Camera actuator and camera module comprising same

Abstract

Disclosed in an embodiment is a camera actuator comprising: a housing; a first carrier disposed inside the housing; a second carrier which is disposed inside the first carrier and which can move in the optical axis direction; a first coil and a second coil disposed on a first side surface of the housing; and a third coil and a fourth coil disposed on a second side surface of the housing facing the first side surface, wherein the first coil and the second coil are disposed in a first direction perpendicular to the optical axis direction, and the third coil and the fourth coil are disposed in the first direction.

Description

Camera actuator and camera module including the same

[0001] The embodiment relates to a camera actuator and a camera module including the same.

[0002] A camera is a device that captures images or videos of a subject, and is installed in portable devices, drones, vehicles, etc. Camera modules may have an image stabilization (IS) function that compensates for or prevents image shaking caused by the user's movements to improve image quality, an auto focusing (AF) function that automatically adjusts the distance between the image sensor and the lens to align the focal length of the lens, and a zooming function that increases or decreases the magnification of a distant subject and captures it using a zoom lens.

[0003] The camera actuator can be driven by moving the lens assembly using the magnetic force of the coil and magnet. In this case, there is a problem that only one of the coils driving the camera actuator generates driving force, and the other coil does not contribute to the driving force. In addition, the coil is positioned perpendicular to the optical axis, and the rotational axis is positioned at 45 degrees to the optical axis, and the rotational moment distance is short, which causes the driving efficiency to be low. In addition, when tilting is performed, the distance between the coil and the magnet inevitably increases, which causes the driving force to be reduced.

[0004] The embodiment provides a camera actuator with increased driving force and a camera module including the same.

[0005] In addition, a camera actuator with increased driving efficiency and a camera module including the same are provided.

[0006] In addition, a camera actuator with improved shake correction function and a camera module including the same are provided.

[0007] The problem to be solved in the embodiment is not limited to this, and it can be said that the purpose or effect that can be understood from the solution or embodiment of the problem described below is also included.

[0008] A camera actuator according to an embodiment comprises: a housing; a first carrier disposed inside the housing; a second carrier disposed inside the first carrier and movable in the direction of an optical axis; a first coil and a second coil disposed on a first side of the housing, and a third coil and a fourth coil disposed on a second side of the housing facing the first side; wherein the first coil and the second coil are disposed in a first direction perpendicular to the direction of the optical axis, and the third coil and the fourth coil can be disposed in the first direction.

[0009] A camera actuator according to an embodiment includes a first magnet and a second magnet respectively disposed on two opposite sides of the first carrier, wherein the first magnet may be adjacent to the first side of the housing, and the second magnet may be adjacent to the second side of the housing.

[0010] The first magnet overlaps the first coil and the second coil in a second direction, and the second magnet overlaps the third coil and the fourth coil in the second direction, and the second direction may be a direction perpendicular to the optical axis direction and the first direction.

[0011] The first coil may overlap with the third coil in the second direction, and the second coil may overlap with the fourth coil in the second direction.

[0012] The first carrier can rotate around a first axis parallel to the first direction or a second axis parallel to the second direction.

[0013] When the directions of the currents flowing in the first coil and the second coil are the same, and the directions of the currents flowing in the third coil and the fourth coil are the same, the first carrier can rotate around the first axis.

[0014] When the direction of the current flowing in the first coil and the fourth coil is the same, and the direction of the current flowing in the second coil and the third coil is opposite to the direction of the current flowing in the first coil and the fourth coil, the first carrier can rotate around the second axis.

[0015] The housing may include a third side disposed between the first side and the second side, and may include a fifth coil disposed on a side of the first carrier adjacent to the third side of the housing.

[0016] The second carrier may include a third magnet disposed on a side adjacent to the third side.

[0017] The fifth coil and the third magnet can overlap in the first direction.

[0018] A camera actuator according to an embodiment may include a guide portion disposed between the bottom surface of the first carrier and the housing.

[0019] The guide portion includes a first protrusion and a second protrusion protruding toward the first carrier, and the first protrusion and the second protrusion can be spaced apart in the second direction.

[0020] The first protrusion may overlap the first magnet in the optical axis direction, and the second protrusion may overlap the second magnet in the optical axis direction.

[0021] The guide portion further includes a third protrusion and a fourth protrusion that protrude in opposite directions to the first protrusion and the second protrusion, and the third protrusion and the fourth protrusion can be spaced apart in the first direction.

[0022] A camera actuator according to an embodiment includes a substrate disposed on an outer side of the housing, the substrate including a first sub-substrate disposed on the first side of the housing, a second sub-substrate disposed on the second side of the housing, and a third sub-substrate disposed on the third side of the housing, wherein the first coil and the second coil may be disposed on the first sub-substrate, and the third coil and the fourth coil may be disposed on the second sub-substrate.

[0023] A camera actuator according to an embodiment comprises a housing; a first carrier disposed inside the housing; a first coil and a second coil disposed on a first side of the housing, and a third coil and a fourth coil disposed on a second side of the housing facing the first side; and a first magnet disposed on the first carrier to face the first and second coils and a second magnet disposed on the first carrier to face the third and fourth coils, wherein the first carrier can rotate around a first axis parallel to a first direction perpendicular to an optical axis direction and a second axis parallel to a second direction perpendicular to the optical axis direction and the first direction.

[0024] A camera actuator according to an embodiment comprises a housing: a first carrier disposed inside the housing; a second carrier disposed inside the first carrier and movable in the direction of an optical axis; first to fourth coils disposed between a bottom surface of the first carrier and the housing; and a guide portion disposed between the first to fourth coils and the first carrier, wherein the guide portion includes a first protrusion to a fourth protrusion, wherein the first coil and the second coil are disposed in a first direction perpendicular to the direction of the optical axis, the third coil and the fourth coil are disposed in the first direction, and the first protrusion may be disposed between the first coil and the second coil, and the second protrusion may be disposed between the third coil and the fourth coil.

[0025] The first coil and the second coil are arranged adjacent to a first side of the housing, and the third coil and the fourth coil are arranged adjacent to a second side of the housing spaced apart from the first side in a second direction, wherein the second direction may be a direction perpendicular to the optical axis direction and the first direction.

[0026] The second coil and the fourth coil may be disposed adjacent to a third side of the housing disposed between the first side and the second side, and the first coil and the third coil may be disposed adjacent to a fourth side spaced apart from the third side in the first direction.

[0027] It includes a first magnet to a fourth magnet arranged inside the first carrier, and the first magnet to the fourth magnet can overlap with the first coil to the fourth coil in the optical axis direction, respectively.

[0028] The third protrusion may be disposed between the second coil and the fourth coil, and the fourth protrusion may be disposed between the first coil and the third coil.

[0029] The first carrier can rotate around a first axis parallel to the first direction or a second axis parallel to the second direction.

[0030] When the direction of the current flowing in the first coil and the second coil is the same, and the direction of the current flowing in the third coil and the fourth coil is opposite to the direction of the current flowing in the first coil and the second coil, the first carrier can rotate around the first axis.

[0031] When the direction of the current flowing in the first coil and the third coil is the same, and the direction of the current flowing in the second coil and the fourth coil is opposite to the direction of the current flowing in the first coil and the third coil, the first carrier can rotate around the second axis.

[0032] The first axis may overlap with the third protrusion and the fourth protrusion in the optical axis direction, and the second axis may overlap with the first protrusion and the second protrusion in the optical axis direction.

[0033] The first protrusion and the second protrusion may each include a first protrusion and a second protrusion protruding in a direction toward the first carrier.

[0034] The third protrusion and the fourth protrusion may each include a third protrusion and a fourth protrusion protruding in opposite directions to the first protrusion and the second protrusion.

[0035] The substrate may include a first substrate groove overlapping the third protrusion and a second substrate groove overlapping the fourth protrusion, wherein the substrate includes a first to fourth coils arranged on the substrate.

[0036] When the first carrier rotates around the first axis, as the distance between the first coil and the first magnet in the optical axis direction increases, the distance between the third coil and the third magnet in the optical axis direction may decrease.

[0037] When the first carrier rotates around the second axis, as the distance between the first coil and the first magnet in the optical axis direction increases, the distance between the second coil and the second magnet in the optical axis direction may decrease.

[0038] The first axis may overlap with the third protrusion and the fourth protrusion in the optical axis direction, and the second axis may overlap with the first protrusion and the second protrusion in the optical axis direction.

[0039] According to an embodiment, a camera actuator with increased driving force and a camera module including the same can be provided.

[0040] In addition, a camera actuator with increased driving efficiency and a camera module including the same can be provided.

[0041] In addition, a camera actuator with improved shake correction function and a camera module including the same can be provided.

[0042] The various advantageous and beneficial effects of the present invention are not limited to the above-described contents, and will be more easily understood in the course of explaining specific embodiments of the present invention.

[0043] Figure 1 is a perspective view of a camera actuator according to an embodiment;

[0044] Figure 2 is an exploded perspective view of a camera actuator according to an embodiment;

[0045] Figures 3 and 4 are perspective views of a housing of a camera actuator according to an embodiment;

[0046] Fig. 5 is a perspective view of a guide part of a camera actuator according to an embodiment;

[0047] Fig. 6 is a perspective view of the substrate portion of the camera actuator according to the embodiment;

[0048] Fig. 7 is a perspective view showing the housing, guide part, and substrate part combined in a camera actuator according to an embodiment.

[0049] Fig. 8 is a perspective view of a first carrier of a camera actuator according to an embodiment;

[0050] Fig. 9 is an exploded perspective view of a first carrier of a camera actuator according to an embodiment;

[0051] Fig. 10 is a perspective view of a second carrier of a camera actuator according to an embodiment;

[0052] Fig. 11 is a perspective view of a camera actuator according to an embodiment, excluding the housing.

[0053] Figure 12 is a drawing taken along line AA' in Figure 11.

[0054] Figure 13 is a drawing taken along line BB' in Figure 11.

[0055] Figure 14 is a drawing taken along the CC' line in Figure 11.

[0056] Fig. 15 is a drawing explaining the operation of a camera actuator according to an embodiment.

[0057] Fig. 16 is a perspective view of a camera actuator according to another embodiment;

[0058] Fig. 17 is an exploded perspective view of a camera actuator according to another embodiment;

[0059] Fig. 18 is a perspective view of a housing of a camera actuator according to another embodiment;

[0060] Fig. 19 is a perspective view of a guide portion of a camera actuator according to another embodiment;

[0061] Fig. 20 is a perspective view of a substrate portion of a camera actuator according to another embodiment;

[0062] Fig. 21 is a top view showing the combined appearance of the housing, guide part, and substrate part in a camera actuator according to another embodiment.

