KR20210017288A - Camera Actuator, Camera module and Camera Apparatus including the same - Google Patents

Abstract

According to an embodiment of the present invention, an ultra-slim and ultra-compact camera actuator comprises: a housing; a prism unit disposed in the housing; and a prism driving unit and a shaft unit disposed in the housing and tilting the prism unit in a first axis direction or a second axis direction. The shaft unit may include a first shaft disposed in a direction parallel to a first direction, and a second shaft and a third shaft disposed in a direction perpendicular to the first direction.

Description

Camera actuator, camera module and camera device including the same {Camera Actuator, Camera module and Camera Apparatus including the same}

The embodiment relates to a camera actuator, a camera module, and a camera device including the same.

The camera module performs a function of photographing a subject and storing it as an image or video, and is mounted on mobile terminals such as mobile phones, laptops, drones, and vehicles.

On the other hand, portable devices such as smartphones, tablet PCs, and laptops have micro-camera modules built-in, and these camera modules automatically adjust the distance between the image sensor and the lens to align the focal length of the lens (autofocus, AF). Function can be performed.

In addition, the recent camera module may perform a zooming function of zooming up or zooming out of photographing by increasing or decreasing the magnification of a distant subject through a zoom lens.

In addition, recently, camera modules employ image stabilization (IS) technology to correct or prevent image shake due to unstable fixing devices or camera movement caused by user movement.

Such image stabilization (IS) technology includes optical image stabilizer (OIS) technology and image stabilization technology using an image sensor.

OIS technology is a technology that corrects motion by changing the path of light, and image shake prevention technology using an image sensor corrects movement in a mechanical and electronic manner, and OIS technology is more widely adopted.

In addition, the vehicle camera module is a product for transmitting images around the vehicle or inside the vehicle to the display, and can be mainly used for parking assistance and driving assistance systems.

In addition, the vehicle camera module detects lanes and vehicles around the vehicle, collects and transmits related data, so that the ECU can warn or control the vehicle.

On the other hand, in the camera module, a zoom actuator is used for the zooming function, and friction torque is generated when the lens is moved by the mechanical movement of the actuator. This friction torque reduces driving force and reduces power consumption. There are technical problems such as increase or decrease in control characteristics.

In particular, in order to obtain the best optical characteristics by using a plurality of zoom lens groups in a camera module, alignment between the plurality of lens groups and alignment between the plurality of lens groups and the image sensor must be well matched. , When the center of the spherical surface between the lens groups is decentered from the optical axis, the tilt, which is a lens inclination, or the central axis of the lens group and the image sensor is not aligned, the angle of view changes or defocusing occurs. It adversely affects image quality and resolution.

On the other hand, in the case of increasing the separation distance in the area where friction occurs in order to reduce the friction torque resistance when the lens is moved for the zooming function in the camera module, the lens decent or the lens when the zoom movement or zoom movement is reversed. There is a contradiction in the technical problem that the tilt is intensifying.

On the other hand, the image sensor has a higher resolution as it goes to a higher pixel, so that the size of the pixel decreases. However, as the pixel becomes smaller, the amount of light received at the same time decreases. Therefore, in a dark environment, the higher the pixel camera, the more severe the blurring of the image due to hand shake appears as the shutter speed becomes slower.

Accordingly, in order to capture an image without distortion using a high-pixel camera in a dark night or in a video, the OIS function has recently been essentially adopted.

On the other hand, OIS technology corrects the image quality by correcting the optical path by moving the lens or image sensor of the camera.In particular, the OIS technology detects the movement of the camera through a gyro sensor and I calculate the distance the image sensor needs to move.

For example, OIS correction methods include a lens shift method and a module tilting method. The lens movement method moves only the lens in the camera module to rearrange the center of the image sensor and the optical axis. On the other hand, the module tilting method moves the entire module including the lens and image sensor.

In particular, the module tilting method has a wider correction range than the lens shift method, and since the focal length between the lens and the image sensor is fixed, there is an advantage of minimizing image deformation.

Meanwhile, in the case of the lens movement method, a Hall sensor is used to detect the position and movement of the lens. On the other hand, in the module tilting method, a photo reflector is used to detect the movement of the module. However, both methods use a gyro sensor to detect the movement of the camera user.

The OIS controller uses the data recognized by the gyro sensor to predict where the lens or module should move to compensate for the user's movement.

Depending on the recent technological trend, ultra-slim and ultra-miniature camera modules are required.In the micro-camera module, there is a problem that it is difficult to implement the OIS function applied in general large cameras due to space constraints for OIS operation. There is a problem in not being able to implement a very small camera module.

On the other hand, according to the closed internal technology, the optical path is controlled using a predetermined variable lens for driving the OIS. However, in recent years, the higher the pixel camera in the camera module, the larger the size of the variable lens for OIS driving is required to increase the amount of light received for clearer image quality. However, when the size of the variable lens increases, the thickness of the camera module is limited. It is facing a technical contradiction that cannot increase the size of the variable lens to a level that can be achieved.

In addition, according to a closed technology, a dual prism OIS actuator technology has been developed in which two prisms each tilt in one axial direction in order to realize high magnification zoom performance. However, in order to implement such a double prism OIS, two independent actuators have to be applied, so there is a problem in that the size of the OIS actuator increases, and as the camera module assembly process becomes complicated, issues of precision or reliability have arisen.

In addition, in the conventional OIS technology, as the OIS driver is disposed on the side of the solid lens assembly within the limited size of the camera module, there is a problem in that it is difficult to secure the amount of light because the size of the lens to be OIS is limited.

In particular, in order to achieve the best optical characteristics in a camera module, the alignment between lens groups must be well matched when implementing OIS through lens movement or tilting of the module.In the conventional OIS technology, the spherical center between the lens groups deviates from the optical axis. When (decent) or tilt, which is a lens inclination phenomenon, changes in the angle of view or out of focus occurs, there is a problem that adversely affects image quality or resolution.

In addition, in the conventional OIS technology, it is possible to implement AF or Zoom at the same time as OIS driving. Due to the space constraints of the camera module and the location of the driving part of the existing OIS technology, the OIS magnet and the AF or Zoom magnet are placed close to each other, causing magnetic field interference. There is a problem in that it is not driven properly, causing a decent or tilt phenomenon.

In addition, the conventional OIS technology requires a mechanical driving device for lens movement or tilting of a module, so the structure is complex and power consumption is increased.

On the other hand, as described above, the camera module can be applied to a vehicle along with a radar, etc., and used for advanced driver assistance systems (ADAS). It can have a big impact.

For example, Advanced Driver Assistance System (ADAS) is an automatic emergency braking system (AEB) that slows or stops the driver without stepping on the brake system in case of a risk of collision. Lane Keep Assist System (LKAS) that maintains the vehicle, Advanced Smart Cruise Control (ASCC) that maintains a distance from the vehicle in front while running at a predetermined speed, reducing the risk of blind spot collision. There is a rear collision avoidance support system (ABSD: Active Blind Spot Detection) that detects and helps to change a safe lane, and an Around View Monitor (AVM) system that visually shows the situation around the vehicle.

In such an advanced driver assistance system (ADAS), the camera module functions as a core component along with a radar, etc., and the weight of the camera module being applied is gradually increasing.

For example, in the case of an automatic emergency braking system (AEB), a vehicle front camera sensor and a radar sensor can detect a vehicle in front or a pedestrian, and automatically provide emergency braking when the driver does not control the vehicle.

Alternatively, in the case of the driving steering assistance system (LKAS), the camera sensor can detect whether the driver leaves the lane without manipulation such as direction indication, and automatically steer the steering wheel to maintain the lane.

In addition, in the case of the Around View Monitoring System (AVM), the situation around the vehicle can be visually displayed through camera sensors arranged in all directions of the vehicle.

When the camera module is applied to the advanced driver assistance system (ADAS) of a vehicle, OIS technology is more important due to the vibration of the vehicle, and the accuracy of the OIS data can be directly related to the safety or life of the 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 magnetic field interference occurs between magnets mounted on each lens assembly. Due to magnetic field interference between these magnets, there is a problem that the thrust force is lowered because AF or zoom cannot be properly driven.

In addition, there is a problem of causing a decent or a tilt phenomenon due to magnetic field interference between magnets.

When there is an issue in the accuracy of camera control due to such magnetic field interference, when the thrust is lowered, or when a decent or tilt phenomenon is caused, the safety or life of a driver or a pedestrian as a user may be directly affected.

In addition, when each component of a camera module, for example, a magnet, etc., is detached or detached in an environment with severe vibration such as a vehicle, it may cause significant problems such as thrust, precision, and control as well as mechanical reliability.

Meanwhile, in the prior art, in order to detect a change in magnetic flux of a predetermined magnet mounted on the moving lens housing, a Hall sensor is disposed inside the winding of the coil to detect the position of the lens housing.

However, when the Hall sensor is located inside the coil, the distance between the Hall sensor and the magnet is determined by the height of the coil.

However, in the prior art, there is a thrust required for the movement of the moving lens housing, and the height of the coil needs to be higher than a predetermined height to secure such thrust.

However, when the height of the coil is increased in this way, since the magnetic flux of the magnet is blocked by the coil, there is a technical contradiction that the sensitivity of the Hall sensor disposed inside the coil is weakened.

According to the applicant's private internal technology, in order to solve this problem, the optimum point of the sensitivity and thrust of the Hall sensor is set by a coil having an appropriate height.

On the other hand, the content described in the item simply provides background information on the present disclosure and does not constitute the prior art.

One of the technical problems of the embodiment is to provide an ultra-slim, ultra-miniature camera actuator and a camera module including the same.

In addition, one of the technical problems of the embodiment is to provide a camera actuator and a camera module including the same so that a sufficient amount of light can be secured by solving the size limitation of the lens in the lens assembly of the optical system when implementing OIS.

In addition, one of the technical problems of the embodiment is that the size of the variable lens for driving OIS must be increased in order to increase the amount of light received for clear image quality. However, when the size of the variable lens is increased, the technical contradiction that the thickness of the camera module is limited. It is intended to provide a camera actuator that can be solved and a camera module including the same.

In addition, one of the technical problems of the embodiment is to provide a camera actuator capable of exhibiting the best optical characteristics by minimizing the occurrence of a decent or tilt phenomenon when implementing OIS, and a camera module including the same.

In addition, one of the technical problems of the embodiment is to provide a camera actuator capable of preventing magnetic field interference with a magnet for AF or Zoom, and a camera module including the same when implementing OIS.

