Camera actuator and camera module comprising same

Abstract

An embodiment provides a camera actuator comprising: a housing; a mover disposed in the housing; a prism which is disposed on the mover and on which light is incident in a first direction; and a first driving unit for driving the mover, wherein: the first driving unit includes a coil unit including a plurality of coils and a magnet unit including a plurality of magnets; the magnet unit includes a first magnet and a second magnet spaced apart from each other in a second direction perpendicular to the first direction; the first magnet and the second magnet have polar arrangement directions on mutually facing surfaces, the arrangement directions being perpendicular to each other; and the first direction (Z-axis) is a direction perpendicular to a surface of the prism on which light is incident.

Description

Camera actuator and camera module including the same

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

[0002] A camera is a device that captures subjects in photos or videos, and it is mounted on portable devices, drones, vehicles, etc. To improve image quality, camera modules may feature Image Stabilization (IS) to correct or prevent image shake caused by user movement, Auto Focusing (AF) to automatically adjust the distance between the image sensor and the lens to align the lens focal length, and Zooming to increase or decrease the magnification of distant subjects using a zoom lens.

[0003] Meanwhile, as image sensors increase in pixel count, the resolution rises and the size of the pixels decreases; consequently, as pixels become smaller, the amount of light received over the same period of time decreases. Therefore, in high-pixel cameras, image blur caused by hand shake resulting from slow shutter speeds in dark environments can appear more severe. A representative example of image stabilization (IS) technology is optical image stabilization (OIS), which corrects motion by changing the path of light.

[0004] If the center of the optical axis and the center of the rotation axis of the prism performing OIS are different, distortion of the light received by the image sensor may occur, potentially reducing driving efficiency. In this case, a structure capable of aligning the optical axis and the rotation axis is required to satisfy optical performance. Additionally, a structure is needed to prevent eccentricity of the center of gravity during OIS operation.

[0005] An embodiment provides a camera actuator with improved optical performance and a camera module including the same.

[0006] In addition, a camera actuator with increased driving efficiency and driving stability and a camera module including the same are provided.

[0007] In addition, a camera actuator capable of achieving miniaturization and a camera module including the same are provided.

[0008] In addition, a camera actuator capable of preventing eccentricity of the center of gravity and a camera module including the same are provided.

[0009] In addition, a camera actuator capable of performing 3-axis tilt and a camera module including the same are provided.

[0010] In addition, a camera actuator capable of preventing unnecessary operation and a camera module including the same are provided.

[0011] The problem to be solved in the embodiments is not limited thereto, and may also include the purpose or effect that can be identified from the means of solving the problem or the form of implementation described below.

[0012] A camera actuator according to an embodiment comprises a housing; a mover disposed within the housing; a prism disposed on the mover and into which light is incident in a first direction; and a first driving unit for driving the mover, wherein the first driving unit comprises a coil unit comprising a plurality of coils and a magnet unit comprising a plurality of magnets, wherein the magnet unit comprises a first magnet and a second magnet spaced apart in a second direction perpendicular to the first direction, and wherein the arrangement direction of the positive poles of the first magnet and the second magnet on mutually opposing surfaces is perpendicular to each other, and the first direction (Z-axis) may be a direction perpendicular to the surface into which light is incident on the prism.

[0013] The first magnet includes a first sub-magnet and a second sub-magnet spaced apart in the first direction, and the second magnet may include a third sub-magnet and a fourth sub-magnet spaced apart in a third direction perpendicular to the first direction and the second direction.

[0014] The positive electrodes of the first to fourth sub-magnets can be arranged in the second direction.

[0015] The first magnet includes a first void disposed between the first sub-magnet and the second sub-magnet, and the second magnet may include a second void disposed between the third sub-magnet and the fourth sub-magnet.

[0016] The width of the first magnet and the second magnet in the first direction is the same, and the width of the first magnet and the second magnet in the third direction may be the same.

[0017] The above coil portion includes a first coil facing the first magnet and a second coil facing the second magnet, and the long axis of the first coil may be arranged in the third direction, and the long axis of the second coil may be arranged in the first direction.

[0018] The above magnet portion includes a third magnet, and the third magnet can overlap with the mover in the first direction.

[0019] The above mover can rotate around a first axis parallel to the first direction, a second axis parallel to the second direction, and a third axis parallel to the third direction.

[0020] The above-mentioned mover rotates around the third axis by the electromagnetic force of the first magnet and the first coil, and the above-mentioned mover can rotate around the first axis by the electromagnetic force of the second magnet and the second coil.

[0021] The coil portion includes a third coil facing the third magnet, and the mover can rotate around the second axis by means of the electromagnetic force of the third magnet and the third coil.

[0022] The first driving unit includes a sensor unit that senses the rotation of the mover, and the sensor unit may include a first sensor unit disposed in the inner groove of the first coil and a second sensor unit disposed in the inner groove of the second coil.

[0023] The first sensor unit can sense rotation around the third axis of the mover, and the second sensor unit can sense rotation around the first axis of the mover.

[0024] The sensor unit includes a third sensor unit disposed in the inner groove of the third coil, and the third sensor unit can sense rotation around the second axis of the mover.

[0025] The first to third coils can each be driven independently, and the first to third sensor units can each be driven independently.

[0026] A camera actuator according to an embodiment includes a sub-housing coupled to the housing; a first member coupled to the mover; and a spring portion disposed between the sub-housing and the first member, wherein the spring portion may overlap with the sub-housing and the first member in the third direction.

[0027] The above spring portion may include a first spring and a second spring spaced apart in the second direction, and a third spring and a fourth spring spaced apart in the first direction from the first spring and the second spring, respectively.

[0028] According to an embodiment, the embodiment may provide a camera actuator with improved optical performance and a camera module including the same.

[0029] In addition, a camera actuator with increased driving efficiency and driving stability and a camera module including the same can be provided.

[0030] In addition, a camera actuator capable of achieving miniaturization and a camera module including the same can be provided.

[0031] In addition, a camera actuator capable of preventing eccentricity of the center of gravity and a camera module including the same can be provided.