[0063] FIG. 22 is a perspective view of a first carrier of a camera actuator according to another embodiment;

[0064] FIG. 23 is an exploded perspective view of a first carrier of a camera actuator according to another embodiment;

[0065] Fig. 24 is a perspective view of a second carrier of a camera actuator according to another embodiment;

[0066] FIG. 25 is a perspective view of a camera actuator according to another embodiment, excluding the housing;

[0067] Figure 26 is a drawing taken along line DD' in Figure 25.

[0068] Figure 27 is a drawing taken along the line EE' in Figure 25.

[0069] Figure 28 is a drawing taken along the line FF' in Figure 25.

[0070] Figure 29 is a drawing taken along the line GG' in Figure 25.

[0071] Figures 30 and 31 are drawings showing the operating principle of a camera actuator according to another embodiment;

[0072] Fig. 32 is a perspective view of a mobile terminal to which a camera module according to an embodiment is applied.

[0073] Fig. 33 is a perspective view of a vehicle to which a camera module according to an embodiment is applied.

[0074] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0075] However, the technical idea of ​​the present invention is not limited to some of the embodiments described, but can be implemented in various different forms, and within the scope of the technical idea of ​​the present invention, one or more of the components between the embodiments can be selectively combined or substituted for use.

[0076] In addition, terms (including technical and scientific terms) used in the embodiments of the present invention may be interpreted as having a meaning that can be generally understood by a person of ordinary skill in the technical field to which the present invention belongs, unless explicitly and specifically defined and described, and terms that are commonly used, such as terms defined in a dictionary, may be interpreted in consideration of the contextual meaning of the relevant technology.

[0077] Additionally, the terms used in the embodiments of the present invention are intended to describe the embodiments and are not intended to limit the present invention.

[0078] In this specification, the singular may also include the plural unless specifically stated otherwise in the phrase, and when it is described as “A and / or at least one (or more) of B, C”, it may include one or more of all combinations that can be combined with A, B, C.

[0079] Additionally, in describing components of embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used.

[0080] These terms are intended only to distinguish one component from another, and are not intended to limit the nature, order, or sequence of the component.

[0081] And, when a component is described as being 'connected', 'coupled' or 'connected' to another component, it may include not only cases where the component is directly connected, coupled or connected to the other component, but also cases where the component is 'connected', 'coupled' or 'connected' by another component between the component and the other component.

[0082] Additionally, when described as being formed or arranged "above or below" each component, "above" or "below" includes not only cases where the two components are in direct contact with each other, but also cases where one or more other components are formed or arranged between the two components. Furthermore, when expressed as "above" or "below", it can include the meaning of a downward direction as well as an upward direction based on one component.

[0083] FIG. 1 is a perspective view of a camera module including a camera actuator according to an embodiment, and FIG. 2 is an exploded perspective view of the camera actuator according to an embodiment.

[0084] Referring to FIG. 1, a camera module according to an embodiment may include a camera actuator (1000). In addition, the camera module according to an embodiment may further include a camera actuator (1000) and a lens that moves or is moved by the camera actuator (1000). Furthermore, the camera actuator may be used interchangeably with a 'lens transport device', a 'lens driving device', a 'lens moving device', etc. Furthermore, the camera module may be used interchangeably with a camera apparatus, a camera device, an imaging device, an imaging device, an imaging module, etc.

[0085] Additionally, the camera actuator (1000) according to the embodiment may be an AF (Auto Focus) and / or OIS (Optical Image Stabilizer) actuator. For example, the camera actuator (1000) may be an actuator that realizes both AF and OIS. Additionally, the camera actuator (1000) according to the embodiment may be a zoom actuator that additionally performs movement of an additional moving lens group.

[0086] And the camera actuator (1000) according to the embodiment may be a voice coil motor, a micro actuator, a silicon actuator, etc., and may be applied in various ways such as an electrostatic method, a thermal method, a bimorph method, an electrostatic force method, etc., but is not limited thereto. In this embodiment, an actuator using a magnet and a coil is described.

[0087] Additionally, OIS can be used interchangeably with terms such as image stabilization, optical image stabilization, optical image correction, and shake reduction.

[0088] Looking further into FIG. 2, the camera actuator (1000) and camera module according to the embodiment may include a housing (1110), a guide portion (1120), a substrate portion (1130), a first carrier (1140), a second carrier (1150), a stopper (1160), and a cover (1170).

[0089] The housing (1110) may be positioned at the bottom of the camera actuator (1000). The housing (1110) may have a cavity. For example, the housing (1110) may have various shapes. A guide portion (1120), a first carrier (1140), a second carrier (1150), and a stopper (1160) may be arranged in the cavity of the housing (1110). The guide portion (1120), the first carrier (1140), the second carrier (1150), and the stopper (1160) may be sequentially arranged along the optical axis direction. Here, the optical axis direction is the Z-axis direction in the drawing. In addition, the first direction is the X-axis direction in the drawing, and the second direction is the Y-axis direction in the drawing. The first direction and the second direction may be directions perpendicular to the optical axis direction. And the housing (1110) may be a 'fixed part', a 'fixed part', or a 'fixed element' in the camera actuator (1000). That is, the housing (1110) may not move or rotate in the direction of the optical axis or in a direction perpendicular to the optical axis. Accordingly, components connected or coupled to the housing (1110) may also not move or rotate in the direction of the optical axis or in a direction perpendicular to the optical axis.

[0090] The guide portion (1120) may be positioned on the bottom surface of the housing (1110). The guide portion (1120) may be arranged within the housing (1110). The guide portion (1120) may rotate (tilt) in a direction perpendicular to the optical axis direction. The guide portion (1120) may be arranged between the housing (1110) and the first carrier (1140). The guide portion (1120) may include a plurality of protrusions. The guide portion (1120) may be arranged at the bottom of the first carrier (1140) to enable the first carrier (1140) to rotate.

[0091] The substrate portion (1130) may be positioned on the outer surface of the housing (1110). The substrate portion (1130) may be placed in a groove on the outer surface of the housing (1110). The substrate portion (1130) 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), or a rigid-flexible printed circuit board (RigidFlexible PCB). However, the present invention is not limited to these types. The substrate portion (1130) may include a substrate, a coil, and a sensor.

[0092] The first carrier (1140) may be positioned on the guide portion (1120). The first carrier (1140) may rotate on the guide portion (1120) to perform the OIS function. In addition, the first carrier (1140) may be coupled with a second carrier (1150) disposed inside for the AF function. The first carrier (1140) may rotate on the guide portion (1120) by the electromagnetic force of the magnet and the coil. The first carrier (1140) may include a sensor substrate portion, a first holder, a magnet, and a coil.

[0093] The second carrier (1150) may be positioned inside the first carrier (1140). The second carrier (1150) may move along the optical axis direction inside the first carrier (1140). The second carrier (1150) may perform the AF function by moving along the optical axis direction inside the first carrier (1140). The second carrier (1150) may include a lens, a second holder, a magnet, and a ball portion.

[0094] The stopper (1160) can be positioned on the first carrier (1140) and the second carrier (1150). The stopper (1160) can be coupled with the first carrier (1140). The stopper (1160) can fix the second carrier (1150) disposed inside the first carrier (1140) by being coupled with the first carrier (1140) on the upper surface of the first carrier (1140). The stopper (1160) can prevent the second carrier (1150) from being detached from the first carrier (1140) during the process of moving in the optical axis direction.

[0095] The cover (1170) may be positioned in an area (e.g., the outermost area) of the camera actuator (1000) to surround or cover the exterior of the camera actuator (1000). The cover (1170) may block or reduce electromagnetic waves generated from the outside. Accordingly, errors in the operation of the OIS and AF due to the components mounted on the substrate (1130) and the carrier may be reduced. In addition, the cover (1170) may be fitted or aligned with the lower housing (1110) to be fastened.

[0096] FIG. 3 and FIG. 4 are perspective views of a housing of a camera actuator according to an embodiment, FIG. 5 is a perspective view of a guide portion of a camera actuator according to an embodiment, FIG. 6 is a perspective view of a substrate portion of a camera actuator according to an embodiment, and FIG. 7 is a perspective view showing a state in which a housing, a guide portion, and a substrate portion are combined in a camera actuator according to an embodiment.

[0097] Referring to FIGS. 3 and 4, the housing (1110) may include a plurality of sides. The housing (1110) may include a first housing side, a second housing side, and a fourth housing side (1110a, 1110b, 1110c, 1110d). The first housing side (1110a) and the second housing side (1110b) may be arranged to face each other. In addition, the third housing side (1110c) and the fourth housing side (1110d) may be arranged to face each other. The third housing side (1110c) and the fourth housing side (1110d) may be arranged between the first housing side (1110a) and the second housing side (1110b). The first housing side (1110a) and the second housing side (1110b) may be arranged parallel to each other and spaced apart from each other in the second direction. The third housing side (1110c) and the fourth housing side (1110d) can be spaced apart in the first direction and arranged parallel to each other.

[0098] The first housing side (1110a) and the second housing side (1110b) may include openings. The first housing side (1110a) may include a first opening (h1). The second housing side (1110b) may include a second opening (h2). The first opening (h1) and the second opening (h2) may be spaces for arranging magnets of the substrate. The first opening (h1) and the second opening (h2) may overlap each other in the second direction. The first opening (h1) and the second opening (h2) may extend in the first direction. The fourth housing side (1110d) may include a cut portion. The fourth housing side (1110d) may have two parts spaced apart in the second direction with the cut portion therebetween. The connector of the sensor substrate can be extended to the outside through the cut portion of the fourth housing side (1110d). A substrate mounting groove (h) can be located on the outside of the first housing side (1110a), the second housing side (1110b), and the third housing side (1110c). The substrate can be placed in the substrate mounting groove (h).

[0099] A first groove (r1) and a second groove (r2) may be positioned on the bottom surface of the housing (1110). The first groove (r1) and the second groove (r2) may include a shape that is recessed to a certain depth in the direction of the optical axis on the inside of the bottom surface of the housing (1110). A third protrusion and a fourth protrusion of the guide part may be positioned in the first groove (r1) and the second groove (r2), respectively. The first groove (r1) and the second groove (r2) may be spaces in which the third protrusion and the fourth protrusion are seated and rotate. The first groove (r1) and the second groove (r2) may include a plurality of inclined surfaces or flat surfaces. The first groove (r1) and the second groove (r2) may be positioned to be spaced apart from each other in the first direction.

