WO2022127735A1

WO2022127735A1 - Camera module, manufacturing method and mobile terminal

Info

Publication number: WO2022127735A1
Application number: PCT/CN2021/137441
Authority: WO
Inventors: 刘佳; 何艳宁; 袁栋立; 魏罕钢; 刘冰玉; 卞强龙
Original assignee: 宁波舜宇光电信息有限公司
Priority date: 2020-12-18
Filing date: 2021-12-13
Publication date: 2022-06-23
Also published as: CN116648901A; CN114650323A

Abstract

Provided in the present application are a camera module, a manufacturing method and a mobile terminal. The camera module comprises: a photosensitive assembly; a first lens structure, a second lens structure and a third lens structure, which are sequentially arranged along an optical axis from an object side to an image side and on a photosensitive path of the photosensitive assembly; a focusing assembly, which comprises a driving portion fixedly connected to the second lens structure; and a fixed frame, which is fixedly connected to the third lens structure and defines the driving portion to move in the direction of the optical axis. The camera module provided in the present application can reduce the overall height of the camera module, thereby facilitating the lightness and thinning of the camera module.

Description

Camera module, manufacturing method and mobile terminal

technical field

The present application relates to the technical field of optical devices, and more particularly, to a camera module, a manufacturing method, and a mobile terminal.

Background technique

In recent years, electronic mobile terminals, such as mobile phones, are gradually developing towards the direction of thinness and high performance. The thinning and lightness of mobile phones will help improve the user's handheld experience. Therefore, mobile phone manufacturers also put forward corresponding requirements for the camera module, which is one of the standard configurations of mobile phones.

In order to meet users' requirements for imaging quality, camera modules usually need to have multiple functions such as high pixels, long focal length, large aperture, auto focus, and anti-shake. The integration of these functions often leads to an increase in the size of the camera module, especially the Increase the height of the camera module.

The height increase and the thinning of the mobile phone due to the improved function of the camera module will cause the assembled camera module to protrude from the body casing of the mobile phone and form a boss on the back side of the mobile phone. This will make the mobile phone in a tilted and unstable state when placed on a desktop or other surface, affecting the user's operating experience. More importantly, the camera module protrudes from the body casing of the mobile phone, which will cause the camera module or the protective cover outside the camera module to have a great risk of damage. The generation of cracks will affect the imaging of the camera module.

SUMMARY OF THE INVENTION

The present application provides a camera module, a manufacturing method and a mobile terminal that can at least partially solve the above technical problems.

In one aspect of the present application, a camera module is provided. The camera module includes: a photosensitive assembly; a first lens structure, a second lens structure and a third lens structure are sequentially arranged on the photosensitive path of the photosensitive assembly and along the optical axis from the object side to the image side; the focusing assembly includes: The driving part is fixedly connected with the second lens structure; the fixed frame is fixedly connected with the third lens structure and restricts the driving part to move along the direction of the optical axis.

In one embodiment, the driving part is provided with at least one first magnetic structure, and is provided with at least one first ball groove parallel to the optical axis; the fixed frame is provided with at least one first coil structure and at least one second ball groove, Wherein, the position of the first coil structure corresponds to the position of the first magnetic structure, and the position of the first ball groove corresponds to the position of the second ball groove; and the focusing assembly further includes: located in the first ball groove and the second ball groove a plurality of first balls in between.

In one embodiment, the camera module further includes an anti-shake component, including: a movable part, which is fixedly connected to the photosensitive component; a fixed part, which is fixedly connected to the third lens structure and defines the movable part on a plane perpendicular to the optical axis. move.

In one embodiment, the movable part is provided with at least one second magnetic structure, and is provided with a plurality of third ball grooves perpendicular to the optical axis; the fixed part is provided with at least one second coil structure and at least one fourth ball groove , wherein the position of the second coil structure corresponds to the position of the second magnetic structure, the position of the fourth ball groove corresponds to the position of the third ball groove; and the anti-shake assembly further comprises: located in the third ball groove and the fourth ball groove A plurality of second balls between the ball grooves.

In one embodiment, the camera module further includes: an installation housing for accommodating the first lens structure, the second lens structure and the third lens structure, and fixedly connected with the first lens structure and the third lens structure.

In one embodiment, the photosensitive component includes: a circuit board with a first surface; a photosensitive element, disposed on the first surface of the circuit board and having a photosensitive path; an electronic component, disposed on the first surface of the circuit board, and connected to the first surface of the circuit board The photosensitive elements are arranged at intervals; the molding seat is arranged on the first surface of the circuit board, and has stepped light-passing holes corresponding to the light-sensing paths, the stepped light-passing holes include a first cavity away from the light-sensitive element; and color filters The color filter is arranged in the first cavity, and the thickness of the color filter on the optical axis is less than or equal to the height of the first cavity on the optical axis.

In one embodiment, the circuit board has a mounting groove for accommodating the photosensitive element, wherein the shape of the mounting groove corresponds to the shape of the photosensitive element.

In one embodiment, a reinforcing plate is provided on the second surface of the circuit board opposite to the first surface, and the reinforcing plate is fixed to the second surface of the circuit board.

