Camera actuator

Abstract

A camera actuator includes: a first OIS carrier having first and second magnets and an image sensor, and configured to move in a first direction perpendicular to an optical axis direction; a first driving coil configured to generate an electromagnetic force on the first magnet to move the first OIS carrier in the first direction; a second OIS carrier disposed on an upper portion of the first OIS carrier and configured to move in a second direction perpendicular to the optical axis direction and the first direction; a second driving coil configured to generate an electromagnetic force on the second magnet to move the second OIS carrier in the second direction; and a support frame having the first drive coil and the second drive coil and configured to provide a movement space for the first OIS carrier and the second OIS carrier.

Description

Technical Field

[0001] The present invention relates to a camera actuator, and more particularly, to an actuator capable of realizing auto-focusing and optical image stabilization functions. Background Art

[0002] With the advancement of hardware technology for image processing and the increase in user needs for image capturing, etc., functions such as auto focus (AF) and optical image stabilization (OIS) are implemented in independent camera devices as well as camera modules installed in mobile terminals such as mobile phones and smart phones.

[0003] The autofocus function is a function that adjusts the focal length relative to the object by linearly moving a carrier equipped with a lens etc. in the direction of the optical axis, thereby producing a clear image on an image sensor (CMOS, CCD, etc.) provided at the rear end of the lens.

[0004] In addition, the optical image stabilization function refers to a function of improving image clarity by adaptively moving a carrier on which a lens is mounted to compensate for the shaking of the lens when the lens is shaken due to hand shaking problems.

[0005] One of the representative methods for realizing the AF or OIS function is a method of mounting a magnet (coil) on a movable body (carrier), mounting a coil (magnet) on a fixed body (housing, another type of carrier, etc.), and then generating an electromagnetic force between the coil and the magnet to move the movable body in the optical axis direction or in a direction perpendicular to the optical axis.

[0006] In addition, there is a device that connects a wire to a carrier to achieve the function of physically supporting the carrier and the function of restoring the position of the carrier. However, the wire of this device is easily changed in physical properties due to internal and external environments, which may reduce the driving accuracy. In particular, in the case where the weight and size of the lens increase due to the high specifications of the lens, the driving performance may be further reduced.

[0007] Recently, in order to solve the problems of linear devices, a structure has been applied in which balls are inserted between a movable body and a fixed body to constantly maintain an appropriate spacing distance between the movable body and the fixed body, and friction is minimized by rotational movement of the balls and point contact with the balls, thereby allowing the carrier to move more smoothly and accurately.

[0008] In the case of a device or actuator having integrated AF and OIS functions, the AF needs to move in the optical axis direction and the OIS needs to move in a direction perpendicular to the optical axis. Therefore, the device or actuator is implemented as a complex physical structure in which AF and OIS carriers are stacked on each other.

[0009] The actuator in the prior art performs optical image stabilization by moving the lens assembly in a direction perpendicular to the optical axis direction. However, because the lens assembly accounts for most of the weight of the camera module, there is a problem that the movement accuracy of the lens assembly and the performance reliability of the camera module are deteriorated.

[0010] Furthermore, in the related art actuator, the magnets and driving coils for moving the AF and OIS carriers are disposed in a lying position, which significantly increases the height of the actuator in the optical axis direction.

[0011] That is, because the camera actuator is vertically mounted on the main substrate of a portable terminal such as a smart phone, the increase in the height of the actuator directly increases the thickness of the portable terminal. For this reason, for the actuator in the related art, there is a problem that it cannot meet the trend of slim portable terminals and has extremely low space utilization.

[0012] Furthermore, in the case of the prior art actuator, the height, size, etc. of the structure and components directly related to the driving performance need to be reduced to meet the thickness specifications of the portable terminal, etc., which ultimately leads to the problem of deterioration of the driving performance of the prior art device. Summary of the invention

[0013] Technical issues The present invention is made to solve the above-mentioned problems discussed in the background art section, and an object of the present invention is to provide a camera actuator capable of relatively easily implementing OIS and improving the reliability of a camera module.

[0014] Another object of the present invention is to provide a camera actuator capable of significantly reducing the thickness of the actuator (based on the optical axis direction).

[0015] Still another object of the present invention is to provide a camera actuator capable of minimizing the extent to which a magnetic field of an OIS driving section affects an AF driving section.

[0016] Still another object of the present invention is to provide a camera actuator capable of not only preventing an OIS ball from being separated to the outside but also preventing interference with a base when an OIS carrier moves.

