Patent Publication Number: US-2022229347-A1

Title: Camera module and camera apparatus including same

Description:
TECHNICAL FIELD 
     An embodiment relates to a camera module and a camera device including the same. 
     BACKGROUND ART 
     A camera module performs a function of photographing a subject and storing it as an image or a moving image, and is mounted on a mobile terminal such as a mobile phone, a laptop a drone, a vehicle, and the like. 
     Meanwhile, an ultra-small camera module is built into a portable device such as a smartphone, a tablet PC, and a notebook, and such a camera module may perform an autofocus (AF) function adjusting automatically a distance between an image sensor and a lens to adjust a focal length of the lens. 
     In addition, recently, a camera module may perform a zooming function of zooming up or zooming out photographing a subject by increasing or decreasing a magnification of a long-distance subject through a zoom lens. 
     Further, recently, a camera module adopts an image stabilization (IS) technology to correct or prevent image shake caused by camera movement due to an unstable fixing device or user movement. 
     Such an image stabilization (IS) technology includes an optical image stabilizer (OIS) technology and an image stabilization technology using an image sensor. 
     The OIS technology is a technology that corrects movement by changing a light path, and the image stabilization technology using the image sensor is a technology that corrects movement by mechanical and electronic methods, but the OIS technology is often used. 
     In addition, a camera module for a vehicle is a product for transmitting images around a vehicle or inside a vehicle to a display, and may be mainly used for a parking assistance system and a traveling assistance system. 
     In addition, the camera module for the vehicle detects a lane, a vehicle, and the like around the vehicle, collects, and transmits related data, and thus it is possible to warn from an ECU or control the vehicle. 
     Meanwhile, a zoom actuator is used for a zooming function of a camera module, but frictional torque is generated when a lens is moved by mechanical movement of the actuator, and there are technical problems such as a decrease in driving force, an increase in power consumption, or a deterioration in control characteristics due to the friction torque. 
     Specifically, in order to achieve the best optical characteristics by using a plurality of zoom lens groups in a camera module, an alignment between the plurality of lens groups and an alignment between the plurality of lens groups and an image sensor should be well matched, but when a decentering in which a spherical center between the lens groups deviates from an optical axis, a tilt which is a phenomenon of lens tilt, or a phenomenon in which central axes of the lens groups and the image sensor are not aligned occurs, an angle of view changes or defocus occurs, which adversely affects image quality or resolution. 
     Meanwhile, when increasing a separation distance in a region in which friction occurs in order to reduce a friction torque resistance while moving a lens for a zooming function in a camera module, there is a contradiction in technical problems in which a lens decentering or a lens tilt are deepened when zoom movement or reversal of the zoom movement is performed. 
     Meanwhile, in an image sensor, as a pixel is higher, a resolution increases and a size of the pixel becomes smaller, and when the size of the pixel becomes smaller, an amount of light received at the same time will be reduced. Therefore, in a darker environment, in a high-pixel camera, image shake due to camera shake that occurs while a shutter speed is slower occurs more seriously. 
     Accordingly, recently, an OIS function has been indispensable for photographing an image without deformation using a high-pixel camera in dark nights or moving images. 
     Meanwhile, OIS technology is a method to correct image quality by changing an optical path by moving a lens or an image sensor of a camera. In particular, in the OIS technology, movement of the camera is sensed through a gyro sensor, and a distance that the lens or the image sensor should move based on the movement is calculated. 
     For example, an OIS correction method includes a lens moving method and a module tilting method. In the lens moving method, only a lens in a camera module is moved in order to realign the center of an image sensor and an optical axis. On the other hand, the module tilting method is a method of moving the entire module including the lens and the image sensor. 
     Specifically, the module tilting method has an advantage that a correction range is wider than that of the lens moving method and a focal length between the lens and the image sensor is fixed, and thus image deformation may be minimized. 
     Meanwhile, in case of the lens moving method, a hall sensor is used to sense a position and movement of the lens. On the other hand, in the module tilting method, a photo reflector is used to sense movement of the module. However, both methods use a gyro sensor to sense movement of a user of the camera. 
     An OIS controller uses data recognized by the gyro sensor to predict a position in which the lens or the module should move in order to compensate for movement of a user. 
     Recently, an ultra-thin and ultra-small camera module is required in accordance with technological trends, but since the ultra-small camera module has a space limitation for OIS drive, there is a problem that it is difficult to implement the OIS function applied to a general large camera, and there is a problem that the ultra-thin and ultra-small camera module cannot be implemented when the OIS drive is applied. 
     In addition, in the conventional OIS technology, an OIS driver is disposed at a side surface of a solid-state lens assembly within a limited camera module size, and thus there is a problem that it is difficult to secure a sufficient amount of light because a size of a lens to be subjected to OIS is limited. 
     Specifically, in order to achieve the best optical characteristics in a camera module, an alignment between the lens groups at the time of OIS implementation should be well matched through movement of a lens or tilting of a module, but in the conventional OIS technology, when a decenter in which a spherical center between the lens groups deviates from an optical axis or a tilt which is a phenomenon of lens tilt occurs, there is a problem that adversely affects image quality or resolution. 
     In addition, the conventional OIS technology may implement AF or Zoom at the same time as OIS driving, but an OIS magnet and an AF or Zoom magnet are disposed close to each other due to space limitation of a camera module and a position of a driving part of the conventional OIS technology, and cause a magnetic field interference, and thus there is a problem that the OIS driving is not performed normally, and a decent or a tilt phenomenon is induced. 
     Further, in the conventional OIS technology, since a mechanical driving device is required for moving the lens or tilting the module, there is a problem that a structure is complicated and power consumption is increased. 
     Meanwhile, as described above, a camera module is applied to vehicles together with a radar, and may be used for an advanced driver assistance system (ADAS), which may greatly affect the safety and life of drivers and pedestrians as well as convenience for the driver. 
     For example, an advanced driver assistance system (ADAS) include an autonomous emergency braking system (AEB) that reduces speed or stops by itself even if a driver does not step on a brake in an event of a collision, a lane keep assist system (LKAS) that maintains a lane by controlling a traveling direction when leaving the lane, an advanced smart cruise control (ASCC) that maintains a distance from a vehicle ahead while running at a predetermined speed, an active blind spot detection system (ABSD) that detects the danger of blind spot collision and helps to change to a safe lane, and an around view monitor system (AVM) that visually displays a situation around a vehicle. 
     In such an advanced driver assistance system (ADAS), a camera module functions as a core component together with a radar and the like, and a portion in which the camera module is applied is gradually increasing. 
     For example, in case of an autonomous emergency braking system (AEB), a vehicle or a pedestrian in front of a vehicle is detected by a camera sensor and a radar sensor in front of the vehicle, so that emergency braking may be automatically performed when a driver does not control the vehicle. 
     Alternatively, in case of a lane keep assist system (LKAS), it detects through a camera sensor whether a driver leaves a lane without operating a turn signal, and automatically steers a steering wheel, so that it may control to maintain the lane. 
     In case of an around view monitor system (AVM), it may display visually a situation around a vehicle through a camera sensor disposed on four sides of the vehicle. 
     When a camera module is applied to an advanced driver assistance system (ADAS) of a vehicle, OIS technology is more important due to vibration of the vehicle, and a precision of OIS data may be directly related to the safety or life of a driver or pedestrian. In addition, when implementing AF or Zoom, a plurality of lens assemblies are driven by an electromagnetic force between a magnet and a coil, and there is a problem that a magnetic field interference occurs between magnets mounted in each lens assembly. There is a problem that AF or Zoom driving is not performed normally, and thrust is deteriorated due to such a magnetic field interference between magnets. 
     In addition, there is a problem that a decenter or tilt phenomenon due to a magnetic field interference between magnets is induced. 
     When an issue in a precision in camera control occurs or thrust is deteriorated due to such a magnetic field interference, or a decent or tilt phenomenon is induced, it may be directly related to the safety or life of a driver who is a user, or a pedestrian. 
     In addition, when detachment of each component of a camera module, for example, a magnet or the like, occurs in an environment in which vibration is severe such as a vehicle, it may cause not only mechanical reliability but also large problems such as thrust, precision, and control. 
     Meanwhile, contents described in items merely provide background information of the present disclosure and do not constitute the related art. 
     DISCLOSURE OF INVENTION 
     Technical Problem 
     One of technical problems of embodiments is to provide a camera actuator capable of preventing generation of friction torque when moving a lens by zooming in a camera module, and a camera module including the same. 
     In addition, one of the technical problems of the embodiments is to provide a camera actuator capable of preventing a lens decentering, a lens tilt, or occurrence of a phenomenon that a center axis of an image sensor does not coincide with a center of a lens during a lens shift through zooming in a camera module, and the camera module including the same. 
     In addition, one of the technical problems of the embodiments is to provide an ultrathin and ultra-small camera actuator and a camera module including the same. 
     In addition, one of the technical problems of the embodiments is to provide a camera actuator that may secure a sufficient amount of light by eliminating lens size limitation of an optical system lens assembly when OIS is implemented, and a camera module including the same. 
     In addition, one of the technical problems of the embodiments is to provide a camera actuator capable of achieving the best optical characteristics and a camera module including the same by minimizing occurrence of a decenter or tilt phenomenon when the OIS is implemented. 
     In addition, one of the technical problems of the embodiments is to provide a camera actuator capable of preventing a magnetic field interference with an AF or Zoom magnet when the OIS is implemented, and a camera module including the same. 
     In addition, one of the technical problems of the embodiments is, when implementing AF or Zoom, to provide a camera actuator capable of preventing a magnetic field interference between magnets mounted on each lens assembly when a plurality of lens assemblies are driven by an electromagnetic force between a magnet and a coil, and a camera module including the same. 
     In addition, the embodiment is to provide a camera actuator capable of preventing detachment of a magnet and a yoke, and a camera module including the same. 
     In addition, one of the technical problems of the embodiments is to provide a camera actuator capable of implementing the OIS with low power consumption, and a camera module including the same. 
     The technical problems of the embodiments are not limited to those described in this item, but include those that may be understood from the entire description of the invention. 
     Solution to Problem 
     A camera module according to an embodiment may include a base  20 , a first lens assembly  110  and a second lens assembly  120  disposed on the base  20 , wherein the first lens assembly  110  may include a first driving part  116  and a third driving part  141 . The second lens assembly  120  may include a second driving part  126  and a fourth driving part  142 . 
     In the first lens assembly  110 , the first driving part  116  may include a first magnet  116   b  and a first yoke  116   a . The third driving part  141  may include a first coil part  141   b  and a third yoke  141   a.    
     In the second lens assembly  120 , the second driving part  126  may include a second magnet  126   b  and a second yoke  126   a , and the fourth driving part  142  may include a second coil part  142   b  and a fourth yoke  142   a . The first yoke  116   a  may include a first support portion  116   a   1  and a first side protruding portion  116   a   2  extending from the first support portion  116   a   1  toward a first side surface of the first magnet  116   b.    
     The first yoke  116   a  may include a first fixed protruding portion  116   a   3  extending in a direction opposite to the first side protruding portion  116   a   2 . 
     A thickness of the first side protruding portion  116   a   2  may be thicker than that of the first support portion  116   a   1 . Accordingly, since a second thickness T 2  of the first side protruding portion  116   a   2  which is a region having a high magnetic flux density is thicker than a first thickness T 1  of the first support portion  116   a   1 , a shielding performance of leakage flux is improved and divergence efficiency of magnetic flux density is increased, so that a shielding function of magnetic flux may be improved and a concentration function of magnetic flux may be enhanced. 
     The first yoke  116   a  may include a first extension protruding portion  116   a   22  extending more upward than an upper surface of the first magnet  116   b  from the first side protruding portion  116   a   2 . 
     The total thickness PL of the first side protruding portion  116   a   2  and the first extension protruding portion  116   a   22  may be greater than a thickness ML of the first magnet  116   b.    
     The first yoke  116   a  may include a second side protruding portion  116   a   4  protruding to a second side surface of the first magnet  116   b . In addition, a camera module according to an embodiment may include a base including a first side wall and a second side wall corresponding to the first side wall, a first guide part disposed adjacent to the first side wall of the base, a second guide part disposed adjacent to the second side wall of the base, a first lens assembly that moves along the first guide part, a second lens assembly that moves along the second guide part, a first ball disposed between the first guide part and the first lens assembly, and a second ball disposed between the second guide part and the second lens assembly. 
     The first lens assembly may include a first groove in which the first ball is disposed, and the second lens assembly may include a second groove in which the second ball is disposed. 
     The first guide part, the first ball, and the first groove may be disposed on a virtual straight line from the first side wall toward the second side wall. 
     In addition, a camera module according to an embodiment may include a base, a first guide part disposed on one side of the base, a second guide part disposed on the other side of the base, a first lens assembly corresponding to the first guide part, a second lens assembly corresponding to the second guide part, a first ball disposed between the first guide part and the first lens assembly; and a second ball disposed between the second guide part and the second lens assembly. 
     The first guide part may include a first-first rail of a first shape and a first-second rail of a second shape, the second guide part may include a second-first rail of the first shape and a second-second rail of the second shape. 
     The first shape of the first guide part and the second shape of the first guide part may be different shapes. 
     The first-first rail of the first shape and the second-first rail of the first shape may be positioned diagonally, and the first-second rail of the second shape and the second-second rail of the second shape may be positioned diagonally. 
     In addition, a camera module according to an embodiment may include a base, a first guide part disposed on one side of the base, a second guide part disposed on the other side of the base, a first lens assembly corresponding to the first guide part, a second lens assembly corresponding to the second guide part, a first ball disposed between the first guide part and the first lens assembly; and a second ball disposed between the second guide part and the second lens assembly. 
     The first guide part may include two first rails, and the second guide part may include two second rails. 
     The first lens assembly may include a first lens barrel and a first driving part, and the second lens assembly may include a first lens barrel and a second driving part. 
     The first driving part may correspond to the two first rails, and the second driving part may correspond to the two second rails. 
     The first guide part may be disposed between the first lens assembly and the first side wall of the base, and the second guide part may be disposed between the second lens assembly and the second side wall of the base. 
     The first guide part may include two first rails, and the second guide part may include two second rails. 
     The first ball may include two, one of the first balls may move along one of the two first rails, and the other one of the first balls may move along the other one of the two first rails. 
     The first shape of the first guide part and the second guide part may be an L-shape, and the second shape of the first guide part and the second guide part may be a V-shape. 
