Sensor actuators, camera modules and electronic devices

Abstract

A sensor actuator is provided. The sensor actuator includes: a movable body on which an image sensor having an imaging surface is disposed; a fixed body configured to house the movable body; and a driver configured to provide a driving force to move the image sensor, wherein the driver includes a wire portion having multiple wires, the length of which changes when power is applied to the multiple wires, wherein each of the multiple wires is configured to have a first end coupled to the fixed body and a second end coupled to the movable body, and wherein one of the first and second ends of each of the multiple wires is connected to the fixed body or the movable body via a resilient portion. A camera module including the sensor actuator and electronic devices including the camera module are also provided.

Description

[0001] Cross-reference to related applications

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2022-0002965, filed on January 7, 2022, with the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference for all purposes. Technical Field

[0003] The following description relates to a sensor actuator, a camera module including a sensor actuator, and an electronic device including a camera module. Background Technology

[0004] Recently, camera modules have been implemented in mobile communication terminals such as, but not limited to, smartphones, tablet PCs, and laptop computers.

[0005] Additionally, the camera module may include actuators with focus adjustment functions or operations and optical image stabilization functions or operations to generate high-resolution images.

[0006] For example, the focus can be adjusted by moving the lens module in the direction of the optical axis (Z-axis), or jitter can be corrected by moving the lens module in a direction perpendicular to the optical axis (Z-axis).

[0007] However, recently, with the improvement of camera module performance, the weight of lens modules has increased, and due to the weight of the drivers for moving lens modules, it may be difficult to accurately control the driving force required for image stabilization. Summary of the Invention

[0008] The summary portion of this invention is intended to provide a brief overview of the chosen inventive 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 sensor actuator includes a movable body on which an image sensor having an imaging surface is disposed; a fixed body configured to house the movable body; and a driver configured to provide a driving force to move the image sensor, wherein the driver includes a plurality of wires having a length that varies when power is applied, wherein each of the plurality of wires is configured to have a first end coupled to the fixed body and a second end coupled to the movable body, and wherein one of the first and second ends of each of the plurality of wires is connected to the fixed body or the movable body via an elastic portion.

[0010] The fixed body can include a first support plate, and the movable body can include a second support plate, and the elastic portion can be disposed on one of the first support plate and the second support plate.

[0011] The driver can include a first line portion, a second line portion, a third line portion, and a fourth line portion, wherein each of the first line portion to the fourth line portion can include two lines, and wherein each of the first line portion to the fourth line portion can be configured to have a first end fixed to the fixed body and a second end fixed to the movable body.

[0012] Each of the first line portion and the second line portion can be configured to provide a driving force to move the movable body in a first direction parallel to the imaging plane, and a moving direction of the movable body based on an operation of the first line portion and a moving direction of the movable body based on an operation of the second line portion can be opposite to each other.

[0013] When power is applied to one of the first line portion and the second line portion, a length of the one of the first line portion and the second line portion can decrease, and wherein the elastic portion connected to the line portion other than the one of the first line portion and the second line portion among the first line portion to the fourth line portion can be elastically deformed.

[0014] Each of the third line portion and the fourth line portion can be configured to provide a driving force to move the movable body in a second direction parallel to the imaging plane, and a moving direction of the movable body based on an operation of the third line portion and a moving direction of the movable body based on an operation of the fourth line portion can be opposite to each other.

[0015] When power is applied to one of the third line portion and the fourth line portion, a length of the one of the third line portion and the fourth line portion can decrease, and wherein the elastic portion connected to the line portion other than the one of the third line portion and the fourth line portion among the first line portion to the fourth line portion can be elastically deformed.

[0016] The movable body can be configured to rotate by at least two lines configured to generate a driving force in opposite directions.

[0017] Each of the first line portion and the second line portion can be configured to provide a driving force to move the movable body in a first direction parallel to the imaging plane, wherein the two lines of the first line portion and the two lines of the second line portion can be spaced apart from each other in a second direction parallel to the imaging plane, and wherein the first direction and the second direction are perpendicular to each other.

[0018] Each of the third line portion and the fourth line portion can be configured to provide a driving force to move the movable body in a second direction, and wherein the two lines of the third line portion and the two lines of the fourth line portion can be spaced apart from each other in a first direction.

[0019] A ball component configured to support the movement of a movable body can be positioned between the movable body and the fixed body.

[0020] The sensor actuator may include a support substrate configured to support a movable body, wherein the support substrate includes a deformable portion that elastically deforms as the movable body moves.

[0021] The support substrate may also include a movable part and a fixed part, the movable part being disposed on the movable part, the fixed part being connected to the fixed part, and the deformable part being elastically connected to the fixed part.

[0022] The sensor actuator may further include a position sensing portion configured to sense the position of the image sensor, and includes a sensing coil disposed on one of the movable body and the fixed body, and a sensing yoke portion disposed on the other of the movable body and the fixed body, wherein the sensing yoke portion includes a plurality of sensing yoke portions spaced apart from each other in a direction parallel to the imaging plane, and wherein each sensing yoke portion is configured to have a width that varies in the direction of movement of the image sensor.

[0023] The plurality of sensing yokes may include a first sensing yoke and a second sensing yoke, wherein each of the first sensing yoke and the second sensing yoke is opposite to the sensing coil in a direction perpendicular to the imaging plane, and wherein each of the first sensing yoke and the second sensing yoke has a width that increases and decreases in the direction of movement of the image sensor, and the first sensing yoke and the second sensing yoke have shapes in which the width increases or decreases at different positions.

[0024] In general, the camera module includes: a lens module including at least one lens; a housing configured to house the lens module; a first driver configured to move the lens module in an optical axis direction; a fixed body coupled to the housing; a movable body housed in the fixed body and including an image sensor disposed in the movable body; and a second driver configured to provide driving force to move the image sensor in a first direction and a second direction perpendicular to the optical axis direction, wherein the second driver includes a plurality of wires having a length that varies when power is applied, wherein each of the plurality of wires is configured to have a first end coupled to the fixed body and a second end coupled to the movable body, and wherein one of the first end and the second end of each of the plurality of wires is connected to the fixed body or the movable body by an elastic portion.

[0025] In general, an electronic device includes a camera module including: a movable body on which an image sensor is disposed; a fixed body configured to accommodate the movable body; a driver configured to provide a driving force to move the image sensor, the driver including: wire portions including a first end coupled to the fixed body and a second end coupled to the movable body, and configured to provide the driving force to move the movable body in a first direction and a second direction parallel to an imaging face of the image sensor, and configured to rotate the movable body about an optical axis, wherein each of the wire portions has a length that changes when power is applied.

[0026] Each of the wire portions is a shape memory alloy.

[0027] The first direction can include directions opposite to each other, the second direction can include directions opposite to each other, and the first direction is perpendicular to the second direction.

[0028] Other features and aspects will become apparent from the associated claims, the drawings, and the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a cross-sectional view illustrating an exemplary sensor actuator according to one or more embodiments.

[0030] Figure 2 , Figure 3 and Figure 4 is a cross-sectional view illustrating an exemplary sensor actuator according to one or more embodiments.

[0031] Figure 5 is a perspective view illustrating an example in which a driver is connected to a fixed body and a movable body according to one or more embodiments.

[0032] Figure 6 is a plan view illustrating a second support plate according to one or more embodiments.

[0033] Figure 7 is a perspective view illustrating an example in which a driver is connected to a first support plate and a second support plate according to one or more embodiments.

[0034] Figure 8 is a perspective view illustrating an example in which a portion of a driver is fixed to a first support plate and a second support plate according to one or more embodiments.

[0035] Figure 9A , Figure 9B , Figure 10A , Figure 10B , Figure 11A and Figure 11B is a view illustrating a driving force direction of a driver according to one or more embodiments.

[0036] Figure 12A , Figure 12B , Figure 13A , Figure 13B , Figure 14A and Figure 14B It is a diagram showing the direction of the driving force of a driver according to one or more embodiments.