In addition, one of the technical problems of the embodiment is that when a plurality of lens assemblies are driven by an electromagnetic force between a magnet and a coil when implementing AF or Zoom, a camera actuator capable of preventing magnetic field interference between magnets mounted on each lens assembly and the same is included. To provide a camera module that is

In addition, an 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 embodiment is to provide a camera actuator capable of implementing OIS with low power consumption and a camera module including the same.

In addition, one of the technical problems of the embodiment is to provide a camera actuator capable of preventing occurrence of friction torque when a lens is moved through zooming in the camera module, and a camera module including the same.

In addition, one of the technical challenges of the embodiment is to prevent the occurrence of a phenomenon in which the lens decenter or the lens tilt, and the center of the lens and the central axis of the image sensor do not coincide when the lens is moved through zooming in the camera module. It is intended to provide a camera actuator and a camera module including the same.

In addition, one of the technical problems of the embodiment is to provide a camera actuator capable of simultaneously increasing the sensitivity of a Hall sensor while increasing thrust and a camera module including the same.

The technical problem of the embodiment is not limited to that described in this item, and includes what can be grasped from the entire description of the invention.

The camera actuator according to the embodiment includes a housing 310, a prism unit 330 disposed in the housing 310, and a prism unit 330 disposed in the housing 310, and the prism unit 330 is connected to a first axis or a second axis. It includes a prism driving unit 320 and a shaft unit 340 tilting in a direction, and the shaft unit 340 includes a first shaft 341 disposed in a direction parallel to a first direction and perpendicular to the first direction. A second shaft 342 and a third shaft 342 disposed in one direction may be included.

The prism unit 330 may include a prism mover 334 having a seating portion 334A, and a prism 332 disposed on the seating portion 334A of the prism mover 334.

The prism mover 334 includes a first outer surface 334S1 and a second outer surface 334S2 extending upward from both corners of the seating portion 334A, and the first of the prism mover 334 The outer surface 334S1 may include a first recess 334R1, and the second outer surface 334S2 may include a second recess 334R2.

The second shaft 342 and the third shaft 343 may be disposed in the first recess 334R1 and the second recess 334R2, respectively.

The diameters of the first recess 334R1 and the second recess 334R2 of the prism mover 334 may be larger than the diameters of the second shaft 342 and the third shaft 343, respectively.

The prism mover 334 includes a third outer surface 334S3 between the first outer surface 334S1 and the second outer surface 334S2, and a rotation guide area ( AR1) may be included.

The rotation guide area AR1 may include a first guide protrusion 334P1 protruding from the third outer surface 334S3 and a second guide protrusion 334P2 protruding from the first guide protrusion 334P1. .

The first guide protrusion 334P1 may include a third guide recess 334R3, and the second guide protrusion 334P2 may include a fourth guide recess 334R4.

The first shaft 341 of the shaft unit 340 may be disposed in the fourth guide recess 334R4 on the second guide protrusion 334P2.

The second guide protrusion 334P2 protrudes higher than the first guide protrusion 334P1, and the first shaft 341 on the fourth guide recess 334R4 on the second guide protrusion 334P2 Can be placed.

When the prism unit 330 is rotated or tilted in the first axis direction using the first shaft 341 as a rotation axis, the second shaft 342 and the third shaft 343 function as a starter. I can.

The first shaft 341 is disposed on the fourth guide recess 334R4 on the second guide protrusion 334P2 that protrudes more than the first guide protrusion 334P1, so that the first shaft 341 may be rotated or tilted in the second axis direction. have.

When the prism unit 330 is rotated or tilted in a second axis direction using the second shaft 342 and the third shaft 342 as rotation axes, the first shaft 341 is the third guide The recess 334R3 can function as a stopper.

The third outer surface 334S3 of the prism mover includes a 3-1 seating portion 334S3a and a 3-2 seating portion 334S3b, and the 3-1 seating portion 334S3a and the third 2 A fourth magnet 322M4 and a first magnet 322M1 may be disposed in the seating portion 334S3b, respectively.

The camera actuator according to the embodiment may include a housing 310, a prism unit 330 disposed in the housing 310, a driving unit for tilting the prism unit, and first to third shafts.

The housing may include a housing base, a first sidewall, a second sidewall facing the first sidewall, and a third sidewall disposed between the first sidewall and the second sidewall.

The housing base may include a first recess protruding from the housing base in a region close to the first sidewall and a second recess protruding from the housing base in a region close to the second sidewall.

The second shaft is disposed in the first recess, the third shaft is disposed in the second recess, and the first shaft is disposed in the third recess formed in the first sidewall and the second sidewall. It may be disposed in the formed fourth recess.

A direction of a major axis of the second shaft and the third shaft may be perpendicular to a direction of a major axis of the'th shaft.

The prism unit 330 includes a prism mover 334 having a seating portion 334A, and a prism 332 disposed on the seating portion 334A of the prism mover 334, and the prism mover ( 334 includes a third outer surface 334S3 between the first outer surface 334S1 and the second outer surface 334S2, and includes a rotation guide area AR1 on the third outer surface 334S3 can do.

The rotation guide area AR1 may include a first guide protrusion 334P1 protruding from the third outer surface 334S3 and a second guide protrusion 334P2 protruding from the first guide protrusion 334P1. .

The first guide protrusion 334P1 includes a third guide recess 334R3, the second guide protrusion 334P2 includes a fourth guide recess 334R4, and the second guide protrusion 334P2 The first shaft 341 of the shaft unit 340 may be disposed in the upper fourth guide recess 334R4.

The second guide protrusion 334P2 protrudes higher than the first guide protrusion 334P1, and the first shaft 341 on the fourth guide recess 334R4 on the second guide protrusion 334P2 Can be placed.

When the prism unit 330 is rotated or tilted in the first axis direction using the first shaft 341 as a rotation axis, the second shaft 342 and the third shaft 343 function as a starter. I can.

The first shaft 341 is disposed on the fourth guide recess 334R4 on the second guide protrusion 334P2 that protrudes more than the first guide protrusion 334P1, so that the first shaft 341 may be rotated or tilted in the second axis direction. have.

When the prism unit 330 is rotated or tilted in a second axis direction using the second shaft 342 and the third shaft 342 as rotation axes, the first shaft 341 is the third guide The recess 334R3 can function as a stopper.

The camera module of the embodiment may include a lens assembly, an image sensor unit disposed on one side of the lens assembly, and any one camera actuator disposed on the other side of the lens assembly.

According to the embodiment, there is a technical effect of providing an ultra-slim, ultra-small camera actuator, and a camera module including the same.

For example, according to an embodiment, by implementing OIS with the prism driving unit 320 and the shaft unit 340 disposed in the housing 310, the size limit of the lens in the lens assembly of the optical system is eliminated, and thus an ultra-slim, ultra-small camera actuator And there is a technical effect that can provide a camera module including the same.

In addition, according to the embodiment, there is a technical effect of providing a camera actuator capable of securing a sufficient amount of light by removing a size limitation of a lens in a lens assembly of an optical system when implementing OIS, and a camera module including the same.

For example, according to the embodiment, by implementing OIS by rotating in the first and second axis directions of the prism unit 230 itself, it is possible to secure sufficient light quantity by solving the size limitation of the lens in the lens assembly of the optical system when implementing OIS. There is a technical effect that can provide a possible camera actuator and a camera module including the same.

In addition, according to an embodiment, the prism unit 330 is rotated to the first axis or the second axis by electromagnetic force between the magnet disposed on the prism mover 334 and the coil unit disposed on the housing. There is a technical effect that can produce the best optical properties by minimizing the occurrence of a decent or tilt phenomenon.

In addition, according to the embodiment, there is a technical effect of providing a camera actuator capable of exhibiting the best optical characteristics by minimizing the occurrence of a decent or a tilt phenomenon when implementing OIS, and a camera module including the same.

For example, according to the embodiment, when the OIS is implemented by controlling the rotation of the prism unit 330 to the first axis or the second axis by providing the prism driving unit 320 stably disposed on the housing 310 There is a technical effect that can produce the best optical properties by minimizing the occurrence of) or tilt.

Further, according to the embodiment, there is a technical effect of providing a camera actuator capable of implementing OIS with low power consumption and a camera module including the same.

For example, according to the embodiment, unlike moving a plurality of conventional solid lenses, the prism drive unit 320 and the shaft unit 340 are provided to control the rotation of the prism unit 330 to the first axis or the second axis. By implementing OIS, there is a technical effect of providing a camera actuator capable of implementing OIS with low power consumption and a camera module including the same.

According to the camera actuator and the camera module including the same according to the embodiment, there is a technical effect capable of solving the problem of generating friction torque during zooming.

For example, according to the embodiment, when the lens assembly is driven in a state in which the first guide part and the second guide part, which are precisely controlled numerically in the base, are driven, the friction torque is reduced to reduce the frictional resistance. There are technical effects such as improvement of driving power, reduction of power consumption, and improvement of control characteristics.

In the prior art, when the guide rail is disposed on the base itself, it is difficult to manage dimensions because a gradient occurs according to the injection direction, and when the injection is not properly injected, there is a technical problem in that the driving force increases due to increased friction torque.

On the other hand, according to the embodiment, a special technical effect that can prevent the occurrence of a gradient according to the injection direction by separately adopting the first guide part and the second guide part separately formed and assembled from the base without placing the guide rail on the base itself. There is.

In addition, the camera actuator and the camera module including the same according to the embodiment have a technical effect of simultaneously increasing the sensitivity of the Hall sensor while increasing thrust.

In addition, according to the embodiment, there is a technical effect of providing a camera actuator capable of preventing magnetic field interference with a magnet for AF or zoom, and a camera module including the same when implementing OIS.

In addition, according to an embodiment, when a plurality of lens assemblies are driven by an electromagnetic force between a magnet and a coil when implementing AF or Zoom, a camera actuator capable of preventing magnetic field interference between magnets mounted on each lens assembly and a camera module including the same is provided. There are technical effects that can be provided.

In addition, the embodiment has a technical effect of providing a camera actuator capable of preventing detachment of a magnet and a yoke, and a camera module including the same.

The technical effects of the embodiments are not limited to those described in this item, and include those that can be grasped from the entire description of the invention.

