Camera actuator and camera module including the same

Abstract

A camera actuator according to an embodiment of the present invention comprises: a housing; a first bobbin that moves in the optical axis direction within the housing; and a driving unit that moves the first bobbin. The first bobbin includes: a first lens holder that accommodates a lens; a guide unit, wherein the guide unit faces the housing; and a coupling member disposed between the first lens holder and the guide unit.

Description

Technical Field

[0001] The present invention relates to a camera actuator and a camera module including the camera actuator. Background Technology

[0002] A camera is a device that captures photos or videos of objects and is installed in portable devices, drones, vehicles, etc. Camera modules may have: image stabilization (IS) to correct or prevent image shake caused by user movement; autofocus to automatically adjust the gap between the image sensor and the lens to align the lens's focal length; and zoom functionality to use a zoom lens to increase or decrease the magnification of distant objects to improve image quality.

[0003] Here, there is a problem of lens performance degradation in the camera module due to long lens movement. Summary of the Invention

[0004] Technical issues

[0005] The technical problem to be solved by the embodiments of the present invention is to provide a camera actuator and camera module that have improved optical performance by promoting optical axis alignment (AA) of the coil frame.

[0006] In addition, embodiments of the present invention may provide a camera actuator and camera module that provide effective performance enhancement through angle correction of a first coil frame having a long travel distance or stroke.

[0007] Furthermore, embodiments of the present invention can provide a camera actuator and camera module with improved coupling force between the lens holder and the guide unit of the coil frame.

[0008] Embodiments of the present invention provide camera actuators suitable for ultra-thin, ultra-compact, and high-resolution cameras.

[0009] The problems to be solved by the implementation methods are not limited thereto, and also include purposes or effects that can be understood from the solutions to the problems or implementation methods described below.

[0010] Technical solutions

[0011] A camera actuator according to an embodiment of the present invention includes: a housing; a first coil holder disposed in the housing; and a drive unit configured to move the first coil holder along an optical axis, wherein the first coil holder includes: a first lens holder configured to accommodate a lens; a first guide unit disposed on a side portion of the housing; and a connecting member disposed between the first lens holder and the first guide unit.

[0012] The first lens holder may include a first surface that contacts the bonding member, and

[0013] The first guiding unit may include a second surface that contacts the connecting member.

[0014] The first surface may include a first groove, and the second surface of the first guiding unit may include a second groove.

[0015] The first groove and the second groove may overlap in the direction from the first surface toward the second surface.

[0016] The first surface may include a first protrusion disposed in the first groove, and the second surface may include a second protrusion disposed in the second groove.

[0017] The first protrusion and the second protrusion may overlap in the direction from the first surface toward the second surface.

[0018] The first guide unit may include a third surface configured opposite to the second surface, and the third surface of the first guide unit may face the side portion of the housing and include a recess in which a spherical member is disposed.

[0019] The side portion of the housing may include a first side portion and a second side portion, the first side portion having an inner surface facing the first guide unit of the first coil frame, and the second side portion being opposite to the first side portion.

[0020] The housing may include an upper surface and a lower surface disposed between a first side portion and a second side portion, the upper surface may include a first hole, and the lower surface may include a second hole.

[0021] The connecting member can be exposed through at least one of the first hole and the second hole.

[0022] The first part of the first guiding unit can be exposed through at least one of the first hole and the second hole.

[0023] The second part located on the side portion of the first part of the first guide unit and the housing can overlap in the direction from the first hole toward the second hole.

[0024] The connecting member can be disposed between the first protrusion and the second protrusion, and can also be disposed between the first groove and the second groove.

[0025] A second coil frame may be provided, which is spaced apart from the first coil frame in the optical axis direction, and the second coil frame may include: a second lens holder; and a second guiding unit that extends from the second lens holder along a first direction and is directly connected to the second lens holder.

[0026] A camera actuator according to an embodiment includes: a housing; a coil holder disposed in the housing; and a drive unit that moves the coil holder along an optical axis, wherein the coil holder includes: a lens holder; and a guide unit disposed on a side portion of the housing, the lens holder including a first surface, the guide unit including a second surface connected to the first surface, and the first surface and the second surface being angled relative to each other.

[0027] The optical axis direction and the second surface can be set at an angle to each other.

[0028] The coil frame may include a connecting member disposed between the lens holder and the guide unit, and the first connecting member and the second connecting member, which are spaced apart from each other in the optical axis direction, may have different thicknesses.

[0029] The third and fourth connecting members, which are positioned spaced apart in a direction perpendicular to the optical axis, can have different thicknesses.

[0030] The camera actuator according to an embodiment includes: a housing; a coil holder disposed in the housing; and a drive unit that moves the coil holder along an optical axis, wherein the coil holder includes: a lens holder having a lens housed therein; and a guide unit disposed on a side portion of the housing, and the central axis of the lens holder is adjusted relative to the guide unit.

[0031] The coil holder may include a connecting member disposed between the lens holder and the guide unit, and the optical axis of the lens holder may be adjusted relative to the guide unit.

[0032] Beneficial effects

[0033] According to embodiments of the present invention, camera actuators and camera modules with improved optical performance can be achieved by promoting optical axis alignment (AA) of the coil frame.

[0034] In addition, embodiments of the present invention can realize a camera actuator and camera module that provides effective performance improvement through angle correction of a first coil frame with a long travel distance or stroke.

[0035] Furthermore, embodiments of the present invention can realize camera actuators and camera modules with improved coupling force between the lens holder and the guide unit of the coil frame.

[0036] The embodiments of the present invention can realize camera actuators suitable for ultra-thin, ultra-small and high-resolution cameras.

[0037] The various useful advantages and effects of the present invention are not limited to the foregoing, and can be more readily understood in the process of describing specific embodiments of the invention. Attached Figure Description

[0038] Figure 1 This is a perspective view of the camera module according to the implementation method.

[0039] Figure 2 This is an exploded perspective view of the camera module according to the implementation method.

[0040] Figure 3 It is along Figure 1 A cross-sectional view of line AA' in the diagram.

[0041] Figure 4 This is a perspective view of the second camera actuator according to the embodiment.

[0042] Figure 5 This is an exploded perspective view of the second camera actuator according to the embodiment.

[0043] Figure 6 It is along Figure 4 A cross-sectional view of line DD' in the diagram.

[0044] Figure 7a , Figure 7b and Figure 7c This is a perspective view of the housing in the second camera actuator according to the embodiment.

[0045] Figure 8 and Figure 9 This is a view used to describe each drive of the lens assembly according to the embodiment.

[0046] Figure 10 This is a view used to describe the operation of the second camera actuator according to an embodiment.

[0047] Figure 11 This is a perspective view of a portion of the configuration of the second camera actuator according to an embodiment.

[0048] Figure 12 This is a view showing the optical drive coil, optical drive magnet, and magnetic yoke according to an embodiment.

[0049] Figure 13 This is a view used to describe the movement of an optically driven magnet using a drive unit according to an embodiment.

[0050] Figure 14 This is a perspective view of the first lens assembly, the first connecting member, the second connecting member, and the second lens assembly according to an embodiment.

[0051] Figure 15This is an exploded perspective view of the first lens assembly according to the embodiment.

[0052] Figure 16 This is a perspective view of the first lens assembly according to the embodiment.

[0053] Figure 17 This is another perspective view of the first lens assembly according to the embodiment.

[0054] Figure 18 This is a view used to illustrate the structure of the first lens holder and the guiding unit in the first lens assembly according to an embodiment.

[0055] Figure 19 It is along Figure 16 A cross-sectional view of line II' in the diagram.

[0056] Figure 20 This is a top view of the second camera actuator according to an embodiment.

[0057] Figure 21 This is a view showing the inside of the housing in the second camera actuator according to an embodiment.

[0058] Figure 22 This is a bottom view of the second camera actuator according to the embodiment.

[0059] Figure 23 This is a view showing the inside of the housing in the second camera actuator according to an embodiment.

[0060] Figure 24 This is a view used to illustrate the combination of the lens holder and the guiding unit in the first lens assembly of the second camera actuator according to an embodiment.

[0061] Figure 25 It is a graph showing the spatial frequency response (SFR) in wide-angle and telephoto states after optical axis alignment (active alignment) based on the movement of the fixed component and the first lens assembly.

[0062] Figure 26 This is a top view of a second camera actuator according to another embodiment.

[0063] Figure 27 This is a top view of a second camera actuator according to yet another embodiment.

[0064] Figure 28 This is a schematic diagram showing a circuit board according to an embodiment.

[0065] Figure 29 This is a perspective view of a mobile terminal that incorporates a camera module according to an implementation method.

[0066] Figure 30 It is a perspective view of a vehicle equipped with a camera module according to the implementation method. Detailed Implementation

[0067] This invention can have various modifications and implementations, and specific embodiments are illustrated and described in the accompanying drawings. This is not intended to limit the invention to the specific embodiments, but rather to include all modifications, equivalents, or alternatives encompassed within the spirit and scope of the invention.

[0068] Although ordinal terms such as second and first can be used to describe various constituent elements, constituent elements are not limited by these terms. These terms are only used to distinguish one constituent element from another. For example, without departing from the scope of the invention, a second constituent element may be referred to as a first constituent element, and similarly, a first constituent element may be referred to as a second constituent element. Terms and / or any combination of multiple related descriptive items or any item from multiple related descriptive items are also included.

[0069] When a component is referred to as "connected" or "coupled" to another component, it should be understood that although the component may be directly connected or coupled to another component, another component may also exist between them. On the other hand, when any component is referred to as "directly connected" or "directly coupled" to another component, it should be understood that there is no other component between them.

[0070] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. It should be understood in this application that terms such as “comprising” or “having” are intended to specify the presence of the features, numbers, steps, operations, constituent elements, portions, or combinations thereof described in this specification, but do not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, constituent elements, portions, or combinations thereof.

[0071] Unless otherwise defined, all terms used herein—including technical or scientific terms—have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Terms as defined in commonly used dictionaries should be interpreted as having the same meaning as they have in the context of the relevant field, and will not be interpreted in an idealized or overly formal sense unless expressly defined otherwise in this application.

[0072] In the following, various embodiments will be described in detail with reference to the accompanying drawings. Regardless of the reference numerals, the same or corresponding constituent elements are indicated by the same reference numerals, and repeated descriptions of the same or corresponding constituent elements will be omitted.

[0073] Figure 1 This is a perspective view of the camera module according to the implementation method. Figure 2 This is an exploded perspective view of the camera module according to the implementation method, and Figure 3 It is along Figure 1 The cross-sectional view of line AA' in the diagram.

[0074] Reference Figure 1 and Figure 2 According to the embodiment, the camera module 1000 may be composed 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 interchangeably with the first actuator, and the second camera actuator 1200 may be used interchangeably with the second actuator.

[0075] The cover CV can cover the first camera actuator 1100 and the second camera actuator 1200. The cover CV can be used to increase the connection force between the first camera actuator 1100 and the second camera actuator 1200.

[0076] Furthermore, the cover CV can be made of a material that performs electromagnetic shielding. Therefore, the first camera actuator 1100 and the second camera actuator 1200 in the cover CV can be easily protected.

[0077] Furthermore, the first camera actuator 1100 may be an optical image stabilization (OIS) actuator. For example, the first camera actuator 1100 may cause the optical component to move in a direction perpendicular to the optical axis (the axis of the incident light).

[0078] The first camera actuator 1100 may include a fixed-focus lens disposed in a predetermined lens barrel (not shown). The fixed-focus lens may also be referred to as a "single-focal-length lens" or a "fixed-focus lens".

[0079] The first camera actuator 1100 can alter the optical path. In one embodiment, the first camera actuator 1100 can vertically alter the optical path using internal optical components (e.g., prisms or mirrors). For example, the optical components can change the direction of light from a first direction (X-axis direction) to a third direction (Z-axis direction). Alternatively, the optical components can change the axis of light from the first axis to a second axis. With this configuration, even if the thickness of the mobile terminal is reduced, a lens configuration with a size larger than the thickness of the mobile terminal can be provided in the mobile terminal by altering the optical path to perform magnification, autofocus (AF), zoom, and OIS functions.

[0080] This invention is not limited to this, and the first camera actuator 1100 can change the optical path vertically or at a predetermined angle multiple times.

[0081] The second camera actuator 1200 may be located at the rear end of the first camera actuator 1100. The second camera actuator 1200 may be coupled to the first camera actuator 1100. Furthermore, the second camera actuator 1200 and the first camera actuator 1100 may be coupled in various ways.

[0082] Furthermore, the second camera actuator 1200 can be a zoom actuator or an AF actuator. For example, the second camera actuator 1200 can support one or more lenses and move the lenses in response to a control signal from a predetermined control unit to perform an autofocus function or a zoom function.

[0083] Furthermore, one or more lenses can move independently or individually along the optical axis, and

[0084] Circuit board 1300 may be disposed at the rear end of the second camera actuator 1200. Circuit board 1300 may be electrically connected to the second camera actuator 1200 and the first camera actuator 1100. In addition, multiple circuit boards 1300 may be provided.

[0085] The camera module according to the implementation method may consist of one or more camera modules. For example, multiple camera modules may include a first camera module and a second camera module.

[0086] Furthermore, the first camera module may include one or more actuators. For example, the first camera module may include a first camera actuator 1100 and a second camera actuator 1200.

[0087] Furthermore, the second camera module can be housed in a predetermined housing (not shown) and includes an actuator (not shown) capable of driving the lens unit. The actuator can be a voice coil motor, a micro-actuator, a silicon actuator, etc., and can be applied in various ways, such as capacitive, thermal, dual piezoelectric wafer, and electrostatic methods, but is not limited to these methods. Additionally, in this specification, the camera actuator can be referred to as an actuator, etc. Furthermore, a camera module composed of multiple camera modules can be installed in various electronic devices such as mobile terminals. Furthermore, the actuator can be a device for moving or tilting lenses and optical components. Here, in the following description, the actuator is described as a concept, wherein the actuator includes a lens or optical component. Furthermore, the actuator can be referred to as a "lens transfer device," "lens motion device," "optical component transfer device," "optical component motion device," etc.