[0037] Figure 15 This is a diagram illustrating the configuration of a position sensing portion according to one or more embodiments.

[0038] Figure 16 This is a diagram illustrating the sensing yoke portion and sensing coil of a position sensing portion according to one or more embodiments.

[0039] Figure 17A and Figure 17B It is a diagram showing the change in the positional relationship between the first sensing yoke portion and the first sensing coil according to one or more embodiments.

[0040] Figure 18 It is a graph showing the inductance of the first sensing coil according to one or more embodiments, as the image sensor moves in one direction.

[0041] Figure 19A It is a graph showing multiple inductance levels of a first sensing coil corresponding to a first sensing yoke and a second sensing yoke of a sensor actuator, according to one or more embodiments.

[0042] Figure 19B It is shown Figure 19A The graph shows the arctangent values ​​for multiple inductance levels.

[0043] Figure 20 This is a cross-sectional view showing an exemplary camera module according to one or more embodiments.

[0044] Figure 21 This is a cross-sectional view showing an exemplary camera module according to one or more embodiments.

[0045] Throughout the accompanying drawings and detailed embodiments, the same reference numerals may refer to the same or similar elements. For purposes of clarity, illustration, and convenience, the drawings may not be drawn to scale, and the relative dimensions, scale, and depiction of elements in the drawings may be exaggerated. Detailed Implementation

[0046] The following detailed description is presented to aid the reader in gaining a comprehensive understanding of the methods, apparatuses, and / or systems described herein. However, various changes, modifications, and equivalents can be used, and aspects of the methods, apparatuses, and / or systems described herein can be employed in combinations not specifically described herein without departing from the spirit or scope of the present disclosure. For example, the sequence in which operations are described is not necessarily the sequence in which operations are performed, and steps can be combined in whole or in part with other steps, replaced with other steps, or performed separately from other steps. Additionally, descriptions of features, configurations, and / or aspects can be presented in terms of examples. Such descriptions should not be interpreted as an intent to exclude other examples or aspects. For example, features described in terms of one example can be combined with features described in terms of another example. Furthermore, descriptions of features, configurations, and / or aspects can be presented in terms of examples that contain no more than one or a subset of the features described in the example. Such descriptions should not be interpreted as an intent to exclude examples that contain other features or aspects.

[0047] The features described herein can be implemented in different forms and are not to be construed as limited to the examples described herein. Rather, the examples described herein have been provided merely for the purposes of illustration so that those with ordinary skill in the art will be able to make and use embodiments in accordance with the present disclosure. Further, the description should not be construed as indicating that aspects or features are necessarily related or that all examples have the same advantages.

[0048] Although terminology can be used in this document, such as "first," "second," and "third," such terminology is only used to differentiate one component, element, region, layer, or section from another component, element, region, layer, or section. More specifically, such terminology is used to distinguish one component, element, region, layer, or section from another component, element, region, layer, or section. Therefore, a first component, a first element, a first region, a first layer, or a first part mentioned in the examples can also be called a second component, a second element, a second region, a second layer, or a second part without departing from the teachings of the examples described herein.

[0049] Throughout this specification, where an element, component, or layer is described as being positioned "on," "connected to," or "coupled to" another element, component, or layer, it can be directly positioned on, directly connected to, or directly coupled to the other element, component, or layer or intervening elements, components, or layers can be present. In contrast, where an element, component, or layer is described as being "directly on," "directly connected to," or "directly coupled to" another element, component, or layer, there are no intervening elements, components, or layers present. Similarly, as used herein, the term and the like can be interpreted to mean that the elements, components, or layers are in direct contact.

[0050] The terminology used herein is for the purpose of describing particular examples only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a," "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. As used herein, the terms "comprises," "comprising," "includes," "including," and "has," "having," their derivatives, and the like, indicate the presence of the stated features, numbers, operations, elements, components, and / or the like, but do not preclude the presence or addition of one or more other features, numbers, operations, elements, components, and / or the like. In this document, the word "may" is used in a permissive sense (i.e., meaning having the potential to), rather than the mandatory sense (i.e., meaning must). Unless otherwise noted, the use of the word "a" or "an" herein, for example in a phrase such as "a material" or "an element" means "one or more" of such material or element.

[0051] 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 to which this disclosure belongs. For example, terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and are not to be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0052] The sensor actuator 100 according to one or more embodiments can be one of a plurality of components of a camera module. Also, the camera module can be mounted on a portable electronic device. The portable electronic device can be implemented as a portable electronic device such as a mobile communication terminal, a smart phone, or a tablet PC.

[0053] Figure 1 is a cross-sectional view illustrating a sensor actuator according to one or more embodiments.

[0054] Referring to Figure 1 The sensor actuator 100 according to one or more embodiments can include a movable body 110, a fixed body 130, and a driver 120.

[0055] The movable body 110 can include a sensor substrate 112. The movable body 110 can be disposed to move with respect to the fixed body 130.

[0056] The image sensor 111 can be disposed on a first surface of the sensor substrate 112, and a reinforcement plate 113 that reinforces rigidity of the sensor substrate 112 can be coupled to a second surface of the sensor substrate 112. Since the movable body 110 moves together with the reinforcement plate 113, the sensor substrate 112 and the fixed body 130 can be prevented from contacting each other.

[0057] The sensor substrate 112 can be connected to the connector substrate 190 to transmit a signal of the image sensor 111 to an external entity. For example, the sensor substrate 112 and the connector substrate 190 can be electrically connected to each other through a connection portion 191. The connection portion 191 can include a plurality of bridge portions that are flexibly bent according to movement of the image sensor 111.

[0058] A signal of the image sensor 111 can be transmitted to other electronic components through the sensor substrate 112, the connection portion 191, and the connector substrate 190.

[0059] In an exemplary embodiment, the sensor substrate 112 can have an accommodation space to accommodate the image sensor 111. In an example, the accommodation space can have the form of a recess or a hole. The image sensor 111 can be disposed in the accommodation space and can be electrically connected to the sensor substrate 112.

[0060] The fixed body 130 of the actuator can include a housing 131. The housing 131 can have an internal space to accommodate the movable body 110.

[0061] The driver 120 can move the movable body 110.

[0062] The movable body 110 can move in a direction perpendicular to a direction in which an imaging surface 111a of the image sensor 111 is oriented, based on an operation of the driver 120. In an exemplary embodiment, the driver 120 can move the image sensor 111 to compensate for a shake that occurs when a camera module 10 and 20 ( Figure 20 and Figure 21 ) on which the image sensor 111 is mounted performs imaging.

[0063] The driver 120 can move the movable body 110 including the image sensor 111 in a first direction (X direction) and a second direction (Y direction) perpendicular to an optical axis (Z axis). The first direction (X direction) and the second direction (Y direction) can intersect each other. For example, the driver 120 can allow the movable body 110 to move in the first direction (X direction) and / or the second direction (Y direction) perpendicular to the optical axis (Z axis), thereby correcting the shake. In addition, the driver 120 can rotate the movable body 110 using the optical axis (Z axis) as a rotation axis.

[0064] The driver 120 can include a wire portion, a length of which can change with application of power. The wire portion can include a plurality of wires, and each of the plurality of wires can be a shape memory alloy.

[0065] In the exemplary embodiment, a direction in which the imaging surface 111a of the image sensor 111 is oriented can be referred to as an optical axis (Z-axis) direction. That is, the movable body 110 can move with respect to the fixed body 130 in a direction perpendicular to the optical axis (Z-axis).

[0066] In the drawings, a configuration in which the movable body 110 can move in a direction parallel to the imaging surface 111a of the image sensor 111 can mean that the movable body 110 can move in a direction perpendicular to the optical axis (Z-axis).

[0067] A configuration in which the movable body 110 can move in the first direction (X direction) can mean that the movable body 110 can move in a direction perpendicular to the optical axis (Z-axis).

[0068] In addition, the first direction (X direction) and the second direction (Y direction) can be examples of two directions perpendicular to the optical axis (Z-axis) and intersecting each other, and in the exemplary embodiment, the first direction (X direction) and the second direction (Y direction) can be understood as two directions perpendicular to the optical axis (Z-axis) and intersecting each other.

