) may be disposed between the core (135) and the first coil layer (136) and between the core (135) and the second coil layer (137). The adhesive (134) may be a solder mask. The solder mask may be an area for protecting a circuit pattern or coil pattern formed on the substrate (132). The core (135) may be a support member for supporting the first coil layer (233) and the second coil layer (234). The core (135) may be a flexible printed circuit board. The core (135) may be made of a polyimide material.

[0108] The existing aperture device (100) has a limitation in implementing the aperture device in an ultra-thin form because the sensor (161) is soldered (S) and placed on the substrate (132). The thickness (a) of the sensor (161) placed on the substrate (132) in the optical axis direction may be approximately 60 μm when the soldering (S) area is taken into consideration. The thickness of the substrate (132) in the optical axis direction is the sum of the respective thicknesses of the first bonding region, the first coil layer (136), the core (135), the second coil layer (137), and the second bonding region from one direction to the other. The first bonding region may refer to the region between the first coil layer (136) and the upper surface of the substrate (132). The second bonding region may refer to the region between the second coil layer (137) and the lower surface of the substrate (132). The first adhesive region and the second adhesive region may be regions that cover the first coil layer (136) and the second coil layer (137), respectively, so that they are not exposed to the outside.

[0109] For example, the thickness (b) of the first bonding region in the optical axis direction and the thickness (f) of the second bonding region in the optical axis direction may be about 10 um, the thickness (c) of the first coil layer (136) in the optical axis direction and the thickness (e) of the second coil layer (137) in the optical axis direction may be about 50 um, and the thickness (d) of the core (135) in the optical axis direction may be about 30 um. That is, the thickness of the substrate (132) including the pattern coil in the optical axis direction may be about 200 um. The structure in which the sensor (161) is arranged on the substrate (132) may require an area of ​​about 260 um in the optical axis direction.

[0110]

[0111] Referring to FIG. 5, the sensor (161) according to the present embodiment may be placed on the core (135) of the substrate (132). This allows the length of the area where the sensor (161) is placed on the substrate (132) in the optical axis direction to be minimized. The sensor (161) may be placed on the core (135) of the substrate (132). The substrate (132) may include an area (138) in the core (135) where no adhesive (134) is placed. The substrate (132) may have a portion masked to form an area where the sensor (161) is placed. Some areas of the substrate (132) may not be solder-masked, so that the core (135) may be exposed to the outside. The substrate (132) may form an area where the sensor (161) is placed by forming an area (138) that is not solder-masked in some areas.

[0112] Although FIG. 5 illustrates that a sensor (161) is arranged on one side of a core (135) and a coil layer is formed on the other side of the core (135), this is for explanation in comparison with the arrangement structure of the existing substrate (132) and sensor (161), and the coil layer may not be formed in the area where the sensor (161) is arranged on the substrate (132). When the sensor (161) is arranged on one side of the core (135) of the substrate (132), the coil (133) may not be arranged on the other side of the core (135) where the sensor (161) is arranged. The area where the sensor (161) is arranged may not overlap with the coil (133) in the optical axis direction.

[0113] The sensor (161) can be connected to a terminal (162) disposed on the core (135). The sensor (161) can be connected to the terminal (162) disposed on the core (135) by a wire (163). One side of the sensor (161) can be connected to the core (135), and the other side of the sensor (161) can be connected to the terminal (162) by a wire. In this way, since the sensor (161) and the core (135) are not connected by soldering, the thickness of the sensor (161) disposed on the core (135) of the substrate (132) in the optical axis direction can be reduced.

[0114] The length of the sensor (161) in the optical axis direction may be greater than the length of the terminal (162). The sensor (161) may be positioned to face the magnet (131). The sensor (161) may be positioned on the core (135) of the substrate (132) so as not to protrude from the upper surface of the substrate (132). Through this, physical interference between the sensor (161) and the magnet (131) may be minimized.

[0115] Referring to FIG. 8, the coil (133) may be arranged along the circumferential direction of the magnet (131) and may include a first region (133a) closer to the inner surface of the magnet (131) and a second region (133b) closer to the outer surface of the magnet (131). The coil (133) may include a third region (133c) connecting the first region (133a) and the second region (133b) and a fourth region (133d) opposite the third region (133c). The hole region of the coil (133) may overlap the boundary surface of regions having different polarities of the magnet (131) in the optical axis direction.

[0116] The first region (133a) and the second region (133b) of the coil (133) may face both the N pole (131A) and the S pole (131B) of the magnet (131). The first region (133a) and the second region (133b) of the coil (133) may overlap the N pole (131A) and the S pole (131B) of the magnet (131) in the optical axis direction. The first region (133a) and the second region (133b) of the coil (133) may not face the magnet (131). The first region (133a) and the second region (133b) of the coil (133) may not overlap the magnet (131) in the optical axis direction.