In one embodiment, the depth of the mounting groove is less than or equal to the thickness of the circuit board.

In one embodiment, the electronic components are encapsulated by a molded seat.

In one embodiment, the mounting housing accommodates the photosensitive assembly, the movable portion is fixedly connected to the top surface of the photosensitive assembly, and the outer periphery of the fixed portion is fixedly connected to the inner side of the upper edge of the mounting housing.

In one embodiment, the first lens structure includes at least one lens including: a first lens farthest from the photosensitive component; and an object side surface of the first lens is a plane.

In one embodiment, the image side surface of the first lens is concave.

Another aspect of the present application provides a method for manufacturing a camera module. The method includes: arranging a third lens structure on the object side of the photosensitive component along the optical axis; arranging a focusing component on the object side of the third lens structure, wherein the focusing component includes a driving part and a fixed frame, and the fixed frame is connected with the first lens structure. The three-lens structure is fixedly connected, and the driving part is limited to move along the direction of the optical axis; a second lens structure is arranged on the object side of the third lens structure, wherein the second lens structure is fixedly connected with the driving part; Set the first lens structure on the object side

In one embodiment, using machine vision and active alignment technology, the sub-optical axis of the first lens structure, the sub-optical axis of the second lens structure, and the sub-optical axis of the third lens structure are made to coincide.

In one embodiment, the method further includes: disposing an anti-shake assembly on the periphery of the photosensitive assembly, wherein the anti-shake assembly includes a movable part and a fixed part, the movable part is fixedly connected to the photosensitive assembly, and the fixed part is connected to the third The lens structure is fixedly connected and defines the movable part to move on a plane perpendicular to the optical axis.

Another aspect of the present application also provides a mobile terminal. The mobile terminal includes a camera module as described in any of the above embodiments; and a body casing, a camera module is disposed inside, including a mounting hole matched with a photosensitive path of the camera module.

In one embodiment, the object side surface of the first lens farthest from the photosensitive component in the at least one lens of the first lens structure and the outer surface of the body casing are in the same plane.

The camera module provided by the embodiment of the present application utilizes the internal focus of the camera module to ensure imaging quality. In this way, not only the overall height of the camera module can be reduced, but also the compactness of each lens structure can be ensured, which is beneficial to the lightening and thinning of the camera module. Meanwhile, setting the anti-shake assembly can further improve the imaging quality of the camera module, and the photosensitive assembly provided by the embodiments of the present application can reduce its overall volume and weight, thereby ensuring the anti-shake control accuracy of the photosensitive assembly. In addition, by limiting the installation housing of the camera module and the installation positions of other structures, the overall installation flatness of the camera module can be effectively ensured.

Description of drawings

Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

Fig. 1 is the assembly structure schematic diagram of the existing camera module;

2 is a schematic cross-sectional view of a camera module according to an embodiment of the present application;

3 is a schematic cross-sectional view of a photosensitive assembly according to an embodiment of the present application;

FIG. 4 is an assembly schematic diagram of a driving part according to an embodiment of the present application;

5 is a schematic structural diagram of a fixed frame according to an embodiment of the present application;

6 is a schematic structural diagram of an anti-shake assembly according to an embodiment of the present application;

7 is an assembled plan view of the movable portion according to the embodiment of the present application;

FIG. 8 is an assembly schematic diagram of a camera module according to an embodiment of the present application;

9 is a flowchart of a method for manufacturing a camera module according to an embodiment of the present application;

10 is an assembly schematic diagram of a lens module according to an embodiment of the present application;

FIG. 11 is a schematic structural diagram of a mobile terminal according to an embodiment of the present application; and

FIG. 12 is a left side view of the mobile terminal of FIG. 11 .

Detailed ways

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of the present application and are not intended to limit the scope of the present application in any way.

The terminology used herein is for the purpose of describing particular example embodiments and is not intended to be limiting. When used in this specification, the terms "comprising", "comprising", "including" and/or "comprising" indicate the presence of stated features, integers, elements, parts and/or combinations thereof, but do not exclude The presence of one or more other features, integers, elements, components and/or combinations thereof.

This document is described with reference to schematic illustrations of exemplary embodiments. The exemplary embodiments disclosed herein are not to be construed as limited to the specific shapes and dimensions shown, but are to include various equivalent structures capable of performing the same function, as well as deviations in shape and dimensions resulting, for example, in manufacture. The locations shown in the figures are schematic in nature and are not intended to limit the location of the various components.

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 to which this disclosure belongs. Terms such as those defined in commonly used dictionaries should be construed to have meanings consistent with their meanings in the context of the relevant art, and are not to be construed in an idealized or overly formal sense unless explicitly defined as such herein.

In order to improve the imaging quality of the camera module, the existing camera module usually adopts a driving motor such as a voice coil motor, so that the camera module has the functions of focusing and anti-shake.

FIG. 1 is a schematic diagram of an assembly structure of a conventional camera module 100 . As shown in FIG. 1 , the conventional camera module 100 includes a lens assembly 110 , a driving motor 120 and a photosensitive assembly 130 .