[0017] Other objects and advantages of the present invention can be understood from the following description and can be more clearly understood from the embodiments of the present invention.In addition, the objects and advantages of the present invention can be achieved by the components and combinations of components disclosed in the claims.

[0018] Technical Solution In order to achieve the above-mentioned objectives, the present invention provides a camera actuator, which includes: a first OIS carrier, having a first magnet, a second magnet and an image sensor, and configured to move in a first direction perpendicular to an optical axis direction; a first drive coil, configured to generate an electromagnetic force on the first magnet so that the first OIS carrier moves in the first direction; a second OIS carrier, arranged on an upper portion of the first OIS carrier, and configured to move in a second direction perpendicular to the optical axis direction and the first direction; a second drive coil, configured to generate an electromagnetic force on the second magnet so that the second OIS carrier moves in the second direction; and a supporting frame, having the first drive coil and the second drive coil, and configured to provide a moving space for the first OIS carrier and the second OIS carrier.

[0019] In addition, the camera actuator of the present invention may further include: a first guide rail, which is arranged on the upper portion of the first OIS carrier and is arranged along the first direction; a second guide rail, which is arranged on the lower portion of the second OIS carrier and is arranged to face the first guide rail; and a first OIS ball, which is arranged between the first guide rail and the second guide rail.

[0020] In addition, the camera actuator of the present invention may further include: a third guide rail, which is arranged on the upper portion of the second OIS carrier and is arranged along the second direction; a fourth guide rail, which is arranged on the lower portion of the support frame and is arranged to face the third guide rail; and a second OIS ball, which is arranged between the third guide rail and the fourth guide rail.

[0021] Furthermore, the support frame may have an attraction yoke disposed to face the first magnet and the second magnet, respectively, and configured to pull the first OIS carrier toward the support frame.

[0022] In addition, the camera actuator of the present invention may further include: an AF carrier having a third magnet and a lens assembly and configured to move in the direction of the optical axis; and a third drive coil disposed on the support frame and configured to generate an electromagnetic force on the third magnet to move the AF carrier in the direction of the optical axis.

[0023] In addition, the camera actuator of the present invention may further include: a fifth guide rail, which is arranged on the outer portion of the AF carrier and is arranged along the optical axis direction; a sixth guide rail, which is arranged on the inner portion of the support frame and is arranged to face the fifth guide rail; and an AF ball, which is arranged between the fifth guide rail and the sixth guide rail.

[0024] Furthermore, the support frame may have a container configured to accommodate the first magnet and the second magnet.

[0025] Furthermore, an attraction yoke may be provided on an upper portion of the container.

[0026] In addition, the camera actuator of the present invention may also include: a first Hall sensor, arranged on the inner side of the first drive coil; a second Hall sensor, arranged on the inner side of the second drive coil; and a third Hall sensor, arranged on the outer side of the third drive coil and arranged at a position farthest away from the first magnet and the second magnet.

[0027] Furthermore, the first magnet may be disposed closer to the second magnet based on the center thereof.

[0028] Beneficial Effects According to the present invention, the actuator corrects the hand-shake problem by moving the relatively light-weight image sensor instead of moving the lens assembly, which occupies most of the weight of the camera module. Therefore, OIS can be relatively easily implemented and the reliability of the camera module can be improved.

[0029] Furthermore, according to the present invention, the magnets and driving coils constituting the AF and OIS driving components are arranged vertically in the optical axis direction, which can significantly reduce the thickness of the actuator (based on the optical axis direction).

[0030] Furthermore, according to the present invention, it is possible to minimize the extent to which the magnetic field of the OIS driving section affects the AF driving section.

[0031] Furthermore, according to the present invention, not only can the OIS ball be prevented from being separated to the outside, but also interference with the base when the OIS carrier moves can be prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a perspective view of a camera actuator according to an embodiment of the present invention.

[0033] Figure 2 and Figure 3 is an exploded connection diagram showing the configuration of an actuator according to an embodiment of the present invention.

[0034] Figure 4 is an exploded connection diagram of a first OIS carrier and a second OIS carrier according to an embodiment of the present invention.

[0035] Figure 5 1 is a view for explaining an OIS function of a first OIS carrier and a second OIS carrier according to an embodiment of the present invention.

[0036] Figure 6 and Figure 7 is a perspective view of a support frame according to an embodiment of the present invention.

[0037] Figure 8is an exploded connection diagram of a support frame and an AF carrier according to an embodiment of the present invention.