[0117] The third region (133c) and the fourth region (133d) of the coil (133) may face the magnet (131). The third region (133c) and the fourth region (133d) of the coil (133) may overlap with the magnet (131) in the optical axis direction. The third region (133c) and the fourth region (133d) of the coil (133) may overlap with regions of the magnet (131) having different polarities in the optical axis direction, respectively. For example, the third region (133c) of the coil (133) may overlap with the N pole (131A) of the magnet (131) in the optical axis direction, and the fourth region (133d) of the coil (133) may overlap with the S pole (131B) of the magnet (131) in the optical axis direction.

[0118] When current is applied to the coil (133), the moving part (120) can move by electromagnetic interaction with the magnet (131). The third region (133c) and the fourth region (133d) of the coil (133) are regions that can generate the Lorentz force through electromagnetic interaction with the magnet (131). The first region (133a) and the second region (133b) of the coil (133) are regions that cannot generate the Lorentz force because they face both the N pole (131A) and the S pole (131B) of the magnet (131) or do not face the magnet (131).

[0119] When current is applied to the coil (133), the magnetic field generated around the coil (133) and the magnetic field of the magnet (131) interact to generate a Lorentz force. When current is applied to the coil (133), the moving part (120) can move due to the Lorentz force. The Lorentz force is proportional to the intensity of the current flowing in the coil (133) and the intensity of the magnetic field generated in the coil (133). The intensity of the magnetic field generated in the coil (133) is proportional to the number of turns of the coil (133). That is, the greater the number of turns of the coil (133), the greater the Lorentz force generated. The number of turns of the coil (133) may be the number of lines of the coil (133).

[0120] Referring to Fig. 9, the first region (133a) and the second region (133b), which are regions that do not generate the Lorentz force in the coil (133), can be formed by a single pattern coil. The number of turns of the first region (133a) and the second region (133b) can be 1. The first region (133a) and the second region (133b) formed by a single pattern coil can be formed to have a large cross-sectional area, thereby minimizing resistance as much as possible.

[0121] The Lorenz force can be increased by increasing the number of turns (Trun) of the third region (133c) and the fourth region (133d) by the amount of resistance decreased in the first region (133a) and the second region (133b). The third region (133c) and the fourth region (133d), which are regions that generate the Lorenz force in the coil (133), can be formed by a plurality of pattern coils that are spaced apart from each other. The number of turns (Trun) of the third region (133c) and the fourth region (133d) can be plural. The number of turns (Trun) of the third region (133c) and the fourth region (133d) can be about 20 turns. This is merely an example and is not particularly limited thereto.

[0122] The length (A) of the first region (133a) of the coil (133) in the first direction may be smaller than the length (B) of the third region (133c) of the coil (133) in the second direction. The length (B) of the first region (133a) of the coil (133) in the first direction may be smaller than the length (D) of the fourth region (133d) of the coil (133) in the second direction. The length (A) of the first region (133a) of the coil (133) in the first direction may be equal to the sum of the cross-sectional areas of the coil patterns included in the third region (133c) of the coil (133). That is, the first region (133a) of the coil (133) is formed with one pattern coil, while the third region (133c) and the fourth region (133d) of the coil (133) are formed with multiple pattern coils, and thus a space is required between the individual pattern coils, so A becomes smaller than B as described above. The size of the cross-sectional area of ​​one coil pattern of the first region (133a) of the coil (133) may be equal to the sum of the sizes of the cross-sectional areas of each of the multiple pattern coils of the third region (133c) of the coil (133).

[0123] The length (C) of the hole region of the coil (133) in the second direction may be smaller than the sum of the length (B) of the third region (133c) of the coil (133) in the second direction and the length (D) of the fourth region (133d) of the coil (133) in the second direction. Through this, the number of turns of the third region (133c) and the fourth region (133d) of the coil (133) can be secured to the maximum extent in the limited region where the coil (133) is placed, and a large Lorentz force can be generated. The length (C) of the hole region of the coil (133) in the longitudinal direction may be the distance between the third region (133c) and the fourth region (133d) of the coil (133). The length (C) in the longitudinal direction of the hole region of the coil (133) may be the shortest distance between the third region (133c) and the fourth region (133d) of the coil (133).

