Sensor shift module and camera module

Abstract

The present disclosure relates to a sensor shift module, including: a fixed body; a first movable body movably disposed in the fixed body and including an image sensor having an imaging surface opposite a first direction; and a driver configured to move the first movable body relative to the fixed body in a direction orthogonal to the first direction and including a drive coil and a drive yoke, the drive coil coupled to one of the fixed body and the first movable body, the drive yoke coupled to the other of the fixed body and the first movable body. The drive yoke is disposed opposite the drive coil in the direction orthogonal to the first direction. When a current is applied to the drive coil, the first movable body is configured to move in the direction orthogonal to the first direction by electromagnetic interaction between the drive coil and the drive yoke. The present disclosure also relates to a camera module.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of priority from Korean Patent Application No. 10-2021-0156565 filed in the Korean Intellectual Property Office on November 15, 2021, the disclosure of which is incorporated herein by reference in its entirety for all purposes. Technical Field

[0003] The following description relates to a camera module having a sensor shift module. Background Art

[0004] With the development of communication technology, mobile devices such as smartphones have become widely distributed. As a result, the demand for the functions of cameras included in mobile devices has also increased. For example, cameras included in mobile devices may be designed to provide advanced imaging functions (e.g., autofocus function, anti-shake function, etc.) implemented in ordinary DSLR cameras despite their small size.

[0005] An optical image stabilization function, namely an optical image stabilization (OIS) function, may be provided to prevent image blurring when the camera shakes during the exposure time, and the OIS function may be required when imaging in a low-light environment where the camera shakes and the exposure time is long. OIS may include digital IS (DIS), electronic IS (EIS), and optical IS (OIS). Among these functions, optical IS (OIS) can fundamentally prevent image degradation caused by shaking by correcting the optical path by moving the lens or image sensor in a direction orthogonal to the optical axis. Since a mechanical actuator may be required, implementation as a device may be complex, and although excellent compensation performance can be achieved, it is relatively expensive.

[0006] The lens barrel may include an optical system, which may require a relatively large amount of force to actuate the lens barrel. On the other hand, the image sensor can be relatively lightweight, facilitating excellent OIS functionality even with relatively low forces. However, when the actuator used to actuate the image sensor includes a permanent magnet, the magnetic field of the permanent magnet may affect nearby electronic components. Furthermore, when a mobile device includes multiple cameras positioned adjacent to each other, the permanent magnet in each camera may negatively affect the operation of adjacent cameras, making it functionally difficult to position the cameras adjacent to each other or to position other electronic components within a camera. Summary of the Invention

[0007] This Summary is intended to introduce some aspects of the inventive concepts, but it does not purport to be an exhaustive introduction to the inventive concepts or to determine key or essential inventive features. Its purpose is to present some concepts of the inventive concepts in a simplified form as a prelude to the more detailed description that is presented below in the

[0008] In one general aspect, a sensor shift module includes a fixed body, a first movable body movably disposed in the fixed body and including an image sensor having an imaging surface opposite a first direction, and a driver configured to move the first movable body relative to the fixed body in a direction orthogonal to the first direction and including a drive coil and a drive yoke, the drive coil coupled to one of the fixed body and the first movable body, and the drive yoke coupled to the other of the fixed body and the first movable body. The drive yoke is disposed opposite the drive coil in the direction orthogonal to the first direction. When a current is applied to the drive coil, the first movable body is configured to move in the direction orthogonal to the first direction by electromagnetic interaction between the drive coil and the drive yoke.

[0009] The drive yoke can be a soft magnetic material.

[0010] A magnetic field induced by the drive yoke can be zero when no current flows in the drive coil.

[0011] The drive coil and the drive yoke can be opposite each other in a second direction orthogonal to the first direction, and the electromagnetic interaction between the drive coil and the drive yoke can be configured to move the first movable body in the second direction.

[0012] The drive coil and the drive yoke can be opposite each other in a second direction orthogonal to the first direction. The drive coil can include a first drive coil and a second drive coil disposed on both sides of the first movable body in the second direction, respectively. The drive yoke can include a first drive yoke and a second drive yoke opposite the first drive coil and the second drive coil in the second direction, respectively.

[0013] The driver can further include a yoke disposed on a side of the drive coil, and the drive coil can be disposed between the drive yoke and the yoke.

[0014] The drive coil and the drive yoke can be opposite each other in a diagonal direction of the image sensor.

[0015] The sensor shift module can further include an elastic member disposed between the first movable body and the fixed body and configured to be deformed based on movement of the first movable body relative to the fixed body.

[0016] The elastic member can be a leaf spring.

[0017] The sensor shift module can further include a second movable body disposed between the first movable body and the fixed body, a first ball member disposed between the fixed body and the second movable body, and a second ball member disposed between the second movable body and the first movable body.

[0018] The fixed body and the second movable body can include a first groove configured to accommodate at least a portion of the first ball member, and the second movable body and the first movable body can include a second groove configured to accommodate at least a portion of the second ball member.

