Sensor shift actuator and camera module including the same

Abstract

The present disclosure relates to a sensor displacement actuator comprising: a housing having an internal space; an image sensor accommodated in the housing and having an imaging surface; a first moving frame accommodated in the housing and configured to be movable together with the image sensor in a direction parallel to the imaging surface; a second moving frame accommodated in the housing and configured to be movable together with the image sensor and the first moving frame in a direction perpendicular to the imaging surface; a bridge portion configured to be at least partially curved and to support movement of the image sensor in a direction parallel to the imaging surface; and a plurality of ball members disposed between the second moving frame and the housing and configured to support another movement of the image sensor in a direction perpendicular to the imaging surface. The present disclosure also relates to a camera module comprising the sensor displacement actuator.

Description

[0001] Cross-references to related applications

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2024-0060678, filed on May 8, 2024, with the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference for all purposes. Technical Field

[0003] This disclosure relates to a sensor shift actuator and a camera module including the sensor shift actuator. Background Technology

[0004] Recently, camera modules used in mobile devices are being manufactured to offer performance comparable to that of traditional cameras. For example, camera modules may come standard with focus adjustment and image stabilization features.

[0005] At the same time, as the frequency of video recording using mobile devices increases, the demand for camera modules that can provide high zoom ratios is also increasing.

[0006] Therefore, a high zoom ratio is achieved by having reflectors such as prisms in the camera module, allowing the incident light to have a relatively long total track length.

[0007] In addition, in the camera module including the reflector, focus adjustment and shake correction functions are implemented through the moving lens module and the reflector module, respectively.

[0008] The above information is presented as background information and is intended to aid in understanding this disclosure. No determination or assertion is made as to whether any of the above content can be used as prior art with respect to this disclosure. Utility Model Content

[0009] This summary portion is provided to briefly introduce the selection of 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.

[0010] In one general aspect, a sensor shift actuator includes a housing having an internal space, an image sensor housed in the housing and having an imaging surface, a first moving frame housed in the housing and configured to be movable together with the image sensor in a direction parallel to the imaging surface, a second moving frame housed in the housing and configured to be movable together with the image sensor and the first moving frame in a direction perpendicular to the imaging surface, a bridge portion configured to be at least partially curved and to support movement of the image sensor in the direction parallel to the imaging surface, and a plurality of ball members disposed between the second moving frame and the housing and configured to support another movement of the image sensor in the direction perpendicular to the imaging surface.

[0011] A sensor substrate disposed on one side of the image sensor can include a first moving portion coupled with the first moving frame, a second moving portion coupled with the second moving frame and spaced apart from the first moving portion, and a bridge portion disposed between the first moving portion and the second moving portion.

[0012] The first moving portion and the second moving portion can be formed of a rigid material, and the bridge portion can be formed of a flexible material.

[0013] The sensor shift actuator can further include a connection substrate configured to support movement of the image sensor, the first moving frame, and the second moving frame. One side of the connection substrate can be connected to the sensor substrate, and the other side of the connection substrate can be disposed in the housing.

[0014] The sensor substrate can further include a first connection portion extending from the first moving portion and connecting the first moving portion and the bridge portion, and a second connection portion extending from the second moving portion and connecting the second moving portion and the bridge portion. One side of the connection substrate can be connected with the first connection portion.

[0015] The sensor shift actuator can further include a main substrate disposed in the housing. The other side of the connection substrate can be coupled to the main substrate, and the connection substrate can be disposed to surround a portion of the main substrate while maintaining a gap between the connection substrate and the main substrate.

[0016] The connection substrate can include a first portion disposed to have a gap with the main substrate in a first direction parallel to the imaging surface, a second portion disposed to have a gap with the main substrate in a second direction parallel to the imaging surface and perpendicular to the first direction, and a third portion disposed to have a gap with the main substrate in a third direction perpendicular to the imaging surface. The first portion can be connected to the housing, and the third portion can be connected to the sensor substrate.

[0017] The surface of the main substrate can include a relief groove extending through the surface in the third direction in a portion overlapping the third portion. A portion of the third portion can be disposed in the relief groove.

[0018] The sensor shift actuator can further include a first shake correction magnet and a second shake correction magnet disposed on the first moving frame, and a first shake correction coil and a second shake correction coil disposed in the housing to respectively face the first shake correction magnet and the second shake correction magnet.

[0019] The sensor shift actuator can further include a focus adjustment magnet disposed on the second moving frame, and a focus adjustment coil disposed in the housing to face the focus adjustment magnet.

[0020] The sensor shift actuator can further include a yoke disposed in the housing to face the focus adjustment magnet.

[0021] In another general aspect, a camera module includes a lens module including at least one lens disposed along an optical axis direction, an image sensor having an imaging surface, a reflection member configured to reflect light toward the image sensor, and a sensor shift actuator configured to move the image sensor relative to the reflection member in a direction parallel to the imaging surface and in a direction perpendicular to the imaging surface. The sensor shift actuator includes a bridge portion disposed to be at least partially bent and configured to support movement of the image sensor in the direction parallel to the imaging surface, and a plurality of ball members configured to support movement of the image sensor in the direction perpendicular to the imaging surface while rolling in the direction perpendicular to the imaging surface.

