Camera actuator and camera module including the same

Abstract

A camera actuator according to an embodiment includes: a housing; a prism unit disposed within the housing; and a first drive unit configured to tilt the prism unit. The prism unit includes: a prism; a prism mover surrounding the prism; and a second drive unit disposed between the prism and the prism mover for tilting the prism. The second drive unit may have a smaller drive displacement than the first drive unit.

Description

Technical Field

[0001] Embodiments relate to a camera actuator and a camera module. Background Art

[0002] Camera modules capture a subject and store it as an image or video, and are installed in various devices such as mobile terminals such as mobile phones, laptops, drones, and vehicles.

[0003] Typically, these devices are equipped with a miniature camera module, and the camera module can perform an autofocus (AF) function, which automatically adjusts the distance between the image sensor and the lens to align the focal length of the lens. In addition, the camera module can perform a zoom function, which increases or decreases the magnification of distant subjects through a zoom lens, thereby performing a zoom function.

[0004] Meanwhile, a zoom actuator is used for a zoom function in a camera module. However, friction torque is generated when the lens moves due to mechanical movement of the actuator, and problems such as reduced driving force, increased power consumption, and reduced control characteristics occur due to the friction torque.

[0005] In particular, to derive optical properties, not only the alignment between the multiple lens groups but also the alignment between the multiple lens groups and the image sensor must be well matched. However, when the center of the spherical surface between the lens groups deviates from the optical axis or tilts (a phenomenon known as lens skew, or a phenomenon in which the central axes of the lens groups and the image sensor are misaligned), there is a problem of image quality or resolution degradation due to changes in viewing angle or loss of focus.

[0006] In addition, when increasing the separation distance in the friction-generating area to reduce the friction torque resistance when moving the lens for the zoom function in the camera module, there is a technical problem in that the lens decentering or lens tilt deepens when zooming or reversing the zoom movement.

[0007] Additionally, recent camera modules employ image stabilization (IS) technology to correct or prevent image shaking due to unstable fixtures or camera movement caused by user movement.

[0008] Such image stabilization (IS) technologies include 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, while image stabilization technology using an image sensor is a technology that compensates for motion mechanically and electronically. Recently, OIS technology has been increasingly adopted.

[0009] Meanwhile, the camera module may include a reflective member, a driving unit, and the like, which may change the path of light to implement the OIS function. The reflective member may be tilted by a driving force applied from the driving unit, and the path of light may be changed during the process. For example, when the camera module detects a hand-shaking vibration waveform generated by a user, the reflective member may be tilted to compensate for the hand-shaking vibration waveform. However, there is a problem in that a relatively small vibration waveform is generated, or a deviation occurs between the hand-shaking vibration waveform caused by problems such as noise and synchronization of components and the waveform that compensates for the hand-shaking vibration waveform. However, when a relatively small vibration waveform occurs or problems such as noise and synchronization of components occur, there is a problem in that there is a deviation between the hand-shaking vibration waveform caused by such problems and the waveform that compensates for it. In this case, the optical characteristics of the camera module may deteriorate, and there is a problem in that the effect of the OIS function is negligible.

[0010] Therefore, a new camera module that can solve the above problems is needed. Summary of the Invention

[0011] Technical issues

[0012] Embodiments provide a camera actuator and a camera module having improved optical properties.

[0013] In addition, the embodiments provide a camera actuator and a camera module capable of effectively controlling vibrations generated by hand shaking.

[0014] Additionally, embodiments provide a camera actuator and a camera module having improved autofocus and high magnification zoom functions.

[0015] In addition, the embodiment provides a camera actuator and a camera module capable of preventing problems such as decentering, tilting, and friction that occur when a lens group moves.

[0016] Technical Solution

[0017] A camera actuator according to an embodiment may include: a housing; a prism unit disposed in the housing; and a first driving unit for tilting the prism unit; wherein the prism unit includes: a prism; and a prism mover disposed to surround the prism; and a second driving unit disposed between the prism and the prism mover and tilting the prism, and wherein a driving displacement of the second driving unit may be smaller than a driving displacement of the first driving unit.

[0018] Additionally, the second driving unit includes a plurality of piezoelectric devices, wherein the prism mover includes an inner surface facing one side surface of the prism and tilted at a predetermined angle, and wherein the plurality of piezoelectric devices may be disposed on the inner surface of the prism mover.

[0019] In addition, the first driving unit includes a plurality of sub-driving units, the plurality of sub-driving units including coil units and magnets, wherein the plurality of sub-driving units include: a first sub-driving unit facing a first outer surface of the prism mover; a second sub-driving unit facing a second outer surface of the prism mover; and a third sub-driving unit facing a lower surface of the prism mover, wherein the first sub-driving unit and the second sub-driving unit face each other in a first direction, and wherein the third sub-driving unit may face the prism unit in a second direction perpendicular to the first direction.

[0020] In addition, the first driving unit may be configured to rotate the prism unit in the second direction about a virtual first line formed by the first sub driving unit and the second sub driving unit in the first direction as an axis.

[0021] In addition, the first driving unit may be configured to rotate the prism unit in the first direction about a virtual second line formed by the third sub driving unit and the fourth sub driving unit in the second direction as an axis.

[0022] In addition, the plurality of piezoelectric devices may include first and second piezoelectric devices spaced apart from each other in the second direction, and third and fourth piezoelectric devices spaced apart from each other in the first direction.

[0023] Additionally, the prism may be configured to be rotationally movable in the second direction by at least one of the first piezoelectric device and the second piezoelectric device on the prism mover.

[0024] In addition, the prism may be configured to be rotationally movable in the first direction by at least one of the third piezoelectric device and the fourth piezoelectric device on the prism mover.

[0025] In addition, the second driving unit includes: a circuit board disposed on an inner surface of the prism mover; and a base layer disposed on the circuit board and including a plurality of openings, and wherein the plurality of piezoelectric devices may be respectively disposed in the plurality of openings.

[0026] Additionally, the base layer may comprise an elastically deformable material.

[0027] Additionally, the thickness of the plurality of piezoelectric devices may be greater than or equal to the thickness of the base layer.

[0028] In addition, the camera module according to the embodiment includes a first camera actuator and a second camera actuator, wherein the first camera actuator performs an auto focus or zoom function, the second camera actuator performs an OIS (Optical Image Stabilizer) function, and wherein the first camera actuator may include a camera actuator.

[0029] In addition, light incident on the camera module from the outside may be incident on the first camera actuator through the second camera actuator.

[0030] Beneficial effects

[0031] The camera actuator and camera module according to the present embodiment can effectively control vibrations caused by hand shake. In detail, the embodiment may include a first drive unit that is capable of tilting the prism unit toward the first axis or the second axis. In addition, the embodiment further includes a second drive unit that is used to drive with a drive displacement smaller than the drive displacement of the first drive unit, wherein the second drive unit can tilt the prism provided on the prism unit toward the first axis or the second axis. In this case, the second drive unit can be driven with a drive displacement corresponding to the deviation that occurs between the hand shake vibration and the drive of the first drive unit. That is, the second drive unit can be driven with a drive displacement corresponding to the deviation caused by the noise and synchronization of the first drive unit, and thus it is possible to effectively control the vibration caused by hand shake, and thus have improved optical properties.

[0032] Furthermore, camera actuators and camera modules according to embodiments can have improved optical properties. Specifically, in the camera actuators and camera modules according to embodiments, the drive unit for moving the lens group includes a piezoelectric device, allowing for more precise control of the lens group. Furthermore, the camera actuators and camera modules according to embodiments can minimize friction generated when moving the lens group. Consequently, embodiments can provide improved autofocus and zoom functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a perspective view of a camera module according to an embodiment.

[0034] Figure 2 is a perspective view in which some components are omitted from a camera module according to an embodiment.

[0035] Figure 3 is an exploded perspective view of a first camera actuator according to an embodiment.

[0036] Figure 4 is a view of a first driving unit of a first camera actuator according to an embodiment.

[0037] Figure 5is a view of a first housing of a first camera actuator according to an embodiment.

[0038] Figure 6 and Figure 7 is a view of a prism unit of a first camera actuator according to an embodiment.

[0039] Figure 8 2 is an exemplary view illustrating an operation of a first driving unit in a first camera actuator according to an embodiment.

[0040] Figures 9 to 11 is a view of a second driving unit of a first camera actuator according to an embodiment.

[0041] Figure 12 2 is an exemplary view illustrating an operation of a second driving unit in a first camera actuator according to an embodiment.

[0042] Figure 13 is a graph illustrating an OIS implementation according to a first driving unit and a second driving unit in a first camera actuator according to an embodiment.

[0043] Figure 14 is an exploded perspective view of a second camera actuator according to an embodiment.

[0044] Figure 15 is a cross-sectional view of a second camera actuator according to an embodiment.

[0045] Figure 16 is a front view of a second camera actuator according to an embodiment.

[0046] Figure 17 is a perspective view illustrating a third driving unit and a fourth driving unit provided in a housing of a second camera actuator according to an embodiment.

[0047] Figure 18 is an exploded perspective view of a third driving unit according to the embodiment.

[0048] Figure 19 is an exploded perspective view of a fourth driving unit according to the embodiment.

[0049] Figure 20 is a perspective view of a partial configuration of a second camera actuator according to the embodiment.

[0050] Figure 21 is a perspective view of a mobile terminal to which a camera module according to an embodiment is applied.

[0051] Figure 22 is a perspective view of a vehicle to which a camera module according to an embodiment is applied. DETAILED DESCRIPTION

[0052] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0053] However, the spirit and scope of the present invention are not limited to parts of the embodiments and can be implemented in various other forms, and one or more elements of the embodiments may be selectively combined and substituted for use within the spirit and scope of the present invention.

[0054] In addition, unless otherwise explicitly defined and described, the terms (including technical and scientific terms) used in the embodiments of the present invention may be interpreted as having the same meaning as that commonly understood by those skilled in the art to which the present invention belongs, and terms such as those defined in commonly used dictionaries may be interpreted as having meanings consistent with their meanings in the relevant technical context.

[0055] In addition, the terms used in the embodiments of the present invention are used to describe the embodiments and are not intended to limit the present invention. In this specification, a singular form may also include a plural form unless otherwise specified in a phrase, and when described in "at least one (or more) of A (and) B and C", at least one of all combinations that can be combined in A, B and C may be included.

[0056] In addition, when describing the elements of the embodiments of the present invention, terms such as first, second, A, B, (a) and (b) may be used. These terms are only used to distinguish an element from other elements, and the terms are not limited to the nature, order or sequence of the elements. In addition, when an element is described as being "connected", "coupled" or "connected" to another element, not only when the element is directly "connected", "coupled" or "connected" to the other element, but also when the element is "connected", "coupled" or "connected" through another element between the element and the other element.

[0057] In addition, when described as being formed or provided “on (above)” or “below (below)” each element, “on (above)” or “below (below)” may include not only when two elements are directly connected to each other, but also when one or more other elements are formed or provided between the two elements. Furthermore, when expressed as “on (above)” or “below (below)”, not only an upper direction based on one element but also a lower direction may be included.

[0058] An optical axis direction used below may be defined as an optical axis direction of a lens coupled to a camera actuator and a camera module, and a vertical direction may be defined as a direction perpendicular to the optical axis.

[0059] The auto focus function used below may be defined as a function of automatically focusing on a subject by adjusting the distance to the image sensor by moving the lens in the optical axis direction according to the distance of the subject so that a clear image of the subject can be obtained by the image sensor.

[0060] Meanwhile, autofocus may correspond to automatic focus (AF). In addition, closed-loop autofocus (CLAF) control may be defined as real-time feedback control of the lens position to improve focus adjustment accuracy by sensing the distance between the image sensor and the lens.