[0032] In addition, a camera actuator capable of performing 3-axis tilt and a camera module including the same can be provided.

[0033] In addition, a camera actuator capable of preventing unnecessary operation and a camera module including the same can be provided.

[0034] The various and beneficial advantages and effects of the present invention are not limited to those described above and may be more easily understood in the process of explaining specific embodiments of the present invention.

[0035] FIG. 1 is a perspective view of a camera module according to an embodiment, and

[0036] FIG. 2 is an exploded perspective view of a camera module according to an embodiment, and

[0037] FIG. 3 is a cross-sectional view of a camera module cut along AA' in FIG. 1, and

[0038] FIG. 4 is a perspective view of a camera actuator according to an embodiment, and

[0039] FIG. 5 is an exploded perspective view of a camera actuator according to an embodiment, and

[0040] FIG. 6 is a cross-sectional view of the cross section cut at BB' in FIG. 4, and

[0041] FIG. 7 is a cross-sectional view of the cross section cut at CC' in FIG. 4, and

[0042] FIG. 8 is a perspective view of a housing and a sub-housing of a camera actuator according to an embodiment, and

[0043] FIGS. 9 to 11 are perspective views of a mover, a magnet part, and a sub-housing of a camera actuator according to an embodiment, and

[0044] FIG. 12 is a front view of a mover, a magnet part, and a sub-housing of a camera actuator according to an embodiment, and

[0045] FIG. 13 is a perspective view of a magnet portion of a camera actuator according to an embodiment, and

[0046] FIG. 14 is a perspective view of the magnet portion and the substrate portion of a camera actuator according to an embodiment, and

[0047] FIG. 15 is a front view of the magnet portion and the substrate portion of a camera actuator according to an embodiment, and

[0048] FIG. 16 is a top view of the magnet portion and the substrate portion of a camera actuator according to an embodiment, and

[0049] FIG. 17 is a cross-sectional view of a camera actuator according to another embodiment, and

[0050] FIG. 18 is a cross-sectional view of a camera actuator according to another embodiment, and

[0051] FIG. 19 is a drawing for explaining the spring portion of a camera actuator according to an embodiment, and

[0052] FIG. 20 is a perspective view of a camera actuator according to various embodiments, and

[0053] FIG. 21 is a perspective view of a mobile terminal having a camera module applied according to an embodiment, and

[0054] FIG. 22 is a perspective view of a vehicle with a camera module applied according to an embodiment.

[0055] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

[0056] However, the technical concept of the present invention is not limited to some of the described embodiments but can be implemented in various different forms, and within the scope of the technical concept of the present invention, one or more of the components among the embodiments may be selectively combined or substituted.

[0057] In addition, terms used in the embodiments of the present invention (including technical and scientific terms) may be interpreted in a sense that is generally understood by those skilled in the art to which the present invention belongs, unless explicitly and specifically defined otherwise. Terms that are commonly used, such as terms defined in advance, may be interpreted in consideration of their meaning in the context of the relevant technology.

[0058] Furthermore, the terms used in the embodiments of the present invention are for the purpose of describing the embodiments and are not intended to limit the present invention.

[0059] In this specification, the singular form may include the plural form unless specifically stated otherwise in the text, and when described as "at least one of A and B and C (or more than one)," it may include one or more of all combinations that can be formed from A, B, and C.

[0060] In addition, terms such as first, second, A, B, (a), (b), etc. may be used when describing the components of the embodiments of the present invention.

[0061] These terms are intended merely to distinguish a component from other components and are not limited by the essence, order, sequence, etc. of the component.

[0062] And, where it is stated that a component is 'connected', 'combined', or 'joined' to another component, this may include not only cases where the component is directly connected, combined, or joined to the other component, but also cases where it is 'connected', 'combined', or 'joined' due to another component located between the component and the other component.

[0063] Furthermore, when described as being formed or placed "above or below" each component, "above" or "below" includes not only cases where two components are in direct contact with each other, but also cases where one or more other components are formed or placed between the two components. Additionally, when expressed as "above or below," it may include the meaning of a downward direction as well as an upward direction relative to a single component.

[0064] FIG. 1 is a perspective view of a camera module according to an embodiment, FIG. 2 is an exploded perspective view of a camera module according to an embodiment, and FIG. 3 is a cross-sectional view of a camera module cut at AA' in FIG. 1.

[0065] Referring to FIGS. 1 and 2, a camera module (1000) according to an embodiment may consist of a cover (CV), a first camera actuator (1100), a second camera actuator (1200), and a circuit board (1300). Here, the first camera actuator (1100) may be used as the first actuator, and the second camera actuator (1200) may be used as the second actuator.

[0066] The cover (CV) can cover the first camera actuator (1100) and the second camera actuator (1200). The coupling force between the first camera actuator (1100) and the second camera actuator (1200) can be improved by the cover (CV).

[0067] Furthermore, the cover (CV) may be made of a material that performs electromagnetic shielding. Accordingly, the first camera actuator (1100) and the second camera actuator (1200) inside the cover (CV) can be easily protected.

[0068] And the first camera actuator (1100) may be an OIS (Optical Image Stabilizer) actuator. For example, the first camera actuator (1100) may move an optical member in a direction perpendicular to the optical axis.

[0069] The first camera actuator (1100) may include a fixed focal length lens disposed in a predetermined barrel (not shown). The fixed focal length lens may also be referred to as a “single focal length lens” or a “single lens.”

[0070] The first camera actuator (1100) can change the path of light. In an embodiment, the first camera actuator (1100) can change the path of light vertically through an internal optical element (e.g., a prism or a mirror). With this configuration, even if the thickness of the mobile terminal is reduced, a lens configuration larger than the thickness of the mobile terminal can be placed within the mobile terminal through the change of the path of light so that magnification, autofocus (AF), and OIS functions can be performed.

[0071] However, it is not limited to this, and the first camera actuator (1100) can change the light path multiple times vertically or at a predetermined angle.

[0072] The second camera actuator (1200) may be positioned at the rear end of the first camera actuator (1100). The second camera actuator (1200) may be coupled with the first camera actuator (1100). And the coupling between them may be achieved in various ways.

