CN215499275U

CN215499275U - Camera module and electronic equipment

Info

Publication number: CN215499275U
Application number: CN202122176410.XU
Authority: CN
Inventors: 胡远鹏; 许杨柳
Original assignee: Kunshanqiu Titanium Photoelectric Technology Co Ltd
Current assignee: Kunshanqiu Titanium Photoelectric Technology Co Ltd
Priority date: 2021-09-09
Filing date: 2021-09-09
Publication date: 2022-01-11
Anticipated expiration: 2031-09-09

Abstract

The utility model relates to a camera module and electronic equipment, and belongs to the technical field of cameras. The camera module comprises a substrate, a lens, an image sensor and a piezoelectric driver, wherein the substrate comprises a first substrate and a second substrate, the first substrate is provided with a mounting hole, the second substrate is positioned in the mounting hole, the lens is fixed on the first substrate, the image sensor is fixed on the second substrate and is arranged opposite to the lens, and the piezoelectric driver is fixedly connected with the first substrate and supports the second substrate. The utility model utilizes the performance of the piezoelectric driver of power-on deformation and power-off recovery to drive the second substrate and the image sensor to move, thereby adjusting the distance between the image sensor and the lens and achieving the purpose of zooming. Simultaneously, because the volume of piezoelectric actuator is far less than the volume of voice coil motor, consequently use piezoelectric actuator to replace the volume that the voice coil motor can make the camera module volume littleer.

Description

Camera module and electronic equipment

Technical Field

The utility model belongs to the technical field of cameras, and particularly relates to a camera module and electronic equipment.

Background

The existing automatic zooming camera module adopts a Voice Coil Motor (VCM) as a main moving part, and structural components such as a coil, a magnet, an elastic sheet and the like are arranged in the motor; when a certain current is input to an internal coil of the motor, the current and the internal magnet generate a magnetic field, and the magnetic field drives the lens to move; the distance that the camera lens moved just can be controlled to the size of control current, and when the distance produced the change, the module of making a video recording just can realize the function of zooming.

However, the main disadvantages of the camera module using a Voice Coil Motor (VCM) to achieve zooming include large size, complicated internal structure, and magnetic interference.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present invention is to overcome the defects in the prior art, and provide a camera module and an electronic device, so as to solve the technical problem of large volume of the camera module in the prior art.

The utility model is realized by the following technical scheme:

the application provides a camera module, camera module includes:

the substrate comprises a first substrate and a second substrate, wherein the first substrate is provided with a mounting hole, and the second substrate is positioned in the mounting hole;

a lens fixed to the first substrate;

an image sensor fixed to the second substrate and disposed opposite to the lens;

and the piezoelectric driver is electrically connected with the first substrate, supports the second substrate and drives the second substrate to move.

In some embodiments, the substrate further comprises at least one flexible linker arm connected between the first and second substrates.

In some embodiments, the substrate is a rigid-flex board, the first substrate and the second substrate are rigid circuit boards, and at least one of the flexible connecting arms is a flexible circuit board.

In some embodiments, the plurality of flexible connecting arms are distributed in a circumferential array around the second substrate.

In some embodiments, the first substrate is fixed with a pad, and the electrode of the piezoelectric actuator is fixed to the pad by soldering.

In some embodiments, the camera module further includes a filter, the filter is located between the lens and the image sensor, and the filter and the image sensor are fixed relatively.

In some embodiments, a support is fixed on the second substrate, and the support is fixedly connected with the optical filter.

In some embodiments, the support is provided with a central hole, the optical filter is fixed in the central hole and located at one end of the central hole, and the other end of the central hole covers the image sensor.

In some embodiments, the camera module further includes a stiffener, the stiffener defines a first groove, and the stiffener is fixedly connected to the first substrate and defines the piezoelectric actuator in the first groove.

The application also provides an electronic device comprising the camera module.

Compared with the prior art, the utility model has the following beneficial effects:

according to the camera module, the first substrate is provided with the mounting hole, the second substrate is arranged in the mounting hole, meanwhile, the lens in the camera module is fixed on the first substrate, the image sensor and the piezoelectric driver are fixed on the second substrate, the second substrate is driven to move by utilizing the deformation generated after the piezoelectric driver is electrified, so that the image sensor is close to or far away from the lens, the zooming effect of the camera module is achieved, the camera module replaces the prior art that the voice coil motor drives the camera to move to achieve zooming, and the volume of the piezoelectric driver is far smaller than that of the voice coil motor, so that the volume of the camera module can be smaller by using the piezoelectric driver. Meanwhile, the mounting hole is formed in the first substrate, so that the second substrate can move towards the lower end or the upper end of the first substrate, the moving range of the second substrate is expanded, and the larger zooming range of the camera module is obtained. In addition, when the piezoelectric actuator is not electrified, the second substrate is positioned in the mounting hole, so that the space volume occupied by the second substrate is reduced, and the volume of the camera module is further reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a camera module at one focal length;

FIG. 2 is a top view of the substrate of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 1 at A;

FIG. 4 is a top view of the piezoelectric actuator of FIG. 1;

fig. 5 is a schematic structural diagram of the camera module at another focal length.