[0088] Reference Figure 3 According to the embodiments, the camera module may include a first camera actuator 1100 that performs OIS function and a second camera actuator 1200 that performs zoom function and AF function.

[0089] Light can enter the camera module or the first camera actuator through an opening in the upper surface of the first camera actuator 1100. That is, light can initially enter the first camera actuator 1100 in a vertical direction (e.g., based on the X-axis direction of the incident light), and the optical path can be changed to the optical axis direction (e.g., the Z-axis direction) by optical components. Furthermore, light can pass through the second camera actuator 1200 and can enter the image sensor (IS) located at one end of the second camera actuator 1200 (path). In this specification, the Z-axis direction or a third direction is described as the optical axis direction. Additionally, the first direction or X-axis direction is described as the vertical direction. Furthermore, the second direction or Y-axis direction is described as the horizontal direction.

[0090] In this specification, the bottom surface refers to a side portion in the first direction. Furthermore, the first direction is the X-axis direction in the accompanying drawings and can be used interchangeably with the second axis direction, etc. The second direction is the Y-axis direction in the accompanying drawings and can be used interchangeably with the first axis direction, etc. The second direction is perpendicular to the first direction. Additionally, the third direction is the Z-axis direction in the accompanying drawings and can be used interchangeably with the third axis direction, etc. Furthermore, the third direction is perpendicular to both the first and second directions. Here, the third direction (Z-axis direction) corresponds to the direction of the optical axis, and the first direction (X-axis direction) and the second direction (Y-axis direction) are directions perpendicular to the optical axis. Furthermore, the first camera actuator and the second camera actuator will be described below based on the optical axis direction being the third direction (Z-axis direction).

[0091] Furthermore, in this specification, the inner side can be one side in the direction from the cover CV toward the first camera actuator, and the outer side can be one side in the direction opposite to the inner side. That is, the first camera actuator and the second camera actuator can be located inside the cover CV, and the cover CV can be located outside the first camera actuator or the second camera actuator.

[0092] Furthermore, utilizing this configuration, the camera module according to the embodiment can improve the spatial constraints of the first and second camera actuators by changing the optical path. That is, the camera module according to the embodiment can expand the optical path in response to changes in the optical path while minimizing the thickness of the camera module. Moreover, it should be understood that the second camera actuator can also provide a wide range of magnifications by controlling the focal point, etc., in the expanded optical path.

[0093] Furthermore, the camera module according to the embodiment can achieve OIS by controlling the optical path via a first camera actuator, thereby minimizing the occurrence of eccentricity or tilt and producing optimal optical characteristics.

[0094] Furthermore, the second camera actuator 1200 may include an optical system and a lens driving unit. For example, at least one of the first lens assembly, the second lens assembly, and the third lens assembly may be disposed in the second camera actuator 1200.

[0095] Additionally, the second camera actuator 1200 may include a coil and a magnet for performing high-magnification zoom and autofocus functions.

[0096] For example, although the first and second lens assemblies can be movable lenses moved via coils, magnets, and guide pins, and the third lens assembly can be a fixed lens, the present invention is not limited thereto. For example, the third lens assembly can function as a focuser that forms an optical image at a specific location, and the first lens assembly can function as a transducer that re-forms the image formed in the third lens assembly as a focuser at different locations. On the other hand, the first lens assembly can have a significant magnification change due to significant changes in distance to the object or imaging distance, and the first lens assembly as a transducer can play an important role in the focal length or magnification change of the optical system. Simultaneously, the imaging point formed in the first lens assembly as a transducer can vary slightly depending on the position of the first lens assembly. Therefore, the second lens assembly can perform a position compensation function for the image formed using the transducer. For example, the second lens assembly can function as a compensator for accurately forming the imaging point formed in the first lens assembly as a transducer at the actual position of the image sensor. For example, the first and second lens assemblies can be driven by electromagnetic force due to the interaction of the coil and the magnet. The above description can be applied to the lens assemblies described below. Furthermore, the first to third lens assemblies can move along the optical axis, i.e., the third direction. Furthermore, the first to third lens assemblies can move independently or in relation to each other along the third direction. In this invention, the first and second lens assemblies can move along the optical axis. Furthermore, the third lens assembly can be located at the front end of the first lens assembly or the rear end of the second lens assembly. Furthermore, the third lens assembly may not move along the optical axis. That is, the third lens assembly can be a fixed unit. Furthermore, the first and second lens assemblies can be moving units.

[0097] Furthermore, when the actuators for OIS and AF / zoom are provided according to embodiments of the present invention, magnetic interference with the magnets for AF / zoom can be prevented when driving OIS. Since the first driving magnet of the first camera actuator 1100 is provided separately from the second camera actuator 1200, magnetic interference between the first camera actuator 1100 and the second camera actuator 1200 can be prevented. In this specification, OIS can be referred to interchangeably by terms such as image stabilization, optical image stabilization, optical image correction, and shake correction.

[0098] Specifically, in the first camera actuator 1100, the optical component RM can be tilted relative to the X-axis or the Y-axis. Therefore, the optical path can be easily changed according to the tilt of the X-axis or the tilt of the Y-axis.

[0099] The optical component RM can be housed in the holder of the first camera actuator. In embodiments, the optical component RM can be formed from a mirror or a prism. Although the following description is based on an optical component RM formed from a prism, the optical component RM can also be formed from multiple lenses as in the embodiments described above. Alternatively, the optical component RM can be formed from multiple lenses and prisms or mirrors. Furthermore, the optical component RM may include a reflector disposed therein. The invention is not limited thereto.

[0100] In the first camera actuator 1100, the optical component RM can be tilted relative to the X-axis or Y-axis by driving the VCM or the like. In other words, OIS can be achieved by tilting or rotating the optical component RM relative to the Y-axis direction or the X-axis direction.

[0101] Figure 4 This is a perspective view of the second camera actuator according to the embodiment. Figure 5 This is an exploded perspective view of the second camera actuator according to the embodiment. Figure 6 It is along Figure 4 A cross-sectional view of line DD' in the diagram. Figure 7a , Figure 7b and Figure 7c This is a perspective view of the housing in the second camera actuator according to the embodiment. Figure 8 and Figure 9 This is a view used to describe each drive of the lens assembly according to the embodiment, and Figure 10 This is a view used to describe the operation of the second camera actuator according to an embodiment.

[0102] Reference Figures 4 to 6 The second camera actuator 1200 (or camera device, zoom lens transfer device, zoom lens movement device, or lens transfer device) according to the embodiment may include a lens unit 1220, a housing 1230, a drive unit 1250, a base unit 1260, a substrate unit 1270, and stop members ST1 and ST2. Furthermore, the second camera actuator 1200 may also include a protective cover (not shown), an elastic unit (not shown), and a connecting member (not shown).

[0103] Additionally, the lens group can move along the optical axis, as described below. Furthermore, the lens group can be coupled to the lens assembly and move together along the optical axis. In this case, the second camera actuator may include a moving unit and a fixed unit, the moving unit moving along the optical axis like the lens group, and the fixed unit, unlike the moving unit, not moving along the optical axis and being relatively fixed. In this embodiment, the moving unit may include a lens assembly (e.g., a first lens assembly and a second lens assembly) and optical driving magnets (a first driving magnet and a second driving magnet). Furthermore, the fixed unit may include a housing, a substrate unit, optical driving coils (a first coil and a second coil), and a Hall sensor. Furthermore, the driving magnet may be disposed on either the moving unit or the fixed unit, and the driving coil may be disposed on the other. In response to this description, the movement distance of the lens assembly, as described below, may correspond to the movement distance of the moving unit.

[0104] A protective cover (not shown) may be located in a region (e.g., the outermost region) of the second camera actuator 1200 to surround the constituent elements (lens unit 1220, housing 1230, drive unit 1250, base unit 1260, substrate unit 1270, and image sensor IS disposed on a circuit board at the rear end of the second camera actuator 1200) as described below.

[0105] A protective shield (not shown) can block or reduce electromagnetic waves generated from the outside. Therefore, the occurrence of malfunctions in the drive unit 1250 can be reduced.

[0106] The lens unit 1220 can be located within a protective cover (not shown). The lens unit 1220 can move along a third direction (Z-axis or optical axis). Therefore, the aforementioned AF function or zoom function can be performed.

[0107] Additionally, the lens unit 1220 may be located within the housing 1230. Therefore, at least a portion of the lens unit 1220 may be movable within the housing 1230 along the optical axis or in a third direction (Z-axis direction).

[0108] Specifically, the lens unit 1220 may include a lens group 1221 and a moving component 1222.

[0109] First, the lens group 1221 may include one or more lenses. Furthermore, although multiple lens groups 1221 may be provided, the following description will be based on a single lens group.

[0110] The lens assembly 1221 can be connected to the moving assembly 1222 and can be moved along a third direction (Z-axis direction) by the electromagnetic force generated by the first magnet 1252a and the second magnet 1252b connected to the moving assembly 1222.

[0111] In one embodiment, lens group 1221 may include a first lens group 1221a, a second lens group 1221b, and a third lens group 1221c. The first lens group 1221a, the second lens group 1221b, and the third lens group 1221c may be arranged sequentially along the optical axis. Furthermore, lens group 1221 may also include a fourth lens group. The fourth lens group may be located at the rear end of the third lens group 1221c.

[0112] The first lens group 1221a can be connected and fixed to the housing (or fixing assembly) of 1-1. In other words, the first lens group 1221a can be stationary without moving along the optical axis.

[0113] The second lens group 1221b can be connected to the first lens assembly 1222a and can be moved along a third direction or optical direction. Magnification adjustment can be performed by moving the first lens assembly 1222a and the second lens group 1221b.

[0114] The third lens group 1221c can be connected to the second lens assembly 1222b and can be moved along a third direction or optical axis. Focusing or autofocus can be performed by moving the third lens group 1221c.

[0115] Here, the number of lens groups is not limited, and the fourth lens group described above may not exist, or additional lens groups other than the fourth lens group 1121d may be provided, etc.

[0116] The movable component 1222 may include an opening region surrounding the lens assembly 1221. The movable component 1222 can be used interchangeably with the first lens assembly and the second lens assembly. The movable component 1222 or the lens assembly can move within the housing 1230 along the optical axis (Z-axis direction). Furthermore, the movable component 1222 can be coupled to the lens assembly 1221 in various ways. Additionally, the movable component 1222 may include a groove located in its side surface, and can be coupled to the first magnet 1252a and the second magnet 1252b through the groove. Connecting members, etc., may be applied to the groove.

[0117] Additionally, the movable component 1222 can be connected to the elastic element (not shown) at its upper and rear ends. Therefore, the movable component 1222 can move along a third direction (Z-axis) while supported by the elastic element (not shown). That is, the position of the movable component 1222 can be maintained, and its orientation can be kept in the third direction (Z-axis). The elastic element (not shown) can be formed of various elastic elements, such as a leaf spring.

[0118] The movable component 1222 may be located in the housing 1230 and includes a first lens assembly 1222a and a second lens assembly 1222b.

[0119] The area where the third lens group is located in the second lens assembly 1222b can be located at the rear end of the first lens assembly 1222a. In other words, the area where the third lens group 1221c is located in the second lens assembly 1222b can be located between the area where the second lens group 1221b is located in the first lens assembly 1222a and the image sensor.

[0120] The first lens assembly 1222a and the second lens assembly 1222b may face the first guide groove and the second guide groove, respectively. The first guide groove and the second guide groove may be located in the first side portion 1232a and the second side portion 1232b of the housing 1230 (or housings 1-2) described below. For example, the first guide groove and the second guide groove may be formed in the first side portion and the second side portion of the housing, respectively. Alternatively, the component including the first guide groove and the second guide groove may be located in the first side portion and the second side portion of the housing, respectively.

[0121] Furthermore, optical driving magnets can be mounted on the outer surfaces of the first lens assembly 1222a and the second lens assembly 1222b. For example, the second magnet 1252b can be mounted on the outer surface of the second lens assembly 1222b. The first magnet 1252a can be mounted on the outer surface of the first lens assembly 1222a. In this specification, the first lens assembly 1222a can be interchangeably referred to as the "first coil holder," and the second lens assembly 1222b can be interchangeably referred to as the "second coil holder." Furthermore, the first coil holder 1222a may include a guiding unit, a first lens holder, and a coupling member. A detailed description of these is provided below.

[0122] The housing 1230 may be disposed between the lens unit 1220 and the protective cover (not shown). Alternatively, the housing 1230 may be disposed around the lens unit 1220.

[0123] The housing 1230 may include housing 1231 (1-1) and housing 1232 (1-2). Housing 1231 (1-1) may be connected to the first lens group 1221a and also to the aforementioned first camera actuator. Housing 1231 (1-1) may be located in front of housing 1232 (1-2). Housing 1231 (1-1) may be referred to as a "fixed assembly," "fixed lens assembly," "fixed lens receiving unit," etc. Housing 1232 (1-2) may be referred to as a "main lens barrel," "lens barrel," "lens barrel," etc.

[0124] Furthermore, housing 1232 can be located at the rear end of housing 1231. The first lens assembly, the second lens assembly, and the lens unit 1220 can be seated inside housing 1232.

[0125] The housing 1230 (or housings 1-2 1232) may have holes formed in its side portions. A first coil 1251a and a second coil 1251b may be disposed in the holes. The holes may be positioned to correspond to recesses in the movable assembly 1222 described above. In this case, a plurality of first coils 1251a and a plurality of second coils 1251b may be disposed.

[0126] In an embodiment, the housing 1230 (particularly, housings 1-2 1232) may include a first side portion 1232a and a second side portion 1232b. The first side portion 1232a and the second side portion 1232b may be positioned opposite each other. For example, the first side portion 1232a and the second side portion 1232b may be symmetrically arranged about a third direction. An optical drive coil 1251 may be positioned on the first side portion 1232a and the second side portion 1232b. Furthermore, a substrate unit 1270 may be mounted on the outer surfaces of the first side portion 1232a and the second side portion 1232b. In other words, the first substrate may be located on the outer surface of the first side portion 1232a, and the second substrate may be located on the outer surface of the second side portion 1232b.

