Reflective module and camera module comprising a reflective module

Abstract

A reflection module is provided. The reflection module includes a housing; a guide member disposed in the housing and configured to rotate about a first rotation axis; a bracket including a reflection member and configured to rotate about a second rotation axis perpendicular to the first rotation axis with respect to the guide member; a first driving unit including a first magnet disposed on the bracket and a first coil disposed on the housing to face the first magnet; and at least one pair of first position sensors disposed on one surface of the housing, wherein the first position sensors of the at least one pair of first position sensors are disposed symmetrically with respect to a center of the first coil. A camera module is also provided.

Description

[0001] Cross-reference to related applications

[0002] This application claims the priority of Korean Patent Application No. 10-2025-0049100, filed on April 15, 2025, with the Korean Intellectual Property Office, and Korean Patent Application No. 10-2025-0096949, filed on July 17, 2025, the entire disclosure of which is incorporated herein by reference for all purposes. Technical Field

[0003] The following description relates to a reflection module and a camera module that includes a reflection module. Background Technology

[0004] Such camera modules have been implemented in mobile devices, in which a reflective element is positioned in front of the lens module to bend the light propagation path.

[0005] This type of camera module can perform optical image stabilization (OIS) during image capture by rotating a reflective component around two axes perpendicular to each other.

[0006] Therefore, it is desirable to perform precise sensing of the position of the reflective component in advance in order to perform accurate OIS operations and improve image resolution.

[0007] When the rotation axis of the reflective component is not aligned with the position of the sensor, the sensing error may also increase with the increase of the stroke angle, which leads to the need for a structure to reduce the sensing error. Summary of the Invention

[0008] The summary portion of this invention is intended to provide a brief overview of the chosen concepts, which will be further described in the detailed description portion below. This summary portion is not intended to identify key or essential features of the claimed subject matter, nor is it intended to help determine the scope of the claimed subject matter.

[0009] In general, the reflective module includes: a housing; a guide member disposed in the housing and configured to rotate about a first rotation axis; a support including the reflective member and configured to rotate relative to the guide member about a second rotation axis perpendicular to the first rotation axis; a first drive unit including a first magnet disposed on the support and a first coil disposed on the housing facing the first magnet; and at least one pair of first position sensors disposed on a surface of the housing, wherein the first position sensor of the at least one pair of first position sensors is symmetrically disposed with respect to the center of the first coil.

[0010] At least one pair of first position sensors can be arranged in a direction parallel to the first rotation axis.

[0011] Each of at least one pair of first position sensors may be configured to be spaced apart from the center of the first coil in a direction parallel to the first rotation axis.

[0012] Based on an imaginary plane perpendicular to the first rotation axis and including the second rotation axis, in at least one pair of first position sensors, the number of first position sensors facing the first side of the imaginary plane can be equal to the number of first position sensors facing the second side of the imaginary plane.

[0013] The distance between the first position sensor on the first side facing the imaginary plane and the imaginary plane can be equal to the distance between the first position sensor on the second side facing the imaginary plane and the imaginary plane.

[0014] The reflective module may also include at least one pair of first sensing magnets disposed on a bracket, and the at least one pair of first sensing magnets may face at least one pair of first position sensors.

[0015] A first position sensing unit, comprising at least one pair of first position sensors and at least one pair of first sensing magnets, can be configured to sum the sensing results received from each of the first position sensors.

[0016] Each of the first magnet and the first sensing magnet of the first driving unit may have two polarities arranged in a direction parallel to the first rotation axis, and the areas where the first magnet and the first sensing magnet of the first driving unit face each other may have the same polarity.

[0017] At least one pair of first position sensors can be arranged in a direction parallel to the second rotation axis.

[0018] An imaginary plane perpendicular to the first rotation axis and including the second rotation axis can pass through at least one pair of first position sensors.

[0019] The reflection module may also include a first ball component disposed between the support and the guide component and including a plurality of balls spaced apart from each other along a second axis of rotation.

[0020] The reflection module may also include a second driving unit, which includes a second magnet disposed on a corresponding side surface of the guide member and a second coil disposed on the housing to face the second magnet, wherein the corresponding side surface of the guide member may be perpendicular to the second rotation axis.

[0021] The reflection module may also include a second ball component disposed between the guide member and the housing, the second ball component including a central ball forming the first rotation axis and a guide ball supporting the guide member.

[0022] In general, the camera module includes: a bracket on which a reflective member is mounted; a guide member on which the bracket is disposed and which is configured to rotate together with the bracket about a first rotation axis; a housing housing the bracket and the guide member; a lens module through which light reflected from the reflective member passes in the optical axis direction; a first drive unit including a first magnet mounted on the bracket and a first coil facing the first magnet in the optical axis direction; and at least a pair of first position sensors disposed on a surface of the housing, wherein the bracket is configured to rotate relative to the guide member about a second rotation axis perpendicular to the first rotation axis, and wherein the first position sensor of the at least pair of first position sensors is symmetrically disposed with respect to an imaginary center line extending along the optical axis.

[0023] Each of at least one pair of first position sensors can be configured to be spaced apart from an imaginary center line in a direction parallel to the first rotation axis.

[0024] The shortest distance between each of at least one pair of first position sensors and the imaginary centerline can be equal to each other.

[0025] In general, the camera module includes a housing; a guide member disposed within the housing and configured to rotate about a first axis; a bracket including a reflective member and configured to rotate relative to the guide member about a second axis perpendicular to the first axis; and a first position sensing unit configured to detect rotation of the bracket, wherein the first position sensing unit includes: a plurality of first sensing magnets disposed on a surface of the bracket facing the housing in the first axial direction; and a plurality of first position sensors disposed on the housing to face the plurality of first sensing magnets respectively.

[0026] At least one of the plurality of first sensing magnets may include a combination of a pair of monopole magnets with different polarities.

[0027] Multiple first sensing magnets can be aligned along a third axis perpendicular to the first and second axes, and arranged symmetrically with respect to the second axis.

[0028] The support may also include a protrusion extending toward the guide member in a first axial direction, wherein the guide member may include an opening through which at least a portion of the protrusion passes, and wherein a first sensing magnet may be disposed on the protrusion.

[0029] The camera module may also include a first drive unit configured to provide driving force to the bracket, wherein the first drive unit may include a first magnet and a first coil, the first magnet being disposed on a surface of the bracket facing the housing in a third axial direction, and the first coil being disposed facing the first magnet.

[0030] The first magnet may include a combination of a pair of monopole magnets with different polarities.

[0031] The camera module may also include a second drive unit configured to provide driving force to the guide member, wherein the second drive unit may include a second magnet and a second coil, the second magnet being disposed on a surface of the guide member facing the housing in a second axial direction, and the second coil being disposed facing the second magnet.

[0032] The second magnet may include a combination of a pair of monopole magnets with different polarities.

[0033] The camera module may also include a plurality of ball components disposed between the guide member and the housing, wherein the plurality of ball components may include a central ball located on the first axis and a plurality of guide balls supporting the rotation of the guide member.

[0034] Other features and aspects will become apparent from the following detailed description and accompanying drawings. Attached Figure Description

[0035] Figure 1 A perspective view of an exemplary camera module according to one or more embodiments is shown.

[0036] Figure 2 It shows Figure 1 An exploded perspective view of the exemplary camera module shown.

[0037] Figure 3 It shows Figure 1 The exemplary camera module shown is a perspective view after the housing has been removed.

[0038] Figure 4 A perspective view of an exemplary reflection module according to a first exemplary embodiment is shown.

[0039] Figure 5 It shows Figure 4 An exploded perspective view of the exemplary reflection module shown.

[0040] Figure 6 It shows Figure 5 A view of the bottom surface of the exemplary reflective module shown.

[0041] Figure 7 It shows along Figure 4 The exemplary reflective module shown is a cross-sectional perspective view taken along line I-I'.

[0042] Figure 8 It shows along Figure 4 The cross-sectional view of the exemplary reflective module shown is taken from line II-II'.

[0043] Figure 9 It shows Figure 4 The example reflection module shown is the main view.

[0044] Figure 10 A schematic view of the driving of the reflection module according to a first exemplary embodiment is shown.

[0045] Figure 11 It shows Figure 10 A comparative view of the exemplary reflection module shown.

[0046] Figure 12 A graph showing the change in magnetic field strength based on the rotation angle sensing of the reflection module is presented.

[0047] Figure 13 A perspective view of an exemplary reflection module according to a second exemplary embodiment is shown.

[0048] Figure 14 It shows Figure 13 The main view of the reflection module shown.

[0049] Figure 15 A perspective view is shown of a second lens module separated from an exemplary camera module according to one or more embodiments.

[0050] Figure 16 It shows Figure 15 A view of the bottom surface of the second lens module shown.

[0051] Figure 17 An exploded perspective view of an exemplary camera module according to one or more embodiments is shown.

[0052] Figure 18 This shows a different perspective. Figure 17 An exploded perspective view of the exemplary camera module shown.

[0053] Figure 19 It shows Figure 17 The three-dimensional view of the shell shown.

