WO2019109929A1

WO2019109929A1 - Optical assembly, image pickup module, and intelligent device provided with image pickup module

Info

Publication number: WO2019109929A1
Application number: PCT/CN2018/119287
Authority: WO
Inventors: 陈振宇; 涂洪德; 方银丽; 邱辉
Original assignee: 宁波舜宇光电信息有限公司
Priority date: 2017-12-08
Filing date: 2018-12-05
Publication date: 2019-06-13

Abstract

An optical assembly, an image pickup module provided with the optical assembly, and an intelligent device provided with the image pickup module. The optical assembly comprises a lens module (10), a fixing device (30), and SMA lines (40). The lens module (10) is provided with an outer frame (12). The fixing device (30) is disposed at a group of diagonal regions (12B) of the lens module (10). The outer frame (12) surrounding the lens module (10) is configured to form four side surfaces (1, 2, 3, 4) every two of which are opposite to each other. On each side surface (1, 2, 3, 4), the SMA lines (40) comprises a first SMA line and a second SMA line, and the first SMA line and the second SMA line are configured to intersect with each other but is not in contact with each other.

Description

Optical components, camera modules, and smart devices with camera modules

Cross-reference to related applications

The present application claims priority to the Chinese Patent Application No. 201711299061.2 and the Chinese Patent Application No. PCT Application No.

Technical field

The present application relates to an optical component, a camera module having the optical component, and a smart device having the camera module.

Background technique

The camera module on the existing smart device basically adopts the motor mechanism to drive the longitudinal movement of the lens to realize the auto focus, but the motor carrier needs a certain motion stroke to drive the lens for the longitudinal movement, so the longitudinal direction of the lens needs to be in the smart device. The movement leaves room for reservation. Taking a smart phone as an example, as the smart phone becomes thinner and thinner, the available space for the camera module in the mobile phone is getting smaller and smaller, and the motor carrier needs a certain driving force of the magnet driving coil to drive the lens to realize the longitudinal movement. Among them, the magnet occupies a large volume inside the motor, and for the thrust to reach a certain value, the volume of the magnet is hard to be reduced again. Therefore, it is necessary to improve the motor structure and reduce the motor without reducing the volume of the magnet. The volume, which in turn reduces the size of the camera module.

Shape memory alloy, Shape Memory Alloys, referred to as SMA. When the SMA wire is heated, it can eliminate the deformation at a lower temperature and restore its original shape before deformation, so that the SMA wire can be used instead of the motor to drive the lens for movement. Compared with the traditional motor, the SMA wire has a smaller volume, which can effectively reduce the overall size of the module and facilitate the miniaturization of the module.

Summary of the invention

The present application aims to propose a camera module and a smart device having the same, which are expected to have a small volume and can realize autofocus and optical image stabilization under the driving of the SMA wire.

According to an aspect of the present application, there is provided an optical component, comprising: a lens module having an outer frame; a fixing device disposed at a set of diagonal regions of the lens module; and an SMA wire surrounding The outer frame of the lens module is disposed to form two opposite sides, wherein on each side, the SMA wires each include a first SMA wire and a second SMA wire, and the first SMA wire and the second SMA wire are set to Cross each other but not touch.

In one embodiment, the optical assembly further includes a base disposed under the lens module for supporting the lens module and fixing the fixing device.

In one embodiment, on each side, the first SMA wire and the second SMA wire each have a fixed end and a movable end, the fixed end is on the fixing device, and the movable end supports another set of diagonal regions of the lens module. When the SMA wire is deformed, the movable end drives the lens module to move relative to the fixture.

In one embodiment, at least one of the first SMA wire and the second SMA wire is folded to have two fixed ends and one movable end, two of at least one of the first SMA wire and the second SMA wire The fixed end is disposed at a fixed and adjacent position relative to the base.

In one embodiment, the movable end of at least one of the first SMA wire and the second SMA wire is supported on an outer frame of the camera module.

In one embodiment, at least one of the first SMA wire and the second SMA wire is folded into two SMA wire segments, the two SMA wire segments being parallel to each other and having the same length.

In one embodiment, the SMA lines on adjacent sides of the outer frame are symmetrically disposed.

In one embodiment, on each side of the outer frame, the first SMA wire and the second SMA wire are arranged to be symmetrical to each other and have the same length.

In one embodiment, on each side of the outer frame, the active ends of the first SMA wire and the second SMA wire are at different distances from each side.

In one embodiment, on each side of the outer frame, the fixed ends of the first SMA wire and the second SMA wire are at different distances from each side.

In one embodiment, the lens module has a first support portion and a second support portion on each side of the outer frame, the first support portion and the second support portion supporting the first SMA wire and the second SMA wire, respectively.

In one embodiment, at least the first support portion of the first support portion and the second support portion is a winding portion, and the first SMA wire is wound around the winding portion.

In one embodiment, the winding portion is disposed perpendicular to the optical axis of the lens module and has a winding structure parallel to the optical axis such that the first SMA wire is wound on the winding structure parallel to the optical axis.

In one embodiment, the winding portion is disposed parallel to the optical axis of the lens module and has a winding structure perpendicular to the optical axis such that the first SMA wire is wound on the winding structure perpendicular to the optical axis.

In one embodiment, the winding portion has a T-shaped or work-shaped winding structure, and the first SMA wire is wound around the T-shaped or work-shaped winding structure of the winding portion.

In one embodiment, at least the first support portion of the first support portion and the second support portion is a movable end fixing portion, and the first SMA wire is fixed to the movable end fixing portion.

In one embodiment, the first SMA wire comprises two separate SMA wire segments, the interior of the movable end fixing portion further comprising a conductive element disposed between the two separate SMA wire segments.

According to another aspect of the present application, there is provided a camera module comprising the optical component of any of the above embodiments.

According to still another aspect of the present application, a smart device is provided, including the camera module of any of the above embodiments.

According to the optical component, the camera module and the smart device provided by the present application, the invention has a small volume and can easily realize autofocus and optical image stabilization.