     The second guide part, the second ball, and the second groove may be disposed on a virtual straight line from the first side wall toward the second side wall. 
     The first lens assembly may include a first lens barrel on which a lens is disposed and a first driving part, the first groove of the first lens assembly may be in plural, and a distance between two first grooves of the plurality of first grooves with respect to an optical axis direction may be longer than a thickness of the first lens barrel. 
     A camera module according to an embodiment may further include a third lens assembly including a third housing, wherein the first guide part may include a first protrusion formed on a first surface of the first guide part and a second protrusion formed on a second surface thereof, the first protrusion of the first guide part may be coupled to a third side wall disposed between the first side wall and the second side wall of the base, and the second protrusion of the first guide part may be coupled to the third housing. 
     The first groove of the first lens assembly may be V-shaped, and the first rail of the first guide part may include an L-shaped first rail and a V-shaped first rail. 
     The second groove of the second lens assembly may be V-shaped, and the second rail of the second guide part may include an L-shaped second rail and a V-shaped second rail. 
     The V-shaped first rail and the V-shaped second rail may be disposed diagonally to each other, and the L-shaped first rail and the L-shaped second rail may be disposed diagonally to each other. 
     In addition, a camera module actuator or a camera module including the same according to an embodiment may include a lens unit  222   c , a shaper unit  222  disposed on the lens unit  222   c , a first driving part  72 M coupled to the shaper unit  222 , and a second driving part  72 C disposed to correspond to the first driving part  72 M. 
     A camera module according to an embodiment may further include a housing  210  in which the second driving part  72 C is disposed, wherein the housing  210  may include a housing body  212  in which the lens unit is disposed, a first housing side portion  214 P 1  disposed in a direction in which a first protruding region b 12  protrudes, and a second housing side portion  214 P 2  disposed in a direction in which a second protruding region b 34  protrudes. 
     The lens unit  222   c  may include a translucent support  222   c   2 , a tunable prism, a second translucent support (not shown), or a liquid lens. 
     The lens unit  222   c  may perform a lens function in addition to a prism function of changing a light path, but the embodiment is not limited thereto. 
     The first housing side portion  214 P 1  and the second housing side portion  214 P 2  may include a driving part hole  214 H in which the second driving part  72 C is disposed. 
     The housing may include first to fourth jig holes formed to be overlapped vertically with the first to fourth protrusions. 
     The housing may include an opening  212 H formed between the first to fourth jig holes. 
     In addition, a camera actuator according to an embodiment may include a housing  210 , an image shaking control unit  220  including a shaper unit  222  and a first driving part  72 M and disposed on the housing  210 , and a second driving part  72 C disposed on the housing  210 . 
     The shaper unit  222  may include a shaper body  222   a , a protruding portion  222   b  extending from the shaper body  222   a  to a side surface thereof and coupled to the first driving part  72 M, and a lens unit  222   c  disposed on the shaper body  222   a.    
     A camera actuator according to an embodiment may include a prism unit  230  provided on the image shaking control unit  220  and including a fixed prism  232 . 
     The lens unit  222   c  may include a translucent support  222   c   2 , a tunable prism  222   cp , or a liquid lens. 
     The first driving part  72 M may include a magnet coupled to the protruding portion  222 , and the second driving part  72 C may include a coil coupled to the shaper body  222   a.    
     A camera module according to an embodiment may include a lens assembly, an image sensor unit disposed on one side of the lens assembly, and any one of the camera actuators disposed on the other side of the lens assembly. 
     Advantageous Effects of Invention 
     According to a camera actuator and a camera module including the same according to an embodiment, there is a technical effect that may solve a problem of generation of friction torque during zooming. 
     For example, according to the embodiment, a lens assembly is driven in a state in which the first guide part and the second guide part, which are precisely numerically controlled in the base, are coupled to each other, so that friction resistance is reduced by reducing friction torque, and thus there are technical effects such as improvement of driving force, reduction of power consumption, and improvement of control characteristics during zooming. 
     Accordingly, according to the embodiment, there is a complex technical effect that image quality or resolution may be improved remarkably by preventing occurrence of a phenomenon that a decenter of a lens, tilt of the lens, and a central axis of a lens group and an image sensor are not aligned while minimizing the friction torque during zooming. 
     In addition, a camera actuator according to the embodiment and a camera module including the same solve a problem of lens decenter or tilt generation during zooming, and align a plurality of lens groups well to prevent a change in an angle of view or occurrence of defocusing, and thus there is a technical effect that image quality or resolution is significantly improved. 
     For example, according to the embodiment, the first guide part includes the first-first rail and the first-second rail, and the first-first rail and the first-second rail guide the first lens assembly, and thus there is a technical effect that accuracy of alignment may be improved. 
     In addition, according to the embodiment, a center of a protrusion of the first guide part and a center of a groove of the third housing do not coincide, are spaced apart from each other, and are eccentrically disposed in order to increase the accuracy of lens alignment between a plurality of lens groups, and thus there is a technical effect that decenter and lens tilt may be minimized during zooming by increasing the accuracy of alignment between the lens groups. 
     Further, according to the embodiment, a center of a protrusion of the base and centers of grooves of the first and second guide parts do not coincide with each other, are spaced apart from each other, and are eccentrically disposed in order to increase the accuracy of lens alignment between a plurality of lens groups, and thus there is a technical effect that decenter and lens tilt may be minimized during zooming by increasing the accuracy of alignment between the lens groups. 
     In addition, two rails for each lens assembly are provided, and thus there is a technical effect that even though any one of the rails is distorted, the accuracy may be secured by the other one. 
     Further, according to the embodiment, the two rails for each lens assembly are provided, and thus there is a technical effect that despite an issue of the frictional force of the ball described later at any one of the rails, the driving force may be secured as the cloud driving proceeds smoothly in the other one. 
     Furthermore, according to the embodiment, since the two rails for each lens assembly are provided, it is possible to secure widely a distance between balls described later, and accordingly, there is a technical effect that a driving force may be improved, interference of a magnetic field may be prevented, and tilt may be prevented when the lens assembly is stopped or moved. 
     In the related art, when guide rails are disposed on the base itself, a gradient is generated along an injection direction, and thus there is difficulty in dimensional control, and there was a technical problem that friction torque increases and driving force decreases when injection is not performed normally. 
     On the other hand, according to the embodiment, the first guide part and the second guide part which are formed separately from the base are applied separately without disposing the guide rails on the base itself, and thus there is a special technical effect that generation of a gradient along the injection direction may be prevented. 
     In addition, according to the embodiment, there is a technical effect that it is possible to provide an ultra-thin and ultra-small camera actuator and a camera module including the same. 
     For example, according to the embodiment, the image shaking control unit  220  is disposed so as to utilize a space below the prism unit  230  and overlap each other, and thus there is a technical effect that it is possible to provide an ultra-thin and ultra-small camera actuator and a camera module including the same. 
     In addition, according to the embodiment, there is a technical effect that it is possible to provide a camera actuator capable of securing a sufficient amount of light and a camera module including the same by eliminating lens size limitation of an optical system lens assembly when the OIS is implemented. 
     For example, according to the embodiment, lens size limitation of an optical system lens assembly is eliminated by disposing the image shaking control unit  220  under the prism unit  230  when the OIS is implemented, and thus there is a technical effect that it is possible to provide a camera actuator capable of securing a sufficient amount of light and a camera module including the same. 
     In addition, according to the embodiment, there is a technical effect that it is possible to provide a camera actuator capable of achieving the best optical characteristics and a camera module including the same by minimizing occurrence of a decenter or tilt phenomenon when the OIS is implemented. 
     For example, according to the embodiment, the image shaking control unit  220  stably disposed on the housing  210  is provided, and a shaper unit  322  described later and a first driving part  72 M are included, and thus there is a technical effect that it is possible to provide a camera actuator capable of achieving the best optical characteristics and a camera module including the same by minimizing occurrence of a decenter or tilt phenomenon when the OIS is implemented through a lens unit  322   c  including a tunable prism  322   cp.    
     In addition, according to the embodiment, there is a technical effect that it is possible to provide a camera actuator capable of preventing a magnetic field interference with an AF or Zoom magnet and a camera module including the same when the OIS is implemented. 
     For example, according to the embodiment, when the OIS is implemented, the first driving part  72 M, which is a magnet driving part, is disposed on the second camera actuator  200  separated from the first camera actuator or the first camera module  100 , and thus there is a technical effect that that it is possible to provide a camera actuator capable of preventing a magnetic field interference with an AF or Zoom magnet and a camera module including the same. 
     In addition, according to the embodiment, there is a technical effect that it is possible to provide a camera actuator capable of preventing a magnetic field interference between magnets mounted on each lens assembly when a plurality of lens assemblies are driven by an electromagnetic force between a magnet and a coil when AF or Zoom is implemented, and a camera module including the same. 
     For example, according to the embodiment, a yoke in a magnet driving part of a first lens assembly  110  or a second lens assembly  120  includes a side protruding portion extending to a side surface of the magnet, and thus there is a technical effect that it is possible to provide a camera actuator capable of preventing a magnetic field interference between magnets mounted on each lens assembly when a plurality of lens assemblies are driven by an electromagnetic force between a magnet and a coil when AF or Zoom is implemented, and a camera module including the same. 
     For example, according to the embodiment, a yoke in a magnet driving part of a first lens assembly  110  or a second lens assembly  120  includes a side protruding portion extending to a side surface of the magnet to prevent leakage flux generated in the magnet, and the side protruding portion is disposed in a region having a high magnetic flux density so that the magnetic flux is concentrated (FC), and thus there is a problem that thrust is significantly improved by increasing a density between a flux line and the coil to increase the Lorentz Force. 
     In addition, in the embodiment, there is a technical effect that may provide a camera actuator capable of preventing detachment of a magnet and a yoke, and a camera module including the same. 
     According to the embodiment, as the first yoke  116   a  includes the first side protruding portion  116   a   2  extending to the side surface of the first magnet  116   b , there is an effect capable of preventing magnetic field interference between magnets mounted in each lens assembly, and there is a complex technical effect that thrust is improved by concentration of magnetic flux and the mechanical reliability is improved by firmly fixing the first magnet  116   b.    
     In addition, according to the embodiment, there is a technical effect that it is possible to provide a camera actuator capable of implementing the OIS with low power consumption and a camera module including the same. 
     For example, according to the embodiment, unlike the conventional method of moving a plurality of solid lenses, the OIS is implemented by driving the shaper unit  222  through the lens unit  222   c  including the tunable prism, the first driving part  72 M which is a magnet driving part, and the second driving part  72 C which is a coil driving part, and thus there is a technical effect that it is possible to provide a camera actuator capable of implementing the OIS with low power consumption and a camera module including the same. 
     In addition, according to the embodiment, the prism unit  230  and the lens unit  222   c  including the tunable prism may be disposed very close to each other, and thus there is a special technical effect that even though the change in the optical path is made fine in the lens unit  222   c , the change in the optical path may be widely secured in the actual image sensor unit. 
     The technical effects of the embodiments are not limited to those described in this item, but include those that may be understood from the entire description of the invention. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a perspective view of a camera module according to an embodiment. 
         FIG. 2  is a perspective view in which a part of a configuration of the camera module according to the embodiment shown in  FIG. 1  is omitted. 
         FIG. 3  is an exploded perspective view in which a part of a configuration of the camera module according to the embodiment shown in  FIG. 1  is omitted. 
         FIG. 4  is a perspective view of a first guide part and a second guide part of the camera module according to the embodiment shown in  FIG. 3 . 
         FIG. 5  is an additional perspective view of the first guide part and the second guide part of the embodiment shown in  FIG. 4 . 
         FIG. 6A  is a perspective view of the first guide part of the embodiment shown in  FIG. 5 . 
         FIG. 6B  is a perspective view in a left direction of the first guide part of the embodiment shown in  FIG. 6A . 
         FIG. 7A  is a perspective view of a first lens assembly of the camera module according to the embodiment shown in  FIG. 3 . 
         FIG. 7B  is a perspective view in which a part of a configuration of the first lens assembly  110  shown in  FIG. 7A  is removed. 
         FIG. 8A  is a cross-sectional view taken along line B 1 -B 2  in the camera module according to the embodiment shown in  FIG. 2 . 
         FIG. 8B  is a driving example view of a camera module according to an embodiment. 
         FIG. 9  is a perspective view of a third lens assembly in the camera module according to the embodiment shown in  FIG. 3  in a first direction. 
         FIG. 10  is a perspective view of the third lens assembly  130  shown in  FIG. 9  in a second direction. 
         FIG. 11A  is a perspective view of a base of the camera module according to the embodiment shown in  FIG. 3 . 
         FIG. 11B  is a front view of the base shown in  FIG. 11A . 
         FIG. 12  is an enlarged view of a first region of the base shown in  FIG. 11B . 
         FIG. 13  is an illustrative view showing a combination of a third lens assembly and a first guide part in the camera module according to the embodiment shown in  FIG. 3 . 
         FIG. 14  is an enlarged view showing a coupling region of the third lens assembly shown in  FIG. 13 . 
         FIG. 15  is a cross-sectional example view showing a combination of the third lens assembly and the first guide part shown in  FIG. 13 . 
         FIG. 16A  is an illustrative view showing a combination of a base and a first guide part of the camera module according to the embodiment shown in  FIG. 3 . 
         FIG. 16B  is an enlarged view showing a coupling region of the first guide part shown in  FIG. 16A . 
         FIG. 16C  a cross-sectional example view showing a combination of the base and the first guide part shown in  FIG. 16A . 
         FIG. 17A  is a cross-sectional view taken along line C 1 -C 2  in the camera module according to the embodiment shown in  FIG. 1 . 
         FIG. 17B  is a driving example view of a camera module according to an embodiment. 
         FIG. 17C  is a perspective view of a first driving part  116  of the camera module according to the embodiment shown in  FIG. 17B . 
         FIG. 17D  shows data of a magnetic flux density distribution in Comparative Example. 
         FIG. 17E  shows data of a magnetic flux density distribution in Example. 
         FIG. 17F  is a detailed perspective view of a first yoke  116   a  in the first driving part  116  in Example. 
         FIG. 17G  is a bottom perspective view of the first yoke  116   a.    
         FIG. 18A  is a perspective view of a first driving part  116 B of a camera module according to a first additional embodiment. 
         FIG. 18B  is a perspective view of a first drive part  116 C of a camera module according to a second additional embodiment. 