[0100] A support magnet (1110m) may be arranged on the bottom surface of the housing (1110). The support magnet (1110m) may be arranged on the inner side of the bottom surface of the housing (1110). The support magnet (1110m) may be arranged between the first groove (r1) and the second groove (r2). The support magnet (1110m) may support the first carrier in the direction of the optical axis to facilitate rotation of the first carrier.

[0101] Referring to FIG. 5, the guide portion (1120) may include a plurality of protrusions. The guide portion (1120) may include first to fourth protrusions (1120a, 1120b, 1120c, 1120d). The first to fourth protrusions (1120a, 1120b, 1120c, 1120d) may be arranged to protrude outward from a side surface of the guide portion (1120). The first to fourth protrusions (1120a, 1120b, 1120c, 1120d) may be arranged to be adjacent to different side surfaces of the guide portion (1120). The first to fourth protrusions (1120a, 1120b, 1120c, 1120d) may protrude from the body of the guide portion (1120) in the direction of the optical axis. The first protrusion (1120a) and the second protrusion (1120b) may protrude in a direction toward the first carrier. The first protrusion (1120a) and the second protrusion (1120b) may be spaced apart from each other in the second direction. The third protrusion (1120c) and the fourth protrusion (1120d) may protrude in a direction opposite to the first protrusion (1120a) and the second protrusion (1120b). The third protrusion (1120c) and the fourth protrusion (1120d) may protrude in a direction toward the bottom of the housing. The third protrusion (1120c) and the fourth protrusion (1120d) may be spaced apart from each other in the first direction. The guide portion (1120) may include an opening on the inside. The first protrusion (1120a) and the second protrusion (1120b) may support the second-axis rotation of the first carrier. The third protrusion (1120c) and the fourth protrusion (1120d) may support the first-axis rotation of the first carrier.

[0102] Referring to FIG. 6, the substrate portion (1130) may include a first sub-substrate (1130a), a second sub-substrate (1130b), and a third sub-substrate (1130c). The first sub-substrate (1130a), the second sub-substrate (1130b), and the third sub-substrate (1130c) may be connected to each other. The third sub-substrate (1130c) may be disposed between the first sub-substrate (1130a) and the second sub-substrate (1130b). The first sub-substrate (1130a) and the second sub-substrate (1130b) may be disposed parallel to each other and spaced apart from each other in the second direction. The third sub-substrate (1130c) may be disposed perpendicular to the first sub-substrate (1130a) and the second sub-substrate (1130b). The first sub-substrate (1130a) and the second sub-substrate (1130b) can be arranged in a folded form on the third sub-substrate (1130c).

[0103] The substrate portion (1130) may include a plurality of coils. The substrate portion (1130) may include first to fourth coils (c1, c2, c3, c4). The first to fourth coils (c1, c2, c3, c4) may be electrically connected to the substrate portion (1130). The first to fourth coils (c1, c2, c3, c4) may be disposed on the inside of the substrate portion (1130). The first coil (c1) and the second coil (c2) may be disposed on the inside of the first sub-substrate (1130a) of the substrate portion (1130). In addition, the third coil (c3) and the fourth coil (c4) may be disposed on the inside of the second sub-substrate (1130b) of the substrate portion (1130). The first coil (c1) and the second coil (c2) may be disposed in the first direction. The first coil (c1) and the second coil (c2) may be spaced apart from each other by a certain distance in the first direction and may be arranged to overlap each other in the first direction. The first coil (c1) may be arranged further outside the first sub-substrate (1130a) than the second coil (c2). The second coil (c2) may be positioned closer to the third sub-substrate (1130c) than the first coil (c1). The third coil (c3) and the fourth coil (c4) may be arranged in the first direction. The third coil (c3) and the fourth coil (c4) may be spaced apart from each other by a certain distance in the first direction and may be arranged to overlap each other in the first direction. The third coil (c3) may be arranged further outside the second sub-substrate (1130b) than the fourth coil (c4). The fourth coil (c4) may be positioned closer to the third sub-substrate (1130c) than the third coil (c3). The first coil (c1) and the second coil (c2) may be arranged to overlap with the third coil (c3) and the fourth coil (c4) in the second direction. The first coil (c1) may overlap with the third coil (c3) in the second direction. The second coil (c2) may overlap with the fourth coil (c4) in the second direction. The first to fourth coils (c1, c2, c3, c4) may have a circular ring shape including an empty space on the inside.

[0104] The substrate (1130) may include a plurality of sensors. The plurality of sensors may be arranged on the first sub-substrate (1130a) and the second sub-substrate (1130b). The plurality of sensors may be positioned on the inner side of the first to fourth coils (c1, c2, c3, c4), respectively. The plurality of sensors may be positioned to overlap with empty spaces on the inner side of the first to fourth coils (c1, c2, c3, c4), respectively. The sensors may sense the position of the first carrier. The sensors may be position detection sensors (gyro sensors).

[0105] Fig. 7 is a perspective view showing the housing, guide portion, and substrate portion combined in a camera actuator according to an embodiment.

[0106] Referring to FIGS. 3 to 7, a plurality of coils may be positioned within openings in the housing side surfaces. The first coil (c1) and the second coil (c2) may be positioned in the first opening (h1) of the first housing side surface (1110a), and the third coil (c3) and the fourth coil (c4) may be positioned in the second opening (h2) of the second housing side surface (1110b). The first coil (c1) and the second coil (c2) may be positioned to overlap with the first housing side surface (1110a) in the optical axis direction. The third coil (c3) and the fourth coil (c4) may be positioned to overlap with the second housing side surface (1110b) in the optical axis direction. The substrate portion (1130) may be positioned in the substrate mounting groove (h) of the housing (1110).

[0107] The first protrusion (1120a) of the guide portion (1120) may be positioned adjacent to the first housing side (1110a) of the housing (1110), and the second protrusion (1120b) may be positioned adjacent to the second housing side (1110b) of the housing (1110). The third protrusion (1120c) may be positioned adjacent to the third housing side (1110c) of the housing (1110). In addition, the fourth protrusion (1120d) may be positioned adjacent to the fourth housing side (1110d) of the housing (1110). The third protrusion (1120c) may be positioned in the first groove (r1) of the housing (1110), and the fourth protrusion (1120d) may be positioned in the second groove (r2) of the housing (1110). The third protrusion (1120c) can overlap with the first groove (r1) in the optical axis direction, and the fourth protrusion (1120d) can overlap with the second groove (r2) in the optical axis direction.

[0108] The support magnet (1110m) of the housing (1110) may be positioned in an opening inside the guide portion (1120). The support magnet (1110m) may overlap the opening inside the guide portion (1120) in the direction of the optical axis or in a direction perpendicular to the optical axis direction. Since the support magnet (1110m) is positioned in the opening inside the guide portion (1120), the magnetic force of the support magnet (1110m) is not blocked by the guide portion (1120), so that the first carrier can be easily supported.

[0109] FIG. 8 is a perspective view of a first carrier of a camera actuator according to an embodiment, and FIG. 9 is an exploded perspective view of a first carrier of a camera actuator according to an embodiment.

[0110] Referring to FIGS. 8 and 9, the first carrier (1140) may include a sensor substrate portion (1141), a first holder (1142), a first magnet (M1), a second magnet (M2), and an AF substrate portion (1143).

[0111] The sensor substrate (1141) may include an image sensor (IS), a sensor substrate (1141a), a connector (CN), and a support plate (1141b). The sensor substrate (1141) may be disposed at the bottom of the first holder (1142). The sensor substrate (1141a) may be in contact with the bottom surface of the first holder (1142). An image sensor (IS) may be disposed on the sensor substrate (1141a). The image sensor (IS) may be disposed on the sensor substrate (1141a) so as to face the first holder (1142). The image sensor (IS) may be disposed within an opening of the first holder (1142). The image sensor (IS) may receive light passing through a lens and convert an optical signal into an electrical signal. The image sensor (IS) may include various elements that perform this. The image sensor (IS) may receive light incident in the direction of the optical axis. The connector (CN) can be electrically connected to an external device. The sensor substrate (1141) can be electrically connected to an external electronic device through the connector (CN). The support plate (1141b) can be arranged at the bottom of the sensor substrate (1141a). The support plate (1141b) can be arranged in the opposite direction to the image sensor (IS). The support plate (1141b) can be arranged between the support magnet (1110m) of the housing (1110) and the sensor substrate (1141a) to support the sensor substrate (1141a).

[0112] The first holder (1142) may include a cavity. A second carrier may be placed in the cavity of the first holder (1142). The first holder (1142) may support a first magnet (M1), a second magnet (M2), and an AF substrate (1143). The bottom surface of the first holder (1142) may include a substrate mounting groove in which a sensor substrate (1141a) may be placed. In addition, the bottom surface of the first holder (1142) may include a third groove (r3) and a fourth groove (r4). The third groove (r3) and the fourth groove (r4) may be recessed to a certain depth from the outside to the inside of the bottom surface of the first holder (1142). A first protrusion and a second protrusion of the guide portion may be positioned in the third groove (r3) and the fourth groove (r4). The third groove (r3) may be positioned on the side of the first holder (1142a). The fourth groove (r4) may be positioned on the side of the second holder (1142b). In addition, the third groove (r3) and the fourth groove (r4) may be positioned to protrude slightly in the first direction from the bottom surface of the first holder (1142). The third groove (r3) and the fourth groove (r4) may include a plurality of inclined surfaces or flat surfaces. The bottom surface of the first holder (1142) may include an opening in which an image sensor (IS) is positioned.

[0113] The first holder (1142) may include first holder side surfaces to fourth holder side surfaces (1142a, 1142b, 1142c, 1142d). The first holder side surface (1142a) and the second holder side surface (1142b) may be positioned parallel to each other and spaced apart from each other in a second direction. The third holder side surface (1142c) and the fourth holder side surface (1142d) may be positioned between the first holder side surface (1142a) and the second holder side surface (1142b) and may be positioned parallel to each other and spaced apart from each other in the first direction. The first holder side surface (1142a) may be a side adjacent to the first housing side surface. The first holder side surface (1142a) may include a groove in which a first magnet (M1) is positioned. The first magnet (M1) may be positioned on the outside of the first holder side surface (1142a). The second holder side (1142b) may be a side adjacent to the second housing side. The second holder side (1142b) may include a groove in which a second magnet (M2) is disposed. The second magnet (M2) may be disposed on an outer side of the second holder side (1142b). The third holder side (1142c) may be a side adjacent to the third housing side. The third holder side (1142c) may include a groove and an opening in which an AF substrate (1143) is disposed. The AF substrate (1143) may be disposed on an outer side of the third holder side (1142c). In addition, a third rail and a fourth rail along which the ball part moves may be disposed on an inner side of the third holder side (1142c). The third rail and the fourth rail may be formed along the optical axis direction and may overlap the first rail and the second rail in the first direction, respectively.