DRAWINGS

Exemplary embodiments are shown with reference to the drawings. The embodiments and the figures disclosed herein are to be considered as illustrative and not restrictive.

1A shows a perspective view of an optical assembly in accordance with an exemplary embodiment of the present application when an SMA wire is provided;

FIG. 1B illustrates a perspective view of an optical assembly in accordance with another exemplary embodiment of the present application when an SMA wire is provided; FIG.

Figure 2 is a partial enlarged view of the fixing device in the embodiment shown in Figure 1A;

3A is a schematic view showing a winding portion in the embodiment shown in FIG. 1A;

3B is a schematic view showing a winding portion in the embodiment shown in FIG. 1B;

4A shows a schematic view of a winding shape in accordance with an exemplary embodiment of the present application;

4B shows a schematic view of a winding shape according to another exemplary embodiment of the present application;

FIG. 5 illustrates a top view of an optical assembly in accordance with an exemplary embodiment of the present application when an SMA wire is provided; FIG.

6A illustrates a perspective view of an optical assembly in accordance with yet another exemplary embodiment of the present application when an SMA wire is provided;

Figure 6B is a partial enlarged view of the movable end fixing member of the embodiment shown in Figure 6A;

6C is a schematic view showing the internal structure of the movable end fixing member in the embodiment shown in FIG. 6A;

FIG. 7 illustrates a perspective view of an optical assembly in accordance with still another exemplary embodiment of the present application when an SMA wire is provided; FIG.

FIG. 8 illustrates a perspective view of an optical assembly in accordance with still another exemplary embodiment of the present application when an SMA wire is provided; FIG.

9A illustrates a perspective view of an optical assembly in accordance with still another exemplary embodiment of the present application when an SMA wire is provided;

Figure 9B shows a side view of one side according to the embodiment shown in Figure 9A;

Fig. 10 schematically shows a perspective view of an optical component according to an embodiment of the present application when an SMA wire is wound.

Detailed ways

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It is understood that the detailed description is only illustrative of the exemplary embodiments of the application, and is not intended to limit the scope of the application. Throughout the specification, the same drawing reference numerals refer to the same elements. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that in the present specification, the expressions of the first, second, etc. are used to distinguish one feature from another, and do not represent any limitation of the feature. Thus, the first subject discussed below may also be referred to as a second subject, without departing from the teachings of the present application.

In the drawings, the thickness, size, and shape of the object have been somewhat exaggerated for convenience of explanation. The drawings are only examples and are not to scale.

It is also to be understood that the terms "comprises", "including", "having", "includes", and "includes", when used in the specification, means that there are the stated features, integers, steps, and operations. The elements, components, and/or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, components, components and/or combinations thereof. Moreover, when an expression such as "at least one of" appears after the list of listed features, the entire listed features are modified instead of the individual elements in the list. Further, when describing an embodiment of the present application, "may" is used to mean "one or more embodiments of the present application." Also, the term "exemplary" is intended to mean an example or an illustration.

As used herein, the terms "substantially", "about", and the like are used as terms of a table approximation, and are not intended to be used as a list of terms, and are intended to illustrate measurement that will be recognized by those of ordinary skill in the art. The inherent deviation in the value or calculated value.

All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having meaning consistent with their meaning in the context of the related art, and will not be interpreted in an idealized or overly formal sense unless This is clearly defined in this article.

It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings.

FIG. 1A illustrates a perspective view of an optical assembly in accordance with an exemplary embodiment of the present application when an SMA wire is provided.

As shown in FIG. 1A, an optical assembly according to an exemplary embodiment of the present application includes a lens module 10, a base 20, and a fixture 30. The SMA wire 40 is also mounted to the optical assembly before the optical assembly is assembled to the smart device.

The lens module 10 includes a lens 11 and a rectangular outer frame 12 that surrounds the lens 11. The rectangular outer frame 12 has four sides. In the perspective view shown in Fig. 1A, the structural arrangement of the two sides of the outer frame 12 can be seen. It should be understood that similar structural arrangements are also present on the other two sides of the outer frame 12, not shown in Figure 1A.

Each side surface of the outer frame 12 includes two winding portions, that is, a first winding portion 13 and a second winding portion 14, and the first winding portion 13 and the second winding portion 14 of each side surface are both Located in a set of diagonal regions 12A of the outer frame 12. The first winding portion 13 and the second winding portion 14 may be integrally formed on the outer frame 12 of the lens module 10.

The base 20 is disposed below the lens module 10 for supporting the lens module 10. The lens module 10 is disposed substantially centrally on the base 20. When driven, the lens module 10 is movable along the optical axis of the lens 11 under the support of the base 20 and in a plane perpendicular to the optical axis. Hereinafter, the driving and driving movement thereof will be described in detail in connection with the structure of the optical component of the present application.

The fixture 30 is disposed in another set of diagonal regions 12B of the outer frame 12 of the lens module 10. The fixture 30 is fixed to the base 20. As shown, the fixing device 30 has fixing faces respectively corresponding to each side of the outer frame 12, that is, the fixing device 30 has four fixing faces respectively corresponding to the four side faces of the outer frame 12. There are two fixed faces at each diagonal region 12B. Although the figure shows that the two fixing faces located at each of the diagonal regions 12B are integrally formed in an L shape, alternatively, the two fixing faces located at each of the diagonal regions 12B may be completely separated or partially Detached.

The fixing device 30 includes a first power fixing end 31, a ground fixing end 32, and a second power fixing end 33 on a fixing surface corresponding to each side of the outer frame 12, respectively. The first power source fixing portion 311 corresponding to the first winding portion 13 is disposed on the first power source fixing end 31, and the second power source fixing portion 331 corresponding to the second winding portion 14 is disposed on the second power source fixing end 33. The first ground wire fixing portion 321 corresponding to the first winding portion 13 and the second ground wire fixing portion 322 corresponding to the second winding portion 14 are both provided on the ground wire fixing end 32. The fixing device 30 including the first power fixing end 31, the ground fixing end 22, and the second power fixing end 33 is fixed to the base 20, and the first power fixing end 31, the ground fixing end 22 and the second power fixing end 33 are Each of them has an electrical connection with the base 20. The first power fixed end 31, the ground fixed end 32, and the second power fixed end 33 are spaced apart from each other to form electrical isolation therebetween, and the first power fixed end 31 and the second power fixed end 33 are respectively powered . The power fixing portion and the ground fixing portion described above may be a fixed point on the fixed end of the power source and the fixed end of the ground wire or a fixing member at a fixed point.

