Patent Publication Number: US-2021173223-A1

Title: Camera module

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application claims the benefit under 35 USC 119(a) of Korean Patent Application No. 10-2019-0164032 filed on Dec. 10, 2019 in the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference for all purposes. 
     BACKGROUND 
     1. Field 
     This application relates to a camera module. 
     2. Description of Related Art 
     The use of subminiature camera modules in mobile communications terminals such as smartphones, tablet PCs, laptop computers, and the like, has increased. 
     With the miniaturization of mobile communications terminals, the quality of images obtained by such terminals may be degraded because such terminals are often held by hand while images are captured. To obtain clear images despite instability introduced into images due to the inadvertent shaking of hands holding the terminals, a technology that compensates for the effect of shaking is required. 
     An actuator for optical image stabilization (OIS) may be used to compensate for involuntary shaking introduced due to instability of hands holding the terminals. An OIS actuator may move a lens module in a direction, perpendicular to an optical axis direction, to compensate for the involuntary shaking. 
     A structure, in which a plurality of cameras including a wide-angle camera and a telephoto camera are mounted adjacent to a mobile terminal, has been implemented to improve the performance of camera functions. 
     However, when an OIS actuator using a magnet and a coil is employed for miniaturization and accuracy in driving, performance is deteriorated due to self-interference between camera modules adjacent to each other. 
     SUMMARY 
     This Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter. 
     An actuator having a structure provided with a magnet and a coil. 
     A structure, capable of significantly reducing leakage of a magnetic field while employing an actuator using a magnetic field and a coil for miniaturization and accurate driving. 
     A camera module that significantly reduces self-interference such that a plurality of camera modules may be freely arranged even when they are disposed adjacent to each other. 
     In one general aspect, a camera module includes a carrier supported on a housing and movable in an optical axis direction, a frame supported on the carrier and movable, relative to the carrier, in a first direction, perpendicular to the optical axis direction, and a lens module supported on the frame and movable, relative to the frame, in a second direction, perpendicular to the optical axis direction. One of the frame and the lens module is supported such that attractive force acts in one of the first direction and the second direction. 
     The other of the frame and the lens module may be arranged such that attractive force does not act between a relative member and the frame in one of the first direction and the second direction. 
     The other of the frame and the lens module may be arranged such that attractive force acts between a relative member and the frame in the optical axis direction. 
     The other of the frame and the lens module may include a driving magnet, and the driving magnet may be arranged to have an interval with a yoke, disposed on the relative member, in the optical axis direction. 
     The housing may include a side surface on which one of the frame and the lens module is supported, and a yoke formed of a material configured to prevent leakage of a magnetic field may be disposed on the side surface. 
     The frame may be supported such that attractive force acts with respect to the carrier in one of the first direction and the second direction, and the lens module maybe supported such that attractive force acts with respect to the frame in the optical axis direction. 
     The frame may include a first magnet, the housing may include a first yoke, and the first magnet and the first yoke may be arranged to have an interval in the second direction. 
     The frame may include a first magnet, and the first magnet may be magnetized along a surface opposing the carrier in one of the first direction and the second direction to have at least an N-pole and an S-pole. 
     The lens module may include a second magnet, and a surface of the second magnet opposing the carrier may be magnetized to a single pole or a plurality of poles. 
     The frame may include a first magnet and the lens module may include a second magnet, the first magnet may generate force such that the frame is moved relatively in a direction parallel to a surface opposing the carrier by interaction with a first coil, and the second magnet may generate force such that the lens module is moved relatively in a direction perpendicular to a surface opposing the frame by interaction with a second coil. 
     The first magnet and the second magnet may be disposed to oppose each other about an optical axis. 
     The lens module may include a second magnet to generate force to move the lens module, and one of a third magnet, independent of the second magnet, and a third yoke, and the frame may include the other of the third magnet and the third yoke to oppose the third magnet or the third yoke in the optical axis direction. 
     The camera module may include three rolling members disposed between the lens module and a surface of the frame in the optical axis direction, and the second magnet may be disposed between two rolling members, among the three rolling members, and the third magnet or the third yoke may be disposed closest to the other rolling member. 