[0022] The sensor shift actuator can further include a first moving frame configured to be movable together with the image sensor in the direction parallel to the imaging surface, and a second moving frame configured to be movable together with the image sensor and the first moving frame in the direction perpendicular to the imaging surface.

[0023] The sensor shift actuator can further include a sensor substrate disposed on one side of the image sensor. The sensor substrate can include a first moving portion coupled with the first moving frame, a second moving portion coupled with the second moving frame and spaced apart from the first moving portion, and a bridge portion disposed between the first moving portion and the second moving portion.

[0024] The sensor shift actuator can further include a main substrate disposed in a housing in which the image sensor is accommodated, and a connection substrate one side of which is connected to the sensor substrate and the other side of which is connected to the main substrate. The connection substrate can be disposed to have a gap between the main substrate in at least one of a direction parallel to the imaging surface and a direction perpendicular to the imaging surface. The connection substrate can be configured such that at least a portion of the connection substrate is bent when the image sensor moves.

[0025] The reflection member can be a parallelogram-shaped prism.

[0026] Other features and aspects will be apparent from the accompanying drawings and from the detailed description which follows. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a conceptual diagram of a camera module according to an embodiment of the disclosure.

[0028] Figure 2 is a diagram exemplarily illustrating movement of an image sensor according to an embodiment of the disclosure.

[0029] Figure 3 is a perspective view of a sensor shift actuator according to an embodiment of the disclosure.

[0030] Figure 4 is an exploded perspective view of a sensor shift actuator according to an embodiment of the disclosure.

[0031] Figure 5 is a perspective view of a sensor shift actuator with a shield removed.

[0032] Figure 6A is a cross-sectional view taken along line I-I' of Figure 3 .

[0033] Figure 6B is an enlarged view of portion A of Figure 6A .

[0034] Figure 7 is a plan view of a sensor substrate according to an embodiment of the disclosure.

[0035] Figure 8 is a cross-sectional view taken along line II-II' of Figure 3 .

[0036] Figure 9 is a diagram illustrating a ball guide portion according to an embodiment of the disclosure.

[0037] Figure 10 and Figure 11 is a diagram illustrating a connection substrate according to an embodiment of the disclosure.

[0038] Throughout the drawings and specific embodiments, identical reference numerals designate identical elements, unless otherwise described. The drawings can not be to scale and the relative dimensions, proportions, and depiction of elements in the drawings can be exaggerated for purpose of clarity, illustration and convenience. DETAILED DESCRIPTION

[0039] Hereinafter, while examples of the present disclosure will be described in detail with reference to the accompanying drawings, it should be noted that the examples are not limited thereto.

[0040] The following detailed description is presented to aid in understanding the methods, devices, and / or systems described herein. Various changes, modifications, and equivalents thereof will become apparent to those skilled in the art once the present disclosure is understood. For example, the order of the operations described herein can be altered, except that the operations must occur in the specific order as described, without departing from the spirit of the disclosure. Additionally, well-known features can be omitted or simplified to more clearly and succinctly convey the underlying contribution of the inventors to the art. The detailed description is not to be taken as limiting the examples described herein.

[0041] The features described herein can be implemented in different forms and should not be construed as limited to the examples described herein. Rather, these examples are provided as illustration of some of the many possible forms in which the methods, devices, and / or systems described herein can be implemented. Furthermore, the described examples are not intended to be limited to the form disclosed herein, but on the contrary, are intended to cover all modifications, equivalents, and alternatives falling within the scope of the present disclosure.

[0042] Throughout the specification, when an element such as a layer, region, or substrate is referred to as being "on" or "connected to" or "coupled to" another element, it can be directly on, directly connected to, or directly coupled to the other element, or one or more other elements can be interposed therebetween. Conversely, when an element is referred to as being "directly on", "directly connected to", or "directly coupled to" another element, there are no other elements interposed therebetween.

[0043] As used herein, the term "and / or" includes any one of the associated listed items, as well as any combination of any two or more of the associated listed items; likewise, "at least one of' includes any one of the associated listed items, as well as any combination of any two or more of the associated listed items.

[0044] Although terms such as "first," "second," and "third" can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, terms referring to a first element, a first component, a first region, a first layer or a first section in examples can also be referred to as a second element, a second component, a second region, a second layer or a second section.

[0045] Spatially relative terms, such as "on", "above", "below", "bottom", "top", "side", "upper", "lower", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Spatially relative terms can be intended to encompass different orientations of a device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, elements described as "above" or "on" other elements or features would then be oriented "below" or "on" the other elements or features. Thus, the term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0046] The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the present disclosure. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. The following description of examples of the present disclosure should not be interpreted, e.g., by manufacturers / suppliers of the respective products or tools, as pertaining only to physical embodiments of the examples. The examples of the present disclosure can be implemented in any product or tool having similar design or structure.

[0047] Due to manufacturing techniques and / or tolerances, the shapes might vary slightly from the shapes depicted in the figures. Hence, the examples described herein are not limited to the precise shapes as illustrated in the figures, but are to include variations in shapes that occur in manufacturing.

