CN117008278A

CN117008278A - Optical assembly and assembly method thereof

Info

Publication number: CN117008278A
Application number: CN202210473080.7A
Authority: CN
Inventors: 陈烈烽; 刘春梅; 戚杨迪; 刘佳; 郭美杉
Original assignee: Ningbo Sunny Opotech Co Ltd
Current assignee: Ningbo Sunny Opotech Co Ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2023-11-07

Abstract

The application provides an optical component and an assembling method thereof, wherein the positions of a first lens part and a second lens part are synchronously adjusted by fixing a third lens part by taking the optical axis as a reference, according to the influence of the sensitivity of an optical lens, the first lens part with higher sensitivity and a shell of a driving device are firstly fixed, then the position of the second lens part with secondary sensitivity is adjusted, finally the second lens part can be clearly imaged and then is fixed on a focusing carrier of the driving device, and finally the optical component is formed and assembled. By the assembly method, the accuracy of the assembled optical component can be ensured while the assembly process flow is simplified.

Description

Optical assembly and assembly method thereof

Technical Field

The application relates to the technical field of camera modules, in particular to an optical assembly capable of performing optical anti-shake internal focusing and a camera module.

Background

The optical lens is one of the necessary components of the camera module, and can collect incident light rays to enable the camera module to image. In recent years, as the requirements of users on the imaging quality of the imaging module are higher and higher, the pixels of the imaging module are also continuously improved, and meanwhile, in order to improve the imaging quality of the imaging module, the size of the photosensitive chip is correspondingly increased, so that the design requirements on the optical lens adapted to the photosensitive chip are also higher and higher. The existing integrated optical lens configured in the camera module comprises a lens barrel and a plurality of lenses arranged in the lens barrel, and due to the technical limitations of the design and the assembly method of the integrated optical lens, the camera module configured with the integrated optical lens is difficult to meet the requirement of miniaturization of the large-chip camera module, meanwhile, the total height of the lens is higher, and in order to realize an automatic focusing function, a certain avoiding space is reserved in the module for focusing movement of the lens.

How to realize focusing and anti-shake of an optical lens matched with a large-size chip and simultaneously ensure miniaturization of the whole structure of the optical lens is still a technical problem which needs to be solved rapidly at present.

Disclosure of Invention

In view of the above problems, the present invention provides a lens driving structure suitable for focusing in a large-sized chip, which can solve some or most of the problems existing in the existing integrated lens scheme while realizing the anti-shake function.

The invention provides an internal focusing camera module optical component suitable for a large image plane, which aims to improve the imaging quality of a camera module, increases the size of a photosensitive chip, increases the driving force requirements for anti-shake and focusing, and ensures the miniaturization of the whole structure while improving the imaging quality of the camera module, thus being one of the problems which are urgently needed to be solved at present.

After the size of the photosensitive chip increases, the size of the optical lens adapted to the photosensitive chip also increases, and at the same time, the weight of the optical lens also increases, and in some cases, the driving force provided by the driving device may be insufficient to drive the optical lens to perform focusing and anti-shake due to the excessive weight of the optical lens. If the structure of the driving device is improved to provide a larger driving force, the overall size of the driving device is increased, and the current trend of miniaturization development is not met.

Based on the technical difficulties, the optical lens is divided into a plurality of lens groups, so that the driving device drives part of the groups to move, focusing and anti-shake effects in the large chip imaging process are realized, and the imaging quality of the imaging module is improved while the miniaturization of the whole structure is considered.

An object of the present invention is to provide an optical assembly and an image pickup module, which divide an overall optical lens into a plurality of lens groups, and drive a part of the lens portions therein to move, thereby improving imaging quality and ensuring miniaturization of the overall structure.

Another object of the present invention is to provide an optical assembly and an image capturing module, in which a driving device is disposed to at least one lens portion of a plurality of groups of optical lenses.

Another object of the present invention is to provide an optical assembly and an image capturing module, in which the optical lens group mainly includes three lens portions, so that the second lens portion is movable, and the driving force deficiency is solved.

Another object of the present invention is to provide an optical assembly and an image capturing module, so that, when the first lens portion and the third lens portion are fixedly installed, a certain gap is kept between the first lens portion and the third lens portion, and a focusing distance of the second lens portion is reserved.

Another object of the present invention is to provide an optical assembly and an image capturing module, in which the first lens portion and the third lens portion are fixed on a fixed portion of the driving device, the second lens portion is fixed on a movable portion of the driving device, and the driving portion lens achieves an anti-shake or focusing function.

Another objective of the present invention is to provide an optical assembly and an image capturing module, wherein the optical anti-shake unit of the driving device drives the second lens portion to perform optical anti-shake, so as to implement optical anti-shake in the lens group.

Another object of the present invention is to provide an optical assembly and an image capturing module, wherein the focusing portion of the driving device drives the second lens portion to focus, so as to achieve focusing in the lens group.

Another object of the present invention is to provide an optical assembly and an image capturing module, in which the focusing and anti-shake modules in the optical assembly share a magnet pair, so that the space in the driving device can be fully utilized, and the overall structure can be miniaturized.

Another object of the present invention is to provide an optical assembly and an image capturing module, in which a magnet pair is shared by a focusing module and an anti-shake module in the optical assembly, so that structural members are reduced, the structure is compact, and the size of the optical assembly is reduced, thereby achieving miniaturization.

Another object of the present invention is to provide an optical assembly and an image capturing module, in which the second lens portion moves in the housing, and focusing and anti-shake are performed by fully utilizing the internal space, so that reasonable configuration of the structure is achieved, and miniaturization of the structure is satisfied.

Another object of the present invention is to provide an optical assembly and an image capturing module, in which the housing provides a bearing surface for the first lens portion and an accommodating space for the second lens portion, and the structure is compact, thereby reducing the size in the Z direction.

Another object of the present invention is to provide an optical assembly and an image capturing module, in which the anti-shake member is disposed above the chassis, the third lens portion is directly fixed to the chassis, and the anti-shake member is mounted at a mounting position on the lower side of the chassis, thereby achieving a reduction in size in the Z direction.

Another object of the present invention is to provide an optical assembly and an image pickup module, which fix a third lens portion on a motor base, and reserve a movable space for movement of a second lens portion, preventing collision between the second lens portion and a driving device base.

Another object of the present invention is to provide an optical assembly and an image capturing module, in which a third lens portion is mounted on a lower surface of a motor base, so as to provide a sufficient mounting space for the third lens portion, and ensure the stability of the connection of the third lens portion.

Another object of the present invention is to provide an optical assembly and an image capturing module, in which a circuit structure is injection molded inside a base of a driving device.

Another object of the present invention is to provide an optical assembly and an image capturing module, in which the yoke plate is disposed by means of insert injection molding of the yoke plate in the base, and two sides are adjacent and connected to each other, so as to reduce the resistance of the movable carrier to recover.

Another object of the present invention is to provide an optical module and an image pickup module, which provide a miniaturized image pickup module by providing a photosensitive assembly structure formed based on a molding base, molding a junction of a circuit board and a photosensitive chip.

Other advantages and features of the present invention will become more fully apparent from the following detailed description, and may be learned by the practice of the invention as set forth hereinafter.

According to one aspect of the present invention, there is provided a method of assembling an optical component, comprising:

(a) Providing an optical lens, wherein the optical lens comprises a first lens part, a second lens part and a third lens part which are sequentially arranged from an object side to an image side along the optical axis direction;

(b) The third lens part and the fixing part of the optical assembly are fixedly arranged;

(c) Pre-positioning the first lens portion along an optical axis of the third lens portion;

(d) Assembling and calibrating the first lens part, the second lens part and the third lens part to form a clearly imaged optical lens;

(e) And fixing the first lens part to the fixing part, and fixing the second lens part to a movable part of the optical assembly.

Wherein in the step (d), assembling and calibrating the first lens part, the second lens part and the third lens part comprises the following steps:

calibrating a Z-direction gap of the second lens part by taking the third lens part as a reference;

correcting a gap in an XY direction of the first lens portion with the third lens portion and the second lens portion as references;

correcting the position of the second lens part in the XY direction by taking the third lens part as a reference;

and correcting the position of the first lens part in the XY direction by taking the third lens part and the second lens part as references.

Wherein step (e) comprises:

fixing the first lens part and the fixing part;

adjusting the second lens portion in a plurality of degrees of freedom with respect to the fixedly connected first and third lens portions;

And when the optical lens formed by the second lens part, the first lens part and the third lens part can meet the imaging requirement, fixing the second lens part and the movable part.