[0019] The first groove can extend in a second direction orthogonal to the first direction, and the second groove can extend in a third direction orthogonal to each of the first direction and the second direction.

[0020] The driver can further include a first magnet coupled to the second movable body, and a second magnet coupled to each of the first movable body and the fixed body opposite the first magnet.

[0021] The second magnet can include a through portion, and the driver can further include a position sensor disposed in the through portion.

[0022] In another general aspect, a camera module includes a lens module and a sensor shift module. The lens module includes a lens. The sensor shift module includes a fixed body, a first movable body movably disposed in the fixed body and including an image sensor opposite a first direction, and a driver configured to move the first movable body relative to the fixed body in a direction orthogonal to the first direction and including a drive coil and a drive yoke. The drive coil is coupled to one of the fixed body and the first movable body, and the drive yoke is coupled to the other of the fixed body and the first movable body. The drive yoke is disposed opposite the drive coil in the direction orthogonal to the first direction, and a space between the drive yoke and the drive coil is an air gap.

[0023] The drive yoke can be a soft magnetic material.

[0024] The camera module can further include an elastic member disposed between the first movable body and the fixed body and configured to be deformed based on movement of the first movable body relative to the fixed body.

[0025] Other features and aspects will become apparent from the following claims, drawings and detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 FIG. 1 is a diagram illustrating a camera module according to an exemplary embodiment of the present disclosure.

[0027] Figure 2is a diagram illustrating a sensor shift module according to an exemplary embodiment of the present disclosure.

[0028] Figure 3 is a diagram illustrating a traction device and a position sensor according to an exemplary embodiment of the present disclosure.

[0029] Figures 4A to 4C is a diagram illustrating an OIS driver according to an exemplary embodiment of the present disclosure.

[0030] Figures 5A to 5D It is shown that due to Figure 4A FIG. 1 is a diagram illustrating movement of the first movable body caused by the OIS driver.

[0031] Figure 6 is a diagram illustrating an example in which a unit driver is disposed in a diagonal direction of a driving direction of an image sensor according to an exemplary embodiment of the present disclosure.

[0032] Figures 7A to 7D It is shown that due to Figure 6 FIG. 1 is a diagram illustrating movement of the first movable body caused by the OIS driver.

[0033] Figure 8 is a diagram illustrating that an elastic member provides a restoring force to a first movable body according to an exemplary embodiment of the present disclosure.

[0034] Throughout the drawings and detailed description, the same reference numerals 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 sizes, proportions, and depictions of elements in the drawings may be exaggerated. DETAILED DESCRIPTION

[0035] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the method, device and / or system described herein. However, various changes, modifications and equivalences of the method, device and / or system described herein will be apparent after understanding the disclosure of the application. For example, the order of operations described herein is merely an example, and except for the operations that must occur in a specific order, it is not limited to the order set forth herein, but can be changed, which will be apparent after understanding the disclosure of the application. In addition, for greater clarity and brevity, the description of the features learned after understanding the disclosure of the application may be omitted.

[0036] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein are provided merely to illustrate some of the many possible ways to implement the methods, devices, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0037] Throughout the specification, where an element such as a layer, region, or substrate is described 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, where an element is described as being "directly on", "directly connected to", or "directly coupled to" another element, it is not present therebetween.

[0038] 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.

[0039] 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. Thus, a first element, a first component, a first region, a first layer, or a first section mentioned in one example can also be called a second element, a second component, a second region, a second layer, or a second section without departing from the teachings of examples described herein.

[0040] Spatially relative terms such as "on", "upper", "lower", "above", and "below" can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. These spatially relative terms are in no way limiting and are intended to encompass different positions of the device in use or operation in different orientations with the device. For example, if the device in the figures is turned over, elements described as "above" or "upper" relative to other elements or features would then be oriented "below" or "lower" relative to the other elements or features. Accordingly, the term "above" encompasses both positions depending on the orientation of the device. The device can be oriented in other ways (for example, rotated 90 degrees or at other orientations) and the spatially relative terms used herein interpreted accordingly.

[0041] The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. As used herein, the articles "a," "an," and "the" are intended to include one or more items, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and the like are meant to be inclusive and

[0042] Due to manufacturing techniques and / or tolerances, variations in shapes shown in the drawings can occur. Therefore, the examples described herein are not intended to be limited to the specific shapes illustrated, but include deviations in shapes that occur due to manufacturing techniques and / or tolerances.

[0043] Features of the examples described herein can be combined with features of other examples as would be apparent to one of ordinary skill in the art having the benefit of the disclosure, even though those features were not described in combination with other features. Furthermore, although exemplary examples have been described in some detail, those skilled in the art having benefit of the present disclosure will readily appreciate that other configurations can be substituted for those described and that not all of the disclosed examples need utilize the specific configurations or methodologies described above. Accordingly, applicants expressly reserve the right to use whatever substitute configuration and methodology they could reasonably choose.