[0054] Figure 20 A view of the XY section of an exemplary camera module according to one or more embodiments is shown.

[0055] Figure 21 and Figure 22 This is a view illustrating the rotation drive of a bracket included in an exemplary camera module according to one or more embodiments.

[0056] Throughout the accompanying drawings and detailed embodiments, the same reference numerals refer to the same elements unless otherwise described. For purposes of clarity, illustration, and convenience, the drawings may not be drawn to scale, and the relative dimensions, scale, and descriptions of elements in the drawings may be exaggerated. Detailed Implementation

[0057] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will become apparent upon understanding the disclosure of this application. For example, the order of operations described herein and / or the sequence of operations described herein are merely examples and are not limited to the order set forth herein, except for the order of operations and / or the order of operations which must occur in a specific sequence, but can be varied, as will become apparent upon understanding the disclosure of this application. As another example, the order of operations and / or the order of operations can be performed in parallel, except for the order of operations and / or at least a portion of the order of operations which must occur in a sequence (e.g., a specific sequence). Furthermore, for clarity and conciseness, descriptions of features known upon understanding the disclosure of this application may be omitted.

[0058] Although terms such as “first,” “second,” and “third,” or A, B, (a), (b), may be used herein to describe various components, parts, regions, layers, or sections, these components, parts, regions, layers, or sections are not limited by these terms. Each of these terms is not intended to define, for example, the importance, sequence, or order of the corresponding component, part, region, layer, or section, but only to distinguish the corresponding component, part, region, layer, or section from other components, parts, regions, layers, or sections. Therefore, without departing from the teachings of the examples described herein, the first component, first part, first region, first layer, or first section mentioned in these examples may also be referred to as the second component, second part, second region, second layer, or second section.

[0059] Throughout this specification, when a component, element, or layer is described as "on another component, element, or layer," "connected to," "attached to," or "joined to" another component, element, or layer, it may be directly "on another component, element, or layer," directly "connected to," "attached to," or "joined to" another component, element, or layer (e.g., in contact with another component, element, or layer), or one or more other components, elements, or layers may reasonably be present between that component, element, or layer and that other component, element, or layer. When a component, element, or layer is described as "directly on another component, element, or layer," "directly connected to," "directly attached to," or "directly joined to" another component, element, or layer, then there are no other components, elements, or layers between that component, element, or layer and that other component, element, or layer. Similarly, expressions such as "between" and "directly between," and "adjacent" and "directly adjacent" may also be interpreted as described above.

[0060] The terminology used herein is for illustrative purposes only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the terms “a,” “an,” and “the” are intended to include the plural forms as well. As non-limiting examples, the terms “comprising,” “including,” and “having” indicate the presence of the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof, or alternatives to the stated features, quantities, operations, components, elements, and / or combinations thereof. Furthermore, while one embodiment may use the terms “comprising,” “including,” and “having” to indicate the presence of the stated features, quantities, operations, components, elements, and / or combinations thereof, other embodiments may exist in which one or more of the stated features, quantities, operations, components, elements, and / or combinations thereof are absent.

[0061] As used herein, the term “and / or” includes any one of the associated listed items and any combination of any two or more items. Phrases such as “at least one of A, B, and C” are intended to have a disjunctive meaning, and these phrases also include examples in which one or more of A, B, and C may be present (e.g., any combination of one or more of A, B, and C), unless the corresponding description and embodiments require that the enumeration (e.g., “at least one of A, B, and C”) be interpreted as having a conjunctive meaning.

[0062] The features described herein may be embodied in various forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein are provided merely to illustrate some of the many possible ways in which the methods, apparatus, and / or systems described herein will be apparent upon understanding the disclosure of this application. In this document, the use of the term “may” (e.g., regarding what an example or embodiment may include or implement) with respect to an example or embodiment means that there exists at least one example or embodiment that includes or implements such a feature, and that all examples or embodiments are not limited thereto. The terms “example” or “embodiment” as used herein have the same meaning (e.g., the phrase “in one example” has the same meaning as “in one embodiment,” and “in one or more examples” has the same meaning as “in one or more embodiments”).

[0063] In the exemplary embodiments disclosed in the specification, unless otherwise stated, the configurations included in the exemplary embodiments may also be included in another exemplary embodiment.

[0064] One or more examples relate to a camera module, which can be installed in a portable electronic device such as, but not limited to, a mobile communication terminal, a smartphone, or a tablet personal computer (PC).

[0065] One or more examples may provide a reflective module and a camera module including the reflective module, which has improved sensitivity and linearity for position sensing of a rotating reflective member.

[0066] Reference Figure 1 and Figure 2 According to an exemplary embodiment, the reflection module 300 and the camera module 1000 including the reflection module 300 may include a drive unit and a position sensor for realizing optical image stabilization (OIS) during image capture.

[0067] However, when the reflection module 300 performs a tilt rotation (i.e., a rotation drive about the Y-axis in the figure), if the camera module 1000 uses only one position sensor spaced apart from the first coil 420, the rotation center may be misaligned and errors may occur.

[0068] According to an exemplary embodiment, the reflection module 300 and the camera module 1000 including the reflection module 300 can be symmetrically provided with a pair of position sensors 472a and 472b (see Figure 4 The sensing results are summed to achieve accurate and highly linear position sensing.

[0069] In the following, the detailed configuration of the reflection module 300 and the camera module 1000 including the reflection module 300 according to exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0070] Figure 1 This is a perspective view of a camera module 1000 according to an exemplary embodiment. Figure 2 yes Figure 1 An exploded perspective view of the camera module 1000 shown. Figure 3 yes Figure 1 The image shows a perspective view of the camera module 1000 after the housing 120 has been removed. Figure 4 This is a perspective view of the reflection module 300 according to the first exemplary embodiment. Figure 5 yes Figure 4 The exploded perspective view of the reflection module 300 shown. Figure 6 It is shown Figure 5 A view of the bottom surface of the reflective module 300 shown.

[0071] Reference Figures 1 to 6 According to an exemplary embodiment, the camera module 1000 may include a first lens module 210, a reflection module 300, a second lens module 220, and a housing 110.

[0072] The first lens module 210 may include at least one lens and a first lens barrel. The at least one lens may have a first optical axis (X-axis) and may be mounted in the first lens barrel. The first optical axis (X-axis) may be as follows: Figure 1 As shown, it extends in the vertical direction.

[0073] The first lens module 210 can be disposed in front of the reflection module 300. Here, "in front of" can refer to the positive direction (+X-axis direction) of the first optical axis (X-axis) relative to the reflection module 300. For example, the first lens module 210 can be disposed above the reflection module 300 in the direction of the first optical axis (X-axis).

[0074] The first lens module 210 can be connected to the reflection module 300. In the example, the first lens module 210 can be connected to the bracket 320 of the reflection module 300.

[0075] The reflection module 300 may include a reflection member 310, and the reflection member 310 may have a reflective surface that reflects light passing through the first lens module 210. As a non-limiting example, the reflection member 310 may be implemented as a prism or a mirror. The reflection member 310 may be coupled to the bracket 320.

[0076] The first lens module 210 and the reflection module 300 can be housed in the housing 110.

[0077] In an exemplary embodiment, the camera module 1000 may further include a second lens module 220. The reflection module 300 may be disposed between the first lens module 210 and the second lens module 220. The second lens module 220 may include a plurality of lenses and a second lens barrel 221 (see...). Figure 15 Multiple lenses may have a second optical axis (Z-axis) and may be mounted in the second lens barrel 221. That is, the second lens module 220 may be configured to allow light reflected from the reflecting member 310 to pass through in the direction of the second optical axis (Z-axis).

[0078] Reference Figure 3 The first optical axis (X-axis) of the first lens module 210 and the second optical axis (Z-axis) of the second lens module 220 can be perpendicular to each other.

[0079] The first lens module 210 may include at least one lens, and the second lens module 220 may include multiple lenses.

[0080] When viewed along the first optical axis (X-axis), at least one lens of the first lens module 210 may be circular. Among the plurality of lenses of the second lens module 220, at least one lens may be non-circular when viewed along the second optical axis (Z-axis). In the example, the non-circular lens may have different lengths in two directions perpendicular to each other and perpendicular to the second optical axis (Z-axis). In an exemplary embodiment, the length of the non-circular lens in the direction of the first axis (Y-axis) perpendicular to both the first optical axis (X-axis) and the second optical axis (Z-axis) may be greater than its length in the direction of the first optical axis (X-axis).

[0081] In the example, although the specification describes the camera module 1000 as including a first lens module 210 and a second lens module 220, the camera module 1000 is not limited to this, and in the example, the camera module 1000 may include only one of the first lens module 210 and the second lens module 220.

[0082] In an exemplary embodiment, the first lens module 210 and the reflective member 310 can rotate together to achieve optical image stabilization. That is, the first lens module 210 and the reflective member 310 can rotate together about two axes perpendicular to each other.

