KR20220160214A - Camera actuator and camera device comprising the same - Google Patents

Abstract

According to an embodiment of the present invention, disclosed is a camera actuator including: a base; a first lens assembly and a second lens assembly sequentially arranged in the optical axis direction within the base; and a driving unit moving the first lens assembly or the second lens assembly. The driving unit further includes a first lens driving unit including a first rod contacting the first lens assembly and a first piezoelectric unit connected to the first rod. The first lens assembly includes a first elastic part connected to the first rod. The first elastic part includes: a first region in contact with the first lens assembly; a first curvature region extending from the first region and having a curvature; and a second region extending from the first curvature region and facing the first region. The present invention supplies even pressure applied to a rod.

Description

Camera actuator and camera device including the same {CAMERA ACTUATOR AND CAMERA DEVICE COMPRISING THE SAME}

The present invention relates to a camera actuator and a camera device including the same.

A camera is a device that takes a picture or video of a subject and is mounted on a portable device, a drone, or a vehicle. The camera device has an Image Stabilization (IS) function that corrects or prevents image shake caused by user movement in order to improve image quality, and an image stabilization (IS) function that automatically adjusts the distance between the image sensor and the lens to align the focal length of the lens. It may have an auto focusing (AF) function and a zooming function for photographing by increasing or decreasing the magnification of a distant subject through a zoom lens.

On the other hand, the resolution of the image sensor increases as it goes to higher pixels, so the size of the pixels decreases. As the pixels become smaller, the amount of light received during the same time decreases. Therefore, in a high-pixel camera, image shaking caused by hand shake caused by a slower shutter speed in a dark environment may be more severe. As a representative image stabilization (IS) technology, there is an optical image stabilizer (OIS) technology, which is a technology for correcting motion by changing a path of light.

According to general OIS technology, camera movement may be detected through a gyrosensor, etc., and based on the detected movement, a lens may be tilted or moved, or a camera module including a lens and an image sensor may be tilted or moved. . When a lens or a camera module including a lens and an image sensor is tilted or moved for OIS, a space for tilting or moved around the lens or camera module needs to be additionally secured.

Meanwhile, an actuator for OIS may be disposed around the lens. At this time, the actuator for OIS may include two axes perpendicular to the optical axis Z, that is, an actuator responsible for X-axis tilting and an actuator responsible for Y-axis tilting.

However, there are significant restrictions on space for arranging actuators for OIS according to the needs of ultra-slim and subminiature camera devices, and the camera module itself including a lens or a lens and an image sensor has enough space to tilt or move for OIS It can be difficult to guarantee. In addition, it is desirable for a high-pixel camera to increase the size of the lens in order to increase the amount of light received, but there may be a limit to increasing the size of the lens due to the space occupied by the actuator for OIS.

In addition, when a zooming function, an AF function, and an OIS function are all included in a camera device, there is a problem of causing magnetic field interference because the magnet for OIS and the magnet for AF or zoom are disposed close to each other.

In addition, there are spatial restrictions or limitations for lens movement, and problems such as increased thickness in the piezo actuator and different pressure applied to the rod exist.

A technical problem to be solved by the present invention is to provide a camera actuator that uniformly provides pressure applied to a rod.

In addition, an embodiment of the present invention can provide a camera actuator in which a deviation generated during coupling between a piezoelectric unit and a lens assembly is minimized and a process is improved.

In addition, an embodiment of the present invention may provide a camera actuator having a reduced thickness by adjusting the position and structure of the substrate, the hall sensor, and the positioning magnet.

In addition, it is possible to provide a camera actuator applicable to ultra-slim, subminiature, and high-resolution cameras.

The problem to be solved in the embodiment is not limited thereto, and it will be said that the solution to the problem described below or the purpose or effect that can be grasped from the embodiment is also included.

A camera actuator according to an embodiment of the present invention includes a base; a first lens assembly and a second lens assembly sequentially arranged in the optical axis direction within the base; and a driving unit for moving the first lens assembly or the second lens assembly, wherein the driving unit includes a first rod in contact with the first lens assembly and a first piezoelectric unit connected to the first rod. 1 lens driving unit; and a first elastic part connected to the first rod, wherein the first elastic part includes a first region in contact with the first lens assembly; and a first curvature area extending from the first area and having a curvature, and a second area extending from the first curvature area and facing the first area.

The first rod may be disposed between the first region and the second region.

The first lens assembly may include a first lens groove.

The first area may include a first elastic groove, and the first elastic groove may be located in the first lens groove.

The second area may include a second elastic groove, and the second elastic groove may be disposed to face the first elastic groove.

A length of the first curvature region in the optical axis direction may be smaller than a length of the first region or the second region in the optical axis direction.

The first lens assembly may include a first side surface in contact with the first elastic part, and the first side surface may include a first coupling protrusion protruding outward.

The first coupling protrusion may include a base region overlapping the first curvature region in the optical axis direction; and an extension area extending to the second area.

The extension area may at least partially overlap the second area in the optical axis direction.

A plurality of first coupling protrusions may be spaced apart from each other along the optical axis direction.

The first curvature region may be disposed between spaced apart first coupling protrusions.

The first elastic part may include a third area extending from the second area to the first lens assembly.

The driving unit may include a second lens driving unit including a second rod contacting the second lens assembly and a second piezoelectric unit connected to the second rod.

The second lens assembly may further include a second elastic part connected to the second rod.

The second elastic part may include a fourth region in contact with the second lens assembly; and a second curvature area extending from the fourth area and having a curvature, and a fifth area extending from the second curvature area and facing the fourth area.

The second rod may be disposed between the fourth region and the fifth region.

The second lens assembly may include a second lens groove, the fourth area may include a third elastic groove, and the third elastic groove may be located in the second lens groove.

The fifth region may include a fourth elastic groove, and the fourth elastic groove may be disposed to face the third elastic groove.

A length of the second curvature region in the optical axis direction may be smaller than a length of the fourth region or the fifth region in the optical axis direction.

The second lens assembly may include a second side surface contacting the second elastic part, and the second side surface may include a second coupling protrusion protruding outward.

A length of the first rod in the optical axis direction may be the same as or different from a length of the second rod in the optical axis direction.

The first lens assembly includes a first magnet groove; and a first positioning magnet disposed in the first magnet groove, wherein the first magnet groove or the first positioning magnet may be inclined at less than 90 degrees with respect to a horizontal direction.

A base surrounding the first lens assembly and the second lens assembly may be included, and a side surface of the base may include a base groove having a bottom surface inclined with respect to a horizontal direction.

A second substrate part, at least a part of which is seated in the base groove and connected to the driving part, may be included.

A guide unit penetrating any one of the first lens assembly and the second lens assembly, further comprising: a first guide pin penetrating the first lens assembly; and a second guide pin penetrating the second lens assembly.

The first lens assembly may include a first pin holder enclosing at least a portion of the second guide pin, and the second lens assembly may include a second pin holder enclosing at least a portion of the first guide pin.

a first lens group disposed in the first lens assembly; a second lens group disposed within the second lens assembly; a third lens assembly disposed in front of the first lens assembly and accommodating a third lens group; and a fourth lens group disposed in the base at the rear end of the second lens group, wherein the first lens group and the fourth lens group are relatively fixed with respect to the second lens group and the third lens group. can

According to an embodiment of the present invention, it is possible to implement a camera actuator that uniformly provides pressure applied to a rod.

In addition, embodiments of the present invention can implement a camera actuator in which a deviation generated when coupling between a piezoelectric unit and a lens assembly is minimized and a process is improved.

In addition, an embodiment of the present invention may implement a camera actuator having a reduced thickness by adjusting positions and structures of a substrate, a hall sensor, and a positioning magnet.

In addition, it is possible to provide a camera actuator applicable to ultra-slim, subminiature, and high-resolution cameras. In particular, it is possible to efficiently dispose the actuator for OIS without increasing the overall size of the camera device.

In addition, according to an embodiment of the present invention, tilting in the X-axis direction and tilting in the Y-axis direction do not cause magnetic field interference with each other, and tilting in the X-axis direction and tilting in the Y-axis direction can be implemented with a stable structure, AF It does not cause magnetic field interference even with the actuator for zooming or for zooming, so it is possible to realize a precise OIS function.

According to an embodiment of the present invention, it is possible to secure a sufficient amount of light by eliminating the size limitation of the lens, and implement OIS with low power consumption.

Various advantageous advantages and effects of the present invention are not limited to the above description, and will be more easily understood in the process of describing specific embodiments of the present invention.

1 is a perspective view of a camera module according to an embodiment,
2 is an exploded perspective view of a camera module according to an embodiment;
3 is a cross-sectional view taken along line AA' in FIG. 1;
4 is an exploded perspective view of a first camera actuator according to an embodiment;
5 is a perspective view of a first camera actuator according to an embodiment in which a shield can and a substrate are removed;
6 is a cross-sectional view taken along line BB' in FIG. 5;
7 is a cross-sectional view taken along line CC′ in FIG. 5;
8 is a perspective view of a second camera actuator according to an embodiment;
9 is an exploded perspective view of a second camera actuator according to an embodiment;
10 is a view cut along DD′ in FIG. 8 and viewed;
11 is a perspective view of a base according to an embodiment,
12 is a view viewed from K1 in FIG. 11,
13 is a rear view of the base according to the embodiment,
14 is a view explaining coupling of a first elastic part in a first lens assembly according to an embodiment;
15 is a side view of a first lens assembly according to an embodiment;
16 is a front view of a first lens assembly according to an embodiment;
17 is a top view of a first lens assembly according to an embodiment;
18 is a perspective view of a first elastic part according to an embodiment;
19 is a view showing a first elastic part and a first rod according to an embodiment;
20 is a top view of a first elastic part according to an embodiment;
21 is a perspective view of a first lens assembly, a second lens assembly, a guide pin, and a second driving unit according to an embodiment;
22 is a top view of a first lens assembly, a second lens assembly, a guide pin, and a second driving unit according to an embodiment;
23 is a bottom view of a first lens assembly, a second lens assembly, a guide pin, and a second driving unit according to an embodiment;
24 is a rear view of a first lens assembly, a second lens assembly, a guide pin, and a second driving unit according to an embodiment;
25 is a front view of a first lens assembly, a second lens assembly, a guide pin, and a second driving unit according to an embodiment;
26 is a diagram illustrating forward movement by a second driving unit of a second camera actuator according to an embodiment;
27 is a diagram for describing backward movement by a second driving unit of a second camera actuator according to an exemplary embodiment.
28 is a perspective view of a first lens assembly, a second lens assembly, a guide pin, a second driving unit, and a second substrate unit according to an embodiment;
29 is a top view of a first lens assembly, a second lens assembly, a guide pin, a second driving unit, and a second substrate unit according to an embodiment;
30 is a front view of a first lens assembly, a second lens assembly, a guide pin, a second driving unit, and a second substrate unit according to an embodiment;
31 is a rear view of a second camera actuator according to an embodiment;
32 is a perspective view of a second camera actuator according to an embodiment;
33 is a perspective view of a mobile terminal to which a camera module according to an embodiment is applied;
34 is a perspective view of a vehicle to which a camera module according to an embodiment is applied.

Since the present invention can make various changes and have various embodiments, specific embodiments are illustrated and described in the drawings. However, this specific

It is not intended to be limited to the embodiments, and it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms including ordinal numbers such as second, first, etc. may be used to describe various components, but the components are not limited by the terms. Terms are only used to distinguish one component from another. For example, a second element may be termed a first element, and similarly, a first element may be termed a second element, without departing from the scope of the present invention. The terms and/or include any combination of a plurality of related recited items or any of a plurality of related recited items.

