WO2022228300A1

WO2022228300A1 - Camera module and electronic device

Info

Publication number: WO2022228300A1
Application number: PCT/CN2022/088426
Authority: WO
Inventors: 杨泽; 朱林波
Original assignee: 维沃移动通信有限公司
Priority date: 2021-04-29
Filing date: 2022-04-22
Publication date: 2022-11-03
Also published as: CN113014788A

Abstract

The present application discloses a camera module and an electronic device, and belongs to the technical field of photography. The camera module comprises: a lens, a lens fixing component, a photosensitive component and a driving component; the lens fixing component comprises a housing and a base plate, the housing is disposed on the base plate, the housing is provided with a mounting hole, and the lens is mounted in the mounting hole; the lens, the housing and the base plate enclose to form a holding cavity, the photosensitive component is disposed in the holding cavity, the photosensitive component comprises a carrier and an image sensor, and the image sensor is disposed on the carrier; the driving component is used to drive the carrier to move in the holding cavity along the direction of the optical axis of the lens.

Description

Camera Modules and Electronic Equipment

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese Patent Application No. 202110475146.1 filed in China on Apr. 29, 2021, the entire contents of which are hereby incorporated by reference.

technical field

The application belongs to the field of camera technology, and specifically relates to a camera module and an electronic device.

Background technique

With the increasing demand for mobile phone camera functions in the market, the autofocus function, which is the most commonly used function when taking pictures, has become an essential option for mobile phone photography and video recording. The automatic focusing function of the existing camera is mainly realized by the voice coil motor driving the lens to move, so that the relative position between the lens and the sensor changes. However, the above driving method has at least the following defects: due to the heavy weight of the lens, the reliability of the movable lens is poor, and the impact with other structures is more serious in the process of falling.

SUMMARY OF THE INVENTION

The purpose of the embodiments of the present application is to provide a camera module and an electronic device, which can solve the problem that when a camera adopts a movable lens in the prior art, due to the heavy weight of the lens, the reliability of the movable lens is poor, and the Structural impact is a more serious problem.

In order to solve the above technical problems, this application is implemented as follows:

In a first aspect, an embodiment of the present application provides a camera module, where the camera module includes: a lens, a lens fixing component, a photosensitive component, and a driving component;

The lens fixing assembly includes a casing and a base plate, the casing is arranged on the base plate, the casing is provided with an installation hole, and the lens is installed in the installation hole;

An accommodating cavity is formed by enclosing the lens, the casing and the substrate, the photosensitive component is disposed in the accommodating cavity, the photosensitive component includes a carrier and an image sensor, and the image sensor is disposed in the accommodating cavity. on the carrier and facing the lens;

The driving component is used for driving the carrier to drive the image sensor to move in the accommodating cavity along the optical axis direction of the lens.

Optionally, the drive assembly includes a coil and a drive magnet, the drive magnet is disposed in the housing, the coil is disposed on the carrier, and the coil can be driven by the drive magnet when energized , so as to drive the carrier to move along the optical axis of the lens in the accommodating cavity.

Optionally, the photosensitive assembly further includes a first circuit board, the image sensor is disposed on one side of the first circuit board, and the image sensor is electrically connected to the first circuit board.

Optionally, the carrier is provided with a first stepped groove, and the first circuit board is installed in the first stepped groove.

Optionally, the camera module further includes a second circuit board, the second circuit board is a flexible circuit board, the second circuit board is disposed on the substrate, and the second circuit board is close to the substrate The outer edge region of the side surface of the first circuit board is connected to the substrate, and the side surface of the first circuit board away from the image sensor is connected to the central region of the side surface of the second circuit board away from the substrate.

Optionally, the camera module further includes a position sensing module and a sensing magnet, the position sensing module is disposed on the first circuit board, the sensing magnet is disposed in the housing, and is located on the carrier. During the process of driving the image sensor to move along the optical axis of the lens, the position sensing module determines the relative position between the image sensor and the lens by sensing changes in the magnetic field generated by the sensing magnet.

