Sensor shift actuator and camera module

Abstract

The present disclosure relates to a sensor shift actuator including a sensor substrate on which an image sensor having an imaging surface is disposed, a base configured to accommodate the sensor substrate, and a driver configured to drive the image sensor in a first direction and a second direction parallel to the imaging surface. The sensor substrate includes a movable portion on which the image sensor is disposed, a fixed portion connected to the base, and a connection portion disposed between the movable portion and the fixed portion. Depending on a moving direction of the image sensor in the first direction or the second direction, the movable portion and the connection portion relatively move with respect to the fixed portion, or the movable portion relatively moves with respect to the connection portion. The present disclosure also relates to a camera module including the sensor shift actuator.

Description

[0001] Cross-references to related applications

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2021-0190121, filed on December 28, 2021, 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 camera module having a sensor shift actuator. Background Technology

[0004] Camera modules are now used in mobile communication terminals such as smartphones, tablet PCs, and laptops.

[0005] Camera modules typically include actuators with focus adjustment and shake correction capabilities to produce high-resolution images.

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

[0007] However, recently, with improvements in camera module performance, the weight of lens modules has also increased, and there is also the impact of the weight of the drivers used to move the lens modules. Therefore, accurately controlling the driving force for shake correction can be difficult. 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 one general aspect, a sensor displacement actuator includes: a sensor substrate on which an image sensor having an imaging surface is disposed; a base configured to house the sensor substrate; and a driver configured to drive the image sensor in a first direction and a second direction parallel to the imaging surface. The sensor substrate includes a movable portion on which the image sensor is disposed, a fixed portion connected to the base, and a connecting portion disposed between the movable portion and the fixed portion. Depending on the direction of movement of the image sensor, the movable portion and the connecting portion move relative to the fixed portion, or the movable portion moves relative to the connecting portion.

[0010] The sensor substrate can further include a first bridge configured to connect the fixed portion and the connection portion to each other in a first direction, and a second bridge configured to connect the movable portion and the connection portion to each other in a second direction. Each of the first bridge and the second bridge can include a plurality of bridge elements. The first direction and the second direction can be orthogonal to each other. Each of the bridge elements can extend in a connection direction.

[0011] The first bridge can be elastically deformed when the image sensor moves in the first direction, and the second bridge can be elastically deformed when the image sensor moves in the second direction.

[0012] Each of the bridge elements can have a width and a height, and the width can be less than the height. The width can extend in a direction orthogonal to a length direction of each of the bridge elements in a plane parallel to the imaging surface. The height can extend in a direction orthogonal to the imaging surface.

[0013] Each of the bridge elements can include a bridge portion and a trace portion disposed at one end of the bridge portion. A signal of the image sensor can be transmitted to an outside of the image sensor through the trace portion.

[0014] The sensor shift actuator can further include a bracket coupled to the movable portion. The driver can include a coil portion disposed on one of the bracket and the base, and a movable yoke portion disposed on the other of the bracket and the base. The movable yoke portion can be formed of a soft magnetic material magnetized by a magnetic field of the coil portion.

[0015] The coil portion and the movable yoke portion can be disposed opposite to each other in a direction parallel to the imaging surface.

[0016] An upper surface of the movable portion can be higher than upper surfaces of the fixed portion and the connection portion in a direction orthogonal to the imaging surface.

[0017] The driver can include a coil portion disposed on one of the movable portion and the base, and a magnet portion disposed on the other of the movable portion and the base. The coil portion and the magnet portion can be disposed opposite to each other in a direction orthogonal to the imaging surface.

[0018] The connection portion can be configured to surround the movable portion, and the fixed portion is configured to surround the connection portion. The coil portion and the magnet portion can be located in a space between the fixed portion and the connection portion when viewed in a direction orthogonal to the imaging surface.

[0019] The sensor shift actuator can further include a position sensor portion configured to sense a position of the image sensor, the position sensor portion including a sense coil disposed on one of the movable portion and the base, and a sense yoke portion disposed on the other of the movable portion and the base. The sense yoke portion can include a plurality of sense yokes spaced apart from each other in a direction parallel to the imaging plane. A width of each of the sense yokes can be configured to vary in a direction of movement of the image sensor.

[0020] The plurality of sense yokes can include a first sense yoke and a second sense yoke. Each of the first sense yoke and the second sense yoke can oppose the sense coil in a direction orthogonal to the imaging plane.

[0021] Each of the first sense yoke and the second sense yoke can have a width that increases or decreases in the direction of movement of the image sensor. The first sense yoke and the second sense yoke have different shapes from each other in terms of positions of the increasing or decreasing width.

[0022] Each of the first sense yoke and the second sense yoke can have an hourglass shape. The first sense yoke and the second sense yoke can be spaced apart from each other offset.

[0023] The hourglass shape of the first sense yoke and the second sense yoke can be different in size.

[0024] In another general aspect, a camera module includes a lens module including at least one lens, a housing configured to accommodate the lens module, a focus adjustment driver configured to move the lens module in an optical axis direction, a sensor substrate having an image sensor disposed thereon, a base coupled to the housing, the base configured to accommodate the sensor substrate, and a shake correction driver configured to drive the image sensor in a first direction and a second direction orthogonal to the optical axis direction. The sensor substrate includes a movable portion configured to move with the image sensor in the first direction and the second direction, a fixed portion coupled to the base, and a connection portion disposed between the movable portion and the fixed portion. The connection portion is configured to move with the movable portion in the first direction or the second direction.

[0025] The sensor substrate can further include a first bridge portion configured to connect the fixed portion and the connection portion to each other in the second direction, and a second bridge portion configured to connect the movable portion and the connection portion to each other in the first direction. Each of the first bridge portion and the second bridge portion can include at least one electrical trace configured to transmit a signal to an outside of the image sensor.

[0026] The camera module can further include a reflection member disposed in front of the lens module, the reflection member can be configured to change a path of incident light to the lens module.

[0027] Other features and aspects will become apparent from the associated claims, the drawings, and the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a schematic cross-sectional view of a sensor shift actuator according to an exemplary embodiment of the present disclosure.

[0029] Figure 2 is a diagram showing an example in which a connection between an image sensor and a sensor substrate in Figure 1 is changed.

[0030] Figure 3 is a plan view of a sensor substrate according to an exemplary embodiment.

[0031] Figures 4A-4D shows a state in which the sensor substrate is deformed according to movement of the image sensor.

[0032] Figure 5 is a schematic plan view of a sensor shift actuator according to an exemplary embodiment of the present disclosure.

[0033] Figures 6A-6D schematically shows a state in which the image sensor moves.

[0034] Figure 7A shows an example in which the position sensor portion is further included in the sensor shift actuator.

[0035] Figure 7B is a diagram showing a schematic configuration of a position sensor portion, and Figure 8 is a diagram showing a sensing magnetic yoke portion and a sensing coil of the position sensor portion according to an exemplary embodiment.

[0036] Figure 9A and Figure 9B is a diagram showing a change in a positional relationship between a first sensing magnetic yoke portion and a first sensing coil in the position sensor portion according to movement of the image sensor according to an exemplary embodiment.

[0037] Figure 10 is a graph showing inductance of the first sensing coil according to movement of the image sensor in one direction.

[0038] Figure 11A is a graph showing a plurality of inductances of the first sensing coil corresponding to a first sensing magnetic yoke and a second sensing magnetic yoke of the sensor shift actuator, respectively, according to an exemplary embodiment of the present disclosure.

[0039] Figure 11B is a graph showing Figure 11AA plot of the inverse tangent processed values of the plurality of inductances.

[0040] Figure 12 is a schematic cross-sectional view of a sensor shift actuator according to another exemplary embodiment of the present disclosure.