         FIG. 19  is a perspective view showing a camera module of an embodiment including a second camera actuator. 
         FIG. 20A  is a perspective view of the second camera actuator in the camera module of the embodiment shown in  FIG. 19  in a first direction. 
         FIG. 20B  is a perspective view of the second camera actuator in the camera module of the embodiment shown in  FIG. 19  in a second direction. 
         FIG. 21A  is a perspective view of a first circuit board and a coil part of the second camera actuator of the embodiment shown in  FIG. 20B . 
         FIG. 21B  is a partially exploded perspective view of the second camera actuator of the embodiment shown in  FIG. 20B . 
         FIG. 21C  is a perspective view in which the first circuit board is removed from the second camera actuator of the embodiment shown in  FIG. 20B . 
         FIG. 22A  is an exploded perspective view of an image shaking control unit of the second camera actuator of the embodiment shown in  FIG. 21B . 
         FIG. 22B  is a combined perspective view of the image shaking control unit of the second camera actuator of the embodiment shown in  FIG. 22A . 
         FIG. 22C  is an exploded perspective view of a first driving part in the image shaking control unit shown in  FIG. 22A . 
         FIG. 23  is a perspective view of a shaper unit of the second camera actuator of the embodiment shown in  FIG. 22A . 
         FIG. 24  is a cross-sectional view of a lens unit taken along line A 1 -A 1 ′ of the shaper unit  322  shown in  FIG. 23 . 
         FIGS. 25A to 25B  are illustrative views showing an operation of the second camera actuator of an embodiment. 
         FIG. 26  is a first operation example view of the second camera actuator of the embodiment. 
         FIG. 27  is a second operation example view of the second camera actuator of the embodiment. 
         FIG. 28  is a perspective view of a camera module according to another embodiment. 
         FIG. 29  is a perspective view of a mobile terminal to which a camera module according to an embodiment is applied. 
         FIG. 30  is a perspective view of a vehicle to which a camera module according to an embodiment is applied. 
     
    
    
     MODE FOR THE INVENTION 
     Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. While the invention may be modified in various ways and take on various alternative forms, specific embodiments thereof are shown in the drawings and described in detail below as examples. There is no intent to limit the invention to the particular forms disclosed. On the contrary, the invention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the appended claims. 
     Although the terms “first,” “second,” etc. may be used to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. In addition, terms defined specially in consideration of a configuration and operation of the embodiment are only for describing the embodiment, and do not limit the scope of the embodiment. 
     In describing the embodiments, when elements are described with terms “above (up) or below (down)”, “front (head) or back (rear)”, the terms “above (up) or below (down)”, “front (head) or back (rear)” may include both meanings that two elements are in direct contact with each other, or one or more other components are disposed between the two elements to form. Further, when expressed as “on (over)” or “under (below)”, it may include not only the upper direction but also the lower direction based on one element. 
     In addition, relational terms such as “on/above” and “under/below” used below do not necessarily require or imply any physical or logical relationship or order between such entities or elements, and may be used to distinguish any entity or element from another entity or element. 
     Embodiment 
       FIG. 1  is a perspective view of a camera module  100  according to an embodiment,  FIG. 2  is a perspective view in which a part of the configuration of the camera module according to the embodiment shown in  FIG. 1  is omitted, and  FIG. 3  is an exploded perspective view in which a part of the configuration of the camera module according to the embodiment shown in  FIG. 1  is omitted. 
     Referring to  FIG. 1 , the camera module  100  according to the embodiment may include a base  20 , a circuit board  40  disposed outside the base  20 , a fourth driving part  142 , and a third lens assembly  130 . 
       FIG. 2  is a perspective view in which the base  20  and the circuit board  40  are omitted in  FIG. 1 , and referring to  FIG. 2 , a camera module  100  according to an embodiment includes a first guide part  210 , a second guide part  220 , a first lens assembly  110 , a second lens assembly  120 , a third driving part  141 , and a fourth driving part  142 . 
     The third driving part  141  and the fourth driving part  142  may include a coil or a magnet. 
     For example, when the third driving part  141  and the fourth driving part  142  include the coil, the third driving part  141  may include a first coil part  141   b  and a first yoke  141   a , and the fourth driving part  142  may include a second coil part  142   b  and a second yoke  142   a.    
     Or, conversely, the third driving part  141  and the fourth driving part  142  may include the magnet. 
     In an xyz-axis direction shown in  FIG. 3 , a z-axis may refer to an optic axis direction or a direction parallel thereto, an xz plane represents the ground, and an x-axis may refer to a direction perpendicular to the z-axis on the ground (xz plane), and a y-axis may refer to a direction perpendicular to the ground. 
     Referring to  FIG. 3 , a camera module  100  according to an embodiment may include a base  20 , a first guide part  210 , a second guide part  220 , a first lens assembly  110 , a second lens assembly  120 , and a third lens assembly  130 . 
     For example, the camera module  100  according to the embodiment may include the base  20 , the first guide part  210  disposed on one side of the base  20 , the second guide part  220  disposed on the other side of the base  20 , the first lens assembly  110  corresponding to the first guide part  210 , the second lens assembly  120  corresponding to the second guide part  220 , a first ball  117  (see  FIG. 7A ) disposed between the first lens assembly  110  and the first guide part  210 , and a second ball (not shown) disposed between the second guide part  220  and the second lens assembly  120 . 
     In addition, the embodiment may include the third lens assembly  130  disposed in front of the first lens assembly  110  in the optic axis direction. 
     Hereinafter, specific features of the camera device according to the embodiment will be described with reference to the drawings. 
     &lt;Guide Part&gt; 
     Referring to  FIG. 2  and  FIG. 3 , the embodiment may include a first guide part  210  disposed adjacent to the first side wall  21   a  (see  FIG. 11A ) of the base  20 , and a second guide part  220  disposed adjacent to the second side wall  21   b  (referring to  FIG. 11A ) of the base  20 . 
     The first guide part  210  may be disposed between the first lens assembly  110  and the first side wall  21   a  of the base  20 . 
     The second guide part  220  may be disposed between the second lens assembly  120  and the second side wall  21   b  of the base  20 . The first side wall  21   a  and the second side wall  21   b  of the base may be disposed to face each other. 
     According to the embodiment, a lens assembly is driven in a state in which the first guide part  210  and the second guide part  220 , which are precisely numerically controlled in the base, are coupled to each other, so that friction resistance is reduced by reducing friction torque, and thus there are technical effects such as improvement of driving force, reduction of power consumption, and improvement of control characteristics during zooming. 
     Accordingly, according to the embodiment, there is a complex technical effect that image quality or resolution may be improved remarkably by preventing occurrence of a phenomenon that a decenter of a lens, tilt of the lens, and a central axis of a lens group and an image sensor are not aligned while minimizing the friction torque during zooming, 
     In the related art, when guide rails are disposed on the base itself, a gradient is generated along an injection direction, and thus there is difficulty in dimensional control, and there was a technical problem that friction torque increases and driving force decreases when injection is not performed normally. 
     On the other hand, according to the embodiment, the first guide part  210  and the second guide part  220  which are formed separately from the base  20  are applied separately without disposing the guide rails on the base itself, and thus there is a special technical effect that generation of a gradient along the injection direction may be prevented. 
     The base  20  may be injected in a Z-axis direction. In the related art, when a rail is integrally formed with the base, there is a problem that a straight line of the rail is distorted due to a gradient generated while the rail is injected in the Z-axis direction. 
     According to the embodiment, since the first guide part  210  and the second guide part  220  are injected separately from the base  20 , it is possible to prevent generation of a gradient remarkably as compared with the related art, and thus there is a special technical effect that precise injection may be performed and generation of a gradient due to injection may be prevented. 
     In the embodiment, the first guide part  210  and the second guide part  220  may be injected on an X axis, and a length injected may be shorter than the base  20 . In this case, when rails  212  and  222  are disposed on the first guide part  210  and the second guide part  220 , generation of a gradient during injection may be minimized, and there is a technical effect that possibility that the straight line of the rail is distorted is low. 
       FIGS. 4 and 5  are enlarged perspective views of a first guide part  210  and a second guide part  220  of the camera module according to the embodiment. 
     Referring to  FIG. 4 , in an embodiment, the first guide part  210  may include a single or a plurality of first rails  212 . In addition, the second guide part  220  may include a single or a plurality of second rails  222 . 
     For example, the first rail  212  of the first guide part  210  may include a first-first rail  212   a  and a first-second rail  212   b . The first guide part  210  may include a first support portion  213  between the first-first rail  212   a  and the first-second rail  212   b.    
     According to the embodiment, two rails for each lens assembly are provided, and thus there is a technical effect that even though any one of the rails is distorted, the accuracy may be secured by the other one. 
     In addition, according to the embodiment, the two rails for each lens assembly are provided, and thus there is a technical effect that despite an issue of the frictional force of the ball described later at any one of the rails, the driving force may be secured as the cloud driving proceeds smoothly in the other one. 
     The first rail  212  may be connected from one surface of the first guide part  210  to the other surface thereof. 
     A camera actuator according to the embodiment and a camera module including the same solve a problem of lens decenter or tilt generation during zooming, and align a plurality of lens groups well to prevent a change in an angle of view or occurrence of defocusing, and thus there is a technical effect that image quality or resolution is significantly improved. 
     For example, according to the embodiment, the first guide part  210  includes the first-first rail  212   a  and the first-second rail  212   b , and the first-first rail  212   a  and the first-second rail  212   b  guide the first lens assembly  110 , and thus there is a technical effect that accuracy of alignment may be improved. 
     In addition, according to the embodiment, since the two rails for each lens assembly are provided, it is possible to secure widely a distance between balls described later, and accordingly, there is a technical effect that a driving force may be improved, interference of a magnetic field may be prevented, and tilt may be prevented when the lens assembly is stopped or moved. 
     In addition, the first guide part  210  may include a first guide protruding portion  215  that extends in a side surface direction perpendicular to a direction in which the first rail  212  extends. 
     A first protrusion  214   p  may be included on the first guide protruding portion  215 . For example, the first protrusion  214   p  may include a first-first protrusion  214   p   1  and a first-second protrusion  214   p   2 . 
     Referring to  FIG. 4 , in the embodiment, the second guide part  220  may include a single or a plurality of second rails  222 . 
     For example, the second rail  222  of the second guide part  220  may include a second-first rail  222   a  and a second-second rail  222   b . The second guide part  220  may include a second support portion  223  between the second-first rail  222   a  and the second-second rail  222   b.    
     The second rail  222  may be connected from one surface of the second guide part  210  to the other surface thereof. 
     In addition, the second guide part  220  may include a second guide protruding portion  225  that extends in a side surface direction perpendicular to a direction in which the second rail  222  extends. 
     A second protrusion  224   p  including a second-first protrusion  224   p   1  and a second-second protrusion  224   p   2  may be included on the second guide protruding portion  225 . 
     The first-first protrusion  214   p   1  and first-second protrusion  214   p   2  of the first guide part  210  and the second-first protrusion  224   p   1  and second-second protrusion  224   p   2  of the second guide part  220  may be coupled to a third housing  21  of a third lens assembly  130  described later. 
     According to the embodiment, the first guide part  210  includes the first-first rail  212   a  and the first-second rail  212   b , and the first-first rail  212   a  and the first-second rail  212   b  guide the first lens assembly  110 , and thus there is a technical effect that accuracy of alignment may be improved. 
     In addition, according to the embodiment, the second guide part  220  includes the second-first rail  222   a  and the second-second rail  222   b , and the second-first rail  222   a  and the second-second rail  222   b  guide the second lens assembly  120 , and thus there is a technical effect that alignment accuracy may be increased. 
     Further, two rails for each lens assembly are provided, and thus there is a technical effect that even though any one of the rails is distorted, the accuracy may be secured by the other one. 
     In addition, according to the embodiment, since the two rails for each lens assembly are provided, it is possible to secure widely a distance between balls described later, and accordingly, there is a technical effect that a driving force may be improved, interference of a magnetic field may be prevented, and tilt may be prevented when the lens assembly is stopped or moved. 
     Further, according to the embodiment, the two rails for each lens assembly are provided, and thus there is a technical effect that despite an issue of the frictional force of the ball described later at any one of the rails, the driving force may be secured as the cloud driving proceeds smoothly in the other one. 
     Furthermore, according to the embodiment, the first guide part  210  and the second guide part  220  which are formed separately from the base  20  are applied separately without disposing the guide rails on the base itself, and thus there is a special technical effect that generation of a gradient along the injection direction may be prevented. 
     In the related art, when guide rails are disposed on the base itself, a gradient is generated along an injection direction, and thus there is difficulty in dimensional control, and there was a technical problem that friction torque increases and driving force decreases when injection is not performed normally. 
     Next, referring to  FIG. 5 , the first rail  212  of the first guide part  210  may include a first-first rail  212   a  having a first shape R 1  and a first-second rail  212   b  having a second shape R 2 . 
     Further, the second rail  222  of the second guide part  220  may include a second-first rail  222   a  of the first shape R 1  and a second-second rail  222   b  of the second shape R 2 . 
     The first shape R 1  of the first guide part  210  and the second shape R 2  of the first guide part  210  may be different shapes. 
     For example, the first shape R 1  of the first guide part  210  and the second guide part  220  may be a V-shape. The second shape R 2  of the first guide part  210  and the second guide part  220  may be an L-shape, but the embodiment is not limited thereto. 
     The first-first rail  212   a  of the first shape R 1  and the second-first rail  222   a  of the first shape R 1  may be positioned diagonally. 
     The first-second rail  212   b  of the second shape R 2  and the second-second rail  222   b  of the second shape R 2  may be positioned diagonally. 
     Subsequently, referring to  FIG. 5 , the first guide part  210  may include a single or a plurality of first guide part holes  210   h  in which a protrusion of a base is coupled in a first guide protrusion  215 . For example, the first guide part hole  210   h  may include a first regular hole  210   ha  and a first long hole  210   hb  in the first guide protrusion  215 . In the embodiment, the first regular hole  210   ha  is firmly coupled to the first guide protrusion  215 , and the first long hole  210   hb  is formed larger than the first guide protrusion  215 , and thus there is a special technical effect that generation of a minute tolerance of the first guide protrusion  215  generated in a Y-axis direction may be covered and rotation in an X-axis direction may be prevented. A regular hole and a long hole described below may also perform the same function. 