[0069] In the exemplary embodiment, the ball member B can be disposed between the fixed body 130 and the movable body 110.

[0070] The first guide groove 132 and the second guide groove 114, which accommodate at least a portion of the ball member B, can be respectively disposed in the fixed body 130 and the movable body 110. For example, the first guide groove 132 and the second guide groove 114 can be formed on surfaces of the fixed body 130 and the movable body 110 facing each other in the optical axis (Z-axis) direction.

[0071] The ball member B can be disposed between the first guide groove 132 of the fixed body 130 and the second guide groove 114 of the movable body 110. Accordingly, when the movable body 110 moves within the fixed body 130, the movable body 110 can be guided by the ball member B so that the movable body 110 can move smoothly.

[0072] The first guide groove 132 and the second guide groove 114 can each have a shape that does not limit a rolling direction of the ball member B. For example, the first guide groove 132 and the second guide groove 114 can have a polygonal shape or a circular shape whose size is greater than a diameter of the ball member B.

[0073] In a non-limiting example, the ball member B can include at least three balls, and each of the first guide groove 132 and the second guide groove 114 can include a guide groove, the number of which can correspond to the number of balls included in the ball member B.

[0074] The ball member B, the first guide groove 132, and the second guide groove 114 can guide the movable body 110 so that the movable body 110 can be translated and / or rotated on the X-Y plane.

[0075] Referring to Figure 1 , the ball member B and the second guide groove 114 can be disposed on the movable body 110, and the first guide groove 132 can be disposed on the fixed body 130.

[0076] Figures 2 to 4 is a cross-sectional view illustrating a sensor actuator according to one or more embodiments.

[0077] First, referring to Figure 2 , in the sensor actuator 101 of the exemplary embodiment, the ball member B, the first guide groove 132, and the second guide groove 114 can be disposed below the movable body 110.

[0078] In addition, the infrared cut filter 140 can be disposed at a position spaced apart from the sensor substrate 112. The infrared cut filter 140 can be disposed at a certain interval from the sensor substrate 112 by the spacer 141. The spacer 141 can be continuously disposed along the periphery of the imaging surface 111a. The imaging surface 111a can be protected from the outside by the infrared cut filter 140 and the spacer 141.

[0079] Referring to Figure 3 , in the sensor actuator 102 of the exemplary embodiment, the movable body 110 can be coupled to the support substrate 150. For example, the support substrate 150 can support the sensor substrate 112 to move.

[0080] The support substrate 150 can include a movable portion 151 on which the sensor substrate 112 is seated, and a fixed portion 152 fixed to the fixed body 130. In addition, the support substrate 150 can include a deformable portion 153 that is elastically deformed as the movable body 110 moves.

[0081] The deformable portion 153 can elastically connect the movable portion 151 to the fixed portion 152.

[0082] The movable body 110 can move together with the movable portion 151 of the support substrate 150, and the deformable portion 153 can be flexibly bent as the movable body 110 moves.

[0083] Referring to Figure 4 , in the sensor actuator 103 of the exemplary embodiment, the ball member B can be disposed between the movable body 110 and the support substrate 150.

[0084] At least one of the movable body 110 and the support substrate 150 can include a guide groove 114 to accommodate at least a portion of the ball member B. For example, the guide groove 114 can be formed on one surface of the movable body 110 opposite the support substrate 150 in the direction of the optical axis (Z-axis).

[0085] In an example, the guide groove 114 can be formed in the movable body 110. However, this is merely an example, and the guide groove can also be formed in the support substrate 150. Figure 4

[0086] Figure 5 FIG. 1B is a perspective view illustrating an example in which a driver according to one or more embodiments is connected to a fixed body and a movable body. Figure 6 FIG. 2A is a plan view illustrating a second support plate according to one or more embodiments.

[0087] Figure 7 FIG. 1B is a perspective view illustrating an example in which a driver according to one or more embodiments is connected to a fixed body and a movable body. Figure 8 FIG. 1B is a perspective view illustrating an example in which a driver according to one or more embodiments is connected to a fixed body and a movable body.

[0088] Figures 9A to 11B FIG. 3 is a diagram illustrating a driving force direction of a driver according to one or more embodiments.

[0089] Referring to Figures 5 to 8 , the fixed body 130 can include a first fixed plate 131a, a second fixed plate 131b, and a first support plate 131c.

[0090] The first support plate 131c can be disposed between the first fixed plate 131a and the second fixed plate 131b, and the first fixed plate 131a, the second fixed plate 131b, and the first support plate 131c can be coupled to the housing 131.

[0091] In an example, the first fixed plate 131a and the second fixed plate 131b can be optional components, and if necessary, the first support plate 131c can be directly coupled to the housing 131 of the sensor actuator 100.

[0092] The movable body 110 can include a first sensor substrate 112a, a second sensor substrate 112b, and a second support plate 112c.

[0093] The second support plate 112c can be disposed between the first sensor substrate 112a and the second sensor substrate 112b, and the image sensor 111 can be disposed on the first sensor substrate 112a or the second sensor substrate 112b.

[0094] ​One of the first sensor substrate 112a and the second sensor substrate 112b can be an optional component, and if necessary, the movable body 110 can include only the first sensor substrate 112a and the second support plate 112c, or can include only the second sensor substrate 112b and the second support plate 112c.

[0095] The driver 120 can include a plurality of lines, and a length of the plurality of lines can change as power is applied to each of the plurality of lines. Each of the plurality of lines can have a first end coupled to the fixed body 130 and a second end coupled to the movable body 110.

[0096] For example, each of the plurality of lines can have a first end coupled to the first support plate 131c and a second end coupled to the second support plate 112c.

[0097] A substrate 131d supplying power to the plurality of lines Figure 8 may be coupled to the first support plate 131c and the second support plate 112c. For example, referring to Figure 8 , the substrate 131d can be coupled to the first support plate 131c, and one end of the plurality of lines can be fixed to the substrate 131d. Although not shown in Figure 8 , a substrate supplying power to the plurality of lines can also be coupled to the second support plate 112c.

[0098] Referring to Figure 6 , the second support plate 112c can include a main body portion 112d, a support portion 112e, and an elastic portion 112f. In an example, the main body portion 112d can have a plate shape surrounding the image sensor 111, and the support portion 112e can have a shape protruding from the main body portion 112d. The plurality of lines can be fixed to the support portion 112e. The main body portion 112d and the support portion 112e can be connected to each other by the elastic portion 112f. The elastic portion 112f can have a shape that can be bent according to a length change of the plurality of lines.

[0099] One of the first end and the second end of each line can be connected to the movable body 110 through the elastic portion 112f.

[0100] In an example embodiment, the elastic portion 112f can be a component of the movable body 110, but this is merely an example, and the elastic portion 112f can be formed on the first support plate 131c and can be provided as a component of the fixed body 130.

[0101] Referring to Figures 9A to 11B , the driver 120 can include a first line portion 121, a second line portion 122, a third line portion 123, and a fourth line portion 124.

[0102] Each of the first to fourth wire portions 121 to 124 can include a plurality of wires, the length of which can change when power is applied. For example, each of the first to fourth wire portions 121 to 124 can include two wires. In a non-limiting example, the wires can be shape memory alloys.

[0103] Each of the first to fourth wire portions 121 to 124 can have a first end fixed to the fixed body 130 and a second end fixed to the movable body 110. In addition, the second end of each wire portion can be connected to the movable body 110 through the elastic portion 112f.

[0104] Accordingly, the movable body 110 can move relative to the fixed body 130 based on the length change of each wire portion.

[0105] The first and second wire portions 121 and 122 can provide a driving force to move the movable body 110 in a first direction (X direction) parallel to the imaging surface 111a. In an example, the moving direction of the movable body 110 by the first wire portion 121 and the moving direction of the movable body 110 by the second wire portion 122 can be opposite to each other. For example, the movable body 110 can move in the -X direction based on the operation of the first wire portion 121, and the movable body 110 can move in the +X direction based on the operation of the second wire portion 122.