[0124] As shown in Fig. 9, when the outermost shape of the coil (133) is rectangular, the length of the first region (133a) of the coil (133) in the first direction and the length of the second region (133b) of the coil (133) in the first direction may be the same. When the outermost shape of the coil (133) is rectangular, the length of the first region (133a) of the coil (133) in the second direction and the length of the second region (133b) of the coil (133) in the second direction may be the same. When the outermost shape of the coil (133) is rectangular, the length of the third region (133c) of the coil (133) in the first direction and the length of the fourth region (133d) of the coil (133) in the first direction may be the same. When the outermost shape of the coil (133) is rectangular, the length (B) of the third region (133c) of the coil (133) in the second direction and the length (D) of the fourth region (133d) of the coil (133) in the second direction may be the same. When the outermost shape of the coil (133) is rectangular, the lengths of the first region (133a) and the second region (133b) of the coil (133) in the longitudinal direction may be the same as the sum of the length (B) of the third region (133c) of the coil (133) in the second direction, the length (D) of the fourth region (133d) of the coil (133) in the second direction, and the length (C) of the hole region of the coil (133) in the second direction.

[0125] As shown in FIGS. 3 and 8, when the outermost shape of the coil (133) is not rectangular, the length of the first region (133a) of the coil (133) in the longitudinal direction and the length of the second region (133b) in the longitudinal direction may be different from each other. When the outermost shape of the coil (133) is not rectangular, the length in the direction perpendicular to the longitudinal direction of the first region (133a) of the coil (133) and the length in the direction perpendicular to the longitudinal direction of the second region (133b) may be the same. When the outermost shape of the coil (133) is not rectangular, the length in the longitudinal direction of the third region (133c) of the coil (133) and the length in the longitudinal direction of the fourth region (133d) of the coil (133) may be the same. When the outermost shape of the coil (133) is rectangular, the length in the direction perpendicular to the longitudinal direction of the third region (133c) of the coil (133) and the length in the direction perpendicular to the longitudinal direction of the fourth region (133d) of the coil (133) may be the same.

[0126] Here, the first direction and the second direction may be perpendicular. The first direction and the second direction may be perpendicular to the optical axis direction. In Fig. 5, the first direction and the second direction are described as being perpendicular to each other on the premise that the outermost shape of the coil is rectangular. However, as in Figs. 3 and 8, when the outermost shape of the coil is not rectangular, the first direction and the second direction are not perpendicular to each other. The first direction may mean a vertical direction in the longitudinal direction of the first region (133a) and the second region (133b) of the coil, and the second direction may mean a vertical direction in the longitudinal direction of the third region (133c) and the fourth region (133d) of the coil. Alternatively, the first direction may be a radial direction of the first region (133a) and the second region (133b) of the coil, and the second direction may be a circumferential direction of the third region (133c) and the fourth region (133d) of the coil.

[0127] In the existing coil pattern, the number of turns (Trun) in the first region (133a) to the fourth region (133d) is the same, so the lengths of A, C, and D are formed to be the same. The coil according to the present embodiment can form a region that does not generate the Lorentz force into one pattern (or one turn (Trun)) to increase the cross-sectional area and reduce the resistance.

[0128]

[0129] 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.

[0130] 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 first protrusion (113) of the fixed part (110) is inserted. The blade (140) may include a second hole into which a second 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).

[0131] 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).

[0132] The blade (140) may include a plurality of blades. The blade (140) may include eight blades. In this case, the eight blades (140) may be arranged in two layers of four 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.

[0133] The blade (140) may include an inner surface. The inner surface may form a hole (145) through which light passes. The blade (140) may include an inner surface forming the hole (145). The inner surface may be an inner side. The inner surface may be an inner surface. The inner surface of the blade (140) may include a plurality of circular arc regions and an interpolation region formed between the plurality of circular arc regions.

[0134]

[0135] In this embodiment, when current is applied to the coil (133) of the aperture device (100), the blade (140) can move. That is, by applying current to the coil (133) 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 (133), the F number of the aperture device (100) can be changed.

[0136] The aperture device (100) may include a ball (150). The ball (150) may include a plurality of balls. The ball (150) may include four balls. 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).

[0137] The ball (150) can be placed on the moving part (120). The ball (150) can come into contact with the moving part (120). The ball (150) can move along the moving part (120). The ball (150) can move along the groove of the moving part (120). The ball (150) can be placed between the groove of the base (111) and the groove of the moving part (120). The groove of the base (111) and the groove of the moving part (120) can be rails.

[0138] 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.

[0139] The aperture device (100) may include a yoke (160). The yoke (160) may be disposed on the fixing member (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).

[0140] The yoke (160) can be positioned corresponding to the magnet (131). The yoke (160) can overlap the magnet (131) in the optical axis direction. An attractive force can be applied between the yoke (160) and the magnet (131). Through this, the ball (150) can be pressed between the moving part (120) and the fixed part (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).

[0141]

[0142] Below, the configuration of the camera device according to the present embodiment is described with reference to the drawings.

[0143] Fig. 10 is a perspective view of a camera device according to the present embodiment.