[0048] It should be noted that, in this document, the word "comprise", e.g., in phrases such as "comprises", "comprising", "comprised" and "comprise" is used in the sense of "including", "containing", and / or "characterized by", and not by way of limitation. To "comprise" something is, to this end, to include it or them, but not to "consist of" it or them.

[0049] The features of the examples described herein can be combined in a variety of ways as will be apparent following the understanding of the present disclosure. Also, although the examples described herein have various configurations, other configurations are possible in light of the present disclosure.

[0050] Figure 1 is a conceptual diagram of a camera module according to an embodiment of the present disclosure.

[0051] Referring to Figure 1 , the camera module 1 can include a housing 10, a plurality of reflection modules 20 and 40, a lens module 30, and an image sensor module 50.

[0052] The housing 10 can have an internal space. The plurality of reflection modules 20 and 40 and the lens module 30 can be disposed in the internal space of the housing 10.

[0053] The lens module 30 can include a plurality of lenses aligned in an optical axis direction.

[0054] The plurality of reflection modules 20 and 40 can include reflection members that change a path of light incident on the camera module 1. For example, the reflection members can be prisms.

[0055] The plurality of reflection modules 20 and 40 can include a first reflection module 20 disposed in front of the lens module 30 based on a propagation path of light and a second reflection module 40 disposed behind the lens module 30 based on the propagation path of light.

[0056] In an embodiment, the first reflection module 20 can reflect or refract light incident on the camera module 1 toward the lens module 30. Also, the second reflection module 40 can reflect or refract light passing through the lens module 30 toward the image sensor module 50.

[0057] According to an embodiment of the present disclosure, the camera module 1 can achieve a relatively long total track length by causing a propagation path of light incident on the camera module 1 to change at least twice.

[0058] Meanwhile, the light incident on the camera module 1 can finally reach the image sensor module 50.

[0059] The image sensor module 50 can include an image sensor S that converts light reaching the image sensor module 50 into an electrical signal.

[0060] The camera module 1 according to an embodiment of the present disclosure can not be limited to the structure shown in Figure 1 and some of the configurations can be modified or omitted. For example, shapes and sizes of the plurality of reflection modules 20 and 40 and the lens module 30 can be changed.

[0061] According to an embodiment of the disclosure, the camera module 1 can implement a focus adjustment function and a shake correction function by moving the image sensor S.

[0062] Figure 2 is an example illustrating movement of an image sensor according to an embodiment of the disclosure.

[0063] Referring to Figure 2 , the image sensor S can move in three mutually perpendicular axis directions. Figure 2 AF in means auto focus, OIS X means X-axis optical image stabilization, and OIS Y means Y-axis optical image stabilization.

[0064] In an embodiment of the disclosure, the image sensor S can move in three mutually perpendicular axis directions with respect to a reflection member P, which will be described later.

[0065] When adjusting focus, the image sensor S can move in a first axis direction (Z-axis direction, i.e., AF direction) perpendicular to the imaging surface, and when correcting shake, the image sensor S can move in two directions (e.g., a second axis direction (X-axis direction, i.e., OIS X direction) parallel to a long axis direction of the image sensor S and a third axis direction (Y-axis direction, i.e., OIS Y direction) parallel to a short axis direction of the image sensor S) parallel to the imaging surface.

[0066] According to an embodiment of the disclosure, the camera module 1 moves the relatively light image sensor S, and thus can perform precise focus adjustment and shake correction. In addition, power consumption can be reduced during focus adjustment and shake correction.

[0067] The camera module 1 according to an embodiment of the disclosure can include a sensor shift actuator 500 that moves the image sensor S.

[0068] Figure 3 is a perspective view of a sensor shift actuator according to an embodiment of the disclosure.

[0069] The sensor shift actuator 500 can be applied to Figure 1 the image sensor module 50 of . For example, the sensor shift actuator 500 can accommodate the image sensor module 50.

[0070] The sensor shift actuator 500 can include a driving portion that generates a driving force to move the image sensor S in three axis directions. For example, the driving portion can be a voice coil motor including a magnet and a coil.

[0071] Hereinafter, a detailed configuration of the sensor shift actuator 500 is described in detail with reference to Figure 4 , etc.

[0072] Figure 4 is an exploded perspective view of a sensor shift actuator according to an embodiment of the disclosure. Figure 5 is a perspective view of a sensor shift actuator with a shield removed. Figure 6A is a cross-sectional view taken along Figure 3 line I-I' of Figure 6B is a close-up view of portion A of Figure 6A Figure 8 is a cross-sectional view taken along Figure 3 line II-II' of

[0073] Referring to Figure 4 , the sensor shift actuator 500 can include a housing 510, a shield 520, a sensor substrate 530, a first moving frame 540, a second moving frame 550, and a driving part.

[0074] The housing 510 can have an internal space in which the sensor substrate 530 or the like is accommodated.

[0075] The housing 510 can have an internal space and can be in an open form in the first axis direction (Z-axis direction).