In the step (b), the fixing portion includes a base, the base includes a base main body and a supporting portion, the supporting portion and the base main body form a mounting position, and the third lens portion is fixed at the mounting position.

Wherein the fixing part also comprises a shell, the shell comprises a main body and a bearing part, the main body is hollow ring-shaped, the upper end surface close to the object side extends inwards to form the bearing part,

wherein in the step (c), the bearing portion of the first lens portion, which is intended to be assembled on the housing, is held above the second lens portion.

The movable part comprises an optical anti-shake part, the second lens part is assembled on the movable part in a scheduled mode, and the optical anti-shake part drives the second lens part to move along the direction perpendicular to the optical axis relative to the first lens part and the third lens part.

The main body and the bearing part form an accommodating space, the second lens part is arranged in the accommodating space, and the second lens part moves in the accommodating space along the direction perpendicular to the optical axis.

The bearing part of the shell is provided with an avoidance groove, and the second lens part is clamped and adjusted through the avoidance groove.

The second lens group comprises a clamping part, the clamping part extends outwards integrally along the side edge of the second lens part and extends into a space of an avoidance groove formed by the shell, and the position of the second lens part is adjusted by clamping the clamping part through the avoidance groove.

Further objects and advantages of the present application will become fully apparent from the following description and the accompanying drawings.

These and other objects, features and advantages of the present application will become more fully apparent from the following detailed description, the accompanying drawings and the appended claims.

Drawings

The above and other objects, features and advantages of the present application will become more apparent by describing embodiments of the present application in more detail with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate the application and together with the embodiments of the application, and not constitute a limitation to the application. In the drawings, like reference numerals generally refer to like parts or steps.

Fig. 1 is a diagram showing the overall structure of an optical assembly having a split optical lens in the present application.

Fig. 2 shows a schematic cross-sectional view of an optical assembly with a split optical lens according to the present application.

Fig. 3 shows a perspective exploded view of the optical assembly of the present application.

Fig. 4 is an exploded view showing a focusing part and an optical anti-shake part of the driving device according to the present application.

Fig. 5 is a schematic diagram showing a combination of a focusing part and an optical anti-shake part of a driving device according to the present application.

Fig. 6 is a schematic diagram showing a structure in which a third lens is mounted on a base.

Fig. 7 shows an exploded view of the optical anti-shake portion and the chassis of the optical assembly of the present application.

Fig. 8 shows a schematic cross-sectional view of the base structure of the driving device of the present application.

Fig. 9 is a schematic view showing the structure of an image pickup module provided with an optical assembly in the present application.

Fig. 10 shows a cross-sectional view of an imaging module provided with an optical assembly in the present application.

Fig. 11 shows an exploded view of the second lens part and the driving device according to the application.

Fig. 12 shows a sectional view of the second lens part and the driving device of the present application after assembly.

Detailed Description

Hereinafter, exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. It should be apparent that the described embodiments are only some embodiments of the present application and not all embodiments of the present application, and it should be understood that the present application is not limited by the example embodiments described herein.

In the description of the present application, it should be noted that, for the azimuth words such as terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present application and simplifying the description, and it is not to be construed as limiting the specific scope of protection of the present application that the device or element referred to must have a specific azimuth configuration and operation.

It should be noted that the terms "first," "second," and the like in the description and in the claims are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

The terms "comprises" and "comprising," along with any variations thereof, in the description and claims, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or both elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

Exemplary optical Assembly

As shown in fig. 1 to 8, an optical assembly according to an embodiment of the present application is illustrated, wherein the optical assembly includes an optical lens 20 and a driving device 30. Wherein, the optical lens 20 is a split type optical lens part, and comprises a plurality of lens parts, wherein the lens parts are arranged along the direction of the optical axis, and the part of the optical lens 20 is arranged inside the driving device 30 and is held and driven by the driving device 30.

The optical lens includes a first lens portion 21, a second lens portion 22, and a third lens portion 23, the first lens portion 21, the second lens portion 22, and the third lens portion 23 being sequentially disposed from an object side to an image side along a direction of an optical axis. Wherein the first lens part 21 is disposed at an upper side of the driving device 30, the second lens part 22 is disposed inside the driving device 30, and the third lens part 23 is disposed below the driving device 30 to allow light to sequentially pass through the first lens part 21, the second lens part 22, and the third lens part 23 of the optical lens 20.

Wherein the first lens part 21 includes a first lens barrel 211 and at least a first lens group 212 installed in the first lens barrel 211, the second lens part 22 includes a second lens barrel 221 and at least a second lens group 222 installed in the second lens barrel 221, the third lens part 23 includes a third lens barrel 231 and at least a third lens group 232 installed in the third lens barrel 231, and the first lens group 212, the second lens group 222 and the third lens group 232 cooperate with each other to form an imageable optical system.

It will be appreciated by those skilled in the art that for an imageable optical system formed by the first and second lens portions 21, 22 and the third lens portion 23, the effective focal length of the imageable optical system is proportional to the number of optical lens groups and the resolving power is also proportional to the number of optical lens groups over a predetermined range of lens groups.

Based on such technical requirements, if the split lens is implemented as a conventional driving device, that is, the driving device drives the whole optical lens to perform focusing and anti-shake, due to the fixed relative positional relationship between the lens groups, the split lens will have a relatively large height dimension, and thus the driving device as a whole has a relatively large height dimension, which is difficult to meet the requirement of miniaturization of the optical component.

In view of the above-mentioned problems, in the embodiment of the present application, the middle lens portion of the split type lens 20 is configured such that the relative positions of the second lens portion 22 with respect to the first lens portion 21 and the third lens portion 23 can be adjusted, wherein the first lens portion 21 and the third lens portion 23 are fixed to the fixed portion of the driving device 30, respectively, so that, during shooting, the second lens portion 22 of the split type lens is disposed on the movable portion of the driving device 30, and the second lens portion 22 is adjusted to a predetermined position to form a clear image, thereby satisfying the design requirement of miniaturization of the optical assembly while solving the problem that the driving force is insufficient when the driving device 30 drives the whole lens.

The second lens part 22 is disposed inside the driving device 30 and connected to a movable part of the driving device 30, the driving device 30 may be implemented to provide a focusing driving force and an optical anti-shake driving force for the second lens part 22, that is, the movable part includes a focusing part 32 and an optical anti-shake part 33, in one embodiment, the second lens part 22 is fixed in a focusing carrier 321 of the focusing part 32 of the driving device 30, the focusing part 32 is accommodated inside the optical anti-shake part 33, and the focusing part 32 may move synchronously with the optical anti-shake part 33. The second lens part 22 can be driven by the focusing part 32 to move along the direction of the optical axis, so as to realize focusing in the shooting process; the second lens part 22 may be driven by the optical anti-shake part 33 to move in a direction perpendicular to the optical axis, thereby achieving an anti-shake effect during photographing.

In the embodiment of the present application, the optical lens 20 and the driving device 30 are configured such that the driving device 30 can drive the optical lens 20 with increased size to move to achieve photographing. The driving device 30 drives the second lens portion 22 to move, the first lens portion 21 and the third lens portion 23 are respectively fixed on the driving device 30, and the second lens portion 22 is fixed inside the driving device 30, so that the driving device 30 drives a part of the optical lens 20, namely the second lens portion 22, to move, thereby achieving the effects of optical anti-shake and focusing by using a relatively smaller driving device, and solving the problems of large overall height and insufficient driving force of the lens under the trend of large image plane of the image pickup module.

Based on the above structure, the fixing portion of the driving device 30 includes a housing 31 and a base 34, the housing has an accommodating space 313, the first lens portion 21 is fixed on the upper surface of the housing 31, the third lens portion 23 is fixed on the base 34, an accommodating space is formed between the housing 31, the first lens portion 21 and the third lens portion 23, the second lens portion 22 is fixed with the focusing portion 32 on the driving device 30, is accommodated in the accommodating space, is disposed in the accommodating space, and is configured to be displaceable under the driving force of the driving device 30. The second lens part 22 is provided so as to be movable in the accommodating space, and further, the second lens part 22 is adapted to perform XYZ-direction movement in the movable space. For convenience of explanation, the implementation of optical focusing and optical anti-shake will be further explained by establishing a spatial coordinate system. Defining the optical axis direction of the optical system as a Z-axis direction (i.e., a direction set by a Z-axis), a first preset direction perpendicular to the plane in which the optical axis is located as an X-axis direction (i.e., a direction set by an X-axis), and a second preset direction perpendicular to the plane in which the optical axis is located as a Y-axis direction (i.e., a direction set by a Y-axis). In the embodiment of the application, the X-axis direction and the Y-axis direction are mutually perpendicular, and the Z-axis direction is perpendicular to the plane in which the X-axis direction and the Y-axis direction are located, in other words, the X-axis, the Y-axis and the Z-axis form a three-dimensional rectangular coordinate system.

