CN112616005B

CN112616005B - Camera module and electronic equipment

Info

Publication number: CN112616005B
Application number: CN202011629688.1A
Authority: CN
Inventors: 杨泽; 李文珍; 庞钦全
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2022-05-20
Anticipated expiration: 2040-12-30
Also published as: CN112616005A

Abstract

The application discloses camera module and electronic equipment, camera module includes: a drive motor; a lens disposed within the drive motor; the circuit board is connected with the driving motor; position detecting element, position detecting element includes light emitting component and photosensitive element, light emitting component with at least one of photosensitive element set up in the circuit board, the camera lens orientation the one side of circuit board is equipped with the reflection part, the reflection part will the light reflection that light emitting component sent extremely photosensitive element. The driving motor that present camera module exists can be solved to this scheme and the not enough and relatively poor problem of formation of image effect of driving force.

Description

Camera module and electronic equipment

Technical Field

The application belongs to the technical field of shooting devices, and particularly relates to a camera module and electronic equipment.

Background

Along with the increasing improvement of the life quality of people, more and more people like recording life in a shooting mode, so that the application range of the electronic equipment with the shooting function is wider and wider, and the requirements of people on the shooting effect are also continuously improved.

The camera module that can realize auto focus can improve the shooting effect better, and usually, the camera module can realize auto focus through the mode of driving motor drive camera lens motion, and this driving motor is equipped with driver chip and position detection subassembly, and this position detection subassembly is used for detecting whether the camera lens moves in place. In the existing camera module, parts such as a driving chip and a position detection assembly are integrated in a driving motor, so that the internal space of the driving motor is seriously occupied, and the size of a part for outputting driving force in the driving motor is small, so that the driving force of the driving motor is insufficient. Meanwhile, the space available for bearing the lens in the driving motor is also small, so that the specification of the lens is small, and the imaging effect is further poor.

Disclosure of Invention

The purpose of the embodiment of the application is to provide a camera module and electronic equipment, can solve the driving force of the driving motor that present camera module exists not enough and the relatively poor problem of formation of image effect.

In order to solve the technical problem, the present application is implemented as follows:

in a first aspect, an embodiment of the present application provides a camera module, which includes:

a drive motor;

a lens disposed within the drive motor;

the circuit board is connected with the driving motor;

a position detection assembly including a light emitting element and a light sensing element, at least one of the light emitting element and the light sensing element being disposed on the circuit board,

one surface of the lens, facing the circuit board, is provided with a reflecting part, and the reflecting part reflects light emitted by the light-emitting element to the photosensitive element.

In a second aspect, an embodiment of the present application provides an electronic device, which includes the above camera module.

In the embodiment of the application, at least one part of the position detection assembly is arranged outside the driving motor, and the part can be electrically connected with the circuit board, so that the part does not occupy the internal space of the driving motor, and the part of the driving motor for outputting the driving force can be properly increased, so that larger driving force can be output; meanwhile, the space of the driving motor for bearing the lens can be properly increased, so that the specification of the lens can be increased, and the imaging effect of the camera module can be improved.

Drawings

Fig. 1 is an exploded view of a camera module disclosed in an embodiment of the present application;

fig. 2 is a perspective view of a camera module disclosed in an embodiment of the present application;

fig. 3 is a front view of a camera module disclosed in an embodiment of the present application;

FIG. 4 is a sectional view taken along line A-A of FIG. 3;

FIG. 5 is a sectional view taken along line B-B of FIG. 4;

fig. 6 is a schematic view of a partial structure of a camera module disclosed in an embodiment of the present application;

fig. 7 is a matching diagram of a circuit board and a driving chip disclosed in the embodiment of the present application;

fig. 8 is a schematic structural diagram of a filter assembly according to an embodiment of the present disclosure.

Description of reference numerals:

100-drive motor, 110-connection terminal, 121-lens carrier, 122-drive coil, 123-drive magnet, 124-housing;

200-lens, 210-reflector;

300-circuit board, 310-circuit board main body, 320-auxiliary component, 330-photosensitive chip, 331-first edge, 332-second edge, 340-flexible circuit board and 350-connector;

400-position detection component, 410-light emitting element, 420-light sensing element;

500-a driver chip;

600-dust prevention;

700-filter assembly, 710-filter support, 711-avoidance groove, 720-first filter, 730-second filter.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

The following describes in detail a camera module and an electronic device provided in the embodiments of the present application through specific embodiments and application scenarios thereof with reference to the accompanying drawings.