[0076] In an embodiment, the internal space of the housing 510 can sequentially accommodate the second moving frame 550, the first moving frame 540, and the sensor substrate 530 in the first axis direction (Z-axis direction).

[0077] In addition, a reflection member P can be disposed on the upper side of the second moving frame 550. For example, the reflection member P can be a prism having a parallelogram shape.

[0078] The reflection member P can be a part of the second reflection module 40 of Figure 1 . The reflection member P can be disposed in an open portion of the housing 510.

[0079] The shield 520 can be coupled to the housing 510 to cover the internal space. For example, the shield 520 can be coupled to the housing 510 on the opposite side (i.e., the sensor substrate 530 side) of the reflection member P.

[0080] The housing 510 and the shield 520 can be fixed members. Accordingly, the movement of the image sensor S or the like can be relative to the housing 510.

[0081] The image sensor S can be disposed on the sensor substrate 530.

[0082] In detail, referring to Figure 6A and Figure 6B , the image sensor S can be disposed on the sensor substrate 530 through a sub-housing SH. That is, the sub-housing SH in which the image sensor S is disposed can be coupled with the sensor substrate 530.​

[0083] In addition to the image sensor S, an optical filter F can be provided in the sub-housing SH. For example, the optical filter F can be provided between the reflection member P and the image sensor S, and can block light of a specific wavelength region among light passing through the reflection member P from entering the image sensor S.

[0084] Figure 7 is a plan view of a sensor substrate according to an embodiment of the disclosure.

[0085] The sensor substrate 530 can include a first moving portion 531 coupled to the sub-housing SH, a second moving portion 533 spaced apart from the first moving portion 531, and a bridge portion 532 supporting movement of the image sensor S.

[0086] In an embodiment, the sensor substrate 530 can be a rigid printed circuit substrate, the first moving portion 531 and the second moving portion 533 can be formed of a rigid material, and the bridge portion 532 can be formed of a flexible material.

[0087] The first moving portion 531 can be coupled to the sub-housing SH in which the image sensor S is provided, and can move together with the image sensor S in three mutually perpendicular axial directions.

[0088] Referring to Figure 6A , the sub-housing SH can be coupled to a first moving frame 540 moving in a second axial direction (X-axis direction) and a third axial direction (Y-axis direction) parallel to the imaging surface, and can move together with the first moving frame 540 in the second axial direction (X-axis direction) and the third axial direction (Y-axis direction).

[0089] Further, since the sub-housing SH is also coupled to the first moving portion 531, the first moving portion 531 can move together with the sub-housing SH and the first moving frame 540 in the second axial direction (X-axis direction) and the third axial direction (Y-axis direction).

[0090] The second moving portion 533 can include two portions spaced apart in the second axial direction (X-axis direction), with the first moving portion 531 interposed therebetween.

[0091] Referring to Figure 6B , the second moving portion 533 can be coupled to a second moving frame 550 moving in a first axial direction (Z-axis direction). Accordingly, the second moving portion 533 can move together with the second moving frame 550 in the first axial direction (Z-axis direction).

[0092] In this case, although not shown in the drawings, a leaf spring can be additionally provided to complement the coupling rigidity of the second moving part 533 and the second moving frame 550.

[0093] In an embodiment, the leaf spring can be structurally connected by being disposed on one side on the second moving part 533 and on the other side on the second moving frame 550.

[0094] The leaf spring can extend at least partially in the first axis direction (Z-axis direction) to connect the second moving part 533 and the second moving frame 550 in the first axis direction (Z-axis direction).

[0095] Referring to Figure 6B , the second moving part 533 can be spaced apart from the first moving frame 540 in the first axis direction (Z-axis direction).

[0096] That is, the second moving part 533 can be a fixed member that can not move among the second axis direction (X-axis direction) movement and the third axis direction (Y-axis direction) movement, in other words, the second moving part 533 can not move during the shake correction, and the second moving part 533 can be spaced apart from the first moving frame 540 so as not to interfere with the second axis direction (X-axis direction) movement and the third axis direction (Y-axis direction) movement of the first moving frame 540.

[0097] Meanwhile, the first moving part 531 can also move in the first axis direction (Z-axis direction) through the bridge part 532.

[0098] At least a portion of the bridge part 532 can be bent. The bridge part 532 can be formed of a flexible material, and can be a portion that supports the movement of the image sensor S.

[0099] The bridge part 532 can be disposed between the first moving part 531 and the second moving part 533.

[0100] The bridge part 532 can include a plurality of bridge elements. The plurality of bridge elements can be spaced apart by a plurality of slits, and can extend along the periphery of the first moving part 531.

[0101] The bridge part 532 can be connected to the first moving part 531 and the second moving part 533 through connection parts 534a and 534b.

[0102] In an embodiment, the connection parts 534a and 534b can be formed of a rigid material.

[0103] In an embodiment, the connection portion can include a first connection portion 534a which can be spaced apart in the third axis direction (Y axis direction) and connect the bridge portion 532 and the first moving portion 531. For example, the first connection portion 534a can partially extend from the first moving portion 531 in the third axis direction (Y axis direction). The first connection portion 534a can be connected to the first moving portion 531 and spaced apart from the second moving portion 533.