[0114] A first magnet (M1) and a second magnet (M2) may be arranged on a side surface of a first holder (1142). The first magnet (M1) and the second magnet (M2) may be arranged on a side surface of the first holder (1142) to rotate the first carrier (1140) through an electromagnetic force between the first coil and the second coil. The first magnet (M1) may be located on an outer side surface of the first holder side surface (1142a). The second magnet (M2) may be located on an outer side surface of the second holder side surface (1142b). The first magnet (M1) and the second magnet (M2) may be arranged in parallel and spaced apart from each other in the second direction. The positive poles of the first magnet (M1) and the second magnet (M2) may be arranged in the direction of the optical axis. The first magnet (M1) and the second magnet (M2) can extend in the first direction.

[0115] The AF substrate (1143) may include an AF substrate (1143a), a fifth coil (c5), a yoke (1143b), and an AF sensor (1143c). The AF substrate (1143) may be disposed on the third holder side (1142c). The AF substrate (1143a) may be positioned in a groove of the third holder side (1142c). A fifth coil (c5) may be disposed on the inside of the AF substrate (1143a). The fifth coil (c5) may be disposed within an opening of the third holder side (1142c). The fifth coil (c5) may be an AF coil that moves the second carrier through an electromagnetic force with the third magnet of the second carrier. The yoke (1143b) may be disposed on the outside of the AF substrate (1143a).

[0116] Fig. 10 is a perspective view of a second carrier of a camera actuator according to an embodiment.

[0117] Referring to FIG. 10, the second carrier (1150) may include a lens (LN), a second holder (1151), a third magnet (M3), and a ball (B).

[0118] The second holder (1151) can fix the lens (LN). The second holder (1151) can fix the lens (LN) by surrounding the lens (LN) from the outside of the lens (LN). The second holder (1151) can include a groove in which a third magnet (M3) is disposed, and a first rail and a second rail in which a ball portion (B) is disposed. The first rail and the second rail can be disposed spaced apart from each other in the second direction. The first rail and the second rail can extend along the optical axis direction. The first rail and the second rail can include a plurality of inclined surfaces and flat surfaces. The third magnet (M3) and the ball portion (B) can be disposed on a side adjacent to the third housing side of the second holder (1151). The positive pole of the third magnet (M3) can be disposed in the optical axis direction. The ball portion (B) can include a plurality of balls. A plurality of balls can be arranged along the optical axis direction on the first and second rails. The ball portion (B) can contact the third and fourth rails of the first holder. The ball portion (B) can move between the first and third rails or the second and fourth rails, thereby causing the second carrier (1150) to move in the optical axis direction.

[0119] FIG. 11 is a perspective view of a camera actuator according to an embodiment, excluding the housing, FIG. 12 is a view taken along line AA' in FIG. 11, FIG. 13 is a view taken along line BB' in FIG. 11, and FIG. 14 is a view taken along line CC' in FIG. 11.

[0120] Referring to FIGS. 11 to 14, the first coil (c1) and the second coil (c2) may overlap the first magnet (M1) in the second direction. The first coil (c1) and the second coil (c2) may be disposed on the first housing side (1110a). The first coil (c1) and the second coil (c2) may be disposed adjacent to the first magnet (M1). The first coil (c1) and the second coil (c2) may be disposed adjacent to the first magnet (M1) so that when current flows, an electromagnetic force may be applied to the first magnet (M1). When the direction of the current flowing in the first coil (c1) and the direction of the current flowing in the second coil (c2) are the same, the direction of the force applied to the first magnet (M1) may be the same. When the direction of the current flowing in the first coil (c1) and the direction of the current flowing in the second coil (c2) are opposite, the direction of the force acting on the first magnet (M1) may be opposite. The first magnet (M1) may receive a force in the direction of the optical axis. When the direction of the current flowing in the first coil (c1) and the direction of the current flowing in the second coil (c2) are the same, the first holder side (1142a) of the first carrier (1140) may move in the direction of the optical axis.

[0121] In addition, the third coil (c3) and the fourth coil (c4) may overlap the second magnet (M2) in the second direction. The third coil (c3) and the fourth coil (c4) may be disposed on the second housing side (1110b). The third coil (c3) and the fourth coil (c4) may be disposed adjacent to the second magnet (M2). The third coil (c3) and the fourth coil (c4) may be disposed adjacent to the second magnet (M2) so that when current flows, an electromagnetic force may be applied to the second magnet (M2). When the direction of the current flowing in the third coil (c3) and the direction of the current flowing in the fourth coil (c4) are the same, the direction of the force applied to the second magnet (M2) may be the same. When the direction of the current flowing in the third coil (c3) and the direction of the current flowing in the fourth coil (c4) are opposite, the direction of the force acting on the second magnet (M2) may be opposite. The second magnet (M2) may receive a force in the direction of the optical axis. The third coil (c3) and the fourth coil (c4) may be arranged adjacent to the opposite sides of the first coil (c1) and the second coil (c2) and the first carrier (1140). When the direction of the current flowing in the third coil (c3) and the direction of the current flowing in the fourth coil (c4) are the same, the second carrier side (1140b) of the first carrier (1140) may move in the direction of the optical axis.

[0122] The first coil (c1) and the second coil (c2) may be arranged in the first direction. In addition, the third coil (c3) and the fourth coil (c4) may be arranged in the first direction. The distance between the first coil (c1) and the second coil (c2) in the first direction may be the same as the distance between the third coil (c3) and the fourth coil (c4) in the first direction. Accordingly, the first coil (c1) and the third coil (c3) may overlap in the second direction, and the second coil (c2) and the fourth coil (c4) may overlap in the second direction. The first coil (c1) and the third coil (c3) may be arranged adjacent to the fourth holder side surface (1142d) of the first carrier (1140). Therefore, when the direction of the force that the first coil (c1) exerts on the first magnet (M1) and the direction of the force that the third coil (c3) exerts on the second magnet (M2) are the same, the fourth holder side surface (1142d) of the first carrier (1140) can move in the optical axis direction. The second coil (c2) and the fourth coil (c4) can be arranged adjacent to the third holder side surface (1142c) of the first carrier (1140). Therefore, when the direction of the force that the second coil (c2) exerts on the first magnet (M1) and the direction of the force that the fourth coil (c4) exerts on the second magnet (M2) are the same, the third holder side surface (1142c) of the first carrier (1140) can move in the optical axis direction.

[0123] The camera actuator according to the embodiment includes a first coil (c1), a second coil (c2), a third coil (c3), and a fourth coil (c4) arranged in a first direction, so that the coils can be arranged in four directions based on the two rotation axes of the first carrier. As a result, all four coils can be utilized when driving the OIS of the camera actuator, and thus the driving force can be maximized when driving the OIS. In addition, two coils can be arranged on each of two opposing sides of the camera actuator to increase the separation distance between the coils. Accordingly, the distance between the rotation axis of the first carrier and the point of application of the force can be maximized. As a result, the camera actuator according to the embodiment can increase the OIS tilting driving efficiency with the same current.

[0124] Fig. 15 is a drawing explaining the operation of a camera actuator according to an embodiment.

[0125] Referring to FIGS. 11 to 15, the first carrier (1140) of the camera actuator can rotate around a first axis or a second axis. The first axis may be an axis parallel to the first direction. The second axis may be an axis parallel to the second direction and may be in a direction perpendicular to the first axis.

[0126] Fig. 15a shows a first carrier rotating around a first axis. Referring to Fig. 15a, when the directions of the currents flowing in the first coil (c1) and the second coil (c2) are the same, and the directions of the currents flowing in the third coil (c3) and the fourth coil (c4) are the same, the first carrier (1140) can rotate around the first axis. When the directions of the currents flowing in the first coil (c1) and the second coil (c2) are the same, the first magnet (M1) can receive a force in the direction of the optical axis. As the first magnet (M1) receives a force in the direction of the optical axis, the first holder side surface (1142a) of the first carrier (1140) can receive a force in the direction of the optical axis. In addition, when the directions of the currents flowing in the third coil (c3) and the fourth coil (c4) are the same, the second magnet (M2) can receive a force in the direction of the optical axis. As the second magnet (M2) receives a force in the direction of the optical axis, the second holder side surface (1142b) of the first carrier (1140) may receive a force in the direction of the optical axis. In addition, the direction of the current flowing in the first coil (c1) and the second coil (c2) and the direction of the current flowing in the third coil (c3) and the fourth coil (c4) may be the same. Here, the direction of the current flowing in the coils may be based on the time when all are viewed from the same direction. When the direction of the current flowing in the first coil (c1) and the second coil (c2) and the direction of the current flowing in the third coil (c3) and the fourth coil (c4) are the same, the direction of the force acting on the first magnet (M1) and the second magnet (M2) may be opposite. When the directions of the forces acting on the first magnet (M1) and the second magnet (M2) are opposite, the directions of the forces acting on the first holder side (1142a) and the second holder side (1141b) of the first carrier (1140) are opposite, so that the first carrier (1140) can rotate around the first axis. When the directions of the currents flowing in the first to fourth coils (c1, c2, c3, c4) are opposite, the rotational direction of the first carrier (1140) can be opposite.

[0127] The first axis can overlap with the third protrusion (1120c) and the fourth protrusion (1120d) of the guide portion (1120) in the optical axis direction. As the third protrusion (1120c) and the fourth protrusion (1120d) rotate on the first groove (r1) and the second groove (r2) of the housing (1110), the first carrier (1140) can rotate around the first axis together with the guide portion (1120) on the guide portion (1120). Since the first carrier (1140) rotates around the first axis parallel to the side of the first carrier (1140), the distance between the rotational axis of the first carrier and the point of application of the force can be maximized. Accordingly, the driving efficiency of the camera actuator can be increased with the same current.