1 is a perspective view of a camera module according to an embodiment.
FIG. 2 is a perspective view of a second camera actuator in the camera module according to the embodiment shown in FIG. 1.
3A is a perspective view in which a second case is omitted from the second camera actuator shown in FIG. 2.
3B is an exploded perspective view of the second camera actuator shown in FIG. 3A.
4A is a perspective view of a prism unit in the second camera actuator shown in FIG. 3B.
4B is an exploded perspective view in a first direction of the prism unit shown in FIG. 4A.
5A is a second perspective view of the prism mover in the prism unit shown in FIG. 4B.
5B is an enlarged view of the rotation guide area of the prism mover shown in FIG. 5A.
6A is a perspective view in which a prism unit and a second circuit board are omitted from the second camera actuator shown in FIG. 3B.
6B is an exploded perspective view of the second camera actuator shown in FIG. 6A.
7A is an exploded perspective view of a housing and a shaft unit in the second camera actuator shown in FIG. 6B.
Figure 7b is a detailed view of the housing shown in Figure 7a.
8 is an exploded perspective view of a prism driving unit in the second camera actuator shown in FIG. 6B.
9A is a perspective view of the second camera actuator shown in FIG. 1B.
9B is a first cross-sectional view of the second camera actuator shown in FIG. 9A.
9C is an exemplary view of rotation of the second camera actuator shown in FIG. 9B.
10A is a perspective view of the second camera actuator shown in FIG. 1B.
10B is a second cross-sectional view of the second camera actuator shown in FIG. 10A.
10C is an exemplary view of rotation of the second camera actuator shown in FIG. 10B.
11 is a perspective view of a first camera actuator according to the embodiment.
12 is a perspective view of the camera actuator according to the embodiment shown in FIG. 11 with some components omitted.
13 is an exploded perspective view of the camera actuator according to the embodiment shown in FIG. 11 with some components omitted.
14 is a perspective view of a first guide part and a second guide part in the camera actuator according to the embodiment shown in FIG. 13.
15A is a perspective view of a first lens assembly in the camera actuator according to the embodiment shown in FIG. 13.
15B is a perspective view of the first lens assembly shown in FIG. 15A with some components removed.
16 is an exemplary view of driving in a camera actuator according to an embodiment.
17 is a cross-sectional view taken along line C1-C2 in the camera actuator according to the embodiment shown in FIG. 11;
18A is an enlarged view of area S shown in FIG. 17;
18B is a detailed view of the S area shown in FIG. 17;
18C is a magnetic flux data according to a separation distance between a magnet and a position detection sensor in Examples and Comparative Examples.
19A is a perspective view of the first driving unit 116 in the camera actuator according to the embodiment.
19B is magnetic flux density distribution data in a comparative example.
Fig. 19C is magnetic flux density distribution data in Examples.
20 is an exemplary view of an integrated body in a camera module according to another embodiment.
21 is a perspective view of a mobile terminal to which a camera module according to an embodiment is applied.
22 is a perspective view of a vehicle to which a camera module according to an embodiment is applied.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. Since the embodiments can be modified in various ways and have various forms, specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the embodiments to a specific form of disclosure, and it should be understood that all changes, equivalents, and substitutes included in the spirit and scope of the embodiments are included.

Terms such as "first" and "second" may be used to describe various elements, but the elements should not be limited by the terms. The terms are used for the purpose of distinguishing one component from another component. In addition, terms specifically defined in consideration of the configuration and operation of the embodiment are only for describing the embodiment, and do not limit the scope of the embodiment.

In the description of the embodiment, in the case of being described as being formed on the "top (top)" or "bottom (on or under)" of each element, the top (top) or bottom (bottom) (on or under) ) Includes both elements in which two elements are in direct contact with each other or in which one or more other elements are indirectly formed between the two elements. In addition, when expressed as “up (up)” or “on or under”, the meaning of not only an upward direction but also a downward direction based on one element may be included.

In addition, relational terms such as "top/top/top" and "bottom/bottom/bottom" used below do not necessarily require or imply any physical or logical relationship or order between such entities or elements, It may be used to distinguish one entity or element from another entity or element.

(Example)

1 is a perspective view of a camera module 1000A according to an embodiment.

Referring to FIG. 1, the camera module 1000A according to the embodiment may include a single or a plurality of camera actuators. For example, the camera module 1000A of the embodiment may include a first camera actuator 100 and a second camera actuator 300.

The embodiment may include a case 100C for protecting the first camera actuator 100 and the second camera actuator 300. For example, the case 100C may include a first case 100C1 for protecting the first camera actuator 100 and a second case 100C2 for protecting the second camera actuator 300. The first case 100C1 and the second case 100C2 may be integrally formed or may be formed in separate forms.

The first camera actuator 100 may be electrically connected to the first circuit board 410, and the second camera actuator 300 may be electrically connected to the second circuit board 350 (see FIG. 2) to be described later. Can be connected. The first circuit board 410 and the second circuit board may also be electrically connected.

The first camera actuator 100 may support one or a plurality of lenses and may perform an auto focusing function or a zoom function by moving the lenses up and down in response to a control signal from a predetermined controller. In addition, the second camera actuator 300 may be an OIS (Optical Image Stabilizer) actuator, but is not limited thereto.

Hereinafter, an OIS actuator, which is the second camera actuator 300, will be mainly described, and thereafter, the first camera actuator 100 will be described.

<Second camera actuator>

2 is a perspective view of the second camera actuator 300 in the camera module 1000A according to the embodiment shown in FIG. 1, and FIG. 3A is a second case 100C2 in the second camera actuator 300 shown in FIG. ) Is a perspective view, and FIG. 3B is an exploded perspective view of the second camera actuator 300 shown in FIG. 3A.

Referring to FIG. 2, in the second camera actuator 300 of the embodiment, a housing 310, a prism unit 330, and a second circuit board 350 may be disposed in a second case 100C2.

Next, referring to FIGS. 3A and 3B, the second camera actuator 300 of the embodiment includes a housing 310, a prism driving unit 320, a prism unit 330, and a shaft unit ( 340 and a second circuit board 350 electrically connected to the prism driving unit 320.

The second circuit board 350 is a circuit board having a wiring pattern that can 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). Can include.

Referring to FIG. 3B, the second circuit board 350 includes a second body board 350a, a 2-1 extension board 350b extending in a vertical direction from the second body board 350a, and a second body board 350a. A second extended substrate 350c and a 2-3rd extended substrate 350d may be included. The 2-1 extension board 350b, the 2-2 extension board 350c, and the 2-3 extension board 350d include a first coil part 323C1, a second coil part 323C2, and Power may be applied to each of the third coil units 323C3 (refer to FIG. 8 ).

According to the embodiment, by implementing OIS with the prism driving unit 320 and the shaft unit 340 disposed in the housing 310, the size limit of the lens in the lens assembly of the optical system is eliminated, and thus an ultra-slim, ultra-miniature camera actuator and the same There is a technical effect that can provide a camera module.

In addition, according to the embodiment, the prism drive unit 320 and the shaft unit 340 stably disposed on the housing 310 are provided to control the rotation of the prism unit 330 to the first axis or the second axis. There is a technical effect that can produce the best optical properties by minimizing the occurrence of a decent or tilt phenomenon.

In addition, according to an embodiment, unlike moving a plurality of existing solid lenses, the prism drive unit 320 and the shaft unit 340 are provided to control the rotation of the prism unit 330 to the first axis or the second axis to implement OIS. There is a technical effect that can implement OIS with low power consumption.

<Second camera actuator 300>

The second camera actuator 300 of the embodiment will be described in detail with reference to the following drawings.

4A is a perspective view of the prism unit 330 in the second camera actuator 300 shown in FIG. 3B, and FIG. 4B is an exploded perspective view in the first direction, for example, the front direction of the prism unit 330 shown in FIG. 4A to be.

4B, in the second camera actuator of the embodiment, the prism unit 330 is disposed on the prism mover 334 having a seating portion 334A, and a seating portion 334A of the prism mover 334. It may include a prism 332. The prism 332 is a reflective part, and may be a right-angled prism, but is not limited thereto.

The prism mover 334 may include a plurality of outer surfaces. For example, the prism mover 334 may include a first outer surface 334S1 and a second outer surface 334S2 extending upward from both corners of the seating portion 334A having an inclined surface.

In addition, the first outer surface 334S1 of the prism mover 334 may include a first recess 334R1, and the second outer surface 334S2 may include a second recess 334R2.

The second shaft 342 and the third shaft 343 of the shaft unit 340 may be respectively disposed in the first recess 334R1 and the second recess 334R2 (refer to FIG. 7A for each shaft). ).

According to the embodiment, the prism driving unit 320 and the shaft unit 340 disposed in the housing 310 are provided to rotate the prism unit 330 in one or two axes to implement OIS. There is a technical effect that can provide an ultra-slim, ultra-small camera actuator and a camera module including the same by solving the size limitation.

Next, FIG. 5A is a perspective view of the prism mover 334 in the second direction in the prism unit shown in FIG. 4B, and FIG. 5B is an enlarged view of the rotation guide area AR1 of the prism mover 334 shown in FIG. 5A.

First, referring to FIG. 5A, the prism mover 334 may include a third outer surface 334S3 between a first outer surface 334S1 and a second outer surface 334S2, and the third outer surface ( The rotation guide area AR1 may be disposed in 334S3.

In addition, the third outer surface 334S3 may include a 3-1 seating portion 334S3a and a 3-2 seating portion 334S3b. A fourth magnet 322M4 and a first magnet 322M1 may be disposed on the 3-1 seating portion 334S3a and the 3-2 seating portion 334S3b, respectively (refer to FIG. 8 for each magnet).

According to an embodiment, the prism unit 330 is rotated to the first axis or the second axis by electromagnetic force between the magnet disposed on the prism mover 334 and the coil unit disposed on the housing, thereby implementing the OIS. There is a technical effect that can produce the best optical properties by minimizing the occurrence of (decent) or tilt.

Next, referring to FIG. 5B, the rotation guide area AR1 includes a first guide protrusion 334P1 protruding from the third outer surface 334S3 and a second guide protrusion protruding from the first guide protrusion 334P1 ( 334P2).

The first guide protrusion 334P1 may include a third guide recess 334R3, and the second guide protrusion 334P2 may include a fourth guide recess 334R4.

According to an embodiment, the first shaft 341 (refer to FIG. 7A) of the shaft unit 340 is disposed in the fourth guide recess 334R4 on the second guide protrusion 334P2, so that the first shaft or the second shaft direction May be capable of rotating or tilting.

For example, the first shaft 341 is disposed on the fourth guide recess 334R4 on the second guide protrusion 334P2 that protrudes more than the first guide protrusion 334P1, thereby rotating in the Y-axis direction or Tilting control may be possible (see FIGS. 9A to 9C).

At this time, when the prism unit 330 is rotated or tilted in the Y-axis direction, the second shaft 342 and the third shaft 343 may function as a starter.

In addition, since the first shaft 341 is disposed on the fourth guide recess 334R4 on the second guide protrusion 334P2 that protrudes more than the first guide protrusion 334P1, the clearance to be rotated or tilted in the X-axis direction is reduced. By securing, rotation or tilt control in the X-axis direction may be possible (see FIGS. 10A to 10C).