Specifically, as shown in fig. 3 to 8, in the embodiment of the present application, the driving device 30 includes a housing 31, a focusing portion 32, an optical anti-shake portion 33, and a base 34, wherein the second lens portion 22 is disposed inside the driving device 30, the focusing portion 32 is configured to drive the second lens portion 22 to move along the direction of the optical axis to achieve optical focusing, and the optical anti-shake portion 33 is configured to drive the second lens portion 22 to move along the direction perpendicular to the optical axis to achieve optical anti-shake.

In some embodiments, the focusing part 32 is accommodated inside the optical anti-shake part 33, and the second lens part 22 is disposed on the focusing part 32, and when the optical anti-shake part 33 drives the second lens part 22 to move along a direction perpendicular to the optical axis, the focusing part 32 and the second lens part 22 are driven to move together along a direction perpendicular to the optical axis, so as to realize an anti-shake effect in the shooting process.

It is to be noted that the positional relationship of the focusing portion 32 and the optical anti-shake portion 33 is not limited in the optical assembly of the present application. In other embodiments, the optical anti-shake portion 33 may be located inside the focusing portion 32, and when the focusing portion 32 drives the second lens portion 22 to move along the optical axis, the optical anti-shake portion 33 may be simultaneously driven to move along the optical axis, so as to achieve the focusing effect during the shooting process.

Further, as shown in fig. 3, the housing 31 of the driving device 30 has a main body 311 and a bearing portion 312, the main body 311 of the housing 31 is hollow and annular, and the upper end surface near the object side extends inward to form the bearing portion 312 for bearing against the first lens portion 21. The bearing portion 312 has at least one opening 3121 and at least one avoidance groove 3122, the opening 3121 corresponds to the first lens portion 21, so that light enters through the first lens portion 21, the avoidance groove 3122 is formed along a radial direction of the opening 3121 or along an optical axis direction, and the avoidance groove 3122 is disposed between the bearing surface 312 and the first lens portion 21. The housing 31 further has an accommodating space 313, and the main body 311 of the housing 31 and the bearing portion 312 form the accommodating space 313 to accommodate the focusing portion 32 and the optical anti-shake portion 33 therein.

Further, in the embodiment of the present application, the avoidance groove 3122 forms an adjustment space of the second lens portion 22 to facilitate adjustment of the position of the second lens portion 22 in a subsequent assembly process. In a specific embodiment, the number of the avoidance grooves 313 may be two, which are respectively disposed on two sides of the second lens portion 22 and symmetrically disposed with respect to the second lens portion 22, and the number of the avoidance grooves 313 may be four, which are disposed at equal intervals around the second lens portion 22.

The design of the avoidance groove 3122 is to facilitate process assembly, that is, when the optical assembly is assembled, the assembly device clips the second lens portion 22 located in the driving device 30 from the outside, and performs real-time adjustment based on the imaging quality of the whole lens optical imaging system to perform assembly, thereby improving the accuracy, reliability and efficiency of assembly.

In one specific example of the present application, as shown in fig. 4 to 5, the focusing portion 32 includes a focusing carrier 321, at least one focusing coil 322, at least one focusing magnet 323, a frame 324, a holder 325 and a focusing sensor 326, wherein the focusing carrier 321 has a carrying outer side 3211, a carrying inner side 3212 corresponding to the carrying outer side, and a light transmitting hole 3213. The light-passing hole 3213 is located inside the focusing carrier 321, the second lens portion 22 is disposed in the light-passing hole 3213 and fixed to a carrying inner side 3212 of the focusing carrier 321, the focusing coil 322 is disposed on a carrying outer side 3211 of the focusing carrier 321, and the focusing magnet 323 is disposed on the frame 324 corresponding to a position of the focusing coil 322. When the focusing coil 322 is energized, an interaction force is generated with the focusing magnet 323, so that the focusing part 32 drives the second lens part 22 to move along the optical axis for focusing.

More specifically, the focusing carrier 321 is annular, the second lens portion 22 is disposed on the inner side 3212 of the focusing carrier 321, the focusing coil 322 is wound on the outer side 3211 of the focusing carrier 321, and the focusing magnet 323 is disposed around the focusing coil 322. The frame 324 is annular and is located at the outer side of the second lens portion 22, wherein the number of the focusing magnets 323 may be two, and the focusing magnets 323 are symmetrically disposed at two opposite sides of the frame 324.

In some embodiments, the outer bearing side 3211 of the focusing carrier 321 forms an annular winding slot 3214, wherein the focusing coil 322 is wound around the winding slot 3214 of the focusing carrier 321 to ensure that the focusing coil 322 is fixedly disposed on the outer bearing side 3211 of the focusing carrier 321.

In other embodiments, the outer bearing side 3211 of the focusing carrier 321 is formed with a plurality of protrusions for surrounding the focusing coil 322, and the focusing coil 322 is symmetrically disposed at the side.

It should be noted that the assembly mode of the focusing magnet 323 and the frame 324 is not limited in the optical assembly of the present invention, for example, the focusing magnet 323 may be adhered to the inner wall of the frame 324, so that the focusing magnet 323 is fixedly disposed on the frame 324. In the specific embodiment of the optical assembly shown in fig. 1 to 5, the frame 324 includes at least one fitting groove 3241, wherein the focusing magnet 323 is fitted into the fitting groove 3241 of the frame 324 to fixedly dispose the focusing magnet 323 inside the fitting groove 3241 of the frame 324.

In some embodiments, the second lens barrel 211 and the focusing carrier 321 may be in the same structure, the second lens group 222 is directly fixed inside the focusing carrier 321, that is, the second lens group 222 is directly disposed on the inner side 3212 of the focusing carrier 321, so as to directly form the second lens portion 22, and the number of the second lens groups 222 may be plural or one. By this design, the second lens group 222 is directly fixed inside the focusing carrier 321 to form the second lens portion 22, which not only ensures the integrity of the optical system, but also simplifies the structural design of the driving assembly and achieves miniaturization of the whole structure.

Further, the focusing part 32 further includes a holding member 325 for movably holding the focusing carrier 321 to the frame 324. Referring to fig. 4 to 5, the holder 325 may include at least one elastic member, more specifically, the holder 325 includes an upper elastic member 3251 and a lower elastic member 3252, wherein the upper elastic member 3251 is fixed to an upper surface of the focusing part 32, the upper elastic member 3251 is fixed to an upper surface of the frame 324, that is, the upper elastic member 3251 is disposed at an incident side of the second lens part 22, the lower elastic member 3252 is fixed to a lower surface of the focusing part 32, and the lower elastic member 3252 is fixed to a lower surface of the frame 324, that is, the lower elastic member 3252 is disposed at an emergent side of the second lens part 22. As such, the upper and lower elastic members 3251 and 3252 cooperate with the focus carrier 321 to allow the second lens portion 22 to be floatingly held inside the frame 324. The upper elastic member 3251 and the lower elastic member 3252 are integrally formed in a sheet shape, and the upper elastic member 3251 and the lower elastic member 3252 keep the focus carrier 321 inside the frame 324, so that the upper and lower elastic members not only can keep the focus carrier 321 in the frame 324, but also can provide a restoring force by using their own elasticity, that is, after the focus carrier 321 moves along the optical axis to focus along the second lens portion 22 under the action of the driving force, the retaining member 325 can use its own elastic force to make the focus carrier 321 restore to the initial position.

Further, the focusing part 32 further includes a focusing circuit 327, the focusing circuit 327 is mutually connected with a circuit on the frame 324 to ensure circuit connection of the focusing part 32, wherein the focusing circuit 326 is formed inside the focusing carrier 321 through an injection molding process, a circuit interface of the focusing circuit 326 is reserved on the surface of the focusing carrier 321, and the focusing coil 322 is electrically connected with the frame 324 through the focusing circuit 326, so as to form a working circuit of the focusing part 32, so that the focusing part 32 is ensured to provide a focusing driving force for the second lens part 22 after being electrified.