As shown in fig. 1 to 8, an embodiment of the present application discloses a camera module, which includes a driving motor 100, a lens 200, a circuit board 300, a position detecting assembly 400, and a driving chip 500.

The driving motor 100 can realize focusing of the camera module, the lens 200 is disposed in the driving motor 100, the driving motor 100 is connected to the lens 200, the circuit board 300 is connected to the driving motor 100, the circuit board 300 is provided with the photosensitive chip 330, the position detecting assembly 400 includes a light emitting element 410 and a photosensitive element 420, the light emitting element 410 can emit adjustable light, the adjustment mode is mainly adjustment of emission frequency, and the photosensitive element 420 can sense light. At least one of the light emitting element 410 and the light sensing element 420 is disposed on the circuit board 300, alternatively, only the light emitting element 410 may be disposed on the circuit board 300, only the light sensing element 420 may be disposed on the circuit board 300, and both the light emitting element 410 and the light sensing element 420 may be disposed on the circuit board. That is, at least a portion of the position detecting assembly 400 is disposed outside the driving motor 100 and electrically connected to the circuit board 300, in other words, components disposed outside the driving motor 100 in the position detecting assembly 400 may be electrically connected to the circuit board 300. The driving chip 500 is used for controlling the operation state of the driving motor 100, and the driving chip 500 may be disposed in the driving motor 100.

Above-mentioned light emitting component 410 and photosensitive element 420 can set up with sensitization chip 330 components of a whole that can function independently, also can set up as an organic whole, and light emitting component 410 and photosensitive element 420 can be integrated to sensitization chip 330 promptly to reduce the spare part quantity of camera module, promote compact structure degree simultaneously, make the shared space of camera module littleer, and reduce its manufacturing difficulty and manufacturing cost. The number of the position detection assemblies 400 may be one or more, which is not limited in the embodiment of the present application. In addition, the position detection assembly 400 can be used not only for distance measurement during focusing, but also for distance measurement, tilt angle measurement, and the like during anti-shake.

The lens 200 has a reflective portion 210 on a surface facing the circuit board 300, and the reflective portion 210 has a function of reflecting light, so that the reflective portion 210 can reflect light emitted from the light emitting device 410 to the light sensing device 420. Alternatively, the reflection part 210 may be a mirror separately disposed on the lens 200, or the reflection part 210 is a surface of the lens 200, which can reflect light rays in a diffuse reflection manner, and relatively speaking, the former reflection efficiency is higher, so that a detection result can be obtained more quickly, and the latter reflection efficiency can reduce the number of components of the camera module. The light emitted by the light emitting device 410 will irradiate the reflective portion 210, the reflective portion 210 can reflect the light to the light sensing device 420, and the difference between the time when the light emitting device 410 emits light and the time when the light is sensed by the light sensing device 420 can represent the distance between the lens 200 and the light sensing chip 330, so that the position of the lens 200 relative to the light sensing chip 330 can be measured according to the light emitting device 410 and the light sensing device 420.

Alternatively, the circuit board 300 may include a circuit board main body 310 and a flexible circuit board 340, the photosensitive chip 330 is disposed on the circuit board main body 310, one end of the flexible circuit board 340 is connected to the circuit board main body 310, and the other end is provided with a connector 350, the connector 350 is used for connecting to a main board of an electronic device, and the like. In addition, the circuit board 300 may be provided with at least one auxiliary component 320, and the auxiliary component 320 may assist the position detection assembly 400, the driving chip 500, and the like, where the auxiliary component 320 may be a sensor, a capacitor, and the like.

The driving motor 100 can apply an acting force to the lens 200, so as to drive the lens 200 to move relative to the photosensitive chip 330, thereby achieving the purpose of focusing. In the focusing process, the position detecting assembly 400 can detect the position of the lens 200 relative to the photosensitive chip 330 in real time, and feed back the detection data to the driving chip 500, and the driving chip 500 can accurately apply or change the electric energy of the driving motor 100 in combination with the real-time position of the lens 200 relative to the photosensitive chip 330 and the image information processing result of the camera module, so that the lens 200 is quickly and accurately driven to the position where clear imaging can be performed, thereby completing quick focusing.