At this time, when the prism unit 330 is rotated or tilted in the X-axis direction, the first shaft 341 may function as a starter by the third guide recess 334R3.

Next, FIG. 6A is a perspective view in which the prism unit 330 and the second circuit board 350 are omitted from the second camera actuator shown in FIG. 3B, and FIG. 6B is an exploded perspective view of the second camera actuator shown in FIG. 6A. .

6A and 6B, the second camera actuator 300 may include a housing 310, a prism driving unit 320 disposed on the housing 310, and a shaft unit 340.

According to an embodiment, the prism driving unit 320 and the shaft unit 340 disposed in the housing 310 are provided to rotate the prism unit 330 in the first axis and the second axis direction to implement OIS, thereby implementing the lens of the optical system. There is a technical effect that can provide an ultra-slim, ultra-compact camera actuator and a camera module including the same by solving the size limit of the lens in the assembly.

Next, FIG. 7A is an exploded perspective view of the housing 310 and the shaft unit 340 in the second camera actuator shown in FIG. 6B, and FIG. 7B is a detailed view of the housing 310 shown in FIG. 7A.

Referring to FIG. 7A, the shaft unit 340 may include a first shaft 341, a second shaft 342, and a third shaft 343.

The first shaft 341 is disposed in the fourth guide recess 334R4 (see FIG. 5B) on the second guide protrusion 334P2 of the prism mover 334 to rotate or tilt in the direction of the first or second axis. This could be possible.

In addition, the second shaft 342 and the third shaft 343 have a first recess 334R1 of a first outer surface 334S1 of the prism mover 334 and a second recess 334R1 of the second outer surface 334S2. It may be disposed in the recess 334R2 (see Fig. 4B).

According to the embodiment, the prism driving unit 320 and the shaft unit 340 disposed in the housing 310 are provided to rotate the prism unit 330 in one or two axes to implement OIS. There is a technical effect that can provide an ultra-slim, ultra-small camera actuator and a camera module including the same by solving the size limitation.

With continued reference to FIG. 7A, the housing 310 of the embodiment may include a housing body 312B, a single or a plurality of housing side portions 312S1, 312S2, 312S3, and an upper housing 312T.

For example, the housing 310 may include a first housing side 312S1, a second housing side 312S2, and a third housing side 312S3 extending in one direction from the housing body 312B. .

The housing body 312B includes a 2-1 guide groove 314H2a into which a lower portion of the second shaft 342 can be inserted and a 3-1 guide groove through which a lower portion of the third shaft 343 can be inserted. 314H3a).

In this case, the first housing side 312S1 may include a first protrusion 312P1 and a 2-2 recess 314H2b disposed in the first protrusion 312P1. The 2-2 recess 314H2b may be formed at an upper position of the 2-1 guide groove 314H2a of the housing body 312B. An upper portion of the second shaft 342 may be disposed in the 2-2 recess 314H2b.

In addition, the second housing side 312S2 may include a second protrusion 312P2 and a 3-2 recess 314H3b disposed in the second protrusion 312P2. The 3-2 recess 314H3b may be formed at an upper position of the 3-1 guide groove 314H3a of the housing body 312B. An upper portion of the third shaft 343 may be disposed in the 3-2 recess 314H3b.

When the second shaft 342 and the third shaft 343 are rotated or tilted in the X-axis direction of the prism unit 330, the prism unit 330 may function as a rotation axis. When rotated or tilted, the first shaft 341 may function as a starter.

Next, referring to FIG. 7A, the third housing side 312S3 includes a 1-1 guide hole 314H1a and a 1-2 guide hole 314H1b into which the first shaft 341 can be inserted. can do. The third housing side 312S3 may further include a 1-1 guide recess and a 1-2 guide recess outside the 1-1 guide hole 314H1a and the 1-2 guide hole 314H1b. have.

According to an embodiment, both sides of the first shaft 341 are inserted into the 1-1 guide hole 314H1a and the 1-2 guide hole 314H1b of the third housing side 312S3, and the first shaft 341 ) Is disposed in the fourth guide recess 334R4 on the second guide protrusion 334P2 of the prism mover 334, so that rotation or tilt control in the Y-axis direction may be possible (see FIGS. 9A to 9C). . At this time, when the prism unit 330 is rotated or tilted in the Y-axis direction, the second shaft 342 and the third shaft 343 may function as a starter.

According to the embodiment, the prism driving unit 320 and the shaft unit 340 disposed in the housing 310 are provided to rotate the prism unit 330 in one or two axes to implement OIS. There is a technical effect that can provide an ultra-slim, ultra-small camera actuator and a camera module including the same by solving the size limitation.

Next, referring to FIG. 7B, the housing body 312B may include a first opening 316R1, a second opening 316R2, and a third opening 316R3. A first coil part 323C1 is provided in the first opening 316R1, a second coil part 323C2 is provided in the second opening 316R2, and a third coil part 323C3 is provided in the third opening 316R3. It may be disposed (refer to FIG. 8 for each coil part). The first opening 316R1, the second opening 316R2, and the third opening 316R3 may each be in the form of a through hole in which the housing body 312B is partially removed, but is not limited thereto, and a part of the housing body 312B It may be in the form of a recessed area with only the surface removed.

According to an embodiment, the prism unit 330 is rotated to the first axis or the second axis by electromagnetic force between the magnet disposed on the prism mover 334 and the coil unit disposed on the housing. There is a technical effect that can produce the best optical properties by minimizing the occurrence of decent or tilt.

Next, FIG. 8 is an exploded perspective view of the prism driving unit 320 in the second camera actuator shown in FIG. 6B.

Referring to FIG. 8, the prism driving unit 320 functions as an OIS driving unit, and a first coil unit 323C1, a second coil unit 323C2, a third coil unit 323C3, a first magnet 322M1, and A second magnet 322M2, a third magnet 322M3, a fourth magnet 322M4, and a position sensor HS may be included. The position sensor HS may include a Hall sensor. In addition, the prism driving unit 320 may include a back yoke.

For example, the prism driving unit 320 may include a first coil unit 323C1 disposed in the first opening 316R1 of the housing body 312B, and a first coil unit 323C1 disposed in the second opening 316R2 of the housing body 312B. 2 The coil unit 323C2 and a third coil unit 323C3 disposed in the third opening 316R3 of the housing body 312B may be included.

In addition, the prism driving unit 320 includes a first magnet 322M1 disposed at a position corresponding to the first coil unit 323C1, and a second magnet 322M2 disposed at a position corresponding to the second coil unit 323C2. , It may include a third magnet (322M3) disposed at a position corresponding to the third coil unit (323C3).

In addition, the prism driving unit 320 may include a fourth magnet 322M4 at a position corresponding to the position sensor HS.

The first magnet 322M1 may be disposed on the 3-2 seating portion 334S3b of the third outer surface 334S3 of the prism mover, and the fourth magnet 322M4 is the third outer surface 334S3 of the prism mover. ) May be disposed on the 3-1 seating portion 334S3a (see FIG. 5A above).

In an embodiment, the first to third magnets 322M1, 322M2, 322M3 function as a driving unit that forms a driving force by electromagnetic force, and the fourth magnet 322M4 acts with a position sensor HS to sense a position. can do.

For example, the first magnet 322M1 may generate an electromagnetic force with the first coil unit 323C1 to tilt or rotate the prism unit 330 in the Y-axis direction (see FIGS. 9A to 9C). .

In addition, the second magnet 322M2 and the third magnet 322M3 form an electromagnetic force with the second coil unit 323C2 and the third coil unit 323C3, respectively, so that the prism unit 330 in the X-axis direction. Can be tilted or rotated (see FIGS. 10A to 10C)

In addition, the prism driving unit 320 includes a first back yoke 324Y1 disposed on the rear surface of the first magnet 322M1 and a second back yoke 324Y2 and a third magnet disposed on the rear surface of the second magnet 322M2. It may include a third back yoke (324Y3) disposed on the rear of the 322M3). Also, the embodiment may include a fourth back yoke 324Y4 disposed on the rear surface of the fourth magnet 322M4.

In addition, the prism driving unit 320 may include a 2-2 back yoke 324Y2b under the second back yoke 324Y2 and a 3-2 back yoke 324Y3b under the third back yoke 324Y3. .

According to the embodiment, the prism unit 330 is rotated to the first axis or the second axis by the electromagnetic force between the magnet and the coil unit, thereby minimizing the occurrence of decent or tilt when implementing OIS. There is a technical effect that can produce optical properties.

In addition, according to an embodiment, by implementing OIS with the prism driving unit 320 and the shaft unit 340 disposed in the housing 310, the size limit of the lens in the lens assembly of the optical system is eliminated, thereby including an ultra-slim, ultra-miniature camera actuator and the same. There is a technical effect that can provide a camera module.

In addition, according to the embodiment, the technical effect of accurately measuring and controlling the position when tilting in the first axis direction and the second axis direction is achieved by only arranging one position sensor HS at a position corresponding to the fourth magnet 322M4. have.

Next, FIG. 9A is a perspective view of the second camera actuator 300 shown in FIG. 1B, FIG. 9B is a first cross-sectional view of the second camera actuator 300 shown in FIG. 9A, and FIG. 9C is a diagram shown in FIG. 9B. It is an exemplary view of rotation of the second camera actuator 300.

For example, FIG. 9B is a first cross-sectional view taken along line A1-A1' of the second camera actuator 300 shown in FIG. 9A and perpendicular to the length direction of the first shaft 341.

For example, FIG. 9B is a cross-sectional view in a direction perpendicular to the X axis when the longitudinal direction of the first shaft 341 is referred to as the X axis.

Referring to FIG. 9B, while the prism mover 334 is rotated in a first axis perpendicular to the X axis, for example, in the Y axis direction, OIS may be implemented.

For example, the first magnet 322M1 disposed on the prism mover 334 forms an electromagnetic force with the first coil unit 323C1 disposed in the housing 310 to tilt the prism unit 330 in the Y-axis direction. Or you can rotate it.

Specifically, referring to FIG. 5A, the first magnet 322M1 may be disposed on the 3-2 seating portion 334S3b of the third outer surface 334S3 of the prism mover 334, and the fourth magnet 322M4 ) May be disposed on the 3-1 seating portion 334S3a of the third outer surface 334S3 of the prism mover.

Also, referring to FIG. 5B, in the embodiment, the first shaft 341 is disposed on the fourth guide recess 334R4 on the second guide protrusion 334P2 that protrudes more than the first guide protrusion 334P1. Rotation or tilt control in the axial direction may be possible. At this time, when the prism unit 330 is rotated or tilted in the Y-axis direction, the second shaft 342 and the third shaft 343 may function as a starter.