     The three rolling members may be disposed to approximately form a right triangle. 
     In another general aspect, a camera module includes a carrier supported on a housing and movable in an optical axis direction, a frame supported on the carrier and including a first magnet movable, relative to the carrier, in a first direction perpendicular to the optical axis direction, and a lens module supported on the frame and including a second magnet movable, relative to the frame, in a second direction perpendicular to the optical axis direction. One of the first magnet and the second magnet is magnetized along a surface opposing a relative member in one of the first direction and the direction to have at least an N-pole and an S-pole. The other of the first magnet and the second magnet is magnetized such that the surface opposing the relative member has a single pole or a plurality of poles. 
     In another general aspect, a camera module includes an autofocusing part including a carrier disposed on a housing to be movable in an optical axis direction, a shake correction portion including a lens module to be movable, relative to the carrier, in a direction perpendicular to the optical axis direction, and an autofocusing coil to provide driving force to the autofocusing part, and first and second shake correction coils to provide driving force to the shake correction portion. The autofocusing coil and the first and second shake correction coils are each disposed on a surface of the housing disposed to be parallel to the optical axis direction. The housing includes a plurality of yokes, respectively covering the autofocusing coil and one of the first and second shake correction coils to prevent leakage of a magnetic field. 
     In another general aspect, a camera module includes a frame including a first magnet to generate force to move the frame along a first direction perpendicular to an optical axis; a lens holder coupled to the frame and including a second magnet to generate force to move the lens holder relative to the frame along a second direction perpendicular to the optical axis, the second magnet being disposed opposite to the first magnet across the optical axis; and a lens barrel fixed to the lens holder to be moved along the first direction by movement of the frame and to be moved along the second direction by movement of the lens holder relative to the frame. 
     One of the first magnet and the second magnet may be a polarizing magnet, and the other of the first magnet and the second magnet may be a single pole magnet. 
     The camera module may include a first coil disposed to face the first magnet along the first direction; and a second coil disposed to face the second magnet along the first direction. 
     The camera module may include a first yoke disposed to oppose the first magnet along the first direction such that the first coil is interposed between the first yoke and the first magnet; and a second yoke disposed to oppose the second magnet in a direction parallel to the optical axis. 
     Other features and aspects will be apparent from the following detailed description, the drawings, and the claims. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is an assembled perspective view of a camera module according to an example. 
         FIG. 2  is an exploded perspective view of a camera module according to an example. 
         FIG. 3  is an exploded perspective view of a housing and a carrier according to an example. 
         FIG. 4  is an exploded perspective view of a housing, a carrier, a frame, and a lens module according to an example. 
         FIG. 5  is an assembled perspective view of a housing, a carrier, a frame, and a lens module according to an example. 
         FIG. 6  is an exploded perspective view of a housing, a carrier, a frame, and a lens holder according to an example, when viewed from above. 
         FIG. 7  is an exploded perspective view of a housing, a carrier, a frame, and a lens holder according to an example, when viewed from below. 
     
    
    
     Throughout the drawings and the detailed description, the same reference numerals refer to the same elements. The drawings may not be to scale, and the relative size, proportions, and depiction of elements in the drawings may be exaggerated for clarity, illustration, and convenience. 
     DETAILED DESCRIPTION 
     The following detailed description is provided to assist the reader in gaining a comprehensive understanding of the methods, apparatuses, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatuses, and/or systems described herein will be apparent to one of ordinary skill in the art. The sequences of operations described herein are merely examples, and are not limited to those set forth herein, but may be changed as will be apparent to one of ordinary skill in the art, with the exception of operations necessarily occurring in a certain order. Also, descriptions of functions and constructions that would be well known to one of ordinary skill in the art may be omitted for increased clarity and conciseness. 
     The features described herein may be embodied in different forms, and are not to be construed as being limited to the examples described herein. Rather, the examples described herein have been provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to one of ordinary skill in the art. 