[0083] In the example, the first lens module 210 and the reflective member 310 can rotate together about the first optical axis (X-axis) and can also rotate together about a first axis (Y-axis) that is perpendicular to both the first optical axis (X-axis) and the second optical axis (Z-axis).

[0084] In an exemplary embodiment, the second lens module 220 can be moved along the second optical axis (Z-axis) to achieve optical zoom function, autofocus (AF) function, etc.

[0085] The camera module 1000 in this exemplary embodiment may also include an image sensor module 700.

[0086] The image sensor module 700 may include an image sensor 710, a sensor housing 730, and a sensor substrate 720, and may also include an infrared cutoff filter. The infrared cutoff filter may be mounted on the sensor housing 730. The infrared cutoff filter can block light in the infrared region.

[0087] The sensor substrate 720 can be connected to the sensor housing 730, and the image sensor 710 can be disposed on the substrate 800.

[0088] Light passing through the second lens module 220 can be received by the image sensor 710 of the image sensor module 700.

[0089] The camera module 1000 in this exemplary embodiment may further include a housing 120. The housing 120 may be coupled to the housing 110 to cover the upper portion of the housing 110. The housing 120 may have an opening, and the first lens module 210 may be disposed in the opening.

[0090] In the example, at least a portion of the first lens module 210 may protrude outward from the housing 110.

[0091] Reference Figures 4 to 6 The reflection module 300 may include a reflection member 310, a bracket 320, and a guide member 330.

[0092] The reflecting member 310 may include a reflective surface for reflecting light passing through the first lens module 210. As a non-limiting example, the reflecting member 310 may be implemented as a prism or a mirror.

[0093] When the reflecting member 310 is implemented as a prism, the reflecting member 310 may have a shape obtained by bisecting a cuboid or cube in a diagonal direction. The prism may include an incident surface through which light is incident, a reflecting surface for reflecting light passing through the incident surface, and an exiting surface through which light reflected from the reflecting surface is emitted.

[0094] The reflective member 310 can be mounted on the bracket 320. The first lens module 210 can be disposed in front of the reflective member 310. In an exemplary embodiment, the first lens module 210 can be mounted on the bracket 320.

[0095] The bracket 320 is rotatably disposed in the guide member 330. In addition, the guide member 330 is rotatably disposed in the housing 110.

[0096] The guide member 330 is rotatable about a first optical axis (X-axis). For example, the guide member 330 is rotatable relative to the housing 110 about the first optical axis (X-axis). In this example, the first lens module 210 and the bracket 320 may also rotate together with the guide member 330. In this example, the first optical axis (X-axis) may also be referred to as the first rotation axis RA1 (see [reference]). Figure 7 ).

[0097] The bracket 320 can rotate about a first axis (Y-axis) perpendicular to both the first optical axis (X-axis) and the second optical axis (Z-axis). For example, the bracket 320 can rotate about the first axis (Y-axis) relative to the guide member 330. In this example, the first lens module 210 can rotate together with the bracket 320. In this example, the first axis (Y-axis) may also be referred to as the second rotation axis RA2 (see [reference]). Figure 7 ).

[0098] The camera module 1000 in this exemplary embodiment may include a first drive unit 400 to control the rotation of the bracket 320. The first drive unit 400 may include a first magnet 410 and a first coil 420. The bracket 320 can rotate about a first axis (Y-axis) via the first drive unit 400. A first lens module 210 may be disposed on the bracket 320, and therefore the first lens module 210 can also rotate with the bracket 320.

[0099] The first magnet 410 can be mounted on the bracket 320. In an exemplary embodiment, the first magnet 410 can be mounted on one surface of the bracket 320.

[0100] The first magnet 410 can be magnetized so that a surface (e.g., the surface facing the first coil 420) has both a north pole (N pole) and a south pole (S pole). In an exemplary embodiment, the surface of the first magnet 410 facing the first coil 420 can be magnetized to have an N pole, a neutral region, and an S pole sequentially along a first optical axis (X-axis).

[0101] In the example, the first magnet 410 may have a shape that extends along the first axis (Y-axis). For example, the length of the first magnet 410 in the first axis (Y-axis) direction may be greater than its length in the first optical axis (X-axis) direction.

[0102] The first coil 420 may face the first magnet 410. In an exemplary embodiment, the first coil 420 may be configured to face the first magnet 410 in the direction of the second optical axis (Z axis).

[0103] In the example, the first coil 420 may have a shape that extends along the first axis (Y-axis). For example, the length of the first coil 420 in the first axis (Y-axis) direction may be greater than its length in the first optical axis (X-axis) direction.

[0104] The first coil 420 can be disposed on the substrate 800, and the substrate 800 can be mounted in the housing 110 so that the first magnet 410 and the first coil 420 face each other in the direction of the second optical axis (Z axis).

[0105] A through hole passing through the housing 110 in the direction of the second optical axis (Z axis) can be formed in the housing 110, and the first coil 420 can be disposed in the through hole to directly face the first magnet 410.

[0106] When optical image stabilization (OIS) is implemented, the first magnet 410 may correspond to a movable member mounted on the bracket 320 to rotate together with the bracket 320, and the first coil 420 may correspond to a fixed member fixed to the substrate 800.

[0107] When power is applied to the first drive unit 400, the first drive unit 400 can generate the driving force required to rotate the bracket 320 about the first axis (Y-axis). The first drive unit 400 can generate driving force in the direction of the first optical axis (X-axis).

[0108] Reference Figure 5 and Figure 6 The first ball component B1 can be disposed between the support 320 and the guide component 330. The first ball component B1 can be disposed between the support 320 and the guide component 330 to form the rotation axis of the support 320.

[0109] The first ball component B1 may include a plurality of balls spaced apart from each other in the direction of the first axis (Y-axis).

[0110] When viewed in the direction of the first axis (Y-axis), a portion of the reflective surface of the reflective member 310 may overlap with the first spherical member B1.

[0111] An imaginary line connecting the plurality of spheres of the first sphere member B1 to each other in the direction of the first axis (Y-axis) can pass through the reflective surface of the reflective member 310.

[0112] Reference Figure 6 The attractive force can act between the support 320 and the guide member 330. In an exemplary embodiment, the first traction magnet 440 may be disposed on one of the support 320 and the guide member 330, and the first traction yoke 450 may be disposed on the other of the support 320 and the guide member 330. However, the configuration is not limited thereto, and the first traction magnet 440 may be disposed on both the support 320 and the guide member 330.

[0113] One surface of the first traction magnet 440 (e.g., the surface facing the first traction yoke 450) can be magnetized to have an N pole, a neutral region, and an S pole disposed in the direction of the first optical axis (X-axis).

[0114] The first traction magnet 440 and the first traction yoke 450 can face each other in the direction of the second optical axis (Z axis).

[0115] The first traction magnet 440 and the first traction yoke 450 can generate an attractive force between each other. For example, the first traction yoke 450 can be made of a magnetic material. The attractive force can act between the first traction magnet 440 and the first traction yoke 450 in the direction of the second optical axis (Z-axis).

[0116] By means of the attraction force acting between the first traction magnet 440 and the first traction yoke 450, the first ball member B1 can maintain contact with each of the bracket 320 and the guide member 330.

[0117] The first guide groove g1 can be respectively disposed on the surfaces of the bracket 320 and the guide member 330 facing each other (e.g., the surfaces facing each other in the direction of the second optical axis (Z axis)).

[0118] The first ball component B1 can be disposed between the first guide groove g1 of the bracket 320 and the first guide groove g1 of the guide component 330 to form the rotation axis of the bracket 320.

[0119] The camera module 1000 in this exemplary embodiment may include a second drive unit 500 to control the rotation of the reflection module 300. The second drive unit 500 may include a second magnet 510 and a second coil 520. The guide member 330 can rotate relative to the housing 110 about a first optical axis (X-axis) via the second drive unit 500. A bracket 320 and a first lens module 210 may be disposed on the guide member 330, and therefore the bracket 320 and the first lens module 210 can also rotate together with the guide member 330.

[0120] The second magnet 510 can be mounted on the guide member 330. For example, the second magnet 510 can be disposed on a side surface of the guide member 330, facing the second coil 520. The side surface of the guide member 330 can refer to its surface facing the housing 110 in the first axis (Y-axis) direction. For example, the side surface of the guide member 330 can refer to the outer surface of the guide member 330 perpendicular to the first axis (Y-axis).

[0121] The second magnet 510 may include two magnets respectively disposed on two side surfaces of the guide member 330. The two magnets may be spaced apart from each other in the direction of the first axis (Y-axis).

[0122] Each of the two magnets included in the second magnet 510 can be magnetized such that a surface (e.g., the surface facing the second coil 520) has both an N pole and a S pole. In an exemplary embodiment, a surface of the second magnet 510 facing the second coil 520 can be magnetized to have an N pole, a neutral region, and an S pole arranged sequentially along the second optical axis (Z-axis).

[0123] The second magnet 510 may have a shape that extends in the direction of the first optical axis (X-axis). For example, the length of the second magnet 510 in the direction of the first optical axis (X-axis) may be greater than the length in the direction of the second optical axis (Z-axis).