It is understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle. It should be. On the other hand, when an element is referred to as “directly connected” or “directly connected” to another element, it should be understood that no other element exists in the middle.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Unless defined otherwise, 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 the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

Hereinafter, the embodiments will be described in detail with reference to the accompanying drawings, but the same or corresponding components regardless of reference numerals are given the same reference numerals, and overlapping descriptions thereof will be omitted.

1 is a perspective view of a camera module according to an embodiment, FIG. 2 is an exploded perspective view of a camera module according to an embodiment, and FIG. 3 is a cross-sectional view taken along line AA′ in FIG. 1 .

1 and 2 , a camera module 1000 according to an embodiment may include a cover CV, a first camera actuator 1100, a second camera actuator 1200, and a circuit board 1300. . Here, the first camera actuator 1100 may be used as a first actuator, and the second camera actuator 1200 may be used as a second actuator.

The cover CV may cover the first camera actuator 1100 and the second camera actuator 1200 . Coupling force between the first camera actuator 1100 and the second camera actuator 1200 may be improved by the cover CV.

Furthermore, the cover CV may be made of a material that blocks electromagnetic waves. Thus, the first camera actuator 1100 and the second camera actuator 1200 in the cover CV can be easily protected.

Also, the first camera actuator 1100 may be an OP1tical Image Stabilizer (OIS) actuator.

The first camera actuator 1100 may include a fixed focal length lens disposed in a predetermined lens barrel (not shown). Fixed focal length lenses may also be referred to as "single focal length lenses" or "short lenses".

The first camera actuator 1100 may change a path of light. As an example, the first camera actuator 1100 may vertically change a light path through an internal optical member (eg, a mirror or a prism). With this configuration, even if the thickness of the mobile terminal is reduced, magnification, auto focusing (AF), and OIS functions can be performed by placing a lens element larger than the thickness of the mobile terminal through a change in the light path.

The second camera actuator 1200 may be disposed behind the first camera actuator 1100 . The second camera actuator 1200 may be coupled to the first camera actuator 1100 . And mutual coupling can be made by various methods.

Also, the second camera actuator 1200 may be a zoom actuator or an auto focus (AF) actuator. For example, the second camera actuator 1200 may support one or a plurality of lenses and perform an auto focusing function or a zoom function by moving the lens according to a control signal from a predetermined control unit.

The circuit board 1300 may be disposed behind the second camera actuator 1200 . The circuit board 1300 may be electrically connected to the second camera actuator 1200 and the first camera actuator 1100 . Also, the number of circuit boards 1300 may be plural.

A camera module according to an embodiment may include a single or a plurality of camera modules. For example, the plurality of camera modules may include a first camera module and a second camera module.

And the first camera module may include a single or a plurality of actuators. For example, the first camera module may include a first camera actuator 1100 and a second camera actuator 1200 .

The second camera module may include an actuator (not shown) disposed in a predetermined housing (not shown) and capable of driving a lens unit. The actuator may be a voice coil motor, a micro actuator, a silicon actuator, and the like, and may be applied in various ways such as an electrostatic method, a thermal method, a bimorph method, an electrostatic force method, and the like, but is not limited thereto. Also, in this specification, a camera actuator may be referred to as an actuator or the like. In addition, a camera module composed of a plurality of camera modules may be mounted in various electronic devices such as mobile terminals. Furthermore, the first camera module and the second camera module may be integrally formed or separated from each other.

Referring to FIG. 3 , the camera module according to the embodiment may include a first camera actuator 1100 performing an OIS function and a second camera actuator 1200 performing a zooming function and AF function.

Light may be incident into the camera module through an opening area located on the upper surface of the first camera actuator 1100 . That is, the light is incident into the first camera actuator 1100 along the optical axis direction (eg, the X-axis direction), and the optical path passes through the optical member (mirror or prism) in the vertical direction (eg, the Z-axis direction). can be changed. The light may pass through the second camera actuator 1200 and be incident to the image sensor IS located at one end of the second camera actuator 1200 (PATH).

In this specification, the bottom surface means one side in the first direction. In addition, the first direction is the X-axis direction in the drawing and may be used interchangeably with the second axis direction. For example, the first direction may be parallel to the direction in which light is incident from the first camera actuator, and the third direction may be parallel to the reflected light, that is, the direction of the optical axis. The second direction is the Y-axis direction in the drawing and may be used interchangeably with the first-axis direction. The second direction is a direction perpendicular to the first direction. Also, the third direction is the Z-axis direction in the drawing, and may be used interchangeably with the third-axis direction. It is a direction perpendicular to both the first direction and the second direction. 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 perpendicular to the optical axis and are tilted by the second camera actuator. can A detailed description of this will be given later.

In addition, in the following description of the first camera actuator 1100 and the second camera actuator 1200, the optical axis direction is the third direction (Z-axis direction), and will be described below based on this direction.

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

In addition, the camera module according to the embodiment may implement OIS through control of the optical path through the first camera actuator, thereby minimizing the occurrence of decentralization or tilting, and obtaining the best optical characteristics. can pay

Furthermore, the second camera actuator 1200 may include an optical system and a lens driving unit. For example, the second camera actuator 1200 may include at least one of a first lens assembly, a second lens assembly, a third lens assembly, a fourth lens assembly, and a guide pin. In addition. The second camera actuator 1200 is a piezo actuator and can perform a high-magnification zooming function.

For example, the first lens assembly and the second lens assembly may be moving lenses that move through a driving element and a guide pin, and the third lens assembly and the fourth lens assembly may be fixed lenses, but are limited thereto. it is not going to be For example, the third lens assembly may perform the function of a focator that forms light at a specific location, and the first lens assembly re-images an image formed by the third lens assembly, which is a concentrator, at another location. It can perform a variator function. Meanwhile, in the first lens assembly, a change in magnification may be large because the distance to the subject or the image distance is greatly changed, and the first lens assembly, which is a variable magnification, may play an important role in changing the focal length or magnification of the optical system. On the other hand, the image formed by the first lens assembly, which is a variable magnifier, may be slightly different depending on the location. Accordingly, the second lens assembly may perform a position compensation function for an image formed by the variable magnifier. For example, the second lens assembly may perform a compensator function that serves to accurately form an image formed by the first lens assembly, which is a variable magnifier, at an actual image sensor position. For example, the first lens assembly and the second lens assembly may be driven by a driving element (eg, piezo, VCM, motor, etc.). The above information may be applied to a lens assembly to be described later.

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

4 is an exploded perspective view of a first camera actuator according to an embodiment.

Referring to FIG. 4 , the first camera actuator 1100 according to the embodiment includes a first shield can (not shown), a first housing 1120, a mover 1130, a rotating part 1140, and a first driving part 1150. ).

The mover 1130 may include a holder 1131 and an optical member 1132 seated on the holder 1131 . The rotation unit 1140 includes a rotation plate 1141 , a first magnetic body 1142 having a coupling force with the rotation plate 1141 , and a second magnetic body 1143 positioned within the rotation plate 1141 . In addition, the first driving unit 1150 includes a driving magnet 1151 , a driving coil 1152 , a Hall sensor unit 1153 and a first substrate unit 1154 .

The first shield can (not shown) may be located at the outermost side of the first camera actuator 1100 to surround the rotating unit 1140 and the first driving unit 1150 to be described later.

The first shield can (not shown) may block or reduce electromagnetic waves generated from the outside. Accordingly, the occurrence of malfunctions in the rotating unit 1140 or the first driving unit 1150 may be reduced.

The first housing 1120 may be located inside a first shield can (not shown). In addition, the first housing 1120 may be located inside the first substrate unit 1154 to be described later. The first housing 1120 may be coupled to or fitted with a first shield can (not shown).

The first housing 1120 may include a plurality of housing side parts. A first housing side part 1121 , a second housing side part 1122 , a third housing side part 1123 , and a fourth housing side part 1124 may be included.

The first housing side part 1121 and the second housing side part 1122 may be disposed to face each other. Also, the third housing side part 1123 and the fourth housing side part 1124 may be disposed between the first housing side part 1121 and the second housing side part 1122 .

The third housing side part 1123 may contact the first housing side part 1121 , the second housing side part 1122 , and the fourth housing side part 1124 . Also, the third housing side part 1123 may include a bottom surface from the first housing 1120 to the lower part.

Also, the first housing side portion 1121 may include a first housing hole 1121a. A first coil 1152a to be described below may be positioned in the first housing hole 1121a.

In addition, the second housing side portion 1122 may include a second housing hole 1122a. A second coil 1152b to be described later may be positioned in the second housing hole 1122a.

The first coil 1152a and the second coil 1152b may be coupled to the first substrate portion 1154 . In an embodiment, the first coil 1152a and the second coil 1152b may be electrically connected to the first substrate 1154 so that current may flow. This current is a component of the electromagnetic force that the first camera actuator can tilt with respect to the X-axis.

Also, the third housing side portion 1123 may include a third housing hole 1123a. A third coil 1152c to be described below may be positioned in the third housing hole 1123a. The third coil 1152c may be coupled to the first substrate portion 1154 . Further, the third coil 1152c is electrically connected to the first substrate portion 1154 so that current may flow therethrough. This current is a component of the electromagnetic force that the first camera actuator can tilt with respect to the Y-axis.

The fourth housing side portion 1124 may include a first housing groove 1124a. A first magnetic body 1142 to be described below may be disposed in an area facing the first housing groove 1124a. Accordingly, the first housing 1120 may be coupled to the rotation plate 1141 by magnetic force or the like.

In addition, the first housing groove 1124a according to the embodiment may be located on an inner surface or an outer surface of the fourth housing side part 1124 . Accordingly, the first magnetic material 1142 may also be disposed to correspond to the position of the first housing groove 1124a.

In addition, the first housing 1120 may include an accommodating portion 1125 formed by the first to fourth housing side parts 1121 to 1124 . A mover 1130 may be located in the accommodating part 1125 .

The mover 1130 includes a holder 1131 and an optical member 1132 seated on the holder 1131 .

The holder 1131 may be seated in the accommodating portion 1125 of the first housing 1120 . The holder 1131 is formed outside the outer surface of the first prism to the fourth prism corresponding to the first housing side part 1121, the second housing side part 1122, the third housing side part 1123, and the fourth housing side part 1124, respectively. side may be included.

A seating groove in which the second magnetic material 1143 can be seated may be disposed on an outer surface of the fourth prism facing the side part 1124 of the fourth housing.

The optical member 1132 may be seated on the holder 1131 . To this end, the holder 1131 may have a seating surface, and the seating surface may be formed by a receiving groove. The optical member 1132 may include a reflector disposed therein. However, it is not limited thereto. Also, the optical member 1132 may reflect light reflected from the outside (eg, an object) into the camera module. In other words, the optical member 1132 may improve spatial limitations of the first camera actuator and the second camera actuator by changing the path of the reflected light. As such, it should be understood that the camera module may provide a high range of magnification by extending the optical path while minimizing the thickness.

The rotation unit 1140 includes a rotation plate 1141, a first magnetic body 1142 having a coupling force with the rotation plate 1141, and a second magnetic body 1143 located in the rotation plate 1141.

The rotation plate 1141 may be combined with the mover 1130 and the first housing 1120 described above. The rotation plate 1141 may include an additional magnetic body (not shown) located therein.

Also, the rotation plate 1141 may be disposed adjacent to the optical axis. Thus, the actuator according to the embodiment can easily change the light path according to the tilt of the first and second axes, which will be described later.

The rotation plate 1141 may include a first protrusion spaced apart from each other in a first direction (X-axis direction) and a second protrusion spaced apart from each other in a second direction (Y-axis direction). Also, the first protrusion and the second protrusion may protrude in opposite directions. A detailed description of this will be given later.

In addition, the first magnetic body 1142 includes a plurality of yokes, and the plurality of yokes may be positioned to face each other with respect to the rotation plate 1141 . As an example, the first magnetic body 1142 may include a plurality of facing yokes. Also, the rotation plate 1141 may be positioned between the plurality of yokes.

