Aperture device, camera device, and optical device

Abstract

A magnet according to an embodiment of the disclosure includes a first magnet portion magnetized in a first direction, and a second magnet portion magnetized in a second direction, the second direction being a rotational direction with respect to the first direction, wherein the first magnet portion and the second magnet portion are alternately arranged.

Description

TECHNICAL FIELD

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

[0002] Recent smartphones are equipped with a camera device function capable of capturing high-resolution photos and videos.

[0003] In particular, the cameras of recent smartphones are equipped with various functions such as an auto focus function, an optical image stabilization function, and a zoom function, thereby providing a high level of satisfaction to many users.

[0004] However, the camera of the existing smartphone has a problem in that performance is limited in a dark light environment. Therefore, an image captured in a low-illuminance condition has a large amount of noise and reduced sharpness, which is problematic. SUMMARY

[0005]

Technical Problem

[0006] The present embodiment aims to provide a camera device that can be used without being limited in performance even in a dark light environment. In addition, it also aims to provide an aperture device provided in the above camera device.

[0007]

Technical Solution

[0008] To solve the technical problem, the magnet according to the present embodiment includes a first magnet portion magnetized in a first axis direction, and a second magnet portion magnetized in a second direction, which is a rotational direction with respect to the first axis, wherein the first magnet portion and the second magnet portion are alternately disposed.

[0009] The second magnet portion is disposed on both sides of the first magnet portion, respectively, and can be disposed such that the same polarity as that of the first magnet portion faces each other.

[0010] The first magnet portion having the same polarity as that of the both side surfaces of the second magnet portion can be disposed on both sides of the second magnet portion, respectively.

[0011] The magnet has a shape including an opening, and can include an even number of divided regions.

[0012] To solve the technical problem, the aperture device according to the present embodiment includes a fixed portion, a movable portion disposed on the fixed portion, a magnet and a coil moving the movable portion, and a plurality of blades forming a hole, the size of which is changed according to the movement of the movable portion, wherein the magnet includes a first magnet portion magnetized in a first axis direction, and a second magnet portion magnetized in a second direction, which is a rotational direction with respect to the first axis, and the first magnet portion and the second magnet portion can be alternately disposed.

[0013] The second magnet is disposed on both sides of the first magnet portion, and can be disposed such that the same polarities as the polarities of the first magnet portion face each other.

[0014] The first magnet portion having the same polarities as the polarities of the two side surfaces of the second magnet portion can be disposed on both sides of the second magnet portion.

[0015] The magnet includes an opening at a position corresponding to the hole, and one surface of the magnet including the opening and the coil can be disposed to face each other.

[0016] The magnet includes an even number of divided regions, and a yoke can be disposed on the other surface of the magnet including the opening.

[0017] A camera device according to an embodiment can 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 at the lens.

[0018] An optical device according to an embodiment can include a main body, a camera device disposed in the main body, and a display disposed in the main body and configured to output at least one of an image and a video captured by the camera device.

[0019]

Advantageous Effects

[0020] According to the present embodiment, it is possible to increase a magnetic field or torque by suppressing generation of a magnetic field on an unused surface of a magnet and concentrating the magnetic field on a used surface.

[0021] Further, since the magnetic field on the unused surface of the magnet is eliminated and not generated, it is possible to minimize magnetic field interference with other magnets within a camera device module in which the aperture device is disposed.

[0022] Further, since the increase in the magnetic force of the magnet reduces the necessity of a yoke for minimizing magnetic resistance, it is possible to reduce the thickness of the yoke.

[0023] Further, since the total thickness of the aperture device can be reduced, it is possible to additionally secure a gap between the magnet and the coil. Thereby, it is possible to improve performance, such as an assembly yield and a linearity of a Hall sensor, which have been previously constrained. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a perspective view of an aperture device according to an embodiment.

[0025] Figure 2 is an exploded perspective view of an aperture device according to an embodiment.

[0026] Figure 3It is shown in Figure 1 A three-dimensional diagram showing the state of the cover omitted.

[0027] Figure 4 It is viewed from above. Figure 3 A top-down plan view of the aperture assembly.