The driving motor 120 may have a driving unit and a fixing unit (not shown). The driving unit is fixedly connected with the lens assembly 110. By moving the driving unit in different directions relative to the fixing unit, the lens assembly 110 fixedly connected with the driving unit can be made to move. The relative movement occurs, thereby realizing the focusing and anti-shake functions of the camera module 100 .

Generally speaking, when the camera module 100 is installed on a mobile terminal such as a mobile phone, a glass cover plate 101 needs to be provided above the lens assembly 110 away from the photosensitive assembly 130 to protect the internal structure of the camera module 100 . And a movable space for the lens assembly 110 needs to be reserved between the lens assembly 110 and the glass cover 101 . That is to say, there is a movable space for the lens assembly 110 with a height H1 between the lens assembly 110 and the glass cover, so as to realize the focusing function of the camera module. Therefore, the installation height of the camera module 100 in the mobile phone can be composed of the height H1 of the movable space, the height H2 of the driving motor 120 and the height H3 of the photosensitive element 130 .

When the existing camera module 100 is installed in a mobile phone, due to the thickness limitation of the mobile phone, the camera module 100 will protrude from the body casing of the mobile phone after being installed, such as the rear casing, thereby affecting the performance of the mobile phone.

The camera module of the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

FIG. 2 is a schematic cross-sectional structure diagram of a camera module 200 according to an embodiment of the present application. As shown in FIG. 2 , the camera module 200 may include: a first lens structure 210 , a second lens structure 220 , a third lens structure 230 , a photosensitive component 240 , a mounting housing 250 , a focusing component 260 and an anti-shake component 270 .

At least one lens in the first lens structure 210 , at least one lens in the second lens structure 220 , and at least one lens in the third lens structure 230 can together form the optical system of the camera module 200 , and can be held in the photosensitive assembly 240 . on the photosensitive path. The imaging plane of the optical system may be located at the photosensitive component 240 .

The imaging light incident on the object side sequentially passes through the first lens structure 210 , the second lens structure 220 and the third lens structure 230 , and is then received by the photosensitive component 240 and photoelectrically converted to form an electrical signal related to the object image. For the optical system, the object side may be referred to as the object side, and the photosensitive component 240 side may be referred to as the image side.

The focusing assembly 260 can include a driving part 261 and a fixed frame 262, the driving part 261 is fixedly connected with the second lens structure, the fixed frame 262 can be fixedly connected with the third lens structure 230, and restricts the driving part 261 to move along the direction of the optical axis, The driving part 261 can cause the second lens structure 220 to be displaced relative to the first lens structure 210 and the third lens structure 230 in the direction of the optical axis, so as to realize the focusing function of the camera module 200 .

The embodiments of the present application provide a camera module that implements a focusing function inside a lens assembly. The camera module does not need to be provided with a movable space that needs to be reserved when the conventional drive motor structure is adopted, which is beneficial to reduce the overall height of the camera module and is beneficial to the lightness and thinness of the camera module.

The first lens structure 210 may include at least one lens, and the lens in the first lens structure may be made of optical plastic or optical glass. Exemplarily, the first lens structure 210 may include a first lens barrel, and the lenses in the first lens structure are connected to the first lens barrel by, for example, gluing, so as to carry and protect the lenses in the first lens structure.

In one embodiment, in at least one lens of the first lens structure 210, the object side of the first lens farthest from the photosensitive component 240 may be a plane, so that the first lens can be installed in contact with an external element such as a glass cover when installed Completely fit, which is beneficial to reduce the overall installation height of the camera module.

Exemplarily, the first lens structure 210 may include a plano-concave lens, and the object side of the plano-concave lens may be flat, and the image side may be concave. It should be understood that the first lens structure 210 may also be a single lens or a combination of multiple lenses in other forms. As long as the object side surface of the first lens farthest from the photosensitive assembly 240 is flat, a flat mounting plane can be provided for the external components.

Likewise, the second lens structure 220 may include at least one lens, for example, two lenses, and the lenses in the second lens structure 220 may be made of optical plastic or optical glass. Exemplarily, the second lens structure 220 may include a second lens barrel, and the lenses in the second lens structure 220 are connected to the second lens barrel by, for example, bonding, so as to carry and protect the lenses in the second lens structure.

The third lens structure 230 may include at least one lens, for example, three lenses, and the lenses in the third lens structure 230 may be made of optical plastic or optical glass. Exemplarily, the third lens structure 230 may include a third lens barrel, and the lenses in the third lens structure 230 are connected to the third lens barrel by, for example, gluing, so as to carry and protect the lenses in the third lens structure.

The lenses of the first lens structure 210 , the second lens structure 220 and the lenses of the third lens structure 230 can jointly constitute the optical system of the camera module 200 . Exemplarily, the first lens structure 210, the second lens structure 220, and the third lens structure 230 can be formed into a whole with sub-optical axes located on the same straight line by means of, for example, bonding, for receiving external image information, and converting the image The information is transmitted to the photosensitive element 240 .

FIG. 3 is a schematic cross-sectional structure diagram of a photosensitive assembly 240 according to an embodiment of the present application. As shown in FIG. 3 , the photosensitive component 240 may include a circuit board 241 , a photosensitive element 242 , an electronic component 243 , a molding seat 244 and a color filter 245 .