[0044] In example embodiments, in the drawings, an X direction, a Y direction, and a Z direction can refer to a direction parallel to an X axis, a direction parallel to a Y axis, and a direction parallel to a Z axis, respectively. Also, unless otherwise indicated, the X direction can include a +X axis direction and a -X axis direction, and the same applies to the Y direction and the Z direction.

[0045] In example embodiments, two directions (or axes) that are parallel or orthogonal to each other can also include examples in which the two directions (or axes) are substantially parallel or substantially orthogonal to each other. For example, a configuration in which a first axis and a second axis are orthogonal to each other can mean that the first axis and the second axis can form an angle of 90 degrees or an angle close to 90 degrees.

[0046] "Example embodiments" do not necessarily have to be identical example embodiments. Particular features, structures, or characteristics can be combined in any suitable way.

[0047] In example embodiments, "configured to" can mean that a component can include a structure that enables a function.

[0048] Figure 1 FIG. 1 is a diagram illustrating components included in a camera module 1 according to an example embodiment.

[0049] In an example embodiment, the camera module 1 can include a lens module 20 including at least one lens 21 and a lens barrel 22 housing the at least one lens 21, and an image sensor 11. Light can pass through the lens module 20 and can reach an imaging surface of the image sensor 11. The camera module 1 can include an AF driver 23 that can move the lens module 20 in an optical axis direction to adjust a focal length. The AF driver 23 can include, for example, a coil and a magnet that are opposite to each other. The coil can be fixedly coupled to the lens module 20, the magnet can be coupled to a fixed body such as a housing, and electromagnetic interaction between the coil and the magnet can move the lens module 20 in the optical axis direction.

[0050] In an example embodiment, the camera module 1 can provide an optical image stabilization (hereinafter referred to as "OIS") function. The camera module 1 can provide the OIS function by driving the image sensor 11. For example, the camera module 1 can include an OIS driver 12 configured to move the image sensor 11 in a direction orthogonal to the optical axis, or to allow the image sensor 11 to rotate about an axis parallel to the optical axis, or to rotate about an axis perpendicular to the optical axis.

[0051] In an example embodiment, the camera module 1 can include a sensor shift module 10. The sensor shift module 10 can include components required to implement the OIS function by driving the image sensor 11. For example, the sensor shift module 10 can include the image sensor 11 and the OIS driver 12 for driving the image sensor 11. As another example, the sensor shift module 10 can refer only to the OIS driver 12 without including the image sensor 11.

[0052] In an example embodiment, the camera module 1 can include an optical element in addition to the lens module 20 and the image sensor 11. In an example embodiment, the camera module 1 can include two or more lens modules. For example, the first optical element 30 and / or the second optical element 40 can be a lens module different from the lens module 20.

[0053] In an example embodiment, the camera module 1 can include an optical path changing element disposed in front of the lens module 20. For example, the first optical element 30 can be implemented as a prism or a mirror. In another example embodiment, the optical path changing element can be disposed between the image sensor 11 and the lens module 20. For example, the second optical element 40 can be implemented as a prism or a mirror.

[0054] Hereinafter, Figures 2 to 8 The sensor shift module 100 or the OIS driver 120 described in Figure 1 the camera module 1 in

[0055] Figure 2 A sensor shift module 100 according to an exemplary embodiment is illustrated. The sensor shift module 100 can include an OIS driver 120 for driving an image sensor 111. In an exemplary embodiment, the OIS driver 120 can include a first movable body 110 including the image sensor 111 and a fixed body 130. The first movable body 110 is movably disposed in the fixed body 130. The first movable body 110 can be configured to move with the image sensor 111. For example, the first movable body 110 can include a sensor substrate 112 on which the image sensor 111 is mounted and a sensor bracket 113 coupled to the sensor substrate 112. Signals from the image sensor 111 can be transmitted to another electronic component (e.g., an image signal processor (ISP)) through the sensor substrate 112 and a connector 150.

[0056] The fixed body 130 can include a base 131 and components fixedly connected to the base 131. For example, the fixed body 130 can include a driving coil 122 and a magnetic yoke 123, which will be described later.

[0057] The first movable body 110 can be moved by the OIS driver 120 in a direction orthogonal to a direction in which an imaging face 111a of the image sensor 111 is directed. In an exemplary embodiment, the OIS driver 120 can compensate for a shake of a camera module 1 or an electronic device on which the image sensor 111 is mounted in a direction orthogonal to an optical axis O. The OIS driver 120 can move the image sensor 111 in a first direction and a second direction orthogonal to the optical axis O. As shown, the first direction and the second direction can cross each other. For example, the OIS driver 120 can move the first movable body 110 in an X direction and / or a Y direction orthogonal to a Z axis, so that a shake in the X direction and / or the Y direction can be corrected. Figure 2