[0104] Further, the connection portion can include a second connection portion 534b which is spaced apart in the second axis direction (X axis direction) and connects the bridge portion 532 and the second moving portion 533. For example, the second connection portion 534b can partially extend from the second moving portion 533 in the second axis direction (X axis direction). The second connection portion 534b can be connected to the second moving portion 533 and spaced apart from the first moving portion 531.

[0105] In an embodiment, when the image sensor S moves in the second axis direction (X axis direction), the plurality of bridge elements connected to the second moving portion 533 can be bent. Further, when the image sensor S moves in the third axis direction (Y axis direction), the plurality of bridge elements connected to the first moving portion 531 can be bent.

[0106] Meanwhile, referring to Figure 5 , the sensor substrate 530 can be coupled with the connection substrate 570. Details regarding the connection substrate 570 will be described later.

[0107] The first moving frame 540 can have a shape with one side open.

[0108] In an embodiment, the first moving frame 540 can be formed in a shape, and can be disposed such that the one open side is adjacent to the connection substrate 570.

[0109] The first moving frame 540 can move in a direction parallel to the imaging surface of the image sensor S, that is, in the second axis direction (X axis direction) and the third axis direction (Y axis direction).

[0110] The first moving frame 540 can be coupled with the sub-housing SH in which the image sensor S is disposed, and can be coupled with the first moving portion 531 of the sensor substrate 530 through the sub-housing SH. The first moving frame 540, the sub-housing SH, and the first moving portion 531 of the sensor substrate 530 can move together in the second axis direction (X axis direction) and the third axis direction (Y axis direction).

[0111] The first shake correction driving part 563 can generate a driving force to move the first moving frame 540 or the like in the second axis direction (X axis direction).

[0112] The first shake correction driving part 563 can include Figure 4 a first shake correction magnet 5631 and a first shake correction coil 5633 as illustrated in FIG. 5B.

[0113] In an embodiment, the first shake correction magnet 5631 can be disposed on the first moving frame 540, and the first shake correction coil 5633 can be mounted on the main substrate 580 and disposed in the case 510.

[0114] The first shake correction magnet 5631 and the first shake correction coil 5633 can face each other in the second axis direction (X axis direction).

[0115] When power is applied to the first shake correction coil 5633, the first moving frame 540 or the like can move in the second axis direction (X axis direction) by electromagnetic force between the first shake correction magnet 5631 and the first shake correction coil 5633.

[0116] In an embodiment, the first shake correction magnet 5631 can be a movable member disposed in the first moving frame 540 and moving together with the first moving frame 540, and the first shake correction coil 5633 can be a fixed member disposed in the case 510.

[0117] The first shake correction driving part 563 can include a position sensor (or a second position sensor) 5635 that detects a position of the first moving frame 540. For example, the position sensor 5635 can be a Hall sensor.

[0118] The position sensor 5635 can be disposed to face the first shake correction magnet 5631. For example, the position sensor 5635 can be mounted on the main substrate 580 together with the first shake correction coil 5633.

[0119] The second shake correction driving part 565 can generate a driving force to move the first moving frame 540 or the like in the third axis direction (Y axis direction).

[0120] The second shake correction driving part 565 can include a second shake correction magnet 5651 and a second shake correction coil 5653.

[0121] In an embodiment, the second shake correction magnet 5651 can be disposed on the first moving frame 540, and the second shake correction coil 5653 can be mounted on the main substrate 580 and disposed in the case 510.

[0122] The second shake correction magnet 5651 and the second shake correction coil 5653 can face each other in the third axis direction (Y-axis direction).

[0123] When power is applied to the second shake correction coil 5653, the first moving frame 540 or the like can move in the third axis direction (Y-axis direction) by electromagnetic force between the second shake correction magnet 5651 and the second shake correction coil 5653.

[0124] In an embodiment, the second shake correction magnet 5651 can be a movable member disposed on the first moving frame 540 and moving together with the first moving frame 540, and the second shake correction coil 5653 can be a fixed member disposed in the housing 510.

[0125] The second shake correction driving part 565 can include a position sensor (or a third position sensor) 5655 that detects a position of the first moving frame 540. For example, the position sensor 5655 can be a Hall sensor.

[0126] The position sensor 5655 can be disposed to face the second shake correction magnet 5651. For example, the position sensor 5655 can be mounted on the main substrate 580 together with the second shake correction coil 5653.

[0127] The second moving frame 550 can have an internal space and can be open in the first axis direction (Z-axis direction).

[0128] In an embodiment, the internal space of the second moving frame 550 can sequentially accommodate the first moving frame 540 and the sensor substrate 530 in the first axis direction (Z-axis direction).

[0129] Further, a stopper 590 can be coupled to the second moving frame 550 to cover one side of the first moving frame 540. For example, the stopper 590 can be disposed to cover the side of the first moving frame 540 facing the sensor substrate 530.

[0130] The stopper 590 can prevent the first moving frame 540 accommodated in the second moving frame 550 from being separated from the second moving frame 550 due to impact or the like.

