CN114500776B

CN114500776B - Image pickup module, lens assembly, driving motor thereof and electronic device

Info

Publication number: CN114500776B
Application number: CN202011161420.XA
Authority: CN
Inventors: 戎琦; 陈飞帆; 阙嘉耀; 陈卓
Original assignee: Ningbo Sunny Opotech Co Ltd
Current assignee: Ningbo Sunny Opotech Co Ltd
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2024-03-12
Anticipated expiration: 2040-10-27
Also published as: CN114500776A

Abstract

The application relates to a camera module, a lens assembly, a driving motor thereof and an electronic device. The driving motor comprises a fixed part, a movable part and a driving component, wherein the movable part comprises a bearing seat which is suitable for being fixedly connected with an optical lens of the lens assembly, and the driving component can drive the movable part to move relative to the fixed part. According to the invention, a movement guide is provided between the movable part and the fixed part, which movement guide is arranged in the lateral region of the carrier and is arranged in an asymmetrical manner such that the geometric center of the carrier is offset to one side with respect to the optical axis. Therefore, the lens assembly and the camera module can be arranged at the position of the electronic equipment display screen, which is closer to the edge or the corner, so that the utilization rate of the screen side is improved, and the larger screen occupation ratio is realized.

Description

Image pickup module, lens assembly, driving motor thereof and electronic device

Technical Field

The invention relates to the technical field of optical imaging, in particular to a driving motor suitable for a lens assembly of an imaging module, the lens assembly and the imaging module, and particularly comprises the driving motor. The invention also relates to electronic equipment comprising the camera module.

Background

With the popularization of mobile electronic devices, related technologies applied to camera modules (used for capturing images, such as video or images) of mobile electronic devices have been rapidly developed and greatly advanced, and in recent years, camera modules have been widely used in various fields such as medical treatment, security, industrial production, and the like. In order to meet market demands, at least one camera module is generally disposed on a portable terminal (e.g., a smart phone) body which is generally used due to development of mobile communication technology, and thus, a miniaturized and slim camera module has been developed. Meanwhile, the characteristics of high pixels, high frame rate and the like of the camera module are also irreversible development trend of the existing camera module.

In the consumer electronics field, for example in the field of smartphones, front-end camera modules are an indispensable component. The front camera module is usually arranged on the same side of the display screen and used for meeting the functions of self-timer and the like of a user. Nowadays, increasing the screen ratio and even realizing the full screen becomes an important development direction of electronic devices such as mobile phones, and this puts higher and higher demands on the arrangement of front cameras. For this reason, in the prior art, the following means are often considered: firstly, the size of the camera module is miniaturized, but on the premise of meeting the basic functional requirement and the structural strength requirement, the size reduction of the camera module at present tends to be limited; secondly, the local structure of the camera module is specially processed, such as a chamfer or a round angle is arranged so as to be suitable for the outline shape of the equipment, the camera module is arranged close to the corner, and the mode is still limited by the structural characteristics of the existing camera module and the components thereof; thirdly, a hidden front camera is adopted, but in the scheme, the design and manufacturing cost of equipment are improved due to the additional arrangement of a telescopic operating mechanism and the like, and new fault hidden danger is added.

Therefore, technological breakthroughs for the design of the camera module and its components are still expected in the market, and in particular, the position utilization rate of the electronic device (such as a smart phone) on the display screen side is allowed to be further improved, so that the larger screen occupation ratio, even the full screen, is facilitated.

Disclosure of Invention

The invention aims to optimize a camera module and a component design thereof, and provides a driving motor suitable for a camera module lens assembly, a camera module and electronic equipment comprising the camera module.

The basic idea of the invention comprises: in view of the fact that the structure and the size of the driving motor are main factors for restricting the further miniaturization of the lens assembly and the camera module, the design of the driving motor breaks through the traditional construction mode, and a brand new asymmetric scheme is adopted under the condition of guaranteeing basic function requirements and structural strength requirements of all parts, so that the lens assembly and the camera module (especially aiming at a front camera) are conveniently arranged at a position, closer to the edge or the corner, of a display screen of an electronic device (such as a smart phone), and the utilization rate of the screen side is improved, and the larger screen occupation ratio is facilitated.

According to a first aspect of the present invention, there is provided a drive motor adapted to a lens assembly of an image pickup module, comprising: the fixing part comprises a shell, a frame and a base; the movable part comprises at least one bearing seat which is suitable for being fixedly connected with an optical lens of the lens assembly; and a driving member capable of driving the movable portion to move relative to the fixed portion; wherein a movement guide is provided between the movable part and the fixed part, the at least one carrier is configured as a hollow element having a through-hole, the movement guide is provided at a side region of the hollow element and is arranged in an asymmetric manner such that a geometric center of the carrier is biased to one side with respect to a center of the through-hole, and the carrier has a widest side and a narrowest side defined based on a difference in width between a boundary of the through-hole and a peripheral boundary thereof.

According to a specific construction, the respective constituent elements of the movable portion and the driving member are accommodated in an internal space formed by a combination of the housing, the frame and the base, which have a hollow structure and an outline corresponding to the bearing seat, while a predetermined clearance is maintained between the housing, the frame and the base as the fixed portion and the bearing seat as the movable portion.

In a lens assembly of an image pickup module, a motor is used to drive an optical lens to move in an optical axis direction to implement A Focusing (AF) function and/or to drive the optical lens to move in a plane perpendicular to an optical axis to implement an anti-shake (OIS) function. In some embodiments, the driving motor is a ball motor, the motion guiding mechanism is a ball guiding mechanism comprising balls and ball tracks, the driving member comprises a coil arranged on the fixed part, and a magnet which is matched with the coil is arranged on the movable part. With the ball motor, focusing and/or optical anti-shake can be performed by a rolling operation, thereby reducing friction.

Thus, in some embodiments, the carrier comprises an AF carrier adapted to drive the optical lens to move along the optical axis, the AF carrier is a substantially rectangular hollow flat element, and has four parallel sides, wherein an AF ball guiding mechanism is disposed on only one side of the AF carrier.

It should be noted that the "rectangular" is not strictly limited to a regular right-angled parallelogram in the geometric sense, but rather, may be substantially shaped like a right-angled parallelogram, wherein one or more sides are configured to have a certain curvature and/or have a local convex or concave structure, and adjacent sides are not absolutely orthogonal or have a chamfer or rounded structure, and opposite sides are not absolutely parallel, without affecting implementation of the technical solution of the present invention.

In some embodiments, the carrier further comprises at least one OIS carrier adapted to move the optical lens in a plane perpendicular to the optical axis, the OIS carrier having a hollow structure and a contour corresponding to the AF carrier, the AF carrier and the OIS carrier being disposed inside and outside the AF carrier, wherein the OIS carrier is disposed inside the AF carrier.