[0128] Fig. 15b shows a first carrier rotating around a second axis. Referring to Fig. 15b, when the directions of the currents flowing in the first coil (c1) and the fourth coil (c4) are the same, and the directions of the currents flowing in the second coil (c2) and the third coil (c3) are opposite to the directions of the currents flowing in the first coil (c1) and the fourth coil (c4), the first carrier (1140) can rotate around the second axis. The directions of the currents flowing in the first coil (c1) and the third coil (c3) may be opposite. When the directions of the currents flowing in the first coil (c1) and the third coil (c3) are opposite, the directions of the forces acting on the first magnet (M1) and the second magnet (M2) may be the same. Ultimately, when the directions of the currents flowing in the first coil (c1) and the third coil (c3) are opposite, the fourth holder side surface (1142d) of the first carrier (1140) can receive a force in the direction of the optical axis. The directions of the currents flowing in the second coil (c2) and the fourth coil (c4) can be opposite. When the directions of the currents flowing in the second coil (c2) and the fourth coil (c4) are opposite, the directions of the forces acting on the first magnet (M1) and the second magnet (M2) can be the same. Ultimately, when the directions of the currents flowing in the second coil (c2) and the fourth coil (c4) are opposite, the third holder side surface (1142c) of the first carrier (1140) can receive a force in the direction of the optical axis. When the direction of the current flowing in the first coil (c1) and the fourth coil (c4) and the direction of the current flowing in the second coil (c2) and the third coil (c3) are opposite, the direction of the force acting on the third holder side (1142c) of the first carrier (1140) and the direction of the force acting on the fourth holder side (1142d) become opposite, so that the first carrier (1140) can rotate around the second axis. When the direction of the current flowing in the first to fourth coils (c1, c2, c3, c4) becomes opposite, the rotation direction of the first carrier (1140) can become opposite.

[0129] The second axis may overlap with the first protrusion (1120a) and the second protrusion (1120b) of the guide portion (1120) in the optical axis direction. As the first protrusion (1120a) and the second protrusion (1120b) rotate on the third groove (r3) and the fourth groove (r4) of the first carrier (1140), the first carrier (1140) may rotate around the second axis on the guide portion (1120). As the first carrier (1140) rotates around the second axis parallel to the side of the first carrier (1140), the distance between the rotational axis of the first carrier and the point of application of the force may be maximized. Accordingly, the driving efficiency of the camera actuator may be increased with the same current.

[0130] FIG. 16 is a perspective view of a camera module including a camera actuator according to another embodiment, and FIG. 17 is an exploded perspective view of a camera actuator according to another embodiment.

[0131] Referring to FIG. 16, a camera module according to an embodiment may include a camera actuator (2000). In addition, the camera module according to an embodiment may further include a camera actuator (2000) and a lens that moves or is moved by the camera actuator (2000). Furthermore, the camera actuator may be used interchangeably with a 'lens transport device', a 'lens driving device', a 'lens moving device', etc. Furthermore, the camera module may be used interchangeably with a camera device, a camera device, an imaging device, an imaging device, an imaging module, etc.

[0132] Additionally, the camera actuator (2000) according to the embodiment may be an AF (Auto Focus) and / or OIS (Optical Image Stabilizer) actuator. For example, the camera actuator (2000) may be an actuator that realizes both AF and OIS. Additionally, the camera actuator (2000) according to the embodiment may be a zoom actuator that additionally performs movement of an additional moving lens group.

[0133] And the camera actuator (2000) according to the embodiment may be a voice coil motor, a micro actuator, a silicon actuator, etc., and may be applied in various ways such as an electrostatic method, a thermal method, a bimorph method, an electrostatic force method, etc., but is not limited thereto. In this embodiment, an actuator using a magnet and a coil is described.

[0134] Additionally, OIS can be used interchangeably with terms such as image stabilization, optical image stabilization, optical image correction, and shake reduction.

[0135] Looking further into FIG. 17, the camera actuator (2000) and camera module according to the embodiment may include a housing (2110), a guide portion (2120), a substrate portion (2130), a first carrier (2140), a second carrier (2150), a stopper (2160), and a cover (2170).

[0136] The housing (2110) may be positioned at the bottom of the camera actuator (2000). The housing (2110) may have a cavity. For example, the housing (2110) may have various shapes. A guide portion (2120), a substrate portion (2130), a first carrier (2140), a second carrier (2150), and a stopper (2160) may be arranged in the cavity of the housing (2110). The substrate portion (2130), the guide portion (2120), the first carrier (2140), the second carrier (2150), and the stopper (2160) may be sequentially arranged along the optical axis direction. Here, the optical axis direction is the Z-axis direction in the drawing. In addition, the first direction is the X-axis direction in the drawing, and the second direction is the Y-axis direction in the drawing. The first direction and the second direction may be directions perpendicular to the optical axis direction. And the housing (2110) may be a 'fixed part', a 'fixed part', or a 'fixed element' in the camera actuator (2000). That is, the housing (2110) may not move or rotate in the direction of the optical axis or in a direction perpendicular to the optical axis. Accordingly, components connected or coupled to the housing (2110) may also not move or rotate in the direction of the optical axis or in a direction perpendicular to the optical axis.

[0137] The guide portion (2120) may be positioned between the substrate portion (2130) and the first carrier (2140). The guide portion (2120) may be disposed within the housing (2110). The guide portion (2120) may rotate (tilt) in a direction perpendicular to the optical axis direction. The guide portion (2120) may include a plurality of protrusions. The guide portion (2120) may be disposed below the first carrier (2150) to enable the first carrier (2150) to rotate. The guide portion (2120) may be disposed between the first coil to the fourth coil (c6, c7, c8, c9) and the first carrier (2150).

[0138] The substrate portion (2130) may be positioned on the bottom surface of the housing (2110) within the housing (2110). The substrate portion (2130) may be positioned between the housing (2110) and the guide portion (2120). The substrate portion (2130) 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), or a rigid-flexible printed circuit board (RigidFlexible PCB). However, the present invention is not limited to these types. The substrate portion (2130) may include a substrate, a coil, and a sensor.

[0139] The first carrier (2140) may be positioned on the guide portion (2120). The first carrier (2140) may rotate on the guide portion (2120) to perform the OIS function. In addition, the first carrier (2140) may be coupled with a second carrier (2150) disposed inside for the AF function. The first carrier (2140) may rotate on the guide portion (2120) by the electromagnetic force of the magnet and the coil. The first carrier (2140) may include a sensor substrate portion, a first holder, a magnet, and a spring.

[0140] The second carrier (2150) may be positioned inside the first carrier (2140). The second carrier (2150) may move along the optical axis direction inside the first carrier (2140). The second carrier (2150) may perform an AF function by moving along the optical axis direction inside the first carrier (2140). The second carrier (2150) may include a lens, a second holder, a magnet, and a coil.

[0141] The stopper (2160) can be positioned on the first carrier (2140) and the second carrier (2150). The stopper (2160) can be coupled with the first carrier (2140). The stopper (2160) can fix the second carrier (2150) disposed inside the first carrier (2140) by being coupled with the first carrier (2140) on the upper surface of the first carrier (2140). The stopper (2160) can prevent the second carrier (2150) from being detached from the first carrier (2140) during the process of moving in the optical axis direction.

[0142] The cover (2170) may be positioned in an area (e.g., the outermost area) of the camera actuator (2000) to surround or cover the exterior of the camera actuator (2000). The cover (2170) may block or reduce electromagnetic waves generated from the outside. Accordingly, errors in the operation of the OIS and AF due to the components mounted on the substrate (2130) and the carrier may be reduced. In addition, the cover (2170) may be fitted or aligned with the lower housing (2110) to be fastened.

[0143] FIG. 18 is a perspective view of a housing of a camera actuator according to another embodiment, FIG. 19 is a perspective view of a guide portion of a camera actuator according to another embodiment, and FIG. 20 is a perspective view of a substrate portion of a camera actuator according to another embodiment.

[0144] Referring to FIG. 18, the housing (2110) may include a plurality of sides. The housing (2110) may include a first housing side, a second housing side, and a fourth housing side (2110a, 1110b, 1110c, 1110d). The first housing side (2110a) and the second housing side (2110b) may be arranged to face each other. In addition, the third housing side (2110c) and the fourth housing side (2110d) may be arranged to face each other. The third housing side (2110c) and the fourth housing side (2110d) may be arranged between the first housing side (2110a) and the second housing side (2110b). The first housing side (2110a) and the second housing side (2110b) may be arranged parallel to each other and spaced apart from each other in the second direction. The third housing side (2110c) and the fourth housing side (2110d) can be spaced apart in the first direction and arranged parallel to each other.

[0145] The first housing side (2110a) and the second housing side (2110b) may include grooves on the inside. The grooves on the inside of the first housing side (2110a) and the second housing side (2110b) may have protrusions of the first carrier and the guide portion arranged therein. The fourth housing side (2110d) may include a cut portion. The fourth housing side (2110d) may have two portions spaced apart in the second direction with the cut portion therebetween. The connector of the sensor substrate portion may extend outward through the cut portion of the fourth housing side (2110d).

[0146] A first groove (r5) and a second groove (r6) may be positioned on the bottom surface of the housing (2110). The first groove (r5) and the second groove (r6) may include a shape that is recessed to a certain depth in the direction of the optical axis on the inside of the bottom surface of the housing (2110). A third protrusion and a fourth protrusion of the guide part may be positioned in the first groove (r5) and the second groove (r6), respectively. The first groove (r5) and the second groove (r6) may be a space in which the third protrusion and the fourth protrusion are seated and rotate. The first groove (r5) and the second groove (r6) may include a plurality of inclined surfaces or flat surfaces. The first groove (r5) and the second groove (r6) may be positioned to be spaced apart from each other in the first direction.

[0147] A support magnet (2110m) may be arranged on the bottom surface of the housing (2110). The support magnet (2110m) may be arranged on the inner side of the bottom surface of the housing (2110). The support magnet (2110m) may be arranged between the first groove (r5) and the second groove (r6). The support magnet (2110m) may support the first carrier in the direction of the optical axis to facilitate rotation of the first carrier.

[0148] Referring to FIG. 19, the guide portion (2120) may include a plurality of protrusions. The guide portion (2120) may include first to fourth protrusions (2120a, 2120b, 2120c, 2120d). The first to fourth protrusions (2120a, 2120b, 2120c, 2120d) may be arranged to partially protrude outward from the side surface of the guide portion (2120). The first protrusion (2120a) and the second protrusion (2120b) may extend in a second direction. The first protrusion (2120a) and the second protrusion (2120b) may be arranged in opposite directions of the guide portion (2120) along the second direction. The third protrusion (2120c) and the fourth protrusion (2120d) can extend in the first direction. The third protrusion (2120c) and the fourth protrusion (2120d) can be arranged in opposite directions of the guide portion (2120) along the first direction. The guide portion (2120) can include an opening on the inside. The first protrusion (2120a) and the second protrusion (2120b) can support the second-axis rotation of the first carrier. The third protrusion (2120c) and the fourth protrusion (2120d) can support the first-axis rotation of the first carrier.