The circuit board 241 can be used as a substrate of the photosensitive assembly 240 for carrying other parts of the photosensitive assembly 240 . The circuit board 241 may have a first surface 2411 and a second surface 2412 opposite to the first surface 2411 .

The photosensitive element 242 may be disposed on the first surface 2411 of the circuit board 241 . Specifically, the photosensitive element 242 may be mounted on the central area of the first surface 2411 of the circuit board 241 . The photosensitive element 242 and the circuit board 241 may be electrically connected to an edge area surrounding the central area of the circuit board 241 through connection wires 246 .

Illustratively, the connecting wires 246 may be gold wires. After the photosensitive element 240 is mounted on the circuit board 241 , one end of the gold wire is connected to the photosensitive element 242 and the other end of the gold wire is connected to the circuit board 241 through a gold wire bonding process. It should be understood by those skilled in the art that the connecting wires 246 may also be of other types, such as silver wires, copper wires, and the like.

Illustratively, the photosensitive element 242 may be a photocoupler element (CCD) or a complementary metal oxide semiconductor element (COMS). And the photosensitive element 242 may include a photosensitive area at the center and a non-photosensitive area around the photosensitive area. The photosensitive area of the photosensitive element 242 can receive light passing through the optical system including the first lens structure 210 , the second lens structure 220 and the third lens structure 230 , and has a photosensitive path corresponding to the photosensitive area.

In one embodiment, the circuit board 241 has an installation groove for accommodating the photosensitive element 242 , and the shape of the installation groove corresponds to the shape of the photosensitive element 242 . Exemplarily, the depth of the mounting groove may be equal to the thickness of the circuit board 241 . When the thickness of the photosensitive element 242 is less than or equal to the thickness of the circuit board 241, the photosensitive element 242 can be completely embedded in the mounting groove of the circuit board 241, and a reinforcing plate, such as a steel plate, can also be provided on the second surface 2412 of the circuit board 241 , for enhancing the strength of the circuit board 241 .

As an option, the depth of the mounting groove may be smaller than the thickness of the circuit board 241 , and when the photosensitive element 242 is embedded in the mounting groove, the photosensitive element 242 may protrude from the first surface 2411 of the circuit board 241 (as shown in FIG. 3 ) . Similarly, a reinforcing plate, such as a steel plate, can also be provided on the second surface 2412 of the circuit board 241 to enhance the strength of the circuit board 241 .

The volume and weight of the photosensitive assembly 240 can be reduced as a whole by arranging the mounting grooves on the circuit board 241 to cooperate with the photosensitive element 242 , which is beneficial to the anti-shake control accuracy of the photosensitive assembly 240 . The specific structure and working principle are described in detail.

The electronic components 243 may be disposed on the first surface 2411 of the circuit board 241 and spaced apart from the photosensitive elements 242 . Specifically, the electronic component 243 can be mounted on the edge region of the first surface 2411 of the circuit board 241 and is spaced apart from the photosensitive element 242 by a certain distance. The electronic components 243 may be implemented, for example, as capacitors, resistors, drive devices, or the like.

The molding seat 244 can be disposed on the first surface 2411 of the circuit board 241 and has a stepped light-passing hole corresponding to the light-sensing path of the light-sensing element 242 . The stepped light-passing hole may have at least two cavities with different diameters, and the cavity farthest from the photosensitive element 242 may be the first cavity.

In one embodiment, the molding seat 244 may have a top surface parallel to the first surface 2411 of the circuit board 241, and the cavity of the stepped light hole close to the photosensitive element 242 may have an inclined inner side. Exemplarily, the molding seat 244 may be disposed on the edge region of the first surface 2411 of the circuit board 241 and not overlap with the photosensitive element 242 . As an option, the molding seat 244 may be disposed on the edge area of the first surface 2411 of the circuit board 241 and overlap with the non-photosensitive area of the photosensitive element 242 (as shown in FIG. 3 ).

In one embodiment, the molding seat 244 covers the electronic components 243 and the connecting wires 246 and is integrally formed with the circuit board 241 through a molding process. In other words, the electronic component 243 can be encapsulated inside the molding seat 244 . Exemplarily, the whole formed by the molding seat 244 and the circuit board 241 may further include a non-photosensitive area of the photosensitive element 242 . The electronic component 243 is encapsulated between the molding seat 244 and the circuit board 241 , which can effectively protect the electronic component 243 .

The color filter 245 can be arranged in the first cavity of the stepped light-pass hole, and the thickness of the color filter 245 on the optical axis is less than or equal to the height of the first cavity of the stepped light-pass hole on the optical axis, and the filter A space is formed between the color chip 245 and the photosensitive element 242 . When the thickness of the color filter 245 is less than or equal to the height of the first cavity of the stepped light-pass hole on the optical axis, the color filter 245 and the top surface of the molding seat 244 can be in the same plane, or relative to the mold The top surface of the plastic seat 244 is concave. This helps to reduce the overall height of the photosensitive component 240, thereby reducing the overall height of the camera module. In addition, the use of the molded seat 244 to support the color filter 245 can eliminate the independently provided color filter mounting seat, which can reduce the volume and weight of the photosensitive assembly 240 as a whole, which is beneficial to the anti-shake control accuracy of the photosensitive assembly 240 , and the specific structure and working principle of the anti-shake assembly 270 will be described in detail below.