[0061] In addition, before describing the embodiments of the present invention, the first direction may refer to the x-axis direction shown in the accompanying drawings, and the second direction may be a direction different from the first direction. For example, the second direction may refer to the y-axis direction shown in the accompanying drawings, which is perpendicular to the first direction. In addition, the third direction may be different from the first and second directions. For example, the third direction may refer to the z-axis direction shown in the accompanying drawings, which is perpendicular to the first and second directions. Here, the third direction may refer to the optical axis direction.

[0062] The configuration of the camera module according to the present embodiment will be described below with reference to the accompanying drawings.

[0063] Figure 1 is a perspective view of a camera module according to an embodiment, and Figure 2 is a perspective view in which some components are omitted from a camera module according to an embodiment.

[0064] refer to Figure 1 and Figure 2 The camera module 10 according to the embodiment may include one or more camera actuators. For example, the camera module 10 may include a first camera actuator 1000 and a second camera actuator 2000, and may include a cover case 15 for protecting the first camera actuator 1000 and the second camera actuator 2000.

[0065] The first camera actuator 1000 may be an optical image stabilizer (OIS) actuator. In this case, light incident on the camera module 10 from the outside may be preferentially incident on the first camera actuator 1000. In addition, the light incident on the first camera actuator 1000 may be incident on the second camera actuator 2000 by changing the path of the light, and the light passing through the second camera actuator 2000 may be incident on the image sensor 2900.

[0066] The second camera actuator 2000 may be a zoom and / or autofocus actuator. The second camera actuator 2000 may include a plurality of lenses. The second camera actuator 2000 may perform a zoom or autofocus function by moving at least one lens in the optical axis direction according to a control signal from the controller.

[0067] Figure 3 is an exploded perspective view of a first camera actuator according to an embodiment, and Figure 4: is a view of a first driving unit of a first camera actuator according to an embodiment. In addition, Figure 5 is a view of a first housing of a first camera actuator according to an embodiment, and Figure 6 and Figure 7 is a view of a prism unit of a first camera actuator according to an embodiment.

[0068] Will refer to Figures 3 to 7 The first camera actuator 1000 according to an embodiment is described in more detail.

[0069] refer to Figure 3 , the first camera actuator 1000 may include a cover member 100 , a first housing 200 , a first driving unit 300 , a prism unit 400 , and a second driving unit 500 .

[0070] The cover member 100 may include a storage space therein, and at least one side surface may be open. For example, the cover member 100 may have a structure in which a plurality of side surfaces connected to each other are open. Specifically, the cover member 100 may have a structure in which a front surface through which light from the outside is incident, a lower surface corresponding to the first camera actuator 1000 and a rear surface opposite the front surface, and a light movement path of the prism unit 400 are provided, as will be described below.

[0071] The cover member 100 may be made of a rigid material. For example, the cover member 100 may be made of a material such as resin, metal, or ceramic, and may support the first housing 200 disposed in the accommodation space. For example, the cover member 100 is disposed to surround the first housing 200, the first driving unit 300, the prism unit 400, and the like, and may support these components.

[0072] refer to Figure 4 , the first driving unit 300 may include a first circuit board 310 , a coil unit 330 , and a magnet 350 .

[0073] The first circuit board 310 may be connected to a power source (not shown) to apply power to the coil unit 330. The first circuit board 310 may include a circuit board having an electrically connectable wiring pattern, such as a rigid printed circuit board (rigid PCB), a flexible printed circuit board (flex PCB), and a rigid flexible printed circuit board (rigid flex PCB).

[0074] The coil unit 330 may be electrically connected to the first circuit board 310. The coil unit 330 may include one or more coil units. For example, the coil unit 330 may include a first coil unit 331, a second coil unit 332, and a third coil unit 333.

[0075] The first to third coil units 331, 332, and 333 may be spaced apart from each other. For example, the first circuit board 310 may have a 'C' shape, and the first coil unit 331 and the second coil unit 332 may be respectively disposed on the first and second surfaces of the first circuit board 310 facing each other. In addition, the third coil unit 333 may be disposed on a third surface connecting the first and second surfaces of the first circuit board 310.

[0076] The magnet 350 may include one or more magnets. For example, the magnet 350 may include a first magnet 351, a second magnet 352, and a third magnet 353 disposed in an area corresponding to the coil unit 330. Specifically, the first magnet 351 may be disposed on the first surface of the first circuit board 310. Specifically, the first magnet 351 may be disposed in an area corresponding to the first coil unit 331. Furthermore, the second magnet 352 may be disposed on the second surface of the first circuit board 310. The second magnet 352 may be disposed in an area corresponding to the second coil unit 332. Furthermore, the third magnet 353 may be disposed on the third surface of the first circuit board 310. The third magnet 353 may be disposed in an area corresponding to the third coil unit 333.

[0077] The first drive unit 300 may further include a sensing unit. For example, the first drive unit 300 may further include a Hall sensor and a gyro sensor (not shown). The Hall sensor may include a first Hall sensor HS1 disposed adjacent to a coil unit selected from the first coil unit 331 and the second coil unit 332. The first Hall sensor HS1 may detect the position of the first magnet 351. In addition, the Hall sensor may include a second Hall sensor HS2 disposed adjacent to the third coil unit 333. The second Hall sensor HS2 may detect the position of the third magnet 353.

[0078] The first driving unit 300 may tilt the prism unit 400. In detail, the first driving unit 300 may control the tilt of the prism unit 400 along the first axis or the second axis by applying power.

[0079] refer to Figure 5 The first housing 200 may include a receiving space for receiving the prism unit 400. The first housing 200 may include a plurality of inner surfaces. For example, the first housing 200 may have a first inner surface 200S1 corresponding to the first surface of the first circuit board 310, a second inner surface 200S2 corresponding to the second surface of the first circuit board 310, and a third inner surface 200S3 corresponding to the third surface of the first circuit board 310.

[0080] In detail, first housing 200 may include a first inner surface 200S1 corresponding to first coil unit 331 and a second inner surface 200S2 corresponding to second coil unit 332. First inner surface 200S1 and second inner surface 200S2 may be disposed to face each other in a first direction (x-axis direction).

[0081] In addition, the first housing 200 may further include a third inner surface 200S3 and a fourth inner surface 200S4. The third inner surface 200S3 may be arranged in the region corresponding to the third coil unit 333. The third inner surface 200S3 may be arranged between the first inner surface 200S1 and the second inner surface 200S2 to connect the two inner surfaces. The third inner surface 200S3 may have a shape extending in the first direction (x-axis direction). The fourth inner surface 200S4 may be arranged between the first inner surface 200S1 and the second inner surface 200S2 and may be connected to the third inner surface 200S3. The fourth inner surface 200S4 may have a shape extending in the second direction (y-axis direction).

[0082] The first housing 200 may include a plurality of housing holes 210. The housing holes 210 may be through-holes extending through the outer and inner surfaces of the first housing 200. The plurality of housing holes 210 may include a first housing hole 211, a second housing hole 212, and a third housing hole 213. The first housing hole 211 may be a through-hole extending through the outer surface corresponding to the first inner surface 200S1. The second housing hole 212 may be a through-hole extending through the outer surface corresponding to the second inner surface 200S2. The third housing hole 213 may be a through-hole extending through the outer surface corresponding to the third inner surface 200S3.

[0083] The first housing hole 211 may be provided in a region corresponding to the first coil unit 331. In addition, the first housing hole 211 may have a size and shape corresponding to the size and shape of the first coil unit 331. Thus, the first coil unit 331 may be provided by being partially or entirely inserted into the first housing hole 211.

[0084] The second housing hole 212 may be provided in an area corresponding to the second coil unit 332. In addition, the second housing hole 212 may have a size and shape corresponding to the size and shape of the second coil unit 332. Thus, the second coil unit 332 may be provided by being partially or fully inserted into the second housing hole 212.

[0085] The third housing hole 213 may be provided in an area corresponding to the third coil unit 333. In addition, the third housing hole 213 may have a size and shape corresponding to the size and shape of the third coil unit 333. Thus, the third coil unit 333 may be provided by being partially or fully inserted into the third housing hole 213.

[0086] refer to Figure 6 and Figure 7 , the prism unit 400 may be disposed in the first housing 200. In detail, the prism unit 400 may be disposed in the accommodation space of the first housing 200.

[0087] The prism unit 400 may include a prism 410 and a prism mover 430 disposed on the prism 410 .

[0088] The prism 410 may be a right-angle prism. The prism 410 may reflect the direction of light incident from the outside. That is, the prism 410 may change the path of light incident from the outside to the first camera actuator 1000 toward the first camera actuator 1000.

[0089] The prism mover 430 may be disposed on the prism 410. The prism mover 430 may be disposed so as to surround the prism 410. At least one side of the prism mover 430 may be open and may include a storage space therein. Specifically, the prism mover 430 may have a structure in which a plurality of outer surfaces connected to each other are open. For example, the prism mover 430 may have a structure in which the outer surfaces corresponding to the prism 410 are open and may include a storage space defined as a first space 435 therein. The first space 435 may have a shape corresponding to the prism 410. The first space 435 may have a larger volume than the prism 410. Thus, the first space 435 may provide a space in which the prism 410 can be tilted.

[0090] The prism mover 430 may include an inner surface 435S. The inner surface 435S may be an inner surface constituting the first space 2435. The inner surface 435S may be a surface facing one side surface of the prism 410. The inner surface 435S may be spaced apart from one side surface of the prism 410. For example, when the tilt control of the prism 410 is not controlled by the second driving unit 500, one side surface of the prism 410 may be spaced apart from the inner surface 435S.

[0091] The prism mover 430 may include a step 436. The step 436 may be disposed in the first space 435. The step 436 may serve as a guide and / or a base portion for the prism 410. For example, a protrusion corresponding to the step 436 may be formed on the outer side of the prism 410. Thus, when the prism 410 is disposed on the prism mover 430, the protrusion of the prism 410 may be guided by the step 436 of the prism mover 430 to be disposed in the first space 435. In other words, the prism mover 430 may arrange the prism 410 at a position set by the step 436 and effectively support the prism 410.

[0092] In addition, the prism mover 430 can perform a stopper function for the prism 410. For example, the prism 410 can be set to be tiltable in the first and / or second axis directions on the prism mover 430 by the second driving unit 500 to be described later. In this case, the step 436 and the inner surface 435S of the prism unit 400 can provide a stopper function when controlling the tilt of the prism 410.

[0093] For example, when prism 410 is tilted along a first axis on prism unit 400, inner surface 435S can prevent prism 410 from tilting beyond a threshold value. Additionally, when prism 410 is tilted along a second axis on prism unit 400, step 436 can prevent prism 410 from tilting beyond a threshold value. Thus, prism 410 can have improved alignment and optical properties on prism mover 430, and can have improved reliability.

[0094] The prism unit 400 may include multiple outer surfaces. For example, the prism mover 430 may include multiple outer surfaces. The prism mover 430 may include a first outer surface 430s1 corresponding to the first inner surface 200S1 of the first housing 200, a second outer surface 430S2 corresponding to the second inner surface 200S2, a third outer surface 430S3 corresponding to the third inner surface 200S3, and a fourth outer surface 430S4 corresponding to the fourth inner surface 200S4. Here, the third outer surface 430S3 may be the bottom surface of the prism mover 430.