[0124] The second coil 520 may face the second magnet 510. In an exemplary embodiment, the second coil 520 may be configured to face the second magnet 510 in the direction of the first axis (Y-axis).

[0125] The second coil 520 may have a shape that extends in the direction of the first optical axis (X-axis). For example, the length of the second coil 520 in the direction of the first optical axis (X-axis) may be greater than its length in the direction of the second optical axis (Z-axis).

[0126] The second coil 520 can be disposed on the substrate 800, and the substrate 800 can be mounted in the housing 110 so that the second magnet 510 and the second coil 520 face each other in the first axis (Y axis) direction.

[0127] A through hole passing through the housing 110 in the first axis (Y-axis) direction can be formed in the housing 110, and the second coil 520 can be disposed in the through hole to directly face the second magnet 510.

[0128] The second coil 520 may include two coils. The two coils may be spaced apart from each other in the direction of the first axis (Y-axis).

[0129] When optical image stabilization (OIS) is implemented, the second magnet 510 may correspond to a movable member mounted on the guide member 330 to rotate together with the guide member 330, and the second coil 520 may correspond to a fixed member fixed to the substrate 800.

[0130] When power is applied to the second drive unit 500, the second drive unit 500 can generate the driving force required to rotate the guide member 330 about the first optical axis (X axis).

[0131] Reference Figure 5 and Figure 6 The second ball component B2 can be disposed between the guide component 330 and the housing 110.

[0132] The second spherical component B2 may include a central sphere BC forming the rotation axis of the guide component 330 and a plurality of guide spheres BG supporting the rotation of the guide component 330. The guide component 330 may be supported at three points by the central sphere BC and the plurality of guide spheres BG.

[0133] An imaginary line extending along the first optical axis (X-axis) of the first lens module 210 can pass through the central sphere BC.

[0134] An attractive force can act between the guide member 330 and the housing 110. In an exemplary embodiment, the second traction magnet 540 can be disposed on the lower surface of the guide member 330 (e.g., the surface facing the housing 110). Additionally, the second traction yoke 550 can be disposed facing the second traction magnet 540 in the direction of the first optical axis (X-axis). In an exemplary embodiment, the second traction yoke 550 can be disposed within the housing 110.

[0135] The second traction magnet 540 and the second traction yoke 550 can generate an attractive force between each other. In this example, the second traction yoke 550 can be made of a magnetic material. The attractive force can act between the second traction magnet 540 and the second traction yoke 550 in the direction of the first optical axis (X-axis).

[0136] By means of the attraction force acting between the second traction magnet 540 and the second traction yoke 550, the second ball member B2 can maintain contact with each of the guide member 330 and the housing 110.

[0137] The second guide groove g2 and the third guide groove g3 can each be disposed on the surfaces of the guide member 330 and the housing 110 that face each other (e.g., the surfaces that face each other in the direction of the first optical axis (X-axis)). The center ball BC can be disposed in the second guide groove g2, and a plurality of guide balls BG can be disposed in the third guide groove g3.

[0138] In an exemplary embodiment, the central ball BC can make three-point contact with the second guide groove g2 of the guide member 330 and the second guide groove g2 of the housing 110. The central ball BC can be disposed between the second guide groove g2 of the guide member 330 and the second guide groove g2 of the housing 110 to form a first rotation axis RA1 of the guide member 330.

[0139] In an exemplary embodiment, each of the plurality of guide balls BG may make single-point contact with the third guide groove g3 of the guide member 330 and with the third guide groove g3 of the housing 110.

[0140] In another exemplary embodiment, each of the plurality of guide balls BG may have two-point contact with the third guide groove g3 of the guide member 330 and one-point contact with the third guide groove g3 of the housing 110. However, the configuration is not limited to this, and in the example, each of the plurality of guide balls BG may have a single-point contact with the third guide groove g3 of the guide member 330 and two-point contact with the third guide groove g3 of the housing 110.

[0141] In the example, refer to Figure 2 The reflective module 300 may further include a stop 350. The stop 350 may be coupled to the guide member 330 to cover at least a portion of the bracket 320. For example, the stop 350 may cover at least a portion of the upper surface of the bracket 320. The stop 350 and the bracket 320 may be spaced apart from each other in the direction of the first optical axis (X-axis).

[0142] The stop 350 can be spaced apart from the bracket 320, and thus the stop 350 can prevent the bracket 320 from separating from the guide member 330 due to external impacts, etc., without interfering with the rotation of the bracket 320.

[0143] A resilient buffer member can be attached to the stop 350. The buffer member can be disposed on at least one surface of the stop 350 facing the support 320.

[0144] In the following, the configuration for sensing the position of the reflection module 300 in this exemplary embodiment will be described in detail with reference to the accompanying drawings.

[0145] Figure 7 It is along Figure 4 The cross-sectional perspective view of the reflection module 300 shown is taken along line I-I'. Figure 8 It is along Figure 4 The cross-sectional view of the reflective module 300 shown is taken along line II-II'. Figure 9 yes Figure 4 The front view of the reflection module 300 shown. Figure 10 This is a schematic view illustrating the driving of the reflection module 300 according to a first exemplary embodiment. Figure 11 It is shown Figure 10 A comparative example view of the reflection module 300 shown. Figure 12 It is a graph showing the change in magnetic field strength based on the rotation angle sensing of the reflection module 300.

[0146] Reference Figures 7 to 10 According to an exemplary embodiment, the camera module 1000 may include a first position sensing unit 470 for detecting the position of the bracket 320. The first position sensing unit 470 may include a first sensing magnet 471 and a first position sensor 472. Furthermore, the first position sensing unit 470 may also include a controller for performing summation or other operations on its sensing results, and is not limited thereto.

[0147] When the bracket 320 rotates around the first axis (Y-axis) (i.e., the second rotation axis RA2), the first position sensing unit 470 can detect the position of the bracket 320.

[0148] The first sensing magnet 471 can be disposed on one surface of the support 320. Additionally, the first sensing magnet 471 can be spaced apart from the first magnet 410. For example, the first sensing magnet 471 can be spaced apart from the first magnet 410 in the direction of the first optical axis (X-axis).

[0149] In this example, the camera module 1000 in this exemplary embodiment may include at least a pair of first sensing magnets 471a and 471b. The pair of first sensing magnets 471a and 471b may be disposed on a surface of the bracket 320 and may be spaced apart from each other in a direction parallel to the first optical axis (X-axis) (i.e., the first rotation axis RA1). The pair of first sensing magnets 471a and 471b may be symmetrically arranged relative to the first magnet 410.

[0150] In this exemplary embodiment, each of the first magnet 410 and the first sensing magnet 471 may have two polarities arranged in a direction parallel to the first rotation axis RA1. Furthermore, the areas of the first magnet 410 and the first sensing magnet 471 facing each other may have the same polarity. That is, referring to... Figure 7 When the first magnet 410 has N poles and S poles arranged sequentially along the vertical direction, the first sensing magnet 471a disposed above the first magnet 410 may have S poles and N poles arranged sequentially along the vertical direction. Additionally, the first sensing magnet 471b disposed below the first magnet 410 may have S poles and N poles arranged sequentially along the vertical direction.

[0151] When the polarity relationship between the first magnet 410 and the first sensing magnet 471 is set as described above, the sensing error caused by Hall coupling can be reduced.

[0152] In the example, the first magnet 410 may have a structure in which multiple monopole magnets are combined with each other. For example, the first magnet 410 may have a combination structure in which magnets with N poles and magnets with S poles are arranged sequentially along the vertical direction. In this way, when the first magnet 410 includes a combination of multiple monopole magnets, the neutral region between the N pole and the S pole can be minimized, thereby improving the driving force and driving accuracy.

[0153] Furthermore, the first sensing magnet 471 may have a structure in which multiple monopole magnets are combined with each other. For example, the first sensing magnet 471 may have a combination structure in which magnets with S poles and magnets with N poles are arranged sequentially along the vertical direction. In this way, when the first sensing magnet 471 includes a combination of multiple monopole magnets, the neutral region between the N pole and the S pole can be minimized, thereby improving sensing accuracy.

[0154] The camera module 1000 according to an exemplary embodiment may include a separate first sensing magnet 471 to sense the position of the bracket 320, and thus the size of the first coil 420 facing the first magnet 410 can be sufficiently increased. Therefore, the magnitude of the driving force of the first driving unit 400 can be increased.

[0155] The first position sensor 472 can be positioned at a location that allows detection of position changes in the first sensing magnet 471. In this example, the first position sensor 472 can be a Hall sensor.

[0156] The first position sensor 472 in this exemplary embodiment may include at least a pair of first position sensors 472a and 472b, and the pair of first position sensors 472a and 472b may be disposed on one surface of the housing 110. For example, the first position sensors 472a and 472b may be disposed on one surface of the housing 110 facing the bracket 320. Therefore, at least a pair of first position sensors 472a and 472b may be configured to face at least a pair of first sensing magnets 471a and 471b, respectively.