[0127] Furthermore, the first guide groove and the second guide groove may be located in the first side portion 1232a and the second side portion 1232b of the housing 1230 (particularly housings 1-2 1232).

[0128] The first and second guide grooves can be one or more grooves (e.g., guide recesses) or recesses. Furthermore, a first spherical member B1 or a second spherical member B2 can be seated in the first or second guide groove within the groove or recess. The second camera actuator 1200 may also include a spherical member unit. The spherical member unit may include a first spherical member B1 and a second spherical member B2. The first and second lens assemblies can be moved along the optical axis direction by means of the spherical member unit. In this case, the spherical member unit may include one or more rolling members and spherical members. Furthermore, one or more spherical members can move along the first or second guide groove. Therefore, the first spherical member B1 or the second spherical member B2 can move in the first or second guide groove along a third direction (Z-axis direction).

[0129] Alternatively, the first spherical member B1 or the second spherical member B2 may move along a guide unit or track connected to the inner side of the first side portion 1232a of the housing 1230 or along a guide unit or track connected to the inner side of the second side portion 1232b of the housing 1230 in a third direction.

[0130] Therefore, the first lens assembly 1222a and the second lens assembly 1222b can move along a third direction or the optical axis. In this case, the second lens assembly 1222b can be positioned closer to or more closely to the image sensor than the first lens assembly 1222a.

[0131] According to the embodiment, the first spherical member B1 can contact the first lens assembly 1222a. The second spherical member B2 can contact the second lens assembly 1222b. Therefore, the first spherical member B1 and the second spherical member B2 can at least partially overlap in a first direction (X-axis direction) according to their positions.

[0132] Furthermore, the guide groove may include first guide grooves GG1a and GG1b facing the first recess. Additionally, the guide groove may include second guide grooves GG2a and GG2b facing the second recess RS2. The first guide grooves GG1a and GG1b, as well as the second guide grooves GG2a and GG2b, may be grooves extending along a third direction (Z-axis direction). Furthermore, multiple first guide grooves GG1a and GG1b and multiple second guide grooves GG2a and GG2b may be provided. Moreover, the multiple first guide grooves (or second guide grooves) may be grooves with different shapes. For example, one groove may be a groove with an inclined side surface, while another groove may be a groove with a side surface perpendicular to the bottom surface. Furthermore, multiple spherical elements having at least some different diameters may be located in the multiple guide grooves.

[0133] The second magnet 1252b can be positioned to face the second coil 1251b. Furthermore, the first magnet 1252a can be positioned to face the first coil 1251a.

[0134] For example, at least one of the first coil 1251a and the second coil 1251b can be composed of one or more coils. For example, the first coil 1251a can be composed of multiple coils. The second coil 1251b can be composed of multiple coils. Furthermore, even if the first coil and the second coil are a single coil, a long stroke, as will be described below, can be achieved.

[0135] In one embodiment, the optical drive coil 1251 may be composed of sub-coils arranged sequentially along the optical axis (Z-axis direction). For example, multiple sub-coils may be arranged sequentially along the optical axis on each side of the main lens barrel 1232.

[0136] In this embodiment, the optical drive coil 1251 may include a first drive unit and a second drive unit. The first drive unit can provide a driving force to move the first lens assembly 1222a along the optical axis. The first drive unit may include a first coil 1251a and a first magnet 1252a. Furthermore, the first drive unit may include a first drive coil and a first drive magnet. Therefore, the first coil 1251a may be referred to as the "first drive coil." Furthermore, the first magnet 1252a may be referred to as the "first drive magnet."

[0137] Furthermore, the second driving unit can provide a driving force to move the second lens assembly 1222b along the optical axis. The second driving unit may include a second coil 1251b and a second magnet 1252b.

[0138] Furthermore, the second driving unit may include a second driving coil and a second driving magnet. Therefore, the second coil 1251b may be referred to as the "second driving coil". Furthermore, the second magnet 1252b may be referred to as the "second driving magnet".

[0139] The elastic element (not shown) may include a first elastic member (not shown) and a second elastic member (not shown). The first elastic member (not shown) may be coupled to the upper surface of the moving assembly 1222. The second elastic member (not shown) may be coupled to the lower surface of the moving assembly 1222. Furthermore, the first elastic member (not shown) and the second elastic member (not shown) are formed as leaf springs as described above. Additionally, the first elastic member (not shown) and the second elastic member (not shown) can provide elasticity for the movement of the moving assembly 1222. However, the invention is not limited to the above-described locations, and the elastic element can be disposed in various locations.

[0140] Furthermore, the drive unit 1250 can provide a driving force to move the lens unit 1220 along a third direction (Z-axis). The drive unit 1250 may include an optical drive coil 1251 and an optical drive magnet 1252. The optical drive coil 1251 and the optical drive magnet 1252 may be positioned facing each other. For example, a first drive coil 1251a and a first drive magnet 1252a may be positioned facing each other. Additionally, a second drive coil 1251b and a second drive magnet 1252b may be positioned facing each other. The first drive coil 1251a may be disposed on one side of the housing along a second direction, and the second drive coil 1251b may be disposed on the other side of the housing along a second direction.

[0141] In addition, the drive unit 1250 may also include a Hall sensor unit. The Hall sensor unit 1253 may include one or more first Hall sensors 1253a and second Hall sensors 1253b, and may be located inside or outside the optical drive coil 1251.

[0142] The movable component can be moved along a third direction (Z-axis direction) using the electromagnetic force formed between the optical drive coil 1251 and the optical drive magnet 1252.

[0143] The optical drive coil 1251 may include a first coil 1251a and a second coil 1251b. Furthermore, as described above, the first coil 1251a and the second coil 1251b may be composed of multiple sub-coils. Additionally, the first coil 1251a and the second coil 1251b may be disposed in holes formed in the side portion of the housing 1230. Furthermore, the first coil 1251a and the second coil 1251b may be electrically connected to the substrate unit 1270. Therefore, the first coil 1251a and the second coil 1251b can receive supplied current, etc., through the substrate unit 1270.

[0144] In addition, the optical drive coil 1251 can be connected to the substrate unit 1270 via a magnetic yoke or the like.

[0145] Furthermore, in this embodiment, the optical drive coil 1251, together with the substrate unit 1270, is a fixed element. On the other hand, the optical drive magnet 1252 is a movable element that moves along the optical axis direction (Z-axis direction) together with the first and second components.

[0146] The optical drive magnet 1252 may include a first magnet 1252a and a second magnet 1252b.

[0147] In one embodiment, the first coil 1251a may include a first sub-coil SC1a and a second sub-coil SC2a. The first sub-coil SC1a and the second sub-coil SC2a may be arranged sequentially along the optical axis. The first sub-coil SC1a may be positioned closer to the first camera actuator than the second sub-coil SC2a.

[0148] Furthermore, the second coil 1251b may include a third sub-coil SC1b and a fourth sub-coil SC2b. The third sub-coil SC1b and the fourth sub-coil SC2b may be arranged sequentially along the optical axis. The third sub-coil SC1b may be positioned closer to the first camera actuator than the fourth sub-coil SC2b.

[0149] Furthermore, the first magnet 1252a can face the first sub-coil SC1a and the second sub-coil SC2a. The second magnet 1252b can face the third sub-coil SC1b and the fourth sub-coil SC2b. The first sub-coil SC1a can be positioned to overlap with the third sub-coil SC1b in a second direction. The second sub-coil SC2a can be positioned to overlap with the fourth sub-coil SC2b in a second direction. In this way, the first magnet 1252a and the second magnet 1252b can be arranged to face the two sub-coils in the same way.

[0150] Furthermore, in the second camera actuator, the coils of the first and second drive units can be described as including first sub-coils SC1a and SC1b and second sub-coils SC2a and SC2b. However, in the specification, the sub-coils driving the second lens assembly can be described interchangeably with the third and fourth sub-coils.

[0151] The first sub-coil SC1a and the second sub-coil SC2a can be arranged to be spaced apart from each other in the optical axis direction. The first sub-coil SC1a and the second sub-coil SC2a can be connected in parallel. For example, either end of the first sub-coil SC1a or either end of the second sub-coil SC2a can be connected to form a node. Furthermore, another end of the first sub-coil SC1a or another end of the second sub-coil SC2a can be connected to form another node. That is, the current applied to the first sub-coil SC1a and the second sub-coil SC2a can be distributed to each of the sub-coils. Therefore, the first sub-coil SC1a and the second sub-coil SC2a are electrically connected in parallel, which can reduce heat generation.

[0152] Furthermore, the polarity of a surface of the first driving magnet 1252a facing the first driving coils SC1a and SC2a can be the same as the polarity of a surface of the second driving magnet 1252b facing the second driving coils SC1b and SC2b. For example, the inner surfaces of the first driving magnet 1252a and the second driving magnet 1252b can have either N polarity or S polarity (e.g., N polarity). The outer surfaces of the first driving magnet 1252a and the second driving magnet 1252b can have either N polarity or S polarity (e.g., S polarity). Here, relative to the optical axis, the inner surface can be a side surface adjacent to the optical axis, and the outer surface can be a side surface away from the optical axis. Furthermore, the first magnet 1252a can have a first polarity on a first surface BSF1 facing the optical driving coil (e.g., the first coil). Furthermore, the first magnet 1252a can have a second polarity on a second surface BSF2, which is the opposite of the first surface BSF1. The second magnet 1252b may have a first polarity on a first surface BSF1 facing the optical drive coil (e.g., the second coil). Furthermore, the second magnet 1252b may have a second polarity on a second surface BSF2, which is the opposite of the first surface BSF1. The first polarity may be either N-polarity or S-polarity. Furthermore, the second polarity may be the other of N-polarity and S-polarity.

[0153] Alternatively, the first driving magnet and the second driving magnet may have a structure in which N polarity / S polarity or S polarity / N polarity are arranged sequentially in the optical axis direction.

[0154] Furthermore, the third sub-coil SC1b and the fourth sub-coil SC2b can be configured to be spaced apart from each other in the optical axis direction. The third sub-coil SC1b and the fourth sub-coil SC2b can be connected in parallel with each other. For example, either one end of the third sub-coil SC1b or the other end of the fourth sub-coil SC2b can be connected to form a node.

[0155] The first magnet 1252a and the second magnet 1252b can be disposed in the aforementioned groove of the moving assembly 1222 and can be positioned to correspond to the first coil 1251a and the second coil 1251b. Furthermore, the optical drive magnet 1252 can be coupled together with the yoke described below to the first lens assembly and the second lens assembly (or the moving assembly).

[0156] The base unit 1260 can be located between the lens unit 1220 and the image sensor on the circuit board. Components, such as filters, can be fixed to the base unit 1260. Alternatively, the base unit 1260 can be configured to surround the image sensor described above. With this configuration, the image sensor is protected from foreign matter, which improves the reliability of the device. However, this configuration is omitted in some of the accompanying drawings and will be described below.

[0157] Furthermore, the second camera actuator 1200 can be a zoom actuator or an autofocus actuator. For example, the second camera actuator can support one or more lenses and move the lenses in response to a control signal from a predetermined control unit to perform an autofocus function or a zoom function.

[0158] Furthermore, the second camera actuator can be a fixed zoom or a continuous zoom. For example, the second camera actuator can move the lens group 1221.

[0159] Furthermore, the second camera actuator can be composed of multiple lens assemblies. For example, in addition to the first lens assembly 1222a and the second lens assembly 1222b, the second camera actuator may also include one or more of a third lens assembly (not shown) and a guide pin (not shown). The above description can be applied here. Therefore, the second camera actuator can perform high-magnification zoom function via the drive unit.

[0160] The image sensor can be located inside or outside the second camera actuator. In one embodiment, the image sensor can be located outside the second camera actuator, as shown in the accompanying drawings. For example, the image sensor can be located on a circuit board. The image sensor can receive light and convert the received light into electrical signals. Furthermore, the image sensor can consist of multiple pixels arranged in an array. Additionally, the image sensor can be located on the optical axis.

[0161] The substrate unit 1270 can contact the side portion of the housing. For example, the substrate unit 1270 can be located on the outer surface (first side surface) of the first side portion and the outer surface (second side surface) of the second side portion of the housing, particularly housing 1-2, and can contact the first side surface and the second side surface.

[0162] The second camera actuator may also include first stops ST1a, ST1b and ST1c and second stops ST2a and ST2b, the first stops ST1a, ST1b and ST1c being disposed in one end (or front end), and the second stops ST2a and ST2b being disposed in the other end (or rear end) of the housing (or housing 1-2 1232).

[0163] The first stop ST1 may be located at one end of the housing. For example, the first stop ST1 may be located at the end of the 1-2 housing or the main lens barrel 1232 in the direction opposite to the optical axis. In an embodiment, the first stop ST1 may be located on the inner sidewall or inner wall of the housing or the main lens barrel 1232. The first stop ST1 may be located on the first inner wall of the first inner wall and the second inner wall of the main lens barrel 1232 facing each other in the optical axis direction. Furthermore, the first stop ST1 may include a 1-1 stop ST1a disposed on one side and a 1-2 stop ST1b disposed on the other side. For example, the 1-1 stop ST1a may be disposed on one side of the first inner wall. Furthermore, the 1-2 stop ST1b may be disposed on the other side of the first inner wall. The 1-1 stop ST1a may be positioned adjacent to the first side portion. The 1-2 stop ST1b may be positioned adjacent to the second side portion. The one side and the other side may refer to one side and the opposite side in the second direction.

[0164] Alternatively, the 1-1 stop ST1a and the guiding unit of the first lens assembly may overlap in the optical axis direction. The 1-2 stop ST1b and the lens protrusion of the first lens assembly may overlap in the optical axis direction.

[0165] Additionally, the first stop ST1 may include a 1-3 stop ST1c disposed on the other side of the main lens barrel 1232. The 1-3 stop ST1c may be positioned such that the 1-3 stop ST1c and the guiding unit of the second lens assembly 1222b overlap in the optical axis direction. The 1-2 stop ST1b may be located between the 1-3 stop ST1c and the 1-1 stop ST1a in the horizontal direction or in a second direction.