[0041] Figure 13 is a schematic cross-sectional view of a sensor shift actuator according to another exemplary embodiment of the present disclosure.

[0042] Figure 14 is a schematic cross-sectional view of a camera module according to an exemplary embodiment of the present disclosure.

[0043] Figure 15 is a schematic cross-sectional view of a camera module according to another exemplary embodiment of the present disclosure.

[0044] Throughout the drawings and specific embodiments, identical reference numerals designate identical or similar elements. The drawings can not be drawn to scale and relative dimensions, proportions, and depiction of elements in the drawings can be exaggerated for clarity, illustration, and convenience. DETAILED DESCRIPTION

[0045] 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 the disclosure herein has been presented to enable any person skilled in the art to make or use the methods, apparatuses, and / or systems described herein, as well as alternatives and equivalents to those elements

[0046] 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, apparatuses, and / or systems described herein can be implemented. In particular, the examples described herein are provided entirely for the purpose of illustration only and are not intended to limit the disclosure in any way.

[0047] Throughout the specification, when an element such as a layer, region, or substrate is referred to as being "on", "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, it should be understood that there are no other elements interposed therebetween.

[0048] “directly coupled to” another element, then no other element is interposed between the element and the other element.

[0049] 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.

[0050] Although the terms “first,” “second,” and “third” can be used herein to describe various elements, components, regions, layers, or sections, these elements, components, regions, layers, 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.

[0051] Thus, terms such as “first” and “second” are used herein to distinguish different elements, components, regions, layers, or sections from each other, and are not used to designate a particular order or sequence.

[0052] Thus, terms such as “first” and “second” are used herein to distinguish different elements, components, regions, layers, or sections from each other, and are not used to designate a particular order or sequence.

[0053] Spatially relative terms, such as “on,” “upper,” “lower,” “below,” and “above,” can be used herein for ease of description to describe the

[0054] relationship of one element or component to another element or component as illustrated in the figures. Unless otherwise noted, the spatially relative terms are intended to encompass different orientations of the device in use or operation, for example, dependent on the particular orientation of the device on a surface, support, or bed of use or operation.

[0055] For example, if a device is turned over, a component described as on top of another component or relative to the other component as upper, can be

[0056] repositioned as on the bottom of the other component or relative to the other component as lower. Accordingly, the spatially relative terms can be interpreted differently depending on the particular orientation of the device in use or operation.

[0057] Thus, the spatially relative terms “on,” “under,” “below,” “above,” “upper,” and “lower” encompass different orientations of the device in use or operation, for example, dependent on the particular orientation of the device on a surface, support, or bed of use or operation.

[0058] The terms used herein are for describing various examples, not for limiting the disclosure.

[0059] The articles "a", "an", and "the" are intended to mean that there are one or more (for example, one) of the items. The terms "comprising", "including", and "having" are intended to be inclusive and mean that there can be additional items in addition to the listed items. The term "coupled" means to be directly or indirectly connected, and includes mechanical, electrical, and / or hydraulic connections.

[0060] Variations in the shapes shown in the drawings can occur due to manufacturing techniques and / or tolerances. Therefore,

[0061] Examples described herein are not limited to the specific shapes shown in the drawings, but include variations in shapes that occur during manufacturing.

[0062] Features of the examples described herein can be combined in various ways. In addition, although examples described herein have a variety of configurations, other configurations are possible in light of the disclosure of the present application.

[0063] The sensor shift actuator according to exemplary embodiments of the present disclosure can be a camera module component. In addition, the camera module can be mounted in a portable electronic device. The portable electronic device can be, for example, a mobile communication terminal, a smart phone, or a tablet PC.

[0064] Figure 1 is a schematic sectional view of a sensor shift actuator according to exemplary embodiments of the present disclosure. Figure 2 is a view showing Figure 1 is a view showing an example in which connection between an image sensor and a sensor substrate in

[0065] Referring to Figure 1 and Figure 2 The sensor shift actuator 100 can include a sensor substrate 140, a base 130, and a driver 120.

[0066] The image sensor 111 can be disposed on the sensor substrate 140, and a portion of the sensor substrate 140 can be configured to be relatively movable with respect to the base 130.

[0067] The portion of the sensor substrate 140 can be a component that moves together with the image sensor 111.

[0068] The image sensor 111 can be disposed on a surface of the sensor substrate 140. In an exemplary embodiment, contact points P1 and P2 of the image sensor 111 and the sensor substrate 140 can be electrically connected by wire bonding (see Figure 1). In another exemplary embodiment, the image sensor 111 and the sensor substrate 140 can be electrically connected to each other by solder balls at the respective contact points P1 and P2 (see Figure 2 )。

[0069] The base 130 can have a box shape with an open upper portion, and the sensor substrate 140 can be disposed in an inner space of the base 130.

[0070] The driver 120 can move a portion of the sensor substrate 140 and the image sensor 111.

[0071] The image sensor 111 can be moved in a direction orthogonal to a direction in which an imaging surface 111a of the image sensor 111 is directed, by the driver 120. In an exemplary embodiment, the driver 120 can correct for a shake that occurs during image capturing of a camera module on which the image sensor 111 is mounted.

[0072] The driver 120 can allow a portion of the sensor substrate 140 on which the image sensor 111 is mounted to move in a first direction (X direction) and a second direction (Y direction) orthogonal 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 a portion of the sensor substrate 140 to move in the first direction (X direction) and / or the second direction (Y direction) orthogonal to the optical axis (Z axis), and thus can correct for a shake.

[0073] In this specification, a direction in which the imaging surface 111a of the image sensor 111 is directed can be referred to as an optical axis (Z axis) direction. That is, the image sensor 111 can be moved in a direction orthogonal to the optical axis (Z axis) with respect to the base 130.

[0074] In the drawings of this specification, the image sensor 111 that is moved in a direction parallel to the imaging surface 111a can be understood as the image sensor 111 that is moved in a direction orthogonal to the optical axis (Z axis).

[0075] The image sensor 111 that is moved in the first direction (X direction) can be understood as the image sensor 111 that is moved in a direction orthogonal to the optical axis (Z axis). For another example, the movable yoke portion 121 and the coil portion 122 that are opposite each other in the first direction (X direction) can be understood as the movable yoke portion 121 and the coil portion 122 that are opposite each other in a direction orthogonal to the optical axis (Z axis).

[0076] Further, the first direction (X direction) and the second direction (Y direction) can be examples of two directions orthogonal to the optical axis (Z axis) and intersecting each other. In the present specification, the first direction (X direction) and the second direction (Y direction) can be understood as two directions orthogonal to the optical axis (Z axis) and intersecting each other.

[0077] Figure 3 is a plan view of a sensor substrate according to an exemplary embodiment.

[0078] Referring to Figure 3 , the sensor substrate 140 can support the image sensor 111 such that the image sensor 111 moves in a direction orthogonal to the optical axis (Z axis) with respect to the base 130.

[0079] A portion of the sensor substrate 140 can be deformed according to the movement of the image sensor 111 with respect to the base 130. That is, a portion of the sensor substrate 140 can be flexible. When the sensor substrate 140 is deformed, a restoring force can be generated in the sensor substrate 140. Such a restoring force can allow the image sensor 111 to return to its initial position. When a current is applied to the coil portion 122, a portion of the sensor substrate 140 in a state of equilibrium can move with respect to the base 130. When no current flows in the coil portion 122, the sensor substrate 140 can return to its initial position by the restoring force.

[0080] Referring to Figures 1-3 , the sensor substrate 140 can include a movable portion 141 on which the image sensor 111 is seated, and a fixed portion 142 fixed to the base 130.