     Herein, it is noted that use of the term “may” with respect to an example or embodiment, e.g., as to what an example or embodiment may include or implement, means that at least one example or embodiment exists in which such a feature is included or implemented while all examples and embodiments are not limited thereto. 
     Throughout the specification, when an element, such as a layer, region, or substrate, is described as being “on,” “connected to,” or “coupled to” another element, it may be directly “on,” “connected to,” or “coupled to” the other element, or there may be one or more other elements intervening therebetween. In contrast, when an element is described as being “directly on,” “directly connected to,” or “directly coupled to” another element, there can be no other elements intervening therebetween. 
     As used herein, the term “and/or” includes any one and any combination of any two or more of the associated listed items. 
     Although terms such as “first,” “second,” and “third” may be used herein to describe various members, components, regions, layers, or sections, these members, components, regions, layers, or sections are not to be limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or section from another member, component, region, layer, or section. Thus, a first member, component, region, layer, or section referred to in examples described herein may also be referred to as a second member, component, region, layer, or section without departing from the teachings of the examples. 
     Spatially relative terms such as “above,” “upper,” “below,” and “lower” may be used herein for ease of description to describe one element&#39;s relationship to another element as shown in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, an element described as being “above” or “upper” relative to another element will then be “below” or “lower” relative to the other element. Thus, the term “above” encompasses both the above and below orientations depending on the spatial orientation of the device. The device may also be oriented in other ways (for example, rotated 90 degrees or at other orientations), and the spatially relative terms used herein are to be interpreted accordingly. 
     The terminology used herein is for describing various examples only, and is not to be used to limit the disclosure. The articles “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms “comprises,” “includes,” and “has” specify the presence of stated features, numbers, operations, members, elements, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, numbers, operations, members, elements, and/or combinations thereof. 
     Due to manufacturing techniques and/or tolerances, variations of the shapes shown in the drawings may occur. Thus, the examples described herein are not limited to the specific shapes shown in the drawings, but include changes in shape that occur during manufacturing. 
     The features of the examples described herein may be combined in various ways as will be apparent after an understanding of the disclosure of this application. Further, although the examples described herein have a variety of configurations, other configurations are possible as will be apparent after an understanding of the disclosure of this application. 
     Hereinafter, while examples of the present disclosure will be described in detail with reference to the accompanying drawings, it is noted that examples are not limited to the same. 
     The present disclosure relates to a camera module, and may be applied to portable electronic devices such as mobile communications terminals, smartphones, table PCs, and the like. 
     A camera module is an optical device for capturing still or moving images. A camera module may include a lens, refracting light reflected from a subject, and a lens driving device moving the lens to adjust a focus or to compensate for the shaking of the camera module while images are captured. 
       FIG. 1  is an assembled perspective view of a camera module according to an example, and  FIG. 2  is an exploded perspective view of a camera module according to an example. 
     Referring to  FIGS. 1 and 2 , a camera module  1000  may include a housing  1100 , a lens module  1500  including a lens barrel  1510  accommodated in the housing  1100 , a lens driving device moving the lens module  1500 , and an image sensor unit  1150  converting light, incident through the lens barrel  1510 , into an electrical signal. The camera module  1000  may further include a case  1110  or an upper cover  1301  covering the housing  1100  from above. 
     The lens barrel  1510  may be a hollow cylindrical shape allowing a plurality of lenses for capturing a subject to be accommodated therein (the configuration is not limited thereto, and the lens barrel  1510  may have a partially cut exterior, and the inside of the lens barrel  1510  may be provided with a circular lens or a D-cut lens, a lens having one partially cut side), and a plurality of lenses are mounted in the lens barrel  1510 . The plurality of lenses is arranged in an amount as large as necessary depending on a design of the lens barrel  1510 , and each of the plurality of lenses has the same or different optical characteristics such as the a refractive index, or the like. 
     The lens driving device moves the lens barrel  1510  in an optical axis direction or a direction perpendicular to the optical axis direction. 