In the embodiment of the present application, at least a portion of the position detecting assembly 400 is disposed outside the driving motor 100, and the portion may be electrically connected to the circuit board 300, so that the portion does not occupy the internal space of the driving motor 100, so that the portion of the driving motor 100 for outputting the driving force may be appropriately increased to output a larger driving force; meanwhile, the space of the driving motor 100 for carrying the lens 200 may be appropriately increased, so that the specification of the lens 200 may be increased, so as to improve the imaging effect of the camera module.

Optionally, the driving motor 100 may include a housing 124, a lens carrier 121, a driving coil 122 and a driving magnet 123, the lens carrier 121 is connected to the lens 200, optionally, the lens carrier 121 is provided with an inner hole for accommodating the lens 200, the inner hole may be a through hole or a threaded hole, the lens 200 may be in threaded fit with the threaded hole, and further, a dust-proof groove may be disposed at the bottom of the inner hole to achieve the purpose of dust-proof. One of the driving coil 122 and the driving magnet 123 is provided to the lens carrier 121, and the other is provided to the housing 124. Alternatively, the driving coil 122 may be provided to the lens carrier 121, and the driving magnet 123 may be provided to the housing 124; alternatively, the driving coil 122 may be provided to the housing 124 and the driving magnet 123 may be provided to the lens carrier 121. Regardless of the arrangement of the driving coil 122 and the driving magnet 123, when the driving coil 122 is powered on, it interacts with the driving magnet 123 to generate a magnetic force, and the magnetic force can drive the lens carrier 121 to move, so as to move the lens 200. The lens 200 is driven to move by the driving coil 122 and the driving magnet 123, so that the advantages of simple structure, reliable driving and the like are achieved.

Alternatively, the driving coil 122 may surround the lens carrier 121 to uniformly apply a force to the lens carrier 121, so that the lens carrier 121 may move more stably without being easily jammed.

In an optional embodiment, the driving motor 100 further includes a base, a first elastic sheet and a second elastic sheet, one of the first elastic sheet and the second elastic sheet is electrically connected to the circuit board 300, the first elastic sheet and the second elastic sheet are respectively located at two sides of the lens carrier 121, the first elastic sheet is provided with a first bearing portion, the second elastic sheet is provided with a second bearing portion, and the lens carrier 121 is supported by the first bearing portion and the second bearing portion. The lens carrier 121 can be suspended by the first elastic sheet and the second elastic sheet, so that the stroke of the driving motor 100 driving the lens carrier 121 to move is shortened, and the power consumption of the camera module is reduced.

In order to realize the connection between the second elastic sheet and the circuit board 300, the driving motor 100 may further include two connection terminals 110, and one end of each connection terminal 110 is fixed to the second elastic sheet and the other end is fixed to the circuit board 300.

Considering that the light-sensing chip 330 is disposed on the circuit board 300, the light-emitting device 410 and the light-sensing device 420 can be disposed on the circuit board 300 at an interval, and the light-emitting device 410, the light-sensing device 420 and the light-sensing chip 330 are disposed on the same component, that is, the circuit board 300, and the path length of the light path formed by the light emitted from the light-emitting device 410 reaching the light-sensing device 420 is substantially equal to twice the distance between the light-sensing chip 330 and the reflection portion 210, so that the distance between the lens 200 and the light-sensing chip 330 can be calculated more conveniently in this embodiment.

The camera module may further include a filter assembly 700, where the filter assembly 700 includes a filter holder 710 and a first filter 720, the driving motor 100 may be connected to the circuit board 300 through the filter holder 710, the first filter 720 is disposed on the filter holder 710, and the first filter 720 is located between the photosensitive chip 330 and the lens 200, so as to achieve a filtering effect. Further, the filter holder 710 is provided with an avoiding groove 711, one end of the connection terminal 110 can pass through the avoiding groove 711 and be connected with the circuit board 300, and in order to facilitate assembling the connection terminal 110, one end of the avoiding groove 711, which is away from the circuit board 300, can be provided with a chamfer so as to play a guiding role.