[0157] In addition, at least one pair of first position sensors 472a and 472b can be arranged symmetrically with respect to the center of the first coil 420.

[0158] In detail, each of the first position sensors 472a and 472b can be arranged in a direction parallel to the first optical axis (X-axis) (i.e., the first rotation axis RA1). Furthermore, each of the first position sensors 472a and 472b can be arranged to be spaced apart from the center of the first coil 420 in a direction parallel to the first optical axis (X-axis) (i.e., the first rotation axis RA1).

[0159] Reference Figure 8 A pair of first position sensors 472a and 472b can be symmetrically arranged with respect to an imaginary center line CL extending along the second optical axis (Z-axis). Furthermore, each of the first position sensors 472a and 472b can be spaced apart from the imaginary center line CL in a direction parallel to the first rotation axis RA1 (i.e., the X-axis direction). Additionally, the corresponding shortest distances d1 and d2 between the first position sensors 472a and 472b and the imaginary center line CL can be equal to each other. Here, "equal" can be defined as including not only being exactly the same in a strict sense, but also the concept of containing substantially the same values. "Substantially the same" refers to a state including manufacturing tolerances, positional deviations, or measurement errors that arise during the manufacturing process.

[0160] In the example, when an imaginary plane perpendicular to the first rotation axis RA1 and including the second rotation axis RA2 is defined, the number of first position sensors (e.g., 472a) on one side of the imaginary plane among at least one pair of first position sensors 472a and 472b can be equal to the number of first position sensors (e.g., 472b) on the other side of the imaginary plane. That is, although this exemplary embodiment assumes an example in which two first position sensors 472a and 472b are provided, additional first position sensors can also be provided. Even in such an example, additional first position sensors can be provided in pairs, the same number of sensors can be provided in the upper and lower regions, and the sensors can be positioned symmetrically.

[0161] Reference Figures 8 to 10 Based on an imaginary plane, the distance d1 between the first position sensor 472a on one side facing the imaginary plane and the imaginary plane can be equal to the distance d2 between the first position sensor 472b on the other side facing the imaginary plane and the imaginary plane. Here, "equal" can be defined as a concept that includes not only being exactly the same in a strict sense, but also being substantially the same. "Substantially the same" refers to the state including manufacturing tolerances, positional deviations, or measurement errors that occur during the manufacturing process.

[0162] When power is applied to the first coil 420, Hall coupling may occur due to the magnetic field of the first coil 420, and therefore the position of the bracket 320 detected by the first position sensor 472 may be inaccurate. However, the camera module 1000 according to an exemplary embodiment of the present disclosure may include the first position sensor 472 configured to be spaced apart from the first coil 420, thereby improving the accuracy of sensing the position of the bracket 320.

[0163] Specifically, the camera module 1000 in this exemplary embodiment may include a pair of first position sensors 472a and 472b arranged to be spaced apart from each other in a direction parallel to the direction of the first rotation axis RA1. This configuration enables correction of misaligned position sensing relative to the second rotation axis RA2, thereby improving the accuracy and linearity of position sensing.

[0164] In this example, the first position sensing unit 470 in this exemplary embodiment may include a first sensing magnet 471 and a first position sensor 472, and may also include a controller capable of calculating the results sensed from these components. For example, the first position sensing unit 470 may sum the results sensed from the respective first position sensors 472a and 472b using the controller. As a result, accurate sensing of the position of the bracket 320 can be achieved, and sensing linearity can be improved.

[0165] Reference Figures 4 to 6 According to an exemplary embodiment, the camera module 1000 may include a second position sensing unit 570 for detecting the position of the guide member 330. The second position sensing unit 570 may include a second sensing magnet 571 and a second position sensor 572.

[0166] When the guide member 330 rotates around the first optical axis (X-axis) as the rotation axis, the position of the guide member 330 can be detected by the second position sensing unit 570.

[0167] The second sensing magnet 571 may be disposed on a surface (e.g., a side surface) of the guide member 330. Additionally, the second sensing magnet 571 may be disposed spaced apart from the second magnet 510.

[0168] The second sensing magnet 571 can be magnetized so that a surface has both an N pole and a S pole. In an exemplary embodiment, a surface of the second sensing magnet 571 may have an N pole, a neutral region, and an S pole arranged sequentially along the second optical axis (Z-axis).

[0169] According to an exemplary embodiment, the camera module 1000 may include a separate second sensing magnet 571 for sensing the position of the guiding member 330, thereby significantly increasing the size of the second coil 520 facing the second magnet 510. Therefore, the magnitude of the driving force of the second driving unit 500 can be increased.

[0170] The second position sensor 572 may be positioned at a location that allows it to detect positional changes of the second sensing magnet 571. In an exemplary embodiment, the second sensing magnet 571 and the second position sensor 572 may be positioned facing each other in the direction of a first axis (Y-axis).

[0171] The second position sensor 572 can be configured to be spaced apart from the second coil 520. The second position sensor 572 can be a Hall sensor.

[0172] When power is applied to the second coil 520, Hall coupling may occur due to the magnetic field of the second coil 520, and therefore the position of the guide member 330 detected by the second position sensor 572 may be inaccurate. However, the camera module 1000 according to the exemplary embodiment may include a second position sensor 572 configured to be spaced apart from the second coil 520, thereby improving the accuracy of sensing the position of the guide member 330.

[0173] In the example, a through hole can be formed in the housing 110 in the first axis (Y-axis) direction, and a substrate 800 covering the through hole can be disposed on a side surface of the housing 110. Additionally, a second position sensor 572 can be disposed on the substrate 800.

[0174] In the following text, reference will be made to Figures 10 to 12 The effects of arranging the first position sensor 472 as described in this exemplary embodiment are explained.

[0175] Reference Figure 10 and Figure 11 To implement optical image stabilization (OIS) operation, the bracket 320 can be tilted around a rotation axis formed by the first ball member B1. In this example, considering the range of drive for the tilt rotation, it may be advantageous to position the first magnet 410 and the first coil 420 on the centerline CL of the rotation axis. Therefore, the first position sensor 472 can be positioned spaced apart from the centerline CL to face the first sensing magnet 471.

[0176] In this example, such as Figure 11 As shown, when only one first position sensor 472a is set, sensing errors may occur due to misalignment with the center line CL. That is, depending on the angle of tilt rotation performed by the bracket 320, a nonlinear region may appear in the magnetic field strength measured by the first position sensor 472a.

[0177] In contrast, as in the camera module 1000 according to an exemplary embodiment, when a pair of first position sensors 472a and 472b are symmetrically arranged with respect to the center line CL, linearity can be ensured by summing the sensing results from the two first position sensors 472a and 472b.

[0178] Table 1

[0179] Table 2

[0180] Table 1 shows the data based on... Figure 10 and Figure 11 The rotation angle in the example shown represents the magnetic field strength. Table 2 illustrates the sensing sensitivity and linearity for each example, based on the results in Table 1. The linearity in Table 2 represents the difference from the ideal graph, and it can be understood that the closer the value is to zero, the higher the linearity.

[0181] Reference Figure 12 And Tables 1 and 2 above, in such Figure 11 In the example shown where position sensing is performed using a single first position sensor 472a, it can be confirmed that the error relative to the ideal pattern (indicated by the dashed line) increases with the increase of the travel angle in the negative direction.

[0182] In comparison, such as Figure 10 As shown, when a pair of first position sensors 472a and 472b are set and their sensing results are summed, it can be confirmed that the detection sensitivity and linearity are significantly improved.

[0183] Figure 13 This is a perspective view of a reflection module 300' according to another exemplary embodiment. Figure 14 yes Figure 13 The front view of the reflection module 300' shown.

[0184] when Figure 13 and Figure 4In comparison, the reflection module 300' in this exemplary embodiment does not include the first sensing magnet 471, and the first position sensors 472a and 472b can be positioned differently. Therefore, in describing this exemplary embodiment, the description focuses only on the differences from the first exemplary embodiment, namely, whether the first sensing magnet 471 is included and the arrangement of the first position sensors 472a and 472b, and other configurations can be applied in the same manner as described in the first exemplary embodiment.

[0185] Reference Figure 13 and Figure 14 In this exemplary embodiment, the first position sensing unit 470 of the reflection module 300' may include only first position sensors 472a and 472b, and may not include a separate first sensing magnet. A portion of the first magnet 410 in this exemplary embodiment can be used to generate driving force, and another portion of the first magnet 410 can be used for position sensing.

[0186] In this example, at least one pair of first position sensors 472a and 472b in this exemplary embodiment may be arranged in a direction parallel to the second rotation axis RA2.

[0187] Additionally, when taking an imaginary plane that is perpendicular to the first rotation axis RA1 (i.e., the first optical axis (X-axis)) and includes the second rotation axis RA2 (i.e., the first axis (Y-axis)) as an example, the imaginary plane can pass through at least one pair of first position sensors 472a and 472b.

[0188] In other words, in this exemplary embodiment, when a pair of first position sensors 472a and 472b are projected in the direction of the second optical axis (Z-axis), the first position sensors 472a and 472b can be disposed on the second rotation axis RA2. Therefore, the sensing error of the first position sensors 472a and 472b caused by the rotation of the bracket 320 can be minimized.