It should be understood that although the first ground wire fixing portion 321 corresponding to the first winding portion 13 and the second ground wire fixing portion 322 corresponding to the second winding portion 14 are all disposed at the same ground line in FIG. 1A Fixed end 32, but both can also be placed on different ground fixed ends.

2 is a partial enlarged view of the fixing device 30 in the embodiment shown in FIG. 1A, which corresponds to a fixed surface of the fixing device 30. As can be seen from FIG. 2, the ground fixed end 32 is located between the first power fixed end 31 and the second power fixed end 33, so that the first ground fixing portion 321 corresponding to the first winding portion 13 and The second ground wire fixing portions 322 corresponding to the two winding portions 14 may be sharedly disposed on the same ground wire fixing end 32. The first power source fixed end 31, the ground wire fixed end 32, and the second power source fixed end 33 are separated from each other by a certain distance to ensure electrical isolation from each other. As described above, the fixing device 30 may also include two ground fixing ends on which the first ground fixing portion 321 corresponding to the first winding portion 13 and the second corresponding to the second winding portion 14 are respectively disposed Ground wire fixing portion 322. It should be understood that the power supply fixed end and the ground fixed end may also be arranged and provided in other ways than illustrated.

Also shown in FIGS. 1A and 2 is an SMA wire 40 disposed on the outside of the lens module 10 and the fixture 30. In the illustrated embodiment, each SMA wire 40 has two fixed ends and one movable end. The two fixed ends of each SMA wire 40 (at both ends) are respectively fixed to a set of power fixing portions and a ground fixing portion, and one movable end (at the intermediate portion) is wound around the corresponding power fixing portion and The winding portion of the ground wire fixing portion.

The first winding portion 13, the first power fixing portion 311, and the first ground fixing portion 321 are disposed such that the two ends are respectively fixed to the first power fixing portion 311 and the first ground fixing portion 321, and the movable end is disposed. The two line segments formed on the first winding portion 13 after the winding of the SMA wire 40 are substantially parallel. The first winding portion 13 has positions at which they are respectively in contact with two substantially parallel SMA line segments, which are referred to as a first winding position and a second winding position, respectively. That is, the first wire between the first winding position on the first winding portion 13 and the fixed position on the first power fixing portion 311 and the second winding position on the first winding portion 13 and The second lines between the fixed positions on the ground fixing portion 321 are parallel to each other. The second winding portion 14, the second power fixing portion 331 and the second ground fixing portion 322 are disposed such that the two ends are respectively fixed to the second power fixing portion 331 and the second ground fixing portion 322, and the movable end winding The two line segments formed on the second winding portion 14 after the winding of the SMA wire 40 are substantially parallel; that is, the third winding position on the second winding portion 14 and the fixing on the second power supply fixing portion 331 The third line between the positions and the second line between the fourth winding position on the second winding portion 14 and the fixed position on the second ground fixing portion 322 are parallel to each other. The winding portion and the fixing portion are further disposed such that the first and second connecting lines that are parallel to each other intersect with the third and fourth connecting lines that are parallel to each other but are not in contact with each other, thereby being fixed and wound around The two SMA wires of the two sets of winding portions and the fixing portion are formed to intersect but not in contact with each other.

For example, on each side of the outer frame 12, the first winding position and the second winding position of the first winding portion 13 are the same or approximately the same as the distance from the corresponding side of the outer frame 12. The third winding position and the fourth winding position of the second winding portion 14 are also the same or approximately the same as the distance from the corresponding side surface of the outer frame 12. a distance between the first winding position and the second winding position of the first winding portion 13 and the corresponding side surface of the outer frame 12 and a third winding position and a fourth winding position of the second winding portion 14 and the outer frame The distance of the corresponding side of 12 is different.

Further, for example, on each of the fixing faces of the fixing device 30, the fixed position on the first power source fixing portion 311 and the fixed position on the first ground wire fixing portion 321 are the same or approximately the same distance from the fixing surface. The fixed position on the second power source fixing portion 331 and the fixed position on the second ground wire fixing portion 322 are the same or approximately the same distance from the fixed surface. The fixed position on the first power source fixing portion 311 and the fixed position on the first ground wire fixing portion 321 are spaced apart from the fixed surface and the fixed position on the second power source fixing portion 331 and the second ground wire fixing portion 322 The fixed position on the upper surface is different from the fixed surface.

The winding position and/or the fixing position are set to be different from the side surface or the fixing surface by a distance such that the two SMA wires fixed and wound around the two sets of the winding portion and the fixing portion are formed to intersect but not in contact with each other. In the case where the two SMA wires fixed and wound around the two sets of the winding portion and the fixed portion are formed to intersect but not in contact with each other, the lens 11 can be moved along the optical axis in the case where different SMA wires are driven by the power supply, And moving in a plane perpendicular to the optical axis.

In the embodiment shown in FIG. 1A, the first winding portion 13 and the second winding portion 14 are disposed perpendicular to the optical axis of the lens 11, and have a winding structure parallel to the optical axis. Alternatively, the winding portion itself may not be perpendicular to the optical axis, but the plane formed by the first connecting line and the second connecting line after winding may be parallel to the optical axis, that is, the first winding described later. The structure 131 and the second winding structure 141 are perpendicular to the optical axis.