[0095] Furthermore, the prism mover 430 may include multiple recesses. The recesses may be concave in the direction of the first space 435 on the outer surface of the prism mover 430. The multiple recesses may include a first recess 433R1, a second recess 433R2, and a third recess 433R3. For example, the first recess 433R1 may be provided on the first outer surface 430S1. The first recess 433R1 may be provided in an area corresponding to the first housing hole 211. The second recess 433R2 may be provided on the second outer surface 430S2. The second recess 433R2 may be provided in an area corresponding to the second housing hole 212. The third recess 433R3 may be provided on the third outer surface 430S3. The third recess 433R3 may be provided in an area corresponding to the third housing hole 213. In other words, the first housing hole 211 may correspond to the first coil unit 331, and the second housing hole 212 may correspond to the second coil unit 332. In addition, the third housing hole 213 may correspond to the third coil unit 333 .

[0096] The magnets 350 may be disposed in recesses. For example, the first magnet 351 is disposed in the first recess 433R1, the second magnet 352 is disposed in the second recess 433R2, and the third magnet 353 is disposed in the first recess 433R1, and the magnets may be spaced apart from each other.

[0097] Figure 8 2 is an exemplary view illustrating an operation of a first driving unit in a first camera actuator according to an embodiment.

[0098] refer to Figure 8 The prism unit 400 can be tilted toward the first axis or the second axis by the first driving unit 300. Here, the first axis tilt may mean tilting in the up-down direction (y-axis direction; second direction) with the x-axis direction shown in the drawings as the rotation axis, and the second axis tilt may mean tilting in the left-right direction (x-axis direction; first direction) with the y-axis direction shown in the drawings as the rotation axis.

[0099] The first drive unit 300 may include a plurality of sub-drive units, each including a coil unit 330 and a magnet 350. For example, the first drive unit 300 includes a first sub-drive unit including a first coil unit 331 and a first magnet 351; a second sub-drive unit including a second coil unit 332 and a second magnet 352; and a third sub-drive unit including a third coil unit 333 and a second magnet 353. The first sub-drive unit may be positioned to face the first outer surface 430S1, the second sub-drive unit may be positioned to face the second outer surface 430S2, and the third sub-drive unit may be positioned to face the third outer surface 430S3. The first sub-drive unit may be positioned to face the second sub-drive unit in a first direction (x-axis direction). The third sub-drive unit may be positioned to face the prism unit 400 in a second direction (y-axis direction).

[0100] The prism unit 400 can be tilted along a first axis. In detail, the first driving unit 300 can be configured to enable the prism unit 400 to rotate around a first virtual line L1 as an axis, and the first virtual line L1 is formed by the first magnet 351, the first coil unit 331, the second magnet 352, and the second coil unit 332. Here, the first line L1 can be a line extending in a first direction (x-axis direction). The first line L1 can overlap with the center of the prism 410 in the first direction.

[0101] That is, the third sub-driving unit can rotate and move the prism unit 400 in the up-down direction (y-axis direction) about the first line L1 as an axis.

[0102] For example, a repulsive force may be generated between the third coil unit 333 and the third-first magnet of the third magnet 353, and an attractive force may be generated between the third coil unit 333 and the third-second magnet of the third magnet 353. Here, the third-first magnet and the third-second magnet may face each other in the third direction (z-axis direction). In this case, the prism unit 400 may be tilted in the upward direction (reference direction) by the generated electromagnetic force. Figure 8 ).

[0103] In addition, an attractive force may be generated between the third coil unit 333 and the third-first magnet of the third magnet 353, and a repulsive force may be generated between the third coil unit 333 and the third-second magnet of the third magnet 353. In this case, the prism unit 400 may be tilted in the downward direction by the generated electromagnetic force (refer to FIG. Figure 8 ).

[0104] The prism unit 400 can be tilted along the second axis. In detail, the first drive unit 300 can be configured so that the prism unit 400 can rotate around a second virtual line L2 as an axis, and the second virtual line L2 is formed by the third magnet 353 and the third coil unit 333. Here, the second line L2 can be a line extending in the second direction (y-axis direction). The second line L2 of the prism 410 can overlap with the center of the prism 410 in the second direction.

[0105] That is, the first and second sub driving units can rotate and move the prism unit 400 in the left-right direction (x-axis direction) about the second line L2 as an axis.

[0106] For example, a repulsive force may be generated between the first coil unit 331 and the first-first magnet of the first magnet 351, and an attractive force may be generated between the first coil unit 331 and the first-second magnet of the first magnet 351. In addition, an attractive force may be generated between the second coil unit 332 and the second-first magnet of the second magnet 352, and a repulsive force may be generated between the second coil unit 332 and the second-second magnet of the second magnet 352. Here, the first-first magnet and the second-second magnet may face each other in the first direction, and the first-second magnet and the second-second magnet may face each other in the first direction. In this case, the prism unit 400 may be tilted in the left direction by the generated electromagnetic force (refer to Figure 8 ).

[0107] In addition, an attractive force may be generated between the first coil unit 331 and the first-first magnet of the first magnet 351, and a repulsive force may be generated between the first coil unit 331 and the first-second magnet of the first magnet 351. In addition, a repulsive force may be generated between the second coil unit 332 and the second-first magnet of the second magnet 352, and an attractive force may be generated between the second coil unit 332 and the second-second magnet of the second magnet 352. In this case, the prism unit 400 may be tilted in the right direction (refer to FIG. 1 ) by the generated electromagnetic force. Figure 8 ).

[0108] That is, the first camera actuator 1000 according to the embodiment includes a VCM (voice coil motor) type first driving unit 300, and the optical image stabilizer (OIS) can be implemented by controlling the movement path of the incident light to the first axis and / or the second axis by the first driving unit 300. In this case, the first camera actuator 1000 can have improved optical characteristics by minimizing the occurrence of decentering and tilt phenomena when implementing OIS. However, the embodiment is not limited thereto, and the first driving unit 300 may include a piezoelectric device, for example, a piezoelectric device or a shape memory alloy. In this case, the first driving unit 300 can tilt the prism unit 400 using the physical change of the piezoelectric device or the shape memory alloy, and can control the movement path of the incident light.

[0109] Figures 9 to 11 is a view of a second driving unit of a first camera actuator according to an embodiment.

[0110] refer to Figures 9 to 11 , the first camera actuator 1000 according to an embodiment may include a second driving unit 500. The second driving unit 500 may be provided on the prism unit 400. For example, the second driving unit 500 may be provided on the prism mover 430. The second driving unit 500 may be provided between the prism 410 and the prism mover 430. In detail, the second driving unit 500 may be provided on the inner surface 435S of the prism mover 430. That is, the second driving unit 500 may be provided to face one side surface of the prism 410 on the inner surface 435S tilted at a predetermined angle. The tilt angle of the inner surface 435S may correspond to the tilt angle of the one side surface of the prism 410.

[0111] The second driving unit 500 may include a second circuit board 510 , a base layer 520 , and a piezoelectric device 530 .

[0112] The second circuit board 510 may be disposed on the inner surface 435S of the prism mover 430. The planar area of ​​the second circuit board 510 may be smaller than the planar area of ​​the inner surface 435s. Power may be applied to the plurality of piezoelectric devices 530. The second circuit board 510 may include a circuit board having an electrically connectable wiring pattern, such as a rigid printed circuit board (rigid PCB), a flexible printed circuit board (flex PCB), and a rigid flexible printed circuit board (rigid flex PCB).

[0113] The base layer 520 may be disposed on the inner surface 435S of the prism mover 430. The base layer 520 may be disposed on the second circuit board 510. The base layer 520 may be disposed in direct contact with the upper surface of the second circuit board 510. The base layer 520 may have a predetermined thickness and may include a soft and elastic material. For example, the base layer 520 may include at least one of silicone, thermoplastic resin, thermoplastic silicone resin, thermoplastic elastomer, polyurethane elastomer, ethylene vinyl acetate (EVA), a harmless plasticizer, and polyvinyl chloride (PVC) with a stabilizer added. The base layer 520 may be elastically deformed by the prism 410. For example, the prism 410 may be tilted by the piezoelectric device 530 described below. During this process, the prism 410 may press a portion of the base layer 520, and the portion of the base layer 520 may be elastically deformed by the pressure. In addition, when the driving force is removed from the prism 410 to return to its original position, the portion of the base layer 520 may be elastically restored.

[0114] The base layer 520 may include an opening. The opening may be a through hole extending through the upper and lower surfaces of the base layer 520. Here, the upper surface of the base layer 520 may be a surface facing one side surface of the prism 410, and the lower surface of the base layer 520 may be a surface facing the second circuit board 510. The opening may expose the upper surface of the second circuit board 510.

[0115] A plurality of openings may be provided on the base layer 520. In detail, the plurality of openings may correspond to the plurality of piezoelectric devices 530 described below. The plurality of openings may be spaced apart from each other. For example, the plurality of openings may include a first opening 521 and a second opening 522 spaced apart from each other in the second direction. In addition, the plurality of openings may include a third opening 523 and a fourth opening 524 spaced apart from each other in the first direction. The third opening 523 and the fourth opening 524 may be provided in the region between the first opening 521 and the second opening 522.

[0116] The piezoelectric device 530 may be provided on the inner surface 435S of the prism mover 430. The piezoelectric device 530 may be provided on the second circuit board 510. The piezoelectric device 530 may be electrically connected to the second circuit board 510. In addition, the piezoelectric device 530 may be provided in direct or indirect contact with the prism 410. For example, the prism 410 may be physically coupled by an adhesive member (not shown) provided between the upper surface of the piezoelectric device 530 and one side surface of the prism 410.

[0117] The piezoelectric device 530 may include a material that undergoes mechanical deformation by applied electrical power. The piezoelectric device 530 may include a piezoelectric device. The piezoelectric device 530 may include a ceramic material. For example, the piezoelectric device 530 may include at least one of ZnO, AlN, LiNbO4, lead antimony stannate, lead magnesium tantalate, lead nickel tantalate, titanate, tungstate, zirconate, or lead zirconate titanate [Pb(ZrxTi1-x)O3(PZT)], lead lanthanum zirconate (PLZT), lead niobate (PNZT), BaTiO3, SrTiO3, lead magnesium niobate, lead nickel niobate, lead manganese niobate, lead zinc niobate, lead, barium and bismuth, and niobates including lead titanate and strontium.

[0118] A plurality of piezoelectric devices 530 may be disposed on the second circuit board 510. The plurality of piezoelectric devices 530 may be disposed in openings of the base layer 520, respectively. For example, the plurality of piezoelectric devices 530 may include a first piezoelectric device 531, a second piezoelectric device 532, a third piezoelectric device 533, and a fourth piezoelectric device 534, which are spaced apart from each other. The first piezoelectric device 531 may be disposed in the first opening 521 of the base layer 520. Furthermore, the second piezoelectric device 532 may be disposed in the second opening 522 of the base layer 520. Furthermore, the third piezoelectric device 533 may be disposed in the third opening 523 of the base layer 520. Furthermore, the fourth piezoelectric device 534 may be disposed in the fourth opening 524 of the base layer 520.

[0119] That is, the first piezoelectric device 531 and the second piezoelectric device 532 may be arranged to be spaced apart from each other in the second direction. In addition, the third piezoelectric device 533 and the fourth piezoelectric device 534 may be arranged to be spaced apart from each other in the first direction. The third piezoelectric device 533 and the fourth piezoelectric device 534 may be arranged in the region between the first piezoelectric device 531 and the second piezoelectric device 532.

[0120] The first piezoelectric device 531 may have the same shape and height as the second piezoelectric device 532. In addition, the third piezoelectric device 533 may have the same shape and height as the fourth piezoelectric device 534. In addition, the first to fourth piezoelectric devices 531, 532, 533, and 534 may have the same height.

[0121] The first to fourth piezoelectric devices 531, 532, 533, and 534 may have a planar shape corresponding to each of the first to fourth openings 521, 522, 523, and 524. In addition, the first to fourth piezoelectric devices 531, 532, 533, and 534 may have a width corresponding to each of the first to fourth openings 521, 522, 523, and 524.