[0028] Figure 5 It is shown in Figure 3 A 3D diagram omitting the state of the blades.

[0029] Figure 6 It is shown in Figure 5 The three-dimensional diagram omits the states of the active part and the magnet.

[0030] Figure 7 It is shown in Figure 6 The three-dimensional view omits the state of the substrate.

[0031] Figure 8 It is a view used to illustrate the magnetization and magnetic field of a magnet.

[0032] Figure 9 and Figure 10 This is a view used to illustrate the magnetization and magnetic field of a magnet according to an embodiment.

[0033] Figure 11 This is an exploded perspective view of the camera device according to an embodiment.

[0034] Figure 12 This is a perspective view of the optical device according to an embodiment. Detailed Implementation

[0035] Preferred embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0036] However, the technical ideas of this disclosure are not limited to some of the embodiments described, but can be implemented in various forms, and one or more constituent elements can be selectively combined or substituted between embodiments within the scope of the technical ideas of the embodiments.

[0037] Furthermore, the terms (including technical and scientific terms) used in this embodiment may be interpreted as having meanings that would be commonly understood by one of ordinary skill in the art to which this embodiment pertains, unless explicitly and specifically defined and described, and commonly used terms, such as those defined in a dictionary, may be interpreted in consideration of the contextual meaning of the relevant art.

[0038] Furthermore, the terminology used in this embodiment is for describing the embodiments and is not intended to limit this disclosure.

[0039] In this specification, unless specifically stated in the phrase, the singular form may include the plural form, and when described as “at least one (or more) of A, B and C”, it may include one or more of all combinations that can be combined with A, B and C.

[0040] Furthermore, when describing components of an embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended only to distinguish components from other components, and they do not limit the nature, order, or sequence of the components.

[0041] Furthermore, when a component is described as being “connected,” “linked,” or “interconnected” to another component, the component is not only directly connected, linked, or interconnected to the other component, but may also include cases where another component is inserted between them and they are “connected,” “linked,” or “interconnected” to each other.

[0042] Furthermore, when described as being formed or positioned "above" or "below" the various components, "above" or "below" means not only that the two components are in direct contact with each other, but also that one or more other components are formed or positioned between the two components. Additionally, when expressed as "above" or "below," it can include the meaning of both upward and downward directions relative to a component.

[0043] As used below, “optical axis direction” is defined as the optical axis direction of the lens and / or image sensor connected to the lens drive device.

[0044] The term "vertical direction" as used below 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 below can refer to a direction perpendicular to the vertical direction. That is, the horizontal direction can be perpendicular to the optical axis. Therefore, the horizontal direction can include both the "x-axis direction" and the "y-axis direction."

[0045] The term "autofocus (AF) function" as used below is defined as the function of automatically focusing on the subject by adjusting the distance between the lens and the image sensor by moving the lens along the optical axis according to the distance of the subject, thereby obtaining a sharp image of the subject on the image sensor. Furthermore, "closed-loop autofocus (CLAF) control" is defined as performing feedback control on the lens position in real time by detecting the distance between the image sensor and the lens, thereby enhancing the accuracy of focus adjustment.

[0046] In the following description, the configuration of the aperture device according to this embodiment will be described with reference to the accompanying drawings.

[0047] Figure 1 This is a perspective view of the aperture device according to an embodiment.Figure 2 This is an exploded perspective view of the aperture device according to an embodiment. Figure 3 It is shown in Figure 1 A three-dimensional diagram showing the state of the cover omitted. Figure 4 It is viewed from above. Figure 3 A top-down plan view of the aperture assembly. Figure 5 It is shown in Figure 3 A 3D diagram omitting the state of the blades. Figure 6 It is shown in Figure 5 The three-dimensional diagram omits the states of the active part and the magnet. Figure 7 It is shown in Figure 6 The three-dimensional view omits the state of the substrate.

[0048] The aperture device 100 can be an aperture. The aperture device 100 can adjust the amount of light passing through the lens. The aperture device 100 can adjust the amount of light incident on the image sensor 60.

[0049] The aperture device 100 can be disposed within the lens. The aperture device 100 can be disposed on the lens. The aperture device 100 can be connected to 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 together with the lens in the optical axis direction.