[0081] The contact points P1 and P2 of the image sensor 111 and the movable portion 141 can be electrically connected to each other by wire bonding. Alternatively, the image sensor 111 and the movable portion 141 can be electrically connected to each other by solder balls at the respective contact points P1 and P2.

[0082] The image sensor 111 and the movable portion 141 can move with respect to the fixed portion 142. The sensor substrate 140 can include a support portion 143 connecting the movable portion 141 and the fixed portion 142 to each other. The support portion 143 can be at least partially deformed according to the relative movement between the movable portion 141 and the fixed portion 142. For example, the support portion 143 can be formed of a flexible substrate. The flexible substrate can be provided in the form of a conductive pattern (or an electrical trace 145) formed inside a film formed of a polyimide material.

[0083] In an exemplary embodiment, the movable portion 141 can have a height different from that of the fixed portion 142 and the support portion 143. The height can refer to a height in a direction in which the imaging surface 111a is directed.

[0084] Referring to Figure 1 and Figure 2 The surface of the movable portion 141 can be located at a position higher than the surface of the fixed portion 142 and the surface of the support portion 143. For example, the movable portion 141 can be provided as a multi-layer substrate. The bracket 110 on which the driver 120 is mounted can be attached to the movable portion 141, and thus the movable portion 141 can be positioned higher than the fixed portion 142 and the support portion 143, thereby preventing interference with the fixed portion 142 and the support portion 143 during movement of the movable portion 141 and the bracket 110.

[0085] In an exemplary embodiment, the sensor substrate 140 can include a plurality of bridge elements 144 connected between the movable portion 141 and the fixed portion 142. The plurality of bridge elements 144 can be included in at least a portion of the support portion 143.

[0086] The plurality of bridge elements 144 can be formed of a flexible material and can be deformed when the movable portion 141 moves with respect to the fixed portion 142. The bridge elements 144 can be deformed when the image sensor 111 and the movable portion 141 move with respect to the base 130. Restoring force generated when the bridge elements 144 are deformed can allow the image sensor 111 and the movable portion 141 to return to their initial positions.

[0087] The plurality of bridge elements 144 can respectively embed at least one electric trace 145. That is, the plurality of bridge elements 144 can electrically connect the movable portion 141 and the fixed portion 142 to each other while mechanically connecting the movable portion 141 and the fixed portion 142 to each other.

[0088] Accordingly, the bridge elements 144 can serve as a path that transmits a signal of the image sensor 111 while supporting the image sensor 111.

[0089] The plurality of bridge elements 144 can include a bridge portion 144a and a trace portion 145a. Referring to Figure 1 , the trace portion 145a can be disposed at one end of the bridge portion 144a. In another exemplary embodiment, the trace portion 145a can be respectively disposed at one end and the other end of the bridge portion 144a.

[0090] The bridge portion 144a can mechanically connect the movable portion 141 to the fixed portion 142, and the trace portion 145a can electrically connect the movable portion 141 to the fixed portion 142.

[0091] The plurality of bridge elements 144 can be formed through an etching process. Accordingly, side surfaces of the bridge portions 144a of the plurality of bridge elements 144 can include curved surfaces.

[0092] In an exemplary embodiment, the sensor substrate 140 can include a connection portion 146 disposed between the movable portion 141 and the fixed portion 142. For example, the connection portion 146 can be disposed in the form of a quadrangular frame surrounding the movable portion 141.

[0093] The connection portion 146 can be configured to surround the movable portion 141, and the fixed portion 142 can be configured to surround the connection portion 146.

[0094] A space can be formed between the movable portion 141 and the connection portion 146 to accommodate a range of movement of the movable portion 141 with respect to the connection portion 146. Also, a space can be formed between the connection portion 146 and the fixed portion 142 to accommodate a range of movement of the connection portion 146 with respect to the fixed portion 142.

[0095] The fixed portion 142, the connection portion 146, and the movable portion 141 can be connected by the bridge elements 144. For example, the sensor substrate 140 can include a first bridge portion 147 connecting the fixed portion 142 and the connection portion 146 to each other, and a second bridge portion 148 connecting the movable portion 141 and the connection portion 146 to each other.

[0096] The first bridge portion 147 and the second bridge portion 148 can extend in a direction orthogonal to the optical axis (Z-axis). The first bridge portion 147 and the second bridge portion 148 can extend in directions intersecting each other. For example, the first bridge portion 147 can extend in the Y direction, and the second bridge portion 148 can extend in the X direction.

[0097] The first bridge portion 147 and the second bridge portion 148 can each include one or more bridge elements 144. In Figure 3 In an exemplary embodiment, the first bridge portion 147 can include four bridge elements 144 extending in the Y direction, and the second bridge portion 148 can include four bridge elements 144 extending in the X direction. However, the present disclosure is not limited in the number of the respective bridge elements 144.

[0098] Referring again to Figure 3The sensor substrate 140 can include an electrical trace 145 that transmits a signal of the image sensor 111. The plurality of bridge elements 144 included in the support portion 143 can embed the electrical trace 145. The image sensor 111 can be electrically connected to the movable portion 141 of the sensor substrate 140. The electrical trace 145 can extend from each of the contact points P2 formed on the movable portion 141. The electrical trace 145 can extend to the fixed portion 142 through the bridge element 144. The electrical trace 145 extended to the fixed portion 142 can be electrically connected to another substrate or an electronic component.

[0099] Figure 3 The electrical trace 145 formed on the sensor substrate 140 is schematically illustrated, and only the electrical trace 145 extended from some of the contact points P2 is illustrated for convenience of description.

[0100] The bridge elements 144 can respectively have a width w and a height h. For example, the width can refer to a width in a direction orthogonal to a direction in which the bridge element 144 extends in the X-Y plane. For example, the width of each of the bridge elements 144 of the first bridge portion 147 can refer to a width in the X direction, and the width of each of the bridge elements 144 of the second bridge portion 148 can refer to a width in the Y direction.

[0101] Further, the height can refer to a height in the optical axis (Z-axis) direction.

[0102] The bridge elements 144 can respectively have a shape in which the width w is smaller than the height h. Through such a shape, a direction in which the bridge element 144 is bent can be limited. For example, the bridge elements 144 of the first bridge portion 147 can be bent in a first direction (X direction), and the bridge elements 144 of the second bridge portion 148 can be bent in a second direction (Y direction).

[0103] Figures 4A-4D A state in which the sensor substrate 140 is deformed according to movement of the image sensor is illustrated.

[0104] A portion of the image sensor 111 and the sensor substrate 140 can move together. Here, the portion of the sensor substrate 140 that moves together with the image sensor 111 can change according to a direction in which the image sensor 111 moves. For example, when the image sensor 111 moves in one direction (for example, the X direction), the movable portion 141 and the connection portion 146 of the sensor substrate 140 can move together with the image sensor 111. Further, when the image sensor 111 moves in another direction (for example, the Y direction), the movable portion 141 of the sensor substrate 140 can move together with the image sensor 111.

[0105] Referring to Figure 4AWhen the image sensor 111 moves in the -X direction, the movable portion 141 and the connection portion 146 of the sensor substrate 140 can also move in the -X direction, and thus the first bridge portion 147 connecting the connection portion 146 and the fixed portion 142 to each other can be deformed. The bridge element 144 included in the first bridge portion 147 can have elasticity, and thus the deformed first bridge portion 147 can provide a restoring force to return the movable portion 141 in a direction opposite to the moving direction, that is, the +X direction. Thus, when no current is applied to the driver 120, the movable portion 141 and the connection portion 146 can move in the +X direction.