[0073] Additionally, the second camera actuator (1200) may be a zoom actuator or an AF (Auto Focus) actuator. For example, the second camera actuator (1200) may support one or more lenses and move the lenses according to a control signal from a predetermined control unit to perform an auto-focusing function or a zoom function. Also, one or more lenses may move independently or individually along the optical axis direction to perform AF.

[0074] A circuit board (1300) may be positioned at the rear end of a second camera actuator (1200). The circuit board (1300) may be electrically connected to the second camera actuator (1200) and the first camera actuator (1100). Additionally, there may be multiple circuit boards (1300). The circuit board (1300) may include an image sensor (IS) and may be fixed inside a camera module (1000). Additionally, the circuit board (1300) may be electrically connected to another sensor module within the terminal or to a processor of the terminal. Through this, the aforementioned camera actuator and the camera module including it can transmit and receive various signals within the terminal. The circuit board (1300) 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 (Rigid Flexible PCB). However, it is not limited to these types.

[0075] The camera module according to the embodiment may consist of a single or multiple camera modules. For example, the multiple camera modules may include a first camera module and a second camera module.

[0076] And the first camera module may include a single or multiple actuators. For example, the first camera module may include a first camera actuator (1100) and a second camera actuator (1200).

[0077] The second camera module may be disposed in a predetermined housing (not shown) and may include an actuator (not shown) capable of driving a lens portion. The actuator may be a voice coil motor, a micro actuator, a silicon actuator, etc., and may be applied in various ways such as electrostatic, thermal, bimorphic, and electrostatic force methods, but is not limited thereto. In addition, in this specification, the camera actuator may be referred to as an actuator, etc. Furthermore, a camera module composed of a plurality of camera modules may be mounted in various electronic devices such as mobile terminals.

[0078] Referring to FIG. 3, the camera module according to the embodiment may include a first camera actuator (1100) that performs an OIS function and a second camera actuator (1200) that performs a zooming function and an AF function.

[0079] Light can be incident into a camera module or the first camera actuator through an opening region located on the upper surface of the first camera actuator (1100). That is, light is incident into the interior of the first camera actuator (1100) along the optical axis direction (e.g., Z-axis direction), and the optical path can be changed in a vertical direction (e.g., Y-axis direction) through an optical member. Then, light passes through the second camera actuator (1200) and can be incident on an image sensor (IS) located at one end of the second camera actuator (1200) (PATH).

[0080] In this specification, the bottom surface refers to one side in the first direction. The first direction is the Z-axis direction in the drawing and may be used interchangeably with the first axis direction, etc. The second direction is the X-axis direction in the drawing and may be used interchangeably with the second axis direction, etc. The second direction is a direction perpendicular to the first direction. Additionally, the third direction is the Y-axis direction in the drawing and may be used interchangeably with the third axis direction, etc. The third direction is a direction perpendicular to both the first direction and the second direction. Here, the first direction (Z-axis direction) corresponds to the optical axis direction, and the second direction (X-axis direction) and the third direction (Y-axis direction) are directions perpendicular to the optical axis and may be tilted by the first camera actuator. The first direction is a direction perpendicular to the surface of the prism where light is incident, and the second direction may be a direction parallel to the surface of the prism where light is emitted. The third direction may be a direction perpendicular to the surface of the prism where light is emitted. In addition, in the description of the first camera actuator (1100) below, the optical axis direction is the first direction (Z-axis direction), and the description below is based on this.

[0081] Additionally, in this specification, the inner side may be the direction toward the first camera actuator from the cover (CV), and the outer side may be the opposite direction of the inner side. That is, the first camera actuator and the second camera actuator may be located on the inner side of the cover (CV), and the cover (CV) may be located on the outer side of the first camera actuator or the second camera actuator. Additionally, in this specification, the inner side may be the direction toward the first or second camera actuator from the bracket or shield can to be described later, and the outer side may be the opposite direction of the inner side.

[0082] And by this configuration, the camera module according to the embodiment can improve the spatial limitations of the first camera actuator and the second camera actuator by changing the light path. That is, the camera module according to the embodiment can expand the light path while minimizing the thickness of the camera module in response to the change in the light path. Furthermore, it should be understood that the second camera actuator can provide a high range of magnification by controlling focus, etc., in the expanded light path.

[0083] In addition, the camera module according to the embodiment can implement OIS by controlling the optical path through the first camera actuator, thereby minimizing the occurrence of decent or tilt phenomena and producing optimal optical characteristics.

[0084] Furthermore, the second camera actuator (1200) may include an optical system and a lens driving unit. For example, at least one of a first lens assembly, a second lens assembly, a third lens assembly, and a guide pin may be disposed in the second camera actuator (1200). Additionally, the second camera actuator (1200) may be equipped with a coil and a magnet to perform a high-magnification zooming function.

[0085] For example, the first lens assembly and the second lens assembly may be moving lenses that move via coils, magnets, and guide pins, and the third lens assembly may be a fixed lens, but is not limited thereto. For example, the third lens assembly may perform the function of a focuser that forms an image of light at a specific location, and the first lens assembly may perform the function of a variationator that re-forms the image formed by the third lens assembly (focuser) at a different location. Meanwhile, the first lens assembly may be in a state where the magnification changes significantly due to a large change in the distance to the subject or the image distance, and the first lens assembly (variator) may play an important role in the change of focal length or magnification of the optical system. On the other hand, the image formed by the first lens assembly (variator) may differ slightly depending on the location. Accordingly, the second lens assembly may perform a position compensation function for the image formed by the variationator. For example, the second lens assembly can perform the function of a compensator that accurately forms the image formed by the first lens assembly (which acts as a transducer) at the actual image sensor location. For example, the first lens assembly and the second lens assembly can be driven by electromagnetic force resulting from the interaction between a coil and a magnet. The above description may be applied to the lens assembly described below. Furthermore, the first to third lens assemblies can move along the optical axis direction, that is, the third direction. Additionally, the first to third lens assemblies can move in the third direction independently or dependently of each other.