In some embodiments, to achieve the driving operation, the ball motor has an FPCB plate fixedly disposed at a side of the frame, and the FPCB plate has one coil, i.e., an AF coil at one side and first and second OIS coils at two adjacent sides, respectively, on three sides of the frame.

According to one embodiment, one side of the AF carrier provided with the ball guide mechanism is fixedly provided with an AF magnet and corresponds to one side position of the frame provided with an AF coil; the two adjacent sides of the OIS carrier are fixedly provided with a first OIS magnet and a second OIS magnet and correspond to the two adjacent sides of the frame, which are provided with a first OIS coil and a second OIS coil.

Alternatively, according to another embodiment, one side of the AF carrier provided with the ball guide mechanism is fixedly provided with an AF magnet and corresponds to one side position of the frame provided with an AF coil; the OIS carrier comprises a first OIS carrier suitable for driving the optical lens to move along the X direction and a second OIS carrier suitable for driving the optical lens to move along the Y direction, wherein the optical axis direction of the optical lens is defined as the Z direction, the X direction, the Y direction and the Z direction respectively correspond to the X axis, the Y axis and the Z axis of a space rectangular coordinate system, one side edge of the first OIS carrier is fixedly provided with a first OIS magnet and corresponds to one side edge position of the frame, which is provided with a first OIS coil, and one side edge of the second OIS carrier is fixedly provided with a second OIS magnet and corresponds to one side edge position of the frame, which is provided with a second OIS coil.

Notably, the term "position correspondence" as referred to herein is to be understood as: the coil structure on the fixed part (i.e. the frame) side and the magnet structure on the movable part (i.e. the bearing seat/carrier) side are opposite to each other, so that when current is applied to the coil, a relative acting force is generated between the magnet and the coil to drive the movable part to move relative to the fixed part. This relates to the working principle of the drive motor/ball motor, which is well known to the person skilled in the art, and thus the technical meaning of the related definition of the expression can be clearly understood.

Here, the first OIS carrier is adapted to be disposed on an outer side of the optical lens and fixedly connected with the optical lens, the second OIS carrier is disposed on an outer side of the first OIS carrier, and the AF carrier is disposed on an outer side of the second OIS carrier and is located inside the frame.

Conveniently, a first OIS ball guide mechanism is provided between the first OIS carrier and the second OIS carrier, the first OIS ball guide mechanism having a first OIS ball track provided on the upper surface of the second OIS carrier, the first OIS ball track extending in the X direction for seating and guiding the first OIS balls; a second OIS ball guide mechanism is disposed between the second OIS carrier and the AF carrier, the second OIS ball guide mechanism having a second OIS ball track disposed on the upper surface of the AF carrier, the second OIS ball track extending in the Y-direction for seating and guiding a second OIS ball.

Advantageously, the AF ball guide mechanism provided at one side of the AF carrier has two AF ball tracks extending in the Z direction for seating and guiding AF balls, the two AF ball tracks being arranged at corner regions at both ends of the one side, and the AF magnet being arranged between the two AF ball tracks. Thus, while the structural arrangement is reasonable, it is possible to ensure that the movement of the lens in the optical axis direction is stably guided at the time of focusing operation.

Conveniently, the carrier has a generally rectangular outline, wherein one side provided with the AF ball guide mechanism and the AF magnets forms the widest side, and one side adjacent to the side and not provided with magnets forms the narrowest side, and the other two sides adjacent to each other and respectively provided with OIS magnets form the two narrowest sides. The corner areas formed on the narrowest side and the adjacent narrow side are provided with chamfers or rounds, so that the outline of the motor can be better adapted to the outline of electronic equipment (such as a smart phone or a tablet personal computer), and the corresponding lens assembly and the camera module are allowed to be arranged at positions closer to corners.

Advantageously, in some embodiments, three OIS ball tracks for seating and guiding OIS balls are provided on the respective carriers, the OIS ball tracks being arranged in three corner regions, respectively, which are not configured to be chamfered or rounded. Thus, based on the principle that one plane is determined by three points, it is possible to ensure that the lens is stably guided to move in a plane perpendicular to the optical axis at the time of the anti-shake operation.

According to a second aspect of the present invention, there is provided a lens assembly comprising: the optical lens consists of a lens barrel and at least one lens arranged in the lens barrel; and a drive motor as described above; the optical lens is accommodated in a lens mounting hole formed by a hollow structure of a driving motor, and the driving motor is eccentrically arranged corresponding to the bearing seat, namely, the geometric center of the driving motor is deviated to one side relative to the optical axis of the optical lens, and has a widest side and a narrowest side which are defined based on the difference of widths between the boundaries of the lens mounting hole and the peripheral boundary.

In some embodiments, the movable part of the driving motor and the lens barrel of the optical lens are fixedly connected with each other through a fastening structure, a thread structure or glue adhesion.

In some embodiments, the movable part of the driving motor can controllably drive the optical lens to move along the optical axis direction so as to realize a focusing function; and/or the movable part of the driving motor can controllably drive the optical lens to move in a plane perpendicular to the optical axis so as to realize the anti-shake function.

According to a third aspect of the present invention, there is provided an image pickup module including: a lens assembly as described above; the photosensitive assembly comprises a circuit board and a photosensitive chip attached to the circuit board; the outline of the camera module is at most protruded out of the outline of the driving motor at the widest side when the camera module is observed along the optical axis of the optical lens.

Typically, the lens assembly and the photosensitive assembly are positioned and fixed by an Active Alignment (aa=active Alignment) technique.

In some embodiments, the lens assembly is fixed on a lens base by the base of the driving motor and is further fixedly connected with the photosensitive assembly through the lens base.

In some embodiments, the lens assembly is secured to a lens mount integrally constructed with the circuit board of the photosensitive assembly by a mount of the drive motor.

The base of the drive motor can be fixed on the corresponding assembly surface of the lens base in an adhesive mode.

According to a fourth aspect of the invention, an electronic device is provided having a display screen and comprising an imaging module as described above, said imaging module being particularly suitable for constituting a front-facing camera arranged on the same side as the display screen. The camera module may be arranged in a top edge region or a corner region of the display screen.

Advantageously, the camera module is positioned with the narrowest side against the edge of the display screen and with the widest side away from the edge of the display screen. The position of the electronic device on the display screen side can be effectively utilized, and the screen occupation ratio can be as large as possible.

The electronic device may be a smart phone or a tablet computer.

It goes without saying that the features and advantages of the drive motor provided according to the first aspect of the present invention and the lens assembly and the image pickup module provided according to the second and third aspects of the present invention are equally applicable to the electronic apparatus provided according to the fourth aspect of the present invention.