As described above, the first magnetic body 1142 may be located in the first housing 1120 . Also, as described above, the first magnetic material 1142 may be seated on the inner or outer surface of the fourth housing side part 1124 . For example, the first magnetic material 1142 may be seated in a groove formed on an outer surface of the fourth housing side part 1124 . Alternatively, the first magnetic material 1142 may be seated in the aforementioned first housing groove 1124a.

And the second magnetic material 1143 may be located on the outer surface of the mover 1130, particularly the holder 1131. With this configuration, the rotating plate 1141 can be easily coupled to the first housing 1120 and the mover 1130 by the coupling force generated by the magnetic force between the second magnetic body 1143 and the first magnetic body 1142 therein. . In the present invention, the positions of the first magnetic body 1142 and the second magnetic body 1143 may be moved relative to each other.

The first driving unit 1150 includes a driving magnet 1151 , a driving coil 1152 , a Hall sensor unit 1153 and a first substrate unit 1154 .

The driving magnet 1151 may include a plurality of magnets. As an example, the driving magnet 1151 may include a first magnet 1151a, a second magnet 1151b, and a third magnet 1151c.

The first magnet 1151a, the second magnet 1151b, and the third magnet 1151c may be positioned on an outer surface of the holder 1131, respectively. Also, the first magnet 1151a and the second magnet 1151b may be positioned to face each other. In addition, the third magnet 1151c may be located on a bottom surface among outer surfaces of the holder 1131 . A detailed description of this will be given later.

The driving coil 1152 may include a plurality of coils. As an example, the driving coil 1152 may include a first coil 1152a, a second coil 1152b, and a third coil 1152c.

The first coil 1152a may be positioned opposite to the first magnet 1151a. Accordingly, the first coil 1152a may be positioned in the first housing hole 1121a of the first housing side part 1121 as described above.

Also, the second coil 1152b may be positioned opposite to the second magnet 1151b. Accordingly, the second coil 1152b may be positioned in the second housing hole 1122a of the second housing side portion 1122 as described above.

The first coil 1152a may be positioned to face the second coil 1152b. That is, the first coil 1152a may be symmetrically positioned with respect to the second coil 1152b in the first direction (X-axis direction). This may be equally applied to the first magnet 1151a and the second magnet 1151b. That is, the first magnet 1151a and the second magnet 1151b may be symmetrically positioned with respect to the first direction (X-axis direction). In addition, the first coil 1152a, the second coil 1152b, the first magnet 1151a, and the second magnet 1151b may be arranged to overlap at least partially in the second direction (Y-axis direction). With this configuration, the X-axis tilting can be accurately performed without tilting to one side by the electromagnetic force between the first coil 1152a and the first magnet 1151a and the electromagnetic force between the second coil 1152b and the second magnet 1151b. .

The third coil 1152c may be positioned opposite to the third magnet 1151c. Accordingly, the third coil 1152c may be located in the third housing hole 1123a of the third housing side part 1123 as described above. The third coil 1152c generates an electromagnetic force with the third magnet 1151c, so that the mover 1130 and the rotating part 1140 may tilt the Y axis with respect to the first housing 1120.

Here, X-axis tilting means tilting based on the X-axis, and Y-axis tilting means tilting based on the Y-axis.

The Hall sensor unit 1153 may include a plurality of Hall sensors. The Hall sensor corresponds to and is used interchangeably with the 'sensor unit' described later. As an example, the hall sensor unit 1153 may include a first hall sensor 1153a, a second hall sensor 1153b, and a third hall sensor 1153c.

The first Hall sensor 1153a may be located inside the first coil 1152a. The second Hall sensor 1153b may be disposed symmetrically with the first Hall sensor 1153a in a first direction (X-axis direction) and a third direction (Z-axis direction). Also, the second hall sensor 1153b may be located inside the second coil 1152b.

The first hall sensor 1153a may detect a magnetic flux change inside the first coil 1152a. Also, the second hall sensor 1153b may detect a magnetic flux change in the second coil 1152b. Accordingly, position sensing between the first and second magnets 1151a and 1151b and the first and second Hall sensors 1153a and 1153b may be performed. For example, the first and second hall sensors 1153a and 1153b may control X-axis tilt through the first camera actuator according to the embodiment.

Also, the third hall sensor 1153c may be located inside the third coil 1152c. The third hall sensor 1153c may detect a magnetic flux change inside the third coil 1152c. Accordingly, position sensing between the third magnet 1151c and the third Hall sensor 1153bc may be performed. The first camera actuator according to the embodiment may control Y-axis tilt through this.

The first substrate unit 1154 may be located below the first driving unit 1150 . The first substrate unit 1154 may be electrically connected to the driving coil 1152 and the hall sensor unit 1153 . For example, the first substrate unit 1154 may be coupled to the driving coil 1152 and the hall sensor unit 1153 through SMT. However, it is not limited to this method.

The first substrate portion 1154 may be positioned between a first shield can (not shown) and the first housing 1120 and coupled to the shield can 1101 and the first housing 1120 . The coupling method may be variously made as described above. Also, through the combination, the driving coil 1152 and the Hall sensor unit 1153 may be positioned within the outer surface of the first housing 1120 .

The first substrate unit 1154 includes a circuit board having wiring patterns that can be electrically connected, such as a rigid printed circuit board (Rigid PCB), a flexible printed circuit board (Flexible PCB), and a rigid flexible printed circuit board (Rigid Flexible PCB). can do. However, it is not limited to these types.

Details between the Hall sensor unit 1153 and the first substrate unit 1154 to be described later will be described later.

FIG. 5 is a perspective view of a first camera actuator according to an embodiment in which a shield can and a substrate are removed, FIG. 6 is a cross-sectional view taken along line BB' in FIG. 5 , and FIG. 7 is a cross-sectional view taken along line CC' in FIG. 5 .

Referring to FIGS. 5 to 7 , the first coil 1152a may be located on the side part 1121 of the first housing.

Also, the first coil 1152a and the first magnet 1151a may face each other. The first magnet 1151a may at least partially overlap the first coil 1152a in the second direction (Y-axis direction).

Also, it may be located on the second housing side part 1122 of the second coil 1152b. Accordingly, the second coil 1152b and the second magnet 1151b may be positioned to face each other. The second magnet 1151b may at least partially overlap the second coil 1152b in the second direction (Y-axis direction).

In addition, the first coil 1152a and the second coil 1152b are overlapped in the second direction (Y-axis direction), and the first magnet 1151a and the second magnet 1151b are overlapped in the second direction (Y-axis direction). can be nested with With this configuration, the electromagnetic force applied to the outer surfaces of the holder (the outer surface of the first holder and the outer surface of the second holder) is located on a parallel axis in the second direction (Y-axis direction), so that the X-axis tilt is accurate and precise. can be performed

In addition, a first accommodating groove (not shown) may be located on an outer surface of the fourth holder. In addition, first protrusions PR1a and PR1b may be disposed in the first accommodating groove. Accordingly, when the X-axis tilt is performed, the first protrusions PR1a and PR1b may be reference axes (or rotation axes) of the tilt. Accordingly, the rotation plate 1141 and the mover 1130 may move left and right.

As described above, the second protrusion PR2 may be seated in the groove of the inner surface of the fourth housing side part 1124 . Also, when the Y-axis tilt is performed, the rotation plate and the mover may rotate with the second protrusion PR2 as a reference axis of the Y-axis tilt.

According to the embodiment, OIS may be performed by the first protrusion and the second protrusion.

Referring to FIG. 6 , Y-axis tilt may be performed. That is, OIS can be implemented by rotating in the first direction (X-axis direction).

In an embodiment, the third magnet 1151c disposed below the holder 1131 forms an electromagnetic force with the third coil 1152c to tilt or rotate the mover 1130 in the first direction (X-axis direction). have.

Specifically, the rotation plate 1141 is coupled to the first housing 1120 and the mover 1130 by the first magnetic body 1142 in the first housing 1120 and the second magnetic body 1143 in the mover 1130. can Also, the first protrusions PR1 may be spaced apart in a first direction (X-axis direction) and supported by the first housing 1120 .

Also, the rotation plate 1141 may rotate or tilt the second protrusion PR2 protruding toward the mover 1130 on a reference axis (or rotation axis). That is, the rotation plate 1141 may perform Y-axis tilt with the second protrusion PR2 as a reference axis.

For example, the mover 1130 is moved along the X-axis by the first electromagnetic forces F1A and F1B between the third magnet 1151c disposed in the third seating groove and the third coil 1152c disposed on the side of the third substrate. OIS implementation may be performed while rotating (X1->X1b or X1a) at a first angle θ1 in the direction. The first angle θ1 may be between ±1° and 3°. However, it is not limited thereto.

Referring to FIG. 7 , X-axis tilt may be performed. That is, OIS can be implemented by rotating in the second direction (Y-axis direction).

OIS can be implemented while the mover 1130 tilts or rotates (or tilts the X axis) in the Y-axis direction.

In an embodiment, the first magnet 1151a and the second magnet 1151b disposed on the holder 1131 form electromagnetic force with the first coil 1152a and the second coil 1152b, respectively, in the second direction (Y). The rotation plate 1141 and the mover 1130 may be tilted or rotated in the axial direction).

The rotation plate 1141 may rotate or tilt (X-axis tilt) the first protrusion PR1 in the second direction about a reference axis (or rotation axis).

For example, the second electromagnetic force (F2A, OIS can be implemented while rotating the mover 1130 by a second angle (θ2) in the Y-axis direction (Y1->Y1a or Y1b) by F2B). The second angle θ2 may be between ±1° and 3°. However, it is not limited thereto. However, the second electromagnetic force (F2A, F2B) may be the direction of the electromagnetic force considering the movement of the mover (1130). For example, the electromagnetic force may act along the third direction (Z-axis direction). Further, the electromagnetic force may act on the first coil 1152a in a third direction, and the electromagnetic force may act on the second coil 1152b in a direction opposite to the third direction. At this time, the first magnet 1151a and the second magnet 1152b may move in the illustrated directions F2B and F2A by receiving force from the electromagnetic force.

As such, the first actuator according to the embodiment moves the rotating plate 1141 and the mover 1130 in the first direction (X-axis direction) or the second direction ( By controlling the rotation in the Y-axis direction), it is possible to minimize the occurrence of a decentent or tilt phenomenon when implementing OIS and to provide the best optical characteristics. In addition, as described above, 'Y-axis tilt' corresponds to rotation or tilt in the first direction (X-axis direction), and 'X-axis tilt' corresponds to rotation or tilt in the second direction (Y-axis direction) do.

FIG. 8 is a perspective view of a second camera actuator according to an embodiment, FIG. 9 is an exploded perspective view of the second camera actuator according to an embodiment, and FIG. 10 is a view taken along line DD′ in FIG. 8 .

8 to 10, the second camera actuator 1200 includes a base 1210, a first lens assembly 1220, a second lens assembly 1230, a third lens assembly 1240, and a second driving unit ( 1250), a guide part 1260, and a second substrate part 1270.

In addition, as described above, the third direction (Z-axis direction) corresponds to the optical axis direction, the second direction (Y-axis direction) corresponds to the direction from the second sidewall to the first sidewall, and the third direction (Z-axis direction) ) perpendicular to And, the first direction (X-axis direction) may mean a direction perpendicular to the second direction (Y-axis direction) and the third direction (Z-axis direction). In addition, the first direction (X-axis direction) is used interchangeably with 'height direction' or 'vertical direction', and the second direction (Y-axis direction) is used interchangeably with 'lengthwise direction' or 'horizontal direction'.

In addition, the second camera actuator 1200 includes a base 1210 disposed on one side, a first lens assembly 1220 disposed in the base 1210, a second lens assembly 1230, a base 1210 (or a first The third lens assembly 1240 disposed in front or in front of the lens assembly 1220, the second driving unit 1250 for moving the first lens assembly 1220 and the second lens assembly 1230, and the base 1210 It may include a guide portion 1260 and a second substrate portion 1270 at least partially disposed outside the base 1210 and electrically connected to the second driving portion 1250 .