[0122] In addition, the first to fourth piezoelectric devices 531, 532, 533, and 534 may have a thickness greater than or equal to the depth of each of the first to fourth openings 521, 522, 523, and 524. That is, the first to fourth piezoelectric devices 531, 532, 533, and 534 may be thicker than the base layer 520 or have the same thickness as the base layer 520.

[0123] For example, when the thicknesses of the first to fourth piezoelectric devices 531, 532, 533, and 534 are the same as the depths of the first to fourth openings 521, 522, 523, and 524, the upper surfaces of the first to fourth piezoelectric devices 531, 532, 533, and 534 may be disposed on the same plane as the upper surface of the base layer 520, as shown in FIG. Figure 10 Thus, when no driving force is applied to the prism 410 , the upper surface of the base layer 520 and the piezoelectric device 530 may be disposed in contact with one side surface of the prism 410 .

[0124] In addition, when the thickness of the first to fourth piezoelectric devices 531, 532, 533, and 534 is greater than the depth of the first to fourth openings 521, 522, 523, and 524, the upper surfaces of the first to fourth piezoelectric devices 531, 532, 533, and 534 may be disposed above the upper surface of the base layer 520. Thus, when no driving force is applied to the prism 410, the piezoelectric device 530 may be disposed in contact with one side surface of the prism 410 and may be spaced apart from the upper surface of the base layer 520 by a predetermined distance.

[0125] Figure 12 2 is an exemplary view illustrating an operation of a second driving unit in a first camera actuator according to an embodiment.

[0126] refer to Figure 12 The piezoelectric device 530 can be mechanically deformed by the applied power. Specifically, the piezoelectric device 530 can expand or contract when a set power is applied. For example, the piezoelectric device 530 can expand toward one side surface of the prism 410 or contract in the opposite direction. The piezoelectric device 530 can expand or contract in the direction of the optical axis.

[0127] In this process, the piezoelectric device 530 of the second driving unit 500 may tilt the prism 410. In detail, the piezoelectric device 530 may control the tilt of the prism 410 on the first axis or the second axis by applying power.

[0128] For example, the prism 410 can be tilted along a first axis on the prism mover 430. The prism 410 can be tilted in the up and down directions (refer to Figure 12The prism 410 may be rotated in the up-down direction (y-axis direction) by at least one of the first piezoelectric device 531 and the second piezoelectric device 532 .

[0129] In detail, the first piezoelectric device 531 can be expanded by applying power. In addition, the second piezoelectric device 532 can be contracted by applying power or maintain a set shape due to no power being applied. Thus, the prism 410 can be moved in the downward direction (refer to FIG. 1 ) by the mechanical deformation of the piezoelectric device 530. Figure 12 ) is tilted about the first line L1 as an axis. Here, since no power is applied to the third piezoelectric device 533 and the fourth piezoelectric device 534, deformation may not occur. Alternatively, the third piezoelectric device 533 and the fourth piezoelectric device 534 may be deformed by a predetermined power to provide a driving force for tilting the prism 410 in the downward direction.

[0130] Furthermore, the second piezoelectric device 532 can be expanded by applying power. In addition, the first piezoelectric device 531 can be contracted by applying power, or can maintain a set shape due to no power being applied. Thus, the prism 410 can be moved in an upward direction (refer to FIG. 1 ) by mechanical deformation of the piezoelectric device 530. Figure 12 ) is tilted about the first line L1 as an axis. Here, since no power is applied to the third piezoelectric device 533 and the fourth piezoelectric device 534, deformation may not occur. Alternatively, the third piezoelectric device 533 and the fourth piezoelectric device 534 may be deformed by a predetermined power to provide a driving force for tilting the prism 410 in the upward direction.

[0131] The prism 410 can be tilted along the second axis on the prism mover 430. The prism 410 can be tilted in the left and right directions (refer to Figure 12 ) is rotated and moved about the second line L2 as an axis. The prism 410 can be rotated in the left-right direction (x direction) by at least one of the third piezoelectric device 533 and the fourth piezoelectric device 534.

[0132] In detail, the third piezoelectric device 533 can be expanded by applying power. In addition, the fourth piezoelectric device 534 can be contracted by applying power or maintain a set shape because no power is applied. Thus, the prism 410 can be deformed in the right direction (refer to FIG. 1 ) by the mechanical deformation of the piezoelectric device 530. Figure 12 ) is tilted about the second line L2 as an axis. Here, since no power is applied to the first piezoelectric device 531 and the second piezoelectric device 532, deformation may not occur. Alternatively, the first piezoelectric device 531 and the second piezoelectric device 532 may be deformed by a predetermined power to provide a driving force for tilting the prism 410 in the right direction.

[0133] In addition, the fourth piezoelectric device 534 can be expanded by applying power. In addition, the third piezoelectric device 533 can be contracted by applying power or maintain a set shape because no power is applied. Thus, the prism 410 can be moved in the left direction (reference direction) by the mechanical deformation of the piezoelectric device 530. Figure 12 ) is tilted about the second line L2 as an axis. Here, since no power is applied to the first piezoelectric device 531 and the second piezoelectric device 532, deformation may not occur. Alternatively, the first piezoelectric device 531 and the second piezoelectric device 532 may be deformed by a predetermined power to provide a driving force for tilting the prism 410 in the left direction.

[0134] That is, the first camera actuator 1000 according to the embodiment includes the second driving unit 500, and the prism 410 can be tilted toward the first axis or the second axis by the second driving unit 500. Thus, the second driving unit 500 can minimize deviation generated when OIS is implemented by the first driving unit 300.

[0135] In this case, the driving displacement of the second driving unit 500 may be smaller than the driving displacement of the first driving unit 300. For example, the driving displacement of the second driving unit 500 may be about 30% or less of the driving displacement of the first driving unit 300.

[0136] Specifically, when the drive displacement of the second drive unit 500 exceeds approximately 30% of the drive displacement of the first drive unit 300, the tilt angle of the prism 410 can be relatively large. That is, the range of variation of the prism 410 on the prism mover 430 is relatively large, which may increase the required size of the prism mover 430. Furthermore, when the drive displacement of the second drive unit 500 exceeds approximately 30% of the drive displacement of the first drive unit 300, the coupling force between the prism 410 and the prism mover 430 can be reduced. Therefore, the drive displacement of the second drive unit 500 preferably satisfies the aforementioned range.

[0137] Figure 13 is a graph illustrating an OIS implementation of a first driving unit and a second driving unit in a first camera actuator according to an embodiment. In detail, Figure 13 It is a graph of hand-shake vibration and waveform of the first drive unit and the second drive unit.

[0138] The first camera actuator 1000 may effectively compensate for hand-shake vibration generated by the first driving unit 300 and the second driving unit 500 .

[0139] For example, Figure 13 As shown in FIG, when a waveform is generated due to hand-shaking vibration, the first driving unit 300 may form a compensation waveform ( Figure 13However, if Figure 13 As shown in FIG, a deviation may occur between the hand-shake vibration waveform and the compensation waveform of the first driving unit 300. For example, the deviation may occur due to noise of the first driving unit 300, such as noise of the coil unit 330, noise of the Hall sensors HS1 and HS2, noise of the gyro sensor, drive synchronization of components, etc.

[0140] In this case, the second driving unit 500 may form a correction waveform corresponding to the deviation ( Figure 13 Here, the correction waveform may be a waveform representing the difference between the hand-shake vibration waveform and the compensation waveform for the first drive unit 300. That is, the second drive unit 500 can vary with a smaller driving displacement than the first drive unit 300 in order to compensate for the slightly generated waveform. Thus, the first camera actuator 1000 can adjust the camera's position according to the correction result waveform ( Figure 13 The waveform is obtained by using the master + slave correction result).

[0141] That is, in this embodiment, hand-shake vibration can be more effectively corrected by the second driving unit 500 through a driving displacement corresponding to a deviation between the hand-shake vibration and the first driving unit 300. Thus, the first camera actuator 1000 can have improved optical characteristics when implementing OIS.

[0142] Figure 14 is an exploded perspective view of a second camera actuator according to an embodiment, Figure 15 is a cross-sectional view of a second camera actuator according to an embodiment. In addition, Figure 16 is a front view of a second camera actuator according to an embodiment, and Figure 17 : is a perspective view showing a third driving unit and a fourth driving unit provided in a housing of a second camera actuator according to an embodiment. Figure 18 and Figure 19 is an exploded perspective view of a first drive unit and a second drive unit according to an embodiment, and Figure 20 is a perspective view of a partial configuration of a second camera actuator according to the embodiment.

[0143] refer to Figures 14 to 20 , the second camera actuator 2000 according to the embodiment may include a second housing 2100 , a first lens unit 2105 , a first lens barrel 2200 , a third driving unit 2300 , a second lens barrel 2400 , and a fourth driving unit 2500 .

[0144] The second housing 2100 may form an exterior of the second camera actuator 2000. The second housing 2100 may have opened upper and lower regions and may have a hexahedral shape.

[0145] The second housing 2100 may include an accommodation space therein, and the first lens barrel 2200 , the third driving unit 2300 , the second lens barrel 2400 , and the fourth driving unit 2500 may be accommodated in the accommodation space of the second housing 2100 .

[0146] The second housing 2100 may include a first sub-housing 2110 and a second sub-housing 2120 .

[0147] The first sub-housing 2110 may include a first hole 2111. The first hole 2111 may be formed on one side of the first sub-housing 2110. The first hole 2111 is a hollow hole and may be a hole passing through the outside and inside of the first sub-housing 2110.

[0148] The first sub-housing 2110 may further include a second hole 2112 and a third hole 2113. The second hole 2112 and the third hole 2113 may be provided on one side of the first sub-housing 2110. The second hole 2112 and the third hole 2113 may be hollow holes passing through the exterior and interior of the first sub-housing 2110. The second hole 2112 and the third hole 2113 may be spaced apart from the first hole 2111. In detail, the first hole 2111 may be provided between the second hole 2112 and the third hole 2113. The first hole 2111 may be provided at equal intervals from the second hole 2112 and the third hole 2113.

[0149] The second hole 2112 may include a plurality of protrusions protruding from an inner circumferential surface of the second hole 2112 toward the center of the second hole 2112. For example, the plurality of protrusions may include a first protrusion 2112a provided at an upper end of the second hole 2112 in the optical axis direction and a second protrusion 2112b provided at a lower end of the second hole 2112.

[0150] In detail, the first protrusion 2112a may include a plurality of first sub-protrusions (not shown) spaced apart from each other. The plurality of first sub-protrusions may be arranged at equal intervals from the center of the second hole 2112 along the circumference of a concentric circle shape. In addition, the second protrusion 2112b may be spaced apart from the first protrusion 2112a in the optical axis direction. The second protrusion 2112b may be disposed below the first protrusion 2112a. The second protrusion 2112b may include a plurality of second sub-protrusions (not shown) spaced apart from each other. The plurality of second sub-protrusions may be arranged at equal intervals from the center of the second hole 2112 along the circumference of a concentric circle shape. The first protrusion 2112a and the second protrusion 2112b may provide a space in which a portion of the third drive unit 2300 described below, for example, the first buffer member 2321, is disposed.

[0151] The third hole 2113 may include a plurality of protrusions protruding from an inner circumferential surface of the third hole 2113 toward the center of the third hole 2113. The plurality of protrusions may include a third protrusion 2113a provided at an upper end of the third hole 2113 with respect to the optical axis direction and a fourth protrusion 2113b provided at a lower end of the second hole 2112.