In a further embodiment, the filter assembly 700 further includes a second filter 730, the second filter 730 is disposed on the filter holder 710, and the second filter 730 is located between the light emitting device 410 and the reflection portion 210. Optionally, a gap is formed between the first filter 720 and the second filter 730, so that the first filter and the second filter can work independently and are not easy to interfere; the size of the second filter 730 can be smaller than that of the first filter 720, so as to reduce the space occupied by the second filter 730. In this embodiment, the light emitted from the light emitting device 410 first passes through the second filter 730, and then reaches the reflective portion 210, and is reflected to the light sensing device 420. Therefore, the embodiment can further screen the light emitted by the light emitting element 410, so that the light sensing element 420 can sense the light conveniently, and the light emitted by the light emitting element 410 can be further prevented from influencing the imaging effect of the camera module. Furthermore, the size of the second filter 730 can be set larger, so that the light emitted from the light emitting device 410 can pass through the second filter 730, and the light reflected by the reflection portion 210 can also pass through the second filter 730 and reach the light sensing device 420, thereby performing finer screening on the light.

In order to prevent the light emitted from the light emitting element 410 from interfering with the imaging of the camera, at least one of the light emitting element 410 and the light sensing element 420 is disposed at the edge of the circuit board 300, and the reflection portion 210 is disposed at the edge of the side of the lens 200 facing the circuit board 300. At this time, the light emitting device 410, the light sensing device 420 and the reflection portion 210 are far away from the optical axis of the lens 200 and the light sensing chip 330, so that the light emitted by the light emitting device 410 is not easily interfered with the light entering the camera module in the process of being emitted by the reflection portion 210 and being sensed by the light sensing device 420, thereby further improving the imaging effect of the camera module.

The light sensing chip 330 has a first edge 331 and a second edge 332, the length of the first edge 331 is greater than that of the second edge 332, alternatively, the light sensing chip 330 may have a rectangular structure, the first edge 331 is a long edge of the light sensing chip 330, and the second edge 332 is a short edge of the light sensing chip 330. At least one of the light emitting element 410 and the light sensing element 420 is located between the first edge 331 and an edge of the circuit board 300. This location provides more room and thus facilitates the placement of the position sensing assembly 400. At the same time, such a design can also alleviate or even avoid the position detection assembly 400 from adversely affecting the optical path of the lens 200.

Alternatively, when the light emitting element 410 and the light sensing element 420 are disposed on the circuit board 300 at intervals, they may be disposed at intervals along a direction perpendicular to the first edge 331, but considering that the space is limited in this direction, in another embodiment, the light emitting element 410 and the light sensing element 420 may be disposed along a direction parallel to the first edge 331, and since the first edge 331 is longer, a larger space may be provided for disposing the light emitting element 410 and the light sensing element 420.

The light emitted from the light emitting element 410 may be visible light, but the light emitting element 410 may be an infrared light emitting element in consideration of the fact that the visible light easily affects the image formation of the camera module. The light emitted by the light emitting element 410 is infrared light, and the wavelength range of the infrared light can be kept away from the wavelength range of visible light, so that adverse effects on the imaging effect of the camera module are avoided. Moreover, the arrangement mode has higher detection precision.

It is mentioned above that the driving chip 500 may be disposed in the driving motor 100, and in other embodiments, the driving chip 500 may be disposed on a side of the circuit board 300 facing the lens 200. In this embodiment, the driving chip 500 no longer occupies the internal space of the driving motor 100, so the space of the driving motor 100 can be used for disposing a larger lens, or disposing other components. Meanwhile, the driving motor 100 can be a traditional open-loop motor, and the manufacturing difficulty of the motor is lower, so that the automatic manufacturing of the driving motor 100 is facilitated, and the manufacturing cost of the camera module is further reduced. In addition, the circuit board 300 is integrally provided with the position detection assembly 400 and the driving chip 500, so that the assembly of the camera module is simpler.

In addition, the above scheme can omit a flexible circuit board for installing the driving chip 500, which is arranged by the traditional driving motor, and can omit a frame for fixing the flexible circuit board, thereby reducing the number of welding terminals, and being beneficial to the promotion of module stacking and module welding process. Therefore, the solution can simplify the structure of the driving motor 100, reduce the cost thereof, and facilitate the automated manufacturing.