In addition, the second camera actuator 1200 may include a first lens group G1, a second lens group G2, and a third lens group G3 seated on each lens assembly. For example, the first lens group G1 may be located in the first lens assembly 1220 . The first lens assembly 1220 may include an accommodating hole accommodating the first lens group G1. Also, the second lens group G2 may be located in the second lens assembly 1230 . The second lens assembly 1230 may include an accommodating hole accommodating the second lens group G2. Also, the third lens group G3 may be located in the third lens assembly 1240 . The third lens assembly 1240 may include an accommodating hole accommodating the third lens group G3. Furthermore, the second camera actuator may further include a fourth lens group G4 disposed in the base 1210 .

The first lens group G1, the second lens group G2, the third lens group G3, and the fourth lens group G4 may include a single lens or a plurality of lenses. Furthermore, the second camera actuator 1200 may further include an additional lens group (eg, a fifth lens group) including a plurality of lenses or a single lens.

Also, the third lens assembly 1240, the first lens assembly 1220, and the second lens assembly 1230 may be sequentially disposed along the optical axis direction (Z-axis direction). In addition, the third lens group G3, the first lens group G1, the second lens group G2, and the fourth lens group G4 may be sequentially disposed along the optical axis direction (Z-axis direction). The fourth lens group G4 may be positioned within the base 1210 and may be combined with the base 1210 . Accordingly, the fourth lens group G4 may be located in the base 1210 at the rear end of the second lens group G2.

In an embodiment, the first lens group G1 and the fourth lens group G4 may be relatively fixed with respect to the second lens group G2 and the third lens group G3. At least one of the first lens group G1 to the fourth lens group G4 may be D-cut, thereby providing improved optical characteristics compared to the diameter. For example, at least one of the lenses in the first to fourth lens groups G1 to G4 may have a non-circular shape. Furthermore, the thickness of the camera actuator can be further reduced by the structures of the base, the second substrate, the positioning magnet, and the positioning sensor, which will be described later.

Also, the first lens assembly 1220 and the second lens assembly 1230 may move along the optical axis by the second driving unit 1250 . In an embodiment, the first lens assembly 1220 and the second lens assembly 1230 may move relatively.

The second driving unit 1250 moves the first lens assembly 1251 and the second lens assembly 1230 side by side in the optical axis direction (Z-axis direction) to move the first lens assembly 1220 in the optical axis direction (Z-axis direction). A second lens driving unit 1252 that moves side by side may be included.

Also, the guide part 1260 may pass through any one of the first lens assembly 1220 and the second lens assembly 1230 . For example, the guide part 1260 may include a first guide pin 1261 penetrating the first lens assembly 1220 and a second guide pin 1262 penetrating the second lens assembly 1230. .

Also, the second substrate unit 1270 may be electrically connected to the second driving unit 1250 . For example, the second substrate portion 1270 may include a first sub substrate portion 1271 and a second sub substrate portion 1272 . The first sub substrate 1271 may be electrically connected to the first lens driving unit 1251 . Also, the second sub substrate 1272 may be electrically connected to the second lens driving unit 1252 . The first sub-board part 1271 and the second sub-board part 1272 may be electrically connected to the connector. Accordingly, the second camera actuator may be electrically connected to the processor of the electronic device or mobile device through the connector.

Furthermore, the second board unit 1270 is a circuit board having wiring patterns that can be electrically connected, such as a rigid printed circuit board (Rigid PCB), a flexible printed circuit board (Flexible PCB), and a rigid flexible printed circuit board (RigidFlexible PCB). can include However, it is not limited to these types.

In the following drawings, details of the second camera actuator 1200 among the camera modules according to the exemplary embodiment will be described.

Figure 11 is a perspective view of the base according to the embodiment, Figure 12 is a view viewed from K1 in Figure 11, Figure 13 is a rear view of the base according to the embodiment.

11 to 13 , a base 1210 according to an embodiment may include a receiving hole 1210h accommodating a first lens assembly, a second lens assembly, and a fourth lens group. For example, the base 1210 may have a rectangular parallelepiped shape having a space therein. In addition, the first lens assembly, the second lens assembly, and the fourth lens group may be sequentially disposed in the base 1210 along the optical axis direction (Z-axis direction).

The base 1210 according to the embodiment includes a base top surface 1211, a base bottom surface 1212, a first sidewall 1213, a second sidewall 1214, a third sidewall 1215, and a fourth sidewall 1216. can do.

First, the base 1210 may include a base upper surface 1211 and a base lower surface 1212 corresponding to the base upper surface 1211 . Any one of the upper surface of the base 1211 and the lower surface of the base 1212 may be coupled to the second substrate. Alternatively, any one of the first sidewall to the fourth sidewall may be coupled to the second substrate unit.

Furthermore, in the base 1210, the upper surface of the base 1211 and the lower surface of the base 1212 may include a connection hole, and may be electrically connected to an internal position sensor (eg, a hall sensor) through the connection hole. Alternatively, a position sensor may be accommodated in the connection hole. For example, the connection hole may be located in the base groove. Accordingly, the second substrate unit seated in the base groove may be electrically connected to the position sensor inside the second substrate unit through the connection hole. Thus, the position sensor can easily receive the magnetic field from the position magnet inside.

In addition, the base 1210 may include a first sidewall 1213 and a second sidewall 1214 corresponding to the first sidewall 1213 . The second sidewall 1214 may be positioned to face the first sidewall 1213 . As an example, the first sidewall 1213 may be symmetrically disposed with respect to the second sidewall 1214 in the third direction (Z-axis direction). The first sidewall 1213 and the second sidewall 1214 may be spaced apart from each other in a second direction (Y-axis direction). In addition, the first sidewall 1213 and the second sidewall 1214 may at least partially overlap each other in the second direction (Y-axis direction).

In addition, the base 1210 may further include a third sidewall 1215 and a fourth sidewall 1216 disposed between the first sidewall 1213 and the second sidewall 1214 and corresponding to each other.

The third sidewall 1215 and the fourth sidewall 1216 may be disposed perpendicular to the first sidewall 1213 and the second sidewall 1214 .

Also, the third sidewall 1215 may be positioned to correspond to the fourth sidewall 1216 . The third sidewall 1215 may face the fourth sidewall 1216 . As an example, the third sidewall 1215 may be symmetrically disposed with respect to the fourth sidewall 1216 in the second direction (Y-axis direction).

The third sidewall 1215 and the fourth sidewall 1216 may be spaced apart from each other in the second direction (Y-axis direction). In addition, the third sidewall 1215 and the fourth sidewall 1216 may at least partially overlap each other in the second direction (Y-axis direction).

The first sidewall 1213 , the second sidewall 1214 , the third sidewall 1215 , and the fourth sidewall 1216 may be formed as an integral injection molding or may be combined as separate components.

The third sidewall 1215 and the fourth sidewall 1216 may include a groove through which at least one of a first rod, a second rod, a first guide pin, and a second guide pin, which will be described later, passes through or is seated. For example, the first guide pin, the first rod, and the second rod may pass through the third sidewall 1215 and the fourth sidewall 1216 . Alternatively, the first guide pin, the second guide pin, the first rod, and the second rod may pass through the third sidewall 1215 and the fourth sidewall 1216 .

For example, the third sidewall 1215 and the fourth sidewall 1216 may include a hole through which the first rod, the second rod, the first guide pin, and the second guide pin pass or a groove into which the second guide pin is seated.

For example, the fourth sidewall 1216 includes a first rod hole SH1 through which a first rod passes, a second rod hole SH2 through which a second rod passes, and a first guide groove PG1 into which a first guide pin is seated. ) and a second guide groove PG2 in which the second guide pin is seated.

The first rod hole SH1 and the second rod hole SH2 may be positioned on the fourth sidewall 1216 .

Also, the first guide groove PG1 and the second guide groove PG2 may be located on an inner surface of the fourth sidewall 1216 . The first guide groove PG1 and the second guide groove PG2 may be offset from each other in a height direction or a first direction (X-axis direction). For example, the first guide groove PG1 and the second guide groove PG2 may be spaced apart from each other by a predetermined distance dd1 in the first direction (X-axis direction). Alternatively, the first guide groove PG1 and the second guide groove PG2 may have different distances from the lower surface 1212 or the upper surface 1211 of the base in the first direction or height direction.

The first rod hole SH1 and the second rod hole SH2 may be offset from each other in the height direction or the first direction (X-axis direction) of the fourth sidewall 1216 . Also, the first rod hole SH1 and the second rod hole SH2 may overlap at least partially in the second direction or the longitudinal direction.

For example, the first rod hole SH1 and the second rod hole SH2 may be spaced apart from each other by a predetermined distance dd1 in a first direction (X-axis direction) and a second direction (Y-axis direction). Alternatively, the first rod hole SH1 and the second rod hole SH2 may have different distances from the lower surface 1212 or the upper surface 1211 of the base in the first direction or the height direction.

Due to this configuration, the length of the base 1210 may decrease in the height direction. Accordingly, lengths in the height direction of the second camera actuator including the base 1210, the camera module including the second camera actuator, and the electronic device including the camera module may be reduced. Accordingly, it is possible to provide desired optical characteristics while reducing the size of the electronic device and the camera module.

Also, the center of the first rod hole SH1 and the center of the second guide groove PG2 may overlap or deviate from each other in the second direction (Y-axis direction). For example, the center of the first rod hole SH1 and the center of the second guide groove PG2 overlap in the second direction (Y-axis direction), so that even if the first lens assembly is moved by the first rod, the first lens assembly is An optical axis deviation between the first lens group and the second lens group in the second lens assembly may be minimized.

Also, the center of the second rod hole SH2 and the center of the first guide groove PG1 may overlap or deviate from each other in the second direction (Y-axis direction). For example, the center of the second rod hole SH2 and the center of the first guide groove PG1 overlap in the second direction (Y-axis direction) so that even if the second lens assembly moves by the second rod, the first lens assembly An optical axis deviation between the first lens group and the second lens group in the second lens assembly may be minimized.

The first lens assembly and the second lens assembly may be disposed between the first sidewall 1213 and the second sidewall 1214 . Accordingly, the first sidewall 1213 and the second sidewall 1214 may partially overlap the first lens assembly and the second lens assembly in the second direction or the longitudinal direction, or partially cover the first lens assembly and the second lens assembly. have.

Accordingly, the base 1210 may cover the first lens assembly and the second lens assembly. In addition, the side surface of the base 1210 may include base grooves BG1 and BG2 having bottom surfaces inclined with respect to the horizontal direction (Y-axis direction).

The base groove may include a first base groove BG1 and a second base groove BG2. A bottom surface of the first base groove BG1 may be located on the second sidewall 1214 . Also, the bottom surface of the second base groove BG2 may be located on the first sidewall 1213 . Furthermore, the first base groove BG1 and the second base groove BG2 may be symmetrically disposed in the first direction (X-axis direction) and the second direction (Y-axis direction). That is, the first base groove BG1 and the second base groove BG2 may be arranged diagonally with respect to the center (eg, optical axis) of each lens group. Similarly, the bottom surface of the first base groove BG1 and the bottom surface of the second base groove BG2 may also be positioned diagonally and symmetrically. Furthermore, a second substrate portion to be described below may be disposed on the bottom surface of the first base groove BG1 and the bottom surface of the second base groove BG2. In an embodiment, at least a part of the second substrate unit may be seated in the base groove. Also, the second substrate unit may be connected to the second driving unit. For example, the second substrate unit may be positioned in the first base groove and connected to the second driving unit (eg, the first lens driving unit). Also, the second substrate unit may be positioned in the second base groove and electrically connected to the second driving unit (eg, the second lens driving unit).