Next, referring to FIG. 9C, in an embodiment, in a state in which the first shaft 341 is disposed on the fourth guide recess 334R4 on the second guide protrusion 334P2 of the prism mover 334, the prism mover The prism unit 330 is at a first angle Θ1 in the Y-axis direction by the first electromagnetic force F1 between the first magnet 322M1 disposed at 334 and the first coil unit 323C disposed at the housing. OIS can be implemented while rotating (Y1->Y1a). The first angle Θ1 may be ±1° to 1.5°, that is, 2° to 3°.

At this time, when the prism unit 330 is rotated or tilted in the Y-axis direction, the second shaft 342 and the third shaft 343 may function as a starter.

For example, referring to FIG. 4B, the diameters of the first and second recesses 334R1 and 334R2 of the prism mover 334 are respectively larger than the diameters of the second shaft 342 and the third shaft 343. The large design provides a clearance for the prism unit 330 to rotate in the Y-axis direction, and the second shaft 342 and the third shaft 343 may function as a starter when rotating in the Y-axis direction. .

Next, FIG. 10A is a perspective view of the second camera actuator 300 shown in FIG. 1B, FIG. 10B is a second cross-sectional view of the second camera actuator 300 shown in FIG. 10A, and FIG. 10C is a diagram shown in FIG. 10B. It is an exemplary view of rotation of the second camera actuator 300.

For example, FIG. 10B is a cross-sectional view in a direction horizontal to the X axis when the longitudinal direction of the first shaft 341 is the X axis. 10B is a cross-sectional view in a direction perpendicular to the second shaft 342 and the third shaft 343.

Referring to FIG. 10B, when the longitudinal direction of the second shaft 342 and the third shaft 343 is referred to as the Y axis, the prism mover 334 is a second axis perpendicular to the Y axis, for example, in the X axis direction. As is rotated, OIS can be implemented.

For example, the second magnet 322M2 and the third magnet 322M3 disposed on the prism mover 334 are each of the second coil unit 323C2 and the third coil unit 323C3 disposed on the housing 310 By forming electromagnetic force, the prism unit 330 may be tilted or rotated in the X-axis direction.

When the second shaft 342 and the third shaft 343 are rotated or tilted in the X-axis direction of the prism unit 330, the prism unit 330 may function as a rotation axis. When rotated or tilted, the first shaft 341 may function as a starter.

Specifically, referring to FIG. 10C, when the second shaft 342 and the third shaft 343 function as rotational axes in the X-axis direction of the prism unit 330, the prism mover 334 X the prism unit 330 by a second electromagnetic force (F2) between the second magnet (322M2), the third magnet (322M3) and the second coil part (323C2) and the third coil part (323C3) arranged in the housing. OIS may be implemented while rotating the second angle Θ2 in the axial direction (Z1->Z1b). The second angle Θ2 may be ±1° to 1.5°, that is, 2° to 3°.

At this time, when the prism unit 330 is rotated or tilted in the X-axis direction, the first shaft 341 may function as a starter by the third guide recess 334R3.

For example, referring to FIG. 5B, the first shaft 341 on the fourth guide recess 334R4 on the second guide protrusion 334P2 protruding more than the first guide protrusion 334P1 of the prism mover 334 When is arranged, a clearance to be rotated or tilted in the X-axis direction is secured, so that rotation or tilting control in the X-axis direction may be possible.

According to the embodiment, there is a technical effect of providing an ultra-slim, ultra-small camera actuator, and a camera module including the same.

For example, according to an embodiment, by implementing OIS with the prism driving unit 320 and the shaft unit 340 disposed in the housing 310, the size limit of the lens in the lens assembly of the optical system is eliminated, and thus an ultra-slim, ultra-small camera actuator And there is a technical effect that can provide a camera module including the same.

In addition, according to the embodiment, there is a technical effect of providing a camera actuator capable of securing a sufficient amount of light by removing a size limitation of a lens in a lens assembly of an optical system when implementing OIS, and a camera module including the same.

For example, according to the embodiment, by implementing OIS by rotating in the first and second axis directions of the prism unit 230 itself, it is possible to secure sufficient light quantity by solving the size limitation of the lens in the lens assembly of the optical system when implementing OIS. There is a technical effect that can provide a possible camera actuator and a camera module including the same.

In addition, according to an embodiment, the prism unit 330 is rotated to the first axis or the second axis by electromagnetic force between the magnet disposed on the prism mover 334 and the coil unit disposed on the housing. There is a technical effect that can produce the best optical properties by minimizing the occurrence of a decent or tilt phenomenon.

In addition, according to the embodiment, there is a technical effect of providing a camera actuator capable of exhibiting the best optical characteristics by minimizing the occurrence of a decent or a tilt phenomenon when implementing OIS, and a camera module including the same.

For example, according to the embodiment, when the OIS is implemented by controlling the rotation of the prism unit 330 to the first axis or the second axis by providing the prism driving unit 320 stably disposed on the housing 310 There is a technical effect that can produce the best optical properties by minimizing the occurrence of) or tilt.

Further, according to the embodiment, there is a technical effect of providing a camera actuator capable of implementing OIS with low power consumption and a camera module including the same.

For example, according to the embodiment, unlike moving a plurality of conventional solid lenses, the prism drive unit 320 and the shaft unit 340 are provided to control the rotation of the prism unit 330 to the first axis or the second axis. By implementing OIS, there is a technical effect of providing a camera actuator capable of implementing OIS with low power consumption and a camera module including the same.

<First camera actuator 100>

Hereinafter, the first camera actuator 100 will be described.

FIG. 11 is a perspective view of a first camera actuator 100 according to an embodiment, FIG. 12 is a perspective view with some components omitted from the camera actuator according to the embodiment shown in FIG. 11, and FIG. It is an exploded perspective view with some components omitted from the camera actuator according to the example.

Referring to FIG. 11, the first camera actuator 100 according to the embodiment includes a base 20, a circuit board 410 disposed outside the base 20, a fourth driver 142, and a third lens assembly ( 130) may be included.

12 is a perspective view in which the base 20 and the circuit board 410 are omitted from FIG. 11, and referring to FIG. 12, the first camera actuator 100 according to the embodiment includes a first guide part 210 and a second A guide unit 220, a first lens assembly 110, a second lens assembly 120, a third driving unit 141, and a fourth driving unit 142 may be included.

The third driving unit 141 and the fourth driving unit 142 may include a coil or a magnet.

For example, when the third driving unit 141 and the fourth driving unit 142 include a coil, the third driving unit 141 includes a first coil unit 141b and a third yoke 141a. In addition, the fourth driving unit 142 may include a second coil unit 142b and a fourth yoke 142a.

Alternatively, on the contrary, the third driving unit 141 and the fourth driving unit 142 may include a magnet.

In the xyz-axis direction shown in FIG. 13, the z-axis refers to the optical axis direction or a direction parallel thereto, the xz plane refers to the ground, and the x-axis refers to a direction perpendicular to the z-axis in the plane (xz plane), and , The y-axis may mean a direction perpendicular to the ground.

Referring to FIG. 13, the first camera actuator 100 according to the embodiment includes a base 20, a first guide part 210, a second guide part 220, a first lens assembly 110, and a second lens. It may include an assembly 120 and a third lens assembly 130.

For example, the first camera actuator 100 according to the embodiment includes a base 20, a first guide part 210 disposed on one side of the base 20, and a first guide part 210 disposed on the other side of the base 20 A second guide part 220, a first lens assembly 110 corresponding to the first guide part 210, a second lens assembly 120 corresponding to the second guide part 220, The first moving part 117 (refer to FIG. 15A) disposed between the first guide part 210 and the first lens assembly 110, the second guide part 220 and the second lens assembly 120 ) May include a second ball bearing (not shown) disposed between.

Also, the embodiment may include a third lens assembly 130 disposed in front of the first lens assembly 110 in the optical axis direction.

Hereinafter, specific features of the camera device according to the embodiment will be described in detail with reference to the drawings.

<Guide part>

Referring to FIGS. 12 and 13, an exemplary embodiment includes a first guide part 210 disposed adjacent to the first sidewall 21a of the base 20 and the second sidewall of the base 20 ( It may include a second guide portion 220 disposed adjacent to 21b).

The first guide part 210 may be disposed between the first lens assembly 110 and the first sidewall of the base 20.

The second guide part 220 may be disposed between the second lens assembly 120 and the second sidewall 21b of the base 20. The first sidewall 21a and the second sidewall 21b of the base may be disposed to face each other.

According to the embodiment, zooming by reducing frictional resistance by reducing friction torque as the lens assembly is driven in a state in which the first guide part 210 and the second guide part 220 precisely numerically controlled in the base are coupled. During zooming), there are technical effects such as improvement of driving power, reduction of power consumption, and improvement of control characteristics.

Accordingly, according to the embodiment, while minimizing the friction torque during zooming, decent or tilt of the lens, and the phenomenon that the central axis of the lens group and the image sensor are not aligned are prevented. However, there are complex technical effects that can significantly improve the resolution.

In the prior art, when the guide rail is disposed on the base itself, it is difficult to manage dimensions because a gradient occurs according to the injection direction, and when the injection is not properly injected, there is a technical problem in that the driving force increases due to increased friction torque.

On the other hand, according to the embodiment, the guide rail is not disposed on the base itself, but the first guide part 210 and the second guide part 220 that are separately formed and assembled from the base 20 are separately employed. Accordingly, there is a special technical effect that can prevent the occurrence of gradient.

The base 20 may be injected in the Z-axis direction. In the prior art, when the rail is integrally configured with the base, there is a problem that the straight line of the rail is twisted due to the occurrence of a gradient as the rail is ejected 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 significantly prevent the occurrence of a gradient compared to the prior art, so that precise injection is possible, and a gradient occurs due to injection. There is a special technical effect that can prevent it.

In the embodiment, the first guide part 210 and the second guide part 220 may have a shorter injection length than the base 20 by being injected in the X-axis. In this case, the first guide part 210 and the second guide part When the rails 212 and 222 are disposed at 220, it is possible to minimize the occurrence of a gradient during injection, and there is a technical effect that the possibility that the straight line of the rail is twisted is low.

14 is an enlarged perspective view of the first guide part 210 and the second guide part 220 in the camera actuator according to the embodiment.

Referring to FIG. 14, 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 1-1 rail 212a and a 1-2 rail 212b. The first guide part 210 may include a first support part 213 between the first-first rail 212a and the first-second rail 212b.

According to the embodiment, by providing two rails per lens assembly, even if one rail is twisted, there is a technical effect of ensuring accuracy with the other.

In addition, according to the embodiment, by providing two rails per lens assembly, even if there is an issue of the frictional force of the ball described later in any one rail, the technical effect of securing the driving force as the rolling drive proceeds smoothly in the remaining part is obtained. have.