[0106] Referring to Figure 4B When the image sensor 111 moves in the +X direction, the movable portion 141 and the connection portion 146 of the sensor substrate 140 can also move in the +X direction, and thus the first bridge portion 147 connecting the connection portion 146 and the fixed portion 142 to each other can be deformed. The bridge element 144 included in the first bridge portion 147 can have elasticity, and thus the deformed first bridge portion 147 can provide a restoring force to return the movable portion 141 in a direction opposite to the moving direction, that is, the -X direction. Thus, when no current is applied to the driver 120, the movable portion 141 and the connection portion 146 can move in the -X direction.

[0107] Referring to Figure 4C When the image sensor 111 moves in the +Y direction, the movable portion 141 of the sensor substrate 140 can also move in the +Y direction, and thus the second bridge portion 148 connecting the movable portion 141 and the connection portion 146 to each other can be deformed. The bridge element 144 included in the second bridge portion 148 can have elasticity, and thus the deformed second bridge portion 148 can provide a restoring force to return the movable portion 141 in a direction opposite to the moving direction, that is, the -Y direction. Thus, when no current is applied to the driver 120, the movable portion 141 can move in the -Y direction.

[0108] Referring to Figure 4D When the image sensor 111 moves in the -Y direction, the movable portion 141 of the sensor substrate 140 can also move in the -Y direction, and thus the second bridge portion 148 connecting the movable portion 141 and the connection portion 146 to each other can be deformed. The bridge element 144 included in the second bridge portion 148 can have elasticity, and thus the deformed second bridge portion 148 can provide a restoring force to return the movable portion 141 in a direction opposite to the moving direction, that is, the +Y direction. Thus, when no current is applied to the driver 120, the movable portion 141 can move in the +Y direction.

[0109] Referring again to Figure 1 and Figure 2 In an exemplary embodiment, the driver 120 can include the coil portion 122 and the movable yoke portion 121 disposed opposite each other.

[0110] One of the coil portion 122 and the movable yoke portion 121 can be coupled to the base 130, and the other can be coupled to the bracket 110. The bracket 110 can be coupled to the movable portion 141 of the sensor substrate 140 to move together with the movable portion 141.

[0111] In an exemplary embodiment, the bracket 110 can be omitted. That is, one of the coil portion 122 and the movable yoke portion 121 can be coupled to the base 130, and the other can be coupled to the movable portion 141 of the sensor substrate 140.

[0112] The movable yoke portion 121 and the coil portion 122 can be opposite each other in a direction orthogonal to the optical axis (Z-axis). Electromagnetic interaction between the movable yoke portion 121 and the coil portion 122 can allow the image sensor 111 to move with respect to the base 130 in a direction orthogonal to the optical axis (Z-axis).

[0113] In an exemplary embodiment, the driver 120 can further include a back yoke portion 123 disposed on one side of the coil portion 122. The back yoke portion 123 can allow a magnetic field generated by the coil portion 122 to be concentrated only in a direction toward the movable yoke portion 121. The back yoke portion 123 disposed on one side of the coil portion 122 can prevent or minimize the magnetic field generated by the coil portion 122 from affecting other electronic components. The back yoke portion 123 can be disposed between the base 130 and the coil portion 122.

[0114] In this specification, for ease of description, it is described that the coil portion 122 can be coupled to the base 130, and the movable yoke portion 121 can be coupled to the bracket 110. In another exemplary embodiment, the coil portion 122 can be coupled to the bracket 110, and the movable yoke portion 121 can be coupled to the base 130.

[0115] An air gap can be formed between the coil portion 122 and the movable yoke portion 121 opposite each other. For example, a space can be formed between the coil portion 122 and the movable yoke portion 121 opposite each other. That is, there can be no other member (e.g., a magnet) between the coil portion 122 and the movable yoke portion 121 opposite each other. The coil portion 122 and the movable yoke portion 121 can directly oppose each other with the air gap formed therebetween.

[0116] In an exemplary embodiment, the driver 120 can not include a permanent magnet. In an exemplary embodiment, when no current flows in the coil portion 122, a magnetic field induced by the movable yoke portion 121 can be 0 (zero) or can be at a significantly low level, thereby preventing or minimizing the magnetic field induced by the driver 120 itself from affecting other electronic components (for example, other electronic components in a camera module).

[0117] In an exemplary embodiment, the movable yoke portion 121 can be formed of a soft magnetic material. The soft magnetic material can have a small coercivity and can be magnetized when exposed to a magnetic field, and can lose magnetism or can have a relatively low level of magnetism when the magnetic field disappears.

[0118] When a current is applied to the coil portion 122, the movable yoke portion 121 can be magnetized, thereby generating a magnetic drag force between the coil portion 122 and the movable yoke portion 121. An attractive force can be generated in a direction in which the movable yoke portion 121 and the coil portion 122 are opposite to each other. The attractive force can allow the image sensor 111 to move in a corresponding direction with respect to the base 130.

[0119] Figure 5 is a schematic plan view of a sensor shift actuator according to an exemplary embodiment of the disclosure.

[0120] Referring to Figure 5 , the coil portion 122 can include a first coil 122a, a second coil 122b, a third coil 122c, and a fourth coil 122d, and the movable yoke portion 121 can include a first movable yoke 121a, a second movable yoke 121b, a third movable yoke 121c, and a fourth movable yoke 121d. In addition, the back yoke portion 123 can include a first back yoke 123a, a second back yoke 123b, a third back yoke 123c, and a fourth back yoke 123d.

[0121] The first coil 122a to the fourth coil 122d can be disposed on an inner surface of the base 130, respectively. The first coil 122a and the second coil 122b can be spaced apart from each other in a first direction (X direction), and the third coil 122c and the fourth coil 122d can be spaced apart from each other in a second direction (Y direction). Accordingly, a direction in which the first coil 122a and the second coil 122b are spaced apart from each other can be orthogonal to a direction in which the third coil 122c and the fourth coil 122d are spaced apart from each other.

[0122] The first movable yoke 121a to the fourth movable yoke 121d can be disposed on an outer surface of the bracket 110 to be opposite to the first coil 122a to the fourth coil 122d, respectively.

[0123] When a current is applied to the first coil 122a, an attractive force can be generated between the first coil 122a and the first movable magnetic yoke 121a. The attractive force can move the image sensor 111 in the -X direction. In contrast, when a current is applied to the second coil 122b, an attractive force can be generated between the second coil 122b and the second movable magnetic yoke 121b. The attractive force can move the image sensor 111 in the +X direction.

[0124] In addition, when a current is applied to the third coil 122c, an attractive force can be generated between the third coil 122c and the third movable magnetic yoke 121c. The attractive force can move the image sensor 111 in the +Y direction. In contrast, when a current is applied to the fourth coil 122d, an attractive force can be generated between the fourth coil 122d and the fourth movable magnetic yoke 121d. The attractive force can move the image sensor 111 in the -Y direction.

[0125] The driver 120 can include a plurality of unit drivers 120a, 120b, 120c, and 120d. The plurality of unit drivers 120a, 120b, 120c, and 120d can respectively include movable magnetic yokes and coils that face each other.

[0126] Only an attractive force can be generated between the coils and the movable magnetic yokes that face each other, and thus at least two unit drivers can be required to reciprocate the image sensor 111 in one direction.

[0127] Referring to Figure 5 , the driver 120 can include a first unit driver 120a disposed in the -X direction of the image sensor 111 and a second unit driver 120b disposed in the +X direction of the image sensor 111 so as to correct the shake in the X direction.

[0128] The first unit driver 120a can include a first movable magnetic yoke 121a coupled to the bracket 110 and a first coil 122a coupled to the base 130. The second unit driver 120b can include a second movable magnetic yoke 121b coupled to the bracket 110 and a second coil 122b coupled to the base 130.