[0166] Additionally, the second stop ST2 can be disposed at another end of the 1-2 housing or the main lens barrel 1232. For example, the second stop ST2 can be located at the end of the 1-2 housing or the main lens barrel 1232 in the optical axis direction. In an embodiment, the second stop ST2 can be located on the inner sidewall or inner wall of the housing or the main lens barrel 1232. The second stop ST2 can be located on the second inner wall of the first inner wall and the second inner wall facing each other in the optical axis direction in the main lens barrel 1232. The first inner wall can be adjacent to the first camera actuator or the first lens assembly. The second inner wall can be adjacent to the image sensor.

[0167] Furthermore, the second stop ST2 may include a 2-1 stop ST2a disposed on one side and a 2-2 stop ST2b disposed on the other side. The 2-1 stop ST2a may be positioned adjacent to the first side portion. The 2-2 stop ST2b may be positioned adjacent to the second side portion. For example, the 2-1 stop ST2a may be disposed on one side of the first inner wall. Furthermore, the 2-2 stop ST2b may be disposed on the other side of the first inner wall.

[0168] Reference Figure 7a , Figure 7b and Figure 7c As described above, the housing 1230 (specifically, housings 1-2 1232) may include a first side portion 1232a and a second side portion 1232b. The first side portion 1232a and the second side portion 1232b may be positioned opposite each other. For example, the first side portion 1232a and the second side portion 1232b may be symmetrically arranged about a third direction. A second drive coil may be located on the first side portion 1232a and the second side portion 1232b. Furthermore, a second substrate unit may be mounted on the outer surfaces of the first side portion 1232a and the second side portion 1232b. The second substrate unit may be located outside the drive coil and electrically connected to the drive coil.

[0169] For example, the first substrate may be located on the outer surface of the first side portion 1232a, and the second substrate may be located on the outer surface of the second side portion 1232b.

[0170] Furthermore, the first guide grooves GG1a and GG1b, in which the first spherical member is seated, can be located in the inner surface (or first inner wall) of the first side portion 1232a. The first guide grooves GG1a and GG1b can face the aforementioned first recess. Similarly, the second guide grooves GG2a and GG2b, in which the second spherical member is seated, can be located in the inner surface (second inner wall) of the second side portion 1232b. The second guide grooves can face the aforementioned second recess.

[0171] Furthermore, the first side portion 1232a may include a first side hole 1232ah. A first magnet may be located in the first side hole 1232ah. Additionally, the first side hole 1232ah may have a length smaller than that of the first coil in a first direction.

[0172] Furthermore, the second side portion 1232b may include a second side hole 1232bh. A second magnet may be located within the second side hole 1232bh. Additionally, the second side hole 1232bh may have a length smaller than that of the second coil in the first direction.

[0173] In one embodiment, the first side portion 1232a of the housing 1232 may have an inner surface facing the guide unit of the first lens assembly. The guide unit of the first lens assembly (first guide unit) may be disposed on the side portion (first side portion) of the housing. The second side portion 1232b may also face the first side portion 1232a and have an inner surface. Therefore, the inner surface of the second side portion 1232b may face the second lens assembly. The guide unit of the second lens assembly (second guide unit) may be disposed on the side portion (second side portion) of the housing.

[0174] Furthermore, the first guide groove and the second guide groove, in which the spherical member is seated, can be located in the first side portion 1232a and the second side portion 1232b, respectively.

[0175] Furthermore, housing 1232 may include a housing hole provided in either its upper or lower portion. In an embodiment, housing 1232 may include an upper surface and a lower surface provided between a first side portion 1232a and a second side portion 1232b.

[0176] Furthermore, housing holes can be provided in the upper and lower surfaces. For example, housing holes may include a first hole 1232h1 and a second hole 1232h2. The first hole 1232h1 may be located in the upper surface of housing 1232. The second hole 1232h2 may be located in the lower surface of housing 1232. Therefore, the upper surface of housing 1232 may include the first hole 1232h1, and the lower surface of housing 1232 may include the second hole 1232h2.

[0177] Furthermore, the first lens assembly and the second lens assembly, as described below, can be easily connected through the housing hole, or inspections (e.g., visual inspections) can be performed on the first lens assembly and the second lens assembly.

[0178] Furthermore, the first guide grooves GG1a and GG1b located in the first side portion 1232a can extend along a third direction. Moreover, as described above, the first guide grooves GG1a and GG1b can have different shapes. For example, one of the first guide grooves GG1a can be an inclined groove, and the other guide groove GG1b can have a flat structure. This can also be applied to the second guide grooves GG2a and GG2b. The first spherical member and the second spherical member are seated in the inclined groove and the groove with the flat structure, such that the first lens assembly or the second lens assembly can move along the optical axis.

[0179] Reference Figure 8 and Figure 9The electromagnetic force will now be described based on a coil. In the camera device according to the embodiment, an electromagnetic force DEM1 can be generated between the first magnet 1252a and the first coil 1251a, causing the first lens assembly 1222a to move along a track located on the inner surface of the housing via the first spherical member B1 in a direction horizontal to the optical axis, i.e., the third direction (Z-axis direction), or in a direction opposite to the third direction. At this time, the first magnet 1252a and the second magnet 1252b will not move to the region facing the edges of the first and second sub-coils. Therefore, the electromagnetic force is formed based on the flow of current in the region adjacent to the first and second sub-coils.

[0180] As described above, in the camera device according to the embodiment, the first magnet 1252a can be provided in the first lens assembly 1222a using, for example, a unipolar magnetization method. For example, in the embodiment, the surface (first surface) facing the outer surface of the first magnet 1252a can be of S polarity. Furthermore, the outer surface of the first magnet 1252a can be the surface facing the first coil 1251a. Furthermore, the surface opposite to the first surface can be of N polarity. Therefore, only one of N polarity and S polarity can be positioned facing the first coil 1251a. Here, the following description will be based on the assumption that the outer surface of the first magnet 1252a is of S polarity. Furthermore, the first coil 1251a can be composed of multiple sub-coils, and current can flow in opposite directions in the multiple sub-coils. That is, in the region of the first sub-coil SC1a adjacent to the second sub-coil SC2a, current can flow in the same manner as in "DE1".

[0181] In other words, the first region of the first sub-coil SC1a and the second region of the second sub-coil SC2a can have the same current direction. The first region of the first sub-coil SC1a is the region in which the first region and the first driving magnet 1252a overlap in a direction perpendicular to the optical axis (second direction) and are arranged perpendicular to the optical axis (e.g., arranged in the first direction). The second region of the second sub-coil SC2a is the region in which the second region and the first driving magnet 1252a overlap in a direction perpendicular to the optical axis (second direction) and are arranged perpendicular to the optical axis (e.g., arranged in the first direction).

[0182] Furthermore, as shown in the accompanying drawings, in an embodiment, when a magnetic force is applied from the S polarity of the first magnet 1252a along the second direction (Y-axis direction) and a current DE1 flows in the first coil 1251a along the first direction (X-axis direction), the electromagnetic force DEM1 can act along the third direction (Z-axis direction) according to the interaction of electromagnetic forces (e.g., Fleming's left-hand rule).

[0183] At this time, since the first coil 1251a is fixed to the side portion of the housing, the first lens assembly 1222a, in which the first magnet 1252a is provided, can move in the opposite direction to the Z-axis direction using electromagnetic force DEM1, depending on the direction of the current. In other words, the optical drive magnet can move in the opposite direction to the electromagnetic force applied to the optical drive coil. Furthermore, the direction of the electromagnetic force can vary depending on the current in the coil and the magnetic force of the magnet.

[0184] Therefore, the first lens assembly 1222a can be moved along a track located on the inner surface of the housing in a third direction or in a direction parallel to the optical axis (in both directions) by the first spherical member. In this case, the electromagnetic force DEM1 can be controlled to be proportional to the current DE1 applied to the first coil 1251a.

[0185] The first lens assembly 1222a or the second lens assembly 1222b may include a first recess RS1, in which a first spherical member or a second spherical member is seated. Additionally, the first lens assembly 1222a or the second lens assembly 1222b may include a second recess RS2, in which a first spherical member or a second spherical member is seated. Multiple first recesses RS1 and multiple second recesses RS2 may be provided. The length of the first recess RS1 in the optical axis direction (Z-axis direction) can be preset. Furthermore, the length of the second recess RS2 in the optical axis direction (Z-axis direction) can be preset. Therefore, the first spherical member and the second spherical member can have an adjustable movement distance in the recess in the optical axis direction. In other words, the first recess RS1 or the second recess RS2 can be a stop for the first spherical member or the second spherical member.

[0186] Furthermore, in the camera device according to the embodiment, the second magnet 1252b can be disposed in the second lens assembly 1222b using, for example, a unipolar magnetization method.

[0187] Furthermore, the first coil 1251a can be composed of multiple sub-coils, and current can flow in opposite directions in the multiple sub-coils. That is, in the region of the first sub-coil SC1a adjacent to the second sub-coil SC2a, current can flow in the same manner as in "DE1".

[0188] Furthermore, in this embodiment, either the N-polarity or the S-polarity of the second magnet 1252b can be positioned facing the second coil 1251b. Additionally, in this embodiment, the surface (first surface) facing the outer surface of the second magnet 1252b can be S-polarity. Alternatively, the first surface can be N-polarity. As shown in the accompanying drawings, the following description will be based on the assumption that the first surface is N-polarity.

[0189] Furthermore, the second coil 1251b can be composed of multiple sub-coils, and current can flow in opposite directions in the multiple sub-coils. That is, in the region of the first sub-coil SC1b adjacent to the second sub-coil SC2b, current can flow in the same manner as in "DE2".

[0190] In the implementation, when a magnetic force DM2 is applied from the first surface (N polarity) of the second magnet 1252b in the second direction (Y-axis direction) and a current DE2 flows from the second coil 1251b corresponding to the N polarity along the first direction (X-axis direction), the electromagnetic force DEM2 can act along the third direction (Z-axis direction) according to the interaction of electromagnetic forces (e.g., Fleming's left-hand rule).

[0191] At this time, since the second coil 1251b is fixed to the side portion of the housing, the second lens assembly 1222b, in which the second magnet 1252b is provided, can move in a direction opposite to the Z-axis direction using the electromagnetic force DEM2, depending on the direction of the current. For example, as described above, the direction of the electromagnetic force can vary depending on the current in the coil and the magnetic force of the magnet. Therefore, the second lens assembly 1222b can be moved along a track located on the inner surface of the housing by the second spherical member B2 in a direction parallel to the third direction (Z-axis direction). In this case, the electromagnetic force DEM2 can be controlled to be proportional to the current DE2 applied to the second coil 1251b.

[0192] Reference Figure 10 In the camera device according to the embodiment, the driving unit can provide driving forces F3A, F3B, F4A, and F4B to move the first lens assembly 1222a and the second lens assembly 1222b of the lens unit 1220 along a third direction (Z-axis direction). The driving unit may include the optical driving coil 1251 and the optical driving magnet 1252 as described above. Furthermore, the lens unit 1220 can be moved along a third direction (Z-axis direction) using the electromagnetic force formed between the optical driving coil 1251 and the optical driving magnet 1252.

[0193] At this time, the first coil 1251a and the second coil 1251b can be disposed in holes formed in the side portions (e.g., the first side portion and the second side portion) of the housing 1230. Furthermore, the second coil 1251b can be electrically connected to the first substrate 1271. The first coil 1251a can be electrically connected to the second substrate 1272. Therefore, the first coil 1251a and the second coil 1251b can receive drive signals (e.g., current) supplied from a drive-type driver on the circuit board of the circuit board 1300 via the substrate unit 1270.

[0194] At this time, the first lens assembly 1222a, on which the first magnet 1252a is mounted, can move along the third direction (Z-axis direction) using the electromagnetic forces F3A and F3B between the first coil 1251a and the first magnet 1252a. In addition, the second lens group 1221b, which is located in the first lens assembly 1222a, can also move along the third direction.

[0195] Furthermore, the second lens assembly 1222b, on which the second magnet 1252b is mounted, can be moved along a third direction (Z-axis direction) using the electromagnetic forces F4A and F4B between the second coil 1251b and the second magnet 1252b. Additionally, the third lens group 1221c, located within the second lens assembly 1222b, can also be moved along a third direction.

[0196] Therefore, as described above, the focal length or magnification of the optical system can be changed by moving the second lens group 1221b and the third lens group 1221c. In this embodiment, the magnification can be changed by moving the second lens group 1221b. In other words, zooming can be achieved. Furthermore, the focus can be adjusted by moving the third lens group 1221c. In other words, autofocus can be achieved.

[0197] In addition, depending on the movement method of the second lens group (or the third lens group), the second camera actuator can be a fixed zoom type or a continuous zoom type.

[0198] Furthermore, the first Hall sensor 1253a and the second Hall sensor 1253b may be disposed at at least one of the first sub-coil and the second sub-coil. For example, the first Hall sensor 1253a and the second Hall sensor 1253b may overlap in the second direction. Alternatively, the first Hall sensor 1253a and the second Hall sensor 1253b may not overlap in the second direction. Alternatively, the first Hall sensor 1253a and the second Hall sensor 1253b may partially overlap in the second direction.

[0199] Driven by the first lens assembly, the first lens assembly 1222a can be positioned as close as possible to the first stop members ST1a and ST1b. This reduces the distance between the guide unit in the first lens assembly 1222a and the 1-1 stop member ST1a. Additionally, the distance between the 1-2 stop member ST1b and the lens protrusion of the first lens assembly can also be reduced.

[0200] In other words, when the first lens assembly 1222a moves to its maximum extent toward the first camera actuator side, the first lens assembly 1222a can collide with the 1-1 stop ST1a and the 1-2 stop ST1b. Due to the movement of the first lens assembly, the 1-1 stop and the 1-2 stop can collide with the first lens assembly simultaneously or sequentially. In this embodiment, due to the movement of the first lens assembly, the 1-1 stop and the 1-2 stop can collide with the first lens assembly simultaneously.