The first rail 212 may be connected from one surface to the other surface of the first guide part 210.

The camera actuator and the camera module including the same according to the embodiment solve the problem of lens decenter or tilt during zooming, so that alignment and spacing between a plurality of lens groups are well aligned There is a technical effect of remarkably improving image quality and resolution by changing the angle of view or preventing the occurrence of out of focus.

For example, according to the embodiment, since the first guide part 210 includes the 1-1 rail 212a and the 1-2 rail 212a, the 1-1 rail 212a and the 1- 2 There is a technical effect of improving alignment accuracy by guiding the first lens assembly 110 by the rail 212a.

In addition, according to the embodiment, by providing two rails per lens assembly, it is possible to secure a wide gap between balls, which will be described later, thereby improving driving power, preventing magnetic field interference, and preventing the lens assembly from being stopped or moving. There is a technical effect that can prevent the tilt from.

In addition, the first guide part 210 may include a first guide protrusion 215 extending in a lateral direction perpendicular to the extending direction of the first rail 212.

A first protrusion 214p may be included on the first guide protrusion 215. For example, the first protrusion 214p may include a 1-1 protrusion 214p1 and a 1-2 protrusion 214p2.

In addition, referring to FIG. 14, in an 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 2-1 rail 222a and a 2-2 rail 222b. The second guide part 220 may include a second support part 223 between the 2-1 rail 222a and the 2-2 rail 222b.

The second rail 222 may be connected from one surface to the other surface of the second guide part 220.

In addition, the second guide part 220 may include a second guide protrusion 225 extending in a lateral direction perpendicular to the extending direction of the second rail 222.

A second protrusion 224p including the 2-1 protrusion 224p1 and the 2-2 protrusion 224p2 may be included on the second guide protrusion 225.

The 1-1 protrusion (214p1) and the 1-2 protrusion (214p2) of the first guide part 210 and the 2-1 protrusion (224p1) and the 2-2 protrusion of the second guide part 220 The 224p2 may be coupled to the third housing 21 of the third lens assembly 130 to be described later.

According to the embodiment, since the first guide part 210 includes the 1-1 rail 212a and the 1-2 rail 212b, the 1-1 rail 212a and the 1-2 rail 212b ) Guides the first lens assembly 110, thereby improving alignment accuracy.

In addition, according to the embodiment, the second guide unit 220 includes the 2-1 rail 222a and the 2-2 rail 222b, so that the 2-1 rail 222a and the 2-2 rail ( As 222b) guides the second lens assembly 120, there is a technical effect of improving alignment accuracy.

Also, by providing two rails per lens assembly, even if one rail is twisted, there is a technical effect of securing accuracy with the other.

In addition, according to the embodiment, by providing two rails per lens assembly, it is possible to secure a wide gap between balls, which will be described later, thereby improving driving power, preventing magnetic field interference, and preventing the lens assembly from being stopped or moving. There is a technical effect that can prevent the tilt from.

In addition, according to the embodiment, by providing two rails per lens assembly, even if there is an issue of the frictional force of the ball described later in any one rail, the technical effect of securing the driving force as the rolling drive proceeds smoothly in the remaining part is obtained. have.

In addition, according to the embodiment, the guide rail is not disposed on the base itself, but the first guide part 210 and the second guide part 220 that are separately formed and assembled from the base 20 are separately employed, thereby generating a gradient according to the injection direction. There is a special technical effect that can prevent it.

In the prior art, when the guide rail is disposed on the base itself, it is difficult to manage dimensions because a gradient occurs according to the injection direction, and when the injection is not properly injected, there is a technical problem in that the driving force increases due to increased friction torque.

Next, FIG. 15A is a perspective view of the first lens assembly 110 in the camera actuator according to the embodiment shown in FIG. 13, and FIG. 15B is a perspective view with some components removed from the first lens assembly 110 shown in FIG. 15A. to be.

Referring to FIG. 13 for a moment, in an embodiment, 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 It may include.

Referring back to FIG. 15A, the first lens assembly 110 includes a first lens barrel 112a in which the first lens 113 is disposed and a first driving unit housing 112b in which the first driving unit 116 is disposed. can do. The first lens barrel 112a and the first driving unit housing 112b may be a first housing, and the first housing may have a barrel or barrel shape. The first driving unit 116 may be a magnet driving unit, but is not limited thereto, and a coil may be disposed in some cases.

In addition, the second lens assembly 120 may include a second lens barrel (not shown) in which a second lens (not shown) is disposed and a second drive unit housing (not shown) in which a second drive unit (not shown) is disposed. have. The second lens barrel (not shown) and the second driving unit housing (not shown) may be a second housing, and the second housing may have a barrel or barrel shape. The second driving unit may be a magnet driving unit, but is not limited thereto, and a coil may be disposed in some cases.

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.

Embodiments can be driven using single or multiple balls. For example, in the embodiment, the first moving part 117 and the second guide part 220 and the second lens assembly disposed between the first guide part 210 and the first lens assembly 110 It may include a second ball bearing (not shown) disposed between the 120.

For example, in the embodiment, the first moving part 117 is formed of a single or a plurality of 1-1 ball bearings 117a and the first driving part housing 112b disposed on the upper side of the first driving part housing 112b. It may include a single or a plurality of 1-2 ball bearings (117b) disposed on the lower side.

In an embodiment, the 1-1 ball bearing 117a of the first moving parts 117 moves along the 1-1 rail 212a which is one of the first rails 212, and the first moving part ( The 1-2 ball bearing 117b of 117 may move along the 1-2 rail 212b which is the other one of the first rail 212.

The camera actuator and the camera module including the same according to the embodiment solve the problem of lens decenter or tilt when zooming, so that the alignment between the plurality of lens groups is well aligned and the angle of view is improved. There is a technical effect of remarkably improving image quality and resolution by preventing changes or out of focus.

For example, according to the embodiment, the first guide portion includes a 1-1 rail and a 1-2 rail, so that the 1-1 rail and the 1-2 rail guide the first lens assembly 110 When the first lens assembly 110 moves, there is a technical effect of increasing the accuracy of aligning the optical axis with the second lens assembly 110.

Referring to FIG. 15B, in an embodiment, the first lens assembly 110 may include a first assembly groove 112b1 in which the first moving part 117 is disposed. The second lens assembly 120 may include a second assembly groove (not shown) in which the second ball is disposed.

There may be a plurality of first assembly grooves 112b1 of the first lens assembly 110. In this case, a distance between the two first assembly grooves 112b1 of the plurality of first assembly grooves 112b1 based on the optical axis direction may be longer than the thickness of the first lens barrel 112a.

In an embodiment, the first assembly groove 112b1 of the first lens assembly 110 may have a V shape. In addition, the second assembly groove (not shown) of the second lens assembly 120 may have a V shape. In addition to the V shape, the first assembly groove 112b1 of the first lens assembly 110 may have a U shape or a shape that contacts the first moving part 117 at two or three points. In addition, the second assembly groove (not shown) of the second lens assembly 120 may have a U shape in addition to a V shape or a shape that contacts the first moving part 117 at two or three points.

Next, FIG. 16 is an exemplary view of driving in a camera actuator according to an embodiment.

Referring to FIG. 16, an interaction in which an electromagnetic force (DEM) is issued between the first driving unit 116 that is a magnet driving unit and the first coil unit 141b in the camera actuator according to the embodiment will be described.

As shown in FIG. 16, in the camera actuator according to the embodiment, the magnetization method of the magnet in the first driving unit 116 may be a vertical magnetization method. For example, in the embodiment, both the N pole 116N and the S pole 116S of the magnet may be magnetized to face the first coil part 141b. Accordingly, the N-pole 116N and S-pole 116S of the magnet may be disposed to correspond to a region in which the current flows in the y-axis direction perpendicular to the ground in the first coil unit 141b.

Referring to FIG. 16, in the embodiment, a magnetic force DM is applied in a direction opposite to the x-axis at the N pole 116N of the first driving unit 116 (the direction of the magnetic force is positive or negative in the illustrated direction). Direction), electromagnetic force (DEM) acts in the z-axis direction according to Fleming's left-hand rule when current DE flows in the y-axis direction in the region of the first coil part 141b corresponding to the N-pole 116N Is done.

In addition, in the embodiment, a magnetic force DM is applied in the x-axis direction from the S pole 116S of the first driving part 116, and y perpendicular to the ground in the first coil part 141b corresponding to the S pole 116S. When the current DE flows in the opposite direction of the axis, the electromagnetic force DEM acts in the z-axis direction according to Fleming's left-hand rule (the direction of the electromagnetic force may be a positive or negative direction in the illustrated direction).

At this time, since the third driving unit 141 including the first coil unit 141b is in a fixed state, the first lens assembly 110, which is a mover in which the first driving unit 116 is disposed, has an electromagnetic force (DEM) according to the current direction. As a result, it may be moved back and forth along the rail of the first guide part 210 in a direction parallel to the direction of the z-axis. The electromagnetic force DEM may be controlled in proportion to the current DE applied to the first coil unit 141b.

Similarly, in the camera actuator according to the embodiment, electromagnetic force (DEM) between the second magnet (not shown) and the second coil unit 142b is generated, so that the second lens assembly 120 is horizontal to the optical axis and the second guide unit 220 ) Can be moved along the rail.

As described above, when implementing AF or Zoom in the prior art, a plurality of lens assemblies are driven by an electromagnetic force between a magnet and a coil. In order to obtain positional information of the lens assembly, a Hall sensor is disposed inside the winding of the coil. The inside of the winding of the coil on which the Hall sensor is disposed may be a hollow of the coil. The Hall sensor may obtain positional information of the lens assembly by detecting a change in magnetic flux of a magnet disposed in the lens assembly. However, when the Hall sensor is located inside the coil, the distance between the Hall sensor and the magnet is determined by the height of the coil.

However, in the prior art, there is a thrust required for the movement of the lens assembly, and the height of the coil needs to be higher than a predetermined height to secure such thrust.

However, when the height of the coil increases in this way, the distance between the Hall sensor and the magnet increases due to the increased coil. As a result, since the magnetic flux of the magnet is blocked, there is a technical contradiction that the sensitivity of the magnetic flux detected by the Hall sensor disposed inside the coil is weakened. On the contrary, when the height of the coil is reduced, the electromagnetic force between the magnet and the coil is weakened, so that there is a problem that the thrust for driving the AF or zoom decreases.