[0038] Fig. 9 is a plan view of the connection between the support frame and the AF carrier according to an embodiment of the present invention.

[0039] Fig.10 1 is a view for explaining the function of an attraction yoke provided on a support frame according to an embodiment of the present invention. DETAILED DESCRIPTION

[0040] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the terms or words used in the specification and claims should not be interpreted as limited to the general or dictionary meanings, but should be interpreted as meanings and concepts that conform to the technical spirit of the present invention based on the principle that the inventor can appropriately define the concept of the term in order to describe his / her own invention in the best way.

[0041] Therefore, the exemplary embodiments disclosed in this specification and the configurations shown in the accompanying drawings are merely the best preferred exemplary embodiments of the present invention, and do not represent the entire technical spirit of the present invention. Therefore, it should be understood that various equivalents and modified examples that can replace the exemplary embodiments may be made when submitting this application.

[0042] Figure 1 is a perspective view of a camera actuator (hereinafter referred to as “actuator”) according to an embodiment of the present invention, Figure 2 and Figure 3 is an exploded connection diagram showing the configuration of an actuator according to an embodiment of the present invention.

[0043] In the following, we will first refer to Figures 1 to 3 The overall configuration of the present invention is described, and then a detailed description of an embodiment of the present invention for realizing AF and OIS functions will be described below.

[0044] The actuator 100 according to the embodiment of the present invention is an embodiment that realizes both auto focus (AF) and optical image stabilization (OIS) at the same time. However, the actuator 100 of the present invention can of course be realized as an actuator for only OIS operation.

[0045] like Figures 1 to 3 As shown, the actuator 100 according to the embodiment of the present invention may include a base 110 , a first OIS carrier 130 , a second OIS carrier 140 , a support frame 150 , an AF carrier 160 , and a housing 170 .

[0046] The first OIS carrier 130 has first and second magnets M1 and M2 and the image sensor 120, and the support frame 150 has first to third driving coils C1, C2, and C3 (see Figure 6). In addition, the AF carrier 160 has a third magnet M3 and a lens assembly (not shown).

[0047] In this case, the AF carrier 160 may have an opening portion formed at the center thereof so that the lens assembly is installed in the opening portion. The second OIS carrier 140 and the support frame 150 respectively have opening portions formed at the centers thereof so that the lens assembly can move in the upward / downward direction when implementing AF.

[0048] In addition, the image sensor 120 is mounted on the lower portion of the first OIS carrier 130. In addition, the first OIS carrier 130 has an opening portion formed at the center thereof so that the image sensor 120 is exposed in the optical axis direction. Therefore, the image sensor 120 can detect light introduced from the lens assembly. In this case, the image sensor 120 may include an image capturing element such as a charge coupled device (CCD) and a complementary metal oxide semiconductor (CMOS).

[0049] Figures 1 to 3 The Z-axis direction shown in is an optical axis direction, which is a direction in which light is introduced into the lens assembly. The Z-axis direction corresponds to a direction in which the AF carrier 160, which will be described below, moves forward or backward.

[0050] When the AF carrier 160 moves forward or backward in the optical axis direction, the focal length between the image sensor 120 and the lens assembly provided at the rear end of the actuator 100 is adjusted, thereby realizing the AF function. A detailed description thereof will be described below.

[0051] In addition, the X-axis direction and the Y-axis direction are directions perpendicular to the optical axis direction (Z-axis direction), indicating the direction in which the image sensor 120 moves by OIS driving to compensate for shaking caused by hand shaking problems. In the following description, the X-axis direction is referred to as the first direction, and the Y-axis direction is referred to as the second direction. However, from a relative point of view, the X-axis direction and the Y-axis direction are just an example. Of course, any one of the X-axis direction and the Y-axis direction may be the first direction, and the other of the X-axis direction and the Y-axis direction may be the second direction.

[0052] like Figure 2 and Figure 3 As shown, the actuator 100 according to the embodiment of the present invention has a structure in which a first OIS carrier 130 , a second OIS carrier 140 , a support frame 150 , an AF carrier 160 , and a housing 170 are sequentially disposed with respect to a base 110 .

[0053] Figure 4 is an exploded connection diagram of a first OIS carrier and a second OIS carrier according to an embodiment of the present invention, Figure 51 is a view for explaining the OIS function of the first OIS carrier and the second OIS carrier according to an embodiment of the present invention. Figure 6 and Figure 7 is a perspective view of a support frame according to an embodiment of the present invention.