In the figure:

100-a substrate; 110-a first substrate; 111-mounting holes; 112-a pad; 120-a second substrate; 130-flexible connecting arms;

200-lens; 210-a mounting cavity;

300-an image sensor; 310-gold wire;

400-a piezoelectric actuator; 410-electrodes;

500-an optical filter; 510-a stent;

600-a stiffening plate; 610-groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

Example one

This embodiment provides a camera module, can be applied to and need realize zooming in various electronic equipment of making a video recording function, and this camera module has solved among the prior art technical problem that the voice coil motor is bulky in the camera.

The camera module in the present embodiment includes a substrate 100, a lens 200, an image sensor 300, and a piezoelectric driver 400.

As shown in fig. 1, the substrate 100 is a base for mounting the entire camera module, and the lens 200, the image sensor 300 and the piezoelectric actuator 400 in the camera module are all directly or indirectly fixedly connected to the substrate 100.

As shown in fig. 2, specifically, the substrate 100 includes a first substrate 110 and a second substrate 120, the first substrate 110 and the second substrate 120 are both plate bodies, and in this embodiment, the first substrate 110 and the second substrate 120 are both horizontally disposed. The first substrate 110 is an annular plate, a mounting hole 111 is formed in the middle of the first substrate, and the mounting hole 111 vertically penetrates through the upper and lower plate surfaces of the first substrate 110. The second substrate 120 is positioned within the mounting hole 111 such that the second substrate 120 can move relative to the first substrate 110 within the mounting hole 111. The second substrate 120 may move inside the mounting hole 111 or between inside and outside the mounting hole 111 depending on the required moving distance of the second substrate 120 and the thickness of the first substrate 110. And a certain gap is formed between the periphery of the second substrate 120 and the hole wall of the mounting hole 111, so that the second substrate 120 can be prevented from interfering with the first substrate 110 in the moving process. After the mounting holes 111 are formed in the first substrate 110, the second substrate 120 can move up and down through the first substrate 110, so that the second substrate 120 can have a longer moving distance.

It should be noted that, in practical use, the first substrate 110 and the second substrate 120 are not limited to be horizontally disposed, and the first substrate 110 and the second substrate 120 are set to be horizontally disposed only for the purpose of more conveniently describing the position relationship between each component in the camera module and the first substrate 110 and the second substrate 120. The actual positions of the first substrate 110 and the second substrate 120 can be adjusted according to the installation position of the camera module on the electronic device, and they can be vertically arranged or obliquely arranged.

As shown in fig. 2, further, the substrate 100 further includes a flexible connection arm 130, two ends of the flexible connection arm 130 are respectively connected to the first substrate 110 and the second substrate 120, the flexible connection arm 130 has a certain flexibility and can deform along with the movement of the second substrate 120, so that the first substrate 110 and the second substrate 120 can be flexibly connected through the flexible connection arm 130, and thus the first substrate 110 and the second substrate 120 form a matching component under the connection effect of the flexible connection arm 130, which is convenient for installation and disassembly, and meanwhile, the first substrate 110 or the second substrate 120 can be prevented from being lost in the installation or disassembly process.

In this embodiment, the number of the flexible connecting arms 130 may be one or multiple, when the number of the flexible connecting arms 130 is multiple, the multiple flexible connecting arms 130 are distributed between the first substrate 110 and the second substrate 120 in a circumferential array along a preset direction with the second substrate 120 as a center, and two ends of each flexible connecting arm 130 are respectively connected with the first substrate 110 and the second substrate 120. The plurality of flexible connecting arms 130 can connect the first substrate 110 and the second substrate 120 from multiple directions, thereby defining the range of the motion space of the second substrate 120, and further avoiding the first substrate 110 or the second substrate 120 from being lost during the mounting or dismounting process.