     As an example, the lens driving device may move the lens barrel  1510  in an optical axis direction (a Z-axis direction) to adjust a focus, and may move the lens barrel  1510  in X-axis and Y-axis directions, perpendicular to the optical axis direction (the Z-axis direction), to correct shaking at the time of capturing an image. 
     The lens driving device includes a focusing unit (an autofocusing part) and a shake correction unit (a shake correction portion). 
     The image sensor unit  1150  converts light, incident through the lens barrel  1510 , into an electrical signal. 
     As an example, the image sensor unit  1150  may include an image sensor  1151  and a printed circuit board (PCB)  1153  connected to the image sensor  1151 , and may further include an infrared filter. 
     The lens module  1500 , including the lens barrel  1510 , and the lens driving device are accommodated in the housing  1100 . 
     As an example, the housing  1100  has a shape with an open top and bottom, and the lens module  1500  and the lens driving device may be accommodated in an internal space of the housing  1100 . The image sensor unit  1150  is disposed below the housing  1100 . 
     The case  1110  is coupled to the housing  1100  to surround an external surface of the housing  1100 , and serves to protect internal components of the camera module  1000 . The case  1110  may serve to shield electromagnetic waves. 
     As an example, the case  1100  may shield electromagnetic waves generated by the camera module  1000  such that electromagnetic waves do not affect other electronic components in the portable electronic device. 
     Since a portable electronic device is equipped with various electronic components other than the camera module  1000 , the case  1100  may shield electromagnetic waves generated by such electronic components such that the electromagnetic waves do not affect the camera module  1000 . 
     Referring to  FIGS. 2 and 3 , the focusing unit of the lens driving device according to an example is illustrated. 
     The lens driving device includes a focusing unit, moving a carrier  1300  in an optical axis direction to perform autofocusing, and a shake correction unit moving the lens module  1500  disposed inside of the carrier  1300  in a direction perpendicular to the optical axis direction, to perform shake correction. 
     The focusing unit has a structure generating driving force to move the carrier  1300 , accommodating the lens module  1500 , in the optical axis direction (the Z-axis direction). 
     A driving portion of the focusing unit includes a magnet  1320  and a coil  1330 . The magnet  1320  is mounted on the carrier  1300 . As an example, the magnet  1320  may be mounted on one surface of the carrier  1300 . 
     The coil  1330  is mounted in the housing  1100 . As an example, the coil  1330  may be mounted in the housing  1100  through a substrate  1130 . The coil  1330  may be fixed to the substrate  1130 , and the substrate  1130  may be fixed to the housing  1100  in a state in which fixing driving coils of the shake correction unit to described later are also fixed together. 
     The magnet  1320  is a movable member mounted on the carrier  1300  to move in the optical axis direction (the Z-axis direction) together with the carrier  1300 , and the coil  1330  is a fixed member fixed to the housing  1100 . However, the configuration is not limited thereto, and positions of the magnet  1320  and the coil  1330  are interchangeable with each other. 
     When power is applied to the coil  1330 , the carrier  1300  may be moved in the optical axis direction (the Z-axis direction) by electromagnetic interaction between the magnet  1320  and the coil  1330 . 
     Since the lens barrel  1510  is accommodated in the carrier  1300 , the lens barrel  1510  is also moved in the optical axis direction (the Z-axis direction) by the movement of the carrier  1300 . 
     When the carrier  1300  is moved, a rolling member  1370  is disposed between the carrier  1300  and the housing  1100  to reduce friction between the carrier  1300  and the housing  1100 . The rolling member  1370  may have a ball shape. Rolling members  1370  may be disposed on both sides of the magnet  1320 . 
     A yoke  1350  is disposed in the housing  1100 . For example, the yoke  1350  is disposed to oppose the magnet  1320  with the coil  1330  interposed therebetween. For example, the coil  1330  and the magnet  1320  are disposed to oppose each other, and the yoke  1350  is disposed on a rear surface of the coil  1330  such that the carrier  1300  is closely supported on the housing  1100  with the rolling member  1370  interposed therebetween. 