     In the embodiment, a first-second distance D 12  of the plurality of first guide part holes  210   h  to which a protrusion of the base  20  is coupled may be different from a first-first distance D 11  between first protrusions  214   p  of the plurality of first guide parts  210 , and accordingly, a coupling axis is formed in various ways, and a stable coupling force may be secured, thereby improving mechanical reliability. 
     For example, the first-second distance D 12  of the plurality of first guide part holes  210   h  to which the protrusion of the base  20  is coupled may be formed wider than the first-first distance D 11  between the first protrusions  214   p  of the plurality of first guide parts  210  coupled to a housing, and accordingly, a stable coupling force may be secured and mechanical reliability may be improved, but a length of the distance is not limited thereto. 
     The first regular hole  210   ha  may be a circular hole, and in the first long hole  210   hb , a diameter in a first axis direction may be different from that in a second axis direction perpendicular the first axis direction. For example, in the first long hole  210   hb , a diameter in the y-axis direction perpendicular to the x-axis may be larger than that in the x-axis direction horizontal to the ground. 
     In addition, the second guide part  220  may include a single or a plurality of second guide part holes  220   h  in a second guide protrusion  225 . For example, the second guide part hole  220   h  may include a second regular hole  220   ha  and a second long hole  220   hb  in the second guide protrusion  225 . 
     In addition, in the embodiment, a second-second distance D 22  of the plurality of second guide part holes  220   h  to which a protrusion of the base  20  is coupled may be different from a second-first distance D 21  between second protrusions  224   p  of the plurality of second guide parts  220 , and accordingly, a coupling axis is formed in various ways, and a stable coupling force may be secured, thereby improving mechanical reliability. 
     For example, the second-second distance D 22  of the plurality of second guide part holes  220   h  to which the protrusion of the base  20  is coupled may be formed wider than the second-first distance D 21  between the second protrusions  224   p  of the plurality of second guide parts  220  coupled to the housing, and accordingly, a stable coupling force may be secured and mechanical reliability may be improved, but a length of the distance is not limited thereto. 
     The second regular hole  220   ha  may be a circular hole, and in the second long hole  220   hb , a diameter in a first axis direction may be different from that in the second axis direction perpendicular the first axis direction. For example, in the second long hole  220   hb , a diameter in the y-axis direction perpendicular to the x-axis may be larger than that in the x-axis direction horizontal to the ground. 
     The first regular hole  210   ha  and the second regular hole  220   ha  may be positioned diagonally. In addition, the first long hole  210   hb  and the second long hole  220   hb  may be positioned diagonally. However, the embodiment is not limited thereto, the first regular hole  210   ha  and the second regular hole  220   ha  may be positioned at an upper portion, and the first long hole  210   hb  may be disposed below the first regular hole  210   ha . In addition, the first long hole  210   hb  and the second long hole  220   hb  may be positioned at a parallel position, and the second long hole  220   hb  may be disposed below the second regular hole  220   ha . The first long hole  210   hb  may be disposed above the first regular hole  210   ha , and the second long hole  220   hb  may be disposed above the second regular hole  220   ha.    
     Next,  FIG. 6A  is a perspective view of the first guide part  210  of the embodiment shown in  FIG. 5 , and  FIG. 6B  is a perspective view in a left direction of the first guide part  210  of the embodiment shown in  FIG. 6A . 
     In the embodiment, a first-first recess  214   r   1  in a circular shape may be disposed around a first-first protrusion  214   p   1  of the first guide part  210 . Further, in the embodiment, a first-second recess  214   r   2  in a circular shape may be disposed around a first-second protrusion  214   p   2  of the first guide part  210 . 
     In addition, a second-first recess (not shown) in a circular shape may be disposed around a second-first protrusion  224   p   1  of the second guide part  220 . Further, a second-second recess (not shown) in a circular shape may be disposed around a second-second protrusion  224   p   2  of the second guide part  220 . 
     According to the embodiment, there is a technical effect that when the first-first protrusion  214   p   1  and the first-second protrusion  214   p   2  are formed, generation of burrs therearound may be prevented by the first-first recess  214   r   1  and the first-second recess  214   r   2  are disposed around the first-first protrusion  214   p   1  and the first-second protrusion  214   p   2  of the first guide part  210 , respectively. 
     Accordingly, there is a technical effect that the first-first protrusion  214   p   1  and the first-second protrusion  214   p   2  of the first guide part  210  may be firmly and tightly coupled to a third housing  21 . 
     Next, referring to  FIG. 6A , a single or a plurality of first ribs  217  may be disposed between a first support portion  213  and a first-second rail  212   b.    
     In the related art, as an amount of an injected material increases or as a thickness of the injected material increases, shrinkage occurs, which makes it difficult to control dimensions, but on the other hand, when the amount of the injected material is reduced, a contradiction occurs in which strength is weakened. 
     According to the embodiment, the first rib  217  is disposed between the first support portion  213  and the first-second rail  212   b , and thus there is a complex technology effect that accuracy of dimensional control may be improved by reducing the amount of injection material, and strength may be secured. 
     Next, referring to  FIG. 6B , a first rail  212  of the first guide part  210  may include a rail part recess  212   rb . In addition, the first support portion  213  of the first guide part  210  may include a support portion recess  213   r.    
     According to the embodiment, the rail part recess  212   rb  and the support portion recess  213   r  is provided in the first guide part  210 , and thus there is a complex technology effect that accuracy of dimensional control may be improved and strength may be secured by reducing the amount of injection material to prevent shrinkage. 
     In addition, referring to  FIG. 6B , the first guide part  210  may include a first-third protrusion  214   p   3  disposed in a region opposite to the first-first proon  214   p   4  disposed in a region opposite to the first-second protrusion  214   p   2 . 
     The first-third protrusion  214   p   3  and the first-fourth protrusion  214   p   4  may be coupled to a base hole of a third side wall  21   c  of a base  20  described later. 
     &lt;First and Second Lens Assemblies and Balls&gt; 
     Next,  FIG. 7A  is a perspective view of a first lens assembly  110  of the camera module according to the embodiment shown in  FIG. 3 , and  FIG. 7B  is a perspective view in which a part of a configuration of the first lens assembly  110  shown in  FIG. 7A  is removed. 
     Referring briefly to  FIG. 3 , the embodiment may include a first lens assembly  110  moving along the first guide part  210  and a second lens assembly  120  moving along the second guide part  220 . 
     Referring again to  FIG. 7A , the first lens assembly  110  may include a first lens barrel  112   a  on which a first lens  113  is disposed and a first driving part housing  112   b  on which a first driving part  116  is disposed. The first lens barrel  112   a  and the first driving part housing  112   b  may be a first housing, and the first housing may be in a barrel shape or a lens-barrel shape. The first driving part  116  may be a magnet driving part, but the embodiment is not limited thereto, and in some cases, a coil may be disposed therein. 
     In addition, the second lens assembly  120  may include a second lens barrel (not shown) on which a second lens (not shown) is disposed and a second driving part housing (not shown) on which a second driving part (not shown) is disposed. The second lens barrel (not shown) and the second driving part housing (not shown) may be a second housing, and the second housing may be in a barrel shape or a lens-barrel shape. The second driving part may be a magnet driving part, but the embodiment is not limited thereto, and in some cases, a coil may be disposed therein. 
     The first driving part  116  may correspond to the two first rails  212 , and the second driving part may correspond to the two second rails  222 . 
     In the embodiment, it is possible to drive using a single or a plurality of balls. For example, the embodiment may include a first ball  117  disposed between the first guide part  210  and the first lens assembly  110  and a second ball (not shown) disposed between the second guide part  220  and the second lens assembly  120 . 
     For example, in the embodiment, the first ball  117  may include a single or a plurality of first-first balls  117   a  disposed above the first driving part housing  112   b  and a single or a plurality of first-second balls  117   b  below the first driving part housing  112   b.    
     In the embodiment, the first-first ball  117   a  of the first ball  117  may move along a first-first rail  212   a  which is one of the first rails  212 , and the first-second ball  117   b  of the first balls  117  may move along a first-second rail  212   b  which is another one of the first rails  212 . 
     A camera actuator according to the embodiment and a camera module including the same solve a problem of lens decenter or tilt generation during zooming, and align a plurality of lens groups well to prevent a change in an angle of view or occurrence of defocusing, and thus there is a technical effect that image quality or resolution is significantly improved. 
     For example, according to the embodiment, the first guide part includes the first-first rail and the first-second rail, and the first-first rail and the first-second rail guide the first lens assembly  110 , and thus there is a technical effect that accuracy of alignment between the second lens assembly  120  and an optic axis may be improved when the first lens assembly  110  moves. 
     Referring also to  FIG. 7B , in an embodiment, the first lens assembly  110  may include a first assembly groove  112   b   1  on which the first ball  117  is disposed. The second lens assembly  120  may include a second assembly groove (not shown) on which the second ball is disposed. 
     The first assembly groove  112   b   1  of the first lens assembly  110  may be in plural. In this case, a distance between two first assembly grooves  112   b   1  of the plurality of first assembly grooves  112   b   1  with respect to an optic axis direction may be longer than a thickness of the first lens barrel  112   a.    
     In the embodiment, the first assembly groove  112   b   1  of the first lens assembly  110  may be in a V-shape. Further, the second assembly groove (not shown) of the second lens assembly  120  may be in a V-shape. The first assembly groove  112   b   1  of the first lens assembly  110  may be in a U-shape in addition to the V-shape, or a shape that contacts the first ball  117  at two or three points. In addition, the second assembly groove (not shown) of the second lens assembly  120  may be in a U-shape in addition to the V-shape, or a shape that contacts the first ball  117  at two or three points. 
     Referring to  FIG. 2  and  FIG. 7A , in the embodiment, the first guide part  210 , the first ball  117 , and the first assembly groove  112   b   1  may be disposed on a virtual straight line from the first side wall  21   a  toward the second side wall  21   b . The first guide part  210 , the first ball  117 , and the first assembly groove  112   b   1  may be disposed between the first side wall  21   a  and the second side wall  21   b.    
     Referring to  FIG. 8 , in the first lens assembly  110 , an assembly protrusion  112   b   2  may be disposed at a position opposite to the first assembly groove  112   b   1 . In the embodiment, strength according to disposition of the assembly groove  112   b   1  is maintained by the assembly protrusion  112   b   2 , and a recess region is provided at an upper end of the assembly protrusion  112   b   2  to reduce an amount of an injected material, thereby increasing accuracy of dimensional control by preventing shrinkage. 
     Next,  FIG. 8A  is a cross-sectional view taken along line B 1 -B 2  in the camera module according to the embodiment shown in  FIG. 2 . 
     According to the embodiment, the first guide part  210  and the second guide part  220  may be disposed and inserted into the base  20 , respectively, the first lens assembly  110  may be disposed to correspond to the first guide part  210 , and the second lens assembly  120  may be disposed to correspond to the second guide part  220 . 
     Meanwhile, according to the embodiment, there is a technical effect that it is possible to prevent the first lens assembly  110  and the second lens assembly  120  from being reversely inserted into the base  20 . 
     For example, referring to  FIG. 8A , a first upper portion and a first lower portion of the base  20  on which the first driving part housing  112   b  of the first lens assembly  110  is disposed may be spaced apart at a first distance A 20 . 
     In addition, a second upper portion and a second lower portion of the base  20  on which the first driving part housing  122   b  of the second lens assembly  120  is disposed may be spaced apart at a second distance A 20 . 
     In this case, a vertical width of the first driving part housing  112   b  may include a first width A 110 , and a vertical width of the second driving part housing  122   b  may include a second width B 120 . 
     In this case, unlike a distance and a width shown in  FIG. 8A , when a dimensional control is designed so that the second width B 120  which is the vertical width of the second driving part housing  122   b  is larger than the first distance A 20  between the first upper portion and the first lower portion of the base  20 , the second lens assembly  120  is not inserted into a base region in which the first lens assembly  110  is mounted, and thus there is a technical effect that reverse inserting is prevented. 
     In addition, unlike a distance and a width shown in  FIG. 8A , when a dimensional control is designed so that the first width A 110  which is the vertical width of the first driving part housing  112   b  is larger than the second distance B 20  between the second upper portion and the second lower portion of the base  20 , the first lens assembly  110  is not inserted into a base region in which the second lens assembly  120  is mounted, and thus there is a technical effect that reverse inserting is prevented. 
     Next,  FIG. 8B  is a driving example view of the camera module according to the embodiment. 
     An interaction in which an electromagnetic force DEM is generated between a first magnet  116  and a first coil part  141   b  in the camera module according to the embodiment will be described with reference to  FIG. 8B . 
     As shown in  FIG. 8B , a magnetization method of the first magnet  116  of the camera module according to the embodiment may be a vertical magnetization method. For example, in the embodiment, all of an N-pole  116 N and an S-pole  116 S of the first magnet  116  may be magnetized so as to face the first coil part  141   b . Accordingly, the N-pole  116 N and the S-pole  116 S of the first magnet  116  may be respectively disposed so as to correspond to a region in which current flows in a y-axis direction perpendicular to the ground at the first coil part  141   b.    
     Referring to  FIG. 8B , in the embodiment, a magnetic force DM is applied in a direction opposite to an x-axis at the N-pole  116 N of the first magnet  116 , and when a current DE flows in a y-axis direction in a region of the first coil part  141   b  corresponding to the N-pole  116 N, the electromagnetic force DEM acts in a z-axis direction based on the Fleming&#39;s left-hand rule. 
     In addition, in the embodiment, the magnetic force DM is applied in the x-axis direction at the S-pole  116 S of the first magnet  116 , and when the current DE flows in a direction opposite to the y-axis perpendicular to the ground at the first coil part  141   b  corresponding to the S pole  116 S, the electromagnetic force DEM acts in a z-axis direction based on the Fleming&#39;s left-hand rule. 
     At this time, since a third driving part  141  including the first coil part  141   b  is in a fixed state, the first lens assembly  110 , which is a mover on which the first magnet  116  is disposed, may be moved back and forth along a rail of the first guide part  210  in a direction parallel to the z-axis direction by the electromagnetic force DEM according to a current direction. The electromagnetic force DEM may be controlled in proportion to the current DE applied to the first coil part  141   b.    
     Likewise, an electromagnetic force DEM is generated between a second magnet (not shown) and the second coil part  142   b  of the camera module according to the embodiment, and thus the second lens assembly  120  may be moved along a rail of the second guide part  220  horizontally with respect to the optic axis. 