Compared with the prior art, the invention breaks through the traditional construction mode in the design of the driving motor, correspondingly optimizes the construction design and the use performance of the lens assembly/camera module and corresponding electronic equipment, and particularly, the technical scheme provided by the application can realize at least one of the following beneficial technical effects:

(1) The motor structure is eccentrically arranged, the frame widths are different and asymmetric, the camera module can be arranged at a position, which is closer to the edge or the corner of the screen, of the camera module by matching with the camera module placement position and the terminal screen, so that the effective display area of the screen main body is increased, the higher screen occupation ratio is realized, the screen utilization rate is increased, and even the full screen is realized;

(2) In some embodiments, the motor bearing seat is provided with two or three carriers, and the lens can be driven to move on an x-y plane and along a z-axis direction by the two carriers, or respectively driven to move along three directions of the x, y and z-axes by the three carriers, so as to realize focusing (AF) and optical anti-shake (OIS);

(3) In some embodiments, a ball motor is used, OIS balls and corresponding OIS ball tracks are provided, and optical anti-shake is performed through a rolling operation, so that friction is reduced;

(4) In some embodiments, a ball motor is used, an AF ball and a corresponding AF ball track are provided, focusing is performed by a rolling operation, and friction is reduced.

Drawings

Some exemplary embodiments of the invention are shown in the drawings. The embodiments and figures disclosed herein are to be regarded as illustrative rather than restrictive. It is further noted that, for clarity of illustration, some of the details of construction in the drawings are not drawn to scale.

FIG. 1 is an exploded schematic view of the main constituent elements of a ball motor;

FIG. 2 is a schematic top view of the internal structure of the ball motor;

fig. 3A is a schematic top view of a second OIS carrier;

FIG. 3B is a schematic top view of an AF carrier;

FIG. 4 is a schematic diagram of a camera module;

FIGS. 5A and 5B are schematic diagrams of possible arrangements of camera modules on a display screen of an electronic device according to a first embodiment;

FIGS. 6A and 6B are schematic diagrams of possible arrangements of camera modules on a display screen of an electronic device according to a second embodiment;

fig. 7A and 7B are schematic diagrams of possible arrangements of camera modules on a display screen of an electronic device according to a third embodiment.

Detailed Description

The following description is presented to illustrate the invention and to enable those skilled in the art to practice the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention. It should also be noted that the features, structures, or characteristics described in connection with a particular embodiment are not necessarily limited to that particular embodiment, nor are they intended to be mutually exclusive with other embodiments, and that it is within the ability of one skilled in the art to implement different combinations of the features of the different embodiments.

The terms "first," "second," and the like in the description and in the claims, are used for distinguishing between different objects and not for describing a particular sequential order. Also, the terms "comprising," "including," and "having," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, article, or apparatus that comprises a list of steps or elements is not limited to only those listed but may optionally include additional steps or elements not listed or inherent to such process, method, article, or apparatus. In the description of the present application, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not mean that the corresponding device or element must have a specific orientation, be configured and operated in a specific orientation, and thus the above terms should not be construed as limiting the present invention. In addition, the terms "a" or "an" should be understood as "at least one" or "one or more", i.e., in a certain embodiment, the number of a certain element may be one, and in another embodiment, the number of the element may be plural, that is, the term "a" should not be construed as limiting the number.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art and are to be specifically interpreted according to their context in the context of the related art description.

The invention will be described in detail below with reference to the drawings in connection with embodiments.

Fig. 1 shows an exploded view of the main constituent elements of a drive motor (specifically, a ball motor) for a lens assembly of an image pickup module. Fig. 2 shows in a very simplified manner a schematic top view of the internal structure of a ball motor.

The invention provides a driving motor which is suitable for a lens assembly of an image pickup module. The drive motor includes: the fixing part comprises a shell, a frame and a base; the movable part comprises at least one bearing seat which is suitable for being fixedly connected with the optical lens of the lens assembly; and a driving member capable of driving the movable portion to move relative to the fixed portion. According to the invention, a movement guide is provided between the movable part and the fixed part, the at least one carrier being configured as a hollow element with a through-hole, the movement guide being provided in a lateral region of the hollow element and being arranged in an asymmetrical manner such that a geometric center O' of the carrier is offset to one side relative to a center O of the through-hole, the carrier having a widest side and a narrowest side defined on the basis of a difference in width between a boundary of the through-hole and a peripheral boundary thereof.

According to a specific construction, the respective constituent elements of the movable portion and the driving member are accommodated in an internal space formed by a combination of the housing 201, the frame 202 and the base, which have a hollow structure and an outline corresponding to the bearing seat (as shown in the figure), while a predetermined movable gap is maintained between the housing, the frame and the base as the fixed portion and the bearing seat as the movable portion.

In a lens assembly of an image pickup module, a motor is used to drive an optical lens to move in an optical axis direction to implement A Focusing (AF) function and/or to drive the optical lens to move in a plane perpendicular to an optical axis to implement an anti-shake (OIS) function. In some embodiments, the driving motor is a ball motor, the motion guiding mechanism is a ball guiding mechanism comprising balls and ball tracks, the driving member comprises a coil arranged on the fixed part, and a magnet which is matched with the coil is arranged on the movable part. With a ball motor, focusing and/or optical anti-shake can be performed by a rolling operation, thereby reducing friction.

The carrier comprises an AF carrier 30 adapted to move the optical lens in the optical axis direction, the AF carrier is a hollow flat element having a substantially rectangular shape, and has four parallel sides (corresponding to a, b, c, d in fig. 2, "a, b, c, d" is only used to indicate the orientation of each side, and is not specific to a specific element), wherein an AF ball guiding mechanism is provided on only one side a of the AF carrier 30.

In this embodiment, the carrier further includes at least one OIS carrier 10, 20 adapted to drive the optical lens to move in a plane perpendicular to the optical axis, the OIS carrier having a hollow structure and an outline corresponding to the AF carrier, the AF carrier and the OIS carrier being disposed inside and outside the AF carrier, wherein the OIS carrier is disposed inside the AF carrier.

To achieve the driving operation, the ball motor has an FPCB plate 203 fixedly provided at the side of the frame 202, and having one coil, namely, an AF coil 32 at one side a and first and second OIS coils 12 and 22 at two adjacent sides b and c, respectively, on three sides of the frame 202.

An AF magnet is fixedly arranged on one side edge of the AF carrier 3 provided with the ball guide mechanism and corresponds to one side edge position of the frame provided with the AF coil; the two adjacent sides of the OIS carrier are fixedly provided with a first OIS magnet and a second OIS magnet and correspond to the two adjacent sides of the frame, which are provided with a first OIS coil and a second OIS coil.