[0201] Therefore, even when a lens made of glass is provided in the first lens assembly 1222a (or the second lens assembly) (e.g., at the foremost end), collisions with the first lens assembly 1222a (or the second lens assembly) at its maximum movement position (mechanical position) can be minimized. In other words, damage to the lens can be suppressed. For example, at least one of the first lens assembly and the second lens assembly may include a lens containing glass. Furthermore, the glass may be located at the outermost part of either the first lens assembly or the second lens assembly.

[0202] In the modified example, in the case of sequential collisions, the impact can be primarily absorbed by the guide unit with a large volume, thereby minimizing damage to the first lens assembly.

[0203] Similarly, the 2-2 stop ST2b can collide with the second lens assembly 1222b. That is, when the second lens assembly 1222b moves to its maximum extent toward the image sensor or along the optical axis, it can collide with both the 2-2 stop ST2b and the 2-1 stop ST2a. Therefore, even when a glass lens is provided in the second lens assembly 1222b, the collision with the first lens assembly 1222a at its maximum movement position (mechanical position) can be minimized. In other words, lens damage can be suppressed. This also applies to the modified example.

[0204] In other words, when the first lens assembly 1222a moves, the 1-1 stop ST1a and 1-2 stop ST1b can contact the first lens assembly 1222a. When the first lens assembly 1222a is moved to its maximum extent in a mechanical-mechanical manner, the first lens assembly 1222a can contact the first stop ST1a and ST1b. For example, the first lens assembly 1222a can be moved to an end portion in the optical axis direction or an end portion in the direction opposite to the optical axis direction. At this time, the first lens assembly 1222a can be moved to a position where it contacts the first stop or the second stop. For example, when the first lens assembly 1222a moves, the camera module can be in a telephoto or wide-angle state. When the first lens assembly 1222a contacts or is as close as possible (with tolerance) to the first stop, the camera module can be in a wide-angle state, and when the first lens assembly 1222a contacts or is as close as possible (with tolerance) to the second stop, the camera module can be in a telephoto state.

[0205] Furthermore, when the second lens assembly 1222b moves along the optical axis, the stop ST1c of the 1-3 can contact the second lens assembly 1222b.

[0206] In this way, the impact caused by the movement of the first lens assembly 1222a and the second lens assembly 1222b can be reduced due to the first stop. Therefore, as described above, the reliability of the first lens assembly 1222a and the second lens assembly 1222b, as well as the reliability of the second lens group and the third lens group therein, can be improved. Furthermore, since the range of motion of the first lens assembly 1222a and the second lens assembly 1222b can be limited, drive for precise magnification and the like can be realized.

[0207] Figure 11 This is a perspective view of a portion of the configuration of the second camera actuator according to an embodiment.

[0208] Reference Figure 11 The first lens assembly 1222a and the second lens assembly 1222b can be configured to be spaced apart in the optical axis direction (Z-axis direction).

[0209] The second guide groove can be configured opposite to the first guide groove. In an embodiment, the first and second guide grooves can at least partially overlap in a second direction (Y-axis direction). This configuration improves the spatial efficiency of the drive unit used to move the first and second lens assemblies in the second camera actuator, making it easier to miniaturize the second camera actuator.

[0210] The first guide groove may have a first spherical member, a first coil, etc., arranged adjacent to it as described above, and the second guide groove may have a second spherical member, a second coil, etc., arranged adjacent to it as described above.

[0211] Furthermore, according to the embodiments, the first lens assembly 1222a and the second lens assembly 1222b may include magnetic yokes YK1 and YK2 respectively disposed on their side surfaces.

[0212] A first magnetic yoke YK1 may be located on the side surface of a first lens assembly 1222a. A second magnetic yoke YK2 may be located on the side surface of a second lens assembly 1222b. At least a portion of the first magnetic yoke YK1 and at least a portion of the second magnetic yoke YK2 may extend outward. Therefore, the first magnetic yoke YK1 may surround at least a portion of the side surface of the first magnet 1252a. As shown in the figures, the first magnetic yoke YK1 may be formed with various structures, wherein the first magnetic yoke YK1 surrounds a portion of the inner surface and the side surface of the first magnet 1252a. For example, the first magnetic yoke YK1 is formed by partition members, and each partition member may be located on the inner surface and the side surface of the first magnet 1252a. Therefore, the connection force between the unipolar magnetized optical drive magnet and the magnetic yoke can be improved. Similarly, the second magnetic yoke YK2 may surround at least a portion of the side surface of the second magnet 1252b. As shown in the accompanying drawings, the second magnetic yoke YK2 can be formed with various structures, wherein the second magnetic yoke YK2 surrounds a portion of the inner surface and the side surface of the second magnet 1252b. For example, the second magnetic yoke YK2 can be formed of partition members, and each partition member can be located on both the inner and side surfaces of the second magnet 1252b.

[0213] In addition, the yoke can be positioned to connect both the optical drive magnet and the optical drive coil.

[0214] Furthermore, multiple spherical members can be located on the outer surface of the lens assembly. As described above, the first spherical member can be located on the outer surface of the first lens assembly 1222a. The second spherical member can be located on the outer surface of the second lens assembly 1222b.

[0215] Multiple first spherical elements and multiple second spherical elements can be provided. For example, multiple first spherical elements can be arranged side by side in a recess of the first lens assembly 1222a in the optical axis direction (Z-axis direction). In addition, multiple second spherical elements can be arranged side by side in a recess of the second lens assembly 1222b in the optical axis direction (Z-axis direction).

[0216] For example, the second spherical member B2 may include a first sub-spherical member B2a, a second sub-spherical member B2b, and a third sub-spherical member B2c. The first sub-spherical member B2a, the second sub-spherical member B2b, and the third sub-spherical member B2c may be arranged side by side in the optical axis direction. Therefore, the first sub-spherical member B2a, the second sub-spherical member B2b, and the third sub-spherical member B2c may at least partially overlap each other in the optical axis direction.

[0217] Furthermore, the first sub-spherical member B2a and the second sub-spherical member B2b among the plurality of spherical members can be located at the edge. The third sub-spherical member B2c can be located between the first sub-spherical member B2a and the second sub-spherical member B2b.

[0218] Multiple spherical components may have the same diameter or different diameters. For example, at least some of the first sub-spherical component B2a, the second sub-spherical component B2b, and the third sub-spherical component B2c may have the same diameters R1, R3, and R2. Furthermore, the first sub-spherical component B2a, the second sub-spherical component B2b, and the third sub-spherical component B2c may have different diameters R1, R3, and R2.

[0219] In this embodiment, among the plurality of spherical members, the diameters R1 and R3 of the spherical members located at the edges (the first and second sub-spherical members) can be smaller than the diameter R2 of the spherical member located on the inner side (the third sub-spherical member). For example, the diameter R1 of the first sub-spherical member B2a and the diameter R3 of the second sub-spherical member B2b can be smaller than the diameter R2 of the third sub-spherical member B2c. Using this configuration, the movement of the lens assembly caused by the plurality of spherical members can be accurately executed without tilting to one side.

[0220] The description of multiple spherical parts can be applied equally to the first spherical part.

[0221] Furthermore, as described above, the plurality of optically driven magnets can be composed of a first magnet and a second magnet. Moreover, the first magnet and the second magnet can be opposite each other and have the same polarity disposed on their exteriors. That is, the first surface (outer surface) of the first magnet and the first surface (outer surface) of the second magnet can be of a first polarity. Furthermore, the second surface (inner surface) of the first magnet and the second surface (inner surface) of the second magnet can be of a second polarity.

[0222] Figure 12 This is a view showing the optical drive coil, optical drive magnet, and magnetic yoke according to an embodiment. Figure 13 This is a view used to describe the movement of an optically driven magnet using a drive unit according to an embodiment, and Figure 13 This is a view used to describe the movement of the second lens assembly and the third lens assembly according to the embodiment.

[0223] Reference Figure 12 and Figure 13 The length W5 of the first sub-coil SC1a in the optical axis direction (Z-axis direction) can be the same as the length W6 of the second sub-coil SC2a in the optical axis direction (Z-axis direction). With this configuration, driving force control by the first sub-coil SC1a and the second sub-coil SC2a can be easily performed.

[0224] Furthermore, the total length W1 (or maximum length) of the optical drive coil in the optical axis direction (Z-axis direction) can be greater than the length W2 (or maximum length) of the optical drive magnet 1252a in the optical axis direction (Z-axis direction). This configuration allows for maximizing the stroke of the optical drive magnet. Additionally, a unipolar magnetized optical drive magnet can be used to perform long strokes.

[0225] Furthermore, in the embodiment, the maximum movement distance MD of the first lens assembly in the optical axis direction can be greater than the length of the hole (or hollow portion) of the first sub-coil SC1a in the short axis direction (first direction), and equal to or less than the length W3 of the hole (or hollow portion) of the first sub-coil SC1a in the long axis direction (optical axis direction or third direction).

[0226] Furthermore, the maximum movement distance MD of the first lens assembly can be greater than the length of the hole (or hollow portion) of the second sub-coil SC2a in the short axis direction (first direction), and equal to or less than the length W4 of the hole (or hollow portion) of the second sub-coil SC2a in the long axis direction (optical axis direction or third direction).

[0227] Furthermore, in the embodiment, the maximum movement distance of the second lens assembly in the optical axis direction can be greater than the length of the hole (or hollow portion) of the third sub-coil SC1b in the short axis direction (first direction), and equal to or less than the length of the hole (or hollow portion) of the third sub-coil SC1b in the long axis direction (optical axis direction or third direction).

[0228] Furthermore, the maximum movement distance of the first lens assembly can be greater than the length of the hole (or hollow portion) of the fourth sub-coil SC2b in the short axis direction (first direction), and equal to or less than the length of the hole (or hollow portion) of the fourth sub-coil SC2b in the long axis direction (optical axis direction or third direction).

[0229] Furthermore, the length W3 of the inner hole of the first sub-coil SC1a in the optical axis direction and the length W4 of the inner hole of the second sub-coil SC2a in the optical axis direction can be the same.

[0230] Furthermore, the length W2 of the driving magnet 1252a in the optical axis direction (Z-axis direction) can be greater than the length W3 of the inner hole of the first sub-coil SC1a in the optical axis direction. Furthermore, the length W2 of the driving magnet 1252a in the optical axis direction (Z-axis direction) can be greater than the length W4 of the inner hole of the second sub-coil SC2a in the optical axis direction. In this way, the optical driving magnet can move along the optical axis along the entire length of the optical driving coil in the optical axis direction.

[0231] Furthermore, the length W2 of the optical driving magnet (or the first driving magnet and the second driving magnet) in the optical axis direction (Z-axis direction) can be greater than the length W3 or W4 of any hollow portion in the hollow portion (or hole) of each sub-coil (first sub-coil to fourth sub-coil) in the optical axis direction.

[0232] The length W2 (maximum length) of the optical drive magnet in the optical axis direction (Z-axis direction) can be less than the length W5 of the first sub-coil SC1a in the optical axis direction (Z-axis direction).

[0233] This configuration prevents back electromotive force from being generated due to the movement of the lens assembly along the optical axis and enables long strokes.

[0234] The length (maximum length) W2 of the optical driving magnet (or the first driving magnet and the second driving magnet) in the optical axis direction (Z-axis direction) can be 0.6 times or less than the maximum length W1 of the corresponding first driving coil in the optical axis direction. Preferably, the length (maximum length) W2 of the optical driving magnet (or the first driving magnet and the second driving magnet) in the optical axis direction (Z-axis direction) can be 0.55 times or less than the maximum length W1 of the corresponding first driving coil in the optical axis direction. More preferably, the length (maximum length) W2 of the optical driving magnet (or the first driving magnet and the second driving magnet) in the optical axis direction (Z-axis direction) can be 0.5 times or less than the maximum length W1 of the corresponding first driving coil in the optical axis direction. Therefore, the camera device can provide a long stroke with minimal back electromotive force.

[0235] The maximum movement distance MD of the first lens assembly in the optical axis direction can be less than the length (maximum length) W2 of the optical driving magnet (or the first driving magnet and the second driving magnet) in the optical axis direction (Z-axis direction). For example, the maximum movement distance MD of the first lens assembly in the optical axis direction can be 0.66 times or greater and 0.92 times or less than the length (maximum length) W2 of the optical driving magnet (or the first driving magnet and the second driving magnet) in the optical axis direction (Z-axis direction). In this way, the generation of back electromotive force can be suppressed as much as possible.

[0236] Furthermore, in this embodiment, the total length W1 (or maximum length) of the optical drive coil in the optical axis direction (Z-axis direction) can be 18 mm to 20 mm. Furthermore, the length W2 of the optical drive magnet in the optical axis direction (Z-axis direction) can be 8 mm to 12 mm. Furthermore, the length W3 of the hole (or hollow portion) of the first sub-coil SC1a in the major axis direction (optical axis direction or a third direction) can be 5.6 mm to 8.7 mm. Furthermore, the length W4 of the hole (or hollow portion) of the second sub-coil SC2a in the major axis direction (optical axis direction or a third direction) can be 5.6 mm to 8.7 mm.

[0237] The length W5 of the first sub-coil SC1a in the optical axis direction (Z-axis direction) can be 8 mm to 10 mm. However, as mentioned above, the length W5 of the first sub-coil SC1a in the optical axis direction (Z-axis direction) can be greater than or equal to the length (W2) of the optical drive magnet in the optical axis direction (Z-axis direction).

[0238] Furthermore, the length W6 of the second sub-coil SC2a in the optical axis direction (Z-axis direction) can be 8 mm to 10 mm. However, as mentioned above, the length W5 of the second sub-coil SC2a in the optical axis direction (Z-axis direction) can be greater than or equal to the length (W2) of the optical drive magnet in the optical axis direction (Z-axis direction).

[0239] Furthermore, in the implementation, the current can flow in different directions in the first sub-coil SC1a and the second sub-coil SC2a according to the monopole magnetization of the optical drive magnet. For example, the current can flow in either the clockwise or counterclockwise direction in the first sub-coil SC1a, and the current can flow in either the clockwise or counterclockwise direction in the second sub-coil SC2a.