[0131] The second moving frame 550 can move in a direction perpendicular to an imaging surface of the image sensor S, that is, in the first axis direction (Z-axis direction).

[0132] The second moving frame 550 can be coupled with a second moving part 533 of the sensor substrate 530. The second moving part 533 can move together with the second moving frame 550 in the first axis direction (Z-axis direction).

[0133] When the second moving part 533 moves in the first axis direction (Z-axis direction), the first moving part 531 can also move in the first axis direction (Z-axis direction) through the bridge part 532, and thus the image sensor S can also move in the first axis direction (Z-axis direction).

[0134] In other words, when the second moving frame 550 moves in the first axis direction (Z-axis direction), the configuration accommodated in the second moving frame 550 can also move in the first axis direction (Z-axis direction).

[0135] Meanwhile, according to an embodiment of the disclosure, a leaf spring can also be included to complement the coupling structure of the second moving frame 550 and the second moving part 533 of the sensor substrate 530.

[0136] The focus adjustment driving part 561 can generate a driving force to move the second moving frame 550, etc. in the first axis direction (Z-axis direction).

[0137] The focus adjustment driving part 561 can include a focus adjustment magnet 5611 and a focus adjustment coil 5613.

[0138] In an embodiment, the focus adjustment magnet 5611 can be disposed in the second moving frame 550, and the focus adjustment coil 5613 can be mounted on the main substrate 580 and disposed in the housing 510.

[0139] The focus adjustment magnet 5611 and the focus adjustment coil 5613 can face each other in the second axis direction (X-axis direction).

[0140] When power is applied to the focus adjustment coil 5613, the second moving frame 550, etc. can move in the first axis direction (Z-axis direction) by electromagnetic force between the focus adjustment magnet 5611 and the focus adjustment coil 5613.

[0141] In an embodiment, the focus adjustment magnet 5611 can be a movable member disposed on the second moving frame 550 and moving together with the second moving frame 550, and the focus adjustment coil 5613 can be a fixed member disposed in the housing 510.

[0142] The focus adjustment driving part 561 can include a position sensor (or a first position sensor) 5615 that detects a position of the second moving frame 550. For example, the position sensor 5615 can be a Hall sensor.

[0143] The position sensor 5615 can be disposed to face the focus adjustment magnet 5611. For example, the position sensor 5615 can be mounted on the main substrate 580 together with the focus adjustment coil 5613.

[0144] The second moving frame 550 can move with respect to the housing 510 in a first axis direction (Z axis direction).

[0145] The plurality of ball members B can be disposed between the second moving frame 550 and the housing 510 to reduce friction when the second moving frame 550 moves.

[0146] The plurality of ball members B can be spaced apart with the focus adjustment magnet 5611 having a focal point therebetween.

[0147] The plurality of ball members B can include a plurality of balls (spheres) disposed in the first axis direction (Z axis direction). When the second moving frame 550 moves in the first axis direction (Z axis direction), the plurality of ball members B can roll in the first axis direction (Z axis direction).

[0148] Figure 9 FIG. 1 is a diagram illustrating a ball guide portion according to an embodiment of the disclosure.

[0149] Referring to Figure 9 The plurality of ball members B can be accommodated in guide grooves respectively disposed in the second moving frame 550 and the housing 510.

[0150] In an embodiment, the second moving frame 550 can be provided with a first guide groove G1 and a second guide groove G2, and the housing 510 can be provided with a third guide groove G3 and a fourth guide groove G4.

[0151] The first guide groove G1 can face the third guide groove G3, the second guide groove G2 can face the fourth guide groove G4, and the plurality of ball members B can be disposed therebetween.

[0152] The first guide groove G1 to the fourth guide groove G4 can extend in the first axis direction (Z axis direction). Also, some of the first guide groove G1 to the fourth guide groove G4 can have different cross-sectional shapes.

[0153] Meanwhile, a yoke 5617 can be disposed in the housing 510. In detail, the yoke 5617 can be disposed to cover an opposite surface of one surface of the main substrate 580 on which the focus adjustment coil 5613 is mounted (i.e., the other surface of the main substrate 580).

[0154] The yoke 5617 can be disposed to face the focus adjustment magnet 5611 with the focus adjustment coil 5613 therebetween.

[0155] The yoke 5617 can generate a force with the focus adjustment magnet 5611. For example, an attractive force can be applied between the yoke 5617 and the focus adjustment magnet 5611 in a direction in which the yoke 5617 and the focus adjustment magnet 5611 face each other (in the second axis direction (X axis direction) based on the drawings).

[0156] The plurality of ball members B can be kept in contact with the guide grooves while being accommodated in the guide grooves generated by the attractive force between the yoke 5617 and the focus adjustment magnet 5611, which are provided in the second moving frame 550 and the housing 510.

[0157] According to embodiments of the present disclosure, the movement of the image sensor S or the like during the shake correction and the focus adjustment, in addition to the bridge portion 532 of the sensor substrate 530 and the plurality of ball members B described above, can be supported by the connection substrate 570.

[0158] Figure 10 and Figure 11 is a view illustrating a connection substrate according to an embodiment of the present disclosure.