     &lt;Third Lens Assembly&gt; 
     Next,  FIG. 9  is a perspective view of a third lens assembly  130  in the camera module according to the embodiment shown in  FIG. 3  in a first direction, and  FIG. 10  is a perspective view of the third lens assembly  130  shown in  FIG. 9  in a second direction, and is a perspective view in which a third lens  133  is removed. 
     Referring to  FIG. 9 , in an embodiment, the third lens assembly  130  may include a third housing  21 , a third barrel  131 , and a third lens  133 . 
     In the embodiment, the third lens assembly  130  includes a barrel recess  21   r  at an upper end of the third barrel  131 , and thus there is a complex technology effect that a thickness of the third barrel  131  of the third lens assembly  130  may be adjusted to be constant, and accuracy of dimensional control may be improved by reducing an amount of injection material. 
     In addition, according to the embodiment, the third lens assembly  130  may include a housing rib  21   a  and a housing recess  21   b  in the third housing  21 . 
     In the embodiment, the third lens assembly  130  includes the housing recess  21   b  in the third housing  21 , and thus there is a complex technology effect that accuracy of dimensional control may be improved by reducing the amount of injection material, and strength may be secured by including the housing rib  21   a  in the third housing  21 . 
     Next, referring to  FIG. 10 , the third lens assembly  130  may include a single or a plurality of housing holes in a third housing  21 . For example, the housing hole may include a third regular hole  22   ha  and a third long hole  22   hb  around a third barrel  131  of the third housing  21 . 
     The housing hole may be coupled to a first protrusion  214   p  of a first guide part  210  and a second protrusion  224   p  of a second guide part  220 . 
     The third regular hole  22   ha  may be a circular hole, and in the third long hole  22   hb , a diameter in a first axis direction may be different from that in a second axis direction perpendicular the first axis direction. For example, in the third long hole  22   hb , a diameter in the y-axis direction perpendicular to the x-axis may be larger than that in the x-axis direction horizontal to the ground. 
     The housing hole of the third lens assembly may include two third regular hole  22   ha  and two third long hole  22   hb.    
     The third regular hole  22   ha  may be disposed below the third housing  21 , and the third long hole  22   hb  may be disposed above the third housing  21 , but the embodiment is not limited thereto. The third long hole  22   hb  may be positioned diagonally to each other, and the third regular hole  22   ha  may be positioned diagonally to each other. 
     In an embodiment, the third housing  21  of the third lens assembly  130  may include a single or a plurality of housing protrusions  21   p . In the embodiment, the housing protrusion  21   p  is provided inside the third housing  21 , and thus it is possible to prevent reverse insertion, and to prevent the third housing  21  from being coupled to the base  20  by turning left and right. 
     The number of the housing protrusions  21   p  may be plural, for example, four, but the embodiment is not limited thereto. Referring also to  FIG. 11B , the housing protrusion  21   p  may be coupled to a side recess  23   a  disposed on a base-side protruding portion  23   a.    
     &lt;Base&gt; 
     Next,  FIG. 11A  is a perspective view of the base  20  of the camera module according to the embodiment shown in  FIG. 3 ,  FIG. 11B  is a front view of the base  20  shown in  FIG. 11A , and  FIG. 12  is an enlarged view of a first region  21   c A of the base  20  shown in  FIG. 11B . 
     Referring to  FIG. 3 , the first guide part  210 , the second guide part  220 , the first lens assembly  110 , the second lens assembly  120 , etc. may be disposed in the base  20  according to the embodiment. The third lens assembly  130  may be disposed at one side surface of the base. 
     Referring again to  FIG. 11A , the base  20  may have a rectangular parallelepiped shape having a space therein. 
     For example, the base  20  may include a first side wall  21   a , a second side wall  21   b , a third side wall  21   c , and a fourth side wall  21   d , and the base  20  may include a plurality of side walls and a base upper surface  21   e , and a base lower surface  21   f.    
     For example, the base  20  may include the first side wall  21   a  and the second side wall  21   b  corresponding to the first side wall  21   a . For example, the second side wall  21   b  may be disposed in a direction facing the first side wall  21   a.    
     The first side wall  21   a  and the second side wall  21   b  may include a first opening  21   b O and a second opening (not shown), respectively. 
     In addition, the base  20  may further include the third side wall  21   c  disposed between the first side wall  21   a  and the second side wall  21   b  and connecting the first side wall  21   a  and the second side wall  21   b . The third side wall  21   c  may be disposed in a direction perpendicular to the first side wall  21   a  and the second side wall  21   b.    
     The first, second, and third side walls  21   a ,  21   b , and  21   c  may be formed in an injection shape integrally with each other, or may be in a form in which each of configurations is coupled. 
     Referring to  FIG. 11B , a base protrusion may be disposed on the fourth side wall  21   d  of the base  20 . 
     The base protrusion may include a first base protrusion  22   p   1 , a second base protrusion  22   p   2 , a third base protrusion  22   p   3 , and a fourth base protrusion  22   p   4  disposed on the fourth side wall  21   d.    
     The first to fourth base protrusions  22   p   1 ,  22   p   2 ,  22   p   3 , and  22   p   4  may be coupled to a first guide part hole  210   h  and a second guide part hole  220   h.    
     The fourth side wall  21   d  may be in an opened form, and may include a fourth opening  21   d   0 . 
     The first guide part  210 , the second guide part  220 , the first lens assembly  110 , and the second lens assembly  120  may be detachably coupled to the inside of the base  20  through the fourth opening  21   d   0 . 
     Next, referring to  FIGS. 11A and 11B , the base  20  may include a base protruding portion  23   b  protruding in a z-axis direction from the fourth side wall  21   d . In the embodiment, the base protruding portion  23   b  is provided on the fourth side wall  21   d , so that when the first guide part  210  and the second guide part  220  are assembled to the base  20 , epoxy or adhesive is applied for bonding between the base  20  and the third housing  21  of the third lens assembly, thereby improving a strong bonding force. 
     In addition, the embodiment may include a side protruding portion  23   a  extending in an x-axis direction of the fourth side wall  21   d  of the base  20 . The side protruding portion  23   a  of the base  20  may serve a guiding function when a main FPCB (sensor FPCB) is coupled to the base  20 . 
     Subsequently, referring to  FIG. 11A , the base  20  may include the base upper surface  21   e  and the base lower surface  21   f.    
     The base upper surface  21   e  may include a base upper groove  21   er.    
     In the embodiment, the base upper groove  21   er  is provided on the base upper surface  21   e , and thus a thickness of a cross section thickened for assembling the first and second guide parts  210  and  220  is constant, thereby preventing shrinkage during injection. 
     The base upper surface  21   e  may include a base upper rib  21   ea.    
     In the embodiment, the base upper rib  21   ea  is disposed on the base upper surface  21   e , and thus it is possible to serve as a guide at the time of placing a FPCB, and serve a function of adjusting a thickness of a placing portion and a non-placing portion of the FPCB. 
     In addition, in the embodiment, the base lower surface  21   f  may include a base step  21   s.    
     In the embodiment, the base step  21   s  is provided at the base lower surface  21   f , thereby improving robust reliability of the first and second driving parts mounted therein. 
     Next,  FIG. 12  is an enlarged view of the first region  21   c A of the third side wall  21   c  of the base shown in  FIG. 11B . 
     In an embodiment, the third side wall  21   c  of the base may include a base hole. 
     For example, the base hole may include a single or a plurality of regular holes and a single or a plurality of long holes on the third side wall  21   c.    
     For example, the third side wall  21   c  may include a fourth-first regular hole  21   ha   1 , a fourth-second regular hole  21   ha   2 , a fourth-first long hole  21   hb   1 , and a fourth-second long hole  21   hb   2 . 
     The base hole may be coupled to a first-third protrusion  214   p   3  and a first-fourth protrusion  214   p   3  of the first guide part  210  and a second-fourth protrusion (not shown) of the second guide part  220 . 
     The fourth-first regular hole  21   ha   1  and the fourth-second regular hole  21   ha   2  may be circular holes, and the fourth-first long hole  21   hb   1  and the fourth-second long hole  21   hb   2  may have different diameters in a first axis direction and a second axis direction perpendicular thereto. The fourth-first regular hole  21   ha   1  and the fourth-second regular hole  21   ha   2  may be disposed diagonally. In this case, the fourth-first long hole  21   hb   1  and the fourth-second long hole  21   hb   2  may be disposed diagonally. However, the embodiment is not limited thereto, the fourth-first regular hole  21   ha   1  and the fourth-second regular hole  21   ha   2  may be disposed above the first region  21   c A, and the fourth-first long hole  21   hb   1  and the fourth-second long hole  21   hb   2  may be disposed below the first region  21   c A. 
     &lt;Eccentric Features&gt; 
     Next,  FIG. 13  is an illustrative view showing a combination of the third lens assembly  130  and the first guide part  210  in the camera module according to the embodiment shown in  FIG. 3 ,  FIG. 14  is an enlarged view showing a correspondence between a plane and a cross section of a third regular hole  22   hb , which is a coupling region of the third lens assembly  130  shown in  FIG. 13 , and  FIG. 15  a cross-sectional example view showing a combination of the third lens assembly  130  and the first guide part  210  shown in  FIG. 13 . 
     Specifically, in  FIG. 13 , a region in which the first-second protrusion  214   p   2  of the first guide part  210  and the third regular hole  22   ha  of the third housing are coupled is indicated by a first region  214 PH, and  FIG. 15  is a cross-sectional view of a state in which they are coupled. 
       FIG. 14B  is a cross-sectional view taken along line A 1 -A 2  in  FIG. 14A . 
     Referring to  FIG. 14 , the third regular hole  22   ha  of the third housing  21  may include a third groove  22   hr  and a third hole  22   ht  disposed in the third groove  22   hr.    
     In the embodiment, a center  22   hrc  of the third groove and a center  22   htc  of the third hole do not coincide with each other and may be eccentric. 
     According to the embodiment, the center  22   hrc  of the third groove and the center  22   htc  of the third hole do not coincide, are spaced apart from each other, and are eccentrically disposed in the third regular hole  22   ha  of the third housing  21  in order to increase the accuracy of lens alignment between a plurality of lens groups, and thus there is a technical effect that decenter and lens tilt may be minimized during zooming by increasing the accuracy of alignment between the lens groups. 
     Next, referring to  FIG. 15 , there is a cross-sectional view taken along line A 1 -A 2  of the first region  214 PH in which the first-second protrusion  214   p   2  of the first guide part  210  and the third regular hole  22   ha  of a third housing are coupled. 
     In the embodiment, the first-second protrusion  214   p   2  may protrude from the first guide part  210 , and a first-second recess  214   r   2  in a circular shape may be disposed around the first-second protrusion  214   p   2 . 
     According to the embodiment, a center  214   p   2   c  of the first-second protrusion may not coincide with a center of the first-second recess or the center  22   hrc  of the third groove. 
     According to the embodiment, a center of a protrusion of the first guide part  210  and a center of a groove of the third housing do not coincide, are spaced apart from each other, and are eccentrically disposed in order to increase the accuracy of lens alignment between a plurality of lens groups, and thus there is a technical effect that decenter and lens tilt may be minimized during zooming by increasing the accuracy of alignment between the lens groups. 
     Next,  FIG. 16A  is an illustrative view showing a combination of a base  20  and a first guide part  210  of the camera module according to the embodiment shown in  FIG. 3 , and  FIG. 16B  is a cross-sectional example view showing a combination of a first regular hole  210   ha  and a first base protrusion  22   p   1  of the first guide part  210  shown in  FIG. 16A . 
       FIG. 16C  is a cross-sectional view showing a combination of the base  20  and the first guide part  210  shown in  FIG. 16A . 
     Specifically, in  FIG. 16A , a region in which the first base protrusion  22   p   1  of the base  20  and the first regular hole  210   ha  the first guide part are coupled is indicated by a second region  22 PH, and  FIG. 16C  is a cross-sectional view of a state in which they are coupled. 
     (b) of  FIG. 16B  is a cross-sectional view taken along line A 1 -A 2  in (a) of  FIG. 16B . 
     Referring to  FIG. 16B , the first regular hole  210   ha  of the first guide part  210  may include a first groove  210   hr  and a first hole  210   ht  disposed in the first groove  210   hr.    
     In the embodiment, a center  210   hrc  of the first groove and a center  210   htc  of the first hole do not coincide with each other and may be eccentric. 
     According to the embodiment, a center of the first groove  210   hr  and centers of grooves of the first and second guide parts do not coincide, are spaced apart from each other, and are eccentrically disposed in the first regular hole  210   ha  of the first guide part  210  in order to increase the accuracy of lens alignment between a plurality of lens groups, and thus there is a technical effect that decenter and lens tilt may be minimized during zooming by increasing the accuracy of alignment between the lens group. 
     Next, referring to  FIG. 16C , there is a cross-sectional view along line A 3 -A 4  of the second region  22 PH in which the first base protrusion  22   p   1  of the base  20  and the first regular hole  210   ha  of the first guide part are coupled. 
     In the embodiment, the first base protrusion  22   p   1  may protrude from the base  20 , and a first base recess  20   r  in a circular shape may be disposed around the first base protrusion  22   p   1 . 
     According to the embodiment, a center  22   p   1   c  of the first base protrusion may not coincide with a center of the first base recess or the center  210   htc  of the first groove. 
     According to the embodiment, a center of a protrusion of the base and centers of grooves of the first and second guide parts do not coincide with each other, are spaced apart from each other, and are eccentrically disposed in order to increase the accuracy of lens alignment between a plurality of lens groups, and thus there is a technical effect that decenter and lens tilt may be minimized during zooming by increasing the accuracy of alignment between the lens groups. 
     Referring again to  FIG. 12 , as described above, a third side wall  21   c  of the base may include the fourth-first regular hole  21   ha   1 , the fourth-second regular hole  21   ha , the fourth-first long hole  21   hb   1 , and the fourth-second long hole  21   hb   2 . The base hole may be coupled to the first-third protrusion  214   p   3  and the first-fourth protrusion  214   p   4  of the first guide part  210 , and the second-fourth protrusion (not shown) of the second guide part  220 . 
     At this time, in the embodiment, the fourth-first regular hole  21   ha   1 , the fourth-second regular hole  21   ha  may include a fourth-first groove (not shown) or a fourth-second groove (not shown), respectively. 