[0152] The third protrusion 2113a may include a plurality of third sub-protrusions (not shown) spaced apart from each other. The plurality of third sub-protrusions may be arranged at equal intervals along the circumference of a concentric circle from the center of the third hole 2113. In addition, the fourth protrusion 2113b may be spaced apart from the third protrusion 2113a in the optical axis direction. The fourth protrusion 2113b may include a plurality of fourth sub-protrusions (not shown) spaced apart from each other. The plurality of fourth sub-protrusions may be arranged at equal intervals along the circumference of a concentric circle from the center of the third hole 2113. The third protrusion 2113a and the fourth protrusion 2113b may provide a space in which a portion of the fourth drive unit 2500 described below, for example, the third buffer member 2521, is disposed.

[0153] The second sub-housing 2120 may be disposed below the first sub-housing 2110. Specifically, the second sub-housing 2120 may be disposed below the first sub-housing 2110 in a third direction (z-axis, optical axis direction). The second sub-housing 2120 may be disposed closer to the image sensor 2900, which will be described below, than the first sub-housing 2110. The first lens barrel 2200, the third driving unit 2300, the second lens barrel 2400, and the fourth driving unit 2500 may be disposed in the second sub-housing 2120.

[0154] The second sub-housing 2120 can be coupled to the first sub-housing 2110. For example, the first sub-housing 2110 and the second sub-housing 2120 can be coupled by a separate fastening member (not shown) such as a bolt. In addition, the first sub-housing 2110 and the second sub-housing 2120 can be coupled to each other by physical coupling of a coupling clamp and a coupling groove formed therein, respectively.

[0155] The first lens unit 2105 may be disposed in the second housing 2100 and may include at least one lens. For example, the first lens unit 2105 may be disposed in the first sub-housing 2110. Specifically, the first lens unit 2105 may be disposed in the first hole 2111 of the first sub-housing 2110. For example, the first lens unit 2105 may be coupled to the first sub-housing 2110 via a screw thread formed on the inner circumferential surface of the first hole 2111.

[0156] The first lens barrel 2200 may be disposed in the second housing 2100. The first lens barrel 2200 may be disposed in the second sub-housing 2120. The first lens barrel 2200 may be disposed below the first lens unit 2105. For example, the first lens barrel 2200 may be disposed below the first lens unit 2105 in the optical axis direction and may be closer to the image sensor 2900 than the first lens unit 2105. The first lens barrel 2200 may be coupled to the third driving unit 2300. The first lens barrel 2200 may be moved in the second housing 2100 by the third driving unit 2300. In detail, the first lens barrel 2200 may be moved in the optical axis direction by the third driving unit 2300.

[0157] The first lens barrel 2200 may include a first barrel portion 2210 , a second lens unit 2205 , a first guide portion 2220 , and a first elastic portion 2230 .

[0158] The first barrel portion 2210 may be provided in an area overlapping with the optical axis and may have an open shape on one surface and the other surface. For example, the first barrel portion 2210 may have a cylindrical shape in which one surface and the other surface are open.

[0159] The first barrel portion 2210 may include a first through hole 2211. The first through hole 2211 may be a through hole that passes through one surface and the other surface of the first barrel portion 2210. Here, one surface of the first barrel portion 2210 may be a surface facing the first lens unit 2105, and the other surface may be a surface opposite to the one surface and facing the image sensor 2900.

[0160] The second lens unit 2205 may be disposed on the first barrel portion 2210. Specifically, the second lens unit 2205 may be disposed in the first through hole 2211. For example, a screw line may be formed on the inner circumferential surface of the first through hole 2211, and the second lens unit 2205 may be coupled to the first barrel portion 2210 through the screw line.

[0161] The second lens unit 2205 may include at least one lens. The second lens unit 2205 may perform a zoom function. The second lens unit 2205 may be movable in the optical axis direction. Specifically, the second lens unit 2205 may be movable in the optical axis direction relative to the first lens unit 2105.

[0162] The first guide portion 2220 may extend outward from the first barrel portion 2210. For example, the first guide portion 2220 may extend from the first barrel portion 2210 in a direction perpendicular to the optical axis, for example, in a first direction (x-axis direction).

[0163] The first guide portion 2220 may include a first upper surface 2221 , a first side surface 2222 , and a first lower surface 2223 .

[0164] The first upper surface 2221 may face the inner upper surface of the second housing 2100. The first upper surface 2221 may face the inner upper surface of the second housing 2100 in the second direction (y-axis direction). The first upper surface 2221 may include a plurality of sub-upper surfaces. In detail, the first upper surface 2221 may include a first sub-upper surface 2221a and a second sub-upper surface 2221b arranged to be lower than the first sub-upper surface 2221a in the second direction (y-axis direction). That is, the second sub-upper surface 2221b may be arranged to be closer to the first lower surface 2223 than the first sub-upper surface 2221a. At least one first fastening protrusion (not shown) may be provided on the second sub-upper surface 2221b. The first fastening protrusion may have a shape that protrudes upward on the second sub-upper surface 2221b. The first fastening protrusion may be inserted into a first fixing groove (not shown) formed in the first elastic portion 2230 to be described below.

[0165] In addition, the first upper surface 2221 may include a first stepped surface 2225 disposed between the first sub-upper surface 2221a and the second sub-upper surface 2221b. The first stepped surface 2225 may connect the ends of the first sub-upper surface 2221a and the second sub-upper surface 2221b. The first stepped surface 2225 may be defined as a first stepped portion 2225. That is, the first upper surface 2221 may include the first sub-upper surface 2221a, the second sub-upper surface 2221b, and the first stepped portion 2225, and may have a stepped structure.

[0166] The first lower surface 2223 may face the inner lower surface of the second housing 2100, which will be described below. A first groove 223h1 may be provided on the first lower surface 2223. The first groove 223h1 may have a concave shape in a direction from the first lower surface 2223 to the first upper surface 2221. A first magnetic scaler 2610, which will be described below, may be provided in the first groove 223h1.

[0167] In addition, a second groove 2223h2 may be provided on the first lower surface 2223. The second groove 2223h2 may be spaced apart from the first groove 223h1. The second groove 2223h2 may be provided in an edge region of the first lower surface 2223. The second groove 2223h2 may provide an area in which a portion of the first elastic portion 2230, which will be described below, is provided. In detail, the second groove 2223h2 may provide an area in which the first elastic portion 2230 is installed and fixed.

[0168] The first side surface 2222 may be provided between the first upper surface 2221 and the first lower surface 2223. In detail, the first side surface 2222 may be a surface connecting the first upper surface 2221 and the first lower surface 2223. In more detail, the first side surface 2222 may be a surface connecting the second sub-upper surface 2221b and the first lower surface 2223. The first side surface 2222 may face the second inner surface of the second sub-housing 2120 to be described below.

[0169] The first recess 2222h may be provided on the first side surface 2222. The first recess 2222h may have a concave shape in the direction from the first side surface 2222 to the first barrel portion 2210. In addition, the first recess 2222h may have a groove shape extending in the optical axis direction (z-axis direction). The first recess 2222h may have a V-shape when viewed from the front.

[0170] The first guide portion 2220 may include a first insertion hole 2220h1. The first insertion hole 2220h1 may be a hole passing through one surface and the other surface of the first guide portion 2220. Here, one surface of the first guide portion 2220 may be a surface facing the first lens unit 2105, and the other surface may be a surface opposite to the one surface and facing the image sensor 2900.

[0171] The first pin 2250 may be disposed in the first insertion hole 2220h1. The first pin 2250 may be disposed to pass through the first insertion hole 2220h1. The first pin 2250 may have a shape extending in the optical axis direction (z-axis direction) and may have a length in the optical axis direction that is longer than the length of the first lens barrel 2200. The first pin 2250 may be coupled to at least one of the first sub-housing 2110 and the second sub-housing 2120. The first lens barrel 2200 may move the first pin 2250 as a moving axis in the optical axis direction. In this way, the second lens unit 2205 disposed in the first lens barrel 2200 may perform a zoom function and / or an autofocus function.

[0172] The first elastic portion 2230 may be disposed on the first guide portion 2220. For example, the first elastic portion 2230 may be disposed on the first upper surface 2221, the first lower surface 2223, and the first side surface 2222 of the first guide portion 2220. The first elastic portion 2230 may be coupled to the first guide portion 2220.

[0173] The first elastic portion 2230 may include a first elastic member 2231 and a second elastic member 2232 .

[0174] The first elastic member 2231 may be coupled to the first guide portion 2220 . The first elastic member 2231 may be disposed at a set position on the first side surface 2222 .

[0175] The first elastic member 2231 may have a shape corresponding to the first side surface 2222. For example, the first elastic member 2231 may include a first region 2231a, a second region 2231b, and a third region 2231c.

[0176] The first region 2231a and the second region 2231b may be provided on the first side surface 2222 of the first guide portion 2220 and may be spaced apart from each other. The first region 2231a and the second region 2231b may be provided on a region of the first side surface 2222 where the first recess 2222h is not provided.

[0177] The third region 2231c may be provided between the first region 2231a and the second region 2231b to connect the two regions 2231a and 2231b. The third region 2231c may be provided in a region corresponding to the first recess 2222h. The third region 2231c may have a V shape corresponding to the first recess 2222h.

[0178] The second elastic member 2232 may be provided on the first guide portion 2220. The second elastic member 2232 may be coupled to the first guide portion 2220.

[0179] The second elastic member 2232 may include a fourth region 2232a, a fifth region 2232b, and a sixth region 2232c.

[0180] The fourth region 2232a may be provided on the first upper surface 2221 of the first guide portion 2220. Specifically, the fourth region 2232a may be provided on the second sub-upper surface 2221b of the first guide portion 2220. The fourth region may include a first fixing groove (not shown). The first fixing groove may be provided in an area corresponding to the first fastening protrusion and may have a shape corresponding to the first fastening protrusion.

[0181] The fifth region 2232b may be connected to the fourth region 2232a. For example, the fifth region 2232b may be bent at one end of the fourth region 2232a and may be disposed on the first side surface 2222 of the first guide portion 2220. The fifth region 2232b may be disposed on the first elastic member 2231. The fifth region 2232b may be parallel to the first region 2231a and the second region 2231b. The fifth region 2232b may be disposed so as to cover the first elastic member 2231.

[0182] The sixth region 2232c may be connected to the fifth region 2232b. For example, the sixth region 2232c may be bent at one end of the fifth region 2232b and may be disposed on the first lower surface 2223 of the first guide portion 2220. A portion of the sixth region 2232c may be inserted into the second groove 2223h2 disposed on the first lower surface 2223.

[0183] That is, the second elastic member 2232 can be physically coupled to the first guide portion 2220 by inserting the sixth region 2232c into the second groove 2223h2 while the first fixing groove formed in the fourth region 2232a engages the first fastening protrusion. Thus, the first elastic portion 2230 can maintain a state of being firmly coupled to the first guide portion 2220.

[0184] In addition, the first lens barrel 2200 may further include a first guide groove 2210h1. The first guide groove 2210h1 may be provided in an area extending outward from the first barrel portion 2210. The first guide groove 2210h1 may be provided in an area corresponding to the second pin 2450, which will be described below. The first guide groove 2210h1 may provide a space into which the second pin 2450 is inserted. The first lens barrel 2200 can be moved in the optical axis direction via the first pin 2250 and the second pin 2450. In this case, the first guide groove 2210h1 may have an open shape on one side. For example, the first guide groove 2210h1 may have an open shape on the side facing the first inner surface of the second housing 2100. Thus, the friction and vibration generated when the first lens barrel 2200 is moved by the third drive unit 2300 can be minimized.

[0185] The second camera actuator 2000 may include a third driving unit 2300. The third driving unit 2300 may be provided in the second housing 2100. The third driving unit 2300 may be coupled to the first lens barrel 2200. The third driving unit 2300 may move the first lens barrel 2200 in the optical axis direction (z-axis direction).