[0129] The driver 120 can include a third unit driver 120c disposed in the +Y direction of the image sensor 111 and a fourth unit driver 120d disposed in the -Y direction of the image sensor 111 so as to correct the shake in the Y direction.

[0130] The third unit driver 120c can include a third movable magnetic yoke 121c coupled to the bracket 110 and a third coil 122c coupled to the base 130. The fourth unit driver 120d can include a fourth movable magnetic yoke 121d coupled to the bracket 110 and a fourth coil 122d coupled to the base 130.

[0131] Figures 6A-6D A state in which the image sensor moves is schematically shown.

[0132] Referring to Figure 6A , a current can be applied to the first coil 122a so that the first coil 122a can pull the first movable magnetic yoke 121a in the arrow direction, which can move the image sensor 111 in the -X direction.

[0133] Referring to Figure 6B , a current can be applied to the second coil 122b so that the second coil 122b can pull the second movable magnetic yoke 121b in the arrow direction, which can move the image sensor 111 in the +X direction.

[0134] Referring to Figure 6C , a current can be applied to the third coil 122c so that the third coil 122c can pull the third movable magnetic yoke 121c in the arrow direction, which can move the image sensor 111 in the +Y direction.

[0135] Referring to Figure 6D , a current can be applied to the fourth coil 122d so that the fourth coil 122d can pull the fourth movable magnetic yoke 121d in the arrow direction, which can move the image sensor 111 in the -Y direction.

[0136] Figure 7A An example in which the position sensor part further includes in the sensor shift actuator is shown. Figure 7B is a diagram showing a schematic configuration of the position sensor part. Figure 8 is a diagram showing a sensing yoke part and a sensing coil of the position sensor part according to an exemplary embodiment.

[0137] Referring to Figure 7A , Figure 7B and Figure 8 , the sensor shift actuator 100 according to an exemplary embodiment of the disclosure can further include a position sensor part 160.

[0138] For example, when the image sensor 111 moves in a first direction (X direction), the position of the image sensor 111 can be sensed by the position sensor part 160. When the image sensor 111 moves in a second direction (Y direction), the position of the image sensor 111 can be sensed by the position sensor part 160.

[0139] The position sensor portion 160 can include a first position sensor 170 and a second position sensor 180. The first position sensor 170 can be used to detect a position of the image sensor 111 in a first direction (X direction), and the second position sensor 180 can be used to detect a position of the image sensor 111 in a second direction (Y direction).

[0140] The first position sensor 170 can 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 can be disposed on the movable portion 141 of the sensor substrate 140, and the other can be disposed on the base 130. In an exemplary embodiment, the first sensing yoke portion 171 can be disposed on the base 130, and the first sensing coil 172 can be disposed on the movable portion 141 of the sensor substrate 140. Accordingly, the first sensing coil 172 can be a movable member that moves together with the movable portion 141.

[0141] The first sensing coil 172 and the first sensing yoke portion 171 can be disposed to face each other in the direction of the optical axis (Z axis).

[0142] The first sensing yoke portion 171 can include a first sensing yoke 171a and a second sensing yoke 171b that are spaced apart from each other.

[0143] The second position sensor 180 can 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 can be disposed on the movable portion 141 of the sensor substrate 140, and the other can be disposed on the base 130. In an exemplary embodiment, the second sensing yoke portion 181 can be disposed on the base 130, and the second sensing coil 182 can be disposed on the movable portion 141 of the sensor substrate 140. Accordingly, the second sensing yoke portion 181 can be a movable member that moves together with the movable portion 141.

[0144] The second sensing coil 182 and the second sensing yoke portion 181 can be disposed to face each other in the direction of the optical axis (Z axis).

[0145] The second sensing yoke portion 181 can include a third sensing yoke 181a and a fourth sensing yoke 181b that are spaced apart from each other.

[0146] The configurations and sensing methods of the first position sensor 170 and the second position sensor 180 can be the same. Accordingly, for convenience of description, only the first position sensor 170 will be described below.

[0147] The inductance of the first sensing coil 172 can vary according to a change in the position of the opposing first sensing yoke portion 171.

[0148] Specifically, when the relative positions of the first sensing coil 172 and the first sensing yoke portion 171 change, the size of the eddy current of the first sensing yoke portion 171 affecting the inductance of the first sensing coil 172 can change, and the strength of the magnetic field according to the eddy current can change, and thus the inductance of the first sensing coil 172 can change.

[0149] The first sensing yoke portion 171 can be a conductor or a magnetic material.

[0150] The sensor shift actuator 100 can determine the displacement of the image sensor 111 according to a change in the inductance of the first sensing coil 172. As an example, the sensor shift actuator 100 can additionally include at least one capacitor, and the at least one capacitor and the first sensing coil 172 can form a predetermined oscillation circuit.

[0151] As an example, at least one capacitor can be provided to correspond to the number of first sensing coils 172, and one capacitor and one first sensing coil 172 can be configured in the form of a predetermined LC oscillator. Further, the at least one capacitor and the first sensing coil 172 can be configured in the form of a well-known Colpitts oscillator.

[0152] The sensor shift actuator 100 can determine the displacement of the image sensor 111 according to a change in the frequency of an 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 the frequency.

[0153] Referring to Figure 8 , the first sensing yoke portion 171 can include a first sensing yoke 171a and a second sensing yoke 171b.

[0154] In an exemplary embodiment, the first sensing yoke portion 171 can further include a support member 171c on which the first sensing yoke 171a and the second sensing yoke 171b are disposed. The support member 171c can be attached to the base 130.

[0155] The first sensing yoke 171a and the second sensing yoke 171b can be manufactured to be attached to the support member 171c, or integrated with the support member 171c by a insert injection process.

[0156] However, the disclosure is not limited thereto, and the first sensing magnetic yoke portion 171 can not include the support member 171c. In this case, the first sensing magnetic yoke 171a and the second sensing magnetic yoke 171b can be manufactured to be directly attached to the base 130, or integrated with the base 130 through an insert injection process.

[0157] The first sensing magnetic yoke 171a and the second sensing magnetic yoke 171b can be spaced apart from each other in the second direction (Y direction). Also, each sensing magnetic yoke can be disposed to be opposite to a portion of the first sensing coil 172. For example, the first sensing magnetic yoke 171a and the second sensing magnetic yoke 171b can be disposed to be opposite to the first sensing coil 172 in the optical axis (Z axis) direction, respectively.

[0158] A direction of a current flowing in a portion of the first sensing coil 172 opposite to the first sensing magnetic yoke 171a can be different from a direction of a current flowing in a portion of the first sensing coil 172 opposite to the second sensing magnetic 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 magnetic yoke 171a can be opposite to the direction of the current flowing in the portion of the first sensing coil 172 opposite to the second sensing magnetic yoke 171b.

[0159] A distance between the first sensing magnetic yoke 171a and the second sensing magnetic yoke 171b in the second direction (Y direction) can be shorter than a distance between opposite ends of the first sensing coil 172 in the second direction (Y direction).

[0160] The first sensing magnetic yoke 171a and the second sensing magnetic yoke 171b can each have a width that varies according to a coordinate of a direction (e.g., the X direction) in which the image sensor 111 moves.

[0161] The first sensing magnetic yoke 171a and the second sensing magnetic yoke 171b can each output a magnetic flux caused by eddy current. A magnitude of the eddy current and a magnitude of the magnetic flux can be related to each other.

[0162] A magnitude of the eddy current that can be formed in each of the first sensing magnetic yoke 171a and the second sensing magnetic yoke 171b can depend on a width of a portion of the first sensing magnetic yoke 171a and the second sensing magnetic yoke 171b opposite to the first sensing coil 172.