[0189] Figure 15 This is a perspective view showing an example of a second lens module 220 being separated from a camera module 1000 according to an exemplary embodiment. Figure 16 It is shown Figure 15 A view of the bottom surface of the second lens module 220 shown.

[0190] Reference Figure 15 and Figure 16 The second lens module 220 can be positioned between the reflection module 300 and the image sensor module 700.

[0191] The second lens module 220 can move in the direction of the second optical axis (Z-axis) to perform focus adjustment.

[0192] In an exemplary embodiment, the second lens module 220 may include a second lens barrel 221 and a support portion 222. Multiple lenses may be disposed in the second lens barrel 221, and the second lens barrel 221 may be connected to the support portion 222.

[0193] The camera module 1000 may include a third drive unit 600, which moves the second lens module 220 in the direction of the second optical axis (Z axis).

[0194] The third drive unit 600 may include a third magnet 610 and a third coil 620. The third magnet 610 and the third coil 620 may be arranged to face each other in the direction of the first axis (Y-axis).

[0195] The third magnet 610 can be mounted on the second lens module 220. The third magnet 610 can be disposed on a side surface of the second lens module 220 (e.g., a side surface of the support portion 222).

[0196] In an exemplary embodiment, the second lens module 220 may include a first side surface and a second side surface spaced apart from each other in the direction of the first axis (Y-axis). Additionally, a third magnet 610 may be disposed on one side surface of the second lens module 220.

[0197] The third magnet 610 can be magnetized so that a surface (e.g., the surface facing the third coil 620) has both an N pole and a S pole. For example, a surface of the third magnet 610 facing the third coil 620 can have an N pole, a neutral region, and an S pole arranged sequentially along the second optical axis (Z-axis).

[0198] The third coil 620 may face the third magnet 610. For example, the third coil 620 may be configured to face the third magnet 610 in the direction of the first axis (Y-axis).

[0199] The third coil 620 can be disposed on the substrate 800, and the substrate 800 can be mounted on the housing 110 so that the third magnet 610 and the third coil 620 face each other in the first axis (Y-axis) direction.

[0200] A through hole can be formed in the housing 110, and the third coil 620 disposed on the substrate 800 can directly face the third magnet 610 through the through hole.

[0201] During the optical zoom operation or autofocus (AF) operation, the third magnet 610 may correspond to a movable member mounted on the second lens module 220 to move together with the second lens module 220 in the direction of the second optical axis (Z axis), and the third coil 620 may correspond to a fixed member fixed to the substrate 800.

[0202] When power is applied to the third coil 620, the second lens module 220 can move in the direction of the second optical axis (Z axis) by the electromagnetic force generated between the third magnet 610 and the third coil 620.

[0203] The third spherical component B3 may be disposed between the second lens module 220 and the housing 110, and the second lens module 220 may be guided by the third spherical component B3 to move in the direction of the second optical axis (Z-axis). The third spherical component B3 may include a plurality of spheres.

[0204] The third traction magnet 640 may be disposed on the lower surface of the second lens module 220, and the third traction yoke 650 may be disposed on the inner bottom surface of the housing 110. However, the configuration is not limited to this, and the third traction magnet 640 may also be disposed on both the second lens module 220 and the housing 110.

[0205] The third traction magnet 640 can be positioned closer to one side surface of the second lens module 220. That is, the third traction magnet 640 can be positioned closer to the first side surface of the second lens module 220 than to its second side surface. Furthermore, the third traction magnet 640 can be positioned between one side surface of the second lens module 220 and the second optical axis (Z-axis).

[0206] The third traction magnet 640 and the third traction yoke 650 can be arranged to face each other in the direction of the first optical axis (X-axis).

[0207] The third traction magnet 640 and the third traction yoke 650 can generate an attractive force between each other. In the example, the attractive force can act between the third traction magnet 640 and the third traction yoke 650 in the direction of the first optical axis (X-axis).

[0208] The third ball component B3 can contact each of the second lens module 220 and the housing 110 through the attraction force acting between the third traction magnet 640 and the third traction yoke 650.

[0209] Among the plurality of balls included in the third ball member B3, some of the balls may be configured to be closer to the first side surface of the second lens module 220 than the second side surface of the second lens module 220, and the remaining balls may be configured to be closer to the second side surface of the second lens module 220 than the first side surface of the second lens module 220.

[0210] The number of spheres disposed between the first side surface of the second lens module 220 and the second optical axis (Z-axis) can be greater than the number of spheres disposed between the second side surface of the second lens module 220 and the second optical axis (Z-axis).

[0211] In a non-limiting exemplary embodiment, the third spherical member B3 may include three spheres. Two of the three spheres may be disposed between the first side surface of the second lens module 220 and the second optical axis (Z-axis), and the remaining sphere may be disposed between the second side surface of the second lens module 220 and the second optical axis (Z-axis).

[0212] The two spheres positioned between the first side surface of the second lens module 220 and the second optical axis (Z-axis) can be spaced apart from each other in the direction of the second optical axis (Z-axis).

[0213] The surfaces of the second lens module 220 and the housing 110 that face each other may each have a fourth guide groove g4 and a fifth guide groove g5. For example, the fourth guide groove g4 may be provided on a first side of each of the surfaces of the second lens module 220 and the housing 110 that face each other, and the fifth guide groove g5 may be provided on a second side of these surfaces.

[0214] The fourth guide groove g4 and the fifth guide groove g5 can be spaced apart from each other in the direction of the first axis (Y-axis). The fourth guide groove g4 and the fifth guide groove g5 can extend in a direction parallel to the second optical axis (Z-axis).

[0215] Among the plurality of balls included in the third ball component B3, some of the balls may be disposed in the fourth guide groove g4, and the remaining balls may be disposed in the fifth guide groove g5.

[0216] The number of contact points between some of the balls and the fourth guide groove g4 can be greater than the number of contact points between the remaining balls and the fifth guide groove g5.

[0217] The fourth guide groove g4 can be positioned closer to a side surface of the second lens module 220 than the fifth guide groove g5.

[0218] The third traction magnet 640 can be configured to be closer to the fourth guide groove g4 than the fifth guide groove g5.

[0219] In an exemplary embodiment, the camera module 1000 can detect the position of the second lens module 220. Therefore, a third position sensor 672 can be provided. The third position sensor 672 can be configured to face the third magnet 610 of the third drive unit 600 (e.g., facing the third magnet 610 in the first axis (Y-axis) direction).

[0220] Therefore, when the second lens module 220 moves in the direction of the second optical axis (Z-axis), the position of the second lens module 220 can be detected using the third position sensor 672. In this example, the third position sensor 672 may be a Hall sensor.

[0221] In the following text, reference will be made to Figures 17 to 22 A camera module 2000 according to another exemplary embodiment is described.

[0222] The camera module 2000 in this exemplary embodiment differs from the camera module 1000 described above in that the rotation axis of the guide member 330' that enables optical image stabilization (OIS) operation is different. Therefore, the shape of the bracket 320', the arrangement of the first magnet 410' and the first coil 420', the configuration of the second ball member B2', the shape of the housing 110', etc., may differ from the corresponding structure of the camera module 1000 described above. Therefore, in describing the camera module 2000 in this exemplary embodiment, the description focuses on these differences, and the remaining configurations can be adopted from the relevant configurations of the camera module 1000 described above.

[0223] In describing this exemplary embodiment, the X-axis, Y-axis and Z-axis in the figures can be defined as the third axis, the second axis and the first axis, respectively.

[0224] Figure 17 This is an exploded perspective view of a camera module 2000 according to another exemplary embodiment. Figure 18 It's an observation from another perspective. Figure 17 An exploded perspective view of the camera module 2000 shown. Figure 19 yes Figure 17 A perspective view of the housing 110' shown. Figure 20 This is a view showing the XY cross section of a camera module 2000 according to another exemplary embodiment.

[0225] Reference Figure 17 and 20 The bracket 320', which is provided with the first lens module 210 and the reflective member 310, can be rotatably supported by the guide member 330'.

[0226] In an exemplary embodiment, the bracket 320' may be rotatably disposed relative to the guide member 330' about a second axis (Y-axis). Therefore, a plurality of first ball members B1 supporting the bracket 320' to rotate about the second axis (Y-axis) may be disposed between the bracket 320' and the guide member 330'.

[0227] The first lens module 210 and the reflective member 310 can be disposed in the bracket 320' and thus can rotate together with the bracket 320' about the second axis (Y-axis).

[0228] The guide member 330' can be rotatably supported by the housing 110'.

[0229] In an exemplary embodiment, the guide member 330' may be rotatably disposed relative to the housing 110' about a first axis (Z-axis). Therefore, a second ball member B2' that supports the rotation of the guide member 330' about the first axis (Z-axis) may be disposed between the guide member 330' and the housing 110'.