[0240] Furthermore, the length W2 of the optical driving magnet in the optical axis direction (Z-axis direction) can be greater than the movement distance of the lens assembly in the optical axis direction. That is, the length W2 of the optical driving magnet in the optical axis direction (Z-axis direction) can be greater than the maximum movement distance of either the first or second lens assembly. Using this configuration, a driving force for movement along the optical axis direction can be safely provided.

[0241] Furthermore, as described above, multiple lens assemblies can be provided, and the last lens assembly among the multiple lens assemblies can have a greater movement distance in the optical axis direction than the first lens assembly among the multiple lens assemblies.

[0242] For example, the movement distance of the first lens assembly 1222a in the optical axis direction can be less than the movement distance of the second lens assembly 1222b in the optical axis direction. In other words, the movement distance of the second lens assembly 1222b in the optical axis direction can be greater than the movement distance of the first lens assembly in the optical axis direction. The first lens assembly 1222a can be located at the front end of the second lens assembly 1222b.

[0243] Furthermore, in the camera actuator according to the embodiment, the optical drive magnet 1252a can be moved from "center" to "maximum movement 1" or "maximum movement 2". Here, in the "center" case, the optical drive magnet 1252a can overlap with the first sub-coil SC1a and the second sub-coil SC2a in a second direction. In other words, both the first sub-coil SC1a and the second sub-coil SC2a can face the optical drive magnet.

[0244] Furthermore, since the sub-coil is a coil extending along the first direction, in which a driving force due to actual electromagnetic force is provided, the overlapping area of ​​the first sub-coil SC1a and the optical driving magnet 1252a can be the same as the overlapping area of ​​the second sub-coil SC2a and the optical driving magnet 1252a. Therefore, the generation of back electromotive force is minimized, enabling a long stroke.

[0245] Furthermore, the "maximum motion 1" case can correspond to the case where the optical drive magnet 1252a moves to its maximum extent in the direction opposite to the third direction (Z-axis direction). In this case, the overlapping area of ​​the optical drive magnet 1252a and the first sub-coil SC1a can be larger than the overlapping area of ​​the optical drive magnet 1252a and the second sub-coil SC2a. Furthermore, the inner holes of the optical drive magnet 1252a and the first sub-coil SC1a can at least partially overlap. More specifically, the optical drive magnet 1252a can be spaced apart from the edge of the inner hole of the first sub-coil SC1a by a predetermined separation distance GP2 in the optical axis direction. Using this configuration, the back electromotive force generated at the end portion of the first sub-coil SC1a can be reduced. For example, the optical drive magnet 1252a can move to the region where the end portions of the optical drive magnet 1252a and the first sub-coil SC1a in the direction opposite to the optical axis do not overlap in the second direction (Y-axis direction) with maximum stroke.

[0246] Furthermore, the "maximum movement 2" case corresponds to the case where the optical drive magnet 1252a moves to its maximum extent along a third direction (Z-axis direction). In this case, the overlapping area of ​​the optical drive magnet 1252a and the second sub-coil SC2a can be larger than the overlapping area of ​​the optical drive magnet 1252a and the first sub-coil SC1a. Furthermore, the inner holes of the optical drive magnet 1252a and the second sub-coil SC2a can at least partially overlap. More specifically, the edge of the inner hole of the optical drive magnet 1252a can be spaced apart from the edge of the inner hole of the second sub-coil SC2a by a predetermined separation distance GP1 in the optical axis direction. Using this configuration, the back electromotive force generated at the end portion of the second sub-coil SC2a can be reduced. For example, the optical drive magnet 1252a can move to its maximum stroke to a region where the end portions of the optical drive magnet 1252a and the second sub-coil SC2a in the direction opposite to the optical axis direction do not overlap in the second direction (Y-axis direction).

[0247] Therefore, even when the length of the optical drive magnet 1252a in the optical axis direction is set small, the long stroke of the camera actuator can be effectively achieved by unipolar magnetization and the direction of the current in multiple optical drive coils.

[0248] Furthermore, the maximum movement distance of the optical drive magnet 1252a can correspond to the lengths of the first and second recesses in the optical axis direction for accommodating the first or second spherical member in the first lens assembly. Additionally, the maximum movement distance of the optical drive magnet 1252a can correspond to the distance the optical drive magnet 1252a moves from maximum movement 1 along the optical axis direction (Z-axis direction) to maximum movement 2. Alternatively, the maximum movement distance of the optical drive magnet 1252a can correspond to the spacing between the stops that restrict the movement of the first or second spherical member in the optical axis direction. Alternatively, the maximum movement distance of the optical drive magnet 1252a can correspond to the maximum distance the coil frame can move, and can correspond to the separation distance in the optical axis direction between the stops relative to the coil frame located in the optical axis direction and the stops located in the opposite direction to the optical axis direction.

[0249] Furthermore, the maximum movement distance of the optical drive magnet 1252a can correspond to twice the distance the optical drive magnet 1252a moves from the center to the maximum movement distance 1. Additionally, the movement distance of the optical drive magnet 1252a according to the embodiment can be -6mm to +6mm relative to the center. Here, the movement distance in the optical axis direction starting from the center is marked with "+", and the movement distance in the direction opposite to the optical axis direction is marked with "-". Therefore, the optical drive magnet 1252a (or at least one of the first lens assembly and the second lens assembly) according to the embodiment can move in the optical axis direction within the range of 0mm to 12mm. Furthermore, the aforementioned maximum movement distance can correspond to the maximum stroke of the lens assembly in the camera module.

[0250] Figure 14 This is a perspective view of the first lens assembly, the first connecting member, the second connecting member, and the second lens assembly according to the embodiment.

[0251] Reference Figure 14 The first lens assembly 1222a and the second lens assembly 1222b can be configured to be spaced apart in the optical axis direction (Z-axis direction). Furthermore, the first lens assembly 1222a and the second lens assembly 1222b can be moved along the optical axis direction (Z-axis direction) using a drive unit. For example, autofocus or zoom functions can be performed by the movement of the first lens assembly 1222a and the second lens assembly 1222b.

[0252] Furthermore, the first lens assembly 1222a may include a first lens holder LAH1 for holding and connecting the second lens group 1221b. The first lens holder LAH1 may be connected to the second lens group 1221b. Additionally, the first lens holder LAH1 may include a first lens aperture LH1 for receiving the second lens group 1221b. That is, the second lens group 1221b, comprising one or more lenses, may be disposed in the first lens aperture LH1. The first lens holder LAH1 is identical to the receiving portion (e.g., the first receiving portion and the second receiving portion) described below and can be used interchangeably with the receiving portion.

[0253] Furthermore, the second lens assembly 1222b may include a second lens holder LAH2 for holding and connecting the third lens group 1221c. Additionally, the second lens holder LAH2 may include a second lens aperture LH2 for receiving the third lens group 1221c. That is, one or more lenses may be disposed in the second lens aperture LH2.

[0254] In an embodiment, the first lens assembly 1222a and the second lens assembly 1222b may include outer surfaces adjacent to each other. The first lens assembly 1222a may include a first outer surface MM1, and the second lens assembly 1222b may include a second outer surface MM2. The first outer surface MM1 may be the bottom surface of the first lens holder LAH1 relative to the optical axis direction (Z-axis direction). Furthermore, the third outer surface MM3, described below, may be the upper surface of the first lens holder LAH1. Additionally, the second outer surface MM2 may be the upper surface of the second lens holder LAH2, and the fourth outer surface MM4 may be the bottom surface of the second lens holder LAH2.

[0255] Furthermore, the first outer surface MM1 and the second outer surface MM2 may at least partially overlap in the optical axis direction (Z-axis direction). In an embodiment, the first outer surface MM1 to the fourth outer surface MM4 may at least partially overlap each other in the optical axis direction (Z-axis direction).

[0256] For example, the connecting member (not shown) may contact at least one of the first outer surface MM1 and the second outer surface MM2.

[0257] Figure 15 This is an exploded perspective view of the first lens assembly according to the embodiment. Figure 16 This is a perspective view of the first lens assembly according to the embodiment. Figure 17 This is another perspective view of the first lens assembly according to the embodiment. Figure 18 This is a view used to illustrate the structure of the first lens holder and the guide portion in the first lens assembly according to an embodiment, and Figure 19 It is along Figure 16 Cross-sectional view of line II' in the diagram.

[0258] Reference Figures 15 to 19 In the second camera actuator according to an embodiment, the first coil holder 1222a can be formed by connecting multiple components. In an embodiment, the first coil holder 1222a may include a first lens holder LAH1, a guide unit GP, and a connecting member BM.

[0259] The first lens holder LAH1 may include a first lens aperture for receiving a lens. Therefore, as described above, the second lens group may be located within the first lens aperture of the first lens holder LAH1. In this way, the first lens holder LAH1 can be coupled to the second lens group.

[0260] The guide unit GP can be positioned spaced apart from the first lens holder LAH1 on one side. The guide unit GP can be horizontally spaced apart from the first lens holder LAH1. For example, the guide unit GP can be positioned such that at least a portion of it has a space or region horizontally spaced apart from the first lens holder LAH1. In the first coil frame 1222a, the guide unit GP can be referred to as the "first guide unit". Furthermore, the description and structure of the second coil frame 1222b can be the same as that of the first coil frame 1222a. Alternatively, the description and structure of the second coil frame 1222b can differ from that of the first coil frame 1222a. For example, like the first coil frame 1222a, the second coil frame 1222b can include a second lens holder LAH2 and the guide unit GP. In the second coil frame 1222b, the guide unit GP can be referred to as the "second guide unit". Furthermore, in the second coil holder 1222b, the second lens holder LAH2 and the second guide unit GP can be integrally formed. That is, the second guide unit can extend from the second lens holder along the first direction and can be directly connected to the second lens holder. Furthermore, the second guide unit can be in direct contact with the second lens holder. Additionally, in at least one of the first coil holder and the second coil holder, a connecting member can be used to connect the guide unit to the lens holder.

[0261] The bonding member BM can be located between the first lens holder LAH1 and the guide unit GP. The bonding member BM can include resin, etc. For example, the bonding member BM can include epoxy resin. Furthermore, the bonding member BM can be cured by irradiation with light (e.g., ultraviolet light). In this way, the first lens holder LAH1 and the guide member GP can be bonded to each other using the bonding member BM.

[0262] By means of the connecting member BM, the tilting of the first lens holder LAH1 relative to the optical axis direction can be performed during assembly. In other words, optical axis alignment of the first lens assembly can be achieved. Therefore, the optical performance of the second camera actuator according to the embodiment can be improved. Furthermore, in optical axis alignment, the movement, position alignment, or tilting of the guiding unit GP relative to the first lens holder LAH1 can be performed in various directions. For example, the guiding unit can move, position align, or tilt relative to the first lens holder LAH1 in at least one of the first direction, the second direction, and the third direction. In other words, optical axis alignment (active alignment) can be performed in all directions. As described above, the first coil frame or the first lens assembly 1222a can have a combined structure of separate first lens holder LAH1, guiding member GP, and connecting member BM. The above-described combined structure can also be applied to the second lens assembly. In addition, in other words, the central axis of each lens holder in the lens holders (first lens holder and second lens holder) can be adjusted relative to the guiding portions (first guiding portion and second guiding portion). That is, the optical axis of the lens holder can be adjusted or adjusted relative to the guiding unit.

[0263] However, the first lens assembly can have a greater range of motion along the optical axis than the second lens assembly. Therefore, more effective improvements in optical performance can be provided by aligning the optical axis of the first lens assembly.

[0264] Specifically, the first lens holder LAH1 may include a holder outer surface HOS that contacts the connecting member BM. The outer surface HOS of the first lens holder LAH1 may be positioned facing the inner surface GIS of the guiding unit GP.

[0265] The outer surface HOS of the retainer may include a first groove HOSh and a first protrusion HOSp. The outer surface HOS of the retainer may be a surface facing the guide unit GP and includes the first groove HOSh disposed on the inner side. The outer surface (HOS) of the retainer may correspond to or be referred to as the "first surface". In addition, the inner surface GIS of the guide unit GP may correspond to or be referred to as the "second surface".

[0266] The outer surface HOS of the retainer and the inner surface GIS of the guide unit GP can be configured to be perpendicularly inclined to the upper or lower surface of the first lens retainer LAH1. For example, the upper or lower surface of the first lens retainer LAH1 can be located between opposing outer surfaces HOS of the retainer. Furthermore, the upper or lower surface of the first lens retainer LAH1 is a surface that contacts a clamp or the like, and the clamp can be used to insert the first lens retainer LAH1 into the main lens barrel through one of the housing holes (first hole or second hole) of the main lens barrel.

[0267] Furthermore, the first lens holder LAH1 and the guide unit GP may have inclined facing surfaces. For example, the outer surface HOS of the first lens holder LAH1 and the inner surface GIS of the guide unit GP may be positioned to be inclined toward each other. The first protrusion HOSp may be located inside the first groove HOSh. For example, the first protrusion HOSp may be formed in the first groove HOSh.

[0268] The connecting member BM can be located in the first groove HOSh and the first protrusion HOSp. That is, the connecting member BM can contact the outer surface HOS of the retainer. In addition, the connecting member BM can be located in the first groove HOSh and contact the first protrusion HOSp.

[0269] In one embodiment, the connecting member BM can be disposed between the first protrusion and the second protrusion. Alternatively, the connecting member BM can be disposed between the first groove and the second groove.

[0270] This configuration increases the bonding area between the bonding member BM and the outer surface HOS of the first retainer. In other words, the bonding force between the first lens retainer LAH1 and the guiding unit GP can be improved by using the bonding member BM.

[0271] In addition, the guide unit GP may include an inner surface GIS that contacts the connecting member and an outer surface GOS that is opposite to the inner surface GIS.