[0149] The first protrusion (2120a) and the second protrusion (2120b) may include a first protrusion (2121a) and a second protrusion (2121b) that protrude in the direction of the optical axis, respectively. The first protrusion (2121a) and the second protrusion (2121b) may protrude from the guide portion (2120) in the direction of the optical axis. The first protrusion (2121a) and the second protrusion (2121b) may protrude in a direction toward the first carrier. The first protrusion (2121a) and the second protrusion (2121b) may include a hemispherical shape.

[0150] The third protrusion (2120c) and the fourth protrusion (2120d) may include a third protrusion (2121c) and a fourth protrusion (2121d) that protrude in the direction of the optical axis, respectively. The third protrusion (2121c) and the fourth protrusion (2121d) may protrude from the guide portion (2120) in the direction of the optical axis. The third protrusion (2121c) and the fourth protrusion (2121d) may protrude in a direction opposite to the direction in which the first protrusion (2121a) and the second protrusion (2121b) protrude. The third protrusion (2121c) and the fourth protrusion (2121d) may protrude in a direction toward the bottom surface of the housing. The third protrusion (2121c) and the fourth protrusion (2121d) may include a hemispherical shape.

[0151] Referring to FIG. 20, the substrate portion (2130) may include a substrate (2131) and first to fourth coils (c6, c7, c8, c9). The first to fourth coils (c6, c7, c8, c9) may be electrically connected to the substrate (2131). The first to fourth coils (c6, c7, c8, c9) may be disposed on an upper surface of the substrate (2131). The first to fourth coils (c6, c7, c8, c9) may be disposed to be spaced apart from each other. The first to fourth coils (c6, c7, c8, c9) may be disposed at corner portions of the substrate (2131). The first coil (c6) and the second coil (c7) may be spaced apart in a first direction. The first coil (c6) and the third coil (c8) may be spaced apart in a second direction. The second coil (c7) and the fourth coil (c9) may be spaced apart in the second direction. The third coil (c8) and the fourth coil (c9) may be spaced apart in the first direction. The first to fourth coils (c6, c7, c8, c9) may be arranged symmetrically with respect to the center of the substrate (2130). The distances of the first to fourth coils (c6, c7, c8, c9) from the center of the substrate (2130) may be the same. The first to fourth coils (c6, c7, c8, c9) may have a circular ring shape including an empty space on the inside. The first to fourth coils (c6, c7, c8, c9) may receive current through the substrate (2131). The first to fourth coils (c6, c7, c8, c9) are supplied with current, and the current can flow in a clockwise or counterclockwise direction through the first to fourth coils (c6, c7, c8, c9).

[0152] The substrate (2131) may include a plurality of substrate grooves. The substrate (2131) may include a first substrate groove (2131a), a second substrate groove (2131b), and a third substrate groove (2131c). The first substrate groove (2131a) may be disposed at a center portion of the substrate (2131). A support magnet (2110m) may be disposed in the first substrate groove (2131a). A protrusion of a guide portion (2120) may be disposed in the second substrate groove (2131b) and the third substrate groove (2131c). A fourth protrusion (2121d) of a fourth protrusion (2120d) may be disposed in the second substrate groove (2131b). A third protrusion (2121c) of a third protrusion (2120c) may be disposed in the third substrate groove (2131c).

[0153] The substrate (2130) may include a plurality of sensors. The plurality of sensors may be arranged on the upper surface of the substrate (2131). The plurality of sensors may be positioned on the inner side of each of the first to fourth coils (c6, c7, c8, c9). The plurality of sensors may be positioned to overlap with empty spaces on the inner side of each of the first to fourth coils (c6, c7, c8, c9). The sensor may sense the position of the first carrier. The sensor may be a position detection sensor (gyro sensor).

[0154] Fig. 21 is a top view showing the combined appearance of a housing, a guide portion, and a substrate portion in a camera actuator according to another embodiment.

[0155] Referring to FIGS. 18 to 21, the substrate portion (2130) may be disposed on the bottom surface of the housing (2110). The substrate portion (2130) may be disposed on the bottom surface of the housing (2110) and may be located inside the housing (2110). A portion of the substrate (2131) of the substrate portion (2130) may extend to the outside of the housing (2110) through a cut portion of the fourth housing side surface (2110c). The first coil (c6) and the second coil (c7) may be positioned adjacent to the first housing side surface (2110a). The third coil (c8) and the fourth coil (c9) may be positioned adjacent to the second housing side surface (2110b). The second coil (c7) and the fourth coil (c9) may be positioned adjacent to the third housing side surface (2110c). Additionally, the first coil (c6) and the third coil (c8) may be positioned adjacent to the fourth housing side (2110d). The plurality of sensors (s1, s2, s3, s4) may be positioned on the inner side of the first to fourth coils (c6, c7, c8, c9), respectively.

[0156] The guide portion (2120) may be disposed on the substrate (2131) of the substrate portion (2130). The opening of the guide portion (2120) and the first substrate groove (2131a) of the substrate (2131) may be positioned to overlap in the optical axis direction. The first protrusion (2120a) may be positioned adjacent to the first housing side (2110a). The second protrusion (2120b) may be positioned adjacent to the second housing side (2110b). The third protrusion (2120c) may be positioned adjacent to the third housing side (2110c). The fourth protrusion (2120d) may be positioned adjacent to the fourth housing side (2110d). The guide portion (2120) may be disposed between the first coil to the fourth coil (c6, c7, c8, c9). The first protrusion (2120a) may be positioned between the first coil (c6) and the second coil (c7). The second protrusion (2120b) may be positioned between the third coil (c8) and the fourth coil (c9). The third protrusion (2120c) may be positioned between the second coil (c7) and the fourth coil (c9). The fourth protrusion (2120d) may be positioned between the first coil (c6) and the third coil (c8). The third protrusion (2121c) may be positioned in the first groove (r5) of the housing (2110) through the second substrate groove (2131b). The fourth protrusion (2121d) may be positioned in the second groove (r6) of the housing (2110) through the third substrate groove (2131c).

[0157] The support magnet (2110m) of the housing (2110) may be positioned in an opening inside the guide portion (2120). In addition, the support magnet (2110m) may be positioned in the first substrate groove (2131a). The support magnet (2110m) may overlap the opening inside the guide portion (2120) and the first substrate groove (2131a) in the optical axis direction or in a direction perpendicular to the optical axis direction. Since the support magnet (2110m) is positioned in the opening inside the guide portion (2120), the magnetic force of the support magnet (2110m) is not blocked by the guide portion (2120), so that the first carrier can be easily supported.

[0158] FIG. 22 is a perspective view of a first carrier of a camera actuator according to an embodiment, and FIG. 23 is an exploded perspective view of a first carrier of a camera actuator according to an embodiment.

[0159] Referring to FIGS. 22 and 23, the first carrier (2140) may include a sensor substrate (2141), a first holder (2142), first to fourth magnets (M4, M5, M6, M7), an AF substrate (2143), an upper spring (2144), and a lower spring (2145).

[0160] The sensor substrate (2141) may include an image sensor (IS), a sensor substrate (2141a), a connector (CN), and a support plate (2141b). The sensor substrate (2141) may be disposed at the bottom of the first holder (2142). The sensor substrate (2141a) may be in contact with the bottom surface of the first holder (2142). An image sensor (IS) may be disposed on the sensor substrate (2141a). The image sensor (IS) may be disposed on the sensor substrate (2141a) so as to face the first holder (2142). The image sensor (IS) may receive light passing through a lens and convert the optical signal into an electrical signal. The image sensor (IS) may include various elements that perform this. The image sensor (IS) may receive light incident in the direction of the optical axis. The connector (CN) may be electrically connected to an external device. The sensor substrate (2141) can be electrically connected to an external electronic device via a connector (CN). A support plate (2141b) can be placed on the lower side of the sensor substrate (2141a). The support plate (2141b) can be placed in the opposite direction to the image sensor (IS). The support plate (2141b) can be placed between the support magnet (2110m) of the housing (2110) and the sensor substrate (2141a) to support the sensor substrate (2141a).

[0161] The first holder (2142) may include a cavity. A second carrier may be placed in the cavity of the first holder (2142). The cavity of the first holder (2142) may include first to fourth magnets (M4, M5, M6, M7) and a lower spring (2145). In addition, the first holder (2142) may support the upper spring (2144) and the AF substrate portion (2143). The bottom surface of the first holder (2142) may include a substrate mounting groove in which a sensor substrate (2141a) may be placed. In addition, the bottom surface of the first holder (2142) may include a third groove (r7) and a fourth groove (r8). The third groove (r7) and the fourth groove (r8) may be recessed to a certain depth from the outside to the inside of the bottom surface of the first holder (2142). The first protrusion and the second protrusion of the guide part may be positioned in the third groove (r7) and the fourth groove (r8). The third groove (r7) may be positioned on the first holder side (2142a). The fourth groove (r8) may be positioned on the second holder side (2142b). In addition, the third groove (r7) and the fourth groove (r8) may be positioned to partially protrude in the first direction from the bottom surface of the first holder (2142). The third groove (r7) and the fourth groove (r8) may include a plurality of inclined surfaces or flat surfaces. The first holder (2142) may include a receiving groove in which the first magnet to the fourth magnet (M4, M5, M6, M7) are positioned.

[0162] The first holder (2142) may include first holder side surfaces to fourth holder side surfaces (2142a, 2142b, 2142c, 2142d). The first holder side surface (2142a) and the second holder side surface (2142b) may be positioned parallel to each other and spaced apart from each other in a second direction. The third holder side surface (2142c) and the fourth holder side surface (2142d) may be positioned between the first holder side surface (2142a) and the second holder side surface (2142b) and may be positioned parallel to each other and spaced apart from each other in the first direction. The first holder side surface (2142a) may be a side adjacent to the first housing side surface. The second holder side surface (2142b) may be a side adjacent to the second housing side surface. The third holder side surface (2142c) may be a side adjacent to the third housing side surface. The third holder side (2142c) may include a groove and an opening in which an AF substrate (2143) is disposed. The AF substrate (2143) may be disposed on the outer side of the third holder side (2142c). A first magnet (M4) may be disposed between the first holder side (2142a) and the fourth holder side (2142d). A second magnet (M5) may be disposed between the first holder side (2142a) and the third holder side (2142c). A third magnet (M6) may be disposed between the second holder side (2142b) and the fourth holder side (2142d). A fourth magnet (M7) may be disposed between the second holder side (2142b) and the third holder side (2142c).