[0058] ​In an exemplary embodiment, a direction in which the imaging surface 111a of the image sensor 111 is directed can be referred to as an optical axis O direction. That is, the first movable body 110 can move in a direction orthogonal to the optical axis O with respect to the fixed body 130. In the drawings, the optical axis O can be parallel to the Z axis; thus, the Z direction can refer to a direction parallel to the optical axis O. Also, the X direction or the Y direction can refer to a direction orthogonal to the optical axis O. For example, in an exemplary embodiment, a configuration in which the first movable body 110 can move in the X direction can mean that the first movable body 110 can move in a direction orthogonal to the optical axis O. For another example, a configuration in which the driving yoke 121 and the driving coil 122 are opposite each other in the X direction can mean that the driving yoke 121 and the driving coil 122 can be opposite each other in a direction orthogonal to the optical axis O. Also, the X direction or the Y direction can be an example of two directions orthogonal to the optical axis and intersecting each other, and in an exemplary embodiment, the X direction and the Y direction can be two directions orthogonal to the optical axis O and intersecting each other.

[0059] In an exemplary embodiment, the OIS driver 120 can include the second movable body 140 disposed between the first movable body 110 and the fixed body 130. The second movable body 140 can include the ball guide 141 and a component (e.g., the first magnet 124) fixedly coupled to the ball guide 141.

[0060] In an exemplary embodiment, the first ball member B1 can be disposed between the fixed body 130 and the second movable body 140, and the second ball member B2 can be disposed between the second movable body 140 and the first movable body 110.

[0061] Each of the fixed body 130 and the second movable body 140 can include a first groove G1 for accommodating at least a portion of the first ball member B1. Each of the second movable body 140 and the first movable body 110 can include a second groove G2 for accommodating at least a portion of the second ball member B2.

[0062] In an exemplary embodiment, the number of each of the first ball member B1, the second ball member B2, the first groove G1, and the second groove G2 can be described as one, but a plurality of each component can be provided.

[0063] The first and second grooves G1 and G2 can respectively extend in two directions orthogonal to the optical axis O and intersecting each other. For example, when the optical axis O is parallel to the Z axis, the first groove G1 can extend in the Y direction, and the second groove G2 can extend in the X direction. The first and second ball members B1 and B2 respectively move along the first and second grooves G1 and G2. Accordingly, the moving direction of the second movable body 140 with respect to the fixed body 130 can be limited to the Y direction, and the moving direction of the first movable body 110 with respect to the second movable body 140 can be limited to the X direction.

[0064] In Figure 2 , the first and second grooves G1 and G2 can be respectively formed only in the second movable body 140 and the first movable body 110, but exemplary embodiments thereof are not limited thereto. For example, the first groove G1 can be formed in the base 131 and the ball guide 141. Also, the second groove G2 can be formed in the ball guide 141 and the sensor holder 113.

[0065] The second movable body 140 or the ball guide 141 can not be essential components, and the first movable body 110 can directly move on the base 131. For example, in Figure 2 , the second movable body 140 can not be provided, a ball member can be provided between the sensor holder 113 and the base 131, and the sensor holder 113 and / or the base 131 can include a groove accommodating the ball member.

[0066] Figure 3 A traction device and a position sensor according to an exemplary embodiment are illustrated.

[0067] The first movable body 110 can only need to move in a direction orthogonal to the optical axis O, and can not need to move in a direction parallel to the optical axis O. To this end, the OIS driver 120 can include a traction device. The traction device can include the second magnets 125 and 126 and the first magnet 124 disposed opposite each other in the direction of the optical axis O. Magnetic attractive force can act between the first magnet 124 and the second magnets 125 and 126. For example, the first magnet 124 can be a permanent magnet, and the second magnets 125 and 126 can be magnetic yokes. As another example, the first magnet 124 and the second magnets 125 and 126 can be permanent magnets.

[0068] In an exemplary embodiment, the first magnet 124 can be coupled to the ball guide 141, and the 2-1 and 2-2 magnets 125 and 126 opposite the first magnet 124 in the Z direction can be respectively disposed in the sensor holder 113 and the base 131.

[0069] Referring to Figure 2 and Figure 3When the second movable body 140 is not provided, the magnets and the magnetic yokes can be mounted on the sensor bracket 113 or the base 131, respectively, such that the magnetic force between the components can pull the sensor bracket 113 toward the base 131 (i.e., the -Z direction).

[0070] Referring to Figure 3 In an exemplary embodiment, the OIS driver 120 can include position sensors 127 and 128 that can measure how much the first movable body 110 moves in a direction orthogonal to the optical axis O. The position sensors 127 and 128 can be configured as Hall sensors or magneto-resistive sensors.

[0071] The position sensors 127 and 128 can be disposed opposite the first magnet 124. For example, the position sensors 127 and 128 can be disposed on the sensor bracket 113 and / or the base 131 to be opposite the first magnet 124. In an exemplary embodiment, the position sensors 127 and 128 can be disposed in the second magnets 125 and 126. In an exemplary embodiment, the second magnets 125 and 126 can include through portions 125a and 126a, respectively, and the position sensors 127 and 128 can be disposed in the through portions 125a and 126a.