Alternatively, according to the embodiment shown in fig. 1 and 2, one side a of the AF carrier 30 provided with the ball guide mechanism is fixedly provided with the AF magnet 31 and corresponds to one side position of the frame 202 provided with the AF coil 32; the OIS carrier includes a first OIS carrier 10 adapted to drive an optical lens to move in an X direction and a second OIS carrier 20 adapted to drive an optical lens to move in a Y direction, wherein an optical axis direction of the optical lens is defined as a Z direction, and the X direction, the Y direction, and the Z direction correspond to X axis, Y axis, and Z axis of a rectangular space coordinate system, respectively, one side b of the first OIS carrier 10 is fixedly provided with a first OIS magnet 11 and corresponds to one side position of the frame 202 provided with a first OIS coil 12, and one side c of the second OIS carrier 20 is fixedly provided with a second OIS magnet 21 and corresponds to one side position of the frame 202 provided with a second OIS coil 22.

Notably, the term "position correspondence" as referred to herein is to be understood as: the coil structure on the side of the fixed part (i.e. the frame) and the magnet structure on the side of the movable part (i.e. the bearing seat/carrier) are opposite to each other, so that when current is applied to the coil, a relative acting force is generated between the magnet and the coil to drive the movable part to move relative to the fixed part. This relates to the working principle of the drive motor/ball motor, which is well known to the person skilled in the art, and thus the technical meaning of the related definition of the expression can be clearly understood.

Here, the first OIS carrier 10 is adapted to be disposed outside the optical lens and fixedly connected with the optical lens, the second OIS carrier 20 is disposed outside the first OIS carrier, and the AF carrier 30 is disposed outside the second OIS carrier and inside the frame 202.

Conveniently, a first OIS ball guide mechanism is provided between the first OIS carrier 10 and the second OIS carrier 20, the first OIS ball guide mechanism having a first OIS ball track G10 (see fig. 2 and 3A) provided on the upper surface of the second OIS carrier 20, the first OIS ball track extending in the X-direction for seating and guiding the first OIS balls B10; a second OIS ball guide mechanism having a second OIS ball track G20 (see fig. 2 and 3B) provided on the upper surface of the AF carrier 30 is provided between the second OIS carrier 20 and the AF carrier 30, the second OIS ball track extending in the Y direction to seat and guide the second OIS ball B20.

Advantageously, the AF ball guide mechanism provided at one side a of the AF carrier 30 has two AF ball tracks G30 extending in the Z direction for seating and guiding AF balls B30, the two AF ball tracks being arranged at corner regions at both ends of the one side a, and the AF magnet 31 being arranged between the two AF ball tracks G30. Thus, while the structural arrangement is reasonable, it is possible to ensure that the movement of the lens in the optical axis direction is stably guided at the time of focusing operation.

As shown in fig. 2 in particular, the carrier generally has a generally rectangular outline (a rectangular outline envelope P is shown in the figure), wherein one side a provided with the AF ball guide mechanism and the AF magnets 31 forms the widest side, while one side d adjacent to the side, not provided with magnets, forms the narrowest side, and the other two sides b, c adjacent to each other, each provided with OIS magnets, form two narrow sides, the width measured from the through-hole boundary to the peripheral boundary being la, lb, lc, ld, respectively, for the four sides a, b, c, d. The corner regions formed on the narrowest side and one of the adjacent narrow sides are provided with chamfers or rounds (schematically indicated by PA in the figure), so that the outline of the motor can be better adapted to the outline of an electronic device (such as a smart phone or a tablet personal computer), and the corresponding lens assembly and the camera module can be arranged at more corners.

As shown in fig. 2, three OIS ball tracks for receiving and guiding OIS balls are advantageously provided on the respective carrier, said OIS ball tracks being arranged in three corner regions, respectively, which are not formed with a chamfer or a radius. Thus, based on the principle that one plane is determined by three points, it is possible to ensure that the lens is stably guided to move in a plane perpendicular to the optical axis at the time of the anti-shake operation.

Fig. 4 shows a schematic diagram of the camera module.

The present invention also provides a lens assembly 1000, comprising: the optical lens 1 comprises a lens barrel and at least one lens arranged in the lens barrel; and a drive motor 2 as described above; wherein the optical lens is accommodated in a lens mounting hole formed by a hollow structure of a driving motor, and the driving motor is eccentrically disposed with respect to the bearing seat, i.e., a geometric center of the driving motor (substantially conforming to "O'" shown in fig. 2) is biased to one side with respect to an optical axis of the optical lens (i.e., a position of "O" shown in fig. 2), and has a widest side and a narrowest side (corresponding to side orientations denoted by "a" and "d" in fig. 2) defined based on a difference in width between a boundary of the lens mounting hole and a peripheral boundary thereof.

The invention correspondingly provides a camera module, which comprises: the lens assembly 1000 as described above; and a photosensitive assembly 2000 comprising a circuit board and a photosensitive chip attached to the circuit board; the outline of the camera module is at most protruded out of the outline of the driving motor at the widest side when the camera module is observed along the optical axis of the optical lens. As shown in fig. 4, the camera module generally further includes a color filter, which may be disposed between the optical lens and the photosensitive chip, and a lens holder structure, which may be fixed to the circuit board for mounting and supporting the lens assembly.

In some embodiments, the lens assembly is fixed to a lens mount 3 by the base of the drive motor and is in turn fixedly connected to the photosensitive assembly via the lens mount.

The implementation of the technical scheme of the invention is not limited to a specific lens seat structural form. The lens holder may be a separate molded piece fixed to the circuit board or may be an integral member integrally molded with the circuit board.

The invention further provides electronic equipment which is provided with a display screen and comprises the camera module, wherein the camera module is particularly suitable for forming a front camera arranged on the same side of the display screen. The camera module may be arranged in a top edge region or a corner region of the display screen.

Fig. 5A and 5B are schematic views of possible arrangements of the camera module on the display screen of the electronic device according to the first embodiment; FIGS. 6A and 6B are schematic diagrams illustrating possible arrangements of camera modules on a display screen of an electronic device according to a second embodiment; fig. 7A and 7B are schematic diagrams of possible arrangements of camera modules on a display screen of an electronic device according to a third embodiment.

The electronic device may be a smart phone or a tablet computer.

The technical solution of the invention will be explained in detail below with the aid of specific design examples.

As is well known, the camera module includes a photosensitive component and a light-transmitting component. The photosensitive assembly is generally composed of a circuit board, a photosensitive chip and electronic components; the photosensitive assembly may also include a molding body that may encase an electronic component (MOB); the molded body may also encapsulate a portion of the photosensitive area (MOC) of the photosensitive chip. The light transmission component is generally composed of a light filtering component and a lens component; the optical filter assembly comprises an optical filter, the optical filter is arranged on the lens seat, and the lens seat can be arranged on any one of the circuit board, the molding body and the photosensitive chip non-photosensitive area through glue; the lens assembly comprises an optical lens and a driving motor, and the motor can be selectively arranged on any one of the circuit board, the molding body and the lens seat through an adhesive.