[0106] The third and fourth wire portions 123 and 124 can provide a driving force to move the movable body 110 in a second direction (Y direction) parallel to the imaging surface 111a. In an example, the moving direction of the movable body 110 based on the operation of the third wire portion 123 and the moving direction of the movable body 110 based on the operation of the fourth wire portion 124 can be opposite to each other. For example, the movable body 110 can move in the -Y direction based on the operation of the third wire portion 123, and the movable body 110 can move in the +Y direction based on the operation of the fourth wire portion 124.

[0107] In an example, each of the first to fourth wire portions 121 to 124 can include two wires. The first end of each wire can be connected to the fixed body 130, and the second end of each wire can be connected to the movable body 110.

[0108] The two wires 121a, 121b of the first wire portion 121 can be disposed to be spaced apart from each other in the second direction (Y direction). In addition, the two wires of the first wire portion 121 can have a shape having a length in the first direction (X direction) when viewed in the optical axis (Z axis) direction. For example, the two wires of the first wire portion 121 can extend in the +X direction from the first end toward the second end, and the second end of the two wires of the first wire portion 121 can be connected to the movable body 110 through the elastic portion 112f.

[0109] The two lines 122a, 122b of the second line portion 122 can be disposed to be spaced apart from each other in the second direction (Y direction). In addition, when viewed in the optical axis (Z axis) direction, the two lines of the second line portion 122 can have a shape having a length in the first direction (X direction). For example, the two lines of the second line portion 122 can extend from the first end toward the second end in the -X direction, and the second ends of the two lines of the second line portion 122 can be connected to the movable body 110 through the elastic portion 112f.

[0110] Therefore, when viewed in the second direction (Y direction), the first line portion 121 and the second line portion 122 can be disposed to intersect each other in an X shape.

[0111] The two lines 123a, 123b of the third line portion 123 can be disposed to be spaced apart from each other in the first direction (X direction). In addition, when viewed in the optical axis (Z axis) direction, the two lines of the third line portion 123 can have a shape having a length in the second direction (Y direction). For example, the two lines of the third line portion 123 can extend from the first end to the second end in the +Y direction, and the second ends of the two lines of the third line portion 123 can be connected to the movable body 110 through the elastic portion 112f.

[0112] The two lines 124a, 124b of the fourth line portion 124 can be disposed to be spaced apart from each other in the first direction (X direction). In addition, when viewed in the optical axis (Z axis) direction, the two lines of the fourth line portion 124 can have a shape having a length in the second direction (Y direction). For example, the two lines of the fourth line portion 124 can extend from the first end to the second end in the -Y direction, and the second ends of the two lines of the fourth line portion 124 can be connected to the movable body 110 through the elastic portion 112f.

[0113] Therefore, when viewed in the first direction (X direction), the third line portion 123 and the fourth line portion 124 can be disposed to intersect each other in an X shape.

[0114] Referring to Figure 9A When power is applied to the first line portion 121, the length of the first line portion 121 can decrease. Therefore, the movable body 110 can be pulled in the arrow direction based on the length change of the first line portion 121, and thus the movable body 110 can move in the -X direction.

[0115] In this example, the elastic portion 112f connected to each of the second ends of the second line portion 122 to the fourth line portion 124 can be elastically deformed.

[0116] Referring to Figure 9BWhen power is applied to the second wire portion 122, the length of the second wire portion 122 can decrease. Accordingly, the movable body 110 can be pulled in the arrow direction based on the length change of the second wire portion 122, and thus the movable body 110 can move in the +X direction.

[0117] In this example, the elastic portion 112f connected to each of the second ends of the first wire portion 121, the third wire portion 123, and the fourth wire portion 124 can be elastically deformed.

[0118] Referring to Figure 10A When power is applied to the third wire portion 123, the length of the third wire portion 123 can decrease. Accordingly, the movable body 110 can be pulled in the arrow direction based on the length change of the third wire portion 123, and thus the movable body 110 can move in the -Y direction.

[0119] In this example, the elastic portion 112f connected to each of the second ends of the first wire portion 121, the second wire portion 122, and the fourth wire portion 124 can be elastically deformed.

[0120] Referring to Figure 10B When power is applied to the fourth wire portion 124, the length of the fourth wire portion 124 can decrease. Accordingly, the movable body 110 can be pulled in the arrow direction based on the length change of the fourth wire portion 124, and thus the movable body 110 can move in the +Y direction.

[0121] In this example, the elastic portion 112f connected to each of the second ends of the first wire portion 121 to the third wire portion 123 can be elastically deformed.

[0122] The movable body 110 can rotate about the optical axis (Z axis) based on at least two wires that generate driving force in opposite directions.

[0123] Referring to Figure 11A and Figure 11B By applying power to one of the two wires (four wires) included in each wire portion, the movable body 110 can rotate in the clockwise direction or the counterclockwise direction.

[0124] Figure 11A and Figure 11B An example of rotating the movable body 110 by four wires is shown. However, this is merely an example, and the movable body 110 can rotate by at least two wires that generate driving force in opposite directions.

[0125] Figures 12A to 14B is a diagram showing the driving force direction of a driver according to one or more embodiments.

[0126] Referring toFigures 12A to 14B The driver 120 may include a first wire portion 121, a second wire portion 122, a third wire portion 123, a fourth wire portion 124, a fifth wire portion 125, and a sixth wire portion 126.

[0127] Each of the first wire portions 121 through the sixth wire portions 126 may include a wire whose length changes when an electric current is applied to it. In the example, the wire may be a shape memory alloy.

[0128] The first ends of the first line portion 121 to the sixth line portion 126 can be fixed to the fixed body 130, and the second ends of the first line portion 121 to the sixth line portion 126 can be fixed to the movable body 110. In addition, the second end of each line portion can be connected to the movable body 110 through the elastic portion 112f.

[0129] Therefore, the movable body 110 can move relative to the fixed body 130 based on the length variation of each line segment.

[0130] The first line portion 121 and the second line portion 122 can provide a driving force to move the movable body 110 in a first direction (X direction) parallel to the imaging plane 111a. In the example, the direction of movement of the movable body 110 based on the first line portion 121 and the direction of movement of the movable body 110 based on the second line portion 122 can be opposite to each other. For example, the movable body 110 can move in the -X direction based on the first line portion 121, and the movable body 110 can move in the +X direction via the second line portion 122.

[0131] The third line portion 123 and the fourth line portion 124 can provide a driving force to move the movable body 110 in a second direction (Y direction) parallel to the imaging plane 111a. In the example, the direction of movement of the movable body 110 based on the third line portion 123 and the direction of movement of the movable body 110 based on the fourth line portion 124 can be opposite to each other. For example, the movable body 110 can move in the -Y direction based on the third line portion 123, and the movable body 110 can move in the +Y direction via the fourth line portion 124.

[0132] When viewed along the optical axis (Z-axis), the first line portion 121 may have a shape having length in the first direction (X-direction). For example, the first line portion 121 may extend from a first end toward a second end in the +X direction, and the second end of the first line portion 121 may be connected to the movable body 110 via an elastic portion 112f.

[0133] When viewed along the optical axis (Z-axis), the second line portion 122 may have a shape having length in the first direction (X-direction). For example, the second line portion 122 may extend from the first end toward the second end in the -X direction, and the second end of the second line portion 122 may be connected to the movable body 110 via the elastic portion 112f.

[0134] Therefore, when viewed in the second direction (Y direction), the first line portion 121 and the second line portion 122 can be arranged to intersect each other in an X shape.

[0135] When viewed along the optical axis (Z-axis), the third line portion 123 may have a shape having length in the second direction (Y-direction). For example, the third line portion 123 may extend from the first end toward the second end in the +Y direction, and the second end of the third line portion 123 may be connected to the movable body 110 via the elastic portion 112f.