     At this time, in the embodiment, a center of the fourth-first groove and a center of the fourth-second groove do not coincide with a center of the fourth-first regular hole and a center of fourth-second regular hole, respectively, and may be eccentric. 
     According to the embodiment, the center of the fourth-first groove and the center of the fourth-second groove do not coincide with the center of the fourth-first regular hole and the center of fourth-second regular hole, respectively, are spaced apart from each other, and are eccentrically disposed in order to increase the accuracy of lens alignment between a plurality of lens groups, and thus there is a technical effect that decenter and lens tilt may be minimized during zooming by increasing the accuracy of alignment between the lens groups. In addition, according to the embodiment, a center of the first-third protrusion  214   p   3  of the first guide part  210  and a center of the second-fourth protrusion (not shown) of the second guide part  220  do not coincide with the center of the fourth-first groove and the center of the fourth-second groove, respectively. 
     According to the embodiment, the center of the first-third protrusion  214   p   3  of the first guide part  210  and the center of the second-fourth protrusion (not shown) of the second guide part  220  do not coincide with the center of the fourth-first groove and the center of the fourth-second groove, respectively, are spaced apart from each other, and are eccentrically disposed in order to increase the accuracy of lens alignment between a plurality of lens groups, and thus there is a technical effect that decenter and lens tilt may be minimized during zooming by increasing the accuracy of alignment between the lens groups. 
     &lt;Magnetic Field Interference Prevention Structure&gt; 
     One of technical problems of embodiments is, when implementing AF or Zoom, to provide a camera actuator capable of preventing a magnetic field interference between magnets mounted on each lens assembly when a plurality of lens assemblies are driven by an electromagnetic force between a magnet and a coil, and a camera module including the same. 
     In addition, one of the technical problems of the embodiments is to provide a camera actuator capable of preventing detachment of a magnet and a yoke, and a camera module including the same. 
       FIG. 17A  is a cross-sectional view taken along line C 1 -C 2  in the camera module according to the embodiment shown in  FIG. 1 . 
     Referring to  FIG. 17 , the camera module  100  according to the embodiment may include a base  20  and a lens assembly disposed on the base  20 . For example, a third lens assembly  130 , a first lens assembly  110 , and a second lens assembly  120  may be sequentially disposed on the base  20  based on a light incident direction, and an image sensor  180  may be disposed on a rear side of the second lens assembly  120 . 
     As described above, the camera module  100  according to the embodiment may be driven by an electromagnetic force of a predetermined magnet and coil part. 
     For example, referring to  FIG. 17A , in the camera module according to the embodiment, the first lens assembly  110  may include a first driving part  116  and a third driving part  141 , and the second lens assembly  120  may include a second driving part  126  and a fourth driving part  142 . 
     The first driving part  116  and the third driving part  141  may be magnet driving parts, and the second driving part  126  and the fourth driving part  142  may be coil driving parts, but the embodiment is not limited thereto. 
     Hereinafter, it will be described as a case in which the first driving part  116  and the third driving part  141  are magnet driving parts, respectively, and the second driving part  126  and the fourth driving part  142  are coil driving parts, respectively. 
     In the camera module according to the embodiment, in the first lens assembly  110 , the first driving part  116  may include a first magnet  116   b  and a first yoke  116   a , and the third driving part  141  may include a first coil part  141   b  and a third yoke  141   a . The third driving part  141  may include a first circuit board  41  between the first coil part  141   b  and the third yoke  141   a.    
     In addition, in the camera module according to the embodiment, in the second lens assembly  120 , the second driving part  126  may include a second magnet  126   b  and a second yoke  126   a , and the fourth driving part  142  may include a second coil part  142   b  and a fourth yoke  142   a . The fourth driving part  142  may include a second circuit board  42  between the second coil part  142   b  and the fourth yoke  142   a.    
     Next,  FIG. 17B  is a driving example view of a camera module according to an embodiment. 
     Referring to  FIG. 17B , as described with reference to  FIG. 8B , the first lens assembly  110  may be driven in an optical axis direction by an electromagnetic force (DEM) between the first magnet  116   b  of the first driving part  116  and the first coil part  141   b  of the third driving part  141 . 
     Next,  FIG. 17C  is a perspective view of the first driving part  116  of the camera module according to the embodiment shown in  FIG. 17B . 
     Referring to  FIG. 17C , in the embodiment, the first driving part  116  may include a first magnet  116   b  and a first yoke  116   a , and the first yoke  116   a  may include a first support portion  116   a   1  and a first side protruding portion  116   a   2  extending from the first support portion  116   a   1  toward a side surface of the first magnet  116   b.    
     The first side protruding portion  116   a   2  may be disposed on both side surfaces of the first magnet  116   b.    
     In addition, the first yoke  116   a  may include a first fixed protruding portion  116   a   3  extending in a different direction, for example, in a direction opposite to the first side protruding portion  116   a   2 . 
     The first fixed protruding portion  116   a   3  may be disposed at a position about a middle of the first support portion  116   a   1 , but the embodiment is not limited thereto. 
     Similarly, in the embodiment, the second driving part  126  may include a second magnet  126   b  and a second yoke  126   a , and the second yoke  126   a  may include a second support portion (not shown) and a second side protruding portion extending from the second support portion toward a side surface of the second magnet  126   b  (hereinbefore, see a structure of the second yoke  126   a  in  FIG. 17A ). 
     The second side protruding portion may be disposed on both side surfaces of the second magnet  126   b . In addition, the second yoke  126   a  may include a second fixed protruding portion (not shown) extending in a different direction, for example, in a direction opposite to the second side protruding portion. The second fixed protruding portion may be disposed at a position about a middle of the second support portion, but the embodiment is not limited thereto. 
     In the related art, in addition, when implementing AF or Zoom, a plurality of lens assemblies are driven by an electromagnetic force between a magnet and a coil, and there is a problem that a magnetic field interference occurs between magnets mounted in each lens assembly. There is a problem that AF or Zoom driving is not performed normally, and thrust is deteriorated due to such a magnetic field interference between magnets. 
     In addition, there is a problem that a decent or tilt phenomenon due to a magnetic field interference between magnets is induced. 
     When an issue in a precision in camera control occurs or thrust is deteriorated due to such a magnetic field interference, or a decent or tilt phenomenon is induced, it may be directly related to the safety or life of a driver who is a user or pedestrian. 
     For example,  FIG. 17D  shows data of a magnetic flux density distribution in Comparative Example. 
     Comparative Example of  FIG. 17D  is a non-disclosed internal technology of an applicant, and has a structure applied so as to perform a shielding function of magnetic flux by disposing a back yoke for a magnet. A shielding performance of the magnetic flux is improved by applying back yoke technology for the magnet, but there are technical problems as follows. 
     For example, referring to  FIG. 17D , it is magnetic flux density data between respective magnets mounted in the first lens assembly and the second lens assembly, and thus there is a problem that magnetic field interference (IF) occurs between the respective magnets, and loss of thrust occurs due to leakage (LE) of the magnetic flux generated in each magnet. 
     In particular, in case of a high-magnification Zoom Actuator applied recently, there is a problem that not only magnetic field interference occurs between permanent magnets of the first lens assembly and the second lens assembly, which are moving lenses, but also the magnetic field interference (IF) with a magnet of the OIS actuator occurs. 
     Movement of each group is disturbed due to the magnetic field interference (IF), and as a result, there is a problem that an input current is also increased. 
     According to the embodiment, a yoke in a magnet driving part of the first lens assembly  110  or the second lens assembly  120  includes a side protruding portion extending to a side surface of the magnet, and thus there is a special technical effect that it is possible to provide a camera actuator capable of preventing a magnetic field interference between magnets mounted on each lens assembly when a plurality of lens assemblies are driven by an electromagnetic force between a magnet and a coil when AF or Zoom is implemented, and a camera module including the same. 
     For example,  FIG. 17E  shows data of a magnetic flux density distribution in Example. 
     Referring to  FIG. 17E , it is magnetic flux density data between respective magnets mounted in the first lens assembly and the second lens assembly, and a yoke in a magnet driving part of the first lens assembly  110  and the second lens assembly  120  includes a side protruding portion extending to a side surface of the magnet, and thus the precision of camera control is improved significantly. 
     In addition, according to the embodiment, the yoke in the magnet driving part of the first lens assembly  110  or the second lens assembly  120  includes the side protruding portion extending to the side surface of the magnet to prevent leakage flux generated in the magnet, and the side protruding portion is disposed in a region having a high magnetic flux density so that the magnetic flux is concentrated (FC), and thus there is a technical effect that thrust is significantly improved by increasing a density between a flux line and the coil to increase the Lorentz Force. 
     Next,  FIG. 17F  is a detailed perspective view of a first yoke  116   a  in the first driving part  116  in Example, and  FIG. 17G  is a bottom perspective view of the first yoke  116   a.    
     The first yoke  116   a  may include a first support portion  116   a   1  and a first side protruding portion  116   a   2  extending from the first support portion  116   a   1  toward a side surface of the first magnet  116   b . The first side protruding portion  116   a   2  may be disposed on both side surfaces of the first magnet  116   b.    
     The first yoke  116   a  may be formed of a ferromagnetic material, but the embodiment is not limited thereto. 
     The first yoke  116   a  may include a first fixed protruding portion  116   a   3  extending in a different direction, for example, in a direction opposite to the first side protruding portion  116   a   2 . In addition, the first yoke  116   a  may include a support portion recess  116   ar  between the first side protruding portion  116   a   2  and the first fixed protruding portion  116   a   3 . Structures of the first side protrusion  116   a   2  and the first fixed protrusion  116   a   3  may be more firmly formed by the support portion recess  116   ar.    
     According to the embodiment, as the first yoke  116   a  includes the first side protruding portion  116   a   2  extending to the side surface of the first magnet  116   b , and the first side protruding portion  116   a   2  is disposed on both sides of the first support portion  116   a   1 , it is possible to serve a function of firmly fixing the first magnet  116   b , thereby significantly improving mechanical reliability. 
     Accordingly, as the first yoke  116   a  includes the first side protruding portion  116   a   2  extending to the side surface of the first magnet  116   b , there is an effect capable of preventing magnetic field interference between magnets mounted in each lens assembly, and there is a complex technical effect that thrust is improved by concentration of magnetic flux and the mechanical reliability is improved by firmly fixing the first magnet  116   b.    
     In addition, the first yoke  116   a  includes the first fixed protruding portion  116   a   3  extending in a different direction, for example, in a direction opposite to the first side protruding portion  116   a   2 , and thus there is an effect that a mechanical coupling force is improved. 
     For example, according to the embodiment, the first yoke  116   a  includes the first fixed protruding portion  116   a   3  extending in a direction opposite to the first side protruding portion  116   a   2 , and the first fixed protruding portion  116   a   3  is fixed to the first lens assembly, thereby improving the mechanical reliability. 
     Meanwhile, according to an additional embodiment, a second thickness T 2  of the first side protruding portion  116   a   2  may be formed thicker than a first thickness T 1  of the first support portion  116   a   1  (see  FIG. 17F ). Accordingly, since the second thickness T 2  of the first side protruding portion  116   a   2  which is a region having a high magnetic flux density is thicker than the first thickness T 1  of the first support portion  116   a   1 , a shielding performance of leakage flux is improved and divergence efficiency of magnetic flux density is increased, so that a shielding function of magnetic flux may be improved and a concentration function of magnetic flux may be enhanced. 
     Next,  FIG. 18A  is a perspective view of a first driving part  116 B of a camera module according to a first additional embodiment. 
     Referring to  FIG. 18A , the third yoke  116 A 3  may include a first support portion  116   a   1 , a first side protruding portion  116   a   2  extending from the first support portion  116   a   1  toward a side surface of the first magnet  116   b , and a first extension protruding portion  116   a   22  extending more upward than an upper surface of the first magnet  116   b  from the first side protruding portion  116   a   2 . 
     Accordingly, the total thickness PL of the first side protruding portion  116   a   2  and the first extension protruding portion  116   a   22  may be greater than a thickness ML of the first magnet  116   b.    
     According to the first additional embodiment, a yoke in a magnet driving part of a first lens assembly  110  and a second lens assembly  120  includes an extension protruding portion extending more upward than an upper surface of a magnet, and thus there is a special technical effect that leakage flux may be more effectively prevented, and thrust may be significantly improved by maximizing concentration of magnetic flux in a region having a high magnetic flux density. 
     Next,  FIG. 18B  is a perspective view of a first driving part  116 C of a camera module according to a second additional embodiment. 
     In the second additional embodiment, the fourth yoke  142   a  may include a first support portion  116   a   1 , a first side protruding portion  116   a   2  extending from the first support portion  116   a   1  toward a first side surface of the first magnet  116   b , and a second side protruding portion  116   a   4  protruding to a second side surface of the first magnet  116   b.    
     The first side surface of the first magnet  116   b  and the second side surface of the first magnet  116   b  may not be facing each other. 
     According to the second additional embodiment, a yoke in a magnet driving part of a first lens assembly  110  and a second lens assembly  120  includes a side protruding portion having a structure surrounding four side surfaces of a magnet, and thus there is a technical effect that leakage flux may be more effectively prevented, and a magnetic flux density in which the leakage flux is prevented may be used to improve thrust. 
     &lt;Camera Module Coupled to OIS Actuator&gt; 
     Next,  FIG. 19  is a perspective view showing a camera module  1000 A to which an OIS actuator  300  is coupled. 
     The camera module  1000 A according to an embodiment may include a single or a plurality of camera actuators. For example, the camera module  1000 A according to the embodiment may include a first camera actuator  100  and a second camera actuator  300 . 
     The first camera actuator  100  supports one or a plurality of lenses, and may perform an autofocus function or a zoom function by moving a lens vertically according to a control signal of a predetermined control unit. In addition, the second camera actuator  300  may be an optical image stabilizer (OIS) actuator, but the embodiment is not limited thereto. 
     Hereinafter, the OIS actuator which is the second camera actuator  300  will be mainly described. 
     Next,  FIG. 20A  is a perspective view of the second camera actuator  300  in the camera module  1000 A of the embodiment shown in  FIG. 19  in a first direction, and  FIG. 20B  is a perspective view of the second camera actuator  300  in the camera module  1000 A of the embodiment shown in  FIG. 19  in a second direction. 