[0072] The first movable body 110 can move in the X direction with respect to the second movable body 140, and the first position sensor 127 disposed in the 2-1 magnet 125 can measure the displacement between the first movable body 110 and the second movable body 140 in the X direction. The second movable body 140 can move in the Y direction with respect to the fixed body 130, and the second position sensor 128 disposed in the 2-2 magnet 126 can measure the displacement between the fixed body 130 and the second movable body 140 in the Y direction.

[0073] The first position sensor 127 coupled to the first movable body 110 can be electrically connected to other electronic components through a flexible substrate. For example, a signal generated by the first position sensor 127 can be electrically connected to the connector 150 through a wire disposed on the sensor substrate 112.

[0074] Referring to Figure 2 In an exemplary embodiment, the OIS driver 120 can include a drive coil 122 coupled to one of the first movable body 110 and the fixed body 130 and a drive magnetic yoke 121 coupled to the other of the first movable body 110 and the fixed body 130. For example, referring to Figure 2In an exemplary embodiment, the driving coil 122 and the driving yoke 121 can be coupled to the base 131 and the sensor holder 113, respectively. The driving yoke 121 and the driving coil 122 can be opposite to each other in a direction orthogonal to the optical axis O. Electromagnetic interaction between the driving yoke 121 and the driving coil 122 can allow the first movable body 110 to move relative to the fixed body 130 in a direction orthogonal to the optical axis O.

[0075] In an exemplary embodiment, the OIS driver 120 can further include a yoke 123 disposed on one side of the coil. The yoke 123 can allow a magnetic field generated in the coil to be concentrated only in a direction toward the driving yoke 121. Since the yoke 123 is disposed on one side of the driving coil 122, it can be possible to prevent or reduce the influence of the magnetic field generated by the driving coil 122 on other electronic components.

[0076] In an exemplary embodiment, the driving coil 122 and the driving yoke 121 can be coupled to the fixed body 130 and the first movable body 110, respectively, but exemplary embodiments thereof are not limited thereto. In another exemplary embodiment, the driving coil 122 and the driving yoke 121 can be coupled to the first movable body 110 and the fixed body 130, respectively. For example, the driving coil 122 and the driving yoke 121 can be coupled to the sensor holder 113 and the base 131, respectively.

[0077] An air gap can be formed between the driving coil 122 and the driving yoke 121. Alternatively, the space between the driving coil 122 and the driving yoke 121 can be an air gap. That is, there can be no other member (e.g., a magnet) between the driving coil 122 and the driving yoke 121. The driving coil 122 and the driving yoke 121 can be directly opposite to each other with an air gap therebetween.

[0078] Figure 2 Components of the OIS driver 120 are illustrated, and exemplary embodiments thereof are not limited to Figure 2 the structure in FIG. 1.

[0079] In an exemplary embodiment, the OIS driver 120 can not include a permanent magnet. In an exemplary embodiment, when no current flows in the driving coil 122, the magnetic field induced by the driving yoke 121 can be zero or at a very small level. Accordingly, it can be possible to prevent or reduce the influence of the magnetic field induced by the OIS driver 120 on other electronic components (e.g., other electronic components in the camera module 1).

[0080] In an exemplary embodiment, the driving yoke 121 can be a soft magnetic material. The soft magnetic material can have a small coercivity and can be magnetized when exposed to a magnetic field, but can have a relatively low level of magnetism or can lose magnetism when the magnetic field disappears.

[0081] When a current is applied to the driving coil 122, the driving yoke 121 can be magnetized so that a magnetic resistance force can be generated between the driving coil 122 and the driving yoke 121. An attractive force can be generated in a direction in which the driving yoke 121 and the driving coil 122 are opposite to each other, and the attractive force can move the first movable body 110 in a corresponding direction with respect to the fixed body 130. For example, referring to Figure 4A When a current is applied to the first driving coil 122a, an attractive force can be generated between the first driving coil 122a and the first driving yoke 121a, and the first movable body 110 can be moved in the -X direction. When a current is applied to the second driving coil 122b, an attractive force can be generated between the second driving coil 122b and the second driving yoke 121b, thereby moving the first movable body 110 in the +X direction.

[0082] Figures 4B to 4C is a diagram illustrating an OIS driver 120 according to an exemplary embodiment, which illustrates a ball member and a groove arranged differently from the example in Figure 4A , and descriptions of other components can be the same as described with reference to Figure 4A .

[0083] The OIS driver 120 can include a plurality of unit drivers 120a, 120b, 120c, and 120d. The unit drivers 120a, 120b, 120c, and 120d can include a driving yoke 121 and a driving coil 122 opposite to each other. The unit drivers 120a, 120b, 120c, and 120d can further include a yoke 123 disposed on one side of the driving coil 122. For example, the first unit driver 120a can include a first driving yoke 121a, a first driving coil 122a, and a first yoke 123a.

[0084] Since only an attractive force is generated between the driving coil 122 and the driving yoke 121, at least two unit drivers can be required to move the first movable body 110 back and forth in one direction.