Illustratively, the color filter 245 may be implemented as an infrared cut filter, a fully transparent spectral filter, and other color filters or combinations of multiple color filters.

Referring again to FIG. 2 , in one embodiment, the mounting housing 250 can accommodate the first lens structure, the second lens structure and the third lens structure, and the mounting housing 250 can communicate with the first lens structure 210 and the third lens structure 230 through, for example, The connection is fixed by means of gluing (not shown). When the mounting shell 250 is mounted on a mobile terminal such as a mobile phone, in the working state, the first lens structure 210 and the third lens structure 230 fixedly connected with the mounting shell 250 can remain in a static state.

The focusing assembly 260 may include a driving part 261 and a fixing frame 262 . The driving part 261 can be fixedly connected to the second lens structure 220 by means of, for example, bonding, threading and snapping. Specifically, the driving part 261 can be fixedly connected to the second lens barrel of the second lens structure 220 .

The fixing frame 262 may be fixedly connected with the mounting housing 250 through the third lens structure 230 (not shown). Generally speaking, when the mounting shell 250 is mounted on a mobile terminal such as a mobile phone, the fixing frame 262 fixedly connected with the mounting shell 250 can remain in a stationary state. In addition, the fixed frame 262 may define the driving part 261 to move in the direction of the optical axis.

Specifically, when the fixed frame 262 is fixed, the driving part 261 can move a small distance relative to the fixed frame 262 along the sub-optical axis of the second lens structure 220 . Since the sub-optical axis of the first lens structure 210, the sub-optical axis of the second lens structure 220, and the sub-optical axis of the third lens structure 230 are coaxial, and since the first lens structure 210 and the third lens structure 230 are connected to the fixed frame 262 Fixed connection so as to remain fixed, the driving part 261 can drive the second lens structure 220 to move slightly along the optical axis relative to the first lens structure 210 and the third lens structure 230, so as to realize the fine adjustment of the position of the second lens structure 220, In this way, the camera module 200 can realize the focusing function in the camera module 200 while the first lens structure 210 is kept in a fixed state, thereby effectively improving the quality of the generated image.

It should be understood that when the fixed frame 262 of the focusing assembly 260 is fixedly connected to the third lens structure 230, due to the limited movement of the driving part 261 by the fixed frame 262, the second lens structure 220 fixedly connected to the driving part 261 is also The relative displacement along the optical axis can be generated with the third lens structure 230 , so as to realize the focusing function of the camera module 200 .

In one embodiment, FIG. 4 is a schematic view of the assembly of the driving part 261 according to the embodiment of the present application. FIG. 5 is a schematic structural diagram of the mounting frame 262 according to an embodiment of the present application. As shown in FIG. 4 and FIG. 5 , the driving part 261 can be a rectangular parallelepiped having a central through structure, which can accommodate the second lens structure 220 and is fixedly connected with the second lens structure 220 . A first magnetic structure 2611 is disposed at the center portion of the opposite sides of the rectangular parallelepiped. On the two sides where the first magnetic structure 2611 is disposed, first ball grooves 2612 are symmetrically disposed on both sides of the first magnetic structure 2611 , and the first ball grooves 2612 are spaced apart from the first magnetic structure 2611 . In addition, the extending direction of the first ball groove 2612 is parallel to the optical axis direction of the second lens structure 220 . In other words, the extending direction of the first ball groove 2612 is parallel to the optical axis direction.

The fixed frame 262 can be used for accommodating the driving part 261 , and a first coil structure 2621 and a second ball groove 2622 are respectively provided on two side surfaces corresponding to the driving part 261 .

A plurality of first balls 263 may be disposed in the space formed between the first ball groove 2612 and the second ball groove 2622, and the size of the first ball 263 may be matched with the size of the first ball groove 2612 and the second ball groove 2622 .

When the first coil structure 2621 applies current, according to the principle of electromagnetic induction, due to the magnetic force between the first coil structure 2621 and the first magnetic structure 2611, the first magnetic structure 2611 and the first coil structure 2621 move relative to each other. Specifically, when the electromagnetic force induced by the current applied by the first coil structure 2621 attracts the first magnetic structure 2611 , the fixing frame 262 provided with the first coil structure 2621 is fixed. Therefore, the driving part 261 provided with the first magnetic structure 2611 moves along the optical axis along the first ball groove 2612 and the second ball groove 2622 and the plurality of first balls 263 matched therewith. Therefore, the second lens structure 220 fixedly connected with the driving part 261 can be moved along the direction of the optical axis, and since the first lens structure 210 and the third lens structure 230 are fixed, the second lens structure 220 can be moved The relative position of 220 relative to the first lens structure 210 and the third lens structure 230 along the optical axis direction changes, and the focusing of the camera module 200 can be achieved by adjusting the relative positions of the respective lens structures.