[0136] When viewed in the direction of the optical axis (Z-axis), the fourth line portion 124 may have a shape having length in the second direction (Y-direction). For example, the fourth line portion 124 may extend from the first end toward the second end in the -Y direction, and the second end of the fourth line portion 124 may be connected to the movable body 110 via the elastic portion 112f.

[0137] Therefore, when viewed in the first direction (X direction), the third line portion 123 and the fourth line portion 124 can be arranged to intersect each other in an X shape.

[0138] The first line portion 121 to the fourth line portion 124 can be configured to intersect with the center of the imaging surface 111a. Therefore, the first line portion 121 to the fourth line portion 124 can preferably be disposed in the space below the image sensor 111.

[0139] Reference Figure 12A When power is applied to the first line portion 121, the length of the first line portion 121 can be reduced. Therefore, the movable body 110 can be pulled in the arrow direction based on the change in the length of the first line portion 121, and thus the movable body 110 can move in the -X direction.

[0140] In this example, the elastic portion 112f connected to the second end of each of the second line portions 122 to the sixth line portions 126 can be elastically deformable.

[0141] Reference Figure 12B When power is applied to the second line portion 122, the length of the second line portion 122 can be reduced. Therefore, the movable body 110 can be pulled in the arrow direction based on the change in the length of the second line portion 122, and thus the movable body 110 can move in the +X direction.

[0142] In this example, the elastic portion 112f connected to the second end of each of the first line portion 121, the third line portion 123 to the sixth line portion 126 can be elastically deformable.

[0143] Reference Figure 13A When power is applied to the third line portion 123, the length of the third line portion 123 can be reduced. Therefore, the movable body 110 can be pulled in the arrow direction based on the change in the length of the third line portion 123, and thus the movable body 110 can move in the -Y direction.

[0144] In this example, the elastic portion 112f connected to the second end of each of the first line portion 121, the second line portion 122, the fourth line portion 124 to the sixth line portion 126 can be elastically deformable.

[0145] Reference Figure 13B When power is applied to the fourth line portion 124, the length of the fourth line portion 124 can be reduced. Therefore, the movable body 110 can be pulled in the arrow direction based on the change in the length of the fourth line portion 124, and thus the movable body 110 can move in the +Y direction.

[0146] In this example, the elastic portion 112f connected to the second end of each of the first line portion 121 to the third line portion 123, the fifth line portion 125 and the sixth line portion 126 can be elastically deformable.

[0147] Reference Figure 14A and Figure 14B The movable body 110 can rotate based on the fifth line portion 125 and the sixth line portion 126. For example, the movable body 110 can rotate clockwise based on the fifth line portion 125 and counterclockwise based on the sixth line portion 126.

[0148] When viewed along the optical axis (Z-axis), the fifth line portion 125 and the sixth line portion 126 can have a shape having length in the first direction (X-direction). For example, the fifth line portion 125 and the sixth line portion 126 can extend from the first end to the second end in the +X direction, and the second end of the fifth line portion 125 and the sixth line portion 126 can be connected to the movable body 110 via an elastic portion 112f. Alternatively, the fifth line portion 125 and the sixth line portion 126 can extend from the first end to the second end in the -X direction.

[0149] The fifth line portion 125 and the sixth line portion 126 may be spaced apart from each other in a direction parallel to the imaging plane 111a. Figure 14A and Figure 14BAn example is shown where the fifth line portion 125 and the sixth line portion 126 can be spaced apart in a second direction (Y direction). However, this is merely an example, and the fifth line portion 125 and the sixth line portion 126 can also be spaced apart from each other in a first direction (X direction).

[0150] However, since the image sensor 111 has a rectangular shape, the fifth line portion 125 and the sixth line portion 126 can have a length along the short side of the image sensor 111 and can be spaced apart from each other along the long side of the image sensor 111.

[0151] Figure 15 This is a diagram showing the configuration of the position sensing section. Figure 16 This is a diagram illustrating the sensing yoke portion and sensing coil of a position sensing portion according to one or more embodiments.

[0152] Reference Figure 1 , Figure 15 and Figure 16 The sensor actuator 100 according to an exemplary embodiment may also include a position sensing portion 160.

[0153] For example, when the image sensor 111 moves in the first direction (X direction), the position of the image sensor 111 can be detected by the position sensing part 160, and when the image sensor 111 moves in the second direction (Y direction), the position of the image sensor 111 can be detected by the position sensing part 160.

[0154] The position sensing unit 160 may include a first position sensor 170 and a second position sensor 180. The first position sensor 170 can be used to detect the position of the image sensor 111 in a first direction (X direction), and the second position sensor 180 can be used to detect the position of the image sensor 111 in a second direction (Y direction).

[0155] The first position sensor 170 may include a first sensing coil 172 and a first sensing yoke portion 171. One of the first sensing coil 172 and the first sensing yoke portion 171 may be disposed on the movable body 110, and the other may be disposed on the fixed body 130. In an exemplary embodiment, the first sensing yoke portion 171 may be disposed on the housing 131, and the first sensing coil 172 may be disposed on the sensor substrate 112. Therefore, the first sensing coil 172 may be a movable component that moves together with the image sensor 111.

[0156] The first sensing coil 172 and the first sensing yoke portion 171 can be configured to be opposite each other in the optical axis (Z-axis) direction.

[0157] The first sensing yoke portion 171 may include a first sensing yoke 171a and a second sensing yoke 171b spaced apart from each other.

[0158] The second position sensor 180 may include a second sensing coil 182 and a second sensing yoke portion 181. One of the second sensing coil 182 and the second sensing yoke portion 181 may be disposed on the movable body 110, and the other may be disposed on the fixed body 130. In an exemplary embodiment, the second sensing yoke portion 181 may be disposed on the housing 131, and the second sensing coil 182 may be disposed on the sensor substrate 112. Therefore, the second sensing yoke portion 181 may be a movable member that moves together with the image sensor 111.

[0159] The second sensing coil 182 and the second sensing yoke portion 181 can be configured to be opposite each other in the optical axis (Z-axis) direction.

[0160] The second sensing yoke portion 181 may include a third sensing yoke 181a and a fourth sensing yoke 181b spaced apart from each other.

[0161] Since the configuration and sensing method of the first position sensor 170 and the second position sensor 180 are the same, only the first position sensor 170 will be described for ease of description.

[0162] The inductance of the first sensing coil 172 can vary depending on the position of the first sensing yoke portion 171 that is opposite to it.

[0163] Specifically, when the relative position of the first sensing coil 172 and the first sensing yoke portion 171 changes, the magnitude of the eddy current in the first sensing yoke portion 171 that affects the inductance of the first sensing coil 172 can change, the strength of the magnetic field can change according to the eddy current, and therefore, the inductance of the first sensing coil 172 can change.

[0164] The first sensing yoke portion 171 can be a conductor or a magnetic material.

[0165] The sensor actuator 100 can determine the displacement of the image sensor 111 based on the change in inductance of the first sensing coil 172. For example, the sensor actuator 100 may additionally include at least one capacitor, and the at least one capacitor and the first sensing coil 172 may form a predetermined oscillation circuit.

[0166] For example, at least one capacitor can be configured to correspond to the number of the first sensing coil 172, and the capacitor and the first sensing coil 172 can be configured as a predetermined LC oscillator. Alternatively, at least one capacitor and the first sensing coil 172 can be configured as a known Colpitts oscillator.

[0167] The sensor actuator 100 can determine the displacement of the image sensor 111 based on the change in frequency of the oscillation signal generated by the oscillation circuit. Specifically, when the inductance of the first sensing coil 172 forming the oscillation circuit changes, the frequency of the oscillation signal generated by the oscillation circuit can change, so that the displacement of the image sensor 111 can be detected based on the change in frequency.

[0168] Reference Figure 16 The first sensing yoke portion 171 may include a first sensing yoke 171a and a second sensing yoke 171b.

[0169] In an exemplary embodiment, the first sensing yoke portion 171 may further include a support member 171c, with the first sensing yoke 171a and the second sensing yoke 171b disposed on the support member 171c. The support member 171c may be attached to the housing 131.