According to the applicant's private internal technology, in order to solve this problem, the optimum point of the sensitivity and thrust of the Hall sensor is set by a coil having an appropriate height. In addition, a decrease in thrust or a decrease in the sensitivity of the hall sensor all cause issues in the precision of camera control, and decent or tilt of the camera module may cause the safety or life of the driver or pedestrian. It can be directly connected to.

Accordingly, one of the technical problems of the embodiment is to provide a camera actuator capable of simultaneously increasing the sensitivity of a Hall sensor while increasing thrust and a camera module including the same.

17 is a cross-sectional view taken along line C1-C2 in the camera actuator according to the embodiment illustrated in FIG. 11.

Referring to FIG. 17, the first camera actuator 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 behind the second lens assembly 120.

As described above, the first camera actuator 100 according to the embodiment may be driven by an electromagnetic force of a predetermined magnet and a coil unit.

For example, referring to FIG. 17, in the camera actuator according to the embodiment, the first lens assembly 110 may include a first driving unit 116 and a third driving unit 141, and the second lens assembly ( 120) may include a second driving unit 126 and a fourth driving unit 142.

The first driving unit 116 and the second driving unit 126 may be magnet driving units, and the third driving unit 141 and the fourth driving unit 142 may be coil driving units, but are not limited thereto.

Hereinafter, the first driving unit 116 and the second driving unit 126 will be described as being a magnet driving unit, and the third driving unit 141 and the fourth driving unit 142 will each be a coil driving unit. .

In the camera actuator according to the embodiment, in the first lens assembly 110, the first driving unit 116 may include a first magnet 116b and a first yoke 116a, and the third driving unit 141 is A first coil part 141b and a third yoke 141a may be included. The third driving part 141 may include a first circuit board 41a between the first coil part 141b and the third yoke 141a.

In addition, the embodiment may include a first spacer 141c disposed on the base 20 and a first position detection sensor 71 disposed on the first spacer 141c. The first spacer 141c may be formed of at least one of polycarbonate (PC), polyethylene terephthalate glycol (PETG), polyethylene (PE), or polypropylene (PP), but is not limited thereto.

The first position detection sensor 71 may be a magnetic sensor. For example, the first position detection sensor 71 may be any one of a solid-state magnetic sensor such as a Hall sensor, a coil-type magnetic sensor, or a resonance-type magnetic sensor, but is not limited thereto.

In addition, in the camera actuator according to the embodiment, the second driving unit 126 in the second lens assembly 120 may include a second magnet 126b and a second yoke 126a, and the fourth driving unit 142 May include a second coil unit 142b and a fourth yoke 142a. The fourth driving part 142 may include a second circuit board 41b between the second coil part 142b and the fourth yoke 142a.

Also, the embodiment may include a second spacer 142c disposed on the base 20 and a second position detection sensor 72 disposed on the second spacer 142c. The second spacer 142c may be formed of at least one of polycarbonate (PC), polyethylene terephthalate glycol (PETG), polyethylene (PE), or polypropylene (PP), but is not limited thereto.

The second position detection sensor 72 may be any one of a coil type magnetic sensor, a solid state magnetic sensor such as a Hall sensor, or a resonance type magnetic sensor, but is not limited thereto.

Hereinafter, technical characteristics of the arrangement structure of the position sensor in the embodiment will be described in detail based on FIGS. 17 and 18A to 18C.

FIG. 18A is an enlarged view of area S shown in FIG. 17, and FIG. 18B is a detailed view of area S shown in FIG. 18A.

First of all, referring to FIGS. 17 and 18A, in an embodiment, a base 20, a first lens assembly 110 disposed in the base 20, and the third driving part which is a coil driving part disposed in the base 20 ( 141), a first spacer 141c disposed on the base 20, and a first position detection sensor 71 disposed on the first spacer 141c.

The third driving part 141 may include a first circuit board 41a disposed between the first coil part 141b and the third yoke 141a.

The first coil part 141b and the first position sensor 71 may be electrically connected to the first circuit board 41a.

Next, referring to FIG. 18B, the first spacer 141c includes a first support part 141c1 and a first stopper 141c3 protruding from the first support part 141c1, and the first position detection sensor ( 71) may be disposed on the first stopper 141c3, and the first stopper 141c3 may be disposed in the hollow of the first coil part 141b that is a coil driving part.

In this case, the embodiment may include a first connection part 141c2 connecting the first stopper 141c3 and the first support part 141c1.

In addition, referring to FIG. 18B, the first circuit board 41a is disposed to be spaced apart from the first substrate region 41a1 disposed on the first spacer 141c and the first substrate region 41a1. A second substrate region 41a3 may be included. The first circuit board 41a may include a 2-2nd substrate region 41a2 connecting the first substrate region 41a1 and the second substrate region 41a3. The first position detection sensor 71 may be disposed on the second substrate region 41a3, and the second substrate region 41a3 may be disposed in the hollow of the first coil part 141b, which is a coil driver.

In addition, referring to FIG. 17, the embodiment includes a base 20, a second lens assembly 120 disposed in the base 20, the fourth driving part 142, which is a coil driving part disposed in the base 20, A second spacer 142c disposed on the base 20 and a second position detection sensor 72 disposed on the second spacer 142c may be included.

In addition, the second spacer 142c may also employ the technical characteristics of the first spacer 141c. For example, referring to FIG. 17, the second spacer 142c includes a second protrusion (not shown) protruding from the second support (not shown), and the second position detection sensor 72 It is disposed on the protrusion, and the second protrusion may be disposed in the hollow of the fourth driving part 142 which is a coil driving part.

The second protrusion may include a second seating portion (not shown), and the second position sensor 72 may be disposed on the second seating portion.

In addition, referring to FIG. 17, the second circuit board 41b includes a third substrate region (not shown) disposed on the second spacer 142c, and a fourth substrate region spaced apart from the third substrate region. It may include a substrate region (not shown). The second circuit board 41b may include a 4-2th substrate region connecting the third substrate region and the fourth substrate region.

The second position detection sensor 72 may be disposed on the 4-2th substrate area, and the 4-2th substrate area may be disposed in the hollow of the fourth driving unit 142 which is a coil driving unit.

Referring back to FIG. 18B, the first lens assembly 110 is applied to the electromagnetic force (DEM) between the first magnet 116b of the first driving unit 116 and the first coil unit 141b of the third driving unit 141. By this, it can be driven in the direction of the optical axis.

At this time, the electromagnetic force DEM is affected by the distance DCM between the first magnet 116b and the first coil unit 141b.

Depending on the distance between the Hall sensor and the magnet, the magnetic flux of the magnet detected by the Hall sensor changes, and the Hall sensor's position detection performance is affected.

For example, FIG. 18C is magnetic flux data according to a separation distance between the magnet and the first position detection sensor 71 in the embodiment and the comparative example.

In the conventional internal technology, the height of the coil portion must be guaranteed to secure thrust, and conventionally, as the Hall sensor is disposed on the PCB at the bottom of the coil portion, the higher the height of the coil portion, the greater the separation distance between the magnet and the Hall sensor, There is a technical limitation in that the first distance DH1 separated between the magnet and the Hall sensor must be secured at least 800 μm.

Accordingly, in the conventional internal technology (comparative example), the magnetic flux of the magnet detected by the Hall sensor was at a level of about 50 (mT).

In addition, in the conventional internal technology, when the height of the coil is increased, the magnetic flux of the magnet that may flow into the Hall sensor disposed in the hollow portion of the coil is partially blocked, so that the sensitivity of the Hall sensor is lowered.

On the other hand, according to the embodiment, the first spacer 141c includes a first stopper 141c3 protruding from the first support part 141c1, and the first position detection sensor 71 is on the first stopper 141c3. As the arrangement, the second distance DH2 between the first magnet 116b and the first position detection sensor 71 is significantly reduced, so that the magnetic flux of the first magnet 116b detected by the first position detection sensor 71 ( Magnet Flux)dl has a remarkably improved technical effect.

For example, according to the embodiment, as the first position detection sensor 71 is disposed on the first stopper 141c3, the second distance DH2 between the first magnet 116b and the first position detection sensor 71 is determined. It is possible to secure the magnetic flux between the first magnet 116b and the first position detection sensor 71 to about 150 (mT) compared to the comparative example compared to the comparative example. It has a unique technical effect that can be secured about three times higher than that.

In addition, according to the embodiment, as the first position detection sensor 71 is disposed on the first stopper 141c3, the first position detection sensor 71 may be disposed in the hollow of the first coil unit 141b. Since it is almost exposed to the magnet 116b, there is a special technical effect that the magnetic flux blocking by the first coil unit 141b is significantly reduced.

Accordingly, the camera actuator and the camera module including the same according to the embodiment have a unique technical effect that can simultaneously increase the sensitivity of the Hall sensor while increasing thrust.

Next, one of the technical problems of the embodiment is a camera actuator capable of preventing 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 implementing AF or Zoom, and includes the same. It is to provide a camera module that can be used.

In addition, one of the technical problems of the embodiment is to provide a camera actuator capable of preventing the detachment of a magnet and a yoke, and a camera module including the same.

Hereinafter, a structure for preventing magnetic interference in an embodiment will be described with reference to FIGS. 19A to 19C.

Next, FIG. 19A is a perspective view of the first driving unit 116 in the camera actuator according to the embodiment.

Referring to FIG. 19A, in an embodiment, the first driving unit 116 includes a first magnet 116b and a first yoke 116a, and the first yoke 116a is a first support unit 116a1, 1 It may include a first side protrusion 116a2 extending from the support part 116a1 to the side of the first magnet 116b.

The first side protrusions 116a2 may be disposed on both side surfaces of the first magnet 116b.

In addition, the first yoke 116a may include a first fixed protrusion 116a3 extending in a direction different from the first side protrusion 116a2, for example, in an opposite direction.

The first fixing protrusion 116a3 may be disposed at an intermediate position of the first support 116a1, but is not limited thereto.

Similarly, in an embodiment, the second driving unit 126 includes a second magnet 126b and a second yoke 126a, and the second yoke 126a is a second support (not shown), and the second support The second magnet 126b may include a second side protrusion extending toward the side (refer to the second yoke 126a structure of FIG. 17 above).

The second side protrusions may be disposed on both side surfaces of the second magnet 126b. In addition, the second yoke 126a may include a second fixing protrusion (not shown) extending in a direction different from the second side protrusion, for example, in the opposite direction. The second fixing protrusion may be disposed at an intermediate position of the second support, but is not limited thereto.

In the prior art, when AF or Zoom is implemented, a plurality of lens assemblies are driven by an electromagnetic force between a magnet and a coil, and there is a problem that magnetic field interference occurs between magnets mounted on each lens assembly. Due to magnetic field interference between these magnets, there is a problem that the thrust force is lowered because AF or zoom cannot be properly driven.