As shown in fig. 2, in the present embodiment, the first mounting hole 111 formed in the first substrate 110 is a square hole, the square hole has four hole walls a1, a2, a3, and a4, the second substrate 120 is a square plate, the second substrate 120 has four side walls b1, b2, b3, and b4, the second substrate 120 is located at the center of the first mounting hole 111, the hole wall a1 is opposite to the side plate b1, the hole wall a2 is opposite to the side plate b2, the hole wall a3 is opposite to the side plate b3, the hole wall a4 is opposite to the side plate b4, the number of the flexible connecting arms 130 is four, and each flexible connecting arm 130 is respectively connected between the hole wall a1 and the side plate b1, between the hole wall a2 and the side plate b2, between the hole wall a3 and the side plate b3, and between the side plates a4 and b 4. The four flexible connecting arms 130 are equal in length, are circumferentially distributed in the gap between the first substrate 110 and the second substrate 120 by taking the second substrate 120 as a center, and are each connected with the corresponding hole wall and the corresponding side plate in an inclined manner in the horizontal direction, and the inclined direction of each flexible connecting arm 130 is clockwise inclined or counterclockwise inclined. So that the length of the flexible connecting arm 130 is longer, the second substrate 120 can have a longer moving distance when the second substrate 120 moves up and down. Moreover, under the condition that the flexible connection arm 130 is connected obliquely, when the second substrate 120 is located in the mounting hole 111, that is, the first substrate 110 and the second substrate 120 are on the same horizontal plane, the flexible connection arm 130 can be in a straightened state, and it is not necessary to separately set a margin for the flexible connection arm 130 to move the second substrate 120, that is, it is not necessary to set the flexible connection arm 130 in a bent state.

In some embodiments, the flexible connecting arm 130 may also be vertically connected to the first substrate 110 and the second substrate 120, and when the first substrate 110 and the second substrate 120 are located on the same horizontal plane, the flexible connecting arm 130 cannot be in a stretched state, and a certain margin needs to be preset to make the length of the flexible connecting arm 130 greater than the linear distance between the first substrate 110 and the second substrate 120, so that the second substrate 120 can move relative to the first substrate 110. The flexible connecting arm 130 with a predetermined margin may be in a bent state and may interfere with the movement of the second substrate 120.

In this embodiment, the substrate 100 is a rigid-flex board, wherein the first substrate 110 and the second substrate 120 are both rigid circuit boards, all the flexible connecting arms 130 are flexible circuit boards, the flexible circuit boards can realize the conduction of the first substrate 110 and the second substrate 120, and simultaneously, the first substrate 110 and the second substrate 120 are both set to be rigid circuit boards, which can make the image sensor 300, components and parts such as piezoelectric drivers which need to be powered on can be directly electrically connected with the corresponding first substrate 110 or second substrate 120, thereby making the structure of the whole camera module more compact, being beneficial to reducing the volume of the whole camera module, and saving the space occupied by the camera module.

In some embodiments, at least one of the flexible connection arms 130 is a flexible circuit board to ensure the conduction between the first substrate 110 and the second substrate 120, and the remaining flexible connection arms 130 may also be made of other flexible materials, such as silicon rubber and rubber, and only serve as functions of implementing the flexible connection between the first substrate 110 and the second substrate 120.

In some embodiments, the flexible printed circuit board may also be replaced with an FFC (tinned flat copper wire) to achieve conduction between the first substrate 110 and the second substrate 120, but when the FFC is used to connect the first substrate 110 and the second substrate 120, corresponding connectors need to be arranged on the first substrate 110 and the second substrate 120 to connect with the FFC, and the connectors need to occupy a certain volume, so that the effect of the solution to the problem of large volume of the camera module is not as good as that of the whole substrate 100 being a rigid-flex board.

As shown in fig. 1, the lens 200 is an optical lens 200 in a camera, and is mainly used for adjusting light entering the lens 200 so that the light falls on the image sensor 300. The lower edge of the lens 200 is fixed to the upper surface of the annular first substrate 110. The fixing method of the lens 200 and the first substrate 110 is preferably adhesive fixing, which can prevent the lens 200 and the first substrate 110 from rotating or moving relatively, and is beneficial to reducing the space occupied by the lens 200 and the substrate 100 after being connected, and secondly, the fixing method of the lens 200 and the first substrate 110 can also select other connecting and fixing methods such as bolt fixing.

As shown in fig. 3, a position of the lower end of the lens 200 opposite to the mounting hole 111 of the first substrate 110 has an inwardly recessed mounting cavity 210, and the mounting cavity 210 can accommodate at least the image sensor 300 and the second substrate 120, so that the second substrate 120 can enter the mounting cavity 210 of the lens 200 when moving upwards, thereby further reducing the volume of the camera module.