[0050] 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 movably support the moving part 120.

[0051] The aperture device 100 may include a base 111. The fixing part 110 may include the base 111. The base 111 may be referred to as a housing. The base 111 may be connected to the cover 112. The base 111 may house the moving part 120. The base 111 may movably support the moving part 120.

[0052] The aperture device 100 may include a cover 112. The fixing part 110 may include the cover 112. The cover 112 may be disposed in the base 111. The cover 112 may be disposed on the base 111. The cover 112 may accommodate the movable part 120 therein. The cover 112 may include a top plate and a side plate extending from the top plate.

[0053] The aperture device 100 may include a driving unit 120. The driving unit 120 may be a rotor. The driving unit 120 may be a rotating body. The driving unit 120 may be a driving unit. The driving unit 120 may be a moving element. The driving unit 120 may be a mover. The driving unit 120 may be a carrier.

[0054] The movable part 120 can be provided on the fixed part 110. The movable part 120 can be provided within the fixed part 110. The movable part 120 can be movably provided within the fixed part 110. The movable part 120 can be rotatably provided within the fixed part 110. The movable part 120 can be provided on the base 111. The movable part 120 can be provided within the base 111. The movable part 120 can be movably provided within the base 111. The movable part 120 can be provided inside the base 111. The movable part 120 can be provided inside the cover 112. The movable part 120 can rotate within the base 111. The movable part 120 can rotate within the cover 112. The movable part 120 can move the blade 140. The movable part 120 can move together with the blade 140.

[0055] The active part 120 may include a protrusion 121. The protrusion 121 may protrude upward from the body portion of the active part 120. The protrusion 121 may be formed on the upper surface of the body portion of the active part 120. The protrusion 121 may be connected to the blade 140. Thus, when the active part 120 moves, the blade 140 may also move together.

[0056] The aperture device 100 may include a drive unit 130. The drive unit 130 can move the active unit 120. The drive unit 130 can move the blade 140. The drive unit 130 can move the active unit 120 through electromagnetic interaction. The drive unit 130 may include a magnet 250 and a coil.

[0057] The aperture device 100 may include a magnet 131. The drive unit 130 may also include a magnet 131. The magnet 131 may be disposed on the active unit 120. The magnet 131 may be disposed at the active unit 120. The magnet 131 may have an annular shape. The magnet 131 may have a shape including an opening. In the magnet 131, the N pole and the S pole may be alternately arranged in the circumferential direction. The magnet 131 may be coupled to the active unit 120. The magnet 131 may be fixed to the active unit 120. The magnet 131 may be attached to the active unit 120 with an adhesive.

[0058] Magnet 131 is movable. Magnet 131 can move through interaction with the coil. Magnet 131 can move integrally with the drive unit 120. Magnet 131 can move together with the drive unit 120. Magnet 131 can be disposed on the lower surface of the drive unit 120.

[0059] The aperture device 100 may include a substrate 132. The substrate 132 may be disposed within a base 111. The substrate 132 may be disposed on the base 111. The substrate 132 may be disposed between the base 111 and the driving unit 120. A coil may be disposed on the substrate 132. The coil may be formed in the substrate 132. As an example, the coil may be formed as a patterned coil on the substrate 132.

[0060] Substrate 132 can be electrically connected to substrate 270 of lens drive device 200. Thus, substrate 132 can receive power supplied from printed circuit board 50. Although not shown in the figures, substrate 132 of aperture device 100 and substrate 270 of lens drive device 200 can be directly connected to each other. Alternatively, separate conductive members can be provided to connect substrate 132 of aperture device 100 and substrate 270 of lens drive device 200. In a variant embodiment, substrate 132 of aperture device 100 can be directly connected to printed circuit board 50 without being connected to substrate 270 of lens drive device 200.

[0061] The aperture device 100 may include a coil. The driving unit 130 may include a coil. The coil may be disposed in the fixing unit 110. The coil may be disposed in 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 in the base 111. The coil may be disposed on the base 111. The coil may be disposed inside the cover 112.