It should be understood that although the outer frame 12 shown in the drawings is rectangular, the outer frame may be any suitable shape other than a rectangle as long as the position and structure of the winding portion and the fixing portion are set such that the SMA wire It can be formed to be wound in a quadrangular shape (preferably, a rectangular shape), and the four sides of the quadrilateral respectively correspond to the side faces of the outer frame in four directions, and thereby the lens module can be driven to move in the manner described below. For example, the outer frame may also be curved, the curved outer surface is provided with a winder, and the winder can form a quadrilateral, preferably rectangular, with the power fixed end and the ground fixed end provided at the fixing device; for example, the fixing device can It is a circular arc type. The fixed end of the power supply and the fixed end of the ground wire are arranged on the outer surface of the circular arc, and the shape and size of the fixed end of the power supply and the fixed end of the ground wire are correspondingly changed, so that a rectangular-like quadrangular shape can be formed together with the winder.

In fact, the outer frame of the lens module may have four sides divided by an angular range, and the winding portion and the corresponding fixing portion on each side may be provided to be capable of forming the above-described quadrilateral. The four sides divided by the angular range should be understood to mean that the center position of the outer frame is divided into four quadrants by the center point (center), and the angular range of each quadrant corresponds to one side. For example, for a rectangular outer frame, the four sides thus divided correspond to the four sides of the rectangle; for the outer frame of the circle, the four sides thus divided correspond to the four-segment quarter arc. That is to say, the outer frame of the lens module may be of any shape as long as the winding portion provided on each side divided by the angle and the corresponding fixing portion on the fixing device cooperate to form a desired quadrilateral structure.

It should also be understood that the base in the above embodiments is also not essential to the optical assembly of the present application. For example, the bottom of the fixture may extend laterally out of a support to replace the base.

FIG. 3A shows a schematic view of the winding portion in the embodiment shown in FIG. 1A. As shown in Fig. 3A, the first winding portion 13 and the second winding portion 14 extend perpendicularly from the side surface of the outer frame 12, thereby being perpendicular to the optical axis of the lens 11. On the first winding portion 13 and the second winding portion 14, a first winding structure 131 and a second winding structure 141 which are parallel to the optical axis are respectively provided. For example, the first winding structure 131 and the second winding structure 141 are groove structures respectively provided on the first winding portion 13 and the second winding portion 14 for winding the SMA wire. As shown, the first winding structure 131 and the second winding structure 141 are respectively disposed at different distances from the side surface of the outer frame 12, whereby the fixing portion on the fixing device 30 is disposed at the same distance from the fixed surface. At this time, the two SMA wires 40 fixed and wound as described above are not in contact with each other. The first winding portion 13 and the second winding portion 14 shown in FIG. 3A have substantially the same length, and the first winding structure 131 and the second winding structure 141 are formed at a distance from the first winding portion 13 and Different positions of the head or distal end of the second winding portion 14. It should be understood that the structure of the winding portion is not limited thereto, and for example, the first winding portion 13 and the second winding portion 14 having different lengths may be used, and the first winding structure 131 and the second winding structure 141 are respectively formed at At the same position from the head or the distal end portion of the first winding portion and the second winding portion, as long as the first winding structure and the second winding structure are respectively formed at different distances from the side of the outer frame 12, can. In different embodiments, the first winding structure 131 and the second winding structure 141 may also be formed at the same distance from the side surface of the outer frame 12, and the corresponding fixing portions on the fixing device are formed on the corresponding fixing surface. Separated by different distances.

FIG. 1B illustrates a perspective view of an optical assembly in accordance with another exemplary embodiment of the present application when an SMA wire is provided. The main difference of the embodiment shown in Fig. 1B is the structure of the winding portion as compared with the embodiment shown in Fig. 1A. The first winding portion 15 and the second winding portion 16 in Fig. 1B have a structure similar to an L shape, the body having the winding structure being disposed parallel to the optical axis of the lens 11, and having a winding perpendicular to the optical

axis Line structures

151 and 161.

In the above embodiment, in order to facilitate the installation of the SMA wire, the heights of the power supply fixing end and the corresponding ground wire fixing end may be set to be different from each other, that is, the fixed position on the first power source fixing portion and the first ground wire fixing portion. The fixed position is different from the corresponding side of the outer frame, and the fixed position on the second power fixing portion and the fixed position on the second ground fixing portion are different from the corresponding side of the outer frame. At this time, the overall height of the fixed end of the power supply and the fixed end of the ground wire may be different, or the fixed positions on the fixed end of the power supply and the fixed end of the ground wire may be set at different heights.

It should be understood that the shape and structure of the winding portion itself may not be perpendicular or parallel to the optical axis as long as the winding structure thereon is parallel or perpendicular to the optical axis as described in the above embodiment. Further, the winding structure can be disposed at an angle with the optical axis according to actual needs, and the presence of the angle makes the SMA have higher consistency when contracting.

Fig. 3B shows a schematic view of the winding portion in the embodiment shown in Fig. 1B. As shown in FIG. 3B, the main bodies of the first winding portion 15 and the second winding portion 16 are parallel to the optical axis of the lens 11, and the first winding portion 15 and the second winding portion 16 have extensions from the main body thereof. The connecting structure of the side of the frame 12. Alternatively, the first winding portion 15 and the second winding portion 16 parallel to the optical axis may be coupled to the side of the outer frame 12 by an additional connector. On the side of the outer frame 12, a first winding structure 151 and a second winding structure 161 perpendicular to the optical axis are respectively disposed. As shown, the first winding structure 151 and the second winding structure 161 are respectively disposed at different distances from the side of the outer frame 12, whereby the fixing portion on the fixing device 30 is disposed at the same distance from the fixed surface. At this time, the two SMA wires 40 fixed and wound as described above are not in contact with each other. In various embodiments, the first winding structure and the second winding structure may also be formed at the same distance from the side of the outer frame 12, and the corresponding fixing portions on the fixing device are formed differently from the corresponding fixing surfaces. distance.