[0170] By way of example only, the first sensing yoke 171a and the second sensing yoke 171b may be attached to the support member 171c, or the first sensing yoke 171a and the second sensing yoke 171b may be integrated with the support member 171c by an insertion injection method.

[0171] However, the exemplary embodiments therein are not limited thereto, and the first sensing yoke portion 171 may not include the support member 171c. In this example, the first sensing yoke 171a and the second sensing yoke 171b may be directly attached to the housing 131, or the first sensing yoke 171a and the second sensing yoke 171b may be integrated with the housing 131 by an insertion injection method.

[0172] The first sensing yoke 171a and the second sensing yoke 171b can be configured to be spaced apart from each other in the second direction (Y direction). Additionally, each sensing yoke can be configured to be opposite a portion of the first sensing coil 172. For example, the first sensing yoke 171a and the second sensing yoke 171b can be configured to be opposite the first sensing coil 172 in the optical axis (Z-axis) direction.

[0173] The direction of the current flowing in the portion of the first sensing coil 172 opposite to the first sensing yoke 171a may be different from the direction of the current flowing in the portion of the first sensing coil 172 opposite to the second sensing yoke 171b. In an exemplary embodiment, the direction of the current flowing in the portion of the first sensing coil 172 opposite to the first sensing yoke 171a may be opposite to the direction of the current flowing in the portion of the first sensing coil 172 opposite to the second sensing yoke 171b.

[0174] The distance between the first sensing yoke 171a and the second sensing yoke 171b in the second direction (Y direction) can be shorter than the distance between the two ends of the first sensing coil 172 in the second direction (Y direction).

[0175] Each of the first sensing yoke 171a and the second sensing yoke 171b may have a width that varies according to the coordinates of the direction in which the image sensor 111 moves (e.g., the X direction).

[0176] The first sensing yoke 171a and the second sensing yoke 171b can each output magnetic flux due to eddy currents. The magnitude of the eddy currents and the magnitude of the magnetic flux can be correlated with each other.

[0177] The magnitude of the eddy currents formed in each of the first sensing yoke 171a and the second sensing yoke 171b can depend on the width of the portion of the first sensing yoke 171a and the second sensing yoke 171b opposite to the first sensing coil 172.

[0178] For example, since the first sensing coil 172 can move relative to the first sensing yoke 171a and the second sensing yoke 171b in a first direction (X direction), the magnitude of the eddy currents formed in each of the first sensing yoke 171a and the second sensing yoke 171b can depend on the relative movement of the first sensing coil 172 in the first direction (X direction).

[0179] Since the inductance of the first sensing coil 172 can be the sum of the magnetic flux of the first sensing coil 172 and the mutual inductance caused by its self-inductance, or the difference between them, the inductance can vary according to the magnitude of the magnetic flux caused by eddy currents. The position of the image sensor 111 can be detected based on the inductance of the first sensing coil 172.

[0180] Since the magnitudes of the eddy currents in the first sensing yoke 171a and the second sensing yoke 171b change linearly with the displacement of the image sensor 111, the position of the image sensor 111 can be accurately detected.

[0181] Each of the first sensing yoke 171a and the second sensing yoke 171b may have a shape in which the width can be repeatedly increased or decreased in the direction in which the image sensor 111 moves (e.g., the X direction). The width may refer to the width in a second direction (Y direction).

[0182] In the example, the first sensing yoke 171a may have a shape in which the width can decrease, increase, decrease, and increase in a first direction (X direction). The second sensing yoke 171b may have a shape in which the width can repeatedly decrease, increase, decrease, increase, and decrease in the first direction (X direction).

[0183] Each of the first sensing yoke 171a and the second sensing yoke 171b may have a shape in which the width increases or decreases in one direction, and the positions in which the width increases or decreases of the first sensing yoke 171a and the second sensing yoke 171b may have different shapes from each other.

[0184] Each of the first sensing yoke 171a and the second sensing yoke 171b may have multiple minimum widths and multiple maximum widths.

[0185] The boundary lines defining the width of each sensing yoke can have a sinusoidal shape.

[0186] The winding thickness of the first sensing coil 172 can be greater than the minimum width of each sensing yoke and less than the maximum width of each sensing yoke.

[0187] The position where the first sensing yoke 171a has its minimum width may differ from the position where the second sensing yoke 171b has its minimum width. Furthermore, the position where the first sensing yoke 171a has its maximum width may differ from the position where the second sensing yoke 171b has its maximum width.

[0188] Therefore, the coordinates of the image sensor 111 corresponding to the maximum width of the first sensing yoke 171a in one direction (e.g., the X direction) (maximum width in the second direction (Y direction)) and the coordinates of the image sensor 111 corresponding to the maximum width of the second sensing yoke 171b in one direction (e.g., the X direction) (maximum width in the second direction (Y direction)) can be different.

[0189] For example, the coordinates of the image sensor 111 in the X direction corresponding to the minimum width W1 of the first sensing yoke 171a and the coordinates of the image sensor 111 in the X direction corresponding to the minimum width of the second sensing yoke 171b can be different from each other, and the coordinates of the image sensor 111 in the X direction corresponding to the maximum width W2 of the first sensing yoke 171a and the coordinates of the image sensor 111 in the X direction corresponding to the maximum width of the second sensing yoke 171b can be different from each other.

[0190] Therefore, the effect of the displacement of the first sensing yoke 171a in one direction according to the relative movement of the first sensing coil 172 in the eddy current magnitude change pattern of the first sensing yoke 171a and the effect of the displacement of the second sensing yoke 171b in one direction according to the relative movement of the first sensing coil 172 in the eddy current magnitude change pattern of the second sensing yoke 171b can complement each other.

[0191] Therefore, the inductance of the first sensing coil 172 can be stably varied based on the integral of the inductance variation factor based on the change in the magnitude of the eddy currents of the first sensing yoke 171a and the inductance variation factor based on the change in the magnitude of the eddy currents of the second sensing yoke 171b, and the sensor actuator 100 according to the exemplary embodiment can stably and / or accurately, and also linearly and / or effectively detect the movement of the image sensor 111.

[0192] The length of the first sensing yoke 171a in the first direction (X direction) may be one or more cycles of the width period of the first sensing yoke 171a, and the length of the second sensing yoke 171b in the first direction (X direction) may be one or more cycles of the width period of the second sensing yoke 171b.

[0193] The width of each of the first sensing yoke 171a and the second sensing yoke 171b can repeat per cycle. The length of the width cycle of each of the first sensing yoke 171a and the second sensing yoke 171b in the first direction (X direction) can vary according to the motion sensing range of the image sensor 111.

[0194] Because of the difference between the coordinates of the image sensor 111 in one direction (e.g., the X direction) corresponding to the maximum width of the first sensing yoke 171a and the coordinates of the image sensor 111 in one direction (e.g., the X direction) corresponding to the maximum width of the second sensing yoke 171b, the output value of the first sensing coil 172, depending on the movement of each sensing yoke, can be a sine wave with a 90-degree phase difference.

[0195] Therefore, the shift of the output value relative to the image sensor 111 obtained by arctangent processing of the output of a sine wave with a 90-degree phase difference can be linear.

[0196] By way of example only, each of the first sensing yoke 171a and the second sensing yoke 171b may include at least one of copper, silver, gold, and aluminum. Since copper, silver, gold, and aluminum have relatively high conductivity, the total magnitude of the eddy currents formed in the first sensing yoke 171a and the second sensing yoke 171b according to the magnetic flux of the first sensing coil 172 can be increased, and the motion sensing sensitivity of the image sensor 111 can be further improved.

[0197] In an exemplary embodiment, the first sensing coil 172 may include multiple sensing coils, with inductance variation factors based on changes in the eddy current magnitude of the first sensing yoke 171a and changes in the eddy current magnitude of the second sensing yoke 171b respectively applied to the multiple sensing coils. In this example, the first sensing yoke 171a and the second sensing yoke 171b may be configured to be opposite to different sensing coils.