Optionally, the camera module further includes a controller, and the controller is configured to control the driving assembly according to the imaging result of the image sensor and the relative position between the image sensor and the lens.

Optionally, the photosensitive component further includes a filter, the filter is located between the image sensor and the lens, and the filter is perpendicular to the optical axis of the lens.

Optionally, the carrier is provided with a second stepped groove, and the optical filter is installed in the second stepped groove.

Optionally, the camera module further includes an elastic sheet, the elastic sheet is arranged in the housing, and when the carrier moves to a preset position along the optical axis of the lens in the direction of the lens, the elastic sheet is The carrier is abutted against the elastic piece.

In a second aspect, an embodiment of the present application provides an electronic device, where the electronic device includes the camera module described in the first aspect.

In the embodiment of the present application, by fixing the lens and moving the image sensor to realize auto-focusing, it is possible to reduce or even avoid collision with other structures in the process of falling, reduce driving power consumption, improve the imaging effect, and reduce the volume of the camera module And enhance the reliability of the camera module.

Description of drawings

1 is an exploded schematic diagram of a camera module provided by an embodiment of the present application;

FIG. 2 is a schematic connection diagram of a lens fixing assembly provided by an embodiment of the present application;

3 is a schematic diagram of the connection between the lens and the housing provided by the embodiment of the present application;

4 is a schematic structural diagram of a photosensitive assembly provided by an embodiment of the present application;

5 is a schematic top view of a first circuit board provided by an embodiment of the present application;

6 is a schematic structural diagram of a carrier provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a second circuit board provided by an embodiment of the present application;

8 is a schematic bottom view of a first circuit board provided by an embodiment of the present application;

FIG. 9 is a schematic diagram of the positions of the sensing magnet and the driving magnet according to the embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

The terms "first", "second" and the like in the description and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and distinguish between "first", "second", etc. The objects are usually of one type, and the number of objects is not limited. For example, the first object may be one or more than one. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the associated objects are in an "or" relationship.

The camera module and the electronic device provided by the embodiments of the present application will be described in detail below through specific embodiments and application scenarios with reference to the accompanying drawings.

Please refer to FIGS. 1 to 4. FIG. 1 is an exploded schematic diagram of a camera module provided by an embodiment of the present application, FIG. 2 is a schematic diagram of a connection of a lens fixing assembly provided by an embodiment of the present application, and FIG. 3 is provided by an embodiment of the present application. FIG. 4 is a schematic diagram of the structure of the photosensitive assembly provided by the embodiment of the present application. As shown in FIGS. 1 to 4 , the camera module in the embodiment of the present application includes a lens 11 , a lens fixing component, a photosensitive component, and a driving component, wherein the lens fixing component is used to fix the lens 11 , and the lens fixing component It includes a casing 121 and a base plate 122, the casing 121 is fixed on one side of the base plate 122, the casing 121 is provided with a mounting hole, and the lens 11 is installed in the mounting hole; A accommodating cavity is formed between them, and the photosensitive component is disposed in the accommodating cavity. The photosensitive component includes a carrier 131 and an image sensor 132. The image sensor 132 is fixed on the carrier 131, and the image sensor 132 It is arranged opposite to the lens 11, that is, the optical axis of the lens 11 is perpendicular to the photosensitive surface of the image sensor 132, so as to convert the received optical signal into an electrical signal; the driving component is used to drive the carrier 131 to drive the image fixed on it. The sensor 132 moves in the accommodating cavity along the optical axis direction of the lens 11, thereby changing the relative distance between the image sensor 132 and the lens 11, and realizing the automatic focusing function of the camera module.

Therefore, the embodiment of the present application realizes automatic focusing by fixing the lens and moving the image sensor, which can reduce or even avoid collision with other structures in the process of falling, and can also reduce the driving power consumption, improve the imaging effect, and reduce the volume of the camera module. And enhance the reliability of the camera module.