The winding structures shown in Figs. 3A and 3B are all of an I-shape, that is, a structure in which both ends are wider and the middle has a certain recessed distance with respect to both ends. The recess formed by the recessed distance serves to accommodate the SMA wire and restricts the SMA wire from undesired movement during driving. Alternatively, a T-shaped winding structure may be employed to prevent the SMA wire from falling off during driving. Further, a mushroom-like structure may be added to the winding structure for limiting the position of the SMA wire and preventing the SMA wire from falling off the winder. The structure may also be similar to screwing the screw hole. Or insert a positioning pin into the positioning hole. There is an annular gap between the screw hole and the screw, and the annular gap is used to install the SMA wire. Since the head of the screw is relatively large, the limit effect on the SMA wire is enhanced.

4A and 4B illustrate two winding shapes in accordance with an exemplary embodiment of the present application. Specifically, FIG. 4A shows a schematic view in which the SMA wire 40 is wound in a U-shaped structure, and FIG. 4B shows a schematic view in which the SMA wire is wound in an O/α-shaped structure.

In the illustrated embodiment, each SMA wire is formed into a U-shaped or O/α-shaped double-layered wire structure after winding, and the double-layered wire structure has a better structure than the existing single-wire structure. Strength, higher stability, smaller posture difference, and higher focusing accuracy. The structural strength of the SMA wire is enhanced by a double-layered wire structure, and the SMA wire can carry a heavier lens, such as a glass lens, or a lens with more lenses than the current lens, further improving the quality of the entire module. .

FIG. 5 illustrates a top view of an optical assembly in accordance with an exemplary embodiment of the present application when an SMA wire is provided. Next, the movement of the optical component according to the present application in various directions by the SMA wire will be described with reference to FIG.

As shown in Figure 5, the optical assembly according to the present application provides SMA wires on each side. Although not shown in FIG. 5, it should be understood from the above description that there are two SMA wires on each side that are crossed but not in contact with each other, instead of only one SMA wire. The winding

portions

13, 14 provided in the diagonal region 12A of the outer frame 12, and the fixing means 30 provided in the diagonal region 12B are shown in FIG. Although the winding portion shown in FIG. 5 is parallel to the optical axis, it should be understood that the winding portion may also be perpendicular to the optical axis. For convenience of description, the four sides of the outer frame of the optical component are numbered counterclockwise as shown in FIG. 5 as the first side 1, the second side 2, the third side 3, and the fourth side 4, respectively. Meanwhile, as shown in FIG. 5, the plane perpendicular to the optical axis is represented by a Cartesian coordinate system, and the x and y axes are shown in FIG. Based on the coordinate system shown in FIG. 5, the direction perpendicular to the xy plane can be regarded as the z-axis, the direction perpendicular to the plane upward is the z+ direction, and the direction perpendicular to the plane downward is the z-direction.

As shown in Fig. 5, the four sides are divided into two groups, and the opposite two sides are a group. Specifically, the first side 1 and the third side 3 are a group for controlling the movement of the lens 11 in the x direction. The second side 2 and the fourth side 4 are a group for controlling the movement of the lens 11 in the y direction.

As described above, in the camera module of the present application, the fixing device 30 is fixed to the base 20, and therefore, the fixing device 30 and the fixing portion thereon remain in position during the movement of the lens 11. When it is required to drive the lens to move in the x+ direction, current is applied to the two SMA wires of the third side, and the SMA wire of the third side is raised by a predetermined amount of temperature after being energized, thereby contracting by a predetermined amount. Since both ends of the SMA wire are fixed to the fixture 30, the positions of both ends of the SMA wire remain unchanged. When the lengths of the two SMA wires are contracted, a force in the x+ direction is applied to the winding portion by the movable end of the winding portion, and the lens 11 is moved by a predetermined distance in the x+ direction. When the SMA line on the third side exerts a force in the x+ direction and causes the lens to move in the x+ direction, the SMA line of the first side is stretched as the lens module moves in the x+ direction. After the lens module reaches the desired position and remains stable, the SMA wire of the third side is cooled, so that the lens module is stably maintained at the desired position and the corresponding focus or zoom function is achieved.

Similarly, when it is required to drive the lens module to move in the x-direction, a current is applied to the SMA wire of the first side to contract the SMA wire of the first side to drive the lens to move in the x-direction. At this time, the SMA wire of the third side is stretched as the lens module moves in the x-direction.

When it is required to drive the lens to move in the y+ direction, a current is applied to the two SMA wires of the fourth side, and the SMA wire of the fourth side is raised by a predetermined amount of temperature after being energized, thereby contracting by a predetermined amount. Since both ends of the SMA wire are fixed to the fixture 30, the positions of both ends of the SMA wire remain unchanged. When the lengths of the two SMA wires are contracted, a force in the y+ direction is commonly applied to the winding portion around the movable end of the winding portion, and the lens 11 is moved in the y+ direction by a predetermined distance. When the SMA line of the fourth side exerts a force in the y+ direction and drives the lens to move in the y+ direction, the SMA line of the second side is stretched as the lens module moves in the y+ direction. After the lens module reaches the desired position and remains stable, the SMA wire of the fourth side is cooled, so that the lens module is stably maintained at the desired position and the corresponding focus or zoom function is achieved.

Similarly, when it is required to drive the lens module to move in the y-direction, a current is applied to the SMA wire of the second side to contract the SMA wire of the second side to drive the lens to move in the y-direction. At this time, the SMA wire of the fourth side is stretched as the lens module moves in the y-direction.

It should be understood that although not shown in FIG. 5, the edge of the lens module supported on the base is at a proper distance from the fixing device, so that the lens module can be moved in the x and y directions by an appropriate distance under the driving of the SMA wire, thereby realizing Optical anti-shake function.

In order to keep the lens module in the axial direction of the optical axis while moving in the x direction and the y direction, the two SMA wires of each side may be disposed to be substantially symmetrical with respect to the intersection positions of the two, thereby being applied substantially In the case of the same current, the force applied to the winding portion is also substantially the same, whereby the axial component of the force applied by the two is substantially offset.

It has been described above that the winding portion and the fixing portion are disposed such that the two SMA wires of each side cross but do not contact. That is, one of the two SMA wires on each side corresponds to the upper fixed portion and the lower winding portion, and the other corresponds to the lower fixed portion and the upper winding portion. Thus, the intersection relationship of the two SMA wires is formed.