[0086] Meanwhile, according to an embodiment of the present invention, when an actuator for OIS and an actuator for AF or Zoom are arranged, magnetic field interference with the magnet for AF or Zoom can be prevented during OIS operation. Since the first driving magnet of the first camera actuator (1100) is arranged separately from the second camera actuator (1200), magnetic field interference between the first camera actuator (1100) and the second camera actuator (1200) can be prevented. In this specification, OIS may be used interchangeably with terms such as hand shake correction, optical image stabilization, optical image correction, and shake correction.

[0087] In the following description of FIGS. 4 to 19, the camera actuator may correspond to the first camera actuator in the camera module of FIGS. 1 to 3. That is, in the following description of FIGS. 4 to 19, the camera actuator may correspond to an OIS actuator.

[0088] FIG. 4 is a perspective view of a camera actuator according to an embodiment, FIG. 5 is an exploded perspective view of a camera actuator according to an embodiment, FIG. 6 is a cross-sectional view of the cross section cut at BB' in FIG. 4, and FIG. 7 is a cross-sectional view of the cross section cut at CC' in FIG. 4.

[0089] Referring to FIGS. 4 to 7, the camera actuator (1100) may include a first housing (1110), a sub-housing (1120), a first lens module (1130), a mover (1140), a substrate part (1150), and a magnet part (1160).

[0090] FIG. 8 is a perspective view of the housing and sub-housing of a camera actuator according to an embodiment.

[0091] Referring to FIGS. 4 through 8, the camera actuator (1100) may include a housing (1110). The housing (1110) may form the outer wall of the camera actuator (1100). A sub-housing (1120), a mover (1140), and a magnet part (1160) may be disposed inside the housing (1110). A substrate part (1150) may be disposed outside the housing (1110). The housing (1110) may include a shape in which the outer side is partially open to allow light to be incident or emitted.

[0092] The housing (1110) may include first to sixth sides (S1, S2, S3, S4, S5, S6). The first side (S1) and the second side (S2) may be surfaces perpendicular to the first direction. The first side (S1) may be a surface into which light is incident. The first side (S1) may include an open shape to allow light to be incident on the prism (1142). The second side (S2) may support the sub-housing (1120) and the mover (1140). The second side (S2) may include a third coil hole (h3) to allow the third coil to be placed. The third side (S3) and the fourth side (S4) may be surfaces perpendicular to the second direction. The third side (S3) may include a first coil hole (h1) for placing the first coil (C1), and the fourth side (S4) may include a second coil hole (h2) for placing the second coil (C2). Additionally, a substrate portion (1150) may be placed on the outer side of the second side (S2), the third side (S3), and the fourth side (S4). The fifth side (S5) and the sixth side (S6) may be surfaces perpendicular to the third direction. The fifth side (S5) may be a surface from which light is emitted. Light may be reflected by a prism (1142) and emitted to the outside through the fifth side (S5) of the housing (1110). The fifth side (S5) may include an open shape to allow light to be emitted. A sub-housing (1120) may be placed on the sixth side (S6). The sixth side (S6) may include an open shape so that a sub-housing (1120) is positioned.

[0093] The camera actuator (1100) may include a sub-housing (1120). The sub-housing (1120) may be placed in the housing (1110). The sub-housing (1120) may be coupled to the housing (1110). The sub-housing (1120) may be placed on the sixth side (S6) of the housing (1110). The sub-housing (1120) may come into contact with the mover (1140). A fourth magnet (1164) may be placed in the sub-housing (1120). The fourth magnet (1164) may fix the mover (1140) through interaction with the fifth magnet (1165). The sub-housing (1120) may include a ball seating portion (1121) on which a projection (1141) of the mover (1140) is placed. The ball seating portion (1121) may include at least one inclined surface. The inclined surface of the ball seating portion (1121) may come into contact with the projection (1141).

[0094] The first lens module (1130) may be placed on the outside of the housing (1110). The first lens module (1130) may be placed on the mover (1140). Light may enter the interior of the camera actuator (1100) through the first lens module (1130). The first lens module (1130) may include at least one lens. The optical axis direction of the lens of the first lens module (1130) may be formed in a first direction. Light may pass through the first lens module (1130) and enter the prism (1142). The first lens module (1130) may overlap with the prism (1142) in the first direction.

[0095] FIGS. 9 to 11 are perspective views of a mover, a magnet part, and a sub-housing of a camera actuator according to an embodiment, and FIG. 12 is a front view of a mover, a magnet part, and a sub-housing of a camera actuator according to an embodiment.

[0096] Referring to FIGS. 4 through 12, the camera actuator (1100) may include a mover (1140). A prism (1143) may be disposed in the mover (1140). The mover (1140) may rotate around a first axis (l1), a second axis (l2), or a third axis (l3) in contact with a sub-housing (1120). The mover (1140) may perform tilting of the prism (1142) by rotating around the first axis (l1), the second axis (l2), or the third axis (l3). The mover (1140) may be disposed inside the housing (1110). The mover (1140) may be coupled with a first lens module (1130). The mover (1140) may include a receiving space in which the prism (1142) is disposed. Additionally, the mover (1140) may include an inclined surface on which the reflective surface (1142b) of the prism (1142) is placed. First to third magnets (1161, 1162, 1163) may be placed in the mover (1140). The mover (1140) may include a magnet groove on which the first to third magnets (1161, 1162, 1163) are placed. The mover (1140) may include a projection (1141). The projection (1141) may be placed on the ball seating portion (1121) of the sub-housing (1120). The projection (1141) may include a hemispherical shape. The projection (1141) may form the center of the rotation axis of the mover (1140). The center of the hemisphere of the projection (1141) may overlap with the intersection of the first axis, the second axis, and the third axis.

[0097] The mover (1140) may include a first member (1140a). The first member (1140a) may be coupled to the mover (1140). A fifth magnet (1165) may be disposed on the first member (1140a). The first member (1140a) may be disposed to overlap with the sub-housing (1120) in a third direction. The first member (1140a) may be disposed to partially intersect with the sub-housing (1120). Accordingly, the mover (1140) can be fixed to the sub-housing (1120) through the fifth magnet (1165) disposed on the first member (1140a) and the fourth magnet (1164) disposed on the sub-housing (1120).