[0159] The connection substrate 570 can be formed of a flexible material to support the movement of the image sensor S or the like.

[0160] Referring to Figure 10 or the like, the connection substrate 570 can be disposed to surround at least a portion of the main substrate 580 from the outside of the main substrate 580.

[0161] The connection substrate 570 can be coupled with the sensor substrate 530 and the main substrate 580.

[0162] The connection substrate 570 can be disposed in the housing 510 by being coupled with the main substrate 580.

[0163] In detail, the connection substrate 570 can be coupled with the first connection portion 534a of the sensor substrate 530 and the main substrate 580. The first connection portion 534a and the main substrate 580 can each be formed of a rigid material. The connection substrate 570 can support the movement of the image sensor S or the like while being coupled with the image sensor S or the like.

[0164] The connection substrate 570 can be disposed to have a gap g with the main substrate 580 in at least one of the first axis direction (Z-axis direction), the second axis direction (X-axis direction), and the third axis direction (Y-axis direction).

[0165] Accordingly, when the image sensor S or the like moves, the connection substrate 570 can support the movement of the image sensor S or the like by moving with respect to the main substrate 580 within the gap g formed between the connection substrate 570 and the main substrate 580. In this case, the amount of movement of the image sensor S or the like can be increased by the amount of movement of the connection substrate 570.

[0166] That is, according to embodiments of the present disclosure, the driving distance of the image sensor S can be improved during the focus adjustment and the shake correction.

[0167] The connection substrate 570 can include a first portion 571 coupled with the main substrate 580, a second portion 572 extending between the first portions 571, and a third portion 573 coupled with the first connection portion 534a of the sensor substrate 530 and connected to the second portion 572.

[0168] The first portion 571 can include two portions spaced apart in the second axis direction (X-axis direction). The two portions can each be coupled with the main substrate 580. Also, any one of the two portions can include a connection portion, and the connection portion can be coupled with the main substrate 580.

[0169] The first portion 571 can be disposed to have a gap g from a portion of the main substrate 580 disposed on the inner side of the first portion 571 in the second axis direction (X-axis direction) in general.

[0170] In an embodiment, when the image sensor S or the like moves in the second axis direction (X-axis direction), the first portion 571 can support the movement of the image sensor S or the like by moving within the range of the gap g formed between the first portion 571 and the main substrate 580 in the second axis direction (X-axis direction).

[0171] The second portion 572 can extend between the two portions of the first portion 571 spaced apart in the second axis direction (X-axis direction). Thus, the second portion 572 can be in the form of extending in the second axis direction (X-axis direction).

[0172] The second portion 572 can be disposed to have a gap g from a portion of the main substrate 580 disposed on the inner side of the second portion 572 in the third axis direction (Y-axis direction) in general.

[0173] In an embodiment, when the image sensor S or the like moves in the third axis direction (Y-axis direction), the second portion 572 can support the movement of the image sensor S or the like by moving within the range of the gap g formed between the second portion 572 and the main substrate 580 in the third axis direction (Y-axis direction).

[0174] One side of the third portion 573 can be coupled with the first connection portion 534a of the sensor substrate 530, and the other side can be coupled with the second portion 572.

[0175] The third portion 573 can extend between the first connection portion 534a and the second portion 572 in the third axis direction (Y-axis direction), and the other side of the third portion 573 coupled with the second portion 572 can be formed to be bent by about 90 degrees at least in part.

[0176] Meanwhile, at a portion where the third portion 573 is bent to be coupled with the second portion 572, the third portion 573 can interfere with a portion of the main substrate 580 disposed on the inner side of the second portion 572.

[0177] To prevent this, the main substrate 580 can include a relief groove 581 in the first axis direction (Z-axis direction) in a portion overlapping the third portion 573.

[0178] A gap g can be formed between the third portion 573 and the relief groove 581 in the first axis direction (Z-axis direction).

[0179] In an embodiment, when the image sensor S or the like moves in the first axis direction (Z-axis direction), the third portion 573 can support movement of the image sensor S or the like by moving in the range of the gap g formed between the third portion 573 and the relief groove 581 of the main substrate 580 in the first axis direction (Z-axis direction).

[0180] The sensor shift actuator according to an embodiment of the disclosure and the camera module including the same can precisely adjust a focus and correct a shake with a relatively small driving force.

[0181] One aspect of the disclosure provides a sensor shift actuator capable of precisely performing focus adjustment and shake correction, and a camera module including the same.

[0182] While specific examples have been shown and described in the foregoing detailed description, it will be understood that various changes in form and details can be made without departing from the spirit and scope of the claims and their equivalents. The examples described herein are to be understood to offer description of examples rather than limitation. Descriptions of features or aspects within each example should be considered to apply to similar features or aspects within other examples. Proper results can still be achieved if the described techniques are performed in a different order, and / or if the described systems, architectures, devices, or circuits are combined or substituted with other components or their equivalents, or if other components are used instead of, or in addition to, the described components. Thus, the scope of the disclosure should not be limited by the specific implementations described but should be given the full scope of the appended claims and their equivalents.