     Attractive force acts between the yoke  1350  and the magnet  1320  in a direction perpendicular to the optical axis direction (the Z-axis direction). Accordingly, the rolling member  1370  may be maintained in a state of contact with the carrier  1300  and the housing  1100  by the attractive force between the yoke  1350  and the magnet  1320 . 
     The yoke  1350  may also serve to focus magnetic force of the magnet  1320 , and may prevent magnetic flux from leaking outwardly. 
     The example uses a closed loop control method in which a position of the lens barrel  1510 , in further detail, the carrier  1300 , is detected and feed-backed. 
     Accordingly, a position sensor  1360  is required for closed loop control. The position sensor  1360  may be a hall sensor. 
     The position sensor  1360  is disposed inside or outside of the coil  1330 . The position sensor  1360  may be mounted on the substrate  1130  on which the coil  1330  is mounted. 
     A magnet and a coil may be additionally provided to secure sufficient driving force during focusing. When an area, in which a magnet is mounted, is reduced with the trend for slimming of a camera module, a size of the magnet is decreased, and thus, sufficient driving force required for focusing may not be secured. 
     According to the present example, although not illustrated, magnets may be respectively attached to the different surface of the carrier  1300  and coils may be respectively provided on different surfaces of the housing  1100  to oppose the magnet. Thus, sufficient driving force for focusing may be secured even when a camera module is slimmed. 
     Referring to  FIGS. 2 to 7 , a shake correction unit of the lens driving device according to an example is illustrated. 
     The lens driving device includes a focusing unit, moving the carrier  1300  in an optical axis direction to perform focusing, and a shake correction unit moving the lens module  1500  disposed inside of the carrier  1300  in a direction perpendicular to the optical axis direction, to perform shake correction. 
     The shake correction unit has a structure generating driving force to move the lens module  1500 , accommodated in the carrier  1300 , in a first direction (an X-axis direction) and a second direction (a Y-axis direction), perpendicular to the optical axis direction (the Z-axis direction). The first direction and the second direction are perpendicular to each other. 
     The shake correction unit is used to correct image blurring or video shaking caused by user hand-shake, or the like, when an image or a video is captured. For example, when the shake occurs due to user hand-shake, or the like, at the time of capturing an image, a relative displacement corresponding to the shake is provided to the lens barrel  1510  to correct the shaking. As an example, the shake correction unit corrects the shaking by moving the lens barrel  1510  in a direction perpendicular to an optical axis (a Z axis). 
     The shake correction unit includes a frame  1400  and the lens module  1500  sequentially provided in the carrier  1300 . The lens module  1500  includes a lens holder  1700  to which the lens barrel  1510  is coupled. The carrier  1300  may include the upper cover  1301  covering the frame  1400  and the lens module  1500  from above while they are disposed inside of the carrier  1300 . 
     The shake correction unit according to this example may implement a structure in which the lens barrel  1510  may be moved as the frame  1400  and the lens holder  1700  are moved in the second direction (the Y-axis direction) and the first direction (the X-axis direction), respectively. 
     For example, the lens holder  1700 , to which the lens barrel  1510  is fixed, is moved as the frame  1400  is moved in the second direction (the Y-axis direction) or the lens holder  1700  is moved in the first direction (the X-axis direction). For example, since the lens barrel  1510  is fixed to the lens holder  1700 , the lens barrel  1510  is moved together with the movement of the lens holder  1700  and the lens barrel  1510  is a member moved while the lens holder  1700  is supported on the frame  1400 . Therefore, the lens barrel  1510  is naturally moved together with the frame  1400  even when the frame  1400  is moved. 
     Due the above structure, when the frame  1400  is moved in the second direction (the Y-axis direction) or the lens holder  1700  is moved in the first direction (the X-axis direction), the lens barrel  1510  is moved together to correct shaking. 