[0062] The coil can be positioned corresponding to magnet 131. The coil can overlap with magnet 131. The coil can overlap with magnet 131 along the optical axis. The coil can face magnet 131. The coil can face magnet 250. The coil can interact with magnet 131. The coil can have electromagnetic interaction with magnet 131. When current is applied to the coil, magnet 131 can move due to the interaction between the electromagnetic field of the coil and the electromagnetic field of magnet 131. The coil can move magnet 131. When magnet 131 moves, the coil can remain relatively fixed.

[0063] In a modified embodiment, the coil can be disposed on the movable part 120, and the magnet 131 can be disposed on the fixed part 110. The coil can move together with the movable part 120, and the magnet 131 can be fixed.

[0064] The aperture device 100 may include a sensor. The drive unit 130 may include a sensor. The sensor may be disposed on the substrate 132. The sensor may be electrically connected to the substrate 132. The sensor may detect a magnet 131. The sensor may be a Hall sensor. The sensor may detect the magnetic force of the magnet 131. The sensor may be disposed at a position corresponding to the magnet 131. The sensor may overlap with the magnet 131 in the optical axis direction. The position of the magnet 131 detected by the sensor can be fed back in real time to control the blade 140. That is, the blade 140 can be controlled by the real-time feedback of the sensor.

[0065] The aperture device 100 may include a blade 140. The blade 140 may be a light-blocking component. The blade 140 may be mounted on the fixed portion 110. The blade 140 may be mounted on the base 111. The blade 140 may be mounted inside the cover 112. The blade 140 may be mounted on the movable portion 120. The blade 140 may move together with the movable portion 120. That is, when the movable portion 120 moves, the blade 140 may also move together.

[0066] The blade 140 may include a first portion connected to the fixed portion 110 and a second portion connected to the movable portion 120. Thus, when the movable portion 120 moves, the blade 140 can 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 movable portion 120 is inserted. The blade 140 can rotate and perform linear motion at its portion in contact with the fixed portion 110. The blade 140 can perform linear motion at its portion in contact with the movable portion 120.

[0067] 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 can pass through the aperture 145.

[0068] 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. The multiple blades 140 may form a hole 145, the size of which changes according to the movement of the movable part 120. The hole 145 may be formed by the inner peripheral surface 141 of the multiple blades. The number of blades 140 may be odd. The blade 140 may include six blades. The blade 140 may include twelve blades. The blade 140 may include six to twelve blades.

[0069] The blade 140 may include an inner peripheral surface 141. The inner peripheral surface 141 may form a light-transmitting aperture 145. The blade 140 may include the inner peripheral surface 141 forming the aperture 145. The inner peripheral surface 141 may be an inner surface. The inner peripheral surface 141 may be an inner surface.

[0070] The inner circumferential surface 141 of the blade 140 may include multiple arcuate regions and interpolation regions formed between the multiple arcuate regions. As an 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 disposed between the six arcuate regions.

[0071] In this embodiment, the blade 140 can move when current is applied to the coil of the aperture device 100. That is, the shape of the aperture 145 formed by the blade 140 can be changed by applying current to the coil of the aperture device 100. In other words, the F-number of the aperture device 100 can be changed by applying current to the coil.

[0072] The aperture device 100 may include a ball 150. The ball 150 may be disposed between the fixed portion 110 and the movable portion 120. The ball 150 may be disposed between the base 111 and the movable portion 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 in the movable portion 120. The ball 150 may contact the movable portion 120. The ball 150 may move along the movable portion 120. The ball 150 may move along a groove in the movable portion 120. The ball 150 may be disposed between the groove in the base 111 and the groove in the movable portion 120. The grooves in the base 111 and the movable portion 120 may be guide rails.

[0073] The ball bearing 150 can guide the movement of the active part 120 in the circumferential direction. That is, the ball bearing 150 can guide the active part 120 to rotate about the optical axis. The ball bearing 150 can restrict the movement of the active part 120 so that it can only rotate about the optical axis.

[0074] Ball bearing 150 may include multiple balls. Ball bearing 150 may include 4 balls.