It should be noted that, in the embodiment of the present application, the focusing portion 32 further includes a focusing sensor 326, which is mainly used for sensing the position of the focusing carrier 321, and focusing according to the shooting requirement to obtain a clearly imaged picture. The focusing sensor 326 includes an IC controller 3261 and a position sensor 3262, and the IC controller is mainly configured to control the current in the focusing coil 322, including the magnitude and direction of the current, according to the position information monitored by the position sensor 3262, so as to adjust the position of the focusing carrier 321.

The optical anti-shake unit 33 includes an optical anti-shake carrier 331, at least one optical anti-shake coil 332, and at least one optical anti-shake magnet 333, where the optical anti-shake unit 33 is mainly used for realizing an anti-shake effect in a shooting process to drive the second lens unit 22 to move along a direction perpendicular to the optical axis, and specifically, in the present application, the direction perpendicular to the optical axis mainly refers to the X-direction and the Y-direction.

In some embodiments, the focusing carrier 321 is accommodated inside the optical anti-shake carrier 331, the optical anti-shake carrier 331 has a mounting position of the optical anti-shake magnet 333 thereon, and the optical anti-shake magnet 333 is fixed on the mounting position formed by the optical anti-shake carrier 331.

In some embodiments, the optical anti-shake carrier 331 is in a square ring shape, the optical anti-shake magnets 333 may be four and symmetrically disposed on the optical anti-shake carrier 331, and the optical anti-shake coils 332 are disposed below the optical anti-shake magnets 333 and in one-to-one correspondence with the optical anti-shake magnets 333 for providing an optical anti-shake driving force.

The optical anti-shake unit 33 further includes at least one optical anti-shake sensing element 334, which is mainly used for sensing the position of the optical anti-shake carrier 331, wherein the second lens unit 22 is accommodated in the optical anti-shake carrier 331, and the second lens unit 22 moves along with the movement of the optical anti-shake carrier 331, so as to adjust the position of the second lens unit 22 in the horizontal direction perpendicular to the optical axis, so as to realize shake correction during shooting.

The optical anti-shake sensing element 334 includes an X-direction sensor 3341 and a Y-direction sensor 3342, wherein the X-direction sensor 3341 and the Y-direction sensor 3342 are used for monitoring the position of the optical anti-shake carrier 331 so as to feed back the position information to a driving device control center, and the driving device control center controls the current in the optical anti-shake coil 332, including the magnitude and direction of the current, according to the fed-back position information, so as to adjust the position of the optical anti-shake carrier 331.

It should be noted that, in the embodiment of the present application, the focusing portion 32 and the optical anti-shake portion 33 share the same magnet pair, that is, the optical anti-shake magnet 333 and the focusing magnet 323 are the same magnet pair, and meanwhile, the frame 324 of the focusing portion 32 and the optical anti-shake carrier 331 are the same structure, that is, the focusing coil 322 is disposed on the focusing carrier 321 and is located inside the frame 324, the focusing magnet 323 is disposed on the frame 324, and is implemented as a common magnet for focusing and optical anti-shake, and the optical anti-shake coil 332 is disposed at a position corresponding to the focusing magnet 322. And, the common magnet is matched with other components of the focusing part 32 and the optical anti-shake part 33 at the same time by increasing the height of the common magnet of the focusing part 32 and the optical anti-shake part 33 so as to drive the second lens part 22 to move along the optical axis and the direction perpendicular to the optical axis. Thus, structural members are reduced, the structure is compact, the size of the optical component is reduced, and miniaturization is achieved.

By reasonably designing the driving device 30, the focusing part 32 for driving the second lens part 22 and the optical anti-shake part 33 for driving the second lens part 22 share part of driving components, so that the internal space of the driving device 30 is fully utilized, and the height dimension of the optical component is reduced.

In other embodiments of the present application, the common magnet of the focusing part 32 and the optical anti-shake part 33 may be combined with other components of the focusing part 32 and the optical anti-shake part 33 to drive the second lens part 22 to move in other manners, which is not limited by the present application.

The optical anti-shake coil 332 is located at a position corresponding to the optical anti-shake magnet 333, in some embodiments, the optical anti-shake coil 332 is disposed below the optical anti-shake magnet 333 and on the lower surface of the optical anti-shake carrier 331, and the optical anti-shake coil 332 is located in the magnetic field of the optical anti-shake magnet 333, and when the optical anti-shake coil 332 is energized, a sufficient driving force is provided for the second lens portion 22 to realize anti-shake with a large stroke.

To realize the circuit conduction of the optical anti-shake unit 33 during operation, so as to provide a driving force for the optical anti-shake carrier 331 to move along the X/Y direction, the optical anti-shake driving unit 33 further includes an optical anti-shake circuit 335, and the optical anti-shake circuit 335 is mainly used for conducting the optical anti-shake coil 332 and providing a current required by the optical anti-shake sensing element 334 during operation.

Referring to fig. 1 to 8, in order to make the installation of the driving device 30 and the third lens portion 23 more stable, the present application further provides the base 34 adapted to the third lens portion 23, wherein the base 34 includes a base main body 341, a base support post 342 disposed on the base main body 341, and a supporting portion 343. The base support post 342 integrally extends upward along a corner region of the base body 341 such that the base support post 342 forms a mounting surface having a height difference with the surface of the base body 341. The number of the base support columns 342 is at least two, and preferably, the base support columns 342 are symmetrically disposed to the base main body 341 and fixed to the base main body 341. In the embodiment of the present application, the base support posts 342 are located at four corners of the base body 341, integrally extend upward along four corner regions of the base body 341, and are symmetrically distributed.

The base 34 surrounds the third lens portion 23, a peripheral area of the base body 341 of the base 34 extends downward to form an annular structure, and the supporting portion 343 is the supporting portion 343, and the supporting portion 343 and the base body 341 form a mounting position for mounting the third lens portion 23. Specifically, the lower surface of the base body 341 and the inner surface of the supporting portion 343 form the mounting position against which the third barrel 231 of the third lens section 23 is supported by the base 34.

In some embodiments, the specific forming manner of the base pillar 342 and the supporting portion 343 is not limited to the present application, and the base pillar 342 and the supporting portion 343 may be integrally formed with the base body 341 through an injection molding process, or may be further formed on the formed base body 341 through an injection molding process.

The optical anti-shake coil 332 is disposed on the base 34, and more specifically, the optical anti-shake coil 332 includes an X-direction anti-shake coil and a Y-direction anti-shake coil, and is disposed on the base body 341 opposite to the optical anti-shake magnet 334.

The optical anti-shake coils 332 are disposed on the upper surface of the base 34, and device mounting positions are disposed on the upper surface of the base 34 along the periphery of the light-passing holes, where the devices may be position sensors, coils or circuit boards, in the present application, the optical anti-shake coils 332 are disposed on the base 34 and uniformly disposed around the light-passing holes of the base 34, the number of the optical anti-shake coils may be plural, in a specific embodiment, the number of the optical anti-shake coils 332 may be four, and the number of the optical anti-shake coils is consistent with the number of the optical anti-shake magnets 333 in the present application. After the optical anti-shake coil 332 is fixed to the base 34, an optical anti-shake magnet 333 is correspondingly disposed above the optical anti-shake coil 332, where the optical anti-shake magnet 333 is fixedly disposed on the frame 324, and a lower surface formed by the optical anti-shake magnet 333 after being fixedly mounted is parallel to an upper surface formed by the optical anti-shake coil 332.

In other embodiments, the third lens barrel 231 of the third lens unit 23 may be integrally formed with the base 34, that is, the third lens group 232 is directly disposed on the mounting position of the base 34.

In some embodiments, the third lens group 232 of the third lens group 23 protrudes from the third lens barrel 231, and after the third lens group 23 is fixed to the base body 341, the top of the third lens group 23 is kept flush with the upper end surface of the base 34, i.e. a certain gap is reserved between the second lens group 22 and the third lens group 23. In some embodiments, the base 34 is extended along the upper surface thereof, the extended surface is a horizontal surface, the extended surface can be used for mounting the housing 31 of the driving device, the housing 31 can also be used as a mounting bearing surface of the first lens portion 21, and the horizontal surface from which the base extends is horizontally contacted with the housing 31 of the driving device, so that the flatness of the mounting of the driving structure can be ensured.

Meanwhile, an optical anti-shake sensing element mounting groove 3412 is formed in the upper surface of the base body 341 of the base 34, and the optical anti-shake sensing element mounting groove 3412 is formed in the base 34 in such a manner as to be recessed therein, and a groove-like structure is formed in the base 34 to receive the optical anti-shake sensing element 334 therein. And the sensing element 334 is conducted with an optical anti-shake circuit 335 embedded inside the base 34 to supply the optical anti-shake sensing element 334 with a current required for operation.