     A driving portion of the shake correction unit includes a first driving portion, driving the frame  1400 , and a second driving portion driving the lens holder  1700 . The frame  1400  is driven while being in closely supported on a surface disposed to be parallel to the optical axis direction of the carrier  1300 , and the lens holder  1700  is driven while being closely supported on a surface perpendicular to the optical axis direction. For example, in a relationship to a relative member, only the frame  1400  is closely supported in a direction perpendicular to the optical axis direction, and the lens holder  1700  may not be closely supported in the direction perpendicular to the optical axis direction, but may be closely supported on a surface disposed to be parallel to the optical axis direction. 
     The frame  1400  includes a first magnet  1420 . The first magnet  1420  is disposed to oppose a first coil  1430 , provided in the housing  1100 , in a first direction (an X-axis direction) perpendicular to the optical axis direction. 
     In addition, the first magnet  1420  is magnetized to have at least N and S poles in a second direction (a Y-axis direction) perpendicular to a direction opposing the first coil  1430  (for example, the first magnet  1420  is magnetized such that a surface opposing the first coil  1430  has at least N and S poles in a direction perpendicular to the optical axis). Accordingly, when power is applied to the first coil  1430 , force is generated to move the frame  1400  in the second direction (the Y-axis direction) depending on electromagnetic interaction of the first magnet  1420  and the first coil  1430 . 
     The lens holder  1700  is provided with a second magnet  1720 . The second magnet  1720  is disposed to oppose a second coil  1730 , provided in the housing  1100 , in the first direction (the X-axis direction) perpendicular to the optical axis direction. For example, the first magnet  1420  and a second magnet  1720  are disposed to be substantially parallel to each other. Accordingly, the first magnet  1420  and the second magnet  1720  may be disposed to oppose each other about the optical axis. 
     The second magnet  1720  may be magnetized such that a surface, opposing the second coil  1730 , has a single pole of an N or S pole or a plurality of poles including the N and S poles. When power is applied to the second coil  1730 , force is generated to move the lens holder  1700  in the first direction (the X-axis direction) by force to push or pull the second magnet  1720  and the second coil  1730  in direction opposing each other according to electromagnetic interaction of the second magnet  1720  and the second coil  1730 . 
     The first coil  1430  and the second coil  1730  are fixed to the substrate  1130  together with the driving coil  1330  of the focusing unit, and the substrate  1130  is fixed to the housing  1100 . 
     The frame  1400  is closely supported on a sidewall of the carrier  1300 , for example, a surface disposed to be parallel to the optical axis direction, and the lens holder  1700  is closely supported on a surface of the frame  1400  in the optical axis direction, for example, a surface perpendicular to the optical axis direction. 
     The frame  1400  is supported on the sidewall of the carrier  1300  by attractive force with a first yoke  1450  provided in the housing  1100 . Since the first yoke  1450  may be a metallic or non-metallic magnetic material to shield a magnetic field, magnetic flux generated by a coil, a magnet, or an interaction thereof may be prevented from leaking outwardly of the camera module  1000 . 
     The lens holder  1700  is supported on an upper surface (bottom) of the frame  1400  in the optical axis direction by attraction force with a second yoke  1750  provided in the frame  1400 . 
     The first yoke  1450  is disposed to oppose the first magnet  1420  in the direction perpendicular to the optical axis direction, with the first coil  1410  interposed therebetween, and the second yoke  1750  is disposed to oppose the second magnet  1710  in the optical axis direction. 
     The first yoke  1450  may be disposed on a rear surface of the first coil  1430 , and may allow the frame  1400  to be closely supported on an internal wall of the carrier  1300  in the direction perpendicular to the optical axis direction, by the attractive force with the first magnet  1420 . 
     The second yoke  1750  may allow the lens holder  1700  to be closely supported on an upper surface (a bottom surface) of the frame  1400  in the optical axis direction by the attractive with the second magnet  1720 . Since the second yoke  1750  and the second magnet  1720  are provided on only a portion based on the circumference of the frame  1400 , the lens holder  1700  may be eccentrically supported on the frame  1400 . Thus, a third yoke  1650  and a third magnet  1620  may be selectively provided on the lens holder  1700  and the frame  1400 , respectively, to oppose each other in the optical axis direction. 