     Referring to  FIGS. 20A and 20B , the second camera actuator  300  of the embodiment may include a housing  310 , an image shaking control unit  320  disposed on the housing  310 , a prism unit  330  disposed on the image shaking control unit  320 , and a second driving part  72 C (see  FIG. 21A ) electrically connected to a second circuit board  350 . 
     Accordingly, according to the embodiment, the image shaking control unit  320  is provided, which is disposed on the housing  310 , and thus there is a technical effect that it is possible to provide an ultra-thin and ultra-small camera actuator and a camera module including the same. 
     In addition, according to the embodiment, the image shaking control unit  320  is disposed below the prism unit  330 , and thus there is a technical effect that when the OIS is implemented, lens size limitation of an optical system lens assembly may be eliminated, and a sufficient amount of light may be secured. 
     In addition, according to the embodiment, the image shaking control unit  320  stably disposed on the housing  310  is provided, and a shaper unit  322  and a first driving part  72 M of  FIG. 22A  described later are included, and thus there is a technical effect that when the OIS is implemented through a lens unit  322   c  including a tunable prism  322   cp , occurrence of a decenter or tilt phenomenon may be minimized to achieve the best optical characteristics. 
     Further, according to the embodiment, when the OIS is implemented, the first driving part  72 M, which is a magnet driving part, is disposed on the second camera actuator  300  separated from the first camera actuator  100 , and thus there is a technical effect that a magnetic field interference with an AF or Zoom magnet of the first camera actuator  100  may be prevented. 
     Furthermore, according to the embodiment, unlike the conventional method of moving a plurality of solid lenses, the OIS is implemented by including the lens unit  322   c  including the tunable prism  322   cp , the shaper unit  322 , and the first driving part  72 M, and thus there is a technical effect that the OIS may be implemented with low power consumption. 
     Hereinafter, the second camera actuator  300  of the embodiment will be described in more detail with reference to the drawings. 
       FIG. 21A  is a perspective view of the second circuit board  350  and the second driving part  72 C of the second camera actuator  300  of the embodiment shown in  FIG. 20B , and  FIG. 21B  is a partially exploded perspective view of the second camera actuator  300  of the embodiment shown in  FIG. 20B , and  FIG. 21C  is a perspective view in which the second circuit board  350  is removed from the second camera actuator  300  of the embodiment shown in  FIG. 20B . 
     First, referring to  FIG. 21A , the second circuit board  350  may be connected to a predetermined power supply (not shown) to apply power to the second driving part  72 C. The second circuit board  350  may include a circuit board having a wiring pattern that may be electrically connected, such as a rigid printed circuit board (Rigid PCB), a flexible printed circuit board (Flexible PCB), and a rigid flexible printed circuit board (Rigid Flexible PCB). 
     The second driving part  72 C may include a single or a plurality of unit driving parts, and may include a plurality of coils. For example, the second driving part  72 C may include a fifth unit driving part  72 C 1 , a sixth unit driving part  72 C 2 , a seventh unit driving part  72 C 3 , and an eighth unit driving part (not shown). 
     In addition, the second driving part  72 C may further include a hall sensor (not shown) to recognize a position of a first driving part  72 M (see  FIG. 21B ) described later. For example, the fifth unit driving part  72 C 1  may further include a first hall sensor (not shown), and the seventh unit driving part  72 C 3  may further include a second hall sensor (not shown). 
     According to the embodiment, the image shaking control unit  320  stably disposed on the housing  310  is provided, and the OIS is implemented through the second driving part  72 C which is a coil driving part, the first driving part  72 M which is a magnet driving part, and the lens unit  322   c  including a tunable prism, and thus occurrence of a decenter or tilt phenomenon may be minimized to achieve the best optical characteristics. 
     In addition, according to the embodiment, unlike the conventional method of moving a plurality of solid lenses, the OIS is implemented by driving the shaper unit  322  through the lens unit  322   c  including the tunable prism, the first driving part  72 M which is a magnet driving part, and the second driving part  72 C which is a coil driving part, and thus there is a technical effect that the OIS may be implemented with low power consumption. 
     Next, referring to  FIG. 21B  and  FIG. 21C , the second camera actuator  300  of the embodiment may include the housing  310 , the image shaking control unit  320  including the shaper unit  322  and the first driving part  72 M and disposed on the housing  310 , the second driving part  72 C disposed on the housing  310 , and a prism unit  330  disposed on the image shaking control unit  320  and including a fixed prism  332 . 
     Referring to  FIG. 21B , the housing  310  may include a predetermined opening  312 H through which light may pass at a housing body  312 , and may include a housing side portion  314 P extending above the housing body  312  and including a driving part hole  314 H in which the second driving part  72 C is disposed. 
     For example, the housing  310  may include a first housing side portion  314 P 1  extending above the housing body  312  and including a first driving part hole  314 H 1  in which the second driving part  72 C is disposed, and a second housing side portion  314 P 2  including a second driving part hole  314 H 2  in which the second driving part  72 C is disposed. 
     According to the embodiment, the second driving part  72 C is disposed on the housing side portion  314 P, and the OIS is implemented by driving the shaper unit  322  and the lens unit  322   c  including the tunable prism through the first driving part  72 M, which is a magnet driving part, and an electromagnetic force, and thus the OIS may be implemented with low power consumption. 
     In addition, according to the embodiment, the OIS is implemented by controlling the lens unit  322   c  including a tunable prism through the second driving part  72 C stably fixed on the housing side portion  314 P and the first driving part  72 M which is a magnet driving part, and thus occurrence of a decenter or tilt phenomenon may be minimized to achieve the best optical characteristics. 
     Next, the fixed prism  332  may be a right-angle prism, and may be disposed inside the first driving part  72 M of the image shaking control unit  320 . In addition, in the embodiment, a predetermined prism cover  334  is disposed above the fixed prism  332  so that the fixed prism  332  may be tightly coupled to the housing  310 , and thus there is a technical effect that prism tilt and occurrence of decenter at the second camera actuator  300  may be prevented. 
     In addition, according to the embodiment, the image shaking control unit  320  is disposed so as to utilize a space below the prism unit  330  and overlap each other, and thus there is a technical effect that it is possible to provide an ultra-thin and ultra-small camera actuator and a camera module including the same. 
     Specifically, according to the embodiment, the prism unit  330  and the lens unit  322   c  including the tunable prism may be disposed very close to each other, and thus there is a special technical effect that even though a change in an optical path is made fine in the lens unit  322   c , the change in the optical path may be widely secured in the actual image sensor unit. 
     For example, referring briefly to  FIG. 25B , a second moving path L 1   a  of light beam changed by the fixed prism  332  may be changed by the tunable prism  322   cp  to be changed to a third moving path L 1   b.    
     At this time, according to the embodiment, the fixed prism  332  and the lens unit  322   c  including the tunable prism may be disposed very close to each other, and a distance between the lens unit  322   c  and an image plane  190 P of the first lens assembly (not shown) may be secured to be relatively long. 
     Accordingly, a first distance D 16  reflected on the image plane  190 P may be secured widely according to a change in an inclination of a predetermined angle C 1  in the tunable prism  322   cp , and thus there is a special technical effect that even though the change in the optical path is made fine in the lens unit  322   c , the change in the optical path may be widely secured in the actual image sensor unit. 
     Next,  FIG. 22A  is an exploded perspective view of the image shaking control unit  320  of the second camera actuator  300  of the embodiment shown in  FIG. 21B , and  FIG. 22B  is a combined perspective view of the image shaking control unit  320  of the second camera actuator of the embodiment shown in  FIG. 22A , and  FIG. 22C  is an exploded perspective view of the first driving part  72 M of the image shaking control unit  320  shown in  FIG. 22A . 
     Referring to  FIGS. 22A and 22B , in the embodiment, the image shaking control unit  320  may include the shaper unit  322  and the first driving part  72 M. 
     The shaper unit  322  may include a shaper body  322   a  including a hole through which light may pass, and a protruding portion  322   b  extending from the shaper body  322   a  to a side surface thereof and coupled to the first driving part  72 M in a first vertical direction. 
     In addition, the shaper unit  322  may include a lens unit  322   c  disposed on the shaper body  322   a  in a second vertical direction opposite to the first vertical direction and including a tunable prism. 
     Accordingly, according to the embodiment, OIS is implemented through the image shaking control unit  320  including the shaper unit  322  and the first driving part  72 M, and the lens unit  322   c  including the tunable prism, and thus there is a technical effect that occurrence of a decenter or tilt phenomenon may be minimized to achieve the best optical characteristics. 
     Specifically, referring to  FIGS. 22A and 22B , the first driving part  72 M may include a single or a plurality of magnet frames  72 MH 1  and  72 MH 2  coupled to the protruding portion  322   b , and a unit driving part disposed on the magnet frames  72 MH 1  and  72 MH 2 . 
     For example, the first driving part  72 M may include a first magnet frame  72 MH 1  and a second magnet frame  72 MH 2 , and a first unit driving part  72 M 1  and a second unit driving part  72 M 2  may be disposed on the first magnet frame  72 MH, and a third unit driving part  72 M 3  and a fourth unit driving part  72 M 4  may be disposed on the second magnet frame  72 MH 2 . 
     Each of the first to fourth unit driving parts  72 M 1 ,  72 M 2 ,  72 M 3 , and  72 M 4  may include first to fourth magnets. 
       FIG. 22C  is an exploded perspective view of the first driving part  72 M of the image shaking control unit  320  shown in  FIG. 22A . 
     In the embodiment, the first driving part  72 M may block the interference of the magnetic field by further including yokes  72 MY disposed on the first and second magnet frames  72 MH 1  and  72 MH 2 . 
     For example, the first magnet frame  72 MH 1  of the first driving part  72 M may include a frame groove  72 MR, and the yoke  72 MY may be disposed on the frame groove  72 MR. Thereafter, the first unit driving part  72 M 1  and the second unit driving part  72 M 2  may be disposed on the yoke  72 MY, respectively. 
     At this time, the yoke  72 MY may include a yoke protruding portion  72 MYP to be firmly coupled to the protruding portion  322   b  of the shaper unit  322 . 
     Next,  FIG. 23  is a perspective view of the shaper unit  322  of the second camera actuator of the embodiment shown in  FIG. 22A . 
     Referring to  FIG. 23 , the shaper unit  322  may include a shaper body  322   a  including an opening through which light may pass, a protruding portion  322   b  extending from the shaper body  322   a  to a side surface thereof and coupled to the first driving part  72 M in a first vertical direction, and a lens unit  322   c  disposed on the shaper body  322   a  in a second vertical direction opposite to the first vertical direction and including a tunable prism  322   cp.    
     Specifically, in the embodiment, the shaper unit  322  may include a plurality of magnet support portions extending from the shaper body  322   a  to both sides thereof, respectively. For example, the shaper unit  322  may include a first protruding portion  322   b   1  and a second protruding portion  322   b   2  that are branched and extend from the shaper body  322   a  to a first side thereof, and a third protruding portion  322   b   3  and a fourth protruding portion  322   b   4  that are branched and extend to a second side thereof. 
     The first driving part  72 M may include first to fourth unit driving parts  72 M 1 ,  72 M 2 ,  72 M 3 , and  72 M 4  coupled to the first to fourth protruding portions  322   b   1 ,  322   b   2 ,  322   b   3 , and  322   b   4 , respectively. 
     Referring to  FIG. 23 , in the embodiment, the shaper unit  322  may include a coupling groove  322   bh  in the magnet support portion to be coupled to a magnet frame. Accordingly, the image shaking control unit  320  as shown in  FIG. 22B  may be coupled to the shaper unit  322 . 
     According to the embodiment, in a state in which the first driving part  72 M is firmly coupled to the shaper unit  322 , OIS is implemented through an optical path control of the lens unit  322   c  including a tunable prism, and thus there is a special technical effect that occurrence of a decenter or tilt phenomenon may be minimized to achieve the best optical characteristics. 
     Next,  FIG. 24  is a cross-sectional view of the lens unit  322   c  taken along line A 1 -A 1 ′ of the shaper unit  322  shown in  FIG. 23 . 
     Referring to  FIG. 24 , in the embodiment, the lens unit  322   c  may include a translucent support  322   c   2 , a bracket  322   cb  disposed on the translucent support  322   c   2  with a predetermined accommodation space, a tunable prism  322   cp  or a liquid lens (not shown) disposed in the accommodation space of the bracket  322   cb , a flexible plate  322   cm  disposed on the tunable prism  322   cp  or the liquid lens, and a second translucent support (not shown) disposed on the flexible plate  322   cm . The flexible plate  322   cm  may be formed of a translucent material. 
     The translucent support  322   c   2  and the second translucent support (not shown) may be formed of a translucent material. For example, the translucent support  322   c   2  and the second translucent support may be formed of glass, but the embodiment is not limited thereto. 
     The translucent support  322   c   2  and the second translucent support may have a hollow circular ring shape or a square ring shape. 
     A size of the second translucent support (not shown) may be formed smaller than that of the accommodation space of the bracket  322   cb.    
     The tunable prism  322   cp  may include an optical liquid disposed in a space created by the translucent support  322   c   2 , the support bracket  322   cb , and the flexible plate  322   cm . Alternatively, the tunable prism  322   cp  may include a wedge prism. 
     In an embodiment, the tunable prism  322   cp  may be a lens made of a fluid, and the fluid lens may have a shape in which a liquid is surrounded by a fluid film, but the embodiment is not limited thereto. 
     In the embodiment, an optical liquid used by the tunable prism  322   cp  may be a transparent, low-fluorescent, non-toxic material. For example, the optical liquid of the embodiment may use a chlorofluorocarbon (CFC) component or the like, but the embodiment is not limited thereto. 
     The bracket  322   cb  may be formed of a stretchable material or a non-stretchable material. For example, the bracket  322   cb  may be formed of an elastic film material or a metal material, but the embodiment is not limited thereto. 
     When the flexible plate  322   cm  receives a predetermined force by the shaper body  322   a  according to movement of the first driving part  72 M, as shown in  FIG. 25B , a part of the flexible plate  322   cm  moves upward or downward due to characteristics of a flexible elastic material, and the form of the tunable prism  322   cp  may be variable. 
     For example, the flexible plate  322   cm  may be a reverse osmosis (RO) membrane, a nano filtration (NF) membrane, an ultra-filtration (UF) membrane, a micro filtration (MF) membrane, and the like, but the embodiment is not limited thereto. Here, the RO membrane may be a membrane having a pore size of about 1 to 15 angstroms, the NF membrane may be a membrane having a pore size of about 10 angstroms, the UF membrane may be a membrane having a pore size of about 15 to 200 angstroms, and the MF membrane may be a membrane having a pore size of about 200 to 1000 angstroms. 