The optical anti-shake sensing element mounting groove 3412 includes an X-direction mounting groove and a Y-direction mounting groove, which are respectively located at two adjacent sides of the base body 341, and the optical anti-shake coils 332 are located on the upper surface of the base 34, and the number of the optical anti-shake coils 332 is plural.

In order to make the optical anti-shake section 33 move more smoothly in a plane perpendicular to the optical axis, in some embodiments, the driving apparatus 30 further includes a guide support structure 35 for improving stability of movement during optical anti-shake. The guide support structure 35 is disposed between the optical anti-shake carrier 331 and the base 34. More specifically, the guide support structure 35 is disposed between the optical anti-shake carrier 331 and the base body 341, so that the guide support structure 35 can always support and guide the optical anti-shake carrier 331 during movement of the optical anti-shake carrier 331 relative to the base 34, so that the optical anti-shake carrier 331 can move smoothly.

The guide support structure 35 is disposed between the base 34 and the optical anti-shake carrier 331, so that the base 34 always maintains movable contact with the optical anti-shake carrier 331 through the guide support structure 35. When the optical anti-shake coil 332 is energized, the optical anti-shake coil 332 interacts with the optical anti-shake magnet 333 to drive the optical anti-shake carrier 331 to move along the X-axis direction and the Y-axis direction.

In the embodiment referring to fig. 7, the guide support structure 35 is implemented as a mechanism having a track-ball structure, and the guide support structure 35 includes a track disposed between the optical anti-shake carrier 331 and the base 34, and balls 351 disposed in the track. Since the balls are disposed in the limit area, the movement track of the balls is limited in the track, and the balls can slide or roll in the limit area according to a preset movement mode, so that the parallelism of the optical anti-shake portion 33 during movement can be ensured while friction force of the optical anti-shake portion 33 during movement is reduced.

The balls 351 include at least two balls 351, preferably 3 or more balls 351 are disposed at corner positions or side positions of the base 34, a first limiting region 3311 is extended or recessed downward from the bottom of the optical anti-shake carrier 331, a second limiting region 3411 is extended or recessed upward from the base body 341 of the base 34, and the first limiting region 3311 and the second limiting region 3411 form a receiving position for receiving the balls 351 to limit the balls in a space formed by the two to assist movement of the anti-shake carrier 331. Also, in the embodiment of the present application, the shape of the track is not limited to the present application, and may be implemented as a cross shape, a rectangle, or the like. It should be appreciated that the shape of the track guides the movement of the optical anti-shake carrier 331 with the second lens portion 22, and in some embodiments the stop region is implemented to include a track extending along the X-axis and/or extending along the Y-axis.

In some embodiments, the driving device 30 further includes a stabilizer 36, where the stabilizer 36 may be a magnetically conductive member 361, where the magnetically conductive member 361 is disposed in the base body 341 of the base 34 and is located directly below the optical anti-shake magnet 333, and where the magnetically conductive member 361 may be a sheet iron that generates an attractive force with the optical anti-shake magnet 333 fixed on the optical anti-shake carrier 331, so that the optical anti-shake portion 33 and the base 34 remain relatively stable to assist the movement of the optical anti-shake carrier 331.

In some embodiments, the number of the magnetic conductive members 361 is 4, the number of the optical anti-shake coils 332, the number of the optical anti-shake magnets 333, and the number of the magnetic conductive members 361 are identical, and the optical anti-shake magnets 333 are disposed along four sides of the optical anti-shake carrier 331.

The forming manner of the magnetic conductive member 361 is not limited to the present application, in some embodiments, the magnetic conductive member 361 is integrally formed with the base body 341 of the base 34 through an insert molding process, and the magnetic conductive member 361 may be fixed to the base body 341 of the base 34 through an adhesive, so that the magnetic conductive member 361 can be opposite to the magnet 333.

The driving device 30 further includes an electrical connection member 37, wherein the electrical connection member 37 is disposed on the base 34 and is electrically connected to the holder 325, so as to provide an operation circuit connection for the focusing coil 322 and the optical anti-shake coil 332 through the electrical connection member 37 and the holder 325.

Referring to one embodiment of fig. 1 to 5, the electrical connection member 37 includes an upper end 371, a middle 372, and a lower end 373. The upper end 371, the middle 372, and the lower end 373 are in communication with each other.

The middle part 372 of the electric connection member 37 is disposed in the base body 341, the upper end 371 of the electric connection member 37 integrally extends upward from the base body 341 along the base pillar 342, and the lower end 373 of the electric connection member 37 extends downward from the base body 341 to be electrically connected to a circuit element outside the driving device 30. The middle portion 372 of the electrical connection member 37 includes a plurality of electrical connection elements, at least one of the plurality of electrical connection elements of the middle portion 372 of the electrical connection member 37 integrally extending upwardly to the top end of the base support post 342 to form an upper end 371 of the electrical connection member 37; at least one of the plurality of electrical connection elements of the middle portion 372 of the electrical connection member 37 integrally extends downward to the bottom end of the support portion 343 of the base 34 to form a lower end 373 of the electrical connection member 37.

The manner of forming the electrical connection member 37 is not limited to the present application, and in one embodiment of the present application, the electrical connection member 37 is integrally formed on the base 34 through an insert molding process, that is, the middle portion 372 of the electrical connection member 37 is integrally formed in the base main body 341, the upper end portion 371 of the electrical connection member 37 is integrally formed on the base pillar 342, and the lower end portion 373 of the electrical connection member 37 extends downward from the base main body 341, or may be integrally formed on the supporting portion 343 and extends to the bottom of the supporting portion 343 to expose an electrical contact point. In other embodiments, the electrical connection member 37 is formed on the surface of the base body 341 by attaching, the outer peripheral side of the supporting portion 343 forms a flexible board structure, and the lower end 373 is disposed in the flexible board structure to implement flexible electrical connection.

Further, the middle portion 372 of the electrical connection member 37 includes circuitry for focusing and anti-shake. The focusing coil 322 is electrically connected to the upper end 371 of the electrical connection member 37 through the upper elastic element 3251 or the lower elastic element 3252, the optical anti-shake coil 332 is electrically connected to the middle 372 of the electrical connection member 37, more specifically, the focusing coil 322 is electrically connected to the upper elastic element 3251 or the lower elastic element 3252 through the focusing circuit 327, the upper elastic element 3251 or the lower elastic element 3252 is electrically connected to the middle 372 of the electrical connection member 37, the optical anti-shake coil 332 is electrically connected to the optical anti-shake circuit 335, and the optical anti-shake circuit 335 is electrically connected to the middle 372 of the electrical connection member 37.

Specifically, the upper elastic member 3251 or the lower elastic member 3252 for turning on the focus coil 332 includes a focus elastic portion 32511 and an anti-shake elastic portion 32512, and the focus elastic portion 32511 and the anti-shake elastic portion 32512 extend on a plane perpendicular to the optical axis. The focusing elastic part 32511 is positioned at the inner circumference of the anti-shake elastic part 32512, the inner side of the focusing elastic part 32511 extends to and is fixed to the upper surface of the focusing carrier 321, the outer side of the focusing elastic part 32511 extends to and is fixed to the upper surface of the frame 324, the inner side of the anti-shake elastic part 32512 extends to and is fixed to the upper surface of the frame 324, and the outer side of the anti-shake elastic part 32512 extends to and is fixed to the upper surface of the base support 342 of the base 34. The driving device 30 is adapted to drive the focusing carrier 321 to move along the direction set by the optical axis relative to the frame 324 for optical focusing, and the driving device 30 is adapted to drive the frame 324 to drive the focusing carrier 324 carrying the optical lens to move in a plane perpendicular to the optical axis for optical anti-shake.

When the driving device 30 drives the focus carrier 321 to move in a direction set by the optical axis (i.e., the Z-axis direction), the focus elastic portion 32511 deforms to accumulate elastic force; when the driving means 30 stops driving, the elastic force of the focusing elastic part 32511 is released, driving the focusing carrier 321 to return to the original position. When the driving device 30 drives the frame 324 to move in the X-axis direction and the Y-axis direction in a plane perpendicular to the optical axis, the anti-shake elastic portion 32512 deforms to accumulate elastic force; when the driving device 30 stops driving, the elastic force of the anti-shake elastic portion 32511 is released, and the frame 324 is driven to return to the original position.