When it is required to drive the lens to move in the z+ direction, an SMA wire on the fixed portion of the two SMA wires on each side is applied with current. That is, a total of four fixed portions of the SMA wire are applied with current, and the energized SMA wire is heated and thereby contracted by a predetermined amount of length. When the lengths of the four SMA wires are contracted, the movable end that is wound around the winding portion collectively applies a force in the z+ direction to the winding portion, and the lens 11 is moved by a predetermined distance in the z+ direction. After the lens module reaches the desired position and remains stable, the SMA wire of the fourth side is cooled, so that the lens module is stably maintained at the desired position and the corresponding focus or zoom function is achieved.

Similarly, when it is required to drive the lens module to move in the z-direction, a current is applied to one of the SMA wires of the fixed portion of the two SMA wires on each side, so that the energized SMA wire contracts to jointly drive the lens to the z- Move in direction. Thereby, the autofocus function of the lens can be achieved.

In order to keep the position of the lens module in the x direction and the y direction while moving in the z direction, the SMA lines of the adjacent sides may be arranged to be substantially symmetrical with respect to the boundary line of the adjacent sides, so that substantially the same current is applied. In the case, the force applied to the winding portion is substantially canceled by the components in the x direction and the y direction.

FIG. 6A illustrates a perspective view of a camera module in accordance with still another exemplary embodiment of the present application when an SMA wire is provided. The difference from the embodiment shown in FIG. 1A is that a movable end fixing portion is provided on the outer frame 12 of the lens module 10 instead of the winding portion. As shown in FIG. 6A, on the outer frame of the lens module 10, a first movable end fixing portion 17 and a second movable end fixing portion 18 are provided to clamp and fix the U-shaped structure of the SMA wire, thereby avoiding The SMA wire rubs against the winder as the lens moves.

Fig. 6B is a partial enlarged view of the movable end fixing member in the embodiment shown in Fig. 6A; Fig. 6C is a view showing the internal structure of the movable end fixing member in the embodiment shown in Fig. 6A.

In the case where the movable end fixing portion is used instead of the winding portion, each of the two parallel SMA line segments formed corresponding to the U-shaped winding structure is fixed to the movable end fixing portion at at least one point near the winding structure. . In this case, the first winding position and the second winding position of the winding portion described above may be the first fixed position and the second fixed position of the movable end fixing portion.

At this time, since the deformation of the SMA wire fixed by the movable end fixing portion is not directly or positively affected by the movement of the lens, the SMA wire may alternatively be a split structure at the U-shaped structure, that is, The part of the SMA wire fixed by the fixed end of the movable end can be removed. In fact, such a structure is equivalent to dividing one SMA wire in the embodiment of FIGS. 1A to 4 into two SMA wires, and both SMA wires have one end connected to the movable end fixing portion and the other two SMA wires. One end is respectively connected to the power fixing portion and the ground fixing portion corresponding to the movable end fixing portion.

In this case, the two SMA wires are connected between the two ends of the movable end fixing portion to be electrically connected by a common conductive element. Since the resistance of the ordinary conductive element is smaller than the resistance of the SMA wire, the ordinary conductive element is passed. The electrical connection can reduce the voltage divided by the SMA wire fixed at the fixed end of the movable end, reduce the power loss, and improve the power utilization.

In this embodiment, it is equivalent that both the first SMA wire and the second SMA wire are two wires, and both ends of the first SMA wire are respectively fixed to the movable end and the fixed end, and the second SMA wire is also the same.

In one embodiment, the two SMA wires can be installed simultaneously and a slightly larger length is reserved. At the fixed end of the movable end, the required line length can be intercepted according to actual needs. The position of the movable end fixing portion in contact with the SMA wire may be a metal structure capable of being electrically conductive, so that the wire sandwiched inside the movable end fixing portion can be directly short-circuited, and the current flows directly from the movable end fixing portion, thereby realizing two SMA wires. The electrical connection between them forms a loop that allows the SMA wire to function properly.

In the solution of fixing the U-shaped structure through the movable end fixing portion shown in FIG. 6A, the two SMA wires fixed to the same movable end fixing portion may be separated from each other by a distance of about one wire diameter, so that two The SMA wire is better able to move in sync. Alternatively, the two SMA wires fixed to the same movable end fixing portion may also be spaced apart from each other by a greater distance so as not to contact each other to avoid friction between each other.

As shown in FIG. 6A, the two movable end fixing portions on the same side have different sizes such that the movable end fixing position on one movable end fixing portion is spaced apart from the side surface and the movable end on the other movable end fixing portion. The fixed position is separated from the side by a different distance.

FIG. 7 illustrates a perspective view of a camera module in accordance with still another exemplary embodiment of the present application when an SMA wire is provided. Similar to the embodiment shown in Fig. 6A, in the embodiment of Fig. 7, a movable end fixing portion is also employed instead of the winding portion. In contrast to the embodiment of Fig. 6A, in the embodiment of Fig. 7, similar fixing members are also employed on the fixture 30. As shown in FIG. 7, the fixing device 30 no longer includes a power fixing end and a ground fixing end that are electrically isolated from each other, but a first fixing member 34 and a second fixing member 35 are provided on the fixing device. The first power source fixing portion 311 and the first ground wire fixing portion 312 are fixed to each other in the first fixing member 34 in electrical insulation. The second power source fixing portion 331 and the second ground wire fixing portion 322 are fixed to each other in the second fixing member 35 in electrical insulation. That is, both ends of each SMA wire whose movable end is fixed to the movable end fixing portion are fixed by the same insulating fixing member, and the distance between the ends of the wire fixed by the fixing member may be equal to or larger than the diameter of the wire, and the SMA wire The two ends are respectively led out and electrically connected to the circuit board instead of directly connecting to the circuit board through the fixed end. The SMA wire can be fixed to the fixing device by glue bonding between the SMA wire and the fixing device, or the electrical connection between the SMA wire and the circuit board can be realized through the conductive component by the built-in conductive component inside the fixing device, or through other The way is to realize the electrical connection between the SMA wire and the circuit board.