The drive motor includes a fixed portion, a movable portion, and a drive member. The movable part is connected with the fixed part and carries an optical lens with an optical axis, and the optical axis is defined as a virtual axis passing through the center of the optical lens. The driving member is used for driving the movable part to move relative to the fixed part. The fixed part comprises a motor shell, a frame and a base. The movable part comprises a bearing seat and the like.

According to the present invention, when the optical lens, the driving motor, and the photosensitive element are aligned, the optical axis of the optical lens is not coincident with the virtual axis passing through the center of the fixing portion. That is, the motor is eccentrically disposed, and the widths of both sides of the opposite sides are different, among the four sides, the adjacent sides are narrower in width, and the adjacent sides are wider in width.

The casing, the frame and the base of the fixing part are sequentially arranged along the central shaft, the casing is positioned above the frame and the base, the casing can be combined with the base by welding or fusing, and the space formed inside after the combination can accommodate the movable part, the driving component and the like.

The housing is made of magnetically permeable material, preferably a material with high magnetic permeability, such as a ferromagnetic material, including iron, nickel, cobalt or alloys thereof, and the like, and has six pins extending in a direction parallel to the optical axis for retaining magnetism and enhancing magnetic force. The frame is made of a non-conductive or magnetically permeable material, such as plastic or a metal alloy. If the frame is made of magnetic conductive material, the frame also has the functions of magnetism retention and magnetic force enhancement, and has higher structural strength compared with non-conductive material.

The bearing seat is of a hollow structure and is used for bearing the lens assembly, and a thread structure corresponding to each other can be arranged between the bearing seat and the lens assembly, so that the optical lens is better fixed on the bearing seat, and the bearing seat is separated from the outer frame and the base of the fixing part by a certain distance, namely the bearing seat is not in direct contact with the outer frame and the base.

The carrier of the motor comprises at least two carriers: the AF carrier and the OIS carrier are overlapped with each other with the optical axis as the center in the top view, the OIS carrier is arranged in the AF carrier, and the OIS carrier is used for driving the lens to move in a plane (x-y) perpendicular to the optical axis. The OIS carrier may be configured to include two carriers, one of which (a first OIS carrier) drives the lens to move in the X direction and the other of which (a second OIS carrier) drives the lens to move in the Y direction for compensating for the shake in the correction horizontal direction. The AF carrier is used for driving the lens to move in the optical axis direction (i.e., Z direction) for focusing.

The first OIS carrier is disposed outside the optical lens and has a hollow structure, a thread structure matched with the first OIS carrier can be disposed between the first OIS carrier and the optical lens (especially the lens barrel), and the bearing seat/carrier is spaced from the outer frame and the base of the fixing portion by a certain distance, i.e. the bearing seat/carrier does not directly contact the fixing portion. The first OIS magnet is arranged on the outer side of one side of the first OIS carrier, the first OIS coil is arranged on the FPCB board, the first OIS magnet and the first OIS coil are respectively arranged on the corresponding sides, when the first OIS coil is electrified, the first OIS coil generates a magnetic field, the first OIS magnet is positioned in the magnetic field generated by the first OIS coil, the first coil and the first magnet generate lorentz force which repels or attracts each other, at the moment, the first OIS coil is fixed, the lorentz force drives the first OIS magnet to horizontally move along the x-axis direction, and then drives the first OIS carrier to horizontally move along the x-axis direction, so that the lens component is driven to horizontally move along the x-axis direction, and optical anti-shake in the x-axis direction is realized.

The second OIS carrier is disposed outside the first OIS carrier and is also hollow. The second OIS magnet is arranged on the outer side of one side of the second OIS carrier, the second OIS magnet is arranged on the outer side of one side of the second OIS carrier (arranged on the side adjacent to the first magnet, namely not arranged on one side or the opposite side of the first magnet), the second OIS coil is arranged on the FPCB board, the second OIS magnet and the second OIS coil are respectively arranged on the corresponding sides, when the second OIS coil is electrified, the second OIS coil generates a magnetic field, the second OIS magnet is positioned in the magnetic field generated by the second OIS coil, so that a mutually repulsive or attractive Lorentz force is generated between the second coil and the second magnet, at the moment, the second OIS coil is fixed, the Lorentz force drives the second OIS magnet to horizontally move along the y axis direction, and further drives the second OIS carrier to horizontally move along the y axis direction, and accordingly drives the lens assembly to horizontally move along the y axis direction, and optical anti-shake along the y axis direction is realized.

The first OIS ball tracks are disposed on the upper surface of the second OIS carrier and are used for placing and guiding the first OIS balls, preferably, the first OIS ball tracks are disposed at three right-angle corners of the second OIS carrier, the track direction is set along the x-axis direction, and the first OIS balls are disposed between the first OIS carrier and the second OIS carrier. The AF carrier is provided with a second OIS ball track for placing and guiding the second OIS balls, preferably, the second OIS ball track is located at three right-angled corners of the AF carrier, the track direction is set along the y-axis direction, and the second OIS balls are disposed between the second OIS carrier and the AF carrier.

The width (y-axis direction) of the first OIS ball tracks may correspond to the first OIS ball dimensions, and the length (x-axis direction) of the first OIS ball tracks may extend in the x-axis direction to allow the first OIS balls to roll or move within the first OIS ball tracks, reducing friction forces to allow the driving portion to move more flexibly and accurately, that is, the length of the first OIS ball tracks in the x-axis direction may be greater than the length of the first OIS ball tracks in the y-axis direction, so that the first OIS balls may move in the x-axis direction in accordance with the rolling motion, but the movement of the first OIS balls in the z-axis direction and the y-axis direction is restricted.

Similarly, the width (x-axis direction) of the second OIS ball track may correspond to the second OIS ball size, and the length (y-axis direction) of the second OIS ball track may extend in the y-axis direction to allow the second OIS balls to roll or move within the second OIS ball track, reducing friction may allow the driving portion to move more flexibly and accurately, that is, the length of the second OIS ball track in the y-axis direction may be greater than the length of the second OIS ball track in the x-axis direction, and thus the second OIS balls may move in the y-axis direction in accordance with the rolling motion, but the movement of the second OIS balls in the z-axis direction and the x-axis direction is restricted.

The width (y-axis direction) of the AF ball track may correspond to the third AF ball size, and the length (z-axis direction) of the AF ball track may extend along the z-axis direction to allow the third AF ball to roll or move within the AF ball track, reducing friction force to make the driving part move more flexibly and accurately. The third AF ball may move in the z-axis direction in accordance with the rolling motion, but the movement of the AF ball in the x-axis direction and the y-axis direction is restricted.