As shown in FIG. 3 , in some embodiments of the present application, the lens 11 is fixed to the housing 121 by glue 111 , which can reduce the secondary impact force when the lens 11 hits other components during the falling process of the camera module.

In some embodiments of the embodiments of the present application, the driving assembly includes a driving magnet 141 and a coil 142 , wherein the driving magnet 141 is fixedly arranged in the casing 121 , specifically, may be arranged on the inner wall of the casing 121 , and the coil 142 is fixedly arranged in the casing 121 . The carrier 131 can be wound around the outer wall of the carrier 131 , and the coil 142 is located in the surrounding area of the driving magnet 141 , and the central axis of the coil 142 coincides with the optical axis of the lens 11 . When the coil 142 is powered on, the coil 142 can be driven by the driving magnet 141 , thereby driving the carrier 131 fixed to the coil 142 to move along the optical axis of the lens 11 in the accommodating cavity to realize the carrier 131 Changes in the relative position between the image sensor 132 on the lens 11 and the lens 11 . Therefore, in the embodiment of the present application, the separate drive magnet 141 and coil 142 are used to replace the voice coil motor in the prior art, which can effectively reduce the volume occupied by the drive assembly, thereby reducing the volume of the camera module, and It is the image sensor 132 that needs to be driven, so the required driving force is small, so that the driving power consumption can be reduced.

Please refer to FIG. 5 , which is a schematic top view of a first circuit board according to an embodiment of the present application. As shown in FIG. 5 , in other embodiments of the present application, the photosensitive component further includes a first circuit board 133 , the image sensor 132 is disposed on the first circuit board 133 , and the image sensor 132 is connected to the first circuit board 133 . It is electrically connected to transmit and transfer the electrical signals generated by the image sensor 132 .

Please refer to FIG. 6 , which is a schematic structural diagram of a carrier provided by an embodiment of the present application. As shown in FIG. 6 , in some embodiments of the present application, a through hole is formed in the middle of the carrier 131 , a first stepped groove 1311 is formed on one end surface of the carrier 131 , and the first circuit board 133 is installed on the first side of the carrier 131 . in the stepped groove 1311. In this way, the light transmitted by the lens 11 is irradiated to the image sensor 131 on the first circuit board 133 through the through hole in the middle of the carrier 131 to realize light sensing.

In other embodiments of the present application, the photosensitive component further includes a filter 134, the filter 134 is located between the image sensor 132 and the lens 11, and the filter 134 is perpendicular to the optical axis of the lens 11. 134 is used to filter some specific light to improve image quality. As shown in FIG. 6 , optionally, the end surface of the carrier 131 with the first stepped groove 1311 is further provided with a second stepped groove 1312 , and the filter 134 is installed in the second stepped groove 1312 . Since the embodiment of the present application does not require a bracket for fixing the filter, and there is no step between the lens 11 and the image sensor 132, the height of the camera module can be reduced.

In some optional embodiments, the outer circumference of the carrier 131 is further provided with a coil winding slot 1313, and the coil winding slot 1313 is used for winding and fixing the coil 142; The coil 142 wound in the coil winding slot 1313 can be connected to a power source through the coil wiring stud 1314 .