[0186] The third driving unit 2300 may include a first piezoelectric device 2310 , a first extending rod 2320 , a first buffering member 2321 , and a second buffering member 2322 .

[0187] The first piezoelectric device 2310 may include a piezoelectric device. For example, the first piezoelectric device 2310 may include a material that undergoes mechanical deformation by applied power. The first piezoelectric device 2310 may contract or expand by the applied power and may undergo mechanical deformation in a predetermined direction. For example, the first piezoelectric device 2310 may generate vibration while undergoing mechanical deformation in the optical axis direction (z-axis direction) by the applied power.

[0188] The first piezoelectric device 2310 may include a first disk portion 2311 and a first protrusion 2312. The first disk portion 2311 may have a plate shape and may be disposed on the second hole 2112. For example, the first disk portion 2311 may be disposed on the first protrusion 2112a of the second hole 2112. Specifically, the first disk portion 2311 may be disposed on a plurality of first sub-protrusions. The first protrusion 2112a may support the first disk portion 2311.

[0189] The first protrusion 2312 may be disposed below the first disk portion 2311. Specifically, the first protrusion 2312 may be disposed below the first disk portion 2311 in the third direction (z-axis direction) and may be connected to the first disk portion 2311. A portion of the first protrusion 2312 may be disposed in the second hole 2112. The first protrusion 2312 may have a shape that protrudes toward the image sensor 2900. The width (x-axis, y-axis directions) of the first protrusion 2312 may vary toward the optical axis. For example, the width of the first protrusion 2312 may decrease as it approaches the image sensor 2900.

[0190] The first extension rod 2320 can extend in the optical axis direction. The first extension rod 2320 can be arranged parallel to the optical axis and can be connected to the first piezoelectric device 2310. For example, the upper end of the first extension rod 2320 can be connected to the first protrusion 2312. In addition, the lower end of the first extension rod 2320 can be inserted into the lower end of the second housing 2100, for example, into the fourth hole (not shown) formed at the lower end of the second sub-housing 2120.

[0191] In addition, a region of the first extension rod 2320 may be connected to the first lens barrel 2200. For example, the first extension rod 2320 may be connected to the first lens barrel 2200 via the first elastic portion 2230. Specifically, the first extension rod 2320 may be disposed between the first elastic member 2231 and the second elastic member 2232. More specifically, the first extension rod 2320 may be disposed between the third region 2231c of the first elastic member 2231 and the fifth region 2232b of the second elastic member 2232. The first extension rod 2320 may be fixed by the elastic force of the first elastic member 2231 and the second elastic member 2232.

[0192] The first extension rod 2320 can transmit the vibration generated in the first piezoelectric device 2310 to the first lens barrel 2200. The first lens barrel 2200 can move upward or downward (z-axis direction, optical axis direction) according to the vibration direction of the first extension rod 2320. In this way, the second lens unit 2205 in the first lens barrel 2200 can move to perform a zoom function of zooming in or out.

[0193] The first buffer member 2321 may be disposed on the first extension rod 2320. The first buffer member 2321 may be disposed on an upper region of the first extension rod 2320. The first buffer member 2321 may be disposed in the second hole 2112 of the second housing 2100. For example, the first buffer member 2321 may be disposed between the first protrusion 2112a and the second protrusion 2112b of the second hole 2112. The first buffer member 2321 may be fixed at a position defined by the first protrusion 2112a and the second protrusion 2112b. Alternatively, the first buffer member 2321 may include a through hole into which the first extension rod 2320 is inserted.

[0194] The second buffer member 2322 may be disposed on the first extension rod 2320. The second buffer member 2322 may be disposed on a lower region of the first extension rod 2320. The second buffer member 2322 may be spaced apart from the first buffer member 2321 in the optical axis direction. The second buffer member 2322 may be disposed in a fourth hole (not shown) of the second housing 2100. The second buffer member 2322 may be configured to be inserted into the fourth hole. The second buffer member 2322 may include a through hole into which the first extension rod 2320 is inserted.

[0195] The first and second buffer members 2321 and 2322 may prevent noise caused by vibration of the first extension rod 2320. In addition, the first and second buffer members 2321 and 2322 may prevent the first extension rod 2320 from being deformed or damaged due to external impact.

[0196] The second lens barrel 2400 may be disposed in the second housing 2100. The second lens barrel 2400 may be disposed in the second sub-housing 2120. The second lens barrel 2400 may be disposed below the first lens barrel 2200. For example, the second lens barrel 2400 may be disposed below the first lens barrel 2200 in the optical axis direction and may be closer to the image sensor 2900 than the first lens barrel 2200. The second lens barrel 2400 may be coupled to the fourth driving unit 2500. The second lens barrel 2400 may be moved in the second housing 2100 by the fourth driving unit 2500. In detail, the second lens barrel 2400 may be moved in the optical axis direction by the fourth driving unit 2500.

[0197] The second lens barrel 2400 may include a second barrel portion 2410 , a third lens unit 2405 , a second guide portion 2420 , and a second elastic portion 2430 .

[0198] The second barrel portion 2410 may be provided in an area overlapping with the optical axis and may have an open shape on one surface and the other surface. For example, the second barrel portion 2410 may have a cylindrical shape with one surface and the other surface being open.

[0199] The second barrel portion 2410 may include a second through hole 2411. The second through hole 2411 may be a through hole that passes through one surface and the other surface of the second barrel portion 2410. Here, one surface of the second barrel portion 2410 may be a surface facing the first lens barrel 2200, and the other surface may be a surface opposite to the one surface and facing the image sensor 2900.

[0200] The third lens unit 2405 may be disposed on the second barrel portion 2410. Specifically, the third lens unit 2405 may be disposed in the second through hole 2411. For example, a thread may be formed on the inner circumferential surface of the second through hole 2411, and the third lens unit 2405 may be coupled to the second barrel portion 2410 via the thread.

[0201] The third lens unit 2405 may include at least one lens. The third lens unit 2405 may perform an autofocus function. The third lens unit 2405 may be movable along the optical axis. Specifically, the third lens unit 2405 may be movable along the optical axis relative to the first lens unit 2105. The third lens unit 2405 may be movable separately from the second lens unit 2205. Furthermore, the distance that the third lens unit 2405 can move along the optical axis may be the same as or different from that of the second lens unit 2205.

[0202] The second guide portion 2420 can extend outward from the second lens barrel portion 2410. For example, the second guide portion 2420 can extend from the second lens barrel portion 2410 in a direction perpendicular to the optical axis, for example, in the first direction (x-axis direction). In this case, the second guide portion 2420 can extend in a direction opposite to the first guide portion 2220. For example, the first guide portion 2220 can extend from the first lens barrel portion 2210 in the +x-axis direction, and the second guide portion 2420 can extend from the second lens barrel portion 2410 in the -x-axis direction.

[0203] The second guide portion 2420 may include a second lower surface 2421 , a second side surface 2422 , and a second upper surface 2423 .

[0204] The second upper surface 2423 may face the inner upper surface of the second housing 2100. The second upper surface 2423 may face the inner upper surface of the second housing 2100 in the second direction (y-axis direction). A third groove 2423h1 may be provided on the second upper surface 2423. The third groove 2423h1 may have a concave shape in a direction from the second upper surface 2423 to the second lower surface 2421. The second magnetic scaler 2620, which will be described below, may be provided in the third groove 2423h1.

[0205] In addition, a fourth groove 2423h2 may be provided on the second upper surface 2423. The fourth groove 2423h2 may be spaced apart from the third groove 2423h1. The fourth groove 2423h2 may be provided in an edge region of the second upper surface 2423. The fourth groove 2423h2 may provide an area in which a portion of the second elastic portion 2430, which will be described below, is provided. In detail, the fourth groove 2423h2 may provide an area in which the second elastic portion 2430 is installed and fixed.

[0206] The second lower surface 2421 may face the inner lower surface of the second housing 2100. The second lower surface 2421 may face the inner lower surface of the second housing 2100 in the second direction (y-axis direction). The second lower surface 2421 may include a plurality of sub-lower surfaces. In detail, the second lower surface 2421 may include a first sub-lower surface 2421a and a second sub-lower surface 2421b arranged above the first sub-lower surface 2421a in the second direction (y-axis direction). That is, the second sub-lower surface 2421b may be arranged closer to the second upper surface 2423 than the first sub-lower surface 2421a. At least one second fastening protrusion (not shown) may be provided on the second sub-lower surface 2421b. The second fastening protrusion may have a shape protruding downward from the second sub-lower surface 2421b. The second fastening protrusion may be inserted into a second fixing groove (not shown) formed in the second elastic portion 2430 to be described below.

[0207] In addition, the second lower surface 2421 may include a second stepped surface 2425 disposed between the first sub-lower surface 2421a and the second sub-lower surface 2421b. The second stepped surface 2425 may be connected to the lower ends of the first sub-lower surface 2421a and the second sub-lower surface 2421b. The second stepped surface 2425 may be defined as a second stepped portion 2425. That is, the second lower surface 2421 may include the first sub-lower surface 2421a, the second sub-lower surface 2421b, and the second stepped portion 2425, and may have a stepped structure.

[0208] The second side surface 2422 may be disposed between the second upper surface 2423 and the second lower surface 2421. In detail, the second side surface 2422 may be a surface connecting the second upper surface 2423 and the second lower surface 2421. In more detail, the second side surface 2422 may be a surface connecting the second sub-lower surface 2421b and the second upper surface 2423. The second side surface 2422 may face the first inner surface of the second sub-housing 2120, which will be described below.

[0209] The second recess 2422h may be provided on the second side surface 2422. The second recess 2422h may have a concave shape from the second side surface 2422 toward the second barrel portion 2410. In addition, the second recess 2422h may have a groove shape extending in the optical axis direction (z-axis direction). The second recess 2422h may have a V-shape when viewed from the front.

[0210] The second guide portion 2420 may include a second insertion hole 2420h1. The second insertion hole 2420h1 may be a hole passing through one surface and the other surface of the second guide portion 2420. Here, one surface of the second guide portion 2420 may be a surface facing the first lens barrel 2200, and the other surface may be a surface opposite to the one surface and facing the image sensor 2900.

[0211] The second pin 2450 may be disposed in the second insertion hole 2420h1. The second pin 2450 may be disposed to pass through the second insertion hole 2420h1. The second pin 2450 may have a shape extending in the optical axis direction (z-axis direction). The second pin 2450 may be spaced apart from the first pin 2250 and may be parallel to the first pin 2250. The second pin 2450 may have a length in the optical axis direction that is longer than the length of the second lens barrel 2400. The second pin 2450 may be coupled to at least one of the first sub-housing 2110 and the second sub-housing 2120. The second lens barrel 2400 may move the second pin 2450 as a moving axis in the optical axis direction. In this way, the third lens unit 2405 disposed in the second lens barrel 2400 may perform a zoom function and / or an autofocus function.

[0212] The second elastic portion 2430 may be disposed on the second guide portion 2420. For example, the second elastic portion 2430 may be disposed on the second upper surface 2423, the second lower surface 2421, and the second side surface 2422 of the second guide portion 2420. The second elastic portion 2430 may be coupled to the second guide portion 2420.

[0213] The second elastic portion 2430 may include a third elastic member 2431 and a fourth elastic member 2432 .

[0214] The third elastic member 2431 may be coupled to the second guide portion 2420 . The third elastic member 2431 may be disposed at a set position on the second side surface 2422 .

[0215] The third elastic member 2431 may have a shape corresponding to the second side surface 2422. For example, the third elastic member 2431 may include a seventh region 2431a, an eighth region 2431b, and a ninth region 2431c.

[0216] The seventh and eighth regions 2431a and 2431b may be disposed on the second side surface 2422 of the second guide portion 2420 and may be spaced apart from each other. The seventh and eighth regions 2431a and 2431b may be disposed in a region of the second side surface 2422 where the second recess 2422h is not disposed.