[0075] The aperture device 100 may include a magnetic yoke 160. The magnetic yoke 160 may be disposed in the fixing part 110. The magnetic yoke 160 may be disposed on the base 111. The magnetic yoke 160 may be disposed on the bottom plate of the base 111. The magnetic yoke 160 may be disposed on the upper surface of the bottom plate of the base 111. The magnetic yoke 160 may be disposed on the lower surface of the bottom plate of the base 111. The magnetic yoke 160 may be disposed at a position corresponding to the magnet 131. The magnetic yoke 160 may overlap with the magnet 131 in the optical axis direction. An attractive force may act between the magnetic yoke 160 and the magnet 131. Thus, the ball bearing 150 may be pressurized between the moving part 120 and the fixing part 110. The ball bearing 150 may be pressurized between the moving part 120 and the base 111 by the attractive force between the magnetic yoke 160 and the magnet 131.

[0076] Figure 8 It is a view used to illustrate the magnetization and magnetic field of a magnet, and Figure 9 and Figure 10 This is a view used to illustrate the magnetization and magnetic field of the magnet according to this embodiment.

[0077] Since the aperture device 100 is located inside the lens and can move along the optical axis with the lens, it is necessary to design the internal structure to be ultra-thin. The magnet 131 and the coil are arranged to overlap in the optical axis direction, and the main magnetic force of the magnet 131 should be formed in the optical axis direction. When the magnet 131 and the coil are designed to be ultra-thin, there is a problem that the torque used to rotate the driving part 120 becomes insufficient.

[0078] To address this issue, methods for increasing coil power include increasing the coil current, increasing the number of coil turns, and increasing the number of coils. Increasing the coil current leads to increased heat generation. Increasing the number of coil turns increases the coil thickness and the overall thickness of the aperture assembly. Increasing the number of coils increases line resistance and may not cover the allowable current of the driver IC.

[0079] Alternatively, as a method to increase the power of magnet 131, increasing the thickness of magnet 131 results in an increase in the overall thickness of the aperture device. Or, while minimizing the gap between magnet 131 and the coil can make the magnetic field stronger, it increases assembly difficulty, leading to larger tolerances and increased magnetic field deviation, resulting in increased errors in control operation.

[0080] By using the magnetization structure of the magnet 131 according to this embodiment, the magnetic field can be concentrated in one direction, and the torque between the magnet 131 and the coil can be increased without increasing the thickness of the magnet 131 and the coil.

[0081] Reference Figure 8 A magnet can have a ring shape. A magnet can have a shape that includes an opening. The cross-section of a magnet can be magnetized into multiple poles. For example, the cross-section of a magnet can be vertically magnetized with eight poles. In a magnet, the N and S poles can be alternately magnetized circumferentially in the xy-plane. A magnet can be divided into multiple poles and magnetized in the xy-plane. A magnet can be magnetized with six poles in the xy-plane. A magnet can be magnetized with eight poles in the xy-plane. A magnet can be vertically magnetized in the z-axis direction.

[0082] When viewed from a surface, such as Figure 8 A magnet magnetized in this way can be formed in a direction in which magnetic field lines emerge from the region magnetized as the N pole and enter the direction of the S pole on one side. That is to say, the magnetic force generated in a magnet magnetized as an octagon can be equally formed on one surface and the other surface.

[0083] Figure 9 (a) shows one surface of magnet 131, and Figure 9 (b) shows another surface of magnet 131. (Refer to...) Figure 9According to this embodiment, the magnet 131 can be a magnet in which vertical magnetization and horizontal magnetization methods are alternately applied. The xy plane of the magnet 131 can be referred to as one surface. The opposite side of one surface of the magnet 131 can be referred to as another surface. One surface of the magnet 131 can be referred to as the upper surface. The other surface of the magnet 131 can be referred to as the lower surface. One surface of the magnet 131 can be referred to as the used surface. The other surface of the magnet 131 can be referred to as the unused surface. One surface of the magnet 131 can be configured to face the coil. The other surface of the magnet 131 may not face the coil. A yoke can be provided on the other surface of the magnet 131. The magnet 131 may include an opening at a position corresponding to a hole formed by a plurality of blades. The surface of the magnet 131 including the opening can be configured to face the coil. The other surface of the magnet 131 including the opening can be configured to face the yoke.