Through the cooperation of the coil and the magnetic structure and the cooperation of the ball and the ball groove, the focusing function in the camera module 200 can be realized, and the principle is simple, easy to implement, and beneficial to cost saving. In addition, the balls and ball grooves cooperate to reduce friction and improve the sensitivity when focusing.

It should be understood by those skilled in the art that the specific structural form and implementation manner of the driving part and the fixed frame are not limited to this, and other forms can also be used to cause the driving part and the fixed frame to move relative to each other in a defined direction. The present application enables an optical system composed of a plurality of lens structures to realize the internal focusing function, which is beneficial to reduce the overall installation height of the camera module, and is beneficial to the lightness and thinness of the camera module. Referring to FIG. 2 again, in one embodiment, the anti-shake component 270 can adjust the displacement of the photosensitive component 240 according to the shaking of the camera module 200 , thereby compensating for the shaking image of the camera module 200 . The anti-shake assembly 270 includes a movable part 271 and a fixed part 272 . The movable part 271 may be fixedly connected with the photosensitive component 240 by means of, for example, bonding.

The fixing portion 272 can be fixedly connected to the mounting housing 250 through the third lens structure 230 . Generally speaking, when the mounting shell 250 is mounted on a mobile terminal such as a mobile phone, the fixing portion 272 fixedly connected with the mounting shell 250 can remain in a stationary state. And the fixed part 272 can limit the movable part 271 to move on a plane perpendicular to the optical axis.

Specifically, when the fixed part 272 is fixed, the movable part 271 can move a minute distance relative to the fixed part 272 on a plane perpendicular to the optical axis. Since the fixed portion 240 is fixedly connected to the mounting housing 250 and remains fixed, the movable portion 271 can drive the photosensitive assembly 240 to move slightly along the direction perpendicular to the optical axis, thereby realizing the anti-shake function of the camera module 200 .

It should be understood that when the fixed portion 272 of the anti-shake assembly 270 is fixedly connected to the third lens structure 230, due to the limited movement of the movable portion 271 by the fixed portion 272, the photosensitive assembly 240 fixedly connected to the movable portion 271 The relative displacement on the plane perpendicular to the optical axis can also be generated with the optical system including the third lens structure 230 , so as to realize the anti-shake function of the camera module 200 .

By moving the photosensitive assembly 240 as a whole on a plane perpendicular to the optical axis, the circuit board 241 and the photosensitive element 242 of the photosensitive assembly 240 can be moved synchronously, thereby effectively protecting the line connection between the two and ensuring the current in the working state. supply.

In one embodiment, FIG. 6 is a schematic structural diagram of an anti-shake assembly 270 according to an embodiment of the present application. FIG. 7 is an assembly plan view of the movable portion 271 according to the embodiment of the present application. As shown in FIG. 6 and FIG. 7 , the movable portion 271 may be a rectangular parallelepiped having a central through structure, and the central through structure may correspond to the photosensitive path of the photosensitive component 240 and be fixedly connected to the photosensitive component 240 . The bottom surface can be fixedly connected with the top surface of the molding seat 244 of the photosensitive component 240 . Second magnetic structures 2711 may be provided on two adjacent side surfaces of the movable portion 271 , and third ball grooves 2712 may be provided in four corner areas of the top surface of the movable portion 271 . When the movable part 271 is arranged perpendicular to the optical axis, the plane where the third ball groove 2712 is located may be perpendicular to the optical axis.

The fixed part 272 can be used for accommodating the movable part 271 , and at the positions of the fixed part 272 corresponding to the second magnetic structure 2711 and the third ball groove 2712 , a second coil structure 2721 and a fourth ball groove 2722 are respectively provided.

A plurality of second balls 273 may be disposed in spaces formed between the third ball grooves 2712 and the fourth ball grooves 2722 , and the sizes of the second balls 273 may be matched with the third ball grooves 2712 and the fourth ball grooves 2722 .

When the second coil structure 2721 applies current, according to the principle of electromagnetic induction, due to the magnetic force between the second coil structure 2721 and the second magnetic structure 2711, the second magnetic structure 2711 moves relative to the second coil structure 2721. Specifically, when the electromagnetic force induced by the current applied by the second coil structure 2721 in the direction parallel to the x-axis attracts or repels the second magnetic structure 2711, the fixing portion 272 provided with the second coil structure 2721 is The movable portion 271 is fixed, and thus the movable portion 271 provided with the second magnetic structure 2711 can drive the photosensitive element 240 to move along the y-axis direction. When the electromagnetic force induced by the current applied by the second coil structure 2721 parallel to the y-direction attracts or repels the second magnetic structure 2711 , the fixing portion 272 provided with the second coil structure 2721 is fixed. Therefore, the movable portion 272 provided with the second magnetic structure 2722 can drive the photosensitive element 240 to move along the x-axis direction. In this way, the movable part 272 can drive the photosensitive assembly 240 to move relatively on the xy plane. When the optical axis is in the z-axis direction, the anti-shake assembly 270 can make the photosensitive assembly 240 move in a direction perpendicular to the optical axis.