[0144] The camera device (10) may include a lens module. The lens module may include at least one lens. The lens may be positioned corresponding to the image sensor (75). The lens module may include a lens and a lens barrel. The lens module may be coupled to a holder of the lens driving device (20). The lens module may be coupled to the holder by screws and / or adhesive. The lens module may be moved integrally with the holder.

[0145] 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 from being incident on the image sensor (75). The filter (30) may be arranged parallel to the xy plane. The filter (30) may be arranged between the lens module and the image sensor (75). The filter (30) may be arranged on the sensor base (40). Alternatively, the filter (30) may be arranged on the base of the lens driving device (20). The filter (30) may include an infrared filter. The infrared filter may block light of an infrared region from being incident on the image sensor (75).

[0146] The camera device (10) may include a sensor base (40). The sensor base (40) may be disposed between the lens driving device (20) 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 (75).

[0147] 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 (20) 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 (20). The printed circuit board (50) may be electrically connected to the lens driving device (20). An image sensor (75) 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 (75) into an electrical signal and transmit it to an external device.

[0148] The camera device (10) may include an image sensor (75). The image sensor (75) may be configured to form an image by incident light passing through a lens and a filter (30). The image sensor (75) may be mounted on a printed circuit board (50). The image sensor (75) may be electrically connected to the printed circuit board (50). For example, the image sensor (75) may be coupled to the printed circuit board (50) using surface mounting technology (SMT). As another example, the image sensor (75) may be coupled to the printed circuit board (50) using flip chip technology.

[0149] The image sensor (75) can be arranged so that its optical axis is aligned with that of the lens. That is, the optical axis of the image sensor (75) and the optical axis of the lens can be aligned. The image sensor (75) can convert light irradiated to the effective image area of ​​the image sensor (75) into an electrical signal. The image sensor (75) can be any one of a CCD (charge coupled device), a MOS (metal oxide semi-conductor), a CPD, and a CID.

[0150] 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.

[0151] 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 of a lens driving device (20). The control unit (80) may individually control the direction, intensity, amplitude, etc. of the current supplied to the coil. The control unit (80) may control the lens driving device (20) to perform an autofocus function and / or a shake correction function. Furthermore, the control unit (80) may perform autofocus feedback control and / or shake correction feedback control for the lens driving device (20).

[0152] 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.

[0153]

[0154] Below, the configuration of the optical device according to the present embodiment is described with reference to the drawings.

[0155] Fig. 11 is a perspective view of an optical device according to the present embodiment.

[0156] 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.

[0157] 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.

[0158] 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; a driving unit that moves the above moving unit; and It comprises a plurality of blades forming blade holes whose size changes according to the movement of the moving part, The driving unit includes a magnet disposed on the moving unit and a coil disposed on the fixed unit, Including a sensor that detects the position of the magnet, The above coil comprises a plurality of coils spaced apart from each other, The above sensor is an aperture device arranged adjacent to one of the plurality of coils.

2. In paragraph 1, The above coil is a ring shape including a hole region, An aperture device in which the center point of the hole area of ​​the plurality of coils bisecting the hole area in the radial direction and the center of the sensor are aligned on the circumference of an imaginary circle.

3. In paragraph 1, The above fixed part includes a substrate, The above coil is formed as a pattern coil on the above substrate, The above sensor is an aperture device arranged on the above substrate.

4. In paragraph 3, The substrate includes a core, a first coil layer disposed on one side of the core, a second coil layer disposed on the other side of the core, and an adhesive disposed between the core and the first coil layer and between the core and the second coil layer. The above sensor is an aperture device arranged on the above core.

5. In paragraph 4, A terminal is placed on the above core, The above sensor is an aperture device connected by wire to the above terminal.

6. In paragraph 4, The above sensor is an aperture device arranged so as not to protrude from one surface of the above substrate.

7. In paragraph 3, The substrate includes an opening corresponding to the blade hole, An aperture device in which the radius of curvature of the inner surface of the hole area of ​​the coil in the circumferential direction is the same as the radius of curvature of the opening of the substrate.

8. Fixed government; A moving part arranged on the above fixed part; Magnet and coil for moving the above moving part; A plurality of blades forming holes whose size changes according to the movement of the moving part; and Including a sensor that detects the position of the magnet, The above coil is a ring shape including a hole region, The above coil comprises a plurality of coils spaced apart from each other, An aperture device in which the center point of the hole area of ​​the plurality of coils bisecting the hole area in the radial direction and the center of the sensor are aligned on the circumference of an imaginary circle.

9. In paragraph 8, The above magnets have N and S poles arranged alternately along the circumference, The above sensor is an aperture device facing the above magnet.

10. In paragraph 8, The above magnet comprises an area having 2N polarities, The above plurality of coils are N aperture devices.

Images