Please refer to FIG. 7 and FIG. 8 , FIG. 7 is a schematic structural diagram of a second circuit board provided by an embodiment of the present application, and FIG. 8 is a schematic bottom view of a first circuit board provided by an embodiment of the present application. As shown in FIGS. 1-8 , in other embodiments of the present application, the camera module further includes a second circuit board 15 , the second circuit board 15 is a flexible circuit board, and the second circuit board 15 is disposed on the substrate 122 , and the second circuit board 15 is partially covered by the housing 121, that is, the second circuit board 15 is partially located in the accommodating cavity; in the part of the second circuit board 15 located in the accommodating cavity, close to The outer edge area of one side of the substrate 122 is fixedly connected to the substrate 122 , while the central area of one side close to the substrate 122 is not connected to the substrate 122 , and the side of the first circuit board 133 away from the image sensor 132 is away from the second circuit board 15 . The central area of the side surface of the substrate 122 (that is, the above-mentioned central area not connected to the substrate 122 ) is connected. Exemplarily, the side of the first circuit board 133 facing away from the image sensor 132 is provided with a circuit connection port 1331 . The first circuit board 133 is the The circuit connection port 1331 is connected to the central area of the second circuit board 15 in the accommodating cavity (ie, the black filled part in FIG. 7 ). Therefore, during the movement of the carrier 131 along the optical axis of the lens 11 in the accommodating cavity, when the carrier 131 moves away from the substrate 122, the first circuit board 133 fixed on the carrier 131 will move away from the substrate 122 synchronously. 133 is connected to the second circuit board 15, and since the second circuit board 15 is a flexible circuit board and has a certain degree of bending, the part of the second circuit board 15 connected to the first circuit board 133 will be pulled, providing an obstacle The resistance of the first circuit board 133 to move, when the coil 142 is powered off, the carrier 131 will be pulled back due to the restoring force of the second circuit board 15. In the above process, the second circuit board 15 is used as a return spring. .

Please refer to FIG. 9 . FIG. 9 is a schematic diagram of the positions of the sensing magnet and the driving magnet according to an embodiment of the present application. As shown in FIG. 9 , in some embodiments of the present application, the camera module further includes a position sensing module (not shown in the figure) and a sensing magnet 17 , and the position sensing module can be disposed in the first circuit On the board 133 , the sensing magnet 17 is arranged in the housing 121 , and can be specifically arranged on the inner wall of the housing 121 and above the driving magnet 141 , and the carrier 131 drives the image sensor 132 along the direction of the lens 11 . During the movement of the optical axis, the position sensing module can determine the relative position between the image sensor 132 and the lens 11 by sensing the change of the magnetic field generated by the sensing magnet 17, that is, it can be acquired in real time. The position information of the image sensor 132 is convenient to control the displacement amount of the image sensor 132 . It should be noted that, since the auto-focusing method adopted in the embodiment of the present application is to drive the image sensor while the lens does not move, and the relative position between the sensing magnet 17 and the driving magnet 141 is fixed, there is no relative position between the two. Therefore, the accuracy of the position of the image sensor 132 measured by the position sensing module can be ensured.

Optionally, in some embodiments, the camera module further includes a controller, and the controller is configured to control the image sensor according to the imaging result of the image sensor and the relative position between the image sensor and the lens. drive components. That is to say, the position sensing module feeds back the sensed position information of the image sensor 132 to the controller, and the controller can obtain the imaging result (eg, imaging quality) of the image sensor and the position information of the image sensor fed back by the position sensing module , and then according to the imaging results and whether the relative position between the image sensor and the lens meets the requirements, the coil 142 in the drive assembly is then controlled and adjusted to obtain the best relative position between the image sensor and the lens to achieve good focus. , so as to obtain better imaging results. Therefore, in the embodiment of the present application, by setting the position sensing module to realize double closed-loop feedback: that is, the feedback of the imaging result (imaging quality) and the position feedback of the image sensor, the control accuracy of the camera module can be effectively improved, and the imaging quality can be improved.

In some optional embodiments of the present application, the camera module further includes an elastic piece 16 , the elastic piece 16 is disposed in the housing 121 , and the carrier 131 is located along the optical axis of the lens 11 . When the direction of the lens 11 moves to a preset position, the carrier 131 is in contact with the elastic piece 16 , and the elastic piece 16 is elastically deformed to provide resistance against the carrier 131 from moving forward. Therefore, when the camera module is dropped, the elastic sheet 16 can protect the carrier 131 and the image sensor 132 thereon, and since the driving assembly of the present application has a large thrust, the elastic sheet 16 can be properly enhanced. rigidity to enhance its reliability.