Claims

1. Sensor displacement actuator, characterized in that The sensor shift actuator includes: a housing having an internal space; an image sensor housed in the housing and having an imaging surface; a first moving frame housed in the housing and configured to be movable together with the image sensor in a direction parallel to the imaging surface; a second moving frame housed in the housing and configured to be movable together with the image sensor and the first moving frame in a direction perpendicular to the imaging surface; a bridge portion configured to be at least partially curved and to support movement of the image sensor in the direction parallel to the imaging surface; and a plurality of ball members disposed between the second moving frame and the housing and configured to support another movement of the image sensor in the direction perpendicular to the imaging surface.

2. The sensor-shifting actuator of claim 1, wherein A sensor substrate disposed on one side of the image sensor includes: a first moving portion coupled with the first moving frame; a second moving portion coupled with the second moving frame and spaced apart from the first moving portion; and the bridge portion disposed between the first moving portion and the second moving portion. 3.The sensor shift actuator of claim 2, wherein: the first moving portion and the second moving portion are formed of a rigid material, and the bridge portion is formed of a flexible material.

4. The sensor-shifting actuator of claim 2, wherein The sensor shift actuator further includes a connection substrate configured to support the movement of the image sensor and the first moving frame and the another movement of the image sensor, the first moving frame, and the second moving frame, and wherein one side of the connection substrate is connected to the sensor substrate, and another side of the connection substrate is disposed in the housing. 5.The sensor shift actuator of claim 4, wherein: the sensor substrate further includes: a first connection portion extending from the first moving portion and connecting the first moving portion and the bridge portion; and a second connection portion extending from the second moving portion and connecting the second moving portion and the bridge portion, and wherein the one side of the connection substrate is connected with the first connection portion.

6. The sensor-shifting actuator of claim 4, wherein The sensor shift actuator further includes a main substrate disposed in the housing, wherein the another side of the connection substrate is coupled to the main substrate, and the connection substrate is disposed to surround a portion of the main substrate while maintaining a gap between the connection substrate and the main substrate.

7. The sensor-shifting actuator of claim 6, wherein The connection substrate includes: a first portion disposed to have a gap between the main substrate in a first direction parallel to the imaging surface; a second portion disposed to have a gap between the main substrate in a second direction parallel to the imaging surface and perpendicular to the first direction; and a third portion disposed to have a gap between the main substrate in a third direction perpendicular to the imaging surface, and wherein the first portion is connected to the housing, and the third portion is connected to the sensor substrate. 8.The sensor shift actuator of claim 7, wherein: The surface of the main substrate includes an avoidance groove extending through the surface in the third direction in a portion overlapping the third portion, and wherein a portion of the third portion is disposed in the avoidance groove.

9. The sensor-shifting actuator of claim 1, wherein, The sensor shift actuator further includes: a first shake correction magnet and a second shake correction magnet disposed on the first moving frame; and a first shake correction coil and a second shake correction coil disposed in the housing to face the first shake correction magnet and the second shake correction magnet, respectively.

10. The sensor-shifting actuator of claim 1, wherein, The sensor shift actuator further includes: a focus adjustment magnet disposed on the second moving frame; and a focus adjustment coil disposed in the housing to face the focus adjustment magnet.

11. The sensor-shifting actuator of claim 10, wherein, The sensor shift actuator further includes a yoke disposed in the housing to face the focus adjustment magnet.

12. A camera module characterized by, The camera module includes: a lens module including at least one lens disposed along an optical axis direction; an image sensor having an imaging surface; a reflection member configured to reflect light toward the image sensor; and a sensor shift actuator configured to move the image sensor relative to the reflection member in a direction parallel to the imaging surface and a direction perpendicular to the imaging surface, wherein the sensor shift actuator includes: a bridge portion disposed to be at least partially bent and configured to support movement of the image sensor in the direction parallel to the imaging surface; and a plurality of ball members configured to support movement of the image sensor in the direction perpendicular to the imaging surface while rolling in the direction perpendicular to the imaging surface.

13. The camera module of claim 12, wherein, The sensor shift actuator further includes: a first moving frame configured to be movable together with the image sensor in the direction parallel to the imaging surface; and a second moving frame configured to be movable together with the image sensor and the first moving frame in the direction perpendicular to the imaging surface.

14. The camera module of claim 13, wherein, The sensor shift actuator further includes a sensor substrate disposed on one side of the image sensor, and wherein the sensor substrate includes: a first moving portion coupled to the first moving frame; a second moving portion coupled to the second moving frame and spaced apart from the first moving portion; and the bridge portion disposed between the first moving portion and the second moving portion.

15. The camera module of claim 14, wherein, The sensor shift actuator further includes: a main substrate disposed in a housing that accommodates the image sensor; and a connection substrate, one side of the connection substrate being connected to the sensor substrate and the other side of the connection substrate being connected to the main substrate, wherein the connection substrate is disposed to have a gap between the main substrate in at least one of the direction parallel to the imaging surface and the direction perpendicular to the imaging surface, and wherein the connection substrate is configured to be bent at least a portion thereof when the image sensor moves.

16. The camera module of claim 12, wherein, The reflection member is a parallelogram-shaped prism.

Images