As shown in fig. 1, the image sensor 300 is a photosensitive component for receiving light rays entering the camera module after being adjusted by the lens 200. The image sensor 300 is fixed on the second substrate 120 and electrically connected to the second substrate 120, the image sensor 300 is supplied with power from the second substrate 120, and the image sensor 300 is disposed opposite to the lens 200. The light adjusted by the lens 200 enters the image sensor 300, so that the image sensor 300 converts the optical signal into an electrical signal and images the electrical signal, and transmits the corresponding electrical signal to the second substrate 120. The image sensor 300 is fixed on the second substrate 120 and can move correspondingly with the movement of the second substrate 120, so that the distance between the image sensor 300 and the lens 200 is changed to obtain different depth of field effects, thereby implementing a zoom function.

As shown in fig. 3, in the present embodiment, the image sensor 300 is fixed on the second substrate 120 by adhesion, and the image sensor 300 is electrically connected to the second substrate 120 by gold wires 310, so that the second substrate 120 supplies power to the image sensor 300. Since the gold wire 310 has good oxidation resistance and high conductivity, normal operation of the image sensor 300 can be ensured, and influence on the conductivity between the image sensor 300 and the second substrate 120 due to oxidation of the conductive wire can be avoided.

In some embodiments, the image sensor 300 may also be fixed on the second substrate 120 by a pin-in-socket method, but the image sensor 300 is not as firmly adhered to the second substrate 120.

As shown in fig. 1 and 5, the piezoelectric actuator 400 is a functional ceramic that converts electrical energy and mechanical energy into each other by using a piezoelectric effect. The piezoelectric actuator 400 has a property of being deformed when energized and returning to its original shape when de-energized. Based on the performance of the piezoelectric actuator 400, in the present embodiment, the piezoelectric actuator 400 is fixed on the lower surface of the first substrate 110 and electrically connected to the first substrate 110, the first substrate 110 supplies power to the piezoelectric actuator 400, and the portion where the piezoelectric actuator 400 deforms is disposed below the second substrate 120, so that the second substrate 120 is always attached to the piezoelectric actuator 400 under the action of its own gravity. According to the different setting directions of the piezoelectric actuator 400 or the different directions of the applied currents, after the piezoelectric actuator 400 is powered on, the deformed portion of the piezoelectric actuator deforms upward (i.e., toward the direction of the image sensor 300) or the deformed portion of the piezoelectric actuator deforms downward (i.e., away from the direction of the image sensor). When the piezoelectric actuator deforms upwards, the piezoelectric actuator drives the first substrate 110 and the image sensor 300 fixed on the first substrate 110 to move towards the direction close to the lens 200, so that the distance between the image sensor 300 and the lens 200 is shortened; when the piezoelectric sensor deforms downward, the first substrate 110 and the image sensor 300 fixed on the first substrate 110 are driven to move downward, so that the distance between the image sensor 300 and the lens 200 is increased. The camera module has a larger zoom range because the image sensor 300 can move up and/or down.

As shown in fig. 2 and 4, in this embodiment, the pads 112 are fixed on the lower plate surface of the first substrate 110, the electrodes 410 of the piezoelectric actuator 400 are located at the upper end of the piezoelectric actuator 400, and after the upper end of the piezoelectric actuator 400 is connected and fixed to the first substrate 110, the electrodes 410 of the piezoelectric actuator 400 are welded to the pads 112, so as to achieve conduction. Preferably, the electrode 410 of the piezoelectric actuator 400 is located at an edge of an upper end of the piezoelectric actuator 400, so that the electrode 410 of the piezoelectric actuator 400 is welded to the pad 112 of the first substrate 110.

As shown in fig. 1, further, the camera module further includes an optical filter 500, the optical filter 500 is located between the lens 200 and the image sensor 300, so that light adjusted by the lens 200 passes through the optical filter 500 first to be filtered, and then enters the image sensor 300, the optical filter 500 is an infrared optical filter 500, and infrared light in the light can be filtered, so that the color of the image formed by the image sensor 300 is closer to the color that can be seen by human eyes. The filter 500 is fixed relative to the image sensor 300, so that the filter 500 can move synchronously with the image sensor 300, and it is ensured that light entering the image sensor 300 can be filtered by the filter 500.

As shown in fig. 3, in the present embodiment, a support 510 is fixed on the second substrate 120, and the support 510 is fixedly connected to the filter 500 to fix the filter 500 on the second substrate 120, and since the image sensor 300 is also fixed on the second substrate 120, the positions of the filter 500 and the image sensor 300 are relatively fixed.