In addition, there is a problem of causing a decent or a tilt phenomenon due to magnetic field interference between magnets.

When there is an issue in the accuracy of camera control due to such magnetic field interference, when the thrust is lowered, or when a decent or tilt phenomenon is caused, the safety or life of a driver or a pedestrian as a user may be directly affected.

For example, FIG. 19B is magnetic flux density distribution data in a comparative example.

The comparative example of FIG. 19B is a structure applied to provide a magnetic flux shielding function by arranging a back yoke for a magnet as a private internal technology of the applicant. Although the magnetic flux shielding performance was improved by the application of the back yoke technology to such a magnet, there was a technical problem as follows.

For example, referring to FIG. 19B, the magnetic flux density data between the magnets mounted on the first lens assembly and the second lens assembly, and magnetic field interference (IF) between the magnets is generated, and also generated in each magnet. As the magnetic flux leaks (LE), there is a problem that a loss of thrust occurs.

In particular, in the case of the currently applied high magnification zoom actuator, there is a problem that not only magnetic field interference occurs between the permanent magnets of the first lens assembly and the second lens assembly, which are moving lenses, but also magnetic field interference (IF) with the magnet of the OIS actuator. have.

Due to this magnetic field interference (IF), there is a problem in that the movement of each group is disturbed, and as a result, the input current is also increased.

According to the embodiment, the yoke to the magnet driving unit of the first lens assembly 110 or the second lens assembly 120 includes a side protrusion extending toward the side of the magnet, so that a plurality of lens assemblies may be provided between the magnet and the coil. When driven by an electromagnetic force, there is a special technical effect that can provide a camera actuator capable of preventing magnetic field interference between magnets mounted on each lens assembly and a camera module including the same.

For example, Fig. 19C is magnetic flux density distribution data in the embodiment.

Referring to FIG. 19C, magnetic flux density data between magnets mounted on the first lens assembly and the second lens assembly according to the embodiment, and the magnet driving unit of the first lens assembly 110 and the second lens assembly 120 Since the yoke includes a side protrusion extending to the side of the magnet, magnetic field interference (IF) between the magnets is prevented, and the precision of camera control is significantly improved.

In addition, according to the embodiment, the yoke to the magnet driving unit of the first lens assembly 110 and the second lens assembly 120 includes a side protrusion extending to the side of the magnet to prevent leakage of magnetic flux generated from the magnet. In addition, as the magnetic flux is concentrated (FC) by arranging the side protrusions in the high magnetic flux density area, the density between the flux line and the coil is increased, thereby increasing the Lorentz force, resulting in remarkable thrust. There is an improved technical effect.

Next, FIG. 20 is an exemplary diagram of an integrated body 315 in a camera module according to another embodiment.

In the camera module according to another embodiment, the first camera actuator 100 may be disposed in the first body region 315a of the integrated body 315, and the second camera actuator 300 may be disposed in the second body region 315b. Can be placed.

Next, FIG. 21 is a mobile terminal 1500 to which a camera module according to an embodiment is applied.

As shown in FIG. 21, 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 rear surface.

The camera module 1000 may include an image capturing function and an auto focus function. For example, the camera module 1000 may include an auto focus function using an image.

The camera module 1000 processes an image frame of a still image or moving picture 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 stored in a memory. A camera (not shown) may also be disposed in front of the mobile terminal body.

For example, the camera module 1000 may include a first camera module 1000A and a second camera module 1000B, and OIS is implemented with an AF or zoom function by the first camera module 1000A. This could be possible.

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 a user's control.

The autofocus device 1510 may include one of a package of a surface light emitting laser device as a light emitting unit.

The auto focus device 1510 may include an auto focus 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 proximity or dark environment of 10m or less. The autofocus device 1510 may include a light emitting unit including a vertical cavity surface emission laser (VCSEL) semiconductor device, and a light receiving unit that converts light energy such as a photodiode into electrical energy.

Next, FIG. 22 is a perspective view of a vehicle 700 to which a camera module according to an embodiment is applied.

For example, FIG. 22 is an external view of a vehicle including a vehicle driving assistance apparatus to which the camera module 1000 according to the embodiment is applied.

Referring to FIG. 22, the vehicle 700 according to the embodiment may include wheels 13FL and 13FR that rotate by a power source, and a predetermined sensor. The sensor may be the camera sensor 2000, but is not limited thereto.

The camera 2000 may be a camera sensor to which the camera module 1000 according to the embodiment is applied.

The vehicle 700 of the embodiment may acquire image information through a camera sensor 2000 that photographs a front image or a surrounding image, and uses the image information to determine a lane identification situation and generate a virtual lane when the vehicle is not identified. can do.

For example, the camera sensor 2000 may acquire a front image by photographing the front of the vehicle 700, and a processor (not shown) may analyze an object included in the front image to obtain image information.

For example, when an object such as a lane, an adjacent vehicle, a driving obstruction, and an indirect road marking is photographed in the image captured by the camera sensor 2000, the processor detects such an object. Thus, it can be included in the image information.

In this case, the processor may further supplement the image information by obtaining distance information from the object detected through the camera sensor 2000. The image information may be information about an object photographed in the image.

The 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 an image sensor (eg, CMOS or CCD). The image processing module may process a still image or moving image acquired through an image sensor, extract necessary information, and transmit the extracted information to the processor.

In this case, the camera sensor 2000 may include a stereo camera to improve measurement accuracy of an object and further secure information such as a distance between the vehicle 700 and the object, but is not limited thereto.

Features, structures, effects, and the like described in the embodiments above are included in at least one embodiment, and are not necessarily limited to only one embodiment. Further, the features, structures, effects, and the like illustrated in each embodiment may be combined or modified for other embodiments by a person having ordinary knowledge in the field to which the embodiments belong. Therefore, contents related to such combinations and modifications should be interpreted as being included in the scope of the embodiments.

Although the embodiments have been described above, these are only examples and are not intended to limit the embodiments, and those of ordinary skill in the field to which the embodiments belong are not departing from the essential characteristics of the embodiments. It will be seen that branch transformation and application are possible. For example, each component specifically shown in the embodiment can be modified and implemented. And differences related to these modifications and applications should be construed as being included in the scope of the embodiments set in the appended claims.

Claims (24)

housing;
A prism unit disposed in the housing;
Includes; a prism driving unit and a shaft unit disposed in the housing and tilting the prism unit in a first axis or a second axis direction,
The shaft unit,
A first shaft disposed in a direction parallel to the first direction
A camera actuator including a second shaft and a third shaft disposed in a direction perpendicular to the first direction. The method of claim 1,
The prism unit
A prism mover having a seating portion,
Camera actuator comprising a prism disposed on the seating portion of the prism mover. The method of claim 2,
The prism mover is
It includes a first outer surface and a second outer surface extending upward from both corners of the seating portion,
The first outer surface of the prism mover includes a first recess, and the second outer surface includes a second recess. The method of claim 3,
The second shaft and the third shaft
Camera actuators respectively disposed in the first recess and the second recess. The method of claim 4,
A camera actuator in which diameters of the first and second recesses of the prism mover are larger than the diameters of the second shaft and the third shaft, respectively. The method of claim 5,
The prism mover is
And a third outer surface between the first outer surface and the second outer surface,
A camera actuator including a rotation guide area on the third outer surface. The method of claim 6,
The rotation guide area is
A camera actuator including a first guide protrusion protruding from the third outer surface and a second guide protrusion protruding from the first guide protrusion. The method of claim 7,
The first guide protrusion includes a third guide recess,
The camera actuator of the second guide protrusion includes a fourth guide recess. The method of claim 8,
A camera actuator in which the first shaft of the shaft unit is disposed in a fourth guide recess on the second guide protrusion. The method of claim 9,
The second guide protrusion protrudes higher than the first guide protrusion,
A camera actuator in which the first shaft is disposed on the fourth guide recess on the second guide protrusion. The method of claim 10,
When the prism unit is rotated or tilted in a first axis direction using the first shaft as a rotation axis, the second shaft and the third shaft function as a starter. The method of claim 10,
The camera actuator rotates or tilts in a second axial direction by arranging the first shaft on a fourth guide recess on a second guide protrusion that protrudes more than the first guide protrusion. The method of claim 12,
When the prism unit is rotated or tilted in a second axis direction using the second shaft and the third shaft as rotation axes, the first shaft functions as a starter by the third guide recess. The method of claim 6,
The third outer surface of the prism mover is
It includes a 3-1 seating part, a 3-2 seating part,
A camera actuator in which a fourth magnet and a first magnet are respectively disposed on the 3-1 mounting portion and the 3-2 mounting portion.
housing;
A prism unit disposed in the housing;
A driving unit for tilting the prism unit; And
Including first to third shafts,
The housing includes a housing base, a first sidewall, a second sidewall opposite the first sidewall, and a third sidewall disposed between the first sidewall and the second sidewall,
The housing base includes a first recess protruding from the housing base in a region close to the first sidewall and a second recess protruding from the housing base in a region close to the second sidewall,
The second shaft is disposed in the first recess, the third shaft is disposed in the second recess, and
The first shaft is a camera actuator disposed in a third recess formed in the first sidewall and a fourth recess formed in the second sidewall. The method of claim 15,
A camera actuator in which a direction of a major axis of the second shaft and the third shaft is perpendicular to a direction of a major axis of the first shaft. The method of claim 15,
The prism unit includes a prism mover having a seating portion, and a prism disposed on the seating portion of the prism mover,
The prism mover is
And a third outer surface between the first outer surface and the second outer surface,
A camera actuator including a rotation guide area on the third outer surface. The method of claim 17,
The rotation guide area is
A camera actuator including a first guide protrusion protruding from the third outer surface and a second guide protrusion protruding from the first guide protrusion. The method of claim 18,
The first guide protrusion includes a third guide recess,
The second guide protrusion includes a fourth guide recess,
A camera actuator in which the first shaft of the shaft unit is disposed in a fourth guide recess on the second guide protrusion. The method of claim 19,
The second guide protrusion protrudes higher than the first guide protrusion,
A camera actuator in which the first shaft is disposed on the fourth guide recess on the second guide protrusion. The method of claim 20,
When the prism unit is rotated or tilted in a first axis direction using the first shaft as a rotation axis, the second shaft and the third shaft function as a starter. The method of claim 20,
The camera actuator rotates or tilts in a second axial direction by arranging the first shaft on a fourth guide recess on a second guide protrusion that protrudes more than the first guide protrusion. The method of claim 20,
When the prism unit is rotated or tilted in a second axis direction using the second shaft and the third shaft as rotation axes, the first shaft functions as a starter by the third guide recess. Clause 1 A camera module comprising any one of the camera actuators of claim 23.

Images