[0084] Magnet 131 may include a plurality of magnets 32A to 32P divided into an even number in the xy plane. Magnet 131 may also include a plurality of magnets divided into 16 segments in the xy plane. In magnet 131, vertically magnetized magnets 32B, 32D, 32F, 32H, 32J, 32L, 32N, and 32P, and horizontally magnetized magnets 32A, 32C, 32E, 32G, 32I, 32K, 32M, and 32O may be alternately arranged. In the following text, the vertically magnetized magnet may be referred to as a first magnet portion magnetized in the direction of the first axis (z-axis), and the horizontally magnetized magnet may be referred to as a second magnet portion magnetized in the second direction (clockwise direction in the xy plane (phi-axis)). The direction of the first axis and the second direction may be perpendicular to each other. The second direction may refer to the direction of rotation relative to the first axis.

[0085] Compared to Figure 9 A surface of the magnet 131 shown in (a) may be provided with second magnet portions disposed on both sides of the first magnet portion, such that the second magnet portions with the same polarity as the first magnet portion face each other. For example, when the first magnet portion 32B has an S pole, the second magnet portions 32A and 32C disposed on both sides may be disposed such that the surfaces facing the first magnet portion 32B have an S pole.

[0086] On both sides of the second magnet portion, a first magnet portion having the same polarity as the two side surfaces of the second magnet portion can be provided. For example, on the left side of the second magnet portion 32A having N poles and S poles in the clockwise direction, a first magnet portion 32P having an N pole can be provided, and on its right side, a first magnet portion 32B having an S pole can be provided.

[0087] The first magnet section and the second magnet section are alternately arranged, and the first magnet sections can be alternately arranged in the circumferential direction to have different polarities. For example, when viewed from one surface of the magnet 131, among the first magnet sections 32B, 32D, 32F, 32H, 32J, 32L, 32N and 32P, the N-pole magnets 32B, 32F, 32J and 32N and the S-pole magnets 32D, 32H, 32L and 32P can be alternately arranged.

[0088] Compared to Figure 9 On the other surface of the magnet 131 shown in (b), the second magnet portions disposed on both sides of the first magnet portion can be configured such that their polarities, which are different from those of the first magnet portion, face each other. For example, when the first magnet portion 32B has an N pole, the second magnet portions 32A and 32C disposed on both sides can be configured such that the surfaces facing the first magnet portion 32B have an S pole.

[0089] First magnet portions may be provided on both sides of the second magnet portion, and the first magnet portions have polarities different from the polarities of the two side surfaces of the second magnet portion. For example, a first magnet portion 32P with an S pole may be provided on the left side of the second magnet portion 32A, which has N poles and S poles in a clockwise direction, and a first magnet portion 32B with an N pole may be provided on its right side.

[0090] Will Figure 9 One surface of the magnet 131 shown in (a) is with Figure 9 Comparing the other surface of magnet 131 shown in (b), since the first magnet portions 32B, 32D, 32F, 32H, 32J, 32L, 32N, and 32P are magnetized in the z-axis direction, their polarities observed from one surface and from the other surface are different. Since the second magnet portions 32A, 32C, 32E, 32G, 32I, 32K, 32M, and 32O are magnetized in a clockwise direction, their polarities observed from one surface and from the other surface are the same.

[0091] Figure 10 The magnetic field is shown as viewed from a cross-section of magnet 131. Specifically, Figure 10 (a) shows the combined magnetic field of the first magnet section and the magnetic field of the second magnet section. Figure 10 (b) shows the magnetic field of the first magnet section, and Figure 10 (c) shows the magnetic field of the second magnet section.

[0092] Reference Figure 10(b) A plurality of first magnet portions may be arranged along the x-axis direction, including a magnet having N and S poles in the z-axis direction, a magnet having S and N poles in the z-axis direction, and a magnet having N and S poles in the z-axis direction. The plurality of first magnet portions may be configured to have N, S, and N poles polarity relative to the upper side, and S, N, and S poles polarity relative to the lower side. Magnetic field lines emanating from the N pole relative to the upper side may enter the central S pole, and magnetic field lines emanating from the central N pole relative to the lower side may enter the S poles on both sides.