[0198] Since the inductance of each of the multiple sensing coils is used together to generate information about the movement of the image sensor 111, the inductance variation factor based on the change in the eddy current magnitude of the first sensing yoke 171a and the inductance variation factor based on the change in the eddy current magnitude of the second sensing yoke 171b can be used as a whole, and the sensor actuator 100 in the exemplary embodiment can linearly sense the movement of the image sensor 111.

[0199] Figure 17A and Figure 17B It is a diagram showing the change in the positional relationship between the first sensing yoke portion and the first sensing coil according to one or more embodiments.

[0200] Reference Figure 17A and Figure 17B Since the width of the first sensing yoke portion 171 can vary in the direction of movement of the image sensor 111, the area where the first sensing yoke portion 171 and the first sensing coil 172 overlap in the optical axis (Z axis) direction can change when the image sensor 111 moves.

[0201] The widths of the portions of the first sensing yoke 171a and the second sensing yoke 171b that overlap with the first sensing coil 172 in the optical axis (Z-axis) direction can vary depending on the movement of the image sensor 111 in the first direction (X-direction). Therefore, the inductance of the first sensing coil 172 can vary depending on the movement of the image sensor 111 in the first direction (X-direction), and the movement of the image sensor 111 in the first direction (X-direction) can be sensed.

[0202] Figure 18 It is a graph showing the inductance of the first sensing coil according to the movement of the image sensor in one direction.

[0203] Reference Figure 18 The period of the width of the first sensing yoke 171a can correspond to a 360-degree phase.

[0204] The normalized inductance of the first sensing coil 172 can have a maximum value when a specific region of the first sensing coil 172 (e.g., the center of the first sensing coil 172) overlaps with the minimum width of the first sensing yoke 171a.

[0205] The normalized inductance of the first sensing coil 172 can have a minimum value when a specific region of the first sensing coil 172 (e.g., the center of the first sensing coil 172) overlaps with the maximum width of the first sensing yoke 171a.

[0206] In the example, the normalized inductance can be a value that applies a specific weight to the inductance.

[0207] Figure 19A It is a graph showing multiple inductance levels of a first sensing coil corresponding to a first sensing yoke and a second sensing yoke of a sensor actuator, according to one or more embodiments.

[0208] Reference Figure 19A The phase difference between the first inductance L1 of the first sensing coil 172 corresponding to the first sensing yoke 171a and the second inductance L2 of the first sensing coil 172 corresponding to the second sensing yoke 171b can be 90 degrees. In the example, the inductance can be a value obtained by subtracting a specific value from the standardized inductance so that the average value becomes 0.

[0209] Figure 19B It is shown Figure 19A The graph shows the arctangent values ​​for multiple inductance levels.

[0210] Reference Figure 19B The arctangent processing value can change linearly with the phase.

[0211] When the first inductor L1 and the second inductor L2 have a 90-degree phase difference, one of the first inductor L1 and the second inductor L2 can correspond to sin(phase) and the other can correspond to cos(phase).

[0212] In the trigonometric function model, the angle from the origin to a point on the circle can correspond to the phase of one cycle of the sensing yoke, the distance from the origin to a point on the circle can be r, and the X-direction vector value and Y-direction vector value from the origin to a point on the circle can be X and Y, respectively.

[0213] sin(phase) can be y / r, cos(phase) can be x / r. tan(phase) can be y / x, satisfying sin(phase) / cos(phase), and also satisfying the second inductance / first inductance.

[0214] Therefore, arctan(second inductance / first inductance) can correspond to the phase of one cycle of the displacement recognition layer and can be an arctangent value.

[0215] Figure 20 This is a cross-sectional view showing a camera module 10 according to one or more embodiments.

[0216] Reference Figure 20 In an exemplary embodiment, the camera module 10 may include a lens module 200, a housing 300, and a sensor actuator 100.

[0217] At least one lens for imaging an object can be housed in the lens module 200. When multiple lenses are arranged in the lens module 200, the multiple lenses can be arranged along the optical axis (Z-axis) in the lens module 200.

[0218] In the example, the lens module 200 may have a hollow cylindrical shape.

[0219] In another exemplary embodiment, the lens module 200 may include a lens barrel and a lens holder. In this example, at least one lens may be housed in the lens barrel, and the lens barrel may be coupled to the lens holder.

[0220] The lens module 200 can be housed in the housing 300. Additionally, the housing 300 can be connected to the housing 131 of the sensor actuator 100.

[0221] The sensor actuator can be the sensor actuator 100, 101, 102 or 103 described in the above exemplary embodiments.

[0222] Image sensor 111 can be disposed in sensor actuator 100, and image sensor 111 can move in a first direction (X direction) and a second direction (Y direction) based on the operation of driver 120, and can rotate about optical axis (Z axis) as rotation axis.

[0223] Therefore, optical image stabilization can be performed based on the movement of the image sensor 111.

[0224] In the exemplary embodiment, camera module 10 performs optical image stabilization by moving image sensor 111 instead of moving lens module 200. Since the image sensor 111, which has a relatively light weight, is moved, it can be moved with less driving force. Therefore, camera module 10 can have a reduced size.

[0225] The lens module 200 can move relative to the housing 300 in the optical axis (Z-axis) direction. Therefore, the focus can be adjusted by moving the lens module 200 in the optical axis (Z-axis) direction.

[0226] The focus adjustment driver may include a magnet 210 and a coil 230 that generate driving force in the optical axis (Z-axis) direction. The magnet 210 may be attached to the lens module 200, and the coil 230 may be mounted on the housing 300 opposite to the magnet 210. A substrate for supplying power to the coil 230 may be disposed in the housing 300. The coil 230 may be disposed on one surface of the substrate.

[0227] When power is applied to coil 230, lens module 200 can move in the direction of optical axis (Z axis) by the electromagnetic force between magnet 210 and coil 230.

[0228] When the lens module 200 moves, the ball component B can be disposed between the lens module 200 and the housing 300 to reduce friction between the lens module 200 and the housing 300. The ball component B may include multiple balls.

[0229] The guide groove portion for accommodating the ball component B can be formed on at least one surface of the lens module 200 and the housing 300 that is opposite to each other in a direction perpendicular to the optical axis (Z axis).

[0230] The ball component B can be accommodated in the guide groove portion and can be inserted into the area between the lens module 200 and the housing 300.

[0231] The yoke can be positioned opposite the magnet 210 in a direction perpendicular to the optical axis (Z-axis). For example, the yoke can be positioned on the other surface of the substrate or on the other surface of the coil 230. Thus, the yoke can be positioned opposite the magnet 210, and the coil 230 can be inserted between the yoke and the magnet 210.

[0232] The attractive force can act between the yoke and the magnet 210 in a direction perpendicular to the optical axis (Z-axis).

[0233] Therefore, the spherical component B can be kept in contact with the lens module 200 and the housing 300 by the attraction between the yoke and the magnet 210.

[0234] A position sensor opposite to magnet 210 can be mounted on a substrate.

[0235] exist Figure 20 In this embodiment, the ball member B can be disposed on the opposite side of the magnet 210. However, exemplary embodiments of the ball member B are not limited thereto, and the ball member B can be disposed in contact with the lens module 200, and the housing 300 can be held in place by the attraction between the magnet 210 and the yoke.

[0236] Figure 21 This is a cross-sectional view showing a camera module 20 according to one or more embodiments.

[0237] Reference Figure 21 In the example, camera module 20 may include housing 300, reflection module R, lens module 200, and sensor actuator 100.

[0238] In an exemplary embodiment, the optical axis (Z-axis) of the lens module 200 may point in a direction perpendicular to the thickness direction of the portable electronic device (from the front surface to the rear surface of the portable electronic device, or from the rear surface to the front surface of the portable electronic device).

[0239] In the example, the optical axis (Z-axis) of the lens module 200 can be formed in the width or length direction of the portable electronic device.

[0240] The thickness of a portable electronic device may increase when components included in a camera module are stacked in the thickness direction of the portable electronic device.