In addition, corresponding to the bottom surface of the first base groove BG1 and the bottom surface of the second base groove BG2, the first position magnet and the second position magnet may also be inclined at a predetermined angle with respect to the horizontal direction (Y-axis direction). have. For example, the bottom surface of the first base groove BG1 or the first location magnet may be inclined at a predetermined angle (eg, 30 degrees to 60 degrees) with respect to the horizontal direction (Y-axis direction). In addition, the bottom surface of the second base groove BG2 or the second location magnet may be inclined at a predetermined angle (eg, 30 degrees to 60 degrees) with respect to the horizontal direction (Y-axis direction). With this configuration, the length of the base 1210 in the first direction (X-axis direction) may not be affected by the second substrate portion, compared to a structure in which the second substrate portion is disposed above and below the base 1210. . Thus, the length of the second camera actuator may be reduced in the first direction (X-axis direction). That is, the compactness of the device can be achieved. Furthermore, the thickness of the camera module or electronic device including the second camera actuator may also be reduced.

division Example comparative example Barrels and gaps, etc. (including tolerances) 6.12 6.12 1st sub substrate Unapplied 0.13 2nd sub substrate Unapplied 0.13 lower margin 0.025 0.025 total thickness 6.145 6.405

Referring to Table 1, in the case of the embodiment, it can be seen that the first sub-sub-board part and the second sub-board part do not affect the thickness of the second camera actuator in the first direction. As such, the thickness of the second camera actuator and a camera device (or module) including the second camera actuator according to the embodiment may be reduced. Accordingly, miniaturization can be easily achieved. FIG. 14 is a view explaining coupling of the first elastic part in the first lens assembly according to the embodiment, FIG. 15 is a side view of the first lens assembly according to the embodiment, and FIG. 16 is a front view of a first lens assembly according to an embodiment, FIG. 17 is a top view of the first lens assembly according to an embodiment, FIG. 18 is a perspective view of a first elastic part according to an embodiment, and FIG. 19 is a top view of the first lens assembly according to an embodiment. It is a drawing showing a first elastic part and a first rod, and FIG. 20 is a top view of the first elastic part according to an embodiment.

Referring to FIGS. 14 to 20 , as described above, the first lens driving unit 1251 may include a first piezoelectric unit 1251a and a first rod 1251b. The first piezoelectric part 1251a may be connected to the first rod 1251b. Accordingly, the first piezoelectric unit 1251a contracts or expands in the optical axis direction, and correspondingly, the first rod 1251b may also move in the optical axis direction or in a direction opposite to the optical axis direction.

Furthermore, the first lens assembly 1220 may include a first positioning magnet 1222 coupled to the first lens assembly 1220 . The first lens assembly 1220 may include a first elastic part 1223 connected to the first rod 1251b.

Also, as described above, the second lens driving unit 1252 may include a second piezoelectric unit 1252a and a second rod 1252b. The second piezoelectric part 1252a may be connected to the second rod 1252b. Accordingly, the second piezoelectric unit 1252a contracts or expands in the optical axis direction, and correspondingly, the second rod 1252b may also move in the optical axis direction or in a direction opposite to the optical axis direction.

Furthermore, the second lens assembly 1230 may include a second positioning magnet 1232 coupled to the second lens assembly 1230 . Also, the second lens assembly 1230 may include a second elastic part 1233 connected to the second rod 1252b.

In an embodiment, the first elastic part 1223 may include a first area A1 in contact with the first lens assembly 1220, a first curvature area CA1 extending from the first area A1 and having a curvature, and a first area A1 having a curvature. A second area A2 extending from the curvature area CA1 and facing the first area A1 may be included.

As an example, the first area A1 may be disposed inside the first elastic part. Also, the first curvature area CA1 may be bent or bent at one side of the area A1. Accordingly, the first curvature area CA1 may have a curvature. Also, the second area A2 may extend from one end of the first curvature area CA1. At least a portion of the second area A2 may extend along the first direction (X-axis direction). Accordingly, a portion of the second area A2 may extend parallel to a portion of the first area A1 along the first direction (X-axis direction). Also, the first area A1 and the second area A2 may be spaced apart in a second direction or a horizontal direction (Y-axis direction). Also, the first rod 1251b may be disposed between the first area A1 and the second area A2.

The first area A1 , the first curvature area CA1 , and the second area A2 may be integrally formed. Due to this configuration, a uniform force by the first elastic part 1223 may be applied to the first rod 1251b located between the first area A1 and the second area A2. Accordingly, even if the first rod 1251b is connected to the first piezoelectric part to be described later and repeatedly extends and contracts, the first elastic part 1223 applies pressure to the first rod 1251b uniformly, so that the first lens 1251b is uniformly applied. Movement of assembly 1220 can also be performed accurately.

Furthermore, the first lens assembly 1220 may include a first lens groove LG1. The first lens groove LG1 may be located on the first side surface LSS1 that is one side surface of the first lens assembly 1220 . For example, the first side surface LSS1 of the first lens assembly 1220 may be located on a side surface adjacent to the first positioning magnet 1222 .

Also, the first area A1 may include a first elastic groove AG1 corresponding to the first lens groove LG1. The first elastic groove AG1 may be located in the first lens groove LG1. That is, the first elastic groove AG1 may be seated in the first lens groove LG1.

Unlike the first area A1, the second area A2 may extend along the first direction (X-axis direction). Furthermore, a bonding member may be positioned in the first lens groove LG1 of the first lens assembly 1220 to improve coupling between the first elastic groove AG1 and the first lens assembly 1220 . A bonding member may be applied between the first elastic groove AG1 and the first lens groove LG1.

As a modified example, the second area A2 may include the second elastic groove AG2. The second elastic groove AG2 may be disposed to face the first elastic groove AG1. The first elastic groove AG1 and the second elastic groove AG2 may be symmetrically disposed in the first direction (X-axis direction). As a result, the pressing force applied to the first rod may be uniform.

Alternatively, the second elastic groove AG2 and the first elastic groove AG1 may be different from each other based on the first direction (X-axis direction).

Also, as an embodiment, the length Lk of the first curvature area CA1 in the optical axis direction (Z-axis direction) may be smaller than the length Lm of the first area A1 in the optical axis direction (Z-axis direction). . In addition, the length Lk of the first curvature area CA1 in the optical axis direction (Z-axis direction) may be smaller than the length Ln of the second area A2 in the optical axis direction (Z-axis direction). With this configuration, a space for the first coupling protrusion 1224 to be described later can be easily secured. In addition, the first elastic part (eg, the first area) is accommodated in the space by the first coupling protrusion 1224, so that the coupling force between the first elastic part 1223 and the first lens assembly 1220 can be improved.

In an embodiment, the first coupling protrusion 1224 may be located on the first side surface LSS1. Also, the first coupling protrusion 1224 may extend outward from the first side surface LSS1 . For example, the first coupling protrusion 1224 may extend along the second direction (Y-axis direction) or the horizontal direction from the first side surface LSS1 .

Also, the first coupling protrusion 1224 may include a base area BA and an extension area EA. The base area BA may overlap the first curvature area CA1 in the optical axis direction (Z-axis direction). Also, the base area BA may contact the first side surface LSS1 .

The extension area EA may contact the base area BA and may extend along the first direction (X-axis direction). For example, the extension area EA may extend to the second area A2. That is, the extension area A2 may extend in a direction opposite to the first curvature area.

The extension area EA may at least partially overlap the second area A2 in the optical axis direction. Due to this configuration, the extension area EA may be coupled to the first elastic part 1223 . That is, the first lens assembly 1220 may be coupled to the first elastic part 1223 .

Also, the number of first coupling protrusions 1224 may be plural. For example, the plurality of first coupling protrusions 1224 may be spaced apart along the optical axis direction (Z-axis direction). The plurality of first coupling protrusions 1224 may be positioned on the first side surface LSS1. Also, as described above, the first curvature area CA1 may be positioned between the spaced apart first coupling protrusions 1224 .

The first elastic part 1223 may include a third area A3 extending from the second area A2 to the first lens assembly 1220 . The third area A3 may be a bent or bent portion extending from the second area A2. The third area A3 may extend in the second direction (Y-axis direction) or in the horizontal direction.

Furthermore, the third area A3 may include an elastic hole 1223h. The first fastening protrusion 1225 located on the lower surface of the first lens assembly 1220 may be accommodated in the elastic hole 1223h. With this configuration, coupling force between the first elastic part 1223 and the first lens assembly 1220 may be improved. Furthermore, the first fastening protrusion 1225 may protrude from the lower surface of the first lens assembly 1220 in a first direction (X-axis direction).

The first lens assembly 1220 may include a first magnet groove MG1. Also, the first lens assembly 1220 may include a first positioning magnet 1222 disposed in the first magnet groove MG1.

The first magnet groove MG1 or the first positioning magnet 1222 may be inclined by less than 90 degrees with respect to the horizontal direction (Y-axis direction). For example, the first magnet groove MG1 or the first position magnet 1222 may be inclined at a predetermined angle (eg, 30 degrees to 60 degrees, θa) in the horizontal direction (Y-axis direction).

Corresponding to the aforementioned first lens assembly 1220, the second lens assembly 1230 may also have the same structure as the first lens assembly 1220. In this case, as described above, the second lens assembly 1230 may be symmetrical in a diagonal direction with respect to the first lens assembly 1220 .

As an example, the fourth area A4 may be disposed inside the second elastic part. Also, the second curvature area CA2 may be bent or bent at one side of the area A1. Accordingly, the second curvature area CA2 may have a curvature. Also, the fifth area A5 may extend from one end of the second curvature area CA2 . At least a portion of the fifth area A5 may extend along the first direction (X-axis direction). Accordingly, a portion of the fifth area A5 may extend parallel to a portion of the fourth area A4 along the first direction (X-axis direction). Also, the fourth area A4 and the fifth area A5 may be spaced apart in a second direction or a horizontal direction (Y-axis direction). Also, the second rod 1252b may be disposed between the fourth area A4 and the fifth area A5.

The fourth area A4, the second curvature area CA2, and the fifth area A5 may be integrally formed. Due to this configuration, a uniform force by the second elastic part 1233 may be applied to the second rod 1252b located between the fourth area A4 and the fifth area A5. Accordingly, even if the second rod 1252b is connected to the second piezoelectric part to be described later and repeats extension and contraction, the pressure applied to the second rod 1252b by the second elastic part 1233 is uniform, and the second lens Movement of assembly 1230 can also be performed accurately.

Furthermore, the second lens assembly 1230 may include a second lens groove LG2. The second lens groove LG2 may be located on the second side surface LSS2 that is one side surface of the second lens assembly 1230 . For example, the second side surface LSS2 of the second lens assembly 1230 may be positioned adjacent to the second positioning magnet 1232 .

Also, the fourth area A4 may include a third elastic groove AG3 corresponding to the second lens groove LG2. The third elastic groove AG3 may be located in the second lens groove LG2. That is, the third elastic groove AG3 may be seated in the second lens groove LG2.

Unlike the fourth area A4, the fifth area A5 may extend along the first direction (X-axis direction). Furthermore, a coupling member may be positioned in the second lens groove LG2 of the second lens assembly 1230 to improve coupling between the third elastic groove AG3 and the second lens assembly 1230 . A bonding member may be applied between the third elastic groove AG3 and the second lens groove LG2.

As a modified example, the fifth area A5 may include the fourth elastic groove AG4. The fourth elastic groove AG4 may be disposed to face the fourth elastic groove AG4. The fourth elastic groove AG4 and the fourth elastic groove AG4 may be symmetrically disposed in the first direction (X-axis direction).