[0163] For example, the first sensing coil 172 can move in the first direction (X direction) from a viewpoint of the first sensing magnetic yoke 171a and the second sensing magnetic yoke 171b, and thus a magnitude of the eddy current that can be formed in each of the first sensing magnetic yoke 171a and the second sensing magnetic yoke 171b can depend on a relative movement of the first sensing coil 172 in the first direction (X direction).

[0164] The inductance of the first sensing coil 172 can be sum or difference of mutual inductance caused by the magnetic flux and the self-inductance of the first sensing coil 172, and thus the inductance can vary according to the magnitude of the magnetic flux caused by the eddy current. The position of the image sensor 111 can be sensed based on the inductance of the first sensing coil 172.

[0165] Since the magnitude of the eddy current of each of the first and second sensing magnetic yokes 171a and 171b is linear according to the change in the moving displacement of the image sensor 111, the position of the image sensor 111 can be more accurately sensed.

[0166] The first and second sensing magnetic yokes 171a and 171b can respectively have shapes having repeatedly increasing or decreasing widths in a direction in which the image sensor 111 moves (e.g., the X direction). The width can refer to a width in the second direction (the Y direction).

[0167] For example, the first sensing magnetic yoke 171a can have a shape in which the width repeatedly decreases-increases-decreases-increases in the first direction (the X direction). The second sensing magnetic yoke 171b can have a shape in which the width repeatedly decreases-increases-decreases-increases in the first direction (the X direction).

[0168] In an example, each of the first and second sensing magnetic yokes 171a and 171b can be hourglass-shaped.

[0169] The first and second sensing magnetic yokes 171a and 171b can respectively have shapes having increasing or decreasing widths in one direction, and the first and second sensing magnetic yokes 171a and 171b can have shapes different from each other in terms of positions of the increasing or decreasing widths.

[0170] The first and second sensing magnetic yokes 171a and 171b can respectively have a plurality of minimum widths and a plurality of maximum widths.

[0171] A boundary line defining the width of each sensing magnetic yoke can have a sinusoidal wave form.

[0172] The winding thickness of the first sensing coil 172 can be greater than the minimum width of each sensing magnetic yoke, and can be less than the maximum width of each sensing magnetic yoke.

[0173] The position at which the first sensing magnetic yoke 171a has the minimum width can be different from the position at which the second sensing magnetic yoke 171b has the minimum width. Also, the position at which the first sensing magnetic yoke 171a has the maximum width can be different from the position at which the second sensing magnetic yoke 171b has the maximum width.

[0174] Accordingly, a coordinate of the image sensor 111 in a direction (e.g., the X direction) corresponding to the maximum width (the maximum width in the second direction (Y direction)) of the first sense magnetic yoke 171a can be different from a coordinate of the image sensor 111 in a direction (e.g., the X direction) corresponding to the maximum width (the maximum width in the second direction (Y direction)) of the second sense magnetic yoke 171b.

[0175] For example, an X direction coordinate of the image sensor 111 corresponding to the minimum width W1 of the first sense magnetic yoke 171a can be different from an X direction coordinate of the image sensor 111 corresponding to the minimum width of the second sense magnetic yoke 171b. An X direction coordinate of the image sensor 111 corresponding to the maximum width W2 of the first sense magnetic yoke 171a can be different from an X direction coordinate of the image sensor 111 corresponding to the maximum width of the second sense magnetic yoke 171b.

[0176] Accordingly, an effect of displacement in a direction of the first sense magnetic yoke 171a in a size pattern change of eddy currents of the first sense magnetic yoke 171a according to relative movement of the first sense coil 172 can be complementary to an effect of displacement in a direction of the second sense magnetic yoke 171b in a size pattern change of eddy currents of the second sense magnetic yoke 171b according to relative movement of the first sense coil 172.

[0177] Accordingly, the inductance of the first sense coil 172 can change more stably based on an integral of an inductance change factor according to a change in size of eddy currents of the first sense magnetic yoke 171a and an inductance change factor according to a change in size of eddy currents of the second sense magnetic yoke 171b. The sensor shift actuator 100 according to an exemplary embodiment of the disclosure can more stably and / or accurately detect movement of the image sensor 111, and can linearly and / or efficiently detect movement of the image sensor 111.

[0178] A length of the first sense magnetic yoke 171a in the first direction (X direction) can be one or more periods of a width period of the first sense magnetic yoke 171a, and a length of the second sense magnetic yoke 171b in the first direction (X direction) can be one or more periods of a width period of the second sense magnetic yoke 171b.

[0179] The width of each of the first sense magnetic yoke 171a and the second sense magnetic yoke 171b can repeat every period. A first direction (X direction) length of the width period of each of the first sense magnetic yoke 171a and the second sense magnetic yoke 171b can vary according to a movement detection range of the image sensor 111.

[0180] Due to a difference between a coordinate of the image sensor 111 in a direction (for example, an X direction) corresponding to a maximum width of the first sense magnetic yoke 171a and a coordinate of the image sensor 111 in a direction (for example, an X direction) corresponding to a maximum width of the second sense magnetic yoke 171b, the output value of the first sense coil 172 according to movement of each sense magnetic yoke can be a sine wave having a 90-degree phase difference.

[0181] Accordingly, an output value obtained by performing an inverse tangent process on the output of the sine wave having a 90-degree phase difference can be linear with respect to movement of the image sensor 111.

[0182] The first sense magnetic yoke 171a and the second sense magnetic yoke 171b can each include at least one of copper, silver, gold, and aluminum. Copper, silver, gold, and aluminum can have a relatively high electrical conductivity, and thus a total size of eddy currents formed in each of the first sense magnetic yoke 171a and the second sense magnetic yoke 171b according to magnetic flux of the first sense coil 172 can increase, and movement detection sensitivity of the image sensor 111 can be further improved.

[0183] According to design, the first sense coil 172 can include a plurality of sense coils, and an inductance variation factor according to a variation in the size of the eddy current of the first sense magnetic yoke 171a and an inductance variation factor according to a variation in the size of the eddy current of the second sense magnetic yoke 171b are respectively applied to the plurality of sense coils. In this case, the first sense magnetic yoke 171a and the second sense magnetic yoke 171b can be disposed to face different sense coils.

[0184] The respective inductances of the plurality of sense coils can be used together to generate information about movement of the image sensor 111, so that the inductance variation factor according to the variation in the size of the eddy current of the first sense magnetic yoke 171a and the inductance variation factor according to the variation in the size of the eddy current of the second sense magnetic yoke 171b can be used in total, and the sensor shift actuator 100 according to the exemplary embodiment of the disclosure can more linearly sense movement of the image sensor 111.

[0185] Figure 9A and Figure 9B are graphs showing a change in a positional relationship between the first sense magnetic yoke portion and the first sense coil in the position sensor portion according to movement of the image sensor according to an exemplary embodiment.

[0186] Referring to Figure 9A and Figure 9B , the width of the first sense magnetic yoke portion 171 can vary in the movement direction of the image sensor 111. Accordingly, the area in which the first sense magnetic yoke portion 171 and the first sense coil 172 overlap in the optical axis (Z-axis) direction can vary according to movement of the image sensor 111.

[0187] The width of the portion of the first sensing coil 172 overlapping the first sensing magnetic yoke 171a and the second sensing magnetic yoke 171b in the optical axis (Z-axis) direction can vary according to the movement of the first sensing magnetic yoke 171a and the second sensing magnetic yoke 171b in the first direction (X direction). Accordingly, the inductance of the first sensing coil 172 can vary according to 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.

[0188] Figure 10 is a graph showing the inductance of the first sensing coil according to the movement of the image sensor in one direction.

[0189] Referring to Figure 10 , the period of the width of the first sensing magnetic yoke 171a can correspond to 360 degrees of phase.