[0241] However, in the camera module 20 of the exemplary embodiment, since the optical axis (Z-axis) of the lens module 200 is formed in the width or length direction of the portable electronic device, the thickness of the portable electronic device can be reduced.

[0242] The reflection module R and the lens module 200 can be housed in the housing 300. Alternatively, the reflection module R and the lens module 200 can be housed in different housings, and the housings can be combined with each other.

[0243] The reflection module R can be configured to change the direction of light travel. For example, the direction of light incident into the housing 300 can be changed by the reflection module R to be guided to the lens module 200. The reflection module R can be a mirror or prism that reflects light.

[0244] The sensor actuator 100 can be connected to the housing 300.

[0245] The sensor actuator can be the sensor actuator 100, 101, 102 or 103 described in the above exemplary embodiments.

[0246] The image sensor 111 can be disposed in the sensor actuator 100, and the image sensor 111 can move in a first direction (X direction) and a second direction (Y direction), or can rotate about the optical axis (Z axis) as a rotation axis.

[0247] Therefore, optical image stabilization can be performed based on the movement of the image sensor 111.

[0248] The lens module 200 can move relative to the housing 300 in the optical axis (Z-axis) direction. Therefore, the focus can be adjusted by moving the lens module 200 in the optical axis (Z-axis) direction.

[0249] Due to the configuration and reference of the driver used for focus adjustment Figure 20 The configuration of the focus adjustment driver described is the same, so its detailed description will not be provided.

[0250] According to the exemplary embodiments described above, the sensor actuator and the camera module including the sensor actuator can improve optical image stabilization performance.

[0251] While this disclosure includes specific examples, it will be apparent to those skilled in the art, 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 limiting purposes. 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 different ways and / or replaced or supplemented by other components or their equivalents. Therefore, the scope of this disclosure is not limited by the specific embodiments but by the claims and their equivalents, and all variations within the scope of the claims and their equivalents should be understood to be included in this disclosure.

Claims

1. A sensor actuator comprising: a movable body including a sensor substrate on which an image sensor having an imaging face is disposed; a fixed body configured to accommodate the movable body; and a driver configured to provide a driving force to move the image sensor, wherein the driver includes a first wire portion, a second wire portion, a third wire portion, and a fourth wire portion, wherein each of the first wire portion to the fourth wire portion includes two wires, and the two wires have lengths that vary when power is applied, wherein each of the two wires is configured to have a first end coupled to the fixed body and a second end coupled to the movable body, and wherein one of the first end and the second end of each of the two wires is connected to the fixed body or the movable body through an elastic portion. 2.The sensor actuator according to claim 1, the fixed body includes a first support plate, and the movable body includes a second support plate, and wherein, wherein the elastic portion is disposed on one of the first support plate and the second support plate. 3.The sensor actuator according to claim 1, each of the first wire portion to the fourth wire portion is configured to fix the first end to the fixed body and fix the second end to the movable body. wherein 4.The sensor actuator according to claim 3, each of the first wire portion and the second wire portion is configured to provide a driving force to move the movable body in a first direction parallel to the imaging face, and wherein wherein a moving direction of the movable body based on operation of the first wire portion and a moving direction of the movable body based on operation of the second wire portion are opposite to each other. 5.The sensor actuator according to claim 4, when power is applied to one of the first wire portion and the second wire portion, a length of the one of the first wire portion and the second wire portion decreases, and wherein wherein the elastic portion connected to wire portions other than the one of the first wire portion and the second wire portion among the first wire portion to the fourth wire portion elastically deforms. 6.The sensor actuator according to claim 4, each of the third wire portion and the fourth wire portion is configured to provide a driving force to move the movable body in a second direction parallel to the imaging face, and wherein, wherein a moving direction of the movable body based on operation of the third wire portion and a moving direction of the movable body based on operation of the fourth wire portion are opposite to each other. 7.The sensor actuator according to claim 6, when power is applied to one of the third wire portion and the fourth wire portion, a length of the one of the third wire portion and the fourth wire portion decreases, and wherein, wherein the elastic portion connected to wire portions other than the one of the third wire portion and the fourth wire portion among the first wire portion to the fourth wire portion elastically deforms. ​ 8. The sensor actuator of claim 6, wherein, The movable body is configured to be rotated by at least two wires configured to generate driving forces in opposite directions.

9. The sensor actuator of claim 3, wherein each of the first wire portion and the second wire portion is configured to provide a driving force to move the movable body in a first direction parallel to the imaging plane, wherein the two wires of the first wire portion and the two wires of the second wire portion are spaced apart from each other in a second direction parallel to the imaging plane, and wherein the first direction and the second direction are perpendicular to each other.

10. The sensor actuator of claim 9, wherein each of the third wire portion and the fourth wire portion is configured to provide a driving force to move the movable body in the second direction, and wherein the two wires of the third wire portion and the two wires of the fourth wire portion are spaced apart from each other in the first direction.

11. The sensor actuator of claim 1, wherein, A ball member configured to support movement of the movable body is provided between the movable body and the fixed body.

12. The sensor actuator of claim 1, further comprising: a support substrate configured to support movement of the movable body, wherein the support substrate includes a deformable portion that elastically deforms with movement of the movable body.

13. The sensor actuator of claim 12, wherein the support substrate further includes a movable portion on which the movable body is provided and a fixed portion coupled to the fixed body, and wherein the deformable portion elastically connects the movable portion to the fixed portion.

14. The sensor actuator of claim 1, further comprising: a position sensing portion configured to sense a position of the image sensor and including a sensing coil provided on one of the movable body and the fixed body and a sensing yoke portion provided on the other of the movable body and the fixed body, wherein the sensing yoke portion includes a plurality of sensing yokes spaced apart from each other in a direction parallel to the imaging plane, and wherein each sensing yoke is configured to have a width that varies in a direction of movement of the image sensor.

15. The sensor actuator of claim 14, wherein the plurality of sensing yokes includes a first sensing yoke and a second sensing yoke, wherein each of the first sensing yoke and the second sensing yoke opposes the sensing coil in a direction perpendicular to the imaging plane, and wherein each of the first sensing yoke and the second sensing yoke has a width that increases and decreases in the direction of movement of the image sensor, and the first sensing yoke and the second sensing yoke have shapes different from each other in positions where the width increases or decreases.

16. A camera module, comprising: a lens module including a lens barrel and at least one lens accommodated in the lens barrel; a housing configured to accommodate the lens module; a first driver configured to move the lens module in an optical axis direction; a fixed body coupled to the housing; a movable body accommodated in the fixed body and including an image sensor disposed in the movable body; a second driver configured to provide a driving force to move the image sensor in a first direction and a second direction perpendicular to a direction of the optical axis, wherein the second driver includes a first wire portion, a second wire portion, a third wire portion, and a fourth wire portion, wherein each of the first wire portion to the fourth wire portion includes two wires, and the two wires have lengths that vary when power is applied, wherein each of the two wires is configured to have a first end coupled to the fixed body and a second end coupled to the movable body, and wherein one of the first end and the second end of each of the two wires is connected to the fixed body or the movable body through an elastic portion.

17. An electronic device, comprising: a camera module, comprising: a movable body including a sensor substrate on which an image sensor is disposed; a fixed body configured to accommodate the movable body; a driver configured to provide a driving force to move the image sensor, the driver including: a wire portion including a first end coupled to the fixed body and a second end coupled to the movable body, and configured to provide a driving force to move the movable body in a first direction and a second direction parallel to an imaging surface of the image sensor, and configured to rotate the movable body about an optical axis, wherein each of the wire portions has a length that varies when power is applied, wherein the wire portion includes a first wire portion, a second wire portion, a third wire portion, and a fourth wire portion, and wherein each of the first wire portion to the fourth wire portion includes two wires. 18.The electronic device of claim 17, wherein, Each of the wire portions is a shape memory alloy. 19.The electronic device of claim 17, wherein, the first direction includes directions opposite to each other, the second direction includes directions opposite to each other, and the first direction is perpendicular to the second direction.

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