[0230] The bracket 320' can be supported by the guide member 330', and therefore, when the guide member 330' rotates, the bracket 320' can rotate together with the guide member 330' about the first axis (Z-axis). Therefore, the first lens module 210 and the reflective member 310 disposed in the bracket 320' can also rotate together about the first axis (Z-axis).

[0231] The reflection module 300 may include a drive unit that generates driving force to rotate the reflection module 300 about a first axis (Z-axis) and / or a second axis (Y-axis).

[0232] The drive unit may include a magnet and a coil, and may include a first drive unit 400' that provides drive force to the bracket 320' and a second drive unit 500' that provides drive force to the guide member 330'. In an exemplary embodiment, the first drive unit 400' is rotatable about a second axis (Y-axis) to rotate the bracket 320', and the second drive unit 500' is rotatable about a first axis (Z-axis) to rotate the guide member 330'.

[0233] In an exemplary embodiment, the driving force that causes the reflection module 300 to rotate about a first axis (Z-axis) and / or a second axis (Y-axis) may be an electromagnetic force generated between a magnet and a coil.

[0234] The first driving unit 400' may include a first magnet 410' and a first coil 420'.

[0235] The first magnet 410' can be disposed on the bottom surface of the bracket 320', and the first coil 420' can be disposed on the bottom surface of the housing 110' facing the bottom surface of the bracket 320'.

[0236] The rear yoke 323 can be disposed between the first magnet 410' and the support 320'. The rear yoke 323 can be part of the support 320' and can be exposed through the bottom surface of the support 320'. The first magnet 410' can be disposed on the rear yoke 323. The rear yoke 323 can concentrate the magnetic flux of the first magnet 410' and prevent magnetic field leakage.

[0237] The first coil 420' can be mounted on the substrate 800 and disposed on the bottom surface of the housing 110', and can be exposed to the internal space of the housing 110' through a through hole formed in the bottom surface of the housing 110'.

[0238] The guide member 330' may include an opening 331 that opens in the direction of the third axis (X-axis), and the bottom surface of the bracket 320' may be disposed in the opening 331 and supported by the guide member 330'.

[0239] Therefore, the bottom surface of the bracket 320' can directly face the bottom surface of the housing 110', and the first magnet 410' disposed on the bottom surface of the bracket 320' and the first coil 420' disposed on the bottom surface of the housing 110' can thus face each other in the third axis (X-axis) direction.

[0240] The first magnet 410' may have different polarities magnetized sequentially along the direction of rotation. In the example, the surface of the first magnet 410' facing the first coil 420' may have an N pole (or S pole), a neutral region, and an S pole (or N pole) sequentially arranged along the direction of rotation of the support 320' (e.g., the first axis (Z-axis) direction). However, the configuration is not limited to this, and the first magnet 410' may also include a combination of a pair of monopole magnets with different polarities. In this way, when the first magnet 410' includes a combination of a pair of monopole magnets, the neutral region can be eliminated, thereby enhancing the driving force.

[0241] When power is applied to the first coil 420', the first coil 420' can interact with the first magnet 410' to generate a driving force in a direction perpendicular to the direction in which the magnet and the coil face each other (e.g., in the direction of the first axis (Z-axis)), and the support 320' can rotate about the second axis (Y-axis) by the resultant force of the driving force.

[0242] In this example, the camera module 2000 in this exemplary embodiment may include a first position sensing unit for detecting the rotation of the bracket 320'. The first position sensing unit may include a plurality of first sensing magnets 471a and 471b and a plurality of first position sensors 472a and 472b. The plurality of first sensing magnets 471a and 471b are disposed on the surface of the bracket 320' facing the housing 110' in the first axis (Z-axis) direction, and the plurality of first position sensors 472a and 472b are disposed on the housing 110'. The plurality of first sensing magnets 471a and 471b and the plurality of first position sensors 472a and 472b may be configured to face each other.

[0243] Multiple first sensing magnets 471a and 471b can be aligned along a third axis (X-axis) and arranged symmetrically with respect to a second axis (Y-axis). By symmetrically arranging multiple first sensing magnets 471a and 471b with respect to the second axis (Y-axis) and detecting changes in magnetic flux by multiple first position sensors 472a and 472b, the rotational drive of the bracket 320' about the second axis (Y-axis) can be accurately detected.

[0244] Reference Figure 17 , and 18 and Figure 20 The first sensing magnets 471a and 471b may be disposed on the protrusion 322 included in the bracket 320'. The protrusion 322 refers to the portion extending from the bracket 320' toward the guide member 330' in the first axis (Z-axis) direction, and may be disposed through the recess 332 formed in the guide member 330'.

[0245] In an exemplary embodiment, the first position sensors 472a and 472b may be disposed on the substrate 800 and may face the first sensing magnets 471a and 471b through through holes formed in the housing 110' in the first axis (Z axis) direction.

[0246] The second drive unit 500' may include a second magnet 510' and a second coil 520.

[0247] In the example, the second magnet 510' may be disposed on the side surface of the guide member 330', and the second coil 520 may be disposed on the side surface of the housing 110' facing the side surface of the guide member 330'.

[0248] In an exemplary embodiment, a plurality of second magnets 510' and a plurality of second coils 520 may be provided respectively. That is, the second magnets 510' may be provided on two side surfaces of the guide member 330', and the second coils 520 may be provided on two side surfaces of the housing 110' that face the two side surfaces of the guide member 330'.

[0249] The second coil 520 can be mounted on the substrate 800 and can be disposed on the two side surfaces of the housing 110', and can be exposed to the internal space of the housing 110' through through holes formed on the two side surfaces of the housing 110' respectively.

[0250] In an exemplary embodiment, the second magnet 510' may include two magnets, and the second coil 520 may include two coils. The magnets and coils may face each other in the direction of the second axis (Y-axis) and be separately disposed on each of the two side surfaces of the guide member 330' and the housing 110'.

[0251] The second magnet 510' may have different polarities magnetized sequentially along the direction of rotation. The surface of the second magnet 510' facing the second coil 520 may sequentially have an N pole (or S pole), a neutral region, and an S pole (or N pole) along the direction of rotation of the guide member 330' (e.g., the third axis (X-axis) direction). However, the configuration is not limited to this, and the second magnet 510' may also include a combination of a pair of monopole magnets with different polarities. In this way, when the second magnet 510' includes a combination of a pair of monopole magnets, the neutral region can be eliminated, thereby enhancing the driving force.

[0252] When power is applied to the second coil 520, the second coil 520 can interact with the second magnet 510' to generate a driving force in a direction perpendicular to the direction in which the magnet and the coil face each other (e.g., in the direction of the third axis (X-axis)), and the guide member 330' can rotate about the first axis (Z-axis) by the resultant force of the driving force.

[0253] Reference Figure 19 The housing 110' may include a plurality of guide slots g2' and g3' for accommodating a portion of the second spherical member B2' disposed between the housing 110' and the reflective module 300.

[0254] In an exemplary embodiment, a plurality of guide grooves g2' and g3' may be formed on a side surface of the housing 110' perpendicular to the longitudinal axis (Z-axis direction). A plurality of second ball members B2' may be disposed in the plurality of guide grooves g2' and g3', and the reflective module 300 may be supported by the housing 110' in the first axis (Z-axis) direction, while the second ball members B2' are positioned between the reflective module 300 and the housing 110'.

[0255] The second guide groove g2' can accommodate at least a portion of the center ball BC' and can have three inclined surfaces for three-point support of the center ball BC'. However, the configuration is not limited to this, and the second guide groove g2' can also have a recessed shape along the circular inclined surfaces.

[0256] The central ball BC' can be rotated in situ while being housed in the second guide groove g2', thereby forming the first axis (Z-axis).

[0257] The third guide slot g3' can accommodate at least a portion of the guide ball BG', and can be set in the same number as the number of guide balls BG' (e.g., two).

[0258] The third guide groove g3' may extend in the circumferential direction around the central ball BC'. However, the configuration is not limited to this, and the third guide groove g3' may have various shapes such as quadrilateral or circle, as long as there is sufficient area to allow the guide ball BG' to move.

[0259] In the example, the traction yoke 550' corresponding to the magnetic material can be inserted into the third guide groove g3', and the magnetic attraction can therefore act between the traction yoke 550' and the traction magnet 540' mounted on the guide member 330'.

[0260] The housing 110' may include multiple through holes through the side or bottom surface of the housing 110'. Some drive units (e.g., coils), position sensors, and image sensor modules 700 for driving the reflection module 300 or the second lens module 220 may be disposed in the multiple through holes.

[0261] A substrate 800 on which coils and the like are mounted can be disposed on a housing 110'. The substrate 800 can be configured to cover three side surfaces and a portion of the bottom surface of the housing 110' from the outside. In the example, coils and the like mounted on the substrate 800 can be exposed to the interior space of the housing 110' through through holes formed in the housing 110'.

[0262] In an exemplary embodiment, the multiple portions of the substrate 800 disposed on different surfaces of the housing 110' can all be integrally formed, and in this example, at least a portion of the substrate 800 can be made of a flexible material. However, the configuration is not limited to this, and the substrate 800 can be disposed in multiple portions.