     According to the embodiment, the image shaking control unit  320  stably disposed on the housing  310  is provided, and the shaper unit  322  and the first driving part  72 M are included, and thus there is a technical effect that when the OIS is implemented through the lens unit  322   c  including the tunable prism  322   cp , occurrence of a decenter or tilt phenomenon may be minimized to achieve the best optical characteristics. 
     Next,  FIGS. 25A to 25B  are illustrative views showing an operation of the second camera actuator  300  of the embodiment. 
     For example,  FIG. 25A  is an illustrative view before an operation of the OIS actuator of the embodiment, and  FIG. 25B  is an illustrative view after the operation of the OIS actuator of the embodiment. 
     In a broad sense, the prism in an embodiment may include a fixed prism  332  that changes a path of a predetermined light beam, and a tunable prism  322   cp  that is disposed below the fixed prism  332  and changes a path of a light beam emitted from the fixed prism  332 . 
     Referring to  FIGS. 25A and 25B , the second camera actuator  300  of the embodiment may change a form of the tunable prism  322   cp  through the first driving part  72 M and the second driving part  72 C to control the path of the light beam. 
     For example, in the embodiment, the second camera actuator  300  may control the path of the light beam by changing an apex angle Θ of the tunable prism  322   cp  through the first driving part  72 M which is a magnet driving part. 
     For example, referring to  FIG. 25A , an incident light L 1  is changed to the second moving path L 1   a  by the fixed prism  332 , but the light path is not changed by the tunable prism  322   cp.    
     On the other hand, referring to  FIG. 25B , the second moving path L 1   a  of the light beam changed by the fixed prism  332  may be changed in the tunable prism  322   cp  to be changed to the third moving path L 1   b.    
     For example, when the flexible plate  322   cm  receives a predetermined force by the shaper body  322   a  according to movement of the first driving part  72 M, the second translucent support (not shown) receives the force, and the force is transmitted to the flexible plate  322   cm , and a part of the flexible plate  322   cm  moves upward or downward due to characteristics of a flexible elastic material, and the form of the tunable prism  322   cp  may be variable. 
     For example, as a left upper end of the shaper body  322   a  receives a force F 2  in a second direction by the first unit driving part  72 M 1 , and a right upper end of the shaper body  322   a  receives a force F 1  in a first direction by the second unit driving part  72 M 2 , it may be varied. The second translucent support (not shown) receives a force according to movement of the shaper body  322   a , and the flexible plate  322   cm  may be changed in an inclination of a predetermined angle Θ of by the force. 
     Hereinafter, with reference to  FIG. 25B , in the embodiment, an image stabilizing device for controlling the path of the light beam will be described in further detail by deforming the shape of the tunable prism  322   cp  through the first driving part  72 M. 
     First, according to the embodiment, due to occurrence of camera shake, an image needs to move to a side surface by a first distance D 1 δ on an image plane (not shown) of a lens assembly provided in the first camera actuator  100 . 
     At this time, D 1  is a distance from the tunable prism  322   cp  to the image plane of the lens assembly, δ is a chromatic aberration of the tunable prism  322   cp , and Θ is an apex angle of the tunable prism  322   cp.    
     That is, according to the embodiment, after calculating a changed apex angle Θ of the tunable prism  322   cp , the path of the light beam may be controlled to the third moving path L 1   b  by changing the apex angle Θ of the tunable prism  322   cp  through the first driving part  72 M. 
     At this time, a relationship of δΘ may be established between the chromatic aberration δ of the tunable prism  322   cp  and the apex angle Θ of the tunable prism  322   cp  (where n is a refractive index of the tunable prism  322   cp  with respect to a center wavelength of a band of interest). 
     According to the embodiment, the prism unit  330  and the lens unit  322   c  including the tunable prism may be disposed very close to each other, and thus there is a special technical effect that even though a change in an optical path is made fine in the lens unit  322   c , the change in the optical path may be widely secured in the actual image sensor unit. 
     For example, according to the embodiment, the fixed prism  332  and the lens unit  322   c  including the tunable prism may be disposed very close to each other, and a distance between the lens unit  322   c  and an image plane  190 P of the first lens assembly (not shown) may be secured to be relatively long. Accordingly, a first distance D 1 δ reflected on the image plane  190 P may be secured widely according to a change in an inclination of a predetermined angle Θ in the tunable prism  322   cp , and thus there is a special technical effect that even though the change in the optical path is made fine in the lens unit  322   c , the change in the optical path may be widely secured in the actual image sensor unit. 
     Next,  FIG. 26  is a first operation illustrative view of the second camera actuator of the embodiment. 
     For example,  FIG. 26  is the first operation example view viewed from a z-axis direction of the second camera actuator  300  according to the embodiment shown in  FIG. 20B . 
     Referring to  FIG. 26 , power is applied to the second driving part  72 C through the second circuit board  350 , and a current flows through each coil, and accordingly, an electromagnetic force may be generated between the second driving part  72 C and the first driving part  72 M in a first direction F 1  or a second direction F 2 , and the flexible plate  322   cm  may be tilted at a predetermined angle by the first driving part  72 M that is moved, thereby controlling the apex angle Θ of the tunable prism  322   cp.    
     For example, referring to  FIG. 26 , the first unit driving part  72 M 1  and the second unit driving part  72 M 2  may be disposed so that a direction of the magnetic force may be generated in a direction of the fifth unit driving part  72 C 1  and the sixth unit driving part  72 C 2 , and the third unit driving part  72 M 3  and the fourth unit driving part  72 M 4  may be disposed so that the direction of the magnetic force may be generated in a direction of the seventh unit driving part  72 C 3  and the eighth unit driving part  72 C 4 . 
     At this time, when a current C 1  in the first direction flows in the fifth unit driving part  72 C 1  and the sixth unit driving part  72 C 2 , the force F 2  may be applied in the second direction. On the other hand, when the current C 1  in the first direction flows in the seventh unit driving part  72 C 3  and the eighth unit driving part  72 C 4 , the force F 1  may be applied in the first direction opposite to the second direction. 
     Accordingly, in the first unit driving part  72 M 1  and the second unit driving part  72 M 2 , the force F 2  may be applied to the flexible plate  322   cm  in the second direction, and in the third unit driving part  72 M 3  and the fourth unit driving part  72 M 4 , the force F 1  may be applied to the flexible plate  322   cm  in the first direction, and accordingly, the apex angle Θ of the tunable prism  322   cp  may be deformed at a first angle Θ 1  to change and control the light path. 
     Next,  FIG. 27  is a second operation example view of the second camera actuator  300  of the embodiment. 
     For example,  FIG. 27  is the second operation example view viewed from a z-axis direction of the second camera actuator  300  according to the embodiment shown in  FIG. 20B . 
     For example, power is applied to the second driving part  72 C, and a current flows through each coil, and accordingly, an electromagnetic force may be generated between the second driving part  72 C and the first driving part  72 M in a first direction F 1  or a second direction F 2 , and the flexible plate  322   cm  may be tilted at a predetermined angle. 
     For example, referring to  FIG. 27 , the first unit driving part  72 M 1  and the second unit driving part  72 M 2  may be disposed so that a direction of the magnetic force may be generated in a direction of the fifth unit driving part  72 C 1  and the sixth unit driving part  72 C 2 , and the third unit driving part  72 M 3  and the fourth unit driving part  72 M 4  may be disposed so that the direction of the magnetic force may be generated in a direction of the seventh unit driving part  72 C 3  and the eighth unit driving part  72 C 4 . 
     At this time, a current C 1  in the first direction may flow in the fifth unit driving part  72 C 1  and the seventh unit driving part  72 C 3 , and a current C 2  in the second direction may flow in the sixth unit driving part  72 C 2  and the eighth unit driving part  72 C 4 . 
     Accordingly, the force F 2  may be applied in the second direction in the first unit driving part  72 M 1  and the fourth unit driving part  72 M 4 , and the force F 1  may be applied in the first direction in the second unit driving part  72 M 2  and the third unit driving part  72 M 3 . 
     Accordingly, in the first unit driving part  72 M 1  and the fourth unit driving part  72 M 4 , the force F 2  may be applied to the flexible plate  322   cm  of the variable prism  322   cp  in the second direction, and in the second unit driving part  72 M 2  and the third unit driving part  72 M 3 , the force F 1  may be applied to the flexible plate  322   cm  of the variable prism  322   cp  in the first direction, and accordingly, the apex angle Θ of the tunable prism  322   cp  may be deformed at a second angle Θ 2  to change and control the light path. 
     According to the embodiment, the image shaking control unit  320  is disposed so as to utilize a space below the prism unit  330  and overlap each other, and thus there is a technical effect that it is possible to provide an ultra-thin and ultra-small camera actuator and a camera module including the same. 
     In addition, according to the embodiment, the image shaking control unit  320  is disposed below the prism unit  330 , and thus there is a technical effect that when the OIS is implemented, lens size limitation of an optical system lens assembly may be eliminated, and a sufficient amount of light may be secured. 
     In addition, according to the embodiment, the image shaking control unit  320  stably disposed on the housing  310  is provided, and a shaper unit  322  and a first driving part  72 M are included, and thus there is a technical effect that when the OIS is implemented through a lens unit  322   c  including a tunable prism  322   cp , occurrence of a decenter or tilt phenomenon may be minimized to achieve the best optical characteristics. 
     Further, according to the embodiment, when the OIS is implemented, the first driving part  72 M, which is a magnet driving part, is disposed on the second camera actuator  300  separated from the first camera actuator  100 , and thus there is a technical effect that a magnetic field interference with an AF or Zoom magnet of the first camera actuator  100  may be prevented. 
     Next,  FIG. 28  is another perspective view of a camera module  1000  according to another embodiment. 
     The camera module  1000  according to another embodiment may further include a second camera module  1000 B in addition to the camera module  1000 A described above. The second camera module  1000 B may be a camera module of a fixed focal length lens. The fixed focal length lens may be referred to as a “single focal length lens” or a “single lens”. The second camera module  1000 B may be electrically connected to a third group of circuit boards  430 . The second camera actuator  300  included in the camera module  1000 A may be electrically connected to a second group of circuit boards  420 . 
     INDUSTRIAL APPLICABILITY 
     Next,  FIG. 29  shows a mobile terminal  1500  to which a camera module according to an embodiment is applied. 
     As shown in  FIG. 29 , the mobile terminal  1500  according to the embodiment may include a camera module  1000 , a flash module  1530 , and an autofocus device  1510  provided on a back surface. 
     The camera module  1000  may include an image capturing function and an autofocus function. For example, the camera module  1000  may include an autofocus function using an image. 
     The camera module  1000  processes a still image or a moving image frame obtained by an image sensor in a photographing mode or a video call mode. The processed image frame may be displayed on a predetermined display unit, and may be stored in a memory. A camera (not shown) may be disposed on a front surface of the body of the mobile terminal. 
     For example, the camera module  1000  may include a first camera module  1000 A and a second camera module  1000 B, and OIS may be implemented together with an AF or zoom function by the first camera module  1000 A. 
     The flash module  1530  may include a light-emitting device that emits light therein. 
     The flash module  1530  may be operated by a camera operation of a mobile terminal or by user control. 
     The autofocus device  1510  may include one of packages of a surface emitting laser element as a light-emitting unit. 
     The autofocus device  1510  may include an autofocus function using a laser. The autofocus device  1510  may be mainly used in a condition in which an autofocus function using an image of the camera module  1000  is deteriorated, for example, in a close environment of 10 m or less or a dark environment. The autofocus device  1510  may include a light-emitting unit including a vertical cavity surface emitting laser (VCSEL) semiconductor device, and a light receiving unit that converts light energy into electric energy such as a photodiode. 
     Next,  FIG. 30  is a perspective view of a vehicle  700  to which a camera module according to an embodiment is applied, 
     For example,  FIG. 30  is an appearance view of a vehicle having a vehicle driving assistance device to which a camera module  1000  according to the embodiment is applied. 
     Referring to  FIG. 30 , the vehicle  700  according to the embodiment may include wheels  13 FL and  13 FR that rotate by a power source, and a predetermined sensor. The sensor may be a camera sensor  2000 , but the embodiment is not limited thereto. 
     The camera sensor  2000  may be a camera sensor to which the camera module  1000  according to the embodiment is applied. 
     The vehicle  700  according to the embodiment may acquire image information through the camera sensor  2000  that photographs a front image or a surrounding image, and may determine an unidentified situation of a lane by using the image information and generate a virtual lane at the time of unidentification. 
     For example, the camera sensor  2000  may acquire the front image by photographing a front of the vehicle  700 , and a processor (not shown) may acquire the image information by analyzing an object included in the front image. 
     For example, when an object such as a lane, a neighboring vehicle, a traveling obstacle, and a median strip, a curb, and a street tree corresponding to an indirect road marking is photographed in an image photographed by the camera sensor  2000 , the processor detects such an object to include in the image information. 
     In this case, the processor may acquire distance information with the object detected through the camera sensor  2000  to further complement the image information. The image information may be information about an object captured in the image. 
     Such a camera sensor  2000  may include an image sensor and an image processing module. The camera sensor  2000  may process a still image or moving image obtained by the image sensor (e.g., CMOS or CCD). The image processing module may process the still image or moving image acquired through the image sensor to extract necessary information, and may transmit the extracted information to the processor. 
     At this time, the camera sensor  2000  may include a stereo camera so as to improve the measurement accuracy of the object and to secure more information such as a distance between the vehicle  700  and the object, but the embodiment is not limited thereto. 
     The characteristics, structures and effects described in the embodiments above are included in at least one embodiment but are not limited to one embodiment. Furthermore, the characteristics, structures, effects, and the like illustrated in each of the embodiments may be combined or modified even with respect to other embodiments by those of ordinary skill in the art to which the embodiments pertain. Thus, it would be construed that contents related to such a combination and such a modification are included in the scope of the embodiments. 
     Embodiments are mostly described above, but they are only examples and do not limit the embodiments. A person skilled in the art to which the embodiments pertain may appreciate that several variations and applications not presented above may be made without departing from the essential characteristic of the embodiments. For example, each component particularly represented in the embodiments may be varied. In addition, it should be construed that differences related to such a variation and such an application are included in the scope of the embodiment defined in the following claims.