[0190] When a specific region of the first sensing coil 172 (for example, a central portion of the first sensing coil 172) overlaps the minimum width of the first sensing magnetic yoke 171a, the normalized inductance of the first sensing coil 172 can have a maximum value.

[0191] When a specific region of the first sensing coil 172 (for example, a central portion of the first sensing coil 172) overlaps the maximum width of the first sensing magnetic yoke 171a, the normalized inductance of the first sensing coil 172 can have a minimum value.

[0192] Here, the normalization can be a value obtained by applying a certain weight to the inductance.

[0193] Figure 11A is a graph showing a plurality of inductances of the first sensing coil according to an exemplary embodiment of the disclosure, respectively corresponding to the first sensing magnetic yoke and the second sensing magnetic yoke of the sensor displacement actuator.

[0194] Referring to Figure 11A , the phase difference between the first inductance L1 of the first sensing coil 172 corresponding to the first sensing magnetic yoke 171a and the second inductance L2 of the first sensing coil 172 corresponding to the second sensing magnetic yoke 171b can be 90 degrees. Here, the inductance can be a value obtained by subtracting a certain value so that the average value of the normalized inductance becomes 0.

[0195] Figure 11B is a graph showing Figure 11A the arctangent processed values of the plurality of inductances shown in FIG. 11.

[0196] Referring to Figure 11B , the arctangent processed values can vary linearly with respect to the phase.

[0197] When there is a 90-degree phase difference between the first inductor L1 and the second inductor L2, one of the first inductor L1 and the second inductor L2 can correspond to {sin(phase)} and the other can correspond to {cos(phase)}.

[0198] In the trigonometric function model, the angle from the origin to a point of a circle can correspond to the phase of one period of the sense magnet yoke, the distance from the origin to the point of the circle can be r, and the X-direction vector value and the Y-direction vector value from the origin to the point of the circle can be X and Y, respectively.

[0199] {sin(phase)} can be y / r, {cos(phase)} can be x / r. {tan(phase)} can be y / x, {sin(phase)} / {cos(phase)}, and the second inductor / first inductor.

[0200] Accordingly, arctan(second inductor / first inductor) can correspond to the phase of one period of the displacement recognition layer, and can be an arctangent processed value.

[0201] Figure 12 is a schematic sectional view of a sensor displacement actuator 101 according to another exemplary embodiment of the disclosure.

[0202] Referring to Figure 12 Compared to the above-described sensor displacement actuator 100, the sensor displacement actuator 101 according to the present embodiment differs in the configuration of the driver and the configuration of the position sensor part, and a description will be omitted except for the description of the driver and the position sensor part.

[0203] The driver 120 can include a coil part 122' coupled to one of the bracket 110 and the base 130, and a magnet part 121' coupled to the other of the bracket 110 and the base 130.

[0204] Referring to Figure 12 , the coil part 122' can be coupled to the base 130, and the magnet part 121' can be coupled to the bracket 110. In this case, the substrate 124 can be disposed between the base 130 and the coil part 122'.

[0205] However, the disclosure is not limited thereto, and the coil part 122' can be coupled to the bracket 110, and the magnet part 121' can be coupled to the base 130.

[0206] The coil part 122' and the magnet part 121' can be disposed to face each other in the optical axis (Z-axis) direction. For example, in Figure 12In the illustrated embodiment, the magnet portion 121' is a moving member that moves together with the bracket 110, and the coil portion 122' is a fixed member that is fixed to the base 130.

[0207] In the exemplary embodiment, the coil portion 122' can include four coils disposed in a corner region of the sensor substrate 140, and the magnet portion 121' can include four magnets. Each coil and each magnet can be disposed to be located in a space between the connection portion 146 and the fixed portion 142 of the sensor substrate 140 when viewed from the optical axis (Z-axis) direction.

[0208] The image sensor 111 can move relative to the base 130 in a direction orthogonal to the optical axis (Z-axis) by electromagnetic force between the coil portion 122' and the magnet portion 121'.

[0209] Referring to Figure 12 , the position sensor portion 125 can be a Hall sensor, and can be disposed on the base 130 to face the magnet portion 121'.

[0210] Figure 13 is a schematic sectional view of a sensor shift actuator 102 according to another exemplary embodiment of the present disclosure.

[0211] Referring to Figure 13 , the magnet portion 121' can be coupled to the movable portion 141 of the sensor substrate 140, and the coil portion 122' can be coupled to the base 130. In this case, the substrate 124 can be disposed between the base 130 and the coil portion 122'.

[0212] However, the present disclosure is not limited thereto, and the coil portion 122' can be coupled to the movable portion 141 of the sensor substrate 140, and the magnet portion 121' can be coupled to the base 130.

[0213] The configuration of the position sensor portion 125 can be the same as in Figure 12 .

[0214] For reference, the configuration of the position sensor portion 160 described with reference to Figures 7A-11B may also be applied to the exemplary embodiments of Figure 12 and 13 without using a Hall sensor as the position sensor portion 125.

[0215] Figure 14 is a schematic sectional view of a camera module according to an exemplary embodiment of the present disclosure.

[0216] Referring to Figure 14A camera module according to an exemplary embodiment of the present disclosure can include a lens module 200, a housing 300, and a sensor shift actuator 100.

[0217] At least one lens for imaging an object can be accommodated in the lens module 200. When a plurality of lenses are provided, the plurality of lenses can be mounted inside the lens module 200 along an optical axis (Z-axis).

[0218] The lens module 200 can have a hollow cylindrical shape.

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

[0220] The lens module 200 can be accommodated in the housing 300. Also, the housing 300 can be coupled to the base 130 of the sensor shift actuator 100.

[0221] The sensor shift actuator 100 can be the sensor shift actuator 100 according to the above-described exemplary embodiment of the present disclosure.

[0222] The image sensor 111 can be disposed in the sensor shift actuator 100, and the image sensor 111 can be moved in a first direction (X direction) and a second direction (Y direction) by the driver 120.

[0223] Accordingly, a shake correction function can be performed by moving the image sensor 111.

[0224] According to an exemplary embodiment of the present disclosure, a camera module can perform shake correction by moving the image sensor 111 rather than the lens module 200. The image sensor 111 can be relatively light, and thus the camera module can move the image sensor 111 with a small driving force. Accordingly, the camera module can be miniaturized.

[0225] Also, the lens module 200 can be moved in an optical axis (Z-axis) direction with respect to the housing 300. Accordingly, a focus can be adjusted by moving the lens module 200 in the optical axis (Z-axis) direction.

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

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

[0228] When the lens module 200 moves, a ball member 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 member B can include a plurality of balls.

[0229] A guide groove portion for accommodating the ball member B can be formed on at least one surface of the lens module 200 and the housing 300 that faces each other in a direction orthogonal to the optical axis (Z-axis).

[0230] The ball member B can be accommodated in the guide groove portion to fit between the lens module 200 and the housing 300.

[0231] A magnetic yoke can be disposed to face the magnet 210 in a direction orthogonal to the optical axis (Z-axis). As an example, the magnetic yoke can be disposed on the other surface of the substrate. Accordingly, the magnetic yoke can be disposed to face the magnet 210, and the coil 230 is interposed between the magnetic yoke and the magnet 210.

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

[0233] Accordingly, the ball member B can maintain a contact state with the lens module 200 and the housing 300 by the attractive force between the magnetic yoke and the magnet 210.

[0234] In addition, a position sensor facing the magnet 210 can be disposed on the substrate.

[0235] In Figure 14 , the ball member B can be disposed on the opposite side of the magnet 210. However, this configuration is used to illustrate the ball member B, and the ball member B can be disposed at a position capable of maintaining a contact state with the lens module 200 and the housing 300 by the attractive force between the magnet 210 and the magnetic yoke.