In addition, as an embodiment, corresponding to the above description, the length Lk in the optical axis direction (Z-axis direction) of the second curvature area CA2 is the length (Lk) in the optical axis direction (Z-axis direction) of the fourth area A4. Lm) may be smaller than Also, the length Lk of the second curvature area CA2 in the optical axis direction (Z-axis direction) may be smaller than the length Ln of the fifth area A5 in the optical axis direction (Z-axis direction). With this configuration, a space for the second coupling protrusion 1234 to be described later can be easily secured. In addition, the second elastic part (eg, the fourth area) is accommodated in the space by the second coupling protrusion 1234, so that the coupling force between the second elastic part 1233 and the second lens assembly 1230 can be improved.

In an embodiment, the second coupling protrusion 1234 may be located on the second side surface LSS2. Also, the second coupling protrusion 1234 may extend outward from the second side surface LSS2 . For example, the second coupling protrusion 1234 may extend along the second direction (Y-axis direction) or the horizontal direction from the second side surface LSS2 .

Also, the second coupling protrusion 1234 may include a base area BA and an extension area EA. The base area BA may overlap the second curvature area CA2 in the optical axis direction (Z-axis direction). Also, the base area BA may contact the second side surface LSS2 .

The extension area EA may contact the base area BA and may extend along the first direction (X-axis direction). For example, the extension area EA may extend to the fifth area A5. That is, the extension area A2 may extend in a direction opposite to the first curvature area.

The extension area EA may at least partially overlap the fifth area A5 in the optical axis direction. Due to this configuration, the extension area EA may be coupled to the second elastic part 1233 . That is, the first lens assembly 1220 may be coupled to the second elastic part 1233 .

Also, the number of second coupling protrusions 1234 may be plural. For example, the plurality of second coupling protrusions 1234 may be spaced apart from each other along the optical axis direction (Z-axis direction). The plurality of second coupling protrusions 1234 may be positioned on the second side surface LSS2 . And, as described above, the second curvature area CA2 may be positioned between the spaced apart second coupling protrusions 1234 .

The second elastic part 1233 may include a sixth area A6 extending from the fifth area A5 to the second lens assembly 1230 . The sixth area A6 may be a bent or bent portion extending from the fifth area A5. The sixth area A6 may extend in the second direction (Y-axis direction) or in the horizontal direction.

Furthermore, the sixth area A6 may include an elastic hole 1233h. The second fastening protrusion 1235 located on the lower surface of the second lens assembly 1230 may be accommodated in the elastic hole 1233h. With this configuration, coupling force between the second elastic part 1233 and the second lens assembly 1230 may be improved. Furthermore, the second fastening protrusion 1235 may protrude from the lower surface of the second lens assembly 1230 along the first direction (X-axis direction).

The second lens assembly 1230 may include a second magnet groove MG2. Also, the second lens assembly 1230 may include a second positioning magnet 1232 disposed in the second magnet groove MG2.

The second magnet groove MG2 or the second position magnet 1232 may be inclined by less than 90 degrees with respect to the horizontal direction (Y-axis direction). For example, the second magnet groove MG2 or the second position magnet 1232 may be inclined at a predetermined angle (eg, 30 degrees to 60 degrees) in a horizontal direction (Y-axis direction).

21 is a perspective view of a first lens assembly, a second lens assembly, a guide pin, and a second driving unit according to an embodiment, and FIG. 22 is a perspective view of a first lens assembly, a second lens assembly, a guide pin, and a second driving unit according to an embodiment. 23 is a bottom view of a first lens assembly, a second lens assembly, a guide pin, and a second driving unit according to an embodiment, and FIG. 24 is a first lens assembly according to an embodiment, a second lens assembly, A rear view of a guide pin and a second drive unit, FIG. 25 is a front view of a first lens assembly, a second lens assembly, a guide pin, and a second drive unit according to an embodiment, and FIG. 26 is a view of a second camera actuator according to an embodiment. 27 is a diagram illustrating forward movement by the second driving unit, and FIG. 27 is a diagram illustrating backward movement by the second driving unit of the second camera actuator according to an exemplary embodiment.

Referring to FIGS. 21 to 25 , a second driving unit 1250 according to an embodiment may include a first lens driving unit 1251 and a second lens driving unit 1252 .

As described above, the first lens driving unit 1251 may include a first piezoelectric unit 1251a and a first rod 1251b. The first piezoelectric part 1251a may be connected to the first rod 1251b. Accordingly, the first piezoelectric unit 1251a contracts or expands in the optical axis direction, and correspondingly, the first rod 1251b may also move in the optical axis direction or in a direction opposite to the optical axis direction.

Furthermore, the first lens assembly 1220 includes a first positioning magnet 1222 coupled to the first lens assembly 1220 and a first elastic part 1223 connecting the first rod 1251b and the first lens assembly. can include

Also, as described above, the second lens driving unit 1252 may include a second piezoelectric unit 1252a and a second rod 1252b. The second piezoelectric part 1252a may be connected to the second rod 1252b. Accordingly, the second piezoelectric unit 1252a contracts or expands in the optical axis direction, and correspondingly, the second rod 1252b may also move in the optical axis direction or in a direction opposite to the optical axis direction.

Furthermore, the second lens assembly 1230 includes a second positioning magnet 1232 coupled to the second lens assembly 1230 and a second elastic part 1233 connecting the second rod 1252b and the second lens assembly. can include

In an embodiment, the length L1 of the first rod 1251b in the optical axis direction (Z-axis direction) may be the same as or different from the length L2 of the second rod 1252b in the optical axis direction (Z-axis direction). . For example, at least one of the first rod 1251b and the second rod 1252b may pass through the third side of the base. However, as described above, it is not limited to this structure.

The above contents may be applied to the first elastic part 1223 and the second elastic part 1233 in the same way.

Furthermore, in the second camera actuator according to an embodiment of the present invention, the first lens assembly 1220 includes a first lens barrel 1221, a first positioning magnet 1222, a first elastic part 1223, and a first coupling protrusion. And it may include a first fastening protrusion.

The second lens assembly 1230 may include a second lens barrel 1231 , a second positioning magnet 1232 , a second elastic part 1233 , a second coupling protrusion, and a second fastening protrusion.

Furthermore, the first lens assembly 1220 may include a first magnet groove MG1 in which the first positioning magnet 1222 is seated. The first magnet groove may contact a side surface of the first lens barrel 1221 . For example, in the first lens assembly 1220, the first lens barrel 1221, the first coupling protrusion, the first fastening protrusion, and the first magnet groove MG1 may be integrally formed.

The second lens assembly 1230 may include a second magnet groove MG2 in which the second positioning magnet 1232 is seated. The second magnet groove MG2 may contact a side surface of the second lens barrel 1231 . For example, in the second lens assembly 1230, the second lens barrel 1231, the second coupling protrusion, the second fastening protrusion, and the second magnet groove may be integrally formed.

First, the first lens barrel 1221 may accommodate the first lens group as described above. In addition, the first position magnet 1222 may be seated in the first magnet groove MG1 connected to the first lens barrel 1221, and the first position magnet 1222 may move in response to the movement of the first lens barrel 1221. can also move.

As described above, the second lens barrel 1231 may accommodate the second lens group. In addition, the second position magnet 1232 may be seated in the second magnet groove MG2 connected to the second lens barrel 1231, and correspond to the movement of the second lens barrel 1231. ) can also be moved.

Also, the first piezoelectric part 1251a and the second piezoelectric part 1252a may be electrically connected to the second substrate part. Through this, the first piezoelectric part 1251a and the second piezoelectric part 1252a may receive power. A circuit pattern for supplying power to the first piezoelectric portion 1251a and the second piezoelectric portion 1252a may be printed on the second substrate portion.

Furthermore, the first piezoelectric part 1251a and the second piezoelectric part 1252a may be connected to the second substrate part. Also, the first piezoelectric part 1251a and the second piezoelectric part 1252a may contract or expand in the optical axis direction when a voltage is applied. The first piezoelectric part 1251a and the second piezoelectric part 1252a may be formed in a disk shape, but are not limited thereto. The first piezoelectric part 1251a and the second piezoelectric part 1252a may be piezoelectric ceramics.

The first piezoelectric part 1251a and the second piezoelectric part 1252a may be formed of various types of piezoelectric elements. The first piezoelectric part 1251a and the second piezoelectric part 1252a may be bimorph piezoelectric elements, but are not limited thereto.

As an example, the first piezoelectric part 1251a and the second piezoelectric part 1252a may be formed of a plurality of layers. For example, the first piezoelectric part 1251a and the second piezoelectric part 1252a may be formed of two layers. Alternatively, the first piezoelectric part 1251a and the second piezoelectric part 1252a may be formed of three layers. For example, the first piezoelectric part 1251a and the second piezoelectric part 1252a may include the first piezoelectric element layer PL1, the second piezoelectric element layer PL2, the first piezoelectric element layer PL1 and the second piezoelectric element layer PL1, respectively. A center layer CE disposed between the device layers PL2 may be included.

The first piezoelectric element layer PL1 and the second piezoelectric element layer PL2 have piezoelectric properties and may be spaced apart from each other along an optical axis. The first piezoelectric element layer PL1 and the second piezoelectric element layer PL2 may be electrically connected. Accordingly, the same voltage V1, which is one pole, may be applied. A specific voltage V2, which is the other pole, may be applied to the center layer CE sandwiched between both surfaces of the first piezoelectric element layer PL1 and the second piezoelectric element layer PL2.

For example, when the above-described voltages V1 and V2 are applied to the first piezoelectric element layer PL1, the second piezoelectric element layer PL2, and the center layer CE, the first piezoelectric element layer PL1 and the second piezoelectric element layer PL1 Positive charges and negative charges in the device layer PL2 may be aligned in a polarization direction in an arbitrary arrangement. Then, when (+, -) voltages are alternately applied to the first piezoelectric element layer PL1 and the second piezoelectric element layer PL2 and the center layer CE connected in parallel, the first piezoelectric part 1251a and the second piezoelectric element layer 1251a are formed. 2 The piezoelectric part 1252a expands and contracts.

That is, the first piezoelectric unit 1251a and the second piezoelectric unit 1252a can perform vibration by varying the frequency within a wide frequency range of 0 to 300Hz, unlike a linear vibration motor, VCM, etc. due to the inherent characteristics of the piezoelectric type. have.

Therefore, in the second camera actuator according to the embodiment, it is possible to finely control the magnitude and speed of vibration by adjusting the frequency within the range of 0 to 300 Hz, resulting in a delicate and simultaneous vibration effect tailored to the sound and image of the mobile terminal can feel

In addition, it is preferable to use a material having good electrical conductivity and being stretchable for the center layer CE. The first and second piezoelectric parts of the present invention may be thin because they are used in electronic devices such as smart phones. Thus, the compactness of the camera actuator or camera module can be achieved. For example, the center layer CE may be connected to the second substrate portion or formed integrally with the second substrate portion.

In addition, although it is preferable to use PZT-based piezoelectric ceramics for the first piezoelectric element layer PL1 and the second piezoelectric element layer PL2, The material is not limited thereto.

In addition, when the first piezoelectric element layer (PL1) and the second piezoelectric element layer (PL2) are formed only with polycrystalline ceramic (Hard PZT), cracks are likely to occur when vibration occurs due to bending or when a product is dropped or impacted. One of composite materials such as PZT-PVDF (Polyvinylidene fluoride), PZT-silicone rubber, PZT-epoxy, PZT-foam polymer and polymer materials such as PVDF, P(VDF-TrFE), P(VDF-TeFE), and TGS By forming the first piezoelectric element layer (PL1) and the second piezoelectric element layer (PL2) by selectively using, it is possible to prevent cracks from occurring by improving durability while reducing the thickness. However, as described above, it is not limited to these materials.

The first rod 1251b and the second rod 1252b may be perpendicularly coupled to the first piezoelectric part 1251a and the second piezoelectric part 1252a. For example, the first rod 1251b and the second rod 1252b may extend in an optical axis direction.