[0217] The ninth region 2431c may be provided between the first region 2231a and the second region 2231b to connect the two regions 2431a and 2431b. The ninth region 2431c may be provided in a region corresponding to the second recess 2422h. The ninth region 2431c may have a V shape corresponding to the second recess 2422h.

[0218] The fourth elastic member 2432 may be provided on the second guide portion 2420. The fourth elastic member 2432 may be coupled to the second guide portion 2420.

[0219] The fourth elastic member 2432 may include a tenth region 2432a, an eleventh region 2432b, and a twelfth region 2432c.

[0220] The tenth region 2432a may be provided on the second lower surface 2421 of the second guide portion 2420. Specifically, the tenth region 2432a may be provided on the second sub-lower surface 2421b of the second guide portion 2420. The tenth region 2431a may include a second fixing groove (not shown). The second fixing groove may be provided in an area corresponding to the second fastening protrusion and may have a shape corresponding to the second fastening protrusion.

[0221] The eleventh region 2432b may be connected to the tenth region 2432a. For example, the eleventh region 2432b may be bent at one end of the tenth region 2432a and may be disposed on the second side surface 2422 of the second guide portion 2420. The eleventh region 2432b may be disposed on the third elastic member 2431. The eleventh region 2432b may be parallel to the seventh region 2431a and the eighth region 2431b. The eleventh region 2432b may be disposed to cover the third elastic member 2431.

[0222] The twelfth region 2432c may be connected to the eleventh region 2432b. For example, the twelfth region 2432c may be bent at one end of the eleventh region 2432b and may be disposed on the second upper surface 2423 of the second guide portion 2420. A portion of the twelfth region 2432c may be inserted into the fourth groove 2423h2 disposed on the second upper surface 2423.

[0223] That is, the fourth elastic member 243 can be physically coupled to the second guide portion 2420 by inserting the twelfth region 2432c into the fourth groove 2423h2 while the second fixing groove formed in the seventh region 2431a engages the second fastening protrusion. Thus, the second elastic portion 2430 can maintain a state of being firmly coupled to the second guide portion 2420.

[0224] In addition, the second lens barrel 2400 may further include a second guide groove 2410h1. The second guide groove 2410h1 may be provided in an area extending outward from the second barrel portion 2410. The second guide groove 2410h1 may be provided in an area corresponding to the first pin 2250. The second guide groove 2410h1 may provide a space into which the first pin 2250 is inserted. The second lens barrel 2400 can be moved in the optical axis direction via the first pin 2250 and the second pin 2450. In this case, the second guide groove 2410h1 may have an open shape on one side. For example, the second guide groove 2410h1 may have an open shape on the side facing the second inner surface of the second housing 2100. Thus, the friction and vibration generated when the second lens barrel 2400 is moved by the fourth drive unit 2500 can be minimized.

[0225] The second camera actuator 2000 may include a fourth driving unit 2500. The fourth driving unit 2500 may be provided in the second housing 2100. The fourth driving unit 2500 may be coupled to the second lens barrel 2400. The fourth driving unit 2500 may move the second lens barrel 2400 in the optical axis direction (z-axis direction).

[0226] The fourth driving unit 2500 may include a second piezoelectric device 2510 , a second extending portion 2520 , a third buffering member 2521 , and a fourth buffering member 2522 .

[0227] The second piezoelectric device 2510 may include a piezoelectric device. For example, the second piezoelectric device 2510 may include a material that undergoes mechanical deformation when an applied electric force is applied. The second piezoelectric device 2510 may contract or expand when an applied electric force is applied, and may undergo mechanical deformation in a predetermined direction. For example, the second piezoelectric device 2510 may generate vibration while undergoing mechanical deformation in the optical axis direction (z-axis direction) when an applied electric force is applied.

[0228] The second piezoelectric device 2510 may include a second disk portion 2511 and a second protrusion 2512. The second disk portion 2511 has a plate shape and may be disposed on the third hole 2113. For example, the second disk portion 2511 may be disposed on the third protrusion 2113a of the third hole 2113. Specifically, the second disk portion 2511 may be disposed on a plurality of third sub-protrusions. The third protrusion 2113a may support the second disk portion 2511.

[0229] The second protrusion 2512 may be disposed below the second disk portion 2511. Specifically, the second protrusion 2512 may be disposed below the second disk portion 2511 in the third direction (z-axis direction) and may be connected to the second disk portion 2511. A portion of the second protrusion 2512 may be disposed in the third hole 2113. The second protrusion 2512 may have a shape that protrudes toward the image sensor 2900. The width (x-axis, y-axis directions) of the second protrusion 2512 may vary toward the optical axis. For example, the width of the second protrusion 2512 may decrease as it approaches the image sensor 2900.

[0230] The second extension portion 2520 may extend in the direction of the optical axis. The second extension portion 2520 may be arranged parallel to the optical axis and may be connected to the second piezoelectric device 2510. For example, the upper end of the second extension portion 2520 may be connected to the second protrusion 2512. In addition, the lower end of the second extension portion 2520 may be inserted into the lower end of the second housing 2100, for example, into a fifth hole (not shown) formed at the lower end of the second sub-housing 2120.

[0231] In addition, a region of the second extension portion 2520 may be connected to the second lens barrel 2400. For example, the second extension portion 2520 may be connected to the second lens barrel 2400 via the second elastic portion 2430. Specifically, the second extension portion 2520 may be disposed between the third elastic member 2431 and the fourth elastic member 2432. More specifically, the second extension portion 2520 may be disposed between the ninth region 2431c of the third elastic member 2431 and the eleventh region 2432b of the fourth elastic member 2432. The second extension portion 2520 may be fixed by the elastic force of the third elastic member 2431 and the fourth elastic member 2432.

[0232] The second extending portion 2520 can transmit the vibration generated in the second piezoelectric device 2510 to the second lens barrel 2400. The second lens barrel 2400 can move upward or downward (z-axis direction, optical axis direction) according to the vibration direction of the second extending portion 2520. In this way, the third lens unit 2405 in the second lens barrel 2400 can move to perform a zoom function of zooming in or out.

[0233] The third cushioning member 2521 may be disposed on the second extension portion 2520. The third cushioning member 2521 may be disposed on the upper region of the second extension portion 2520. The third cushioning member 2521 may be disposed in the third hole 2113 of the second housing 2100. For example, the third cushioning member 2521 may be disposed between the third protrusion 2113a and the fourth protrusion 2113b of the third hole 2113. The third cushioning member 2521 may be fixed to a position defined by the third protrusion 2113a and the fourth protrusion 2113b. Alternatively, the third cushioning member 2521 may include a through hole into which the second extension portion 2520 is inserted.

[0234] The fourth buffer member 2522 may be disposed on the second extension portion 2520. The fourth buffer member 2522 may be disposed on a lower region of the second extension portion 2520. The fourth buffer member 2522 may be spaced apart from the third buffer member 2521 in the optical axis direction. The fourth buffer member 2522 may be disposed in a fifth hole (not shown) of the second housing 2100. The fourth buffer member 2522 may be configured to be inserted into the fifth hole. The second buffer member 2322 may include a through hole into which the second extension portion 2520 is inserted.

[0235] The third and fourth buffer members 2521 and 2522 may prevent noise caused by vibration of the second extending portion 2520. In addition, the third and fourth buffer members 2521 and 2522 may prevent the second extending portion 2520 from being deformed or damaged by external impact.

[0236] The second camera actuator 2000 may include a first magnetic scaler 2610 , a first sensing unit (not shown), a second magnetic scaler 2620 , and a second sensing unit (not shown).

[0237] The first magnetic scaler 2610 may be provided on the first lens barrel 2200. For example, the first magnetic scaler 2610 may be provided on the first lower surface 2223. Specifically, the first magnetic scaler 2610 may be provided in the first groove 223h1 of the first lens barrel 2200. The first magnetic scaler 2610 may move along the optical axis direction together with the first lens barrel 2200.

[0238] The first magnetic scaler 2610 may include a plurality of magnets. For example, the first magnetic scaler 2610 may have N poles and S poles alternately arranged in the optical axis direction.

[0239] The first sensing unit may be disposed adjacent to the first magnetic scaler 2610. For example, the first sensing unit may be disposed facing the first magnetic scaler 2610 in the first direction (x-axis direction) or the second direction (y-axis direction). The first sensing unit may detect the position of the first magnetic scaler 2610. In this manner, the first sensing unit may detect the position and movement of the first lens barrel 2200 that moves together with the first magnetic scaler 2610.

[0240] The second magnetic scaler 2620 may be provided on the second lens barrel 2400. For example, the second magnetic scaler 2620 may be provided on the second upper surface 2423. Specifically, the second magnetic scaler 2620 may be provided in the third groove 2423h1 of the second lens barrel 2400. The second magnetic scaler 2620 may move along the optical axis together with the second lens barrel 2400.

[0241] The second magnetic scaler 2620 may include a plurality of magnets. For example, the second magnetic scaler 2620 may have N poles and S poles alternately arranged in the optical axis direction.

[0242] In addition, the second sensing unit can be provided adjacent to the second magnetic scaler 2620. For example, the second sensing unit can be provided facing the second magnetic scaler 2620 in the first direction (x-axis direction) or the second direction (y-axis direction). The second sensing unit can detect the position of the second magnetic scaler 2620. In this way, the second sensing unit can detect the position and movement of the second lens barrel 2400 that moves with the second magnetic scaler 2620.

[0243] In addition, although not shown in the drawings, the second camera actuator 2000 according to an embodiment may further include a gyro sensor (not shown). The gyro sensor may be provided in the second housing 2100. The gyro sensor may detect movement of a user using the camera actuator.

[0244] The second camera actuator 2000 according to an embodiment may include a second substrate 2800. The second substrate 2800 may be provided on the second housing 2100. The second substrate 2800 may be provided to surround a partial area of ​​the second housing 2100. For example, the second substrate 2800 may be provided to surround a portion of the outer side of the second sub-housing 2120. The second substrate 2800 may provide power or current to the components provided in the second housing 2100. That is, the second substrate 2800 may be a circuit board, and may include 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). The second substrate 2800 may be electrically connected to the first circuit board 310 described above.

[0245] Second substrate 2800 may include a first end 2810. First end 2810 may be disposed on first piezoelectric device 2310 of third drive unit 2300. For example, first end 2810 may be disposed on first disk portion 2311 of first piezoelectric device 2310. Specifically, first end 2810 may be disposed on one surface of first disk portion 2311. Furthermore, first end 2810 may be disposed on second piezoelectric device 2510 of fourth drive unit 2500. For example, second end 2820 may be disposed on second disk portion 2511 of second piezoelectric device 2510. Specifically, first end 2810 may be disposed on one surface of second disk portion 2511.

[0246] The second substrate 2800 may include a second end 2820. The first end 2810 may be spaced apart from the first end 2810. In addition, the second end 2820 may be provided in a region that does not overlap with the first end 2810 in the optical axis direction.

[0247] Second end 2820 may be disposed on first piezoelectric device 2310 of third drive unit 2300. For example, second end 2820 may be disposed on first disk portion 2311 of first piezoelectric device 2310. Specifically, first end 2810 may be disposed on a surface opposite to one surface of first disk portion 2311. Furthermore, second end 2820 may be disposed on second piezoelectric device 2510 of fourth drive unit 2500. For example, second end 2820 may be disposed on second disk portion 2511 of second piezoelectric device 2510. Specifically, second end 2820 may be disposed on a surface opposite to one surface of second disk portion 2511.

[0248] That is, the second substrate 2800 may supply power to the first and second piezoelectric devices 2310 and 2510. Thus, the third and fourth driving units 2300 and 2500 may respectively drive the first and second lens barrels 2200 and 2400 by the applied power.