[0163] The first to fourth magnets (M4, M5, M6, M7) may be placed in the cavity of the first holder (2142). The first to fourth magnets (M4, M5, M6, M7) may be placed inside the first holder (2142) to rotate the first carrier (2140) through an electromagnetic force with the coil. The first magnet (M4) may be positioned at a first corner of the first holder (2142) located between the first holder side (2142a) and the fourth holder side (2142d). The second magnet (M5) may be positioned at a second corner of the first holder (2142) located between the first holder side (2142a) and the third holder side (2142c). The third magnet (M6) may be positioned at the third corner of the first holder (2142) located between the second holder side (2142b) and the fourth holder side (2142d). The fourth magnet (M7) may be positioned at the fourth corner of the first holder (2142) located between the second holder side (2142b) and the third holder side (2142c). The first magnet (M4) and the second magnet (M5) may be spaced apart from each other in the first direction. The third magnet (M6) and the fourth magnet (M7) may be spaced apart from each other in the first direction. The first magnet (M4) and the third magnet (M6) may be spaced apart from each other in the second direction. The second magnet (M5) and the fourth magnet (M7) may be spaced apart from each other in the second direction. The first to fourth magnets (M4, M5, M6, M7) may be arranged so that their poles are aligned in the direction of the optical axis. The direction in which the poles of the first to fourth magnets (M4, M5, M6, M7) are arranged may be the same.

[0164] The AF substrate (2143) may include an AF substrate and an AF sensor. The AF substrate (2143) may be disposed on the third holder side (2142c). The AF substrate may be positioned in a groove of the third holder side (2142c). The AF sensor may sense a position according to the AF operation of the second carrier. The AF sensor may overlap with the fifth magnet of the second carrier in the first direction.

[0165] The upper spring (2144) may be disposed on the upper surface side of the first holder (2142). In addition, the lower spring (2145) may be disposed on the lower surface side of the first holder (2142). The upper spring (2144) and the lower spring (2145) may be coupled to the first carrier (2140) and the second carrier (2150). The upper spring (2144) and the lower spring (2145) may elastically support the carrier. The upper spring (2144) and the lower spring (2145) may have elasticity in at least a portion. The upper spring (2144) and the lower spring (2145) may movably support the second carrier (2150) when the AF is driven. The upper spring (2144) and the lower spring (2145) may be formed as a plate spring.

[0166] FIG. 24 is a perspective view of a second carrier of a camera actuator according to another embodiment.

[0167] Referring to FIG. 24, the second carrier (2150) may include a lens (LN), a second holder (2151), a fifth magnet (M8), and a fifth coil (c10).

[0168] The second holder (2151) can fix the lens (LN). The second holder (2151) can fix the lens (LN) by surrounding the lens (LN) from the outside of the lens (LN). The second holder (2151) can include a groove in which a fifth magnet (M8) is placed and a groove in which a fifth coil is placed. The fifth magnet (M8) can be placed on a side adjacent to the third housing side of the second holder (2151). The positive pole of the fifth magnet (M8) can be placed in the direction of the optical axis. The fifth magnet (M8) can be placed adjacent to the AF sensor to sense the position of the second carrier (2150) according to the AF operation of the second carrier (2150). The fifth coil (c10) can be placed along the periphery of the side of the second holder (2151). The fifth coil (c10) can be placed in a groove located on the side of the second holder (2151). The fifth coil (c10) can cause the second carrier (2150) to move in the direction of the optical axis through an electromagnetic force with the first magnet to the fourth magnet.

[0169] FIG. 25 is a perspective view of a camera actuator according to another embodiment, excluding the housing, FIG. 26 is a view taken along the line DD' in FIG. 25, FIG. 27 is a view taken along the line EE' in FIG. 25, FIG. 28 is a view taken along the line FF' in FIG. 25, and FIG. 29 is a view taken along the line GG' in FIG. 25.

[0170] Referring to FIGS. 25 to 29, the first to fourth magnets (M4, M5, M6, M7) may overlap with the first to fourth coils (c6, c7, c8, c9) in the optical axis direction. The first magnet (M4) may overlap with the first coil (c6) in the optical axis direction. The second magnet (M5) may overlap with the second coil (c7) in the optical axis direction. The third magnet (M6) may overlap with the third coil (c8) in the optical axis direction. The fourth magnet (M7) may overlap with the fourth coil (c9) in the optical axis direction. The first to fourth magnets (M4, M5, M6, M7) are arranged to overlap with the first to fourth coils (c6, c7, c8, c9) in the optical axis direction, respectively, so that when current flows through the coils, the magnets can receive an electromagnetic force. The first to fourth magnets (M4, M5, M6, M7) can receive a force in the direction of the optical axis. If the direction of the current flowing in the coil is the same, the direction of the force acting on each magnet can be the same.

[0171] The first magnet (M4) and the second magnet (M5) may be arranged adjacent to the first housing side (2110a). The third magnet (M6) and the fourth magnet (M7) may be arranged adjacent to the second housing side (2110b). The first magnet (M4) and the third magnet (M6) may be arranged adjacent to the fourth housing side (2110d). The second magnet (M5) and the fourth magnet (M7) may be arranged adjacent to the third housing side (2110c).

[0172] When the direction of the current flowing in the first coil (c6) and the direction of the current flowing in the second coil (c7) are the same, the direction of the force that the first coil (c6) exerts on the first magnet (M4) and the direction of the force that the second coil (c7) exerts on the second magnet (M5) may be the same. When the direction of the current flowing in the first coil (c6) and the direction of the current flowing in the second coil (c7) are opposite, the direction of the force that the first coil (c6) exerts on the first magnet (M4) and the direction of the force that the second coil (c7) exerts on the second magnet (M5) may be opposite. The first magnet (M4) and the second magnet (M5) may receive forces in the direction of the optical axis. When the direction of the current flowing in the first coil (c6) and the direction of the current flowing in the second coil (c7) are the same, the first holder side (2142a) of the first carrier (2140) can move in the direction of the optical axis.

[0173] When the direction of the current flowing in the third coil (c8) and the direction of the current flowing in the fourth coil (c9) are the same, the direction of the force that the third coil (c8) exerts on the third magnet (M6) and the direction of the force that the fourth coil (c9) exerts on the fourth magnet (M7) may be the same. When the direction of the current flowing in the third coil (c8) and the direction of the current flowing in the fourth coil (c9) are opposite, the direction of the force that the third coil (c8) exerts on the third magnet (M6) and the direction of the force that the fourth coil (c9) exerts on the fourth magnet (M7) may be opposite. The third magnet (M6) and the fourth magnet (M7) may receive forces in the direction of the optical axis. The third coil (c8) and the fourth coil (c9) may be arranged adjacent to the first coil (c6) and the second coil (c7) and the opposite side of the first carrier (2140). When the direction of the current flowing in the third coil (c8) and the direction of the current flowing in the fourth coil (c9) are the same, the second holder side (2142b) of the first carrier (2140) can move in the direction of the optical axis.

[0174] The first coil (c6) and the second coil (c7) may be arranged in the first direction. In addition, the third coil (c8) and the fourth coil (c9) may be arranged in the first direction. The distance between the first coil (c6) and the second coil (c7) in the first direction may be the same as the distance between the third coil (c8) and the fourth coil (c9) in the first direction. Accordingly, the first coil (c6) and the third coil (c8) may overlap in the second direction, and the second coil (c7) and the fourth coil (c9) may overlap in the second direction. The first coil (c6) and the third coil (c8) may be arranged adjacent to the fourth holder side surface (2142d) of the first carrier (2140). Therefore, when the direction of the force that the first coil (c6) exerts on the first magnet (M4) and the direction of the force that the third coil (c8) exerts on the second magnet (M5) are the same, the fourth holder side surface (2142d) of the first carrier (2140) can move in the optical axis direction. The second coil (c7) and the fourth coil (c9) can be arranged adjacent to the third holder side surface (2142c) of the first carrier (2140). Therefore, when the direction of the force that the second coil (c7) exerts on the first magnet (M4) and the direction of the force that the fourth coil (c9) exerts on the second magnet (M5) are the same, the third holder side surface (2142c) of the first carrier (2140) can move in the optical axis direction.

[0175] According to the embodiment, the camera actuator includes a first coil (c6), a second coil (c7), a third coil (c8), and a fourth coil (c9) arranged in a first direction, so that the coils can be arranged in four directions based on the two rotation axes of the first carrier. As a result, all four coils can be utilized when driving the OIS of the camera actuator, and thus the driving force can be maximized when driving the OIS. In addition, accordingly, the distance between the rotation axis of the first carrier and the point of application of force can be maximized. As a result, the camera actuator according to the embodiment can increase the OIS tilting driving efficiency with the same current. In addition, by arranging the first to fourth coils (c6, c7, c8, c9) on the bottom surface of the housing of the camera actuator, even if the distance between the coils and the magnets increases when the carrier is tilted, the tilt driving force can be prevented from decreasing because the distance between the coils and the magnets on the opposite side becomes closer.

[0176] Figures 30 and 31 are drawings showing the operating principle of a camera actuator according to another embodiment.

[0177] Referring to FIGS. 25 to 31, the first carrier (2140) of the camera actuator can rotate around a first axis or a second axis. The first axis may be an axis parallel to the first direction. The second axis may be an axis parallel to the second direction and may be in a direction perpendicular to the first axis.

[0178] Fig. 30a shows a first carrier rotating around a first axis. Referring to Fig. 30a, when the directions of the currents flowing in the first coil (c6) and the second coil (c7) are the same, and the directions of the currents flowing in the third coil (c8) and the fourth coil (c9) are opposite to the directions of the currents flowing in the first coil (c6) and the second coil (c7), the first carrier (2140) can rotate around the first axis. When the directions of the currents flowing in the first coil (c6) and the second coil (c7) are the same, the first magnet (M4) and the second magnet (M5) can receive a force in the optical axis direction. As the first magnet (M4) and the second magnet (M5) receive a force in the optical axis direction, the first holder side surface (2142a) of the first carrier (2140) can receive a force in the optical axis direction. In addition, when the directions of the currents flowing in the third coil (c8) and the fourth coil (c9) are the same, the third magnet (M6) and the fourth magnet (M7) can receive a force in the direction of the optical axis. As the second magnet (M5) receives a force in the direction of the optical axis, the second holder side (2142b) of the first carrier (2140) can receive a force in the direction of the optical axis. In addition, the directions of the currents flowing in the first coil (c6) and the second coil (c7) and the directions of the currents flowing in the third coil (c8) and the fourth coil (c9) can be opposite directions. Here, the directions of the currents flowing in the coils can be based on when all are viewed from the same direction. When the direction of the current flowing in the first coil (c6) and the second coil (c7) and the direction of the current flowing in the third coil (c8) and the fourth coil (c9) are opposite, the direction of the force acting on the first magnet (M4) and the second magnet (M5) and the direction of the force acting on the third magnet (M6) and the fourth magnet (M7) may be opposite.When the direction of the force acting on the first magnet (M4) and the second magnet (M5) and the direction of the force acting on the third magnet (M6) and the fourth magnet (M7) are opposite, the direction of the force acting on the first holder side (2142a) and the second holder side (2141b) of the first carrier (2140) becomes opposite, so that the first carrier (2140) can rotate around the first axis. When the direction of the current flowing in the first coil to the fourth coil (c6, c7, c8, c9) becomes opposite, the direction of rotation around the first axis of the first carrier (2140) can become opposite.