The AF carrier sets up in the second OIS carrier outside, and AF carrier and the inside and outside stack setting of second OIS carrier, and the AF carrier is located inside the frame, and the frame outside is provided with an FPCB board, and the FPCB board sets up the three sides in the frame outside, corresponds with first, second OIS magnetite and the side that the AF magnetite is located, sets up the frame side of FPCB board and is equipped with the trompil, is equipped with first OIS coil, second OIS coil and AF coil on the FPCB board.

AF carrier outside is provided with AF ball track for place and guide AF ball, AF ball track extends along the optical axis direction and sets up, and the preferred AF ball track quantity is 2, and two AF ball tracks set up in the two corners department of AF carrier homonymy, and the third AF ball is vertical to be placed along the optical axis direction, and preferred, the third AF ball sets up six altogether, and every AF ball track disposes three AF ball along the optical axis direction, drives the camera lens through rolling operation and reciprocates along the optical axis direction for focusing.

Be provided with the AF magnetite in the middle of two AF ball tracks of AF carrier, the AF coil sets up in the corresponding edge of FPCB board, AF coil and first OIS magnetite and second OIS magnetite do not superpose and set up, three magnetite sets up respectively on adjacent three sides, the AF magnetite sets up on first OIS magnetite or second OIS magnetite offside, the AF coil lets in the electric current, the AF coil produces the magnetic field, the AF magnetite is arranged in the magnetic field that the AF coil produced, produce the lorentz force of mutual repulsion or attraction between AF coil and the AF magnetite, the AF coil is motionless this moment, the lorentz force drives the AF magnetite and moves along the vertical motion of z axis direction, thereby can drive the AF carrier and move along the vertical motion of z axis direction, and then drive the camera lens subassembly and realize focusing along the vertical motion of z axis direction.

It should be noted that, according to another alternative embodiment of the present application, the first OIS carrier and the second OIS carrier may be combined into one OIS carrier. At this time, the first OIS magnet and the second OIS magnet are disposed on two adjacent sides of the OIS carrier, and the OIS carrier can move along the x-axis and y-axis directions by matching the OIS magnets with the OIS coils, so as to realize optical anti-shake in the horizontal direction. This embodiment reduces one carrier, and therefore correspondingly reduces the volume of the motor structure, facilitating miniaturization of the camera module.

One side of the bearing seat, where the AF ball track and the AF magnet are arranged, is wider, and the other side opposite to the AF ball track and the AF magnet is narrower, so that the AF ball track and the AF magnet are asymmetrically distributed; one side adjacent to the side provided with the AF ball track is provided with an OIS magnet, and the width is wider; the other side adjacent to the side provided with the AF ball track is not provided with a magnet, the width is narrower, the widths of the two sides are different, and then the motor structure is eccentrically arranged.

It is possible that the circuit board of the movable part may be a flexible circuit board, a flexible-rigid composite board, or the like, and the electronic component is disposed on the circuit board and may include a passive component, for example: capacitance, resistance, inductance, etc. The circuit board and the electronic component are arranged on one side of the driving mechanism, and in other embodiments, the circuit board and the electronic component are arranged on the base.

It is possible here to add further displacement sensors, for example hall effect sensors, allowing the drive motor to be controlled in a closed loop manner for autofocus as well as optical anti-shake effects.

The first OIS carrier may also be provided with a displacement sensor, for example a hall sensor. According to one embodiment of the application, the hall sensor is arranged outside the first OIS carrier. Preferably, the hall sensor is arranged on one side where the first OIS magnet is not arranged, and the hall sensor is arranged on the side, that is, four sides on the outer side of the first OIS carrier, one side is provided with the first OIS magnet, and one side is provided with the hall sensor, that is, the first OIS magnet is not arranged on the same side as the hall sensor. A Hall magnet is arranged on one side of the second OIS carrier corresponding to the accommodating hole of the Hall sensor, and the Hall sensor can sense the deviation between the actual position of the first OIS carrier in the moving process and the preset position of the first OIS carrier in the moving process through the matching of the magnet and the sensor and feed back the deviation. By providing a hall sensor, the movement of the optical lens can be driven and controlled more accurately.

Likewise, the second OIS carrier may also be provided with a displacement sensor, for example a hall sensor. According to another embodiment of the application, the hall sensor is arranged outside the second OIS carrier. Preferably, the hall sensor is arranged on one side where the second OIS magnet is not arranged, and the hall sensor is arranged on the side, that is, four sides on the outer side of the second OIS carrier, one side is provided with the second OIS magnet, and one side is provided with the hall sensor, that is, the second OIS magnet is not arranged on the same side as the hall sensor. A Hall magnet is arranged on one side of the AF carrier corresponding to the accommodating hole of the Hall sensor, and through the matching of the magnet and the sensor, the Hall sensor can sense the deviation between the actual position of the second OIS carrier in the moving process and the preset position of the second OIS carrier, and feed back the deviation. By providing a hall sensor, the movement of the optical lens can be driven and controlled more accurately.

Also, the AF carrier may be provided with a displacement sensor, such as a hall sensor. According to another embodiment of the present application, the hall sensor is arranged outside the AF carrier. Preferably, the hall sensor is arranged on one side where the AF magnet is not arranged, and one hall sensor is arranged on the side, that is, four sides on the outer side of the AF carrier, one side is provided with the AF magnet, and one side is provided with the hall sensor, that is, the AF magnet and the hall sensor are not arranged on the same side. One side of the frame corresponding to the accommodating hole of the Hall sensor (the frame is provided with holes corresponding to the three sides of the first OIS magnet, the second OIS magnet and the AF magnet), the Hall sensor is arranged on one side which is not provided with holes), and the Hall sensor can sense the deviation between the actual position in the AF moving process and the preset position of the AF carrier moving through the matching of the magnets and the sensor and feed back the deviation. By providing a hall sensor, the movement of the optical lens can be driven and controlled more accurately.

According to one implementation form, for the motor housing, the frame, the bearing seat, the substrate, the mirror seat in the camera module, the circuit board and other components, one corner area of the camera module is in a circular arc shape (namely a rounded structure), and the radian is approximately the same as that of the round edge of the screen of the terminal equipment, so that the camera module can be arranged at a position where the screen is closer to the corner, and the screen occupation ratio is enlarged. According to another embodiment, a corner area of the motor housing, the frame, the bearing seat, the substrate, the lens seat, the circuit board and other components in the camera module is provided with a unfilled corner (i.e. a chamfer structure), in this way, the camera module can be arranged at a position of the screen closer to the corner, and the screen occupation ratio is enlarged.

It is possible here to add dust catching glue on the four sides of the motor base plate in order to intercept dust.

In general, it is possible that the first lens of the optical lens may be provided with a protrusion protruding toward the object, so that the height of the image capturing module in the optical axis direction may be reduced and the light input amount may be increased.