It should be understood by those skilled in the art that the specific structural forms and implementation manners of the movable portion and the fixed portion are not limited to this, and other forms can also be used to cause the movable portion and the fixed portion to move relative to each other in a defined direction. The present application realizes the anti-shake effect of the camera module by adjusting the relative position of the photosensitive assembly by using the anti-shake component, which can avoid the degradation of the imaging quality by adjusting multiple sets of lenses, and is beneficial to improve the imaging quality of the camera module.

In one embodiment, FIG. 8 is an assembly schematic diagram of the camera module 200 according to the embodiment of the present application. As shown in FIG. 8 , the mounting housing 250 can accommodate the photosensitive assembly 240 . The movable portion 271 is fixedly connected to the top surface of the photosensitive assembly 240 , and the outer periphery of the fixed portion 272 is fixedly connected to the inner side of the upper edge of the mounting housing 250 . This can not only effectively protect the photosensitive assembly 240 , but also ensure the flatness of the bottom of the camera module 200 . When the installation casing 250 is directly installed on the mobile terminal, the flatness of the overall structure of the camera module 200 after installation can be guaranteed.

FIG. 9 is a flowchart of a manufacturing method 1000 of a camera module according to an embodiment of the present application. As shown in FIG. 9, method 1000 includes steps as described below.

S101 , a third lens structure is arranged on the photosensitive path of the photosensitive component along the object side of the optical axis.

S102, a focusing assembly is provided on the object side of the third lens structure, the focusing assembly includes a driving part and a fixed frame, the fixed frame is fixedly connected with the third lens structure, and the driving part is limited to move along the direction of the optical axis.

S103, disposing a second lens structure on the object side of the third lens structure, wherein the second lens structure is fixedly connected with the driving part.

S104, setting the first lens structure on the object side of the second lens structure.

In one embodiment, FIG. 10 is a schematic assembly diagram of a camera module according to an embodiment of the present application. As shown in FIG. 10 , the third lens structure 230 , the second lens structure 220 , and the first lens structure 210 can be arranged in sequence on the on the photosensitive path of the photosensitive assembly (not shown). Specifically, the photosensitive assembly can be first set in the installation housing 250' and its position is relatively fixed, and then the third lens structure 230, the second lens structure 220 and the first lens structure 210 can be sequentially placed on the photosensitive path of the photosensitive assembly so that the sub-optical axes of the three are in the same straight line. With this assembling method, the stability of the overall structure can be ensured, and the lens assembly is accommodated in the mounting housing 250', which can ensure the compactness of each lens structure, thereby reducing the assembly height of the assembled camera module.

In another embodiment, a split assembly method can also be used, that is, the positions of the first lens structure, the second lens structure, and the third lens structure are relatively fixed, and the sub-optical axes of the three are in the same straight line. Exemplarily, after the second lens structure is assembled with the focusing assembly, the sub-optical axes of the first lens structure, the second lens structure assembled with the focusing assembly, and the third lens structure may be in the same straight line. After that, it is assembled with other structures of the camera module. Specifically, the sub-optical axes of the first to third lens structures can be in the same straight line by using machine vision and active alignment technology.

Exemplarily, the following steps may also be included: the first lens structure and the third lens structure are fixedly connected to the mounting housing, and the driving part is fixedly connected to the second lens structure.

In one embodiment, the method 1000 may further include: disposing an anti-shake component on the outer periphery of the photosensitive component. The anti-shake assembly includes a movable part and a fixed part, wherein the movable part is fixedly connected with the photosensitive assembly, and the fixed part is fixedly connected with the third lens structure and restricts the movable part to move on a plane perpendicular to the optical axis.

The camera module manufactured by the method 1000 realizes the focusing function by adjusting the relative distances between the respective lens structures in the optical system. In this way, the overall height of the camera module can be effectively reduced, which is beneficial to the lightening and thinning of the camera module.

FIG. 11 is a schematic structural diagram of a mobile terminal 20 according to an embodiment of the present application. FIG. 12 is a left side view of the mobile terminal 20 of FIG. 11 . As shown in FIG. 11 and FIG. 12 , the mobile terminal 20 includes a body casing 202 and at least one camera module 200, such as two, as described in any of the above embodiments. The camera module 200 may be disposed inside the body casing 202 , and the body casing 202 may have a mounting hole matching the photosensitive path of the camera module 200 .

In one embodiment, when the first lens structure includes the first lens, the object side of the first lens may be on the same plane as the outer surface of the body housing 202 . The mobile terminal 20 with the camera module 200 installed in this way can avoid the problem that the camera module 200 is too high to protrude from the body shell 202 of the mobile terminal 20, which is beneficial to improve the user's operating experience.

In one embodiment, the camera module 200 can also be applied to the side of the mobile terminal 20 with the display panel, which not only prevents the camera module from protruding from the body casing, but also ensures the imaging quality of the front camera module.

The above description is only a preferred embodiment of the present application and an illustration of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to the technical solution formed by the specific combination of the above-mentioned technical features, and should also cover the above-mentioned technical features without departing from the inventive concept. Other technical solutions formed by any combination of its equivalent features. For example, a technical solution is formed by replacing the above features with the technical features disclosed in this application (but not limited to) with similar functions.