The second lens part 22 is disposed in the driving device 30, and the second lens part 22 can move along the optical axis to achieve focusing or move along a plane perpendicular to the optical axis to achieve optical anti-shake, so as to achieve better image quality, in the optical design, the optical sensitivity of the second lens part 22 is higher than that of other lens parts, wherein the second lens part 22 comprises an optical area and a structural area, and in one specific embodiment, the size of the boundary of the optical area and the optical axis of the second lens part 22 is smaller than that of the optical area and the optical axis of the first lens part 21, and the size of the boundary of the optical area and the optical axis of the second lens part 22 is smaller than that of the optical area and the optical axis of the third lens part 23.

The third lens 23 is disposed at the mounting position of the base 34, wherein the number of the third lens groups 232 is plural, and in the present application, the number of the third lens groups 232 is 3 or more.

Further, the first lens portion 21 and the second lens portion 22 are provided with a first gap therebetween in the direction along the optical axis, and the second lens portion 22 and the third lens portion 23 are provided with a second gap therebetween in the direction along the optical axis.

More specifically, the lower end surface of the bearing portion 312 of the housing 31 and the bottom of the first lens portion 21 form an upper top surface of the accommodating space 313, the upper end surface of the focusing carrier 321 and the top of the second lens portion 22 form an upper moving end surface of the movable portion, and the upper top surface of the accommodating space 313 and the upper moving end surface of the movable portion form the first gap.

The upper end surface of the base body 341 and the top of the third lens portion 23 form a lower bottom surface of the accommodating space 313, the lower end surface of the focusing carrier 321 and the bottom of the second lens portion 22 form the lower moving end surface of the movable portion, and the lower bottom surface of the accommodating space 313 and the lower moving end surface of the movable portion form the second gap.

The first gap is used for the second lens part 22 to move upward along the optical axis, and the second gap is used for the second lens part 22 to move downward along the optical axis.

The main body 311 of the housing 31 forms a peripheral side surface of the accommodation space 313, and an outer peripheral side surface of the optical anti-shake carrier 331 and the peripheral side surface of the accommodation space 313 form the third gap for horizontally moving the optical anti-shake carrier 331 in a direction perpendicular to the optical axis.

The peripheral side surface of the optical anti-shake carrier 331 and the base support 342 form the fourth gap, and the fourth gap defines a travel distance of the optical anti-shake carrier 331 along a horizontal movement perpendicular to the optical axis.

The third gap and the fourth gap are used for the optical anti-shake carrier 331 to move in a horizontal direction perpendicular to the optical axis, that is, a horizontal gap between the housing 31 and the optical anti-shake carrier 331 is greater than a travel distance of the optical anti-shake carrier 331 to move in the horizontal direction perpendicular to the optical axis.

The movable part formed by the focusing part 32, the optical anti-shake part 33 and the second lens part 22 is accommodated in the accommodating space 313 of the housing 31, and the second lens part 22 moves along the optical axis direction or along the direction perpendicular to the optical axis under the action of the driving force in the accommodating space 313, so as to realize the optical focusing and the optical anti-shake functions of the camera module.

The housing 31 provides a bearing surface for the first lens portion 21 to hold the first lens portion 21 above the second lens portion 22, and on the other hand, the housing 31 and the base 34 form an accommodating space to define a travel space for movement of the focusing portion 32 and the optical anti-shake mechanism 33.

In summary, a specific structure of an optical assembly according to an embodiment of the present application is illustrated, wherein the optical assembly solves the contradiction between insufficient driving force of the driving device 30 and increased motor size by driving the second lens portion 22 of the split type optical lens 20 to move. By driving the second lens portion 22 to move, focusing and anti-shake in the shooting process are realized by using one driving device 30, so that the internal space of the driving device can be effectively utilized, and the height dimension of the whole optical assembly can be reduced.

Example Camera Module

According to the second aspect of the present application, as shown in fig. 9 to 10, the optical assembly is combined with a photosensitive assembly 40 to form an image capturing module, the photosensitive assembly 40 includes at least one circuit board 41, at least one photosensitive chip 42, and a filter element 43, the photosensitive chip 42 is mounted on and electrically connected to the circuit board 41, and the filter element 43 is held on a photosensitive path of the photosensitive chip 42. The optical assembly is held in the photosensitive path of the photosensitive assembly 40 such that light entering the optical assembly passes through the optical assembly to reach the photosensitive chip 42 of the photosensitive assembly 40, thereby achieving imaging.

The circuit board 41 may be used as a substrate of the photosensitive assembly 40 for carrying other parts of the photosensitive assembly 40. The circuit board 41 may have a first surface 411 and a second surface 412 opposite to the first surface 411, where the first surface 411 faces the object side and the second surface 422 faces the object side. The wiring board 41 includes a wiring board main body, a connection tape, and a connector portion (wherein the connection tape and the connector portion are not shown in the drawing). The connection strap portion is connected between the circuit board main body and the connector portion to achieve electrical conduction between the circuit board main body and the connector portion, the connector being for connection with an external device.

The photo chip 42 may be a photo coupling element (CCD) or a complementary metal oxide semiconductor element (COMS). And the photosensitive chip 42 may include a photosensitive region at the center and a non-photosensitive region surrounding the photosensitive region. The photosensitive area of the photosensitive chip 42 may receive light via an optical system including the first lens part 21, the second lens part 22, and the third lens part 23, and have a photosensitive path corresponding to the photosensitive area.

The photosensitive chip 42 may be disposed on the first surface 411 of the circuit board 41. Specifically, the photosensitive chip 42 may be mounted on a central area of the first surface 411 of the circuit board 41.

The specific embodiment of the photosensitive chip 42 electrically connected to the circuit board 41 is not limited by the present application. For example, the photosensitive Chip 42 may be electrically connected to the circuit board body of the circuit board 41 by wire bonding (wire bonding), soldering, flip-Chip (FC), rewiring layer (RDL, redistribution Layer), or the like. For example, the electrical connection may be implemented as wire bonding. After the photosensitive chip 42 is mounted on the circuit board 41, one end of a gold wire is connected to the photosensitive chip 42 by a gold wire bonding process, and the other end is connected to the circuit board 41. The connection lines may also be of other types, such as silver lines, copper lines, etc.

In some embodiments, the circuit board 41 has a mounting groove that accommodates the photosensitive chip 42, and the shape of the mounting groove corresponds to the shape of the photosensitive chip 42. Illustratively, the depth of the mounting slot may be equal to the thickness of the circuit board 41. The photosensitive assembly 40 may further include a reinforcing plate 46, and when the thickness of the photosensitive chip 42 is less than or equal to the thickness of the circuit board 41, the photosensitive chip 42 may be completely inserted into the mounting groove of the circuit board 41, and the reinforcing plate 46, such as a steel plate, may be further disposed on the second surface 411 of the circuit board 41 for reinforcing the strength of the circuit board 41.

In other embodiments, the depth of the mounting groove may be smaller than the thickness of the circuit board 41, and the photosensitive chip 42 may protrude from the first surface 411 of the circuit board 41 when the photosensitive chip 42 is embedded in the mounting groove. Likewise, the reinforcing plate 46, such as a steel plate, may be further provided on the second surface 412 of the circuit board 41 for reinforcing the strength of the circuit board 41.

By arranging the mounting groove matched with the photosensitive chip 42 on the circuit board 41, the volume and weight of the photosensitive assembly 40 can be reduced as a whole, which is beneficial to reducing the height of the photosensitive assembly 40 and realizing miniaturization of the whole structure.

The filter element 43 is held on the photosensitive path of the photosensitive chip 42 for filtering the imaging light entering the photosensitive chip 42. In some embodiments, the photosensitive assembly 40 further includes a support 44 for supporting and retaining the filter element 43. The filter element 43 is mounted on the bracket 44 and corresponds to at least a portion of the photosensitive area of the photosensitive chip 42 to be held on the photosensitive path of the photosensitive chip 42.

The manner of combining the bracket 44 and the circuit board 41 is not limited by the present application. The bracket 44 may be formed separately to form a structure independent of the circuit board 41, and the filter element bracket 44 may be attached to the circuit board 41 by an adhesive, and may be used to support other components. In other embodiments, the filter element holder 44 and the circuit board 41 are integrally formed at a predetermined position of the circuit board body through a molding process. The photosensitive assembly 40 further includes at least one electronic component 45, and the electronic component 45 is disposed on the circuit board 41 and electrically connected to the circuit board 41. The electronic component 45 may be disposed on the first surface 411 of the circuit board 41 and spaced from the photosensitive chip 42. Specifically, the electronic component 45 may be mounted on an edge area of the first surface 411 of the circuit board 41 and spaced apart from the photosensitive chip 42 by a certain distance. The electronic components 45 may be implemented, for example, as capacitors, resistors, driving devices, etc.