According to the invention, the motor structure is changed, the motor volume is reduced, and the motor placement position and placement angle are optimized to be matched with the screen shape of the mobile terminal equipment, so that the camera module can be arranged at a position closer to the rounded corner of the mobile phone, the screen occupation ratio is further enlarged, the screen utilization rate is increased, and the full screen is realized.

The invention further provides a camera with the camera module and electronic equipment (such as a smart phone), wherein the electronic equipment comprises a display screen and a front camera, the front camera is arranged at the rear side of the display screen and positioned at the inner side of the electronic equipment and aligned to the display screen, and the front camera is used for shooting images through the display screen. The front camera is aligned with the transparent display screen, the transparent display screen is used for transmitting light, the non-aligned display screen is used for displaying images, the transparent display screen is arranged in a round shape, and the front camera can be arranged at the center above the screen or at the upper end corner of the screen (namely the upper left corner or the upper right corner of the screen) while guaranteeing the light entering quantity so as to enlarge the screen duty ratio.

In the camera module of the invention, the components arranged on the four sides are different, wherein the width of the side without the magnet track is the narrowest, so the camera module is in an eccentric structure, and the narrowest side is arranged close to the edge of a screen, so that the lens component is more close to the edge of the screen.

Regarding the arrangement of the camera module on the screen side of an electronic device (such as a smart phone), the following implementation may be adopted:

Embodiment one (see FIGS. 5A and 5B)

The camera module is arranged at the middle position above the screen, and because in the camera module, the AF magnet and the AF ball track are only arranged on one side a of the AF carrier, and the opposite side c is not provided with the AF magnet and the ball track, the width of the side is narrow, and the narrow side can be arranged near the edge of the screen (as shown in fig. 5A). Two sides adjacent to the side a provided with the AF ball track, one side d of which is not provided with the OIS magnet and has a narrow width, may be provided near the edge of the screen (as shown in FIG. 5B). In this case, the lens optical axis is closer to the screen edge than the geometric center of the camera module, and the camera module is further from the screen edge than the lens body.

Second embodiment (see FIG. 6A)

The camera module is arranged above the screen near the corner, and can be arranged above the screen near the upper left corner or at the corner near the upper right corner. Meanwhile, one corner of the camera shooting module is set to be arc-shaped, the radian of the arc angle is approximately the same as that of the round corner edge of the screen, and the arc-shaped edge of the camera shooting module corresponds to the round corner above the screen.

Because in the above-mentioned module, AF magnetite and AF ball track only set up on AF carrier's a side, and side c that is opposite to it does not set up AF magnetite and ball track, because this limit has omitted magnetite and ball track, the width is narrower, can set up this narrow limit on the side that is close to the screen left side, make the lens optical axis compare in the geometric center of camera module be close to screen right side (the camera lens setting is right side in the upper right corner of the screen, the camera lens setting is left side in the upper left corner of the screen), the camera module is kept away from screen right side (the camera lens setting is right side in the upper right corner of the screen, the camera lens setting is left side in the upper left corner of the screen) edge except that the optical lens body.

Two sides adjacent to the side a provided with the AF ball track, wherein one side d is not provided with the OIS magnet, the width of the side is narrower, the side can also be arranged at the position close to the upper edge of the screen, the optical axis of the lens is closer to the upper edge of the screen than the geometric center of the camera module, the parts of the camera module except the lens body are far away from the upper edge of the screen, and the lens is closer to the upper edge of the screen.

The mode can enable the lens optical axis to be closer to the screen corner edge than the geometric center of the camera module, and the mobile phone camera is closer to the screen corner edge, so that the screen occupation ratio is improved, and the full-face screen is realized.

Embodiment III (see FIG. 6B)

Because in above-mentioned module, AF magnetite and AF ball track only set up on AF carrier's a side, and side c opposite thereto does not set up AF magnetite and ball track, because this limit has omitted magnetite and ball track, and the width is narrower, can set up this narrow limit on the side that is close to the screen top, makes the camera lens optical axis compare in the geometric center of camera module and is close to the screen top edge more, and the camera module is kept away from screen top edge department except the part of camera lens body.

Two sides adjacent to the side a provided with the AF ball track, wherein one side d is not provided with an OIS magnet, the width of the side is narrower, the side can also be arranged at the edge close to the right side of the screen (the lens is arranged at the upper right corner of the screen and is arranged at the left side), the optical axis of the lens is closer to the edge of the right side of the screen (the lens is arranged at the upper right corner of the screen and is arranged at the left side) than the geometric center of the camera module, the parts of the camera module except the lens body are far away from the edge of the right side of the screen (the lens is arranged at the upper right corner of the screen and is arranged at the left side), and the lens is closer to the edge of the right side of the screen (the lens is arranged at the upper right corner of the screen and is arranged at the left side).

Fourth embodiment (see FIG. 7A)

The camera module is arranged above the screen near the corner, and can be arranged above the screen near the upper left corner or at the corner near the upper right corner. Meanwhile, one corner of the camera module is set to be an unfilled corner, and the unfilled corner of the camera module corresponds to the round corner above the screen.

Because in the above-mentioned module, AF magnetite and AF ball track only set up on AF carrier's a side, and side c that is opposite to it does not set up AF magnetite and ball track, because this limit has omitted magnetite and ball track, the width is narrower, can set up this narrow limit on the side that is close to the screen left side, make the lens optical axis compare in the geometric center of camera module be close to screen right side (the camera lens sets up in the upper right corner of the screen and then is the right side, the camera lens sets up in the upper left corner of the screen then is the left side) edge, the camera module is kept away from screen right side (the camera lens sets up in the upper right corner of the screen then is the right side), the camera lens sets up in the upper left corner of the screen then is left side) edge.

Embodiment five (see FIG. 7B)

Although exemplary embodiments of the present invention have been described above, it will be understood by those skilled in the art that various changes and modifications may be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the invention, and all such changes and modifications are intended to be included within the scope of the present invention.

The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the invention referred to in this application is not limited to the specific combinations of features described above, but it is intended to cover other embodiments in which any combination of features described above or equivalents thereof is possible without departing from the spirit of the invention. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.

Claims

1. A drive motor adapted for use in a lens assembly of a camera module, comprising:

the fixing part comprises a shell, a frame and a base;

the movable part comprises at least one bearing seat which is suitable for being fixedly connected with an optical lens of the lens assembly; and

a driving member capable of driving the movable portion to move relative to the fixed portion;

wherein a movement guide mechanism is provided between the movable portion and the fixed portion, the at least one carrier is configured as a hollow member having a through hole, the movement guide mechanism is provided in a side region of the hollow member and is arranged in an asymmetric manner such that a geometric center of the carrier is biased to one side with respect to a center of the through hole, the carrier has a widest side and a narrowest side defined based on a difference in width between a boundary of the through hole and a peripheral boundary thereof; the housing, frame and base and combinations thereof have a hollow structure and profile corresponding to the load bearing seat.