Claims

The camera module is characterized in that it includes:

photosensitive components;

A first lens structure, a second lens structure and a third lens structure are arranged in sequence from the object side to the image side along the optical axis on the photosensitive path of the photosensitive component;

Focusing components, including:

a driving part, fixedly connected with the second lens structure;

The fixed frame is fixedly connected with the third lens structure, and defines the driving part to move along the direction of the optical axis.
The camera module according to claim 1, wherein,

The driving part is provided with at least one first magnetic structure, and is provided with at least one first ball groove parallel to the optical axis;

The fixed frame is provided with at least one first coil structure and at least one second ball groove, wherein the position of the first coil structure corresponds to the position of the first magnetic structure, and the position of the first ball groove corresponding to the position of the second ball groove; and

The focusing assembly further includes a plurality of first balls located between the first ball groove and the second ball groove.
camera module according to claim 1, is characterized in that, described camera module also comprises: anti-shake assembly, comprises:

a movable part, fixedly connected with the photosensitive component;

The fixed part is fixedly connected with the third lens structure, and defines the movable part to move on a plane perpendicular to the optical axis.
The camera module according to claim 3, wherein,

The movable part is provided with at least one second magnetic structure, and is provided with a plurality of third ball grooves perpendicular to the optical axis;

The fixed part is provided with at least one second coil structure and at least one fourth ball groove, wherein the position of the second coil structure corresponds to the position of the second magnetic structure, and the position of the fourth ball groove corresponding to the position of the third ball groove; and

The anti-shake assembly further includes a plurality of second balls located between the third ball groove and the fourth ball groove.
The camera module according to claim 1, wherein the camera module further comprises: a mounting shell for accommodating the first lens structure, the second lens structure and the third lens structure, And it is fixedly connected with the first lens structure and the third lens structure.
The camera module according to any one of claims 1 to 5, wherein the photosensitive component comprises:

a circuit board, having a first surface;

a photosensitive element, which is arranged on the first surface of the circuit board and has the photosensitive path;

an electronic component, which is arranged on the first surface of the circuit board and is arranged spaced apart from the photosensitive element;

a molding seat, disposed on the first surface of the circuit board, and having a stepped light-passing hole corresponding to the light-sensing path, the stepped light-passing hole including a first cavity away from the light-sensing element; as well as

The color filter is arranged in the first cavity, and the thickness of the color filter on the optical axis is less than or equal to the height of the first cavity on the optical axis.
The camera module according to claim 6, wherein the circuit board has an installation groove for accommodating the photosensitive element, wherein the shape of the installation groove corresponds to the shape of the photosensitive element.
The camera module according to claim 7, wherein a reinforcing plate is provided on the second surface of the circuit board opposite to the first surface, and the reinforcing plate is connected to the second surface of the circuit board. Two surfaces are fixed.
The camera module according to claim 7, wherein the depth of the installation groove is less than or equal to the thickness of the circuit board.
The camera module according to claim 6, wherein the electronic components are packaged by the molding seat.
The camera module according to claim 5, wherein the installation housing accommodates the photosensitive assembly, the movable part is fixedly connected to the top surface of the photosensitive assembly, and the outer periphery of the fixed part is connected to the photosensitive assembly. Install the inner fixed connection on the upper edge of the housing.
The camera module according to claim 1, wherein the at least one lens included in the first lens structure includes: a first lens farthest from the photosensitive component;

The object side surface of the first lens is a plane.
The camera module according to claim 12, wherein the image side surface of the first lens is concave.
The manufacturing method of the camera module, is characterized in that, comprises:

On the photosensitive path of the photosensitive component, a third lens structure is arranged along the optical axis;

A focusing assembly is provided on the object side of the third lens structure, wherein the focusing assembly includes a driving part and a fixed frame, the fixed frame is fixedly connected with the third lens structure, and defines the driving part along the move in the direction of the optical axis;

A second lens structure is provided on the object side of the third lens structure, wherein the second lens structure is fixedly connected with the driving part; and

A first lens structure is provided on the object side of the second lens structure.
The method of claim 14, further comprising:

Using machine vision and active alignment technology, the sub-optical axis of the first lens structure, the sub-optical axis of the second lens structure, and the sub-optical axis of the third lens structure are coincident.
The method of claim 14, further comprising:

An anti-shake assembly is arranged on the outer periphery of the photosensitive assembly, wherein the anti-shake assembly includes a movable part and a fixed part, the movable part is fixedly connected to the photosensitive assembly, and the fixed part is connected to the third lens The structure is fixedly connected and defines the movable part to move on a plane perpendicular to the optical axis.
A mobile terminal, characterized in that it includes:

The camera module of any one of claims 1 to 13; and

The casing of the body is provided with the camera module inside, and includes a mounting hole matched with the photosensitive path of the camera module.
The mobile terminal according to claim 17, wherein an object side surface of the first lens farthest from the photosensitive element in the at least one lens of the first lens structure and the outer surface of the body casing are on the same plane.