[0093] Reference Figure 10 (c) Multiple second magnet sections can be arranged in the x-axis direction, including a magnet having N and S poles in the x-axis direction and a magnet having S and N poles in the x-axis direction. In the multiple second magnet sections, magnetic field lines can emanate from the N pole and enter the S pole on both the upper and lower sides.

[0094] Reference synthesis Figure 10 (b) and Figure 10 The magnetic field of (c) Figure 10 As shown in (a), since the magnetic field lines of the first magnet portion and the second magnet portion are formed equally from both sides toward the center, the upward magnetic field lines increase. It can also be confirmed that the downward magnetic field lines are canceled out by the magnetic field lines of the first magnet portion forming from the center toward both sides and the magnetic field lines of the second magnet portion forming from both sides toward the center. In other words, according to this embodiment, by alternating the arrangement of magnets magnetized by different magnetization methods, the magnetic field can be concentrated in one direction and strengthened.

[0095] According to an embodiment, by suppressing the generation of a magnetic field on the unused surface of the magnet and concentrating the magnetic field on the used surface, the magnetic field or torque can be increased by up to two times compared to conventional structures. Furthermore, since the magnetic field on the unused surface of the magnet is canceled out and not generated, magnetic field interference with other magnets in a camera module equipped with an aperture device can be minimized.

[0096] Furthermore, the increased magnetic force of the magnet reduces the need for a yoke to minimize magnetoresistance, allowing for a reduction in yoke thickness. Additionally, the reduced overall thickness of the aperture assembly further ensures better clearance between the magnet and the coil. This improves previously limited performance aspects such as assembly yield and the linearity of the Hall sensor.

[0097] Figure 11 This is an exploded perspective view of the camera device according to this embodiment.

[0098] 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 the 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 be integrally movable with the retainer 230.

[0099] Camera device 10 may include a filter 30. The filter 30 can be used to block light of a specific frequency band passing through lens module 20 from incident on image sensor 60. The filter 30 can be configured to be parallel to the xy plane. The filter 30 can be disposed between lens module 20 and image sensor 60. The filter 30 can be disposed on sensor base 40. In a variant embodiment, filter 30 can be disposed on base 210 of lens drive device 200. Filter 30 may include an infrared filter. The infrared filter can block light in the infrared region from incident on image sensor 60.

[0100] The camera device 10 may include a sensor base 40. The sensor base 40 may be disposed between the lens drive device 200 and the printed circuit board 50. The sensor base 40 may include a protrusion 41 on which a filter 30 is disposed. An opening may be formed in 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 connect or bond the base 111 of the lens drive device 200 to the sensor base 40. The adhesive member may also be used to prevent foreign objects from being introduced into the lens drive device 200. The adhesive member may include at least one of epoxy resin, thermosetting adhesive, and UV-curable adhesive.

[0101] Camera device 10 may include a printed circuit board (PCB) 50. The PCB 50 may be a substrate or a circuit board. A lens driving device 200 may be disposed on the PCB 50. A sensor base 40 may be disposed between the PCB 50 and the lens driving device 200. The PCB 50 may be electrically connected to the lens driving device 200. An image sensor 60 may be disposed on the PCB 50. The PCB 50 may be equipped with various circuits, components, control units, etc., to convert the image formed on the image sensor 60 into electrical signals and transmit the electrical signals to external devices.

[0102] Camera device 10 may include image sensor 60. Image sensor 60 may be configured such that light passing through lens and filter 30 is incident to form an image. Image sensor 60 may be mounted on printed circuit board 50. Image sensor 60 may be electrically connected to printed circuit board 50. As an example, image sensor 60 may be connected to printed circuit board 50 via surface mounting technology (SMT). As another example, image sensor 60 may be connected to printed circuit board 50 via flip chip technology. Image sensor 60 may be configured such that its optical axis coincides with the optical axis of the lens. That is, the optical axis of image sensor 60 and the optical axis of lens may be aligned. Image sensor 60 may convert light incident on the effective image area of ​​image sensor 60 into an electrical signal. Image sensor 60 may be any of charge-coupled device (CCD), metal-oxide-semiconductor (MOS), CPD, and CID.