Specifically, the holder 510 has a sleeve structure with a central hole, and a boss for supporting the optical filter 500 is protruded in the central hole of the holder 510, and the central hole of the holder 510 is larger than the volume of the image sensor 300. One end of the bracket 510 is fixed on the second substrate 120 and covers the image sensor 300 in the central hole, the filter 500 is installed and fixed in the central hole from the other end of the bracket 510, and the bottom of the green sheet is positioned and supported by a boss. After the lower end of the optical filter 500 is attached to the boss, the upper end of the optical filter 500 is flush with the end of the support 510 or is lower than the end of the support 510, so that the support 510 can fix the optical filter 500, cover the optical filter 500 in the central hole, form a protective cover for the optical filter 500, and prevent the optical filter 500 from being broken due to collision, and in addition, the support 510 can cover the image sensor 300 in the central hole, form a protective cover for the image sensor 300, and further prevent the image sensor 300 from being damaged due to collision.

In this embodiment, the protrusion is an annular protrusion to provide a larger contact area with the filter 500, so that the filter 500 is more firmly contacted with the protrusion.

In some embodiments, the bosses may also be a plurality of block-shaped bodies, and an axis of a central hole of the plurality of bosses is a center, and the circumference of the central hole is uniformly fixed on the hole wall of the central hole, so as to support and fix the optical filter 500.

The fixing method of the bracket 510 and the second substrate 120 may be an adhesive fixing method or a welding fixing method, which is not particularly limited in this embodiment. The holder 510 and the filter 500 are preferably fixed by bonding,

as shown in fig. 1, in this embodiment, the camera module further includes a reinforcing plate 600, and the reinforcing plate 600 connects and fixes two opposite sides of the first substrate 110 to prevent the annular first substrate 110 from deforming.

As shown in fig. 3, in particular, the reinforcing plate 600 is located below the first base plate 110 and is fixedly connected to the lower ends of two opposite sides of the first base plate 110, so as to reduce the volume of the camera module in the radial direction. Furthermore, an end of the stiffener 600 facing the first substrate 110 is provided with an inward recessed groove 610, and the size of the groove 610 is larger than that of the piezoelectric actuator 400, so as to cover the piezoelectric actuator 400 in the groove 610, so that the stiffener 600 forms a protective cover for the piezoelectric actuator 400, and the piezoelectric actuator 400 is prevented from being damaged due to collision. Meanwhile, the groove bottom of the groove 610 has a certain distance from the piezoelectric actuator 400, and the distance is greater than the distance of downward deformation of the piezoelectric actuator 400 after power-on, so as to avoid interference between the piezoelectric actuator 400 and the reinforcing plate 600 when the piezoelectric actuator 400 deforms downward.

In some embodiments, the reinforcing plate 600 may also be a U-shaped plate, two ends of the U-shaped plate are fixedly connected to the bottoms of two opposite sides of the first substrate 110, and the piezoelectric actuator 400 is located in the middle groove 610 of the U-shaped plate.

The fixing method of the supplementary plate and the first substrate 110 is preferably bonding, and may be welding, which is not limited in this embodiment.

Example two

The embodiment provides an electronic device, which has the camera module in the above, the camera module is installed on the electronic device, and the first substrate 110 in the camera module is electrically connected with the electronic device, so that the electronic device has a camera shooting function. The electronic equipment can be a mobile phone and a tablet personal computer, and can also be equipment such as a game machine and a monitoring camera.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

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

a lens fixed to the first substrate;

2. The camera module of claim 1, wherein the substrate further comprises at least one flexible connecting arm connected between the first and second substrates.

3. The camera module according to claim 2, wherein the substrate is a rigid-flex board, the first substrate and the second substrate are rigid circuit boards, and at least one of the flexible connecting arms is a flexible circuit board.

4. The camera module of claim 2, wherein the plurality of flexible connecting arms are circumferentially arrayed about the second substrate.

5. The camera module according to claim 1, wherein the first substrate is fixed with a pad, and an electrode of the piezoelectric actuator is fixed to the pad by soldering.

6. The camera module of claim 1, further comprising a filter disposed between the lens and the image sensor, wherein the filter is fixed relative to the image sensor.

7. The camera module according to claim 6, wherein a bracket is fixed on the second substrate, and the bracket is fixedly connected with the optical filter.

8. The camera module of claim 7, wherein the holder has a central hole, the filter is fixed in the central hole and located at one end of the central hole, and the other end of the central hole covers the image sensor.

9. The camera module of claim 1, further comprising a stiffener defining a first recess, the stiffener being fixedly coupled to the first base plate and defining the piezoelectric actuator within the first recess.

10. An electronic device comprising the camera module of any one of claims 1-9.