When the photosensitive chip 330 has the first edge 331 and the second edge 332, and the length of the first edge 331 is greater than that of the second edge 332, the driving chip 500 is located between the first edge 331 and the edge of the circuit board 300, and the space is relatively large, so that the driving chip 500 is more conveniently arranged.

In order to prevent dust, the driving motor 100 is provided with a dust-proof member 600, and the dust-proof member 600 surrounds the lens 200. The dust-proof member 600 is closer to the lens 200, so that dust prevention can be achieved more directly and more efficiently. Alternatively, the dust-proof member 600 may be integrally provided with the driving motor 100, which is more advantageous for assembling the camera module; alternatively, the dust proof member 600 and the driving motor 100 are separately provided, so that the subsequent maintenance of the dust proof member 600 and the driving motor 100 is facilitated. When the bottom of the inner hole of the lens carrier 121 is provided with a dustproof groove and the driving motor 100 includes a base, the dustproof member 600 may be disposed at the through hole of the base for accommodating the lens 200, and the dustproof member 600 corresponds to the dustproof groove.

The embodiment of the application also discloses electronic equipment which comprises the camera module in any embodiment.

The electronic device disclosed in the embodiment of the present application may be a smart phone, a tablet computer, an electronic book reader, a wearable device (e.g., a smart watch), an electronic game machine, and the like, and the specific kind of the electronic device is not limited in the embodiment of the present application.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a camera module which characterized in that includes:

a drive motor (100);

the lens (200) is arranged in the driving motor (100), and the lens (200) is connected with the driving motor (100);

the circuit board (300), the circuit board (300) is connected with the driving motor (100), the circuit board (300) is provided with a photosensitive chip (330), and the driving motor (100) drives the lens (200) to move relative to the photosensitive chip (330);

a position detection assembly (400), wherein the position detection assembly (400) comprises a light-emitting element (410) and a light-sensing element (420), the light-emitting element (410) and the light-sensing element (420) are arranged on the circuit board (300) at intervals,

one surface of the lens (200) facing the circuit board (300) is provided with a reflecting part (210), and the reflecting part (210) reflects light emitted by the light emitting element (410) to the photosensitive element (420).

2. The camera module according to claim 1, further comprising a filter assembly (700), wherein the filter assembly (700) comprises a filter holder (710), a first filter (720) and a second filter (730), the driving motor (100) is connected to the circuit board (300) through the filter holder (710), the first filter (720) and the second filter (730) are both disposed on the filter holder (710), and the second filter (730) is disposed between the light emitting element (410) and the reflector (210).

3. The camera module according to claim 1, wherein at least one of the light emitting element (410) and the light sensing element (420) is disposed at an edge of the circuit board (300), and the reflection portion (210) is disposed at an edge of a face of the lens (200) facing the circuit board (300).

4. The camera module according to claim 1, wherein the circuit board (300) is provided with a photosensitive chip (330), the photosensitive chip (330) has a first edge (331) and a second edge (332), the length of the first edge (331) is greater than the length of the second edge (332), and at least one of the light emitting element (410) and the photosensitive element (420) is located between the first edge (331) and an edge of the circuit board (300).

5. The camera module according to claim 4, wherein the light emitting element (410) and the light sensing element (420) are disposed on the circuit board (300) at intervals, and the light emitting element (410) and the light sensing element (420) are arranged along a direction parallel to the first edge (331).

6. The camera module of claim 1, wherein the light emitting element (410) is an infrared emitter.

7. The camera module according to claim 1, further comprising a driving chip (500), wherein the driving chip (500) is disposed on a side of the circuit board (300) facing the lens (200).

8. The camera module according to claim 7, wherein the circuit board (300) is provided with a photosensitive chip (330), the photosensitive chip (330) has a first edge (331) and a second edge (332), the length of the first edge (331) is greater than the length of the second edge (332), and the driving chip (500) is located between the first edge (331) and the edge of the circuit board (300).

9. The camera module according to claim 1, wherein the driving motor (100) is provided with a dust-proof member (600), the dust-proof member (600) surrounding the lens (200).

10. An electronic device, comprising the camera module according to any one of claims 1 to 9.