In addition, the first rod 1251b and the second rod 1252b are contracted or expanded according to the contraction or expansion of the first piezoelectric part 1251a and the second piezoelectric part 1251a and the second piezoelectric part 1252a. ) can move along the vertical direction of A driving force may be transmitted to the movable lens group assembly through the movement of the first rod 1251b and the second rod 1252b.

The position sensors PS1 and PS2 may be arranged to correspond to the position magnets. When the number of magnet scalers is plural, the number of sensors may also be plural. The sensor may be a 2D or 3D hall sensor capable of measuring 2 or 3 dimensional magnetic fields. However, it is not limited to these types.

The position sensors PS1 and PS2 may also be disposed inclined at a predetermined angle with respect to the horizontal direction corresponding to the position magnet. For example, the position sensors PS1 and PS2 may be inclined at an angle of 90 degrees or less with respect to the horizontal direction. Accordingly, the position sensors PS1 and PS2 may be disposed side by side (eg, parallel) with respect to corresponding position magnets. For example, the first position sensor PS1 may be arranged in parallel with the first position magnet 1222 . Also, the second position sensor PS2 may be disposed in parallel with the second position magnet 1232 .

Furthermore, the position sensors PS1 and PS2 may also be located in the upper or lower surface of the base. That is, the position sensors PS1 and PS2 may be located below the upper surface of the base and located above the lower surface of the base. Alternatively, the position sensors PS1 and PS2 may be located between the upper and lower surfaces of the base. By this configuration, the substrate portion connected to the position sensors PS1 and PS2 may also be located in the base. Accordingly, the length of the base may be minimized in the first direction. Accordingly, the thickness of the camera actuator and a camera module or electronic device including the same may be reduced.

Also, the first position sensor PS1 may be disposed to face the first position magnet 1222 . The first position sensor PS1 may sense the position of the second lens assembly 1230 by measuring a magnetic field component from the magnetic field of the first position magnet 1222 . A second position sensor PS2 may be disposed to face the second position magnet 1232 . The second position sensor PS2 may sense the position of the third lens group assembly 1300 by measuring a magnetic field component from the magnetic field of the second position magnet 1232 . For example, the first positioning magnet 1222 may be coupled to the first lens barrel 1221 and may include a plurality of poles in which a plurality of N poles and a plurality of S poles are sequentially and alternately disposed. This may be the same for the second positioning magnet 1132 as well. That is, the second position magnet 1232 may be coupled to the second lens barrel 1231 and may include a plurality of poles in which a plurality of N poles and a plurality of S poles are alternately disposed.

According to one embodiment, the sensor may be disposed by being coupled to the housing of the camera module 100 . According to another embodiment, the sensor may be disposed in a non-moving lens group assembly (ie, a fixed group) included in the first camera actuator 1000 . For example, when the first lens group assembly 1100 is a fixed group, the sensor may be disposed on the first lens group assembly 1100 .

In addition, the length L1 of the first rod 1251b in the optical axis direction (Z-axis direction) may be the same as or different from the length L2 of the second rod 1252b in the optical axis direction (Z-axis direction).

For example, the length L1 of the first rod 1251b in the optical axis direction (Z-axis direction) may be different from the length L2 of the second rod 1252b in the optical axis direction (Z-axis direction). However, the first rod 1251b and the second rod 1252b may partially overlap in the second direction (Y-axis direction) and may not overlap with other portions.

The first guide pin 1261 and the second guide pin 1262 have lengths L3 and L4 in the optical axis direction (Z-axis direction) of the first rod 1251b and the second rod 1252b in the optical axis direction (Z-axis direction). direction) may be greater than the lengths L1 and L2.

The first guide pin 1261 may pass through the first lens barrel 1221 in the first lens assembly 1220 . The second guide pin 1262 may pass through the second lens barrel 1231 in the second lens assembly 1230 . Furthermore, it may extend in the optical axis direction (Z-axis direction) of the first guide pin 1261 and the second guide pin 1262 .

The first guide pin 1261 may include first pin holders PH1a and PH1b that pass through the first lens barrel 1221 and have a groove or a spaced gap gp1 from the second lens barrel 1231. can That is, the first lens assembly 1220 may include first pin holders PH1a and PH1b.

In addition, the second guide pin 1262 may include second pin holders PH2a and PH2b that pass through the second lens barrel 1231 and have a groove or gap gp2 spaced from the first lens barrel 1221. can Also, the second lens assembly 1230 may include second pin holders PH2a and PH2b.

The second guide pin 1262 is positioned in the spaced gap gp1 of the first pin holders PH1a and PH1b to prevent optical axis distortion between the first lens group of the first lens assembly and the second lens group of the second lens assembly. can be reduced The first pin holders PH1a and PH1b may cover at least a portion of the second guide pin 1262 .

In addition, the first guide pin 1261 is located in the spaced gap gp2 of the second pin holders PH2a and PH2b, so that the optical axis between the first lens group of the second lens assembly and the second lens group of the second lens assembly distortion can be reduced. Also, the second pin holders PH2a and PH2b may cover at least a portion of the first guide pin 1261 .

Referring further to FIG. 26 , the piezoelectric parts (corresponding to the first and second piezoelectric parts) may expand and contract according to an applied voltage. For example, the piezoelectric part may expand when the applied voltage increases (F1aa, FIG. 22) and contract when the voltage decreases (F1ab, FIG. 22).

The expansion and contraction of the piezoelectric part is controlled according to the first drive signal PS1, and the position of the elastic part (corresponding to the first and second elastic parts) may be changed in the rod (corresponding to the first and second rods).

For example, when a voltage is applied for a predetermined time (t0 to t1) and the pressing part and the rod are stretched at a predetermined speed or less, the position of the elastic part in the rod may be the same. That is, the distance between the elastic part and the pressing part can be maintained (d1).

However, when a voltage is applied for a predetermined time (t1 to t2) and the pressing part and the rod are contracted at a speed greater than a predetermined speed, the position of the elastic part may be changed in the rod. The total voltage ST2 applied during the times t1 to t2 may be the same as the total voltage ST1 applied during the times t0 to t1. For example, the magnitude of the voltage may be greater at times t1 to t2 than at times t0 to t1. This can be changed according to the piezoelectric part. Hereinafter, when a positive voltage is applied to the piezoelectric unit, the length of the piezoelectric unit is extended in a third direction (Z-axis direction), and when a -voltage is applied to the piezoelectric unit, the length of the piezoelectric unit is reduced in a third direction (Z-axis direction).

Accordingly, the position of the elastic part is maintained by inertia, so that the relative position of the rod may be the same as that of the stretching direction. That is, the distance between the elastic part and the pressing part may increase (increase from d1 to d2). That is, when the first driving signal PS1 is finally applied, the first lens barrel may move in the third direction by increasing the position (separation distance) between the piezoelectric part and the elastic part even though the length of the piezoelectric part is the same.

This first driving signal PS1 may be repeated several times for a predetermined period of time. For example, the first driving signal may be repeatedly applied to the piezoelectric unit 100 times per second. Accordingly, the first driving signal of one period may move the first elastic part in the third direction.

27, the expansion and contraction of the piezoelectric part is controlled according to the second drive signal PS1', and the position of the elastic part (corresponding to the first and second elastic parts) is changed in the rod (corresponding to the first and second rods). It can be.

For example, when a voltage is applied for a predetermined period of time (t0' to t1') and the pressing unit and the rod are contracted at a predetermined speed or less, the elastic unit may have the same position in the rod. That is, the distance between the elastic part and the pressing part can be maintained (d3).

However, when a voltage is applied for a predetermined time (t1' to t2') and the pressing part and the rod are stretched at a speed greater than a predetermined speed, the position of the elastic part may be changed in the rod. The total voltage ST2' applied during the times t1' to t2' may be the same as the total voltage ST1' applied during the times t0' to t1'. For example, the magnitude of the voltage may be greater at times t1 to t2' than at times t0' to t1'. As described above, this may be changed according to the piezoelectric part.

Accordingly, the position of the elastic part is maintained by inertia, so that the relative position of the rod may be the same as that of the stretching direction. That is, the distance between the elastic part and the piezoelectric part may decrease (decrease from d3 to d4). That is, when the second driving signal PS1′ is finally applied, the second lens barrel may move in a direction opposite to the third direction so that the position between the piezoelectric part and the second lens barrel decreases even though the length of the final piezoelectric part is the same. .

This second driving signal PS1' may be repeated several times for a predetermined period of time. For example, the second driving signal may be repeatedly applied to the piezoelectric unit 100 times per second. Accordingly, the second driving signal of one period may move the first elastic part in the third direction to press the rotating part and perform yaw tilt.

28 is a perspective view of a first lens assembly, a second lens assembly, a guide pin, a second driving unit, and a second substrate unit according to an embodiment, and FIG. 29 is a first lens assembly, a second lens assembly, and a guide pin according to an embodiment. , A top view of the second driving unit and the second substrate unit, and FIG. 30 is a front view of the first lens assembly, the second lens assembly, the guide pin, the second driving unit, and the second substrate unit according to the embodiment.

28 to 30 , a first lens driving unit 1251 according to an embodiment includes a first piezoelectric unit 1251a and a first rod 1251b, and further includes first coupling members 1251c and 1251d. can include more. The number of first coupling members 1251c and 1251d may be plural, and may contact inner or outer surfaces of the third and fourth side surfaces of the base. Alternatively, either of the first coupling members 1251c or 1251d may come into contact with an inner surface or an outer surface of a surface facing the third lens assembly in the optical axis direction. The first coupling members 1251c and 1251d may be coupled to the base, the first lens assembly, or the third lens assembly when the first rod 1251b contracts and expands along the optical axis direction. have. Furthermore, the first coupling members 1251c and 1251d may be made of an elastic material.

Correspondingly, the second lens driving unit 1252 according to the embodiment includes a second piezoelectric unit 1252a and a second rod 1252b, and may further include second coupling members 1252c and 1252d. The number of second coupling members 1252c and 1252d may be plural, and may contact inner or outer surfaces of the third and fourth side surfaces of the base. Alternatively, one of the second coupling members 1252c and 1252d may come into contact with an inner surface or an outer surface of a surface facing in the optical axis direction of the third lens assembly. The second coupling members 1252c and 1252d may be coupled to the base, the second lens assembly, or the third lens assembly when the second rod 1252b contracts and expands along the optical axis direction. have. Furthermore, the second coupling members 1252c and 1252d may be made of an elastic material.

Accordingly, the above-described first rod 1251b and second rod 1252b may vibrate at the above-described predetermined frequency along the optical axis direction. At this time, the first rod 1251b and the second rod 1252b may vibrate several micrometers, preferably less than several tens of nanometers, along the optical axis direction. The first coupling member and the second coupling member may suppress damage to the base and the first to third lens assemblies caused by the vibration of the first rod 1251b and the second rod 1252b.

As described above, the second substrate portion 1270 is disposed on the upper or rear surface of the base and may be electrically connected to the first piezoelectric portion 1251a and the second piezoelectric portion 1252a in some areas.

For example, in the second substrate portion 1270, the first sub substrate portion 1271 may be electrically connected to the first piezoelectric portion 1251a. In addition, the first sub substrate 1271 may be seated in a first base groove to be described later.

Also, the second sub-substrate portion 1272 may be electrically connected to the second piezoelectric portion 1252a. In addition, the second sub substrate 1272 may be seated in a second base groove to be described later.

The first sub substrate 1271 may be inclined at a predetermined angle (eg, 90 degrees or less) with respect to the horizontal direction (Y-axis direction). In addition, the second sub-substrate unit 1272 may be inclined at a predetermined angle (eg, 90 degrees or less) with respect to the horizontal direction (Y-axis direction).