[0085] Referring to Figure 4AThe OIS driver 120 can include a first unit driver 120a disposed in the -X direction of the first movable body 110 and a second unit driver 120b disposed in the +X direction of the first movable body 110 to compensate for the shake in the X direction. The first unit driver 120a can include a first driving yoke 121a coupled to the first movable body 110 and a first driving coil 122a coupled to the base 131. The first unit driver 120a can further include a first yoke 123a disposed on one side of the first driving coil 122a. The second unit driver 120b can include a second driving yoke 121b coupled to the first movable body 110 and a second driving coil 122b coupled to the base 131. The second unit driver 120b can further include a second yoke 123b disposed on one side of the second driving coil 122b.

[0086] Referring to Figure 4A The OIS driver 120 can include a third unit driver 120c disposed in the +Y direction of the first movable body 110 and a fourth unit driver 120d disposed in the -Y direction of the first movable body 110 to compensate for the shake in the Y direction. The third unit driver 120c can include a third driving yoke 121c coupled to the first movable body 110 and a third driving coil 122c coupled to the base 131. The third unit driver 120c can further include a third yoke 123c disposed on one side of the third driving coil 122c. The fourth unit driver 120d can include a fourth driving yoke 121d coupled to the first movable body 110 and a fourth driving coil 122d coupled to the base 131. The fourth unit driver 120d can further include a fourth yoke 123d disposed on one side of the fourth driving coil 122d.

[0087] Referring to Figure 4A The first and second grooves G1 and G2 for guiding the first and second ball members B1 and B2 and the first and second ball members B1 and B2 can be disposed adjacent to the corner 113a of the sensor holder 113. The first groove G1 for accommodating the first ball member B1 and the first ball member B1 can be disposed adjacent to the corner 113a of the sensor holder 113, and the second groove G2 for accommodating the second ball member B2 and the second ball member B2 can also be disposed adjacent to the corner 113a of the sensor holder 113. Referring to Figure 4A The first and second grooves G1 and G2 can overlap each other in the optical axis O direction.

[0088] Referring to Figure 4B, the first ball member B1 and the second ball member B2 and the first groove G1 and the second groove G2 can be disposed between two adjacent corner portions 113a. The first ball member B1 and the second ball member B2 and the first groove G1 and the second groove G2 can be disposed adjacent to the center of the side surface 113b connecting the two adjacent corner portions 113a to each other. For example, the second ball member B2 and the second groove G2 partially accommodating the second ball member B2 can be disposed adjacent to the center of the side surface 113b of the sensor holder 113. As shown in Figure 4B , the first ball member B1 and the first groove G1 can be disposed adjacent to both ends of the side surface 113b of the sensor holder 113. In Figure 4B , the first groove G1 and the second groove G2 can not overlap in the optical axis O direction. Accordingly, the rigidity of the ball guide 141 including the first groove G1 and the second groove G2 can be improved.

[0089] Referring to Figure 4C , three first ball members B1-1, B1-2, and B1-3 can be disposed between the second movable body 140 and the fixed body 130. Two first ball members B1-1 and B1-2 among the three first ball members B1-1, B1-2, and B1-3 can be disposed adjacent to both ends of one side surface 113b-1 of the sensor holder 113 (for example, a side surface oriented in the -X direction), and the other first ball member B1-3 can be disposed adjacent to the center of the other side surface 113b-2 (for example, a side surface oriented in the +X direction). Accordingly, the second movable body 140 can be supported at three points by the first ball members B1-1, B1-2, and B1-3.

[0090] Referring to Figure 4C , three second ball members B2-1, B2-2, and B2-3 can be disposed between the first movable body 110 and the second movable body 140. Two second ball members B2-1 and B2-2 among the three second ball members B2-1, B2-2, and B2-3 can be disposed adjacent to both ends of one side surface 113b-2 of the sensor holder 113 (for example, a side surface oriented in the +X direction), and the other second ball member B2-3 can be disposed adjacent to the center of the other side surface 113b-1 (for example, a side surface oriented in the -X direction). Accordingly, the first movable body 110 can be supported at three points by the second ball members B2-1, B2-2, and B2-3.

[0091] Figures 5A to 5D is a diagram illustrating movement of the first movable body due to the OIS driver in Figure 4A .

[0092] Referring to Figure 5AA current can be applied to the first driving coil 122a so that the first driving coil 122a can pull the first driving yoke 121a in the arrow direction, and thus, the first movable body 110 can move in the -X direction. Referring to Figure 5B A current can be applied to the second driving coil 122b so that the second driving coil 122b can pull the second driving yoke 121b in the arrow direction, and thus, the first movable body 110 can move in the +X direction. Referring to Figure 5C A current can be applied to the third driving coil 122c so that the third driving coil 122c can pull the third driving yoke 121c in the arrow direction, and thus, the first movable body 110 can move in the +Y direction. Referring to Figure 5D A current can be applied to the fourth driving coil 122d so that the fourth driving coil 122d can pull the fourth driving yoke 121d in the arrow direction, and thus, the first movable body 110 can move in the -Y direction.