[0054] In the following, reference will be made to Figures 4 to 7 The implementation of OIS of an actuator according to an embodiment of the present invention is described.

[0055] The actuator 100 according to an embodiment of the present invention includes a first guide rail 131, a second guide rail 141 and a first OIS ball B1, the first guide rail 131 is arranged on the upper part of the first OIS carrier 130 and is arranged along the first direction (X-axis direction), the second guide rail 141 is arranged on the lower part of the second OIS carrier 140 and is arranged to face the first guide rail 131, and the first OIS ball B1 is arranged between the first guide rail 131 and the second guide rail 141.

[0056] The first OIS ball B1 may roll between the first guide rail 131 and the second guide rail 141 and move the first OIS carrier 130 in the first direction.

[0057] The first guide rails 131 may be respectively formed at corners of the first OIS carrier 130, and the second guide rails 141 may also be respectively formed at corners of the second OIS carrier 140. However, the present invention is not limited thereto.

[0058] The first magnet M1 is upright mounted on the upper portion of the first OIS carrier 130 and disposed between two first OIS balls B1 in the first direction.

[0059] The first driving coil C1 may be disposed on an inner surface of the support frame 150 and face the first magnet M1 , and the first hall sensor S1 may be disposed at an inner side of the first driving coil C1 .

[0060] When the OIS function is implemented in the first direction (X-axis direction), the first OIS carrier 130 moves in the first direction relative to the second OIS carrier 140 in the internal space of the support frame 150. Therefore, the first OIS carrier 130 corresponds to a movable body, and from a corresponding point of view, the second OIS carrier 140 corresponds to a fixed body.

[0061] The first Hall sensor S1 transmits an electrical signal corresponding to the direction and magnitude of movement caused by the hand-shake problem to an operation driver (not shown). The operation driver performs control to apply power having a magnitude and direction corresponding to the electrical signal to the first drive coil C1.

[0062] When power is applied to the first driving coil C1 , the first driving coil C1 generates an electromagnetic force on the first magnet M1 mounted on the first OIS carrier 130 , and the first OIS carrier 130 moves in the first direction by the electromagnetic force.

[0063] In this case, since the image sensor 120 is coupled to the first OIS carrier 130, when the first OIS carrier 130 moves in the first direction, the image sensor 120 also moves in the first direction. Therefore, the hand shake problem is corrected by the component in the first direction.

[0064] The first OIS carrier 130 may be moved by feedback control between the first hall sensor S1 and an operation driver.

[0065] The actuator 100 according to an embodiment of the present invention includes a third guide rail 142, a fourth guide rail 153 and a second OIS ball B2, the third guide rail 142 is arranged on the upper part of the second OIS carrier 140 and is arranged along the second direction (Y-axis direction), the fourth guide rail 153 is arranged on the lower part of the supporting frame 150 and is arranged to face the third guide rail 142, and the second OIS ball B2 is arranged between the third guide rail 142 and the fourth guide rail 153.

[0066] The second OIS ball B2 may roll between the third guide rail 142 and the fourth guide rail 153 and move the second OIS carrier 140 in the second direction.

[0067] The third guide rails 142 may be respectively formed at the corners of the second OIS carrier 140, and the fourth guide rails 153 may also be respectively formed at the corners of the support frame 150. However, the present invention is not limited thereto.

[0068] In addition, the third guide rail 142 and the fourth guide rail 153 may be disposed so as not to overlap with the first guide rail 131 and the second guide rail 141 .

[0069] The second magnet M2 is upright mounted on the upper portion of the first OIS carrier 130 and disposed between two second OIS balls B2 in the second direction.

[0070] The second driving coil C2 may be disposed on an inner surface of the support frame 150 and face the second magnet M2 , and the second hall sensor S2 may be disposed at an inner side of the second driving coil C2 .

[0071] When the OIS function is implemented in the second direction (Y-axis direction), the second OIS carrier 140 moves in the second direction relative to the support frame 150 in the internal space of the support frame 150. Therefore, the second OIS carrier 140 corresponds to a movable body, and from a corresponding point of view, the support frame 150 corresponds to a fixed body.

[0072] The second Hall sensor S2 transmits an electrical signal corresponding to the direction and magnitude of movement caused by the hand-shake problem to an operation driver (not shown). The operation driver performs control to apply power having a magnitude and direction corresponding to the electrical signal to the second drive coil C2.