The bracket 44 is disposed on the first surface 411 of the circuit board 41, and has a stepped light-transmitting hole, where the stepped light-transmitting hole corresponds to the light-sensing path of the light-sensing chip 42. The stepped light-passing hole may have at least two cavities having different diameters, and the cavity farthest from the photosensitive chip 42 may be the first cavity.

In one embodiment, the bracket 44 may have a top surface parallel to the first surface 411 of the circuit board 41, and the cavity of the stepped light-passing hole near the photosensitive chip 42 may have an inclined inner side. Illustratively, the support 44 may be disposed at an edge region of the first surface 41 of the circuit board 41 and not overlap with the photosensitive chip 42. Alternatively, the stand 44 may be disposed at an edge region of the first surface 411 of the circuit board 41 and overlap with a non-photosensitive region of the photosensitive chip 42.

The bracket 44 integrally forms the connecting wire connecting the circuit board 41 and the photosensitive chip inside the bracket through a molding process, so that the traditional color filter element bracket can be replaced while protecting a gold wire, the weight of the camera module can be reduced, and the height of the camera module can be reduced.

In some embodiments, the bracket 44 encapsulates the electronic component 45 and the connection wires and is formed integrally with the circuit board 41 by a molding process. In other words, the electronic component 45 may be encapsulated inside the bracket 44. Illustratively, the integral body formed by the bracket 44 and the circuit board 41 may further include a non-photosensitive region of the photosensitive chip 42. The electronic component 45 is encapsulated between the bracket 44 and the circuit board 41, so that the electronic component 45 can be effectively protected.

The color filter 43 may be disposed in the first cavity of the stepped light-passing hole, and the thickness of the color filter 43 on the optical axis is less than or equal to the height of the first cavity of the stepped light-passing hole on the optical axis, and a space is formed between the color filter 43 and the photosensitive chip 42. When the thickness of the color filter element 43 is smaller than or equal to the height of the first cavity of the stepped light-passing hole on the optical axis, the color filter element 43 and the top surface of the bracket 44 may be located in a plane or recessed relative to the top surface of the bracket 44. This helps to reduce the overall height of the photosensitive assembly 40 and thus the overall height of the camera module. In addition, the support 44 is adopted to support the color filter element 43, so that an independently arranged mounting seat of the color filter element 43 can be omitted, the volume and weight of the photosensitive assembly 40 can be reduced as a whole, the anti-shake control accuracy of the photosensitive assembly 40 is facilitated, and the formed image pickup module achieves miniaturization of the whole structure.

The application provides a large-chip image pickup module structure, as shown in fig. 10, which comprises the module housing 10, an optical lens 20, a driving device 30 and a photosensitive assembly 40, wherein the optical lens is a split optical lens and comprises a first lens part 21, a second lens part 22 and a third lens part 23, and in the imaging process of an optical system, the positions of the first lens part 21 and the third lens part 23 are in a fixed state, and the second lens part 22 is in an adjustable state.

Further, the driving device 30 is fixedly connected with the second lens portion 22, and under the action of the driving device 30, the second lens portion 22 can move along the direction of the optical axis and the direction perpendicular to the optical axis during the working process, so as to realize the focusing and anti-shake functions during the shooting process.

The camera module further includes a photosensitive assembly 40, the photosensitive assembly 40 is disposed under the driving device 30, and the center of the optical axis of the driving device 30 is consistent with the center of the photosensitive assembly 40, and the photosensitive assembly 40 mainly receives the light passing through the optical system to form a captured image.

Further, the photosensitive component 40 is formed by a molding process, the non-photosensitive area of the photosensitive chip 42, the electronic component 45 and the connecting lines between the two are molded inside the bracket 44 formed by the molding process, and the mounting seat structure of the color filter element 43 is formed on the mounting seat structure, and the strength of the circuit board is increased by the reinforcing plate 46 arranged at the bottom of the circuit board 41, so that the flatness of the large chip in the scheme is ensured, and the stability of the overall structure is ensured while the height of the overall photosensitive component 40 is reduced.

In some embodiments, as shown in fig. 10, the camera module further includes a module housing 10, the module housing 10 accommodates the above-mentioned components in a space formed between the camera module and the photosensitive assembly 40, the upper surface of the module housing 10 has an opening, the opening accommodates the first lens portion 21 therein, the light entrance aperture of the first lens portion 21 is consistent with the center of the opening, and the lower surface of the module housing 10 is adhered and fixed to the edge of the circuit board of the photosensitive assembly 40, so as to better protect the internal components and ensure the stability of the overall structure.

The size of the built-in photosensitive chip 42 of the camera module structure provided by the application can exceed one inch, so that the imaging quality of the camera module can be better improved. Meanwhile, the technical scheme of focusing inside the optical lens 20 is that part of the lens part is driven to move so as to realize focusing and anti-shake functions in the shooting process, so that the anti-shake and focusing scheme of the large-size photosensitive chip is provided while the miniaturization of the whole structure is ensured. Meanwhile, shooting and anti-shake are realized by utilizing the driving part lens, other lens parts keep a fixed effect in the shooting process, and the fixed part lens can be utilized for correcting the position of the movable lens part in real time so as to obtain a more accurate optical imaging system, and meanwhile, the simplification of the assembly process and the improvement of the assembly precision are ensured.

Particularly, compared with a conventional camera module provided with a large chip, the camera module structure for driving part of lens groups in the split optical lens to move so as to realize focusing and shake correction can solve the contradiction between increasing motor driving force and increasing motor size, and is miniaturized.

Method for assembling optical component

According to another aspect of the present application, the present application further provides an assembling method of an optical assembly, i.e. a driving device and an optical lens, wherein the assembling method comprises the following steps:

(a) Providing an optical lens 20, wherein the optical lens 20 comprises a first lens part 21, a second lens part 22 and a third lens part 23 which are sequentially arranged from an object side to an image side along the optical axis direction;

(b) The third lens part 23 is fixedly arranged with the fixing part of the optical assembly;

(c) Pre-positioning the first lens portion 21 along the optical axis of said third lens portion 23;

(d) Assembling and calibrating the first lens part 21, the second lens part 22 and the third lens part 23 to form a clearly imaged optical lens 20;

(e) The first lens portion 21 is fixed to the fixed portion, and the second lens portion 22 is fixed to a movable portion of an optical module.

In one embodiment, the optical assembly includes an optical lens 20 and a driving device 30, wherein the movable portion of the optical assembly includes a focusing carrier 321 of the driving device 30, and the fixed portion of the optical assembly includes a housing 31 and a base 34. The optical lens 20 includes a first lens portion 21, a second lens portion 22, and a third lens portion 23, the relative positions of the first lens portion 21 and the third lens portion 23 are respectively defined by a housing 31 and a base 34 of the driving device 30, and the second lens portion 22 is carried by a focusing carrier 321 inside the driving device 30 and is kept at a certain distance from the first lens portion 21 and the third lens portion 23.

In a specific embodiment, said step (d) of the method of assembling an optical assembly, assembling and calibrating said first lens portion, said second lens portion, and said third lens portion, comprises:

correcting a Z-direction gap of the first lens part by taking the third lens part and the second lens part as references;

It should be noted that the relationship between the lens portions of the optical lens 20 is: (1) The Z-direction gap mainly affects the curvature of field of the optical lens 20; (2) The position in the XY direction mainly affects the peak value of the optical lens 20; (3) Tilting between lens groups mainly affects tilting and astigmatism of the optical lens 20, etc.

In some embodiments, the method of assembling the first lens portion 21, the second lens portion 22, and the third lens portion 23 includes: first, the gap in the Z direction of the second lens portion 21 is calibrated based on the third lens portion 23, second, the gap in the Z direction of the first lens portion 21 is calibrated based on the third lens portion 23 and the second lens portion 22, third, the position in the XY direction of the second lens portion 22 is corrected based on the third lens portion 23, and finally, the position in the XY direction of the first lens portion is corrected based on the third lens portion 23 and the second lens portion 22.