[0093] Figure 6 FIG. 7 is a diagram illustrating an example in which unit drivers 120a, 120b, 120c, and 120d according to an exemplary embodiment are disposed in diagonal directions of a driving direction of an image sensor.

[0094] In an exemplary embodiment, the first movable body 110 can move in two directions orthogonal to an optical axis and orthogonal to each other. For example, the first movable body 110 can move in an X direction and a Y direction. The OIS driver 120 can allow the first movable body 110 to move in a first direction OIS-X parallel to a horizontal side 111c of the image sensor 111 and in a second direction OIS-Y parallel to a vertical side 111d of the image sensor 111. For example, referring to Figure 6 The image sensor 111 can include a horizontal side 111c extending in the X direction and a vertical side 111d extending in the Y direction, and the first groove G1 and the second groove G2 can extend in the Y direction and the X direction, respectively.

[0095] Referring to Figure 6 The unit drivers 120a, 120b, 120c, and 120d can be disposed in two directions D1 and D2 orthogonal to an optical axis O and orthogonal to each other. For example, the first unit driver 120a and the second unit driver 120b can be disposed on both sides of the image sensor 111 in a first diagonal direction D1. The third unit driver 120c and the fourth unit driver 120d can be disposed on both sides of the image sensor 111 in a second diagonal direction D2.

[0096] In an exemplary embodiment, when the OIS driver 120 is configured to move the first movable body 110 in the first direction OIS-X and the second direction OIS-Y, the drive coil 122 and the drive yoke 121 can face each other in a direction between the first direction OIS-X and the second direction OIS-Y. For example, when the OIS driver 120 is configured to move the first movable body 110 in the X direction and the Y direction, the drive coil 122 and the drive yoke 121 can face each other in diagonal directions D1 and D2 forming a 45-degree angle with the X axis or the Y axis.

[0097] Even when the unit drivers 120a, 120b, 120c, and 120d are disposed as shown in Figure 6 , the first groove G1 and the second groove G2 for guiding the first ball member B1 and the second ball member B2 and the first ball member B1 and the second ball member B2 can be disposed as shown in Figure 4B or Figure 4C .

[0098] Figures 7A to 7D is a diagram showing movement of the first movable body due to the OIS driver in Figure 6 .

[0099] Referring to Figure 7A , a current can be applied to the first drive coil 122a and the fourth drive coil 122d so that the first drive coil 122a and the fourth drive coil 122d can pull the first drive yoke 121a and the second drive yoke 121b in the arrow direction, and thus, the first movable body 110 can move in the -X direction. Referring to Figure 7B , a current can be applied to the second drive coil 122b and the third drive coil 122c so that the second drive coil 122b and the third drive coil 122c can pull the second drive yoke 121b and the third drive yoke 121c in the arrow direction, and thus, the first movable body 110 can move in the +X direction. Referring to Figure 7C , a current can be applied to the first drive coil 122a and the third drive coil 122c so that the first drive coil 122a and the third drive coil 122c can pull the first drive yoke 121a and the third drive yoke 121c in the arrow direction, and thus, the first movable body 110 can move in the +Y direction. Referring to Figure 7D , a current can be applied to the second drive coil 122b and the fourth drive coil 122d so that the second drive coil 122b and the fourth drive coil 122d can pull the second drive yoke 121b and the fourth drive yoke 121d in the arrow direction, and thus, the first movable body 110 can move in the -Y direction.

[0100] Figure 8is a diagram illustrating an elastic member providing a restoring force to the first movable body according to an exemplary embodiment.

[0101] Referring to Figure 8 The OIS driver 120 can include an elastic member 160 providing a restoring force to the first movable body 110. The elastic member 160 can be disposed between the first movable body 110 and the fixed body 130, and when the first movable body 110 moves in one direction, the elastic member 160 can be deformed and can provide a restoring force to the first movable body 110.

[0102] In an exemplary embodiment, the elastic member 160 can be a leaf spring. In this case, both ends of the elastic member 160 can be fixed to the fixed body 130, and can have a curved shape bent toward the first movable body 110.

[0103] In an exemplary embodiment, four elastic members 161, 162, 163, and 164 can be disposed to face each of the four side surfaces of the first movable body 110. For example, when the first movable body 110 moves in the -X direction, the first elastic member 161 is compressed and pushes the first movable body 110 in the +X direction. When the first movable body 110 moves in the +X direction, the second elastic member 162 can be compressed and can push the first movable body 110 in the -X direction. When the first movable body 110 moves in the +Y direction, the third elastic member 163 can be compressed and can push the first movable body 110 in the -Y direction. When the first movable body 110 moves in the -Y direction, the fourth elastic member 164 can be compressed and can push the first movable body 110 in the +Y direction.

[0104] According to the above-described exemplary embodiment, a camera can provide an effective optical image stabilization with low power. Alternatively, according to the exemplary embodiment, the influence of a magnetic field of an actuator driving an image sensor on electronic components disposed outside the camera can be eliminated or reduced.