     The frame  1400  may include a first rolling member  1470  between and internal wall surface of the carrier  1300  (a surface disposed to be parallel to the optical axis direction) and the frame  1400  to be easily moved on the internal wall of the carrier  1300  in a sliding or rolling motion. The lens holder  1700  may include a second rolling member  1770  between a surface perpendicular to the frame  1400  in the optical axis direction and the lens holder  1700  to be easily moved in a sliding or rolling motion on an upper surface of the frame  1400 . 
     A surface, on which the frame  1400  and the internal wall of the carrier  1300  oppose each other, may be provided with a first guide groove  1475  formed to be elongated in the second direction (the Y-axis direction) such that the first rolling member  2470  is easily moved in a sliding or rolling motion on at least one of the surfaces. A surface, on which the lens holder  1700  and the frame  1400  oppose each other, may be provided with a second guide groove  1775  formed to be elongated in the first direction (the X-axis direction) such that the second rolling member  1770  is easily moved in a sliding or rolling motion on at least one of the surfaces. 
     The first rolling member  1470  may be provided with one or two first magnets  1420  on external sides of both end portions thereof, respectively, to form a triangle or a quadrangle. Each first rolling member  1470  may be provided with at least one rolling member in each first guide groove  1475 . 
     The second rolling member  1770  is provided with a total of three or four rolling members, including two rolling members respectively disposed on both sides of the second magnet  1720 , to form a triangle or a quadrangle. Each second rolling member  1770  may be provided with at least one rolling member in each second guide groove  1775 . When three second rolling members  1770  are provided to form a triangle, they may be arranged to form an approximately right triangle. The second magnet  1720  may be provided between two second rolling members  1770 , among the three second rolling members  1770 , to balance suction force in the optical axis direction, and the third magnet  1620  or the third yoke  1650  may be provided to be closest to the remaining one second rolling member  1770 . 
     The first and second magnets  1420  and  1720  of the shake correction driving unit including the first driving unit and the second driving unit are mounted on the first and second frames  1400  and  1700 , respectively. The first and second coils  1430  and  1730 , respectively opposing the first and second magnets  1420  and  1720 , are mounted in the housing  1100 . For ease of description, in a portion of the drawings, the first and second coils  1430  and  1730  are illustrated as being disposed on a side of the carrier  1300 . However, referring to  FIG. 2 , both of the first and second coils  1430  and  1730  may be mounted in the housing  1100 . 
     The first and second magnets  1420  and  1720  are movable members, moving together with the lens module  1500  in a direction perpendicular to the optical axis (the Z-axis), and the first and second coils  1430  and  1730  are fixed members fixed to the housing  1100 . However, the configuration is not limited thereto, and positions of the first and second magnets  1420  and  1720  and the first and second coils  1430  and  1730  are interchangeable with each other. 
     The shake correction driving unit may use a closed loop control method in which the positions of the frame  1400  and the lens holder  1700  are continuously sensed and reflected on driving. Accordingly, the frame  1400  and the lens holder  1700  may include first and second position sensors  1460  and  1760 , opposing the first and second magnets  1420  and  1470 , to sense the positions of the frame  1400  and the lens holder  1700 . In this case, the first and second position sensors  1460  and  1760  may be provided inside or by the first and second coils  1430  and  1730  of the substrate  1130 . 
     This example includes all structures in which one or two or more first and second coils  1430  and  1730 , opposing the first and second magnets  1420  and  1470  provided on the frame  1400  and the lens holder  1700 , are provided, respectively. When two or more first and second coils  1430  and  1730  are provided, the amount of magnetic flux may be adjusted to more efficiently prevent leakage of the magnetic flux. 
     In the camera module  1000  according to this example, side surfaces of the housing  1100  using a VCM actuator using a magnet and a coil may all be finished with a yoke, capable of preventing leakage of magnetic flux. As a result, leakage of a magnetic field may be effectively prevented. 