[0103] 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 is capable of outputting rotational angular velocity information caused by the movement of the camera device 10. The motion sensor 70 may include a 2-axis or 3-axis gyroscope sensor or an angular velocity sensor.

[0104] The camera device 10 may include a control unit 80. The control unit 80 may be mounted 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 can independently control the direction, intensity, amplitude, etc., of the current supplied to the coil 330. The control unit 80 can control the lens drive device 200 to perform autofocus and / or optical image stabilization functions. Furthermore, the control unit 80 can perform autofocus feedback control and / or optical image stabilization feedback control on the lens drive device 200.

[0105] The camera device 10 may include a connector 90. The connector 90 may be electrically connected to the printed circuit board 50. The connector 90 may include a port for electrical connection to an external device.

[0106] In the following description, the configuration of the optical device according to this embodiment will be described with reference to the accompanying drawings.

[0107] Figure 12 This is a perspective view of the optical device according to this embodiment.

[0108] Optical device 1 may include at least one of mobile phones, cellular phones, portable terminals, mobile terminals, smartphones, smart tablets, portable smart devices, digital camera devices, laptop computers, digital broadcasting terminals, personal digital assistants (PDAs), portable multimedia players (PMPs), and navigation devices. Optical device 1 may include any device for capturing images or photographs.

[0109] The optical device 1 may include a main body 2. The optical device 1 may include a camera device 10. The camera device 10 may be disposed within the main body 2. The camera device 10 can capture a subject. The optical device 1 may include a display. The display may be disposed within the main body 2. The display can output at least one of an image and a video 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 at least one of the first surface and a second surface opposite to the first surface of the main body 2. In the camera device 10, three cameras may be arranged vertically. Alternatively, in the camera device 10, three cameras may be arranged horizontally.

[0110] Those skilled in the art to which this embodiment pertains will understand that this disclosure can be implemented in variations without departing from the basic characteristics described above. Therefore, the disclosed methods should be considered from an illustrative rather than a restrictive perspective. The scope of this disclosure is defined by the claims rather than the foregoing description, and all differences within the equivalent scope should be construed as included in this disclosure.

Claims

1. A magnet, comprising: The first magnet part is magnetized in the first axial direction; as well as The second magnet part is magnetized in a second direction, which is the rotational direction relative to the first axis. The first magnet section and the second magnet section are alternately arranged.

2. The magnet according to claim 1, in, The second magnet portion is disposed on both sides of the first magnet portion, and the second magnet portion is configured such that its polarity is the same as that of the first magnet portion and they face each other.

3. The magnet according to claim 1, in, The first magnet portion is provided on both sides of the second magnet portion, and the first magnet portion has the same polarity as the two side surfaces of the second magnet portion.

4. The magnet according to claim 1, in, The magnet has a shape including an opening, and The magnet includes a number of regions divided into an even number.

5. An aperture device, comprising: Fixing part; The active part is provided on the fixed part; The magnet and the coil are configured to move the active part; as well as Multiple blades form holes, the size of which changes according to the movement of the moving part. The magnet includes: The first magnet part is magnetized in the first axial direction; and The second magnet portion is magnetized in a second direction, which is the rotational direction relative to the first axis, and The first magnet section and the second magnet section are alternately arranged.

6. The aperture device according to claim 5, in, The second magnet portion is disposed on both sides of the first magnet portion, and the second magnet portion is configured such that its polarity is the same as that of the first magnet portion and they face each other.

7. The aperture device according to claim 5, in, The first magnet portion is provided on both sides of the second magnet portion, and the first magnet portion has the same polarity as the two side surfaces of the second magnet portion.

8. The aperture device according to claim 5, in, The magnet includes an opening at a position corresponding to the hole, and In this embodiment, one surface of the magnet, including the opening, is configured to face the coil.

9. The aperture device according to claim 5, in, The magnet comprises an even number of regions, and A magnetic yoke is provided on another surface of the magnet, including the opening.

10. A camera device, comprising: Printed circuit boards; An image sensor is mounted on the printed circuit board; A lens is mounted on the image sensor; as well as The aperture device according to any one of claims 1 to 9 is disposed in the lens.

Images