[0105] While the present disclosure includes specific examples, it will be apparent to one skilled in the art, after an understanding of the disclosure herein, that various changes in form and details can be made without departing from the spirit and scope of the claims and their equivalents. The examples described herein are to be considered in a descriptive sense only and not for purposes of limitation. Descriptions of features or aspects in each example should be considered as being applicable to similar features or aspects in other examples. If implementation of the described techniques, in different orders and / or if combined with and / or substituted for other systems, architectures, devices, or circuitry, still falls within the scope of the claims and their equivalents, then appropriate results still can be achieved. Therefore, the scope of the present disclosure is defined not by the specific embodiments discussed, but by the appended 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 present disclosure.

Claims

1. Sensor shift module, including: fixed body; a first movable body movably disposed in the fixed body and comprising an image sensor and a sensor substrate on which the image sensor is mounted, the image sensor having an imaging surface opposite to the first direction; a second movable body, disposed between the first movable body and the fixed body; a first ball member disposed between the fixed body and the second movable body; a second ball member disposed between the second movable body and the first movable body; and a driver configured to move the first movable body and the second movable body in a direction orthogonal to the first direction relative to the fixed body, and including a drive coil and a drive yoke, the drive coil being coupled to one of the fixed body and the first movable body, and the drive yoke being coupled to the other of the fixed body and the first movable body, wherein the driving yoke is arranged to be opposite to the driving coil in the direction orthogonal to the first direction, and wherein, when current is applied to the drive coil, the first movable body is configured to move in the direction orthogonal to the first direction by electromagnetic interaction between the drive coil and the drive yoke.

2. The sensor displacement module according to claim 1, wherein: The driving yoke is made of soft magnetic material.

3. The sensor displacement module according to claim 1, wherein: When no current flows in the driving coil, the magnetic field caused by the driving yoke is zero.

4. The sensor displacement module according to claim 1, wherein: The drive coil and the drive yoke are opposed to each other in a second direction orthogonal to the first direction, and electromagnetic interaction between the drive coil and the drive yoke is configured to move the first movable body in the second direction.

5. The sensor displacement module according to claim 1, wherein: The drive coil and the drive yoke are opposite to each other in a second direction orthogonal to the first direction, the drive coil includes a first drive coil and a second drive coil, the first drive coil and the second drive coil are respectively arranged on both sides of the first movable body in the second direction, and the drive yoke includes a first drive yoke and a second drive yoke, the first drive yoke and the second drive yoke are respectively opposite to the first drive coil and the second drive coil in the second direction. The sensor displacement module according to claim 1 , wherein: The driver further includes a yoke provided on one side of the driving coil, and the driving coil is provided between the driving yoke and the yoke.

7. The sensor displacement module according to claim 1, wherein: The driving coil and the driving yoke are opposite to each other in a diagonal direction of the image sensor.

8. The sensor shift module according to claim 1, further comprising: An elastic member is provided between the first movable body and the fixed body and is configured to be deformed based on the movement of the first movable body relative to the fixed body.

9. The sensor displacement module according to claim 8, wherein: The elastic member is a leaf spring.

10. The sensor displacement module according to claim 1, wherein: The fixed body and the second movable body include a first groove configured to accommodate at least a portion of the first ball member, and the second movable body and the first movable body include a second groove configured to accommodate at least a portion of the second ball member.

11. The sensor displacement module according to claim 10, wherein: The first groove extends in a second direction orthogonal to the first direction, and the second groove extends in a third direction orthogonal to each of the first direction and the second direction.

12. The sensor displacement module according to claim 1, wherein: The driver further includes a first magnet coupled to the second movable body and a second magnet coupled to each of the first movable body and the fixed body opposite to the first magnet.

13. The sensor displacement module according to claim 12, wherein: The second magnet includes a through portion, and the driver further includes a position sensor disposed in the through portion.

14. Camera module, including: A lens module, comprising a lens; as well as Sensor shift module, including: fixed body; a first movable body movably provided in the fixed body and comprising an image sensor opposite to the first direction and a sensor substrate on which the image sensor is mounted; a second movable body, disposed between the first movable body and the fixed body; a first ball member disposed between the fixed body and the second movable body; a second ball member disposed between the second movable body and the first movable body; and a driver configured to move the first movable body and the second movable body in a direction orthogonal to the first direction relative to the fixed body, and including a drive coil and a drive yoke, the drive coil being coupled to one of the fixed body and the first movable body, and the drive yoke being coupled to the other of the fixed body and the first movable body, The driving yoke is arranged to be opposite to the driving coil in the direction orthogonal to the first direction, and a space between the driving yoke and the driving coil is an air gap.

15. The camera module according to claim 14, wherein: The driving yoke is made of soft magnetic material.

16. The camera module according to claim 14, further comprising: An elastic member is provided between the first movable body and the fixed body and is configured to be deformed based on the movement of the first movable body relative to the fixed body.

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