In the embodiment shown in Figure 7, the two SMA wires that intersect are of equal or approximately equal length to avoid mutual friction of the SMA wires during movement of the lens. When the fixed end is electrically connected directly to the wiring board through the SMA wire, the route in which the SMA wire located above the fixed end extends downward is not limited to the case shown in the drawing.

As an option, the two SMA wires that are crossed may also have different lengths. As shown in Figure 8, the two SMA wires that intersect may also have different lengths. In this case, the SMA wire drawn through the fixing member on the fixing device can directly extend downward and be electrically connected to the wiring board.

In the embodiment shown in FIG. 7 and FIG. 8, the SMA wire which is led out by the fixing member on the fixing device is connected to the circuit board. Since the SMA wire has heat shrinkage characteristics, the SMA wire needs to be reserved during installation. A certain length to prevent the line from breaking. Alternatively, the SMA wire can also terminate in a fixture and be electrically connected by conventional wire or insert molding.

Fig. 9A is a perspective view showing a camera module according to still another exemplary embodiment of the present application when an SMA wire is provided; and Fig. 9B is a side view showing a side view according to the embodiment shown in Fig. 9A.

The embodiment shown in FIGS. 9A and 9B differs from the embodiment shown in FIG. 1A in that the first winding portion and the second winding portion are formed by two portions on the same shaft member 19 parallel to the optical axis, forming The shaft members of the first winding portion and the second winding portion are disposed in a support member 191 that extends outward from a corresponding side surface of the outer frame. When the first winding portion and the second winding portion are formed in this manner, the shaft member 19 and the support member 191 can be integrally formed with the lens and the outer frame 12 of the camera module by an injection molding process, thereby simplifying the manufacturing process.

It should be understood that the winding portion and the movable end fixing portion in the above embodiment may also be implemented as other supporting members as long as the supporting action of the movable end of the SMA wire can be provided, and the lens is driven when the SMA wire is forced by the contraction. The module can move as the SMA wire shrinks.

In the case of using a support portion that has a supporting effect on the movable end of the SMA and that can be moved by the SMA when the SMA wire is contracted, the support position corresponds to the winding position in the embodiment described above. Therefore, in some embodiments, the first connection between the first support position on the first support portion and the fixed position on the first power supply fixing portion and the second support position on the first support portion and the first ground a second line between the fixed positions on the wire fixing portion is parallel to each other, and a third line between the third support position on the second support portion and a fixed position on the second power source fixing portion and the second support portion The fourth connecting position between the fourth supporting position and the fixed position on the second ground fixing portion is parallel to each other, and the first connecting line and the second connecting line parallel to each other are parallel to the third connecting line and the fourth connecting line Lines cross but not in contact with each other. In some embodiments, on each side of the outer frame, the first support location and the second support location are spaced apart from the corresponding sides of the outer frame by a distance different from the third support location and the fourth support location from the corresponding side of the outer frame the distance.

Fig. 10 schematically shows a perspective view of an optical component according to an embodiment of the present application when an SMA wire is wound. Specifically, FIG. 10 shows that two SMA wires 40 are respectively provided on the four sides of the outer frame 12, and the fixed ends of each of the SMA wires are fixed to the fixing device 30, and the movable ends are supported on the

support portions

13, 14.

In accordance with the structure described above and illustrated in the accompanying drawings, the present application also provides an embodiment of a camera module having SMA wires.

According to an embodiment, the camera module may include: a lens module having an outer frame, a base disposed under the lens module and supporting the lens module, and an SMA wire disposed in a quadrilateral shape surrounding the outer frame of the lens module, wherein the quadrilateral The four sides respectively correspond to the sides of the outer frame in four directions, and on each side of the outer frame, the SMA lines each include a first SMA line and a second SMA line, wherein the first SMA line and the second SMA line are set Cross each other but not in contact. In this embodiment, the structure and position of the fixing device and the support portion (including the winding portion and the movable end fixing portion) in the above embodiment may not be specifically limited, as long as the SMA disposed on the side of the outer frame of the lens module is present. The purpose of the present application is achieved by the quadrilateral being disposed around the outer frame of the lens module, and the two SMA wires on each side of the quadrilateral can cross each other but not in contact to enable the lens to be moved in a desired direction under different driving.

In one embodiment, the quadrilateral described above is rectangular.

In one embodiment, on each side of the outer frame, the first SMA wire and the second SMA wire each have a fixed end and a movable end, and the fixed end is disposed at a position corresponding to one end of each side of the outer frame, the movable The end is supported at the other end of each side of the outer frame. The fixed end is fixed relative to the base, and the movable end is fixed relative to the outer frame. When the SMA wire is deformed, the movable end drives the lens module to move relative to the base. The specific situation in which the SMA lines on the side of the outer frame of the lens module are respectively contracted and moved in different driving modes to achieve optical image stabilization and autofocus has been described in detail above, and thus the description will not be repeated here. All of the technical features in the various embodiments described above in connection with the figures are applicable to camera module embodiments having SMA lines without conflict.

For example, in one embodiment, at least one of the first SMA wire and the second SMA wire is folded to have two fixed ends and one movable end, at least one of the first SMA wire and the second SMA wire The two fixed ends are disposed in a fixed and adjacent position relative to the base. Thereby, the folded SMA wires at both ends are formed to be substantially parallel to each other.

In one embodiment, the movable end of at least one of the first SMA wire and the second SMA wire is supported on an outer frame of the lens module. As described above, the movable end may be supported on the outer frame of the lens module by winding or fixing, and the manner in which the movable end is supported on the outer frame is not limited to winding and fixing.

In one embodiment, at least one of the first SMA wire and the second SMA wire is folded into two SMA wire segments, the two SMA wire segments being parallel to each other and having the same length. In various embodiments, the two SMA segments can also have different lengths.