[0272] The inner surface GIS of the guide unit GP can be positioned closer to the optical axis than the outer surface GOS. Alternatively, the inner surface GIS of the guide unit GP can be positioned closer to the second lens group than the outer surface GOS. Alternatively, the inner surface GIS of the guide unit GP can be positioned more inward relative to the optical axis than the outer surface GOS.

[0273] The guide unit GP may include a second groove GISh and a second protrusion GISp. The second groove GISh may be located in the inner surface GIS of the guide unit GP. The second protrusion GISp may be located on the inner surface GIS of the guide unit GP.

[0274] The second protrusion GISp can be located inside the second groove GISh on the inner surface GIS of the guide unit GP. For example, the second protrusion GISp can be formed in the second groove GISh.

[0275] Furthermore, the connecting member BM can be located within the second groove GISh and the second protrusion GISp. In other words, the connecting member BM can contact the inner surface GIS of the guide unit GP. Furthermore, the connecting member BM can be located within the second groove GISh. Furthermore, the connecting member BM can contact the second protrusion GISp.

[0276] This configuration increases the bonding area between the bonding member BM and the inner surface GIS of the guide unit GP. In this way, the bonding force between the first lens holder LAH1 and the guide unit GP can be improved through the bonding member BM.

[0277] Furthermore, the guidance unit GP can be divided into a first guidance region GA1 and a second guidance region GA2. Alternatively, the guidance unit GP may include a first guidance region GA1 and a second guidance region GA2. The first guidance region GA1 and the second guidance region GA2 may correspond to corresponding regions of the guidance unit GP, the length of which is bisected along the optical axis. The first guidance region GA1 may be closer to the first camera actuator than the second guidance region GA2. Furthermore, the second guidance region GA2 may be closer to the image sensor than the first guidance region GA1.

[0278] In this embodiment, the second groove GISh and the second protrusion GISp can be located in at least one of the first guide region GA1 and the second guide region GA2. For example, the second groove GISh and the second protrusion GISp can be located in the first guide region GA1. With this configuration, the movement distance of the first lens assembly in the optical axis direction can be increased. In other words, the movement distance of the first lens assembly used for zooming can be increased. Therefore, optical performance (e.g., magnification) can be improved.

[0279] Furthermore, the outer surface GOS of the guidance unit GP can face a side portion of the housing. For example, the outer surface GOS of the guidance unit GP can face a first side portion of the housing. Alternatively, the outer surface GOS of the guidance unit GP can be positioned closer to the first side portion of the housing than to a second side portion of the housing.

[0280] Furthermore, a recess in which the spherical member is seated can be formed in the outer surface GOS or the third surface GOS of the guidance unit GP. For example, a first recess and a second recess in which the spherical member is seated can be formed in the outer surface GOS or the third surface GOS of the guidance unit GP. The third surface may face the side portion of the housing.

[0281] Furthermore, the first groove HOSh and the second groove GISh can overlap in a direction perpendicular to the optical axis. Alternatively, the first groove HOSh and the second groove GISh can overlap in a direction from the first surface toward the second surface. This can also be applied to the opposite direction. For example, the first groove HOSh and the second groove GISh can overlap in the horizontal direction or in the second direction. With this configuration, in the region where the connecting member BM, the first lens holder LAH1, and the guide unit GP overlap in the horizontal direction, the bonding force of the connecting member BM for the first lens holder LAH1 and the guide unit GP can be formed to be the same. That is, the first lens holder LAH1 and the guide member GP can be connected to each other through the connecting member BM, and the bonding force between the first lens holder LAH1 and the guide unit GP can also be formed in a balanced manner. In this way, the reliability of the first lens assembly can be improved.

[0282] In another example, the first groove HOSh may also have additional grooves formed therein. That is, the first groove HOSh may also include additional grooves. This configuration can also improve the bonding force between the first lens holder and the guiding unit.

[0283] In the modified example, the first groove HOSh and the second groove GISh may only partially overlap in the direction perpendicular to the optical axis. For example, the first groove HOSh and the second groove GISh may at least partially not overlap in the direction perpendicular to the optical axis. Using this configuration, the bonding area of ​​the bonding member BM can be increased, thereby further improving the bonding force between the first lens holder LAH1 and the guiding unit GP. Therefore, the reliability of the first lens assembly can also be improved.

[0284] Furthermore, the first protrusion HOSp and the second protrusion GISp can overlap in a direction perpendicular to the optical axis. The first protrusion HOSp and the second protrusion GISp can also overlap in a direction from the first surface toward the second surface. This can also be applied to the opposite direction. For example, the first protrusion HOSp and the second protrusion GISp can overlap in the horizontal direction or in the second direction. Using this configuration, in the region where the connecting member BM, the first lens holder LAH1, and the guide unit GP overlap in the horizontal direction, the bonding force of the connecting member BM for the first lens holder LAH1 and the guide unit GP can be formed to be the same. That is, the first lens holder LAH1 and the guide unit GP can be connected to each other through the connecting member BM, and the bonding force between the first lens holder LAH1 and the guide unit GP can also be formed in a balanced manner. In this way, the reliability of the first lens assembly can be improved.

[0285] In the modified example, the first protrusion HOSp and the second protrusion GISp may only partially overlap in a direction perpendicular to the optical axis. For example, the first protrusion HOSp and the second protrusion GISp may at least partially not overlap in a direction perpendicular to the optical axis.

[0286] Alternatively, the first protrusion HOSp and the second protrusion GISp can be alternately arranged. For example, the first protrusion HOSp and the second protrusion GISp can be alternately located in the optical axis direction. For example, the first protrusion HOSp and the second protrusion GISp can partially overlap in the optical axis direction.

[0287] This configuration increases the bonding area of ​​the bonding member BM, thereby improving the bonding force between the first lens holder LAH1 and the guiding unit GP. Therefore, it also improves the reliability of the first lens assembly.

[0288] Figure 20 This is a top view of the second camera actuator according to an embodiment. Figure 21 This is a view showing the inside of the housing in the second camera actuator according to an embodiment. Figure 22 This is a bottom view of the second camera actuator according to the embodiment, and Figure 23 This is a view showing the inside of the housing in the second camera actuator according to an embodiment.

[0289] Reference Figures 20 to 23 In the second camera actuator according to the embodiment, the housing 1232 may include a first hole 1232h1 and a second hole 1232h2.

[0290] Furthermore, at least one of the first aperture 1232h1 and the second aperture 1232h2 can overlap with the first lens holder LAH1 and the connecting member BM in a direction perpendicular to the optical axis. In other words, at least one of the first aperture 1232h1 and the second aperture 1232h2 can overlap with the first lens holder LAH1 and the connecting member BM in a first direction (X-axis direction) or a vertical direction.

[0291] For example, the first lens holder LAH1 may be exposed through at least one of the first hole 1232h1 and the second hole 1232h2. Furthermore, the bonding member BM may be exposed through at least one of the first hole 1232h1 and the second hole 1232h2. Alternatively, the lens holder and the bonding member may overlap or superimpose with respect to the first and second holes in a first direction.

[0292] In this embodiment, the first hole 1232h1 and the second hole 1232h2 can overlap with the first lens holder LAH1 and the connecting member BM in a first direction (X-axis direction) or a vertical direction. In other words, the first lens holder LAH1 and the connecting member BM can be exposed through the first hole 1232h1 and the second hole 1232h2. At this time, at least a portion of the connecting member BM can be exposed through the first hole 1232h1 and the second hole 1232h2.

[0293] With this configuration, either the first coil holder 1222a or the second coil holder 1222b can be easily introduced into the housing 1232 through at least one of the first hole 1232h1 and the second hole 1232h2. That is, assembly or connection between the housing 1232 and the first coil holder 1222a (or the second coil holder 1222b) can be easily achieved.

[0294] Furthermore, when active alignment is performed on the first coil frame 1222a, the bonding member BM can be easily illuminated with light. That is, the bonding member BM can be more easily illuminated with light through the first hole 1232h1 and the second hole 1232h2.

[0295] Therefore, the lengths of the first hole 1232h1 and the second hole 1232h2 in the horizontal direction or the second direction (Y-axis direction) can be greater than the length of the first lens holder LAH1 (or the first lens holder and the first connecting member) in the second direction (Y-axis direction).

[0296] In addition, the lengths of the first hole 1232h1 and the second hole 1232h2 in the optical axis direction or the third direction (Z-axis direction) can be greater than the lengths of the first lens holder LAH1 (or the first lens holder and the first connecting member) in the optical axis direction or the third direction (Z-axis direction).

[0297] Therefore, after performing optical axis alignment or active alignment of the fixed components, optical axis alignment or active alignment of the first coil frame 1222a can also be performed. This, as described below, can further improve the optical performance of the second camera actuator. For example, the optical axes of the third lens group in the second coil frame 1222b and the second lens group in the first coil frame 1222a can coincide with each other.

[0298] In another example, at least one of the first coil holder 1222a and the second coil holder 1222b may have a connecting member. Therefore, optical axis alignment of the first coil holder 1222a (or the second lens group) and the second coil holder 1222b (or the third lens group) can be achieved.

[0299] In the modified example, either the first coil holder 1222a or the second coil holder 1222b may have a connecting member. Therefore, optical axis alignment can be achieved between the first coil holder 1222a (or the second lens group) and the second coil holder 1222b (or the third lens group). For example, optical axis alignment can be performed only on the first coil holder 1222a (or the second lens group). Alternatively, optical axis alignment can be performed only on the second coil holder 1222b (or the third lens group).

[0300] Furthermore, in the active alignment (AA) of the fixing components, the thickness of the bonding material (e.g., epoxy resin) used in the bonding between the fixing components and the housing can also be different.

[0301] As described above, the first coil holder can be composed of a first lens holder and a guide unit (first guide unit). The second coil holder can be composed of a second lens holder and a guide unit (second guide unit).

[0302] Furthermore, the outer surface (first surface) of the first lens holder can face the inner surface (second surface) of the first guide unit. The first surface and the second surface can contact each other through a connecting member.

[0303] In one embodiment, the second surface can be positioned at an angle relative to the optical axis or the direction of the optical axis. Conversely, the first surface can be parallel to the optical axis or the direction of the optical axis. This configuration can also improve optical performance.

[0304] Furthermore, the bonding member may be composed of one or more bonding members between the first surface and the second surface. In an embodiment, the bonding member may be composed of a first bonding member and a second bonding member spaced apart in the optical axis direction between the first surface and the second surface. Additionally, the bonding member may have a third bonding member and a fourth bonding member disposed between the first surface and the second surface in a direction perpendicular to the optical axis direction. Furthermore, the third bonding member and the fourth bonding member may have different thicknesses.

[0305] At this time, the first and second connecting members can have different thicknesses due to the positional adjustment between the first and second surfaces according to the aforementioned optical axis alignment. Furthermore, the connecting members can be formed as a single piece, but each region can have a different thickness. For example, the thickness of each region of the connecting member can be different. In an embodiment, the guiding unit GP can have a portion in which the guiding unit GP and at least one of the first aperture 1232h1 and the second aperture 1232h2 partially overlap in a direction perpendicular to the optical axis (hereinafter, interchangeably referred to as the "first portion"). For example, the guiding unit GP can have a portion (the first portion) in which the guiding unit GP and at least one of the first aperture 1232h1 and the second aperture 1232h2 partially overlap in a vertical direction or a first direction (X-axis direction). Using this configuration, light irradiation of the connecting member BM can be performed on the entire connecting member BM. Therefore, the reliability between the guiding unit GP and the first lens holder LAH1 can also be improved by the connecting member BM.

[0306] Furthermore, in the first guiding unit, the second part may not overlap with the first hole and the second hole in a direction perpendicular to the optical axis (the first direction). That is, in the first guiding unit, the second part and the housing may overlap in a direction from the first hole toward the second hole. For example, the second part and the housing may overlap in the first direction.

[0307] Figure 24 This is a view used to illustrate the combination of the lens holder and the guide portion in the first lens assembly of the second camera actuator according to an embodiment, and Figure 25 It is a graph showing the spatial frequency response (SFR) in wide-angle and telephoto states after active alignment based on the movement of the fixed component and the first lens assembly.

[0308] Reference Figure 24 As described above, a first coil holder 1222a, with a connecting member BM attached to (or applied to) at least one of the first hole 1232h1 and the second hole 1232h2, can enter or be introduced into the housing 1232. Furthermore, a second coil holder or a second lens assembly can move (sweep) along the optical axis. That is, the throughfocus can be measured. Additionally, peak values ​​can be detected in the spatial frequency response (SFR). Here, the peak values ​​of the SFR can include peak values ​​in the tangential T direction and the sagittal S direction. Furthermore, the tangential T can correspond to the vertical V, and the sagittal S can correspond to the horizontal H.

[0309] Furthermore, the value corresponding to the peak value of the SFR can be correlated with the position of the first lens assembly in the Z-axis direction (optical axis direction). In the SFR, 0 on the X-axis can be correlated with the initial position of the first lens assembly. That is, in the SFR, the X-axis corresponds to the position of the first lens assembly in the Z-axis direction.

[0310] In this implementation, the SFR curve is a curve representing the target's region of interest (ROI). While at least one ROI may exist, the following description will be based on four ROIs (excluding the center). For example, the ROI may be located relative to the target's center at the top left (LT), top right (RT), bottom left (LB), and bottom right (RB). The SFR can be obtained from the top left (LT), top right (RT), bottom left (LB), and bottom right (RB), respectively.

[0311] By obtaining values ​​from both the region of interest and the center of the target, an angle for correction can be derived. This derived angle can then be used to perform angular correction on the first lens assembly (or the first coil frame). That is, tilt correction or eccentricity correction can be performed on the first coil frame. Performing this correction or optical axis alignment can improve optical performance, such as… Figure 25 As shown in the figure.

[0312] Reference Figure 25 Case 1 is an SFR performed before active alignment (AA) correction; Case 2 is an SFR in which AA (movement (sweeping) of the first or second coil holder) is performed on the fixed assembly; and Case 3 is an SFR in which AA is additionally performed on the first coil holder in Case 2. Figure 25 In the diagram, the y-axis represents the SFR value, and the x-axis represents the focus shift distance (e.g., in mm).