[0073] When power is applied to the second driving coil C2 , the second driving coil C2 generates an electromagnetic force on the second magnet M2 mounted on the first OIS carrier 130 , and the second OIS carrier 140 moves in the second direction by the electromagnetic force.

[0074] In this case, the image sensor 120 is coupled to the first OIS carrier 130, and the first OIS carrier 130 is coupled to the second OIS carrier 140, so that when the second OIS carrier 140 moves in the second direction, the first OIS carrier 130 and the image sensor 120 also move in the second direction. Therefore, the hand shake problem is corrected by the component in the second direction.

[0075] The second OIS carrier 140 may be moved by feedback control between the second hall sensor S2 and the operation driver.

[0076] As described above, the actuator 100 according to the embodiment of the present invention corrects the hand-shake problem by moving the relatively light image sensor 120 instead of moving the lens assembly that accounts for most of the weight of the camera module. Therefore, OIS can be relatively easily implemented and the reliability of the camera module can be improved.

[0077] Return to reference Figure 6 , the support frame 150 may have a container 152 configured to accommodate the first magnet M1 and the second magnet M2. In this case, the container 152 may be formed in a substantially "ㄱ" shape. Of course, the first drive coil C1 and the second drive coil C2 facing the first magnet M1 and the second magnet M2, respectively, are disposed in the container 152.

[0078] As described above, since the first magnet M1 and the second magnet M2 are disposed and accommodated in the container 152 , the third hall sensor S3 may be prevented from being affected by the magnetic field formed by the first magnet M1 and the second magnet M2 .

[0079] Figure 8 is an exploded connection diagram of a support frame and an AF carrier according to an embodiment of the present invention, and Fig. 9 4 is a top view of the connection between the support frame and the AF carrier according to an embodiment of the present invention.

[0080] In the following, reference will be made to Figure 8 and Fig. 9The implementation of the AF function of the actuator according to the embodiment of the present invention is described.

[0081] The actuator 100 according to an embodiment of the present invention includes a fifth guide rail 161, a sixth guide rail 151 and an AF ball B3, the fifth guide rail 161 is arranged on the outer portion of the AF carrier 160 and is arranged along the optical axis direction (Z-axis direction), the sixth guide rail 151 is arranged on the inner portion of the supporting frame 150 and is arranged to face the fifth guide rail 161, and the AF ball B3 is arranged between the fifth guide rail 161 and the sixth guide rail 151.

[0082] The AF ball B3 may roll between the fifth guide rail 161 and the sixth guide rail 151 and move the AF carrier 160 in the optical axis direction.

[0083] The fifth guide rail 161 may be formed at two opposite sides of the outer surface of the AF carrier 160 where the first to fourth guide rails 131 , 141 , 142 , and 153 are not disposed.

[0084] The third magnet M3 may be disposed between the fifth guide rails 161. The third driving coil C3 may be disposed on the inner surface of the support frame 150 and face the third magnet M3, and the third hall sensor S3 may be disposed outside the third driving coil C3.

[0085] The support frame 150 may provide a moving space for the AF carrier 160. In addition, the AF carrier 160 is disposed in the support frame 150 and moves in the optical axis direction (Z-axis direction) with the support frame 150 as a reference. Therefore, when the AF carrier 160 is a movable body, the support frame 150 corresponds to a fixed body from a corresponding point of view.

[0086] When power having an appropriate magnitude and direction is applied to the third driving coil C3 , the third driving coil C3 generates an electromagnetic force on the third magnet M3 mounted on the AF carrier 160 , and the AF carrier 160 moves in the optical axis direction by the electromagnetic force.

[0087] Since the lens assembly is mounted on the AF carrier 160 , when the AF carrier 160 moves in the optical axis direction, the lens assembly also moves in the optical axis direction, so that the focal length relative to the image sensor 120 is adjusted.

[0088] The AF carrier 160 may be moved by feedback control between the third hall sensor S3 and the operation driver.

[0089] In addition, the third Hall sensor S3 may be affected by the magnetic field formed by the first magnet M1 and the second magnet M2. In particular, since the second magnet M2 is far away from the third Hall sensor S3, the second magnet M2 is not greatly affected. However, since the first magnet M1 is disposed relatively close to the third Hall sensor S3, the third Hall sensor S3 may be affected according to the movement of the first magnet M1.

[0090] To prevent this, Figure 6 As shown, the third Hall sensor S3 may be disposed outside the third driving coil C3 and disposed at a position farthest away from the first magnet M1 and the second magnet M2 .