2. The drive motor according to claim 1, wherein each constituent element of the movable portion and the drive member is accommodated in an internal space formed by a combination of the housing, the frame, and the base, while a predetermined clearance is maintained between the housing, the frame, and the base as the fixed portion and the carrier as the movable portion.

3. The drive motor according to claim 2, wherein the drive motor is a ball motor, the movement guide mechanism is a ball guide mechanism including balls and ball tracks, the drive member includes a coil provided in the fixed portion, and a magnet is provided in the movable portion to cooperate with the coil.

4. A driving motor according to claim 3, wherein the carrier comprises an AF carrier adapted to drive the optical lens to move in the optical axis direction, the AF carrier being a rectangular hollow flat member having four sides parallel to each other, wherein an AF ball guide mechanism is provided only on one side of the AF carrier.

5. The drive motor of claim 4, wherein the carrier further comprises at least one OIS carrier adapted to move the optical lens in a plane perpendicular to the optical axis, the OIS carrier having a hollow structure and a contour corresponding to the AF carrier, the AF carrier and OIS carrier being disposed one above the other, wherein the OIS carrier is disposed inside the AF carrier.

6. The drive motor of claim 5, wherein the ball motor has an FPCB plate fixedly disposed at a side of the frame, and the FPCB plate has one coil, i.e., an AF coil at one side and first and second OIS coils at two adjacent sides, on three sides of the frame, respectively.

7. The drive motor according to claim 6, wherein one side of the AF carrier provided with the ball guide mechanism is fixedly provided with an AF magnet and corresponds to one side position of the frame provided with an AF coil; the two adjacent sides of the OIS carrier are fixedly provided with a first OIS magnet and a second OIS magnet and correspond to the two adjacent sides of the frame, which are provided with a first OIS coil and a second OIS coil.

8. The drive motor according to claim 6, wherein one side of the AF carrier provided with the ball guide mechanism is fixedly provided with an AF magnet and corresponds to one side position of the frame provided with an AF coil; the OIS carrier comprises a first OIS carrier suitable for driving the optical lens to move along the X direction and a second OIS carrier suitable for driving the optical lens to move along the Y direction, wherein the optical axis direction of the optical lens is defined as the Z direction, the X direction, the Y direction and the Z direction respectively correspond to the X axis, the Y axis and the Z axis of a space rectangular coordinate system, one side edge of the first OIS carrier is fixedly provided with a first OIS magnet and corresponds to one side edge position of the frame, which is provided with a first OIS coil, and one side edge of the second OIS carrier is fixedly provided with a second OIS magnet and corresponds to one side edge position of the frame, which is provided with a second OIS coil.

9. The drive motor of claim 8, wherein the first OIS carrier is adapted to be disposed outside of and fixedly coupled to the optical lens, the second OIS carrier is disposed outside of the first OIS carrier, and the AF carrier is disposed outside of the second OIS carrier and within the frame.

10. The drive motor of claim 9, wherein a first OIS ball guide is provided between the first OIS carrier and the second OIS carrier, the first OIS ball guide having a first OIS ball track provided on an upper surface of the second OIS carrier, the first OIS ball track extending in the X-direction for seating and guiding a first OIS ball; a second OIS ball guide mechanism is disposed between the second OIS carrier and the AF carrier, the second OIS ball guide mechanism having a second OIS ball track disposed on the upper surface of the AF carrier, the second OIS ball track extending in the Y-direction for seating and guiding a second OIS ball.

11. The drive motor according to claim 10, wherein the AF ball guide mechanism provided at one side of the AF carrier has two AF ball tracks extending in the Z direction for seating and guiding AF balls, the two AF ball tracks being arranged at corner regions at both ends of the one side, the AF magnet being arranged between the two AF ball tracks.

12. The drive motor according to claim 7 or 8, wherein the carrier has a rectangular outline, wherein one side provided with the AF ball guide mechanism and the AF magnets forms the widest side, and one side adjacent to the side and not provided with magnets forms the narrowest side, and the other two sides adjacent to each other and respectively provided with OIS magnets form two narrow sides.

13. The drive motor of claim 12, wherein a corner region formed at the narrowest side and one of the narrow sides adjacent thereto is configured with a chamfer or a radius.

14. The drive motor of claim 13, wherein there are three OIS ball tracks on the respective carriers for seating and guiding OIS balls, the OIS ball tracks being arranged in three corner regions, respectively, where no chamfer or radius is configured.

15. A lens assembly, comprising:

the optical lens consists of a lens barrel and at least one lens arranged in the lens barrel; and

the drive motor according to any one of claims 1 to 14;

the optical lens is accommodated in a lens mounting hole formed by a hollow structure of a driving motor, and the driving motor is eccentrically arranged corresponding to the bearing seat, namely, the geometric center of the driving motor is deviated to one side relative to the optical axis of the optical lens, and has a widest side and a narrowest side which are defined based on the difference of widths between the boundaries of the lens mounting hole and the peripheral boundary.

16. The lens assembly of claim 15, wherein the movable portion of the driving motor and the barrel of the optical lens are fixedly connected to each other by a snap structure, a screw structure, or a glue adhesive.

17. The lens assembly of claim 16, wherein the movable portion of the drive motor is capable of controllably moving the optical lens in the direction of the optical axis.

18. A lens assembly according to claim 16 or 17, wherein the movable part of the drive motor is capable of controllably moving the optical lens in a plane perpendicular to the optical axis.

19. A camera module, comprising:

the lens assembly of any of claims 15 to 18;

the photosensitive assembly comprises a circuit board and a photosensitive chip attached to the circuit board;

the outline of the camera module is at most protruded out of the outline of the driving motor at the widest side when the camera module is observed along the optical axis of the optical lens.

20. The camera module of claim 19, wherein the lens assembly and the photosensitive assembly are positioned and fixed by an active alignment technique.

21. The camera module of claim 19 or 20, wherein the lens assembly is fixed to a lens mount by a base of the drive motor and is further fixedly connected to the photosensitive assembly via the lens mount.

22. The camera module of claim 19 or 20, wherein the lens assembly is secured to a lens mount integrally constructed with the circuit board of the photosensitive assembly by a mount of the drive motor.

23. An electronic device having a display screen and comprising a camera module according to any one of claims 19 to 22, the camera module constituting a front-facing camera arranged on the same side as the display screen.

24. The electronic device of claim 23, wherein the camera module is disposed at a top edge region or a corner region of the display screen.

25. The electronic device of claim 23 or 24, wherein the camera module is biased towards an edge of the display screen with the narrowest side and is biased away from the edge of the display screen with the widest side.

26. The electronic device of claim 23 or 24, wherein the electronic device is a smart phone or a tablet computer.