[0098] The mover (1140) may include a prism (1142). The prism (1142) may reflect light. The prism (1142) may be placed on an inclined surface of the mover (1140). The first prism (1142) may reflect and emit light incident from the outside. The prism (1142) may include an incident surface (1142a) where light is incident, a reflective surface (1142b) that reflects light, and an exit surface (1142c) where light is emitted. The reflective surface (1142b) of the prism (1142) may be placed on an inclined surface of the mover (1140). The incident surface (1142a) of the prism (1142) may be placed perpendicular to the first direction. The exit surface (1142c) of the prism (1142) may be placed perpendicular to the third direction. The center of the reflective surface (1142b) of the prism (1142) may overlap with the optical axis of the prism (1142) and the optical axis of the reflected light of the prism (1142). Additionally, the center of the reflective surface (1142b) of the prism (1142) may overlap with the intersection of the first axis (l1), the second axis (l2), and the third axis (l3).

[0099] FIG. 13 is a perspective view of the magnet portion of a camera actuator according to an embodiment, FIG. 14 is a perspective view of the magnet portion and substrate portion of a camera actuator according to an embodiment, FIG. 15 is a front view of the magnet portion and substrate portion of a camera actuator according to an embodiment, and FIG. 16 is a top view of the magnet portion and substrate portion of a camera actuator according to an embodiment.

[0100] Referring to FIGS. 4 through 16, the camera actuator (1100) may include a substrate portion (1150). The substrate portion (1150) may supply power required for driving the camera actuator (1100). The substrate portion (1150) may be disposed on the outside of the housing (1110). The substrate portion (1150) may be disposed on the outside of the second side (S2), the third side (S3), and the fourth side (S4) of the housing (1110). The substrate portion (1150) may include a first sub-substrate to a third sub-substrate (1150a, 1150b, 1150c), a coil portion (C1, C2, C3), a sensor portion (1151), and a driver IC (1152).

[0101] The substrate portion (1150) may include a first sub-substrate (1150a) and a second sub-substrate (1150b) in a form that is bent from a third sub-substrate (1150c). The first sub-substrate (1150a) and the second sub-substrate (1150b) may be arranged perpendicular to the second direction, and the third sub-substrate (1150c) may be arranged perpendicular to the first direction. The first sub-substrate (1150a) and the second sub-substrate (1150b) may be bent in the first direction from both ends of the third sub-substrate (1150c). A first sub-substrate (1150a) may be placed on the third side (S3) of the housing (1110), a second sub-substrate (1150b) may be placed on the fourth side (S4) of the housing (1110), and a third sub-substrate (1150c) may be placed on the second side (S2) of the housing (1110).

[0102] The coil portion may include a plurality of coils. The coil portion may include first to third coils (C1, C2, C3). The first to third coils (C1, C2, C3) may each be placed on a first to third sub-substrate (1150a, 1150b, 1150c). The first to third coils (C1, C2, C3) may each apply electromagnetic force to a first to third magnet (1161, 1162, 1163) to perform OIS driving. The first coil (C1) may overlap with the first magnet (1161) in a second direction, the second coil (C2) may overlap with the second magnet (1162) in a second direction, and the third coil (C3) may overlap with the third magnet (1163) in a first direction. The first to third coils (C1, C2, C3) may include an inner hole. The first coil (C1) may be placed in the first coil hole (h1) of the housing (1110), the second coil (C2) may be placed in the second coil hole (h2) of the housing (1110), and the third coil (C3) may be placed in the third coil hole (h3) of the housing (1110). The first coil (C1) and the second coil (C2) may be placed perpendicular to the second direction. The third coil (C3) may be placed perpendicular to the first direction. The first coil (C1) and the second coil (C2) may overlap in the second direction. The first to third coils (C1, C2, C3) may include an inner hole. At this time, the first to third coils (C1, C2, C3) may each be driven independently.

[0103] The first coil (C1) may have its major axis aligned parallel to the third direction and its minor axis aligned parallel to the first direction. The second coil (C2) may have its major axis aligned parallel to the first direction and its minor axis aligned parallel to the third direction. The major axes of the first coil (C1) and the second coil (C2) may be aligned perpendicular to each other. The third coil (C3) may have its major axis aligned parallel to the second direction and its minor axis aligned parallel to the third direction.

[0104] The sensor unit (1151) can sense the OIS driving of the camera actuator (1100). The sensor unit (1151) can be placed inside the substrate unit (1150). The sensor unit (1151) may include a plurality of sensors. The sensor unit (1151) can be placed in the inner holes of the first to third coils (C1, C2, C3). The driver IC (1152) can be placed inside the substrate unit (1150). The driver IC (1152) can control the driving of the camera actuator (1100).

[0105] The sensor unit (1151) may include a first sensor unit (1151a), a second sensor unit (1151b), and a third sensor unit (1151c). The first sensor unit (1151a), the second sensor unit (1151b), and the third sensor unit (1151c) may each be placed in the inner holes of the first to third coils (C1, C2, C3). The first sensor unit (1151a), the second sensor unit (1151b), and the third sensor unit (1151c) may each be placed on the first sub-substrate (1150a), the second sub-substrate (1150b), and the third sub-substrate (1150c). The first sensor unit (1151a) may sense rotation around the third axis (13) of the mover (1140). The second sensor unit (1151b) can sense rotation around the first axis (l1) of the mover (1140). Additionally, the third sensor unit (1151c) can sense rotation around the second axis (l2) of the mover (1140). At this time, the first sensor unit (1151a), the second sensor unit (1151b), and the third sensor unit (1151c) can each be driven independently.

[0106] The camera actuator (1100) may include a magnet portion (1160). The magnet portion (1160) can tilt the mover (1140) through interaction with the first to third coils (C1, C2, C3). Additionally, the magnet portion (1160) can fix the mover (1140). The magnet portion (1160) may include at least one magnet and at least one magnet yoke. The magnet portion (1160) may include a plurality of magnets. The magnet portion (1160) may include a driving magnet and a fixed magnet. The magnet portion (1160) may include first to fifth magnets (1161, 1162, 1163, 1164, 1165). Additionally, the magnet portion (1160) may include a first magnet yoke to a third magnet yoke (1166a, 1166b, 1166c).