[0179] The first axis can overlap with the third protrusion (2120c) and the fourth protrusion (2120d) of the guide portion (2120) in the optical axis direction. As the third protrusion (2120c) and the fourth protrusion (2120d) rotate on the first groove (r5) and the second groove (r6) of the housing (2110), the first carrier (2140) can rotate around the first axis together with the guide portion (2120) on the guide portion (2120). Since the first carrier (2140) rotates around the first axis parallel to the side of the first carrier (2140), the distance between the rotational axis of the first carrier and the point of application of the force can be maximized. Accordingly, the driving efficiency of the camera actuator can be increased with the same current.

[0180] Fig. 30b shows a first carrier rotating around a second axis. Referring to Fig. 30b, when the directions of the currents flowing in the first coil (c6) and the third coil (c8) are the same, and the directions of the currents flowing in the second coil (c7) and the fourth coil (c9) are opposite to the directions of the currents flowing in the first coil (c6) and the third coil (c8), the first carrier (2140) can rotate around the second axis. The directions of the currents flowing in the first coil (c6) and the third coil (c8) may be the same. When the directions of the currents flowing in the first coil (c6) and the third coil (c8) are the same, the directions of the forces acting on the first magnet (M4) and the third magnet (M6) may be the same. Ultimately, when the directions of the currents flowing in the first coil (c6) and the third coil (c8) are the same, the fourth holder side surface (2142d) of the first carrier (2140) can receive a force in the direction of the optical axis. The directions of the currents flowing in the second coil (c7) and the fourth coil (c9) can be the same. When the directions of the currents flowing in the second coil (c7) and the fourth coil (c9) are the same, the directions of the forces acting on the second magnet (M5) and the fourth magnet (M7) can be the same. Ultimately, when the directions of the currents flowing in the second coil (c7) and the fourth coil (c9) are the same, the third holder side surface (2142c) of the first carrier (2140) can receive a force in the direction of the optical axis. When the direction of the current flowing in the first coil (c6) and the third coil (c8) and the direction of the current flowing in the second coil (c7) and the fourth coil (c9) are opposite, the direction of the force acting on the third holder side (2142c) of the first carrier (2140) and the direction of the force acting on the fourth holder side (2142d) are opposite, so that the first carrier (2140) can rotate around the second axis. When the directions of the current flowing in the first to fourth coils (c6, c7, c8, c9) are opposite, the rotation direction of the first carrier (2140) can be opposite.

[0181] The second axis can overlap with the first protrusion (2120a) and the second protrusion (2120b) of the guide portion (2120) in the optical axis direction. As the first protrusion (2120a) and the second protrusion (2120b) rotate on the third groove (r7) and the fourth groove (r8) of the first carrier (2140), the first carrier (2140) can rotate around the second axis on the guide portion (2120). As the first carrier (2140) rotates around the second axis parallel to the side of the first carrier (2140), the distance between the rotational axis of the first carrier and the point of application of the force can be maximized. Accordingly, the driving efficiency of the camera actuator can be increased with the same current.

[0182] Referring to FIG. 31, by arranging the first to fourth coils on the bottom surface of the housing of the camera actuator, even if the distance between the coils and the magnets increases when the carrier is tilted, the distance between the coils and the magnets on the opposite sides becomes closer, thereby preventing a decrease in the tilt driving force. When the first carrier rotates around the second axis, the first magnet (M4) and the second magnet (M5) can move in opposite directions along the optical axis direction. When the first magnet (M4) rises, the second magnet (M5) can descend, and when the first magnet (M4) descends, the second magnet (M5) can rise. In this case, when the optical axis-wise separation distance between the first magnet (M4) and the first coil increases, the optical axis-wise separation distance between the second magnet (M5) and the second coil may decrease, and when the optical axis-wise separation distance between the first magnet (M4) and the first coil decreases, the optical axis-wise separation distance between the second magnet (M5) and the second coil may increase. Consequently, even if the distance between the coil and the magnet increases when the carrier is tilted, the total tilt driving force may not decrease because the distance between the coil and the magnet on the opposite side becomes closer.

[0183] Fig. 32 is a perspective view of a mobile terminal to which a camera module according to an embodiment is applied.

[0184] As illustrated in FIG. 32, the mobile terminal (1) of the embodiment may include a camera module (3000), a flash module (3010), and an autofocus device (3020) provided on the rear.

[0185] The camera module (3000) may include an image capturing function and an autofocus function. For example, the camera module (3000) may include an autofocus function using an image.

[0186] The camera module (3000) processes still or moving image frames obtained by the image sensor in shooting mode or video call mode.

[0187] The processed image frame can be displayed on a predetermined display unit and stored in memory. A camera (not shown) may also be placed on the front of the mobile terminal body.

[0188] For example, the camera module (3000) may include a first camera module (3000A) and a second camera module (3000B), and OIS may be implemented together with the AF function by the first camera module (3000A).

[0189] The flash module (3010) may include a light-emitting element that emits light internally. The flash module (3010) may be operated by the camera operation of the mobile terminal or by the user's control.

[0190] The autofocus device (3020) may include one of the packages of surface-emitting laser devices as a light-emitting unit.

[0191] The autofocus device (3020) may include an autofocus function using a laser. The autofocus device (3020) may be primarily used in conditions where the autofocus function using the image of the camera module (3000) is degraded, such as at close ranges of 10 m or less or in dark environments.

[0192] The autofocus device (3020) may include a light emitting unit including a vertical cavity surface emitting laser (VCSEL) semiconductor element and a light receiving unit that converts light energy into electrical energy, such as a photodiode.

[0193] Fig. 33 is a perspective view of a vehicle to which a camera module according to an embodiment is applied.

[0194] For example, FIG. 33 is an exterior view of a vehicle equipped with a vehicle driving assistance device to which a camera module according to an embodiment is applied.

[0195] Referring to FIG. 33, the vehicle (700) of the embodiment may be equipped with wheels (13FL, 13FR) that rotate by a power source and a predetermined sensor. The sensor may be a camera sensor (4000), but is not limited thereto.

[0196] The camera sensor (4000) may be a camera sensor to which a camera module according to an embodiment is applied. The vehicle (700) of the embodiment can obtain image information through the camera sensor (4000) that captures a forward image or a surrounding image, and can use the image information to determine a lane non-identification situation and create a virtual lane when the lane is not identified.

[0197] For example, a camera sensor (4000) can capture the front of a vehicle (700) to obtain a front image, and a processor (not shown) can analyze an object included in the front image to obtain image information.

[0198] For example, if objects such as a center divider, curb, or street tree, which correspond to a lane, adjacent vehicle, traffic obstruction, or indirect road marking, are captured in an image captured by a camera sensor (4000), the processor can detect these objects and include them in the image information. At this time, the processor can obtain distance information from the object detected through the camera sensor (4000) to further supplement the image information.

[0199] The image information may be information about an object captured in the image. The camera sensor (4000) may include an image sensor and an image processing module.

[0200] The camera sensor (4000) can process still images or moving images obtained by an image sensor (e.g., CMOS or CCD).

[0201] The image processing module can process still images or videos acquired through an image sensor, extract necessary information, and transmit the extracted information to the processor.

[0202] At this time, the camera sensor (4000) may include a stereo camera to improve the measurement accuracy of the object and to secure more information such as the distance between the vehicle (700) and the object, but is not limited thereto.

[0203] Although the above description focuses on examples, these are merely examples and do not limit the present invention. Those skilled in the art will appreciate that various modifications and applications not exemplified above are possible without departing from the essential characteristics of the present invention. For example, each component specifically shown in the examples can be modified and implemented. In addition, differences related to such modifications and applications should be construed as being included within the scope of the present invention defined in the appended claims.

Claims

1. Housing; A first carrier disposed inside the housing; A second carrier disposed inside the first carrier and movable in the optical axis direction; It includes a first coil and a second coil arranged on the first side of the housing, and a third coil and a fourth coil arranged on the second side of the housing facing the first side; A camera actuator wherein the first coil and the second coil are arranged in a first direction perpendicular to the optical axis direction, and the third coil and the fourth coil are arranged in the first direction.

2. In paragraph 1, It includes a first magnet and a second magnet respectively arranged on two opposing sides of the first carrier, The first magnet is adjacent to the first side of the housing, The second magnet is a camera actuator adjacent to the second side of the housing.

3. In paragraph 2, The first magnet overlaps the first coil and the second coil in the second direction, The second magnet overlaps the third coil and the fourth coil in the second direction, A camera actuator in which the second direction is a direction perpendicular to the optical axis direction and the first direction.

4. In paragraph 3, The first coil overlaps the third coil in the second direction, A camera actuator in which the second coil overlaps the fourth coil in the second direction.

5. In paragraph 4, The first carrier is a camera actuator that rotates around a first axis parallel to the first direction or a second axis parallel to the second direction.

6. In paragraph 5, A camera actuator in which the first carrier rotates around the first axis when the directions of the current flowing in the first coil and the second coil are the same and the directions of the current flowing in the third coil and the fourth coil are the same.

7. In paragraph 5, A camera actuator in which the first carrier rotates around the second axis when the direction of the current flowing in the first coil and the fourth coil is the same and the direction of the current flowing in the second coil and the third coil is opposite to the direction of the current flowing in the first coil and the fourth coil.

8. In paragraph 1, The housing includes a third side disposed between the first side and the second side, A camera actuator comprising a fifth coil disposed on a side of the first carrier adjacent to the third side of the housing.

9. In paragraph 8, A camera actuator wherein the second carrier includes a third magnet disposed on a side adjacent to the third side.

10. In paragraph 9, A camera actuator in which the fifth coil and the third magnet overlap in the first direction.

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