[0313] Furthermore, in each case, the tolerances between the multiple lenses in the lens group of each of the fixed assembly, the first lens assembly, and the second lens assembly are: tilt angle ±0.1 degrees, and eccentricity ±5 μm. Additionally, the tilt angle between groups (between the fixed assembly, the first lens assembly, and the second lens assembly) is ±0.2 degrees, and the eccentricity is ±20 μm.

[0314] For each of the cases, the corresponding SFR before AA correction (Case 1) refers to the SFR in wide-angle and telephoto states before the fixed assembly and the first coil frame are corrected at a predetermined angle.

[0315] Furthermore, after the AA correction of the fixed component, the corresponding SFR (Case 2) refers to the SFR in each state (wide-angle, telephoto) after tilting or correcting the fixed component at a predetermined correction angle.

[0316] In this embodiment, wide-angle can correspond to the state where the first lens assembly (first coil mount) is moved to its maximum extent along the optical axis towards the second lens assembly or image sensor. Alternatively, wide-angle refers to the position of the first lens assembly in a near-focal length state or at minimum magnification. Telephoto can correspond to the state where the first lens assembly is moved to its maximum extent along the optical axis towards the fixed assembly or first camera actuator. Alternatively, telephoto refers to the position of the first lens assembly in a telephoto length state or at maximum magnification.

[0317] In addition, the corresponding SFR after the other AA correction (Case 3) refers to the SFR in each state (wide-angle, telephoto) after the first coil frame is corrected at a predetermined angle when the second lens assembly (second coil frame) moves (sweeps) after the AA of the fixed assembly.

[0318] exist Figure 25 In the SFR curve graph, the y-axis represents the percentage of SFR value. For example, 1 means 100%. Additionally, the x-axis represents the Z-value or length along the optical axis. Furthermore, lines of different colors (dashed or solid lines) represent the SFR from the center of RT, RB, LT, LB, and ROI in the tangential (or vertical) direction and the sagittal (or horizontal) direction.

[0319] In this way, compared with cases 1 and 2, case 3 can reduce the maximum error of the peak value of SFR in at least one of the telephoto and wide-angle states.

[0320] For example, as in case 3, after angular correction of the fixed assembly and the first coil frame based on the movement (sweeping) of the second coil frame, the maximum error of the peak value of the spatial frequency response in both telephoto and wide-angle states can be reduced. That is, the error of the Z value between the peak values ​​of the SFR in the tangential (or vertical) direction and the sagittal (or horizontal) direction from the center of RT, RB, LT, LB, and ROI can be reduced.

[0321] In this way, when comparing Case 3 with Cases 1 and 2, the error in the Z-value between the peak values ​​of SFR is large before the calibration of the fixing component and the first coil frame (before AA calibration), but the error in the Z-value between the peak values ​​of SFR can be reduced after the calibration of the fixing component (after AA calibration). Furthermore, the error in the Z-value between the peak values ​​of SFR is large before the calibration of the fixing component and the first coil frame (before AA calibration), but the error in the Z-value between the peak values ​​of SFR can be reduced after the calibration of the fixing component and the first coil frame. Additionally, the error in the Z-value between the peak values ​​of SFR is large after the calibration of the fixing component, but the error in the Z-value between the peak values ​​of SFR can be reduced after the calibration of the fixing component and the first coil frame.

[0322] In other words, optical performance can be improved by additionally performing AA on the first coil frame by AA on the fixed component.

[0323] By performing angle correction (AA correction) on the aforementioned fixing components and the first coil holder, the resolution performance degradation caused by sensitivity at high magnification can be improved. It is difficult to improve module resolution using module AA (optical axis alignment between the first and second camera actuators), and it is possible to improve the balance solely through field of view. However, as in the embodiment, improved lens performance and yield can be achieved by correcting the angles of the fixing components and the first coil holder (see Table 1). That is, lens yield can be improved in every state (wide-angle, telephoto) according to AA correction. The values ​​in Table 1 are results from Monte Carlo simulations.

[0324] [Table 1]

[0325]

[0326]

[0327] Figure 26 This is a top view of a second camera actuator according to another embodiment, and Figure 27 This is a top view of a second camera actuator according to yet another embodiment. (Refer to...) Figure 26 According to another embodiment, the second camera actuator may include a moving component, a housing, a drive unit, a base unit, a substrate unit, a stop member, etc. Furthermore, the second camera actuator may also include a protective cover (not shown), an elastic unit (not shown), and a connecting member (not shown). Additionally, except as described below, the above description of the first lens assembly (or first coil holder) in the second camera actuator is equally applicable.

[0328] The first lens holder LAH1 of the first coil holder 1222a can be tilted at a predetermined angle relative to the optical axis in a first direction or a second direction. For example, the first lens holder LAH1 of the first coil holder 1222a can have a first angle θa relative to the optical axis in the second direction. Therefore, the separation distance between the outer surface HOS of the first holder of the first lens holder LAH1 in the first coil holder 1222a and the guiding unit GP can vary in the direction of the optical axis.

[0329] For example, the separation distance between the outer surface HOS of the first lens holder LAH1 and the guiding unit GP can be increased in the optical axis direction. Therefore, the thickness of the bonding member BM can also be increased in the optical axis direction in the area where the bonding member BM contacts the first lens holder or the first groove.

[0330] Reference Figure 27According to another embodiment, the second camera actuator may include a moving component, a housing, a drive unit, a base unit, a substrate unit, a stop member, etc. Furthermore, the second camera actuator may also include a protective cover (not shown), an elastic unit (not shown), and a connecting member (not shown).

[0331] In addition, except for the following, the description of the first lens assembly (or first coil holder) in the second camera actuator described above can also be applied.

[0332] The first lens holder LAH1 of the first coil holder 1222a can be tilted at a predetermined angle relative to the optical axis in a first direction or a second direction. For example, the first lens holder LAH1 of the first coil holder 1222a can have a second angle θb relative to the optical axis in the second direction. Therefore, the separation distance between the outer surface HOS of the first holder of the first lens holder LAH1 in the first coil holder 1222a and the guiding unit GP can vary in the direction of the optical axis.

[0333] For example, the separation distance between the outer surface HOS of the first lens holder LAH1 and the guiding unit GP can be reduced in the optical axis direction. Therefore, the thickness of the bonding member BM can also be reduced in the optical axis direction in the region that contacts the first lens holder or the first groove.

[0334] Figure 28 This is a schematic diagram showing a circuit board according to an embodiment.

[0335] Reference Figure 28 As described above, the circuit board 1300 according to the embodiment may include a first circuit board unit 1310 and a second circuit board unit 1320. The first circuit board unit 1310 may be located below and connected to the base. Furthermore, an image sensor IS may be disposed on the first circuit board unit 1310. Additionally, the first circuit board unit 1310 and the image sensor IS may be electrically connected. That is, the base may be located at the rear end of the second camera actuator, and the image sensor and the circuit board (first circuit board unit) may be located at the rear end of the base. The base may include a filter (e.g., an infrared filter, etc.). The circuit board 1300 may include the aforementioned image sensor and sensor base.

[0336] Additionally, the second circuit board unit 1320 may be located on a side portion of the base. Specifically, the second circuit board unit 1320 may be located on a first side portion of the base. Therefore, the second circuit board unit 1320 may be positioned adjacent to the first coil, which is positioned adjacent to the first side portion, to facilitate electrical connection. Alternatively, the second circuit board unit 1320 may be located on a second side portion. In this way, multiple second circuit board units 1320 can be provided. However, the invention is not limited thereto, and the second circuit board unit 1320 may be provided only on one of the first and second side portions.

[0337] Furthermore, the circuit board 1300 may additionally include a fixing plate (not shown) located on a side surface of the circuit board 1300. Thus, even when the circuit board 1300 is made of a flexible material, the circuit board 1300 can be coupled to the base while maintaining rigidity due to the fixing plate.

[0338] The second circuit board unit 1320 of circuit board 1300 may be located on the side portion of drive unit 1250. Circuit board 1300 may be electrically connected to the first drive unit and drive unit. For example, SMT may be used for electrical connection. However, the invention is not limited to such a method.

[0339] The circuit board 1300 may include a circuit board with a wiring pattern capable of electrical connection, such as a rigid printed circuit board (rigid PCB), a flexible printed circuit board (flexible PCB), and a rigid-flexible printed circuit board (rigid-flexible PCB). However, the present invention is not limited to these types.

[0340] Additionally, circuit board 1300 can be electrically connected to another camera module in the terminal or the terminal's processor. In this way, the aforementioned camera actuator and the camera module including the camera actuator can send and receive various signals within the terminal.

[0341] Figure 29 This is a perspective view of a mobile terminal that uses a camera module according to an implementation method.

[0342] like Figure 29 As shown, the mobile terminal 1500 in the embodiment may include a camera module 1000, a flash module 1530 and an autofocus device 1510 disposed on the rear surface of the mobile terminal 1500.

[0343] The camera module 1000 may include image capture and autofocus functions. For example, the camera module 1000 may include an autofocus function that uses an image.

[0344] The camera module 1000 processes image frames of still or moving images acquired by the image sensor in capture mode or video call mode.

[0345] The processed image frames can be displayed on a predetermined display unit and stored in memory. A camera (not shown) can also be mounted on the front of the mobile terminal body.

[0346] For example, camera module 1000 may include a first camera module 1000A and a second camera module 1000B, and OIS together with AF function or zoom function may be implemented by the first camera module 1000A.

[0347] The flash module 1530 may include a light-emitting element therein. The flash module 1530 can be operated via the camera of a mobile terminal or via user control.

[0348] The autofocus device 1510 may include one of the packages in the package of a surface-emitting laser device that serves as a light-emitting unit.

[0349] The autofocus device 1510 may include an autofocus function using a laser. The autofocus device 1510 can be used primarily in conditions where it is difficult to use the autofocus function using the image of the camera module 1000, such as at close range of 10m or less or in dark environments.

[0350] The autofocus device 1510 may include a light emitting unit and a light receiving unit. The light emitting unit includes a vertical cavity surface emitting laser (VCSEL) semiconductor device, and the light receiving unit converts light energy into electrical energy, such as a photodiode.

[0351] Figure 30 It is a perspective view of a vehicle equipped with a camera module according to the implementation method.

[0352] For example, Figure 30 It is an external view of a vehicle including a vehicle driving assistance device with a camera module 1000 according to an embodiment.

[0353] Reference Figure 30 The vehicle 700 in the embodiment may include wheels 13FL and 13FR that rotate via a power source, as well as predetermined sensors. The sensors may be a camera sensor 2000, but are not limited thereto.

[0354] The camera sensor 2000 may be a camera sensor with a camera module 1000 applied according to the embodiment. The vehicle 700 in the embodiment can obtain image information by capturing images of the front or surroundings through the camera sensor 2000, and can use the image information to determine if a lane is not recognized and create a virtual lane when a lane is not recognized.

[0355] For example, camera sensor 2000 can capture the front of vehicle 700 to obtain a frontal image, and processor (not shown) can analyze the objects included in the frontal image to obtain image information.

[0356] For example, when objects such as lanes, adjacent vehicles, traffic obstacles, and median strips, curbs, and roadside trees corresponding to indirect road markings are captured in an image by the camera sensor 2000, the processor can detect these objects and include information about them in the image information. At this time, the processor can obtain distance information about the objects detected by the camera sensor 2000 to further supplement the image information.

[0357] Image information can be information about objects captured in the image. The camera sensor 2000 may include an image sensor and an image processing module.

[0358] The camera sensor 2000 can process still or moving images obtained by an image sensor (e.g., CMOS or CCD).

[0359] The image processing module can process still or moving images obtained through the image sensor, extract necessary information, and send the extracted information to the processor.

[0360] At this point, although the camera sensor 2000 may include a stereo camera to improve the measurement accuracy of the object and ensure more information such as the distance between the vehicle 700 and the object, the present invention is not limited thereto.

[0361] Although embodiments have been primarily described above, these embodiments are merely examples and are not intended to limit the invention. It will be apparent to those skilled in the art that various modifications and applications not illustrated herein can be made without departing from the essential characteristics of the invention. For example, each of the constituent elements specifically shown in the embodiments can be modified and implemented. Furthermore, it should be understood that differences related to modifications and applications are included within the scope of the invention as defined by the appended claims.

Claims

1. A camera actuator, comprising: case; A first coil frame is disposed in the housing; as well as A driving unit, configured to move the first coil frame along the optical axis, The first coil frame includes: A first lens holder, the first lens holder being configured to accommodate a lens; A first guiding unit, the first guiding unit being disposed on a side portion of the housing; and A connecting member is disposed between the first lens holder and the first guiding unit.

2. The camera actuator according to claim 1, wherein, The first lens holder includes a first surface that contacts the coupling member, and The first guiding unit includes a second surface that contacts the connecting member.

3. The camera actuator according to claim 2, wherein, The first surface includes a first groove, and The second surface of the first guiding unit includes a second groove.

4. The camera actuator according to claim 3, wherein, The first groove and the second groove overlap in the direction from the first surface toward the second surface.

5. The camera actuator according to claim 3, wherein, The first surface includes a first protrusion disposed in the first groove, and The second surface includes a second protrusion disposed in the second groove.

6. The camera actuator according to claim 5, wherein, The first protrusion and the second protrusion overlap in the direction from the first surface toward the second surface.

7. The camera actuator according to claim 2, wherein, The first guiding unit includes a third surface configured opposite to the second surface; and The third surface of the first guiding unit faces the side portion of the housing and includes a recess in which a spherical member is disposed.

8. The camera actuator according to claim 2, wherein, The side portion of the housing includes a first side portion and a second side portion, the first side portion having an inner surface of the first guide unit facing the first coil frame, and the second side portion being opposite to the first side portion.

9. The camera actuator according to claim 8, wherein, The housing includes an upper surface and a lower surface disposed between the first side portion and the second side portion. The upper surface includes a first hole, and The lower surface includes a second hole.

10. The camera actuator according to claim 9, wherein, The connecting member is exposed through at least one of the first hole and the second hole.

Images