[0263] Reference Figure 20 To prevent the first ball component B1 from separating, the bracket 320' can be supported by the guide component 330' in the first axis (Z axis) direction, while the first ball component B1 is positioned between the bracket 320' and the guide component 330'.

[0264] Additionally, a pair of magnetic materials 324 and 440 can be arranged to face each other in the first axis (Z-axis) direction between the support 320' and the guide member 330'.

[0265] In an exemplary embodiment, a pair of magnetic materials 324 and 440 may include a traction yoke (or a first magnetic material) 324 disposed on a support 320' and a traction magnet (or a second magnetic material) 440 disposed on a guide member 330'.

[0266] The traction yoke 324 and the traction magnet 440 can generate a magnetic attraction in the direction in which the traction yoke 324 and the traction magnet 440 face each other (i.e., the direction of the first axis (Z-axis)). Through the magnetic attraction generated therebetween, the support 320' can be tightly supported by the guide member 330', while the first ball member B1 is positioned between the support 320' and the guide member 330'.

[0267] In another exemplary embodiment, the positions of the pair of magnetic materials 324 and 440 may be interchanged. Additionally, in another exemplary embodiment, another type of magnetic interaction (e.g., magnetic repulsion) may act between the pair of magnetic materials 324 and 440.

[0268] In an exemplary embodiment, the first position sensors 472a and 472b can be mounted on the substrate 800 and disposed on the housing 110', and can face the first sensing magnets 471a and 471b through through holes. The first position sensors 472a and 472b can face the neutral regions of the first sensing magnets 471a and 471b.

[0269] The first position sensors 472a and 472b can be magnetic sensors to detect the amount of movement of the first sensing magnets 471a and 471b by means of changes in their magnetic flux. The first position sensors 472a and 472b can be configured to face the neutral regions of the first sensing magnets 471a and 471b, thereby effectively detecting changes in magnetic flux.

[0270] Figure 21 and Figure 22 This is a view showing the rotation drive of a bracket 320' included in a camera module 2000 according to another exemplary embodiment.

[0271] Reference Figure 21 and Figure 22 Through the electromagnetic interaction between the second magnet 510' and the second coil 520, the guide member 330' can rotate relative to the housing 110' about the first axis (Z-axis). When the guide member 330' rotates about the first axis (Z-axis), the bracket 320' supported by the guide member 330' can also rotate about the first axis (Z-axis) together.

[0272] As described above, the reflection module and the camera module including the reflection module according to the exemplary embodiment can have improved sensitivity and linearity for position sensing of the rotating reflection member.

[0273] While this disclosure includes specific examples, it will be apparent upon understanding the disclosure of this application that various changes in form and detail may be made to these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein are to be understood in a descriptive sense only and not for purposes of limitation. The description of features or aspects in each example should be considered applicable to similar features or aspects in other examples. Appropriate results may still be achieved if the described techniques are performed in a different order, and / or if components in the described system, architecture, device, or circuit are combined in a different manner and / or replaced or supplemented by other components or their equivalents.

[0274] Therefore, in addition to the above disclosure and all the accompanying drawings, the scope of this disclosure also includes the claims and their equivalents, that is, all variations within the scope of the claims and their equivalents should be understood to be included in this disclosure.

Claims

1. A reflection module, including: case; A guide member is disposed in the housing and configured to rotate about a first rotation axis; The support includes a reflective member and is configured to rotate relative to the guide member about a second rotation axis perpendicular to the first rotation axis; The first drive unit includes a first magnet disposed on the bracket and a first coil disposed on the housing to face the first magnet. as well as At least one pair of position sensors are disposed on one surface of the housing. In this configuration, the position sensor in the at least one pair of position sensors is arranged symmetrically with respect to the center of the first coil.

2. The reflection module according to claim 1, wherein, The at least one pair of position sensors are arranged in a direction parallel to the first rotation axis.

3. The reflection module according to claim 2, wherein, Each of the at least one pair of position sensors is configured to be spaced apart from the center of the first coil in a direction parallel to the first axis of rotation.

4. The reflection module according to claim 1, wherein, Based on an imaginary plane perpendicular to the first rotation axis and including the second rotation axis, among the at least one pair of position sensors, the number of position sensors facing the first side of the imaginary plane is equal to the number of position sensors facing the second side of the imaginary plane.

5. The reflection module according to claim 4, wherein, The distance between the position sensor on the first side facing the imaginary plane and the imaginary plane is equal to the distance between the position sensor on the second side facing the imaginary plane and the imaginary plane.

6. The reflection module according to claim 1 further includes at least one pair of first sensing magnets disposed on the bracket, and the at least one pair of first sensing magnets facing the at least one pair of position sensors.

7. The reflection module according to claim 6, wherein, The position sensing unit, including the at least one pair of position sensors and the at least one pair of first sensing magnets, is configured to sum the sensing results received from each of the at least one pair of position sensors.

8. The reflection module according to claim 6, wherein, Each of the first magnet and the first sensing magnet in the first driving unit has two polarities arranged in a direction parallel to the first rotation axis, and The regions where the first magnet and the first sensing magnet of the first driving unit face each other have the same polarity.

9. The reflection module according to claim 1, wherein, The at least one pair of position sensors are arranged in a direction parallel to the second rotation axis.

10. The reflection module according to claim 9, wherein, An imaginary plane perpendicular to the first rotation axis and including the second rotation axis passes through the at least one pair of position sensors.

11. The reflective module of claim 1, further comprising a first ball member disposed between the bracket and the guide member and comprising a plurality of balls spaced apart from each other along the second axis of rotation.

12. The reflection module according to claim 1, further comprising a second driving unit, the second driving unit comprising second magnets respectively disposed on corresponding side surfaces of the guiding member and a second coil disposed on the housing facing the second magnets. in, The corresponding side surface of the guide member is perpendicular to the second rotation axis.

13. The reflective module of claim 11 further includes a second spherical member disposed between the guide member and the housing, the second spherical member including a central sphere forming the first rotation axis and a guide sphere supporting the guide member.

14. A camera module, including: A bracket on which a reflective component is mounted; A guide member, wherein the bracket is disposed on the guide member, and the guide member is configured to rotate together with the bracket about a first rotation axis; A housing that accommodates the bracket and the guide member; The lens module, through which light reflected from the reflective member passes in the optical axis direction; The first driving unit includes a first magnet mounted on the bracket and a first coil facing the first magnet in the optical axis direction; as well as At least one pair of position sensors are disposed on one surface of the housing. The bracket is configured to rotate relative to the guide member about a second rotation axis perpendicular to the first rotation axis. In this configuration, one of the at least one pair of position sensors is symmetrically arranged with respect to an imaginary center line extending along the optical axis.

15. The camera module according to claim 14, wherein, Each of the at least one pair of position sensors is configured to be spaced apart from the imaginary center line in a direction parallel to the first rotation axis.

16. The camera module according to claim 15, wherein, The shortest distance between each of the at least one pair of position sensors and the imaginary centerline is equal to that between them.

17. A camera module, including: case; A guide member is disposed within the housing and configured to rotate about a first axis; The support includes a reflective member and is configured to rotate relative to the guide member about a second axis perpendicular to the first axis; as well as The first position sensing unit is configured to detect the rotation of the bracket. The first position sensing unit includes: A plurality of first sensing magnets are disposed on the surface of the bracket facing the housing in a first axial direction; and Multiple position sensors are disposed on the housing to face the multiple first sensing magnets respectively.

18. The camera module according to claim 17, wherein, At least one of the plurality of first sensing magnets includes a combination of a pair of monopole magnets with different polarities.

19. The camera module according to claim 17, wherein, The plurality of first sensing magnets are aligned along a third axis perpendicular to the first axis and the second axis, and are arranged symmetrically with respect to the second axis.

20. The camera module according to claim 17, wherein, The bracket also includes a protrusion extending toward the guide member in the first axial direction. The guide member includes an opening, at least a portion of the protrusion passing through the opening, and The first sensing magnet is disposed on the protrusion.

21. The camera module of claim 19, further comprising a first drive unit configured to provide a driving force to the bracket. in, The first drive unit includes a first magnet and a first coil. The first magnet is disposed on the surface of the bracket facing the housing in the third axial direction, and the first coil is disposed facing the first magnet.

22. The camera module according to claim 21, wherein, The first magnet comprises a combination of a pair of monopole magnets with different polarities.

23. The camera module of claim 17, further comprising a second drive unit configured to provide a driving force to the guide member. in, The second drive unit includes a second magnet and a second coil. The second magnet is disposed on the surface of the guide member facing the housing in the second axial direction, and the second coil is disposed facing the second magnet.

24. The camera module according to claim 23, wherein, The second magnet comprises a combination of a pair of monopole magnets with different polarities.

25. The camera module of claim 23, further comprising a plurality of ball joints disposed between the guide member and the housing. in, The plurality of ball components include a central ball located on the first axis and a plurality of guide balls supporting the rotation of the guide component.

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