     The camera module  1000  according to this example has a structure in which the housing  1100 , the carrier  1300 , the frame  1400  and the lens module  1500  are sequentially provided in the optical axis direction, the carrier  1300  is moved in the optical axis direction to implement an autofocusing (AF) function, and the frame  1400  and the lens module  1500  are moved in the first direction and the second direction, perpendicular to the optical axis, from an upper portion of the carrier  1300  to implement optical image stabilization (OIS). 
     To implement the optical image stabilization (OIS), the frame  1400  is moved in a second direction, perpendicular to the optical axis (the Y-axis direction), while being supported on the sidewall of the carrier  1300  parallel to the optical axis direction, and the lens module  1500  (in further detail, the lens barrel  1510  or the lens holder  1700 ) is moved in the first direction (the X-axis direction), perpendicular to the optical axis direction, while being supported on a bottom surface perpendicular to the optical axis direction of the frame  1400 . 
     However, the configuration is not limited thereto. To implement optical image stabilization (OIS) according to another example, directions or surfaces of the frame  1400  and the lens module  1500  are interchangeable with each other. 
     For example, to implement optical image stabilization (OIS) according to another example, the frame  1400  may be moved in the second direction (the Y-axis direction), perpendicular to the optical axis, while being supported on a bottom surface, a surface perpendicular to the optical axis direction of the carrier  1300 , and the lens module  1500  (in further detail, the lens barrel  1510  or the lens holder  1700 ) may be moved in the first direction (the X-axis direction), perpendicular to the optical axis, while being supported on the sidewall of the frame  1400  parallel to the optical axis direction. 
     In this case, the first magnet  1420  provided in the frame  1400  may be magnetized to an N-pole or an S-pole of a single-pole magnet, or a plurality of poles including the N-pole and the S-pole, and may allow attractive force or repulsive force to be generated between the first coil  1430 , provided in the housing  1100 , and the first magnet  1420  in directions opposing each other. Thus, force may be generated to move the frame  1400  in the first direction (the X-axis direction), the second magnet  1720  provided in the lens module  1500  may use a magnet magnetized to multiple poles including N-pole and S-pole in the direction, perpendicular to the optical axis direction, and the lens module  1500  may be moved along a surface, opposing the second coil  1730  provided in the housing  1100 , in the second direction (the Y-axis direction) perpendicular to the optical axis direction. 
     In this case, the housing  1100  may be provided with a yoke covering the second coil  1730 , and the second magnet  1720  provided in the lens module  1500  may be closely supported on a sidewall of the frame  1400 , for example, a surface disposed to be parallel to the optical axis direction, by attractive force with the yoke. However, since the frame  1400  should be movable in a direction parallel to the direction in which the frame  1400  is closely supported, force significantly greater than attractive force between the lens module  1500  and the frame  1400  may be required by interaction between the first magnet  1420  and the first coil  1430 . Alternatively, a yoke may be provided on the frame  1400 , a movable member, rather than the housing  1100 , to prevent attractive force between the yoke and the second magnet  1720  from affecting movement of the frame  1400 . 
     In addition, the frame  1400  may be provided with a rolling member interposed between the carrier  1300  and a surface perpendicular to the optical axis direction, and the lens module  1500  may be provided with a rolling member interposed between the frame  1400  and the surface perpendicular to the optical axis direction. 
     Detailed descriptions of other examples are omitted, but an overall structure of a camera module may be modified with reference to a structural concept of the camera module  1000 . 
     As described above, leakage of a magnetic field may be significantly reduced while employing an actuator using a magnet and a coil. Thus, miniaturization and accuracy in driving of a camera module may be implemented. 
     In addition, even when camera modules are arranged to be adjacent to each other, magnetic field interference may be significantly reduced. Thus, the camera modules may be freely arranged. 
     While this disclosure includes specific examples, it will be apparent after an understanding of the disclosure of this application that various changes in forms and details may be made in these examples 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 are to be considered as being applicable to similar features or aspects in other examples. Suitable results may be achieved if the described techniques are performed in a different order, and/or if components in a described system, architecture, device, or circuit are combined in a different manner, and/or replaced or supplemented by other components or their equivalents. Therefore, the scope of the disclosure is defined not by the detailed description, but 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.