[0249] As described above, the second camera actuator 2000 according to the embodiment includes the third drive unit 2300 and the fourth drive unit 2500 having a piezoelectric device, and the first and second lens barrels 2200 and 2400 can be moved in the optical axis direction by the third and fourth drive units 2300 and 2500. However, the embodiment is not limited thereto, and the third and fourth drive units 2300 and 2500 can include a voice coil motor (VCM) or a shape memory alloy. In this case, the third and fourth drive units 2300 and 2500 can move the first and second lens barrels 2200 and 2400 by using the electromagnetic force of the VCM or the physical change of the shape memory alloy.

[0250] The second camera actuator 2000 according to an embodiment may include an image sensor 2900. The image sensor 2900 may collect light that passes through the first lens unit 2105, the second lens unit 2205, and the third lens unit 2405 in this order and convert it into an image. The image sensor 2900 may be arranged to coincide with the optical axes of the lenses of the lens units 105, 205, and 405. The optical axes of the image sensor 2900 and the optical axes of the lenses may be aligned.

[0251] Figure 21 is a perspective view of a mobile terminal to which a camera module according to an embodiment is applied.

[0252] refer to Figure 21 , the mobile terminal 3 may include a camera module 10 , an auto focus device 31 , and a flash module 33 provided on the rear side.

[0253] The camera module 10 may include an image capturing function and an autofocus function. For example, the camera module 10 may include an autofocus function using an image.

[0254] The camera module 10 processes image frames of still images or moving images obtained by the image sensor in a shooting mode or a video call mode. The processed image frames can be displayed on a predetermined display unit and stored in a memory. A camera (not shown) can also be provided on the front of the mobile terminal body.

[0255] For example, the camera module 10 may include a first camera module 10A and a second camera module 10B. In this case, at least one of the first camera module 10A and the second camera module 10B may include the aforementioned camera module, for example, according to Figures 1 to 20Thus, the camera module 10 can implement the OIS function together with the zoom function and the auto focus function.

[0256] The autofocus device 31 may include an autofocus function using a laser. The autofocus device 31 may be primarily used in situations where the autofocus function using the image of the camera module 10 deteriorates, for example, at a proximity of 10 m or less or in a dark environment. The autofocus device 31 may include a light emitting unit including a vertical cavity surface emitting laser (VCSEL) semiconductor device and a light receiving unit (such as a photodiode) that converts light energy into electrical energy.

[0257] The flash module 33 may include a light emitting device that emits light therein. The flash module 33 may be operated by a camera operation of the mobile terminal or by a user's control.

[0258] Then, Figure 22 : is a perspective view of a vehicle 5 to which the camera module according to the embodiment is applied. For example, Figure 22 1 is an external view of a vehicle including a vehicle driving assistance device to which the camera module 10 according to the embodiment is applied.

[0259] refer to Figure 22 The vehicle 5 according to the embodiment may include wheels 53FL and 53RL that are rotated by a power source and a predetermined sensor. The sensor may be a camera sensor 51, but is not limited thereto.

[0260] The camera 51 may be a camera module according to an embodiment (eg, according to Figures 1 to 20 The camera module 10) is used for the camera sensor.

[0261] The vehicle 5 of the embodiment may acquire image information through a camera sensor 51 that captures a front image or a surrounding image, and may use the image information to determine a lane non-recognition situation and generate a virtual lane when the lane is not recognized.

[0262] For example, the camera sensor 51 may acquire a front image by photographing the front of the vehicle 5 , and the processor (not shown) may obtain image information by analyzing an object included in the front image.

[0263] For example, when objects such as medians, curbs, or street trees corresponding to lanes, adjacent vehicles, travel obstacles, and indirect road markings are captured in the image captured by the camera sensor 51, the processor can detect such objects and include them in the image information.

[0264] In this case, the processor may further supplement the image information by acquiring distance information from an object detected via the camera sensor 51. The image information may be information about an object captured in the image.

[0265] The camera sensor 51 may include an image sensor and an image processing module. The camera sensor 51 may process still images or moving images obtained by the image sensor (e.g., CMOS or CCD). The image processing module may process the still images or moving images obtained by the image sensor, extract necessary information, and transmit the extracted information to the processor.

[0266] In this case, the camera sensor 51 may include a stereo camera to improve the measurement accuracy of the object and further ensure information such as the distance between the vehicle 5 and the object, but is not limited thereto.

[0267] The features, structures, effects, etc. described in the above embodiments are included in at least one embodiment and are not necessarily limited to one embodiment. In addition, the features, structures, effects, etc. shown in each embodiment can be combined or modified for other embodiments by those skilled in the art of the embodiment. Therefore, the content related to such combinations and modifications should be interpreted as being included within the scope of the embodiments.

[0268] In the above, the embodiment has been mainly described, but this is only an example and does not limit the embodiment. It should be understood by those skilled in the art that various modifications and applications not shown above are possible without departing from the essential features of the embodiment. For example, each component specifically shown in the embodiment can be implemented through modification. And the differences related to these modifications and applications should be interpreted as being included in the scope of the embodiment set forth in the appended claims.

Claims

1. A camera actuator comprising: shell; a prism unit, the prism unit being disposed in the housing; as well as a first driving unit, configured to drive the prism unit; Wherein, the prism unit includes: Prism; and a prism mover disposed around the prism, and a second driving unit that is provided between the prism and the prism mover and drives the prism, and wherein the first driving unit tilts the prism unit in the second direction along a first axis perpendicular to the optical axis as a rotation axis and tilts the prism unit in the first direction along a second axis perpendicular to the optical axis and the first axis as a rotation axis, wherein the second driving unit tilts the prism in the first direction and the second direction along the first axis and the second axis to compensate for a driving deviation of the first driving unit, and Wherein, the driving displacement of the second driving unit is smaller than the driving displacement of the first driving unit.

2. The camera actuator according to claim 1, wherein: The second driving unit includes a plurality of piezoelectric devices, wherein the prism mover includes an inner surface facing one side surface of the prism and tilted at a predetermined angle, and Wherein, the plurality of piezoelectric devices are disposed on the inner surface of the prism mover.

3. The camera actuator according to claim 2, wherein: The first driving unit includes a plurality of sub-driving units, each of which includes a coil unit and a magnet. Wherein, the plurality of sub-driving units include: a first sub-driving unit, the first sub-driving unit facing a first outer surface of the prism mover; a second sub-driving unit facing a second outer surface of the prism mover; and a third sub-driving unit, the third sub-driving unit facing the lower surface of the prism mover, wherein the first sub-driving unit and the second sub-driving unit face each other in the first direction, and Wherein, the third sub-driving unit faces the prism unit in the second direction.

4. The camera actuator according to claim 3, wherein: The first driving unit is configured to rotate the prism unit in the second direction about a virtual first line formed by the first sub-driving unit and the second sub-driving unit in the first direction as an axis, and The first axis is an axis formed by the virtual first line.

5. The camera actuator according to claim 3, wherein: The first driving unit is configured to rotate the prism unit in the first direction about a virtual second line formed by the third sub-driving unit in the second direction as an axis, and The second axis is an axis formed by the virtual second line.

6. The camera actuator according to claim 3, wherein: The plurality of piezoelectric devices include: a first piezoelectric device and a second piezoelectric device, the first piezoelectric device and the second piezoelectric device being spaced apart from each other in the second direction; and A third piezoelectric device and a fourth piezoelectric device are spaced apart from each other in the first direction.

7. The camera actuator according to claim 6, wherein: The prism is configured to be rotationally movable in the second direction by at least one of the first piezoelectric device and the second piezoelectric device on the prism mover.

8. The camera actuator according to claim 6, wherein: The prism is configured to be rotationally movable in the first direction by at least one of the third piezoelectric device and the fourth piezoelectric device on the prism mover.

9. The camera actuator according to claim 2, wherein: The second driving unit includes: a circuit board disposed on the inner surface of the prism mover; and a base layer disposed on the circuit board and comprising a plurality of openings, The plurality of piezoelectric devices are respectively arranged in the plurality of openings.

10. The camera actuator according to claim 9, wherein: The base layer comprises an elastically deformable material.

11. The camera actuator according to claim 1, wherein: The first driving unit drives the prism unit using a first driving method, and The second driving unit drives the prism using a second driving method different from the first driving method.

12. The camera actuator according to claim 9, wherein: A thickness of each of the plurality of piezoelectric devices is greater than or equal to a thickness of the base layer.

13. A camera module comprising: a first camera actuator, and Second camera actuator, wherein the first camera actuator performs an OIS (Optical Image Stabilizer) function, wherein the second camera actuator performs an automatic focus or zoom function, wherein light incident from the outside passes through the first camera actuator and is incident on the second camera actuator, Wherein, the first camera actuator comprises: shell; a prism unit disposed in the housing; and a first driving unit, configured to drive the prism unit; Wherein, the prism unit includes: Prism; and a prism mover disposed around the prism, and a second driving unit that is provided between the prism and the prism mover and drives the prism, wherein the driving displacement of the second driving unit is smaller than the driving displacement of the first driving unit, wherein the first driving unit tilts the prism unit in the second direction along a first axis perpendicular to the optical axis as a rotation axis and tilts the prism unit in the first direction along a second axis perpendicular to the optical axis and the first axis as a rotation axis, and The second driving unit tilts the prism in the first direction and the second direction along the first axis and the second axis to compensate for a driving deviation of the first driving unit.

14. The camera module according to claim 13, wherein: The second driving unit includes a plurality of piezoelectric devices, wherein the prism mover includes an inner surface facing one side surface of the prism and tilted at a predetermined angle, and Wherein, the plurality of piezoelectric devices are disposed on the inner surface of the prism mover.

15. The camera module according to claim 14, wherein: The first driving unit includes a plurality of sub-driving units, each of which includes a coil unit and a magnet. Wherein, the plurality of sub-driving units include: a first sub-driving unit, the first sub-driving unit facing a first outer surface of the prism mover; a second sub-driving unit facing a second outer surface of the prism mover; and a third sub-driving unit, the third sub-driving unit facing the lower surface of the prism mover, wherein the first sub-driving unit and the second sub-driving unit face each other in the first direction, and Wherein, the third sub-driving unit faces the prism unit in the second direction.

16. The camera module according to claim 15, wherein: The first driving unit is configured to rotate the prism unit in the second direction about a virtual first line formed by the first sub-driving unit and the second sub-driving unit in the first direction as an axis, and The first camera actuator includes a lens unit and a lens driving unit, and the lens driving unit is configured to move the lens unit in a third direction corresponding to the optical axis.

17. The camera module according to claim 15, wherein: The first driving unit is configured to rotate the prism unit in the first direction about a virtual second line formed by the third sub-driving unit in the second direction as an axis.

18. The camera module according to claim 15, wherein: The plurality of piezoelectric devices include: a first piezoelectric device and a second piezoelectric device, the first piezoelectric device and the second piezoelectric device being spaced apart from each other in the second direction; and a third piezoelectric device and a fourth piezoelectric device, the third piezoelectric device and the fourth piezoelectric device being spaced apart from each other in the first direction, and The prism is configured to be rotationally movable in the second direction by at least one of the first piezoelectric device and the second piezoelectric device on the prism mover.

19. The camera module according to claim 18, wherein: The prism is configured to be rotationally movable in the first direction by at least one of the third piezoelectric device and the fourth piezoelectric device on the prism mover.

20. The camera module according to claim 14, wherein The second driving unit includes: a circuit board disposed on the inner surface of the prism mover; and a base layer disposed on the circuit board and comprising a plurality of openings, The plurality of piezoelectric devices are respectively arranged in the plurality of openings.

Images