In one embodiment, the SMA lines on adjacent sides of the outer frame are symmetrically disposed such that the support or support on the outer frame is applied with substantially the same current applied to achieve optical image stabilization. The applied force is substantially offset by the components in the x and y directions. In one embodiment, on each side of the outer frame, the first SMA wire and the second SMA wire are disposed symmetrically to each other and have the same length so that substantially the same current is applied during focusing, The forces exerted by the bearings or supports on the frame are also substantially the same, whereby the axial component of the force applied by the two is substantially offset. In one embodiment, on each side of the outer frame, the first SMA wire and the second SMA wire are arranged to have at least a portion that is symmetrical to each other.

In one embodiment, on each side of the outer frame, the active ends of the first SMA wire and the second SMA wire are at different distances from each side. In one embodiment, on each side of the outer frame, the fixed ends of the first SMA wire and the second SMA wire are at different distances from each side. Thereby, it is ensured that the two SMA wires on each side surface do not rub against each other during the movement due to the contraction, thereby adversely affecting the position of the lens module.

In one embodiment, the winding portion is disposed perpendicular to the optical axis of the lens module and has a winding structure parallel to the optical axis such that the first SMA wire is wound on the winding structure parallel to the optical axis. In one embodiment, the winding portion is disposed parallel to the optical axis of the lens module and has a winding structure perpendicular to the optical axis such that the first SMA wire is wound on the winding structure perpendicular to the optical axis. In one embodiment, the winding portion has a T-shaped or work-shaped winding structure, and the first SMA wire is wound around the T-shaped or work-shaped winding structure of the winding portion.

In one embodiment, at least the first support portion of the first support portion and the second support portion is a movable end fixing portion, and the first SMA wire is fixed to the movable end fixing portion. In one embodiment, the first SMA wire comprises two separate SMA wire segments, the interior of the movable end fixing portion further comprising a conductive element disposed between the two separate SMA wire segments. Since the resistivity of a common conductive component is greater than the resistivity of the SMA, the SMA wire can divide more voltage and improve power utilization. In various embodiments, the first SMA wire may also include the entire SMA wire instead of the separate two SMA wire segments; in this case, no additional conductive elements need to be used in the movable end fixing portion.

It should be understood that the technical features described in any of the above embodiments may be used in whole or in part in other embodiments without conflict. For example, in the embodiment illustrated in FIG. 1A, one winding portion may be replaced with a movable end fixing portion, and the other winding portion may hold a winding portion of the winding portion or other structure shown in FIG. 1A.

The above description is only a preferred embodiment of the present application and a description of the principles of the applied technology. It should be understood by those skilled in the art that the scope of protection involved in the present application is not limited to the specific combination of the above technical features, and should also be covered by the above technical features or without departing from the concept of the present application. Other technical solutions formed by arbitrarily combining the equivalent features. For example, the above features are combined with the technical features disclosed in the present application, but are not limited to the technical features having similar functions.

Claims

An optical component, comprising:

a lens module having an outer frame; a fixture disposed in a set of diagonal regions of the lens module;

An SMA wire, the outer frame surrounding the lens module is disposed to form two opposite sides,

Wherein, on each side, the SMA wires each include a first SMA wire and a second SMA wire, the first SMA wire and the second SMA wire being disposed to cross each other but not in contact.
The optical assembly of claim 1 further comprising:

a base disposed under the lens module for supporting the lens module and fixing the fixing device.
The optical assembly of claim 1 wherein said first SMA wire and said second SMA wire each have a fixed end and a movable end on said each side, said fixed end being said On the fixing device, the movable end supports another set of diagonal regions of the lens module, and when the SMA wire is deformed, the movable end drives the lens module to move relative to the fixing device.
The optical assembly of claim 3 wherein at least one of said first SMA wire and said second SMA wire is folded to have two fixed ends and one movable end, said first The two fixed ends of the at least one of the SMA wire and the second SMA wire are disposed at fixed and adjacent positions relative to the base.
The optical component according to claim 4, wherein said movable end of said at least one of said first SMA wire and said second SMA wire is supported by said outer portion of said camera module On the frame.
The optical assembly according to claim 4, wherein said at least one of said first SMA wire and said second SMA wire is folded into two SMA wire segments, said two SMA wire segments being parallel to each other Have the same length.
The optical assembly of claim 1 wherein said SMA lines on adjacent sides of said outer frame are symmetrically disposed.
The optical assembly according to claim 1, wherein on each side of the outer frame, the first SMA wire and the second SMA wire are disposed to be symmetrical to each other and have the same length.
The optical assembly of claim 1 wherein, on each side of the outer frame, the movable ends of the first SMA wire and the second SMA wire are different from each of the sides distance.
The optical assembly according to claim 1, wherein a fixed end of said first SMA wire and said second SMA wire is different from said each side on each side of said outer frame distance.
The optical module according to claim 1, wherein said lens module has a first support portion and a second support portion on each side of said outer frame, said first support portion and said first The two support portions support the first SMA wire and the second SMA wire, respectively.
The optical module according to claim 11, wherein at least said first support portion of said first support portion and said second support portion is a winding portion, said first SMA wire being wound around Said on the winding part.
The optical component according to claim 12, wherein said winding portion is disposed perpendicular to an optical axis of said lens module and has a winding structure parallel to said optical axis such that said first SMA wire Winding on the winding structure parallel to the optical axis.
The optical component according to claim 12, wherein said winding portion is disposed parallel to an optical axis of said lens module and has a winding structure perpendicular to said optical axis such that said first SMA wire Winding on the winding structure perpendicular to the optical axis.
The optical component according to claim 12, wherein said winding portion has a T-shaped or work-shaped winding structure, and said first SMA wire is wound around said winding portion in a T shape or a work shape Winding structure.
The optical module according to claim 11, wherein at least said first support portion of said first support portion and said second support portion is a movable end fixing portion, and said first SMA wire is fixed at The movable end is fixed on the portion.
The optical assembly according to claim 16, wherein said first SMA wire comprises two separate SMA wire segments, said movable end fixing portion further comprising a conductive member, said conductive member being disposed on said two Segment separated between SMA segments.
A camera module comprising the optical component of any one of claims 1 to 17.
A smart device comprising the camera module of claim 18.