[0107] The first to third magnets (1161, 1162, 1163) may be driving magnets. The first to third magnets (1161, 1162, 1163) may each correspond to the first to third driving magnets. The first to third magnets (1161, 1162, 1163) may each tilt the mover (1140) through interaction with the first to third coils (C1, C2, C3). The first to third magnets (1161, 1162, 1163) may be placed on the mover (1140). The first to third magnets (1161, 1162, 1163) may be placed in the magnet grooves of the mover (1140). The first magnet (1161) and the second magnet (1162) may be placed perpendicular to the second direction. That is, the first magnet (1161) and the second magnet (1162) may be placed on the side of the mover (1140). Additionally, the first magnet (1161) may be placed adjacent to the third side (S3) of the housing (1110), and the second magnet (1162) may be placed adjacent to the fourth side (S4) of the housing (1110). The first magnet (1161) and the second magnet (1162) may be placed spaced apart in the second direction. The third magnet (1163) may be positioned perpendicular to the first direction. That is, the third magnet (1163) may be positioned on the lower surface of the mover (1140). The third magnet (1163) may be positioned adjacent to the second side (S2) of the housing (1110). The first to third magnets (1161, 1162, 1163) may each include at least one sub-magnet.

[0108] The first magnet (1161) may include a first sub-magnet (1161a), a second sub-magnet (1161b), and a first void (1161c). The first sub-magnet (1161a) and the second sub-magnet (1161b) may each be separate magnets including an anode. The first sub-magnet (1161a) and the second sub-magnet (1161b) may be spaced apart in a first direction. A first void (1161c) may be disposed between the first sub-magnet (1161a) and the second sub-magnet (1161b). The first sub-magnet (1161a) may be disposed on top of the second sub-magnet (1161b). The first sub-magnet (1161a) may be spaced apart from the third magnet (1163) more than the second sub-magnet (1161b).

[0109] The positive pole of the first sub-magnet (1161a) and the positive pole of the second sub-magnet (1161b) may each be positioned in a second direction. Additionally, the positive pole of the first sub-magnet (1161a) and the positive pole of the second sub-magnet (1161b) may be positioned in opposite directions to each other. For example, if the N pole of the first sub-magnet (1161a) is positioned on the outside and the S pole is positioned on the inside, the S pole of the second sub-magnet (1161b) may be positioned on the outside and the N pole on the inside. In this case, the N pole of the first sub-magnet (1161a) may overlap with the S pole of the second sub-magnet (1161b) in a first direction, and the S pole of the first sub-magnet (1161a) may overlap with the N pole of the second sub-magnet (1161b) in a first direction.

[0110] The first magnet (1161) may include a first contact surface (t1) in contact with the first magnet yoke (1166a). The first contact surface (t1) may be an inner surface of the first magnet (1161). That is, the first contact surface (t1) may be a surface adjacent to the second magnet (1162) of the first magnet (1161). The first contact surface (t1) may be a surface perpendicular to the second direction. On the first contact surface (t1) of the first magnet (1161), the positive electrode may be positioned in the first direction.

[0111] The second magnet (1162) may include a third sub-magnet (1162a), a fourth sub-magnet (1162b), and a second void (1162c). The third sub-magnet (1162a) and the fourth sub-magnet (1162b) may each be separate magnets including an anode. The third sub-magnet (1162a) and the fourth sub-magnet (1162b) may be spaced apart in a third direction. A second void (1162c) may be disposed between the third sub-magnet (1162a) and the fourth sub-magnet (1162b). The third sub-magnet (1162a) may be disposed spaced further from the sub-housing (1120) than the fourth sub-magnet (1162b).

[0112] The positive pole of the third sub-magnet (1162a) and the positive pole of the fourth sub-magnet (1162b) may each be positioned in a second direction. Additionally, the positive pole of the third sub-magnet (1162a) and the positive pole of the fourth sub-magnet (1162b) may be positioned in opposite directions to each other. For example, if the N pole of the third sub-magnet (1162a) is positioned on the outside and the S pole is positioned on the inside, the S pole of the fourth sub-magnet (1162b) may be positioned on the outside and the N pole on the inside. In this case, the N pole of the third sub-magnet (1162a) may overlap with the S pole of the fourth sub-magnet (1162b) in a third direction, and the S pole of the third sub-magnet (1162a) may overlap with the N pole of the fourth sub-magnet (1162b) in a third direction.

[0113] The second magnet (1162) may include a second contact surface (t2) that contacts the second magnet yoke (1166b). The second contact surface (t2) may be an inner surface of the second magnet (1162). That is, the second contact surface (t2) may be a surface of the second magnet (1162) adjacent to the first magnet (1161). The second contact surface (t2) may be a surface perpendicular to the second direction. The positive electrode may be positioned in a third direction at the second contact surface (t2) of the second magnet (1162). Thus, the direction of placement of the positive electrode at the first contact surface (t1) of the first magnet (1161) and the direction of placement of the positive electrode at the second contact surface (t2) of the second magnet (1162) may be perpendicular to each other. That is, the first magnet (1161) and the second magnet (1162) may have the arrangement direction of their positive poles on opposite sides perpendicular to each other.

[0114] The width of the first magnet (1161) in the second direction and the width of the second magnet (1162) in the first direction may be the same. Additionally, the width of the first magnet (1161) in the third direction and the width of the second magnet (1162) in the third direction may be the same. Accordingly, the size and weight of the first magnet (1161) and the second magnet (1162) placed on both sides of the mover (1140) are made equal, thereby preventing eccentricity of the center of gravity during tilt driving of the mover.