Optionally, the embodiment of the present application further provides an electronic device, which includes the camera module described in any of the above embodiments, and can achieve the same technical effect. To avoid repetition, details are not repeated here.

The electronic device in this embodiment of the present application may be a mobile electronic device or a non-mobile electronic device. Exemplarily, the mobile electronic device may be a mobile phone, a tablet computer, a notebook computer, a palmtop computer, an in-vehicle electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (personal digital assistant). assistant, PDA), etc., the non-mobile electronic device may be a personal computer (personal computer, PC), a television (television, TV), a teller machine or a self-service machine, etc., which are not specifically limited in the embodiments of the present application.

It should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, It also includes other elements not expressly listed or inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in the reverse order depending on the functions involved. To perform functions, for example, the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to some examples may be combined in other examples.

The embodiments of the present application have been described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific embodiments, which are merely illustrative rather than restrictive. Under the inspiration of this application, without departing from the scope of protection of the purpose of this application and the claims, many forms can be made, which all fall within the protection of this application.

Claims

A camera module, comprising: a lens, a lens fixing component, a photosensitive component and a driving component;

The lens fixing assembly includes a casing and a base plate, the casing is arranged on the base plate, the casing is provided with an installation hole, and the lens is installed in the installation hole;

An accommodating cavity is formed by enclosing the lens, the casing and the substrate, the photosensitive component is disposed in the accommodating cavity, the photosensitive component includes a carrier and an image sensor, and the image sensor is disposed in the accommodating cavity. on the carrier and facing the lens;

The driving component is used for driving the carrier to drive the image sensor to move in the accommodating cavity along the optical axis direction of the lens.
The camera module according to claim 1, wherein the driving assembly comprises a coil and a driving magnet, the driving magnet is arranged in the housing, the coil is arranged on the carrier, and the coil is energized In some cases, it can be driven by the driving magnet to drive the carrier to move along the optical axis of the lens in the accommodating cavity.
The camera module according to claim 1 or 2, wherein the photosensitive component further comprises a first circuit board, the image sensor is disposed on one side of the first circuit board, and the image sensor is connected to the first circuit board. A circuit board is electrically connected.
The camera module according to claim 3, wherein the carrier is provided with a first stepped groove, and the first circuit board is installed in the first stepped groove.
The camera module according to claim 3, further comprising a second circuit board, the second circuit board is a flexible circuit board, the second circuit board is disposed on the substrate, the second circuit board is The outer edge area of the side surface close to the substrate is connected to the substrate, and the side surface of the first circuit board away from the image sensor is connected to the center area of the side surface of the second circuit board away from the substrate.
The camera module according to claim 3, further comprising a position sensing module and a sensing magnet, the position sensing module is disposed on the first circuit board, and the sensing magnet is disposed in the housing, In the process that the carrier drives the image sensor to move along the optical axis of the lens, the position sensing module determines the distance between the image sensor and the lens by sensing the change of the magnetic field generated by the sensing magnet relative position.
The camera module according to claim 6, further comprising a controller for controlling the driving assembly according to the imaging result of the image sensor and the relative position between the image sensor and the lens .
The camera module according to claim 1, wherein the photosensitive component further comprises a filter, the filter is located between the image sensor and the lens, and the filter is perpendicular to the lens the optical axis.
The camera module according to claim 8, wherein the carrier is provided with a second stepped groove, and the optical filter is installed in the second stepped groove.
The camera module according to claim 1, further comprising an elastic sheet, the elastic sheet is arranged in the housing, and the carrier moves to a preset position along the optical axis of the lens in the direction of the lens. In this case, the carrier is abutted against the elastic sheet.
An electronic device, comprising the camera module according to any one of claims 1-10.