Therefore, in the optical design of the optical lens 20, it is necessary to consider the sensitivity of the overall optical performance of the optical lens 20 in a balanced manner, that is, it is not necessary to cause that a specific lens or a specific lens portion is too sensitive due to the influence of the relationship between the lens portions, which tends to cause the problem that the overall optical performance of the optical lens 20 is degraded due to the higher sensitivity of the lens or the lens group. However, due to the different roles and powers of the lenses, there is always a tendency for the lens group to have a sensitivity that is lower to higher, i.e., the second lens portion 22 has a sensitivity that is higher than that of the third lens portion 23, and the first lens portion 21 has a sensitivity that is higher than that of the second lens portion 22. Therefore, in the assembling method of the present invention, after calibrating the gaps in the Z direction of the lens groups, the positions of the lens groups in the XY direction need to be calibrated sequentially from low sensitivity to high sensitivity, so that the overall optical performance of the optical lens 20 is ensured.

In the optical lens 20 of the present application, in order to facilitate the assembly of the process and improve the imaging quality of the optical lens, the first lens portion 21 includes a plurality of first lens groups 211, and in one embodiment, the number of first lens groups 212 is 5; the second lens portion 22 includes at least one second lens group 222, and in one embodiment, 1 second lens group; the number of the third lens portions 23 is plural, and in one embodiment, the number of the third lens groups 232 is 2.

It should be noted that, in order to facilitate adjustment of the second lens portion 22, the side edge of the second lens portion 22 has a clamping portion 2221, which is formed by integrally extending outwards along the side edge of the second lens group 222, and the number of the clamping portions 2221 is plural, in a specific embodiment, as shown in fig. 11, the number of the clamping portions 2221 is 2, which are symmetrically disposed along the second lens group 222 and extend into the space of the avoidance slot 3122 formed by the housing 31, so that the position of the second lens group 222 is adjusted by the space of the avoidance slot 3122, so as to meet the requirement of optical imaging.

According to another aspect of the present invention, the present invention further provides an assembling method of each lens portion of the optical lens 20 and the driving device 30, wherein the assembling method comprises the steps of:

(A) Providing the housing 31, wherein the housing 31 has an accommodating space, a top opening 3121 and a bottom opening communicating with the accommodating space, respectively;

(B) Disposing the focusing portion 32 and the optical anti-shake portion 33, which are assembled with the second lens portion 22, inside the housing 31 through the bottom opening of the housing 31, so as to allow the second lens portion 22 to be movably held in the accommodation space of the housing 31 in correspondence with the top opening 3121 of the housing 31; and

(C) The third lens portion 23 is fixedly disposed on the base 34 through the bottom opening of the housing 31, and is attached to the first lens portion 21 on the housing 31 to obtain the optical lens 20, wherein the first lens portion 21, the second lens portion 22, and the third lens portion 23 are sequentially disposed along the optical axis of the optical lens 20.

In one embodiment, in the step (C), first, the first lens portion 21 is pre-fixed to the housing 31; secondly, the first lens part 21, the second lens part 22 and the third lens part 23 are calibrated; again, the first lens portion 21 and the housing 31 are fixed.

In a specific embodiment, in the step (B), when the focusing part 32 of the driving device 30 is provided with the second lens part 22, that is, when the single lens is provided, the upper surface of the focusing carrier 321 is higher than the upper surface of the optical anti-shake part carrier 331, the second lens part 22 is inserted through the position of the avoidance groove 313 reserved on the driving device housing 31, and the second lens part 22 is inserted into the focusing part carrier 321 for preassembling through the space reserved by the avoidance groove 313.

Preferably, in the step (C), the focusing part carrier 321 of the focusing part 32 of the driving device 50 surrounds the outer side of the third lens part 23, so that the position of the third lens part 23 on the base can be avoided, so that the movable space of the second lens part 23 is reserved, the fixed connection of the third lens part 23 is ensured, and the height dimension of the optical lens 20 is reduced, so that the height dimension of the optical assembly is reduced.

The optical lens 20 is preassembled according to the above steps, and after the optical system is capable of imaging and detecting, the first lens portion 21 and the third lens portion 23 are fixedly connected with the driving device 30 through a fixing medium, wherein the fixing medium may be glue or other chemical substances with viscosity; and moving the second lens unit 22, i.e. the second lens unit 22, wherein the moving direction is a plurality of degrees of freedom, such as rotation, translation, tilting, etc. in the X/Y/Z direction, and when the optical lens 20 formed by the second lens unit 222 and the first lens unit 21, the third lens unit 23 can meet the imaging requirement, the second lens unit 222 can be fixed.

In the process of moving the second lens unit 22, the avoidance groove 3122 reserved on the driving device housing 31 is mainly used for adjustment, that is, the position of the avoidance groove 3122 is provided with a clamping device, the clamping device clamps the second lens unit 222 along different directions, and when the second lens unit 222 and the first lens unit 21 and the third lens unit 23 meet the imaging requirement parameters, the second lens unit 222 can be fixed, so that the second lens unit 222, the first lens unit 21 and the third lens unit 23 form the imaging optical lens 20.

Further, on the upper surface of the driving device base 34, a horizontal mounting surface of a driving device housing 31 is provided, the third lens part 23 is fixed inside a third lens mounting hole 355 reserved in the driving device base 34 and is fixed with the driving device base 34, the focusing part 32 and the optical anti-shake part 33 of the driving device 30 are provided on the upper surface of the third lens part 23 again, and are accommodated in the housing by using an accommodating space 313 on the housing 31, and the opening 3121 on the housing, the light-transmitting hole on the focusing part carrier 321 and the mounting hole of the third lens part 23 are kept consistent, and then the second lens part 22 and the first lens part 21 are respectively preassembled by a clamping device; that is, the second lens portion 22 is shot on the focusing portion carrier 321 through the avoiding groove 3122 reserved on the motor housing 31, the first lens portion 21 is disposed on the opening 3122 of the driving device housing 31, and after correction, imaging is performed, the group lenses are fixed.

Further, as shown in fig. 12, the second lens portion 22 is mounted in the carrier of the focusing portion 32, wherein the clamping portion 2221 on the side of the second lens portion 22 extends into the avoiding groove 3122 reserved on the housing 31. The position of the second lens portion 22 is correspondingly adjusted through the space reserved by the avoidance groove 3122, and when the position meets the imaging requirement, the second lens portion is fixed on the focusing portion carrier 321 through processes such as dispensing.

According to the method for assembling the optical lens 20 and the driving device 30 provided by the application, the positions of the first lens part 21 and the second lens part 22 are synchronously adjusted by taking the fixed third lens part 23 as a reference of the optical axis, according to the influence of the sensitivity of the optical lens, the first lens part 21 with higher sensitivity is firstly fixed on the shell 31 of the driving device 30, then the position of the second lens part 22 with lower sensitivity is adjusted, finally the second lens part 22 can be fixed on the focusing carrier 321 of the driving device 30 after clear imaging, and finally the optical assembly is formed. By the assembly method, the accuracy of the assembled optical component can be ensured while the assembly process flow is simplified.

The foregoing has outlined the basic principles, features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A method of assembling an optical assembly, comprising:

2. The method of assembling of claim 1, wherein in step (d), assembling and calibrating the first lens portion, the second lens portion, and the third lens portion comprises:

3. The method of assembly of claim 1, wherein step (e) comprises:

fixing the first lens part and the fixing part;

4. A method of assembling as claimed in claim 2 or claim 3, wherein in step (b), the fixing portion comprises a base, the base comprises a base body and a supporting portion, the supporting portion and the base body form a mounting location for the annular structure extending downwardly from a peripheral region of the base body, and the third lens portion is fixed to the mounting location.

5. The assembly method according to claim 4, wherein the fixing portion further comprises a housing, the housing includes a main body and a bearing portion, the main body is hollow and annular, and an upper end face near the object side extends inwards to form the bearing portion.

6. The assembly method according to claim 5, wherein in the step (c), the bearing portion of the first lens portion, which is intended to be assembled on the housing, is held above the second lens portion.

7. The assembly method according to claim 6, wherein the movable portion includes an optical anti-shake portion, the second lens portion is predetermined to be assembled to the movable portion, and the optical anti-shake portion drives the second lens portion to be movable in a direction perpendicular to the optical axis with respect to the first lens portion and the third lens portion.

8. The assembly method of claim 7, wherein the body and the bearing portion form a receiving space, the second lens portion being disposed in the receiving space, the second lens portion moving in the receiving space along a direction perpendicular to the optical axis.

9. The assembly method according to claim 8, wherein the bearing portion of the housing is provided with an escape groove, and the second lens portion is clamped and adjusted by the escape groove.

10. The method of assembling of claim 9, wherein the second lens group includes a clamping portion integrally extending outwardly along a side of the second lens portion and into a space of the recess formed in the housing to clamp the clamping portion through the recess to adjust the position of the second lens portion.