[0115] The third magnet (1163) may include a fifth sub-magnet (1163a), a sixth sub-magnet (1163b), and a third void (1163c). The fifth sub-magnet (1163a) and the sixth sub-magnet (1163b) may each be separate magnets including an anode. The fifth sub-magnet (1163a) and the sixth sub-magnet (1163b) may be spaced apart in a third direction. A third void (1163c) may be disposed between the fifth sub-magnet (1163a) and the sixth sub-magnet (1163b). The fifth sub-magnet (1163a) may be disposed at the front end of the sixth sub-magnet (1163b). The fifth sub-magnet (1163a) may be spaced apart from the fourth magnet (1164) more than the sixth sub-magnet (1163b).

[0116] The positive pole of the fifth sub-magnet (1163a) and the positive pole of the sixth sub-magnet (1163b) may each be positioned in a first direction. Additionally, the positive pole of the fifth sub-magnet (1163a) and the positive pole of the sixth sub-magnet (1163b) may be positioned in opposite directions. For example, if the N pole of the fifth sub-magnet (1163a) is positioned on the outside and the S pole is positioned on the inside, the S pole of the sixth sub-magnet (1163b) may be positioned on the outside and the N pole on the inside. In this case, the N pole of the fifth sub-magnet (1163a) may overlap with the S pole of the sixth sub-magnet (1163b) in a third direction, and the S pole of the fifth sub-magnet (1163a) may overlap with the N pole of the sixth sub-magnet (1163b) in a third direction.

[0117] The mover (1140) of the camera actuator (1100) can rotate in three axes by means of the first to third magnets (1161, 1162, 1163). The first magnet (1161) can receive electromagnetic force in the first direction through interaction with the first coil (C1). Accordingly, the mover (1140) can rotate around the third direction (third axis (l3)). The second magnet (1162) can receive electromagnetic force in the third direction through interaction with the second coil (C2). Accordingly, the mover (1140) can rotate around the first direction (first axis (l1)). The third magnet (1163) can receive electromagnetic force in the third direction through interaction with the third coil (C3). Accordingly, the mover (1140) can rotate around a second direction (second axis (l2)). As the positive poles of the first magnet (1161) and the second magnet (1162) placed on both sides of the mover (1140) are arranged perpendicular to each other, the mover (1140) can tilt around different directions. At this time, the intersection of the first axis (l1), the second axis (l2), and the third axis (l3) can overlap with the center of the hemisphere of the projection (1141) and the center of the reflective surface (1142b) of the prism (1142).

[0118] The fourth magnet (1164) and the fifth magnet (1165) may be fixed magnets. The fourth magnet (1164) and the fifth magnet (1165) may fix the mover (1140) through mutual interaction. The fourth magnet (1164) may be placed in the sub-housing (1120), and the fifth magnet (1165) may be placed in the first member (1140a). The fourth magnet (1164) and the fifth magnet (1165) may face each other. The fourth magnet (1164) and the fifth magnet (1165) may overlap in a third direction. The fourth magnet (1164) and the fifth magnet (1165) may overlap in a third direction with the projection (1141) and the prism (1142). The fourth magnet (1164) and the fifth magnet (1165) can exert a repulsive force. Accordingly, the mover (1140) can be pulled toward the sub-housing (1120) and fixed on the sub-housing (1120).

[0119] The substrate portion (1150) and magnet portion (1160) of the camera actuator (1100) may correspond to a first driving portion that drives the mover (1140).

[0120] FIG. 17 is a cross-sectional view of a camera actuator according to another embodiment, FIG. 18 is a cross-sectional view of a camera actuator according to another embodiment, FIG. 19 is a drawing for explaining a spring portion of a camera actuator according to an embodiment, and FIG. 20 is a perspective view of a camera actuator according to various embodiments.

[0121] The description of the camera actuators in FIGS. 4 to 16 above may be applied to the description of the camera actuators in FIGS. 17 to 20. Hereinafter, in the description of the camera actuators in FIGS. 17 to 20, content that overlaps with the description of the camera actuators in FIGS. 4 to 16 will be omitted.

[0122] Referring to FIGS. 17 through 20, the camera actuator (2100) may include a spring portion (2170). The spring portion (2170) may be positioned between the sub-housing (2120) and the first member (2140a). The spring portion (2170) may be coupled with the sub-housing (2120) and the first member (2140a) to fix the mover (2140) to the sub-housing (2120). The spring portion (2170) may extend in a third direction. The spring portion (2170) may overlap with the sub-housing (2120) and the first member (2140a) in a third direction. The spring portion (2170) may overlap with the projection (2141) and the prism (2142) of the mover (2140) in a third direction. The spring portion (2170) can replace the fixed magnet in the camera actuator of FIGS. 4 to 16. The spring portion (2170) can fix the mover (2140) in a third direction. The spring portion (2170) can fix the mover (2140) in a third direction by the restoring force of the compressed spring. Additionally, the spring portion (2170) can fix the mover (2140) so that it does not rotate around the third direction. Referring to FIG. 18b, the sub-housing (2120) and the first member (2140a) may include a spring groove that fixes the end of the spring portion (2170). In this case, a part of the spring portion (2170) is positioned inside the sub-housing (2120) and the first member (2140a) so that it overlaps with the sub-housing (2120) and the first member (2140a) in a second direction. The spring part (2170) replaces the fixed magnet, so that the magnetic field distribution of the magnet is not necessary, and it can prevent poor configuration performance when the magnetic field is not managed.

[0123] Referring to FIG. 20a, the spring portion (2170) may include a first spring (2171) and a second spring (2172). The first spring (2171) and the second spring (2172) may be spaced apart in a second direction on the sub-housing (2120). Referring to FIG. 20b, the spring portion (2170) may include a first spring (2171), a second spring (2172), and a third spring (2173). The first spring (2171), the second spring (2172), and the third spring (2173) may be spaced apart in a second direction on the sub-housing (2120). Referring to FIG. 20c, the spring portion (2170) may include a first spring (2171), a second spring (2172), a third spring (2173), and a fourth spring (2174). The first spring (2171) and the second spring (2172) may be spaced apart in the second direction, and the third spring (2173) and the fourth spring (2174) may be spaced apart in the second direction. Additionally, the first spring (2171) and the third spring (2173) may be spaced apart in the first direction, and the second spring (2172) and the fourth spring (2174) may be spaced apart in the first direction.