[0236] Figure 15 is a schematic cross-sectional view of a camera module according to another exemplary embodiment of the present disclosure.

[0237] Referring to Figure 15 , a camera module 20 according to another exemplary embodiment of the present disclosure can include a housing 300, a reflection member R, a lens module 200, and a sensor shift actuator 100.

[0238] In the present exemplary embodiment, the optical axis (Z-axis) of the lens module 200 can be disposed in a direction orthogonal 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] For 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] When the components included in the camera module are stacked in the thickness direction of the portable electronic device, the thickness of the portable electronic device can increase.

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

[0242] The reflection member R and the lens module 200 can be disposed in the housing 300. However, the reflection member R and the lens module 200 can also be disposed in separate housings, and the respective housings can be coupled to each other.

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

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

[0245] The sensor shift actuator can be the sensor shift actuator 100 according to the above-described exemplary embodiments of the present disclosure.

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

[0247] Accordingly, a shake correction function can be performed by moving the image sensor 111.

[0248] In addition, the lens module 200 can move in the optical axis (Z-axis) direction with respect to the housing 300. Accordingly, a focus can be adjusted by moving the lens module 200 in the optical axis (Z-axis) direction.

[0249] The configuration of the focus adjustment driver can be the same as that of the focus adjustment driver described with reference to Figure 14 and thus a detailed description thereof will be omitted.

[0250] According to an exemplary embodiment of the present disclosure, a sensor shift actuator and a camera module including the same can improve the shake correction performance.

[0251] While the disclosure includes specific examples, it will be apparent to those skilled in the art after understanding the disclosure provided herein that various changes in form and details can 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 as being descriptive in nature rather than limiting in purpose. Descriptions of features or aspects in each example are to be considered as applicable to similar features or aspects in other examples. Proper results can still be achieved if the described techniques are performed in a different order, and / or if components in the described systems, architectures, devices, or circuits are combined or substituted for one another or are supplemented, regardless of whether the substitution, combination, or supplementation is described herein. Accordingly, the scope of the disclosure is not limited by the specific embodiments described herein, but only by the claims and their equivalents, and all variations within the scope of the claims and their equivalents are to be construed as being included in the disclosure.

Claims

1. A sensor displacement actuator, comprising: A sensor substrate on which an image sensor with an imaging surface is disposed; A base configured to accommodate the sensor substrate; as well as A driver configured to drive the image sensor in a first direction and a second direction parallel to the imaging plane. The sensor substrate includes a movable portion on which the image sensor is disposed, a fixed portion connected to the base, and a connecting portion disposed between the movable portion and the fixed portion. The connecting portion is configured to surround the movable portion, and the fixed portion is configured to surround the connecting portion. Depending on the direction of movement of the image sensor, the movable part and the connecting part move relative to the fixed part, or the movable part moves relative to the connecting part. A portion of the sensor substrate deforms according to the movement of the image sensor relative to the base.

2. The sensor shifting actuator according to claim 1, wherein, The sensor substrate further includes a first bridging portion configured to connect the fixed portion and the connecting portion to each other in the first direction, and a second bridging portion configured to connect the movable portion and the connecting portion to each other in the second direction. Each of the first bridging portion and the second bridging portion includes a plurality of bridging elements. The first direction and the second direction are orthogonal to each other, and Each of the bridging elements extends in the connection direction.

3. The sensor shifting actuator according to claim 2, wherein, When the image sensor moves in the first direction, the first bridging portion elastically deforms, and When the image sensor moves in the second direction, the second bridging portion elastically deforms.

4. The sensor shifting actuator according to claim 2, wherein, Each of the bridging elements has a width and a height, and the width is less than the height. The width extends in a plane parallel to the imaging surface in a direction orthogonal to the length direction of each of the bridging elements, and the height extends in a direction orthogonal to the imaging surface.

5. The sensor shifting actuator according to claim 2, wherein, Each of the bridging elements includes a bridging portion and a trace portion disposed at one end of the bridging portion, and The signal from the image sensor is transmitted to the outside of the image sensor through the trace portion.

6. The sensor shifting actuator according to claim 1, further comprising: The bracket is connected to the movable part. The driver includes a coil portion disposed on one of the bracket and the base, and a movable magnetic yoke portion disposed on the other of the bracket and the base. The movable yoke portion is formed of a soft magnetic material magnetized by the magnetic field passing through the coil portion.

7. The sensor shifting actuator according to claim 6, wherein, The coil portion and the movable yoke portion are arranged opposite each other in a direction parallel to the imaging plane.

8. The sensor shifting actuator according to claim 6, wherein, The upper surface of the movable part is higher than the upper surface of the fixed part and the upper surface of the connecting part in a direction orthogonal to the imaging plane.

9. The sensor shifting actuator according to claim 1, wherein, The driver includes a coil portion disposed on one of the movable part and the base, and a magnet portion disposed on the other of the movable part and the base. The coil portion and the magnet portion are arranged to face each other in a direction orthogonal to the imaging plane.

10. The sensor shifting actuator according to claim 9, wherein, When viewed from a direction orthogonal to the imaging plane, the coil portion and the magnet portion are located in the space between the fixed portion and the connecting portion.

11. The sensor shifting actuator according to claim 1, further comprising: The position sensor portion is configured to sense the position of the image sensor. The position sensor portion includes a sensing coil disposed on one of the movable portion and the base, and a sensing magnetic yoke disposed on the other of the movable portion and the base. The sensing yoke portion includes a plurality of sensing yokes spaced apart from each other in a direction parallel to the imaging plane, and The width of each of the sensing yokes is configured to vary in the direction of movement of the image sensor.

12. The sensor shifting actuator according to claim 11, wherein, The plurality of sensing yokes includes a first sensing yoke and a second sensing yoke, and Each of the first sensing yoke and the second sensing yoke is opposite to the sensing coil in a direction orthogonal to the imaging plane.

13. The sensor shifting actuator according to claim 12, wherein, Each of the first and second sensing yokes has a width that increases or decreases in the direction of movement of the image sensor, and The first sensing yoke and the second sensing yoke have different shapes from each other in terms of the position of the increased or decreased width.

14. The sensor shifting actuator according to claim 12, wherein, Each of the first and second sensing yokes has an hourglass shape, and The first sensing yoke and the second sensing yoke are spaced apart from each other.

15. The sensor shifting actuator according to claim 14, wherein, The hourglass shapes of the first sensing yoke and the second sensing yoke are different in size.

16. A camera module, including: A lens module includes a lens barrel, in which at least one lens is housed; A housing configured to accommodate the lens module; A focus adjustment driver configured to move the lens module in the optical axis direction; A sensor substrate on which an image sensor is disposed; A base, connected to the housing, the base being configured to accommodate the sensor substrate; as well as A jitter correction driver is configured to drive the image sensor in a first direction and a second direction orthogonal to the optical axis direction. The sensor substrate includes a movable portion configured to move together with the image sensor in the first direction and the second direction, a fixed portion connected to the base, and a connecting portion disposed between the movable portion and the fixed portion. The connecting portion is configured to surround the movable portion, and the fixed portion is configured to surround the connecting portion, and The connecting portion is configured to move together with the movable portion in either the first or the second direction.

17. The camera module according to claim 16, wherein, The sensor substrate further includes a first bridging portion configured to connect the fixed portion and the connecting portion to each other in the second direction, and a second bridging portion configured to connect the movable portion and the connecting portion to each other in the first direction. Each of the first bridging portion and the second bridging portion includes at least one electrical trace configured to transmit a signal to the outside of the image sensor.

18. The camera module of claim 16, further comprising: A reflective element is disposed in front of the lens module, the reflective element being configured to change the path of incident light to the lens module.

Images