Furthermore, the first sub-sub-substrate 1271 and the second sub-substrate 1272 may be disposed to face each other diagonally with respect to the optical axis of the lens assembly described above. For example, if the first sub-sub-substrate 1271 is rotated in the first direction (X-axis direction) and then rotated in the horizontal direction (Y-axis direction), it may correspond to the second sub-substrate 1272 .

Furthermore, the first sub-substrate unit 1271 includes the first electrode units EP1aa and EP1ab connected to the first piezoelectric element layer and the second piezoelectric element layer of the first piezoelectric unit 1251a, and the second electrode unit EP1aa and EP1ab connected to the central layer. An electrode part EP1b may be included. The first sub-substrate portion 1271 may have a structure integrated with or separated from the central layer of the first piezoelectric portion 1251a.

In addition, the second sub-substrate unit 1272 includes the third electrode units EP2aa and EP2ab connected to the first and second piezoelectric element layers of the second piezoelectric unit 1252a, and the fourth connected to the central layer. An electrode part EP2b may be included. In addition, the second sub-substrate portion 1272 may have a structure integrated with or separated from the center layer of the second piezoelectric portion 1252a.

Furthermore, the second board unit 1270 may partially extend to the outside of the second camera actuator and may include a connector. Also, the second board unit 1270 may be electrically connected to a processor or controller of an electronic device through a connector.

For example, the second substrate part 1270 may be electrically connected to each layer of the first piezoelectric part or the second piezoelectric part.

31 is a rear view of a second camera actuator according to an embodiment, and FIG. 32 is a perspective view of the second camera actuator according to an embodiment.

Referring to Figures 31 and 32, the base 1210 may include base grooves (BG1, BG2) having an inclined bottom surface with respect to the horizontal direction (Y-axis direction) on the side.

The base groove may include a first base groove BG1 and a second base groove BG2. For example, the first base groove BG1 may be located on the outer surface of the second side wall 1214 . Also, a second base groove BG2 may be positioned on an outer surface of the first sidewall 1213 .

The first base groove BG1 and the second base groove BG2 may be symmetrically arranged in a first direction (X-axis direction) and a second direction (Y-axis direction). That is, the first base groove BG1 and the second base groove BG2 may be arranged diagonally with respect to the center (eg, optical axis) of each lens group. Similarly, the bottom surface of the first base groove BG1 and the bottom surface of the second base groove BG2 may also be positioned diagonally and symmetrically.

In an embodiment, at least a part of the second substrate unit may be seated in the base groove. As described above, the second sub substrate 1272 may be seated on the lower surface of the first base groove BG1. Also, the first sub substrate 1271 may be seated on the bottom surface of the second base groove BG2.

Also, the second substrate unit may be connected to the second driving unit. For example, the second substrate unit may be positioned in the first base groove and connected to the second driving unit (eg, the first lens driving unit). Also, the second substrate unit may be positioned in the second base groove and electrically connected to the second driving unit (eg, the second lens driving unit).

The first base groove BG1 and the second base groove BG2 may be inclined at predetermined angles (eg, 90 degrees or less) (θb, θc) with respect to the horizontal direction (Y-axis direction).

In addition, corresponding to the bottom surface of the first base groove BG1 and the bottom surface of the second base groove BG2, the first position magnet and the second position magnet may also be inclined at a predetermined angle with respect to the horizontal direction (Y-axis direction). have. For example, the bottom surface of the first base groove BG1 or the first location magnet may be inclined at a predetermined angle (eg, 30 degrees to 60 degrees) with respect to the horizontal direction (Y-axis direction).

In addition, the bottom surface of the second base groove BG2 or the second location magnet may be inclined at a predetermined angle (eg, 30 degrees to 60 degrees) with respect to the horizontal direction (Y-axis direction).

With this configuration, the length of the base 1210 in the first direction (X-axis direction) may not be affected by the second substrate portion, compared to a structure in which the second substrate portion is disposed above and below the base 1210. . Thus, the length of the second camera actuator may be reduced in the first direction (X-axis direction). That is, the compactness of the device can be achieved. Furthermore, the thickness of the camera module or electronic device including the second camera actuator may also be miniaturized.

33 is a perspective view of a mobile terminal to which a camera module according to an embodiment is applied;

Referring to FIG. 33 , the mobile terminal 1500 of the embodiment may include a camera module 1000, a flash module 1530, and an autofocus device 1510 provided on the rear side.

The camera module 1000 may include an image capturing function and an auto focus function. For example, the camera module 1000 may include an auto focus function using an image.

The camera module 1000 processes an image frame of a still image or a moving image obtained by an image sensor in a photographing mode or a video call mode.

The number of camera modules 1000 may be plural. For example, the camera module 1000 may include a first camera module 1000A and a second camera module 1000B. The first camera module 1000A and the second camera module 1000B may have different structures. For example, any one of the first camera module 1000A and the second camera module 1000B may be the same as the above-described camera device or camera module.

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

For example, the camera module 1000 may include the camera module described above. Also, the camera module 1000 may include a first camera module and a second camera module, and OIS may be implemented with an AF or zoom function by the first camera module.

The flash module 1530 may include a light emitting element emitting light therein. The flash module 1530 may be operated by camera operation of the mobile terminal or user's control.

The autofocus device 1510 may include one of the packages of a surface light emitting laser device as a light emitting unit.

The autofocus device 1510 may include an autofocus function using a laser. The autofocus device 1510 may be mainly used in a condition in which an autofocus function using an image of the camera module 1000 is degraded, for example, a proximity of 10 m or less or a dark environment.

The autofocus device 1510 may include a light emitting unit including a vertical cavity surface emitting laser (VCSEL) semiconductor device and a light receiving unit such as a photodiode that converts light energy into electrical energy.

34 is a perspective view of a vehicle to which a camera module according to an embodiment is applied.

For example, FIG. 34 is an external view of a vehicle equipped with a vehicle driving assistance device to which the camera module 1000 according to the embodiment is applied.

Referring to FIG. 34 , a vehicle 700 according to the embodiment may include wheels 13FL and 13FR rotating by a power source and a predetermined sensor. The sensor may be the camera sensor 2000, but is not limited thereto.

The camera 2000 may be a camera sensor to which the camera module 1000 according to the embodiment is applied. The vehicle 700 of the embodiment may obtain image information through the camera sensor 2000 that captures a front image or a surrounding image, determines a lane unidentified situation using the image information, and generates a virtual lane when the lane is not identified. can do.

For example, the camera sensor 2000 may obtain a front image by capturing the front of the vehicle 700, and a processor (not shown) may obtain image information by analyzing an object included in the front image.

For example, when objects such as lanes, adjacent vehicles, driving obstacles, and indirect road markings such as median strips, curbs, and roadside trees are captured in an image captured by the camera sensor 2000, the processor detects these objects. and can be included in the image information. At this time, the processor may acquire distance information with the object detected through the camera sensor 2000 to further supplement the image information.

The image information may be information about an object photographed in an image. The camera sensor 2000 may include an image sensor and an image processing module.

The camera sensor 2000 may process a still image or moving image obtained by an image sensor (eg, CMOS or CCD).

The image processing module may process a still image or moving image acquired through an image sensor, extract necessary information, and transmit the extracted information to a processor.

In this case, the camera sensor 2000 may include a stereo camera to improve object measurement accuracy and further secure information such as a distance between the vehicle 700 and the object, but is not limited thereto.

Although the above has been described with reference to the embodiments, this is only an example and does not limit the present invention, and those skilled in the art to which the present invention belongs will not deviate from the essential characteristics of the present embodiment. It will be appreciated that various variations and applications are possible. For example, each component specifically shown in the embodiment can be modified and implemented. And differences related to these modifications and applications should be construed as being included in the scope of the present invention as defined in the appended claims.

Claims (27)

Base;
a first lens assembly and a second lens assembly sequentially arranged in the optical axis direction within the base; and
A driving unit for moving the first lens assembly or the second lens assembly; includes,
the driving unit,
a first lens driving unit including a first rod contacting the first lens assembly and a first piezoelectric unit connected to the first rod; and
The first lens assembly further includes a first elastic part connected to the first rod,
The first elastic part may include a first region in contact with the first lens assembly; and a first curvature area extending from the first area and having a curvature, and a second area extending from the first curvature area and facing the first area. According to claim 1,
The first rod is disposed between the first region and the second region. According to claim 1,
The first lens assembly includes a first lens groove camera actuator. According to claim 3,
The first region includes a first elastic groove,
The first elastic groove is a camera actuator located in the first lens groove. According to claim 1,
The second area includes a second elastic groove,
The second elastic groove is a camera actuator disposed to face the first elastic groove. According to claim 1,
A length of the first curvature region in the optical axis direction is smaller than a length of the first region or the second region in the optical axis direction. According to claim 1,
The first lens assembly includes a first side surface in contact with the first elastic part,
The camera actuator comprising: a first coupling protrusion protruding outward from the first side surface. According to claim 7,
The first coupling protrusion may include a base region overlapping the first curvature region in the optical axis direction; and an extension area extending to the second area. According to claim 8,
The camera actuator of claim 1 , wherein the extension area at least partially overlaps the second area in the optical axis direction. According to claim 1,
A camera actuator according to claim 1 , wherein a plurality of first coupling protrusions are spaced apart along the optical axis direction. According to claim 1,
The first curvature region is a camera actuator disposed between spaced apart first coupling protrusions. According to claim 1,
The camera actuator of claim 1 , wherein the first elastic part includes a third area extending from the second area to the first lens assembly. According to claim 1,
The driving unit includes a second lens driving unit including a second rod contacting the second lens assembly and a second piezoelectric unit connected to the second rod. According to claim 13,
The second lens assembly further includes a second elastic part connected to the second rod. According to claim 14,
The second elastic part may include a fourth region in contact with the second lens assembly; and a second curvature area extending from the fourth area and having a curvature, and a fifth area extending from the second curvature area and facing the fourth area. According to claim 15,
The second rod is disposed between the fourth region and the fifth region. According to claim 16,
The second lens assembly includes a second lens groove,
The fourth area includes a third elastic groove,
The third elastic groove is a camera actuator located in the second lens groove. According to claim 17,
The fifth region includes a fourth elastic groove,
The fourth elastic groove is a camera actuator disposed to face the third elastic groove. According to claim 15,
A length of the second curvature region in the optical axis direction is smaller than a length of the fourth region or the fifth region in the optical axis direction. According to claim 15,
The second lens assembly includes a second side surface in contact with the second elastic part,
The camera actuator comprising: a second coupling protrusion protruding outward from the second side surface. According to claim 13,
A length of the first rod in the optical axis direction is equal to or different from a length of the second rod in the optical axis direction. According to claim 1,
The first lens assembly includes a first magnet groove; and a first positioning magnet disposed in the first magnet groove,
The camera actuator of claim 1 , wherein the first magnet groove or the first positioning magnet is inclined at 90 degrees or less with respect to a horizontal direction. The method of claim 22,
Includes; a base surrounding the first lens assembly and the second lens assembly,
The side of the base camera actuator including a base groove having a bottom surface inclined with respect to the horizontal direction. According to claim 23,
A camera actuator comprising: a second substrate part, at least a part of which is seated in the base groove and connected to the driving part. According to claim 1,
Further comprising: a guide unit penetrating any one of the first lens assembly and the second lens assembly;
The guide part,
a first guide pin penetrating the first lens assembly; and
A camera actuator including a; second guide pin penetrating the second lens assembly. According to claim 25,
The first lens assembly includes a first pin holder surrounding at least a portion of the second guide pin,
The second lens assembly includes a second pin holder enclosing at least a portion of the first guide pin. According to claim 1,
a first lens group disposed in the first lens assembly;
a second lens group disposed within the second lens assembly;
a third lens assembly disposed in front of the first lens assembly and accommodating a third lens group; and
A fourth lens group disposed in the base at the rear end of the second lens group,
The first lens group and the fourth lens group are relatively fixed with respect to the second lens group and the third lens group.

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