[0124] FIG. 21 is a perspective view of a mobile terminal with a camera module applied according to an embodiment.

[0125] Referring to FIG. 21, the mobile terminal of the embodiment may include a camera module (1000), a flash module (1510), and an autofocus device (1530) provided on the rear.

[0126] The camera module (1000) may include an image capturing function and an autofocus function. For example, the camera module (1000) may include an autofocus function using an image.

[0127] The camera module (1000) processes still image or video frame obtained by the image sensor in shooting mode or video call mode.

[0128] The processed image frame may be displayed on a designated display unit and stored in memory. A camera (not shown) may also be placed on the front of the mobile terminal body.

[0129] For example, the camera module (1000) may include a first camera module and a second camera module, and the first camera module may enable the implementation of AF or zoom functions along with OIS. Additionally, AF, zoom, and OIS functions may be performed by the second camera module. In this case, since the first camera module includes both the OIS actuator and the camera actuator described above, the camera module can be easily miniaturized by changing the light path.

[0130] The flash module (1510) may include a light-emitting element that emits light inside. The flash module (1510) may be operated by the operation of the camera of the mobile terminal or by the control of the user.

[0131] The autofocus device (1530) may include one of the packages of surface light-emitting laser elements as a light-emitting part.

[0132] The autofocus device (1530) may include an autofocus function using a laser. The autofocus device (1530) may be mainly used in conditions where the autofocus function using the image of the camera module (1000) is degraded, such as in a close distance of 10m or less or in a dark environment.

[0133] The autofocus device (1530) may include a light-emitting part comprising a vertical cavity surface-emitting laser (VCSEL) semiconductor device and a light-receiving part that converts light energy into electrical energy, such as a photodiode.

[0134] FIG. 22 is a perspective view of a vehicle with a camera module applied according to an embodiment.

[0135] For example, FIG. 22 is an exterior view of a vehicle equipped with a vehicle driving assistance device having a camera module applied according to an embodiment.

[0136] Referring to FIG. 22, 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 (3000), but is not limited thereto.

[0137] The camera sensor (3000) may be a camera sensor to which a camera module according to the embodiment is applied. The vehicle (700) of the embodiment can acquire image information through the camera sensor (3000) that captures a front image or a surrounding image, and can determine a situation where a lane is not identified using the image information and generate a virtual lane when it is not identified.

[0138] For example, a camera sensor (3000) captures the front of a vehicle (700) to obtain a front image, and a processor (not shown) can obtain image information by analyzing objects included in the front image.

[0139] For example, if objects such as a median strip, curb, or roadside tree corresponding to a lane, adjacent vehicle, driving obstruction, and indirect road marking are captured in an image captured by the camera sensor (3000), the processor can detect these objects and include them in the image information. At this time, the processor can obtain distance information with respect to the objects detected through the camera sensor (3000) to further supplement the image information.

[0140] The image information may be information about an object captured in the image. Such a camera sensor (3000) may include an image sensor and an image processing module.

[0141] The camera sensor (3000) can process still images or videos obtained by an image sensor (e.g., CMOS or CCD).

[0142] The image processing module can process still images or videos acquired through an image sensor to extract necessary information and transmit the extracted information to a processor.

[0143] At this time, the camera sensor (3000) may include a stereo camera to improve the measurement accuracy of the object and to obtain more information such as the distance between the vehicle (700) and the object, but is not limited thereto.

[0144] Although the invention has been described above with reference to embodiments, this is merely illustrative and does not limit the invention. Those skilled in the art will understand that various modifications and applications not exemplified above are possible within the scope of the essential characteristics of the embodiments. For example, each component specifically shown in the embodiments may be modified and implemented. Furthermore, differences related to such modifications and applications should be interpreted as being included within the scope of the invention as defined in the appended claims.

Claims

1. Housing; A mover disposed within the above housing; A prism disposed on the above-mentioned mover, to which light is incident in a first direction; It includes a first driving unit that drives the above-mentioned mover, and The first driving unit includes a coil section comprising a plurality of coils and a magnet section comprising a plurality of magnets, and The above magnet portion includes a first magnet and a second magnet spaced apart in a second direction perpendicular to the first direction, and The first magnet and the second magnet have the arrangement directions of the positive poles on opposite surfaces perpendicular to each other, and A camera actuator in which the first direction (Z-axis) is a direction perpendicular to the plane of incidence of light of the prism.

2. In Paragraph 1, The first magnet includes a first sub-magnet and a second sub-magnet spaced apart in the first direction, and The camera actuator comprising the second magnet, a third sub-magnet and a fourth sub-magnet spaced apart in a third direction perpendicular to the first direction and the second direction.

3. In Paragraph 2, The positive poles of the first to fourth sub-magnets are camera actuators arranged in the second direction.

4. In Paragraph 3, The first magnet includes a first void disposed between the first sub-magnet and the second sub-magnet, and The second magnet is a camera actuator comprising a second gap disposed between the third sub-magnet and the fourth sub-magnet.

5. In Paragraph 2, The width of the first magnet and the second magnet in the first direction is the same, and A camera actuator having the same width in the third direction of the first magnet and the second magnet.

6. In Paragraph 2, The above coil portion includes a first coil facing the first magnet and a second coil facing the second magnet, and The long axis of the first coil is positioned in the third direction, and The long axis of the second coil is a camera actuator positioned in the first direction.

7. In Paragraph 6, The above magnet part includes a third magnet, and The third magnet is a camera actuator that overlaps with the mover in the first direction.

8. In Paragraph 7, The mover is a camera actuator that rotates around a first axis parallel to the first direction, a second axis parallel to the second direction, and a third axis parallel to the third direction.

9. In Paragraph 8, The above mover rotates around the third axis by the electromagnetic force of the first magnet and the first coil, and The above mover is a camera actuator that rotates around the first axis by the electromagnetic force of the second magnet and the second coil.

10. In Paragraph 9, The above coil portion includes a third coil facing the third magnet, and The above mover is a camera actuator that rotates around the second axis by the electromagnetic force of the third magnet and the third coil.

Images