[0091] In addition, if Fig. 9 As shown, since the first magnet M1 is disposed closer to the second magnet M2 based on the center thereof, the degree to which the third hall sensor S3 is affected by the first magnet M1 can be minimized.

[0092] The movement of the first OIS carrier 130 in the first direction, the movement of the second OIS carrier 140 in the second direction, and the movement of the AF carrier 160 in the optical axis direction are independently performed by separate processes and separate physical structures. Therefore, the movement in each direction can be performed independently. Alternatively, of course, the movement in a plurality of combined directions (XY, XZ, YZ, XYZ, etc.) can be performed simultaneously.

[0093] According to the actuator 100 of the above-mentioned embodiment of the present invention, the first to third magnets M1, M2 and M3 and the first to third drive coils C1, C2 and C3 are uprightly arranged along the optical axis direction, so that the thickness of the actuator 100 (based on the optical axis direction) can be significantly reduced.

[0094] Recently, according to the increase in the width of the screen display device of the portable terminal, the width of the main substrate has been sufficiently increased. Since the size of the actuator 100 of the present invention is increased only in the width direction (i.e., the horizontal direction based on the optical axis), a structure that more appropriately conforms to the trend of the portable terminal can be realized.

[0095] Fig.10 1 is a view for explaining the function of an attraction yoke provided on a support frame according to an embodiment of the present invention.

[0096] like Fig.10 As shown, the support frame 150 may have an attraction yoke 154 disposed to face upper portions (based on the optical axis direction) of the first and second magnets M1 and M2 , respectively, and configured to pull the first OIS carrier 130 toward the support frame 150 .

[0097] In this case, the attraction yoke 154 may be disposed on the upper portion of the container 152 of the support frame 150 and face the upper portions of the first magnet M1 and the second magnet M2, respectively (based on the optical axis direction). In addition, the attraction yoke 154 may be made of a metallic material having magnetism and generate an attraction force together with the first magnet M1 and the second magnet M2.

[0098] Therefore, the attraction yoke 154 can pull the first OIS carrier 130 toward the support frame 150 by utilizing the attraction force between the attraction yoke 154 and the first and second magnets M1 and M2. Therefore, the first OIS ball B1 can be prevented from being separated to the outside. In addition, the attraction yoke 154 can move the first OIS carrier 130 to be separated from the bottom surface of the base 110 by a predetermined distance, thereby preventing interference with the base 110 when the first OIS carrier 130 moves.

[0099] In addition, refer to Figure 4 , the first OIS ball B1 may be disposed on the same line as the first magnet M1 and the second magnet M2 to maximize the use of the attraction force between the attraction yoke 154 and the first magnet M1 and the second magnet M2.

[0100] The present invention has been described with reference to limited embodiments and drawings, but the present invention is not limited thereto. The described embodiments may be changed or modified by those skilled in the art within the technical spirit of the present invention and within the scope equivalent to the appended claims.

[0101] In the above description of the present invention, modifiers such as first and second are merely instrumental conceptual terms for distinguishing constituent elements relative to each other, and should not be construed as terms for indicating any specific order, priority, etc.

[0102] The description of the present invention and the accompanying drawings for the purpose of illustrating the embodiments may be slightly exaggerated to emphasize or highlight the technical content of the technology according to the present invention. However, it should be understood that various modifications and applications can be made at the level of those skilled in the art, taking into account the contents disclosed and illustrated in the specification and the drawings.

[0103] Industrial Applicability The camera actuator according to the present invention may be applied to a stand-alone camera device as well as a camera module installed in a mobile terminal such as a mobile phone and a smart phone, etc.

Claims

1. A camera actuator, comprising: A supporting frame configured to have a receiving space; a first OIS carrier disposed in the accommodation space, configured to have a magnet, and configured to be movable in a direction perpendicular to the optical axis; a second OIS carrier, disposed in the accommodation space and above the first OIS carrier; A ball bearing, disposed between the first OIS carrier and the second OIS carrier; as well as An attraction yoke is provided at the support frame to face the magnet and is configured to pull the first OIS carrier in a direction on the optical axis.

2. The camera actuator according to claim 1, wherein: The attraction yoke is configured to pull the first OIS carrier toward an upper portion of the support frame through an attraction action with the magnet.

3. The camera actuator according to claim 1, wherein: The support frame is configured to have a driving coil on one side facing the magnet.

4. The camera actuator according to claim 1, wherein: The driving coil is configured to generate an electromagnetic force on the magnet to move the first OIS carrier in a direction perpendicular to the optical axis.

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