WO2022165654A1

WO2022165654A1 - Detection apparatus, camera module and electronic device

Info

Publication number: WO2022165654A1
Application number: PCT/CN2021/074957
Authority: WO
Inventors: 谢岳霖
Original assignee: 欧菲光集团股份有限公司; 南昌欧菲光电技术有限公司
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2022-08-11

Abstract

A detection apparatus (100), comprising a displacement detection assembly (110) and a positioning assembly (120), wherein the displacement detection assembly (110) comprises a displacement sensor (111) and a magnetic railing ruler (112) or a grating ruler (112), the displacement sensor (111) and one of the magnetic railing ruler (112) and the grating ruler (112) are fixedly arranged on a movement path (210) of a lens assembly (200), and the displacement sensor (111) and the other one of the magnetic railing ruler (112) and the grating ruler (112) are configured to be capable of moving synchronously with the lens assembly (200), such that the displacement sensor (111) can detect the displacement of the lens assembly (200) on the movement path (210); and the positioning assembly (120) comprises a distance sensor (121) and a signal element (122), one of the distance sensor (121) and the signal element (122) is fixedly arranged at a starting point or an ending point of the movement path (210), and the other one of the distance sensor (121) and the signal element (122) is configured to be capable of moving synchronously with the lens assembly (200), such that the distance sensor (121) can detect the distance between the lens assembly (200) and the starting point or the ending point of the movement path (210). Further disclosed are a camera module (10) and an electronic device.

Description

Detection device, camera module and electronic equipment

technical field

The present invention relates to the technical field of optical element detection, in particular to a detection device, a camera module and an electronic device.

Background technique

With the development of technology, camera modules with zoom function are more and more widely used. The camera module with the optical zoom function can move the lens assembly in the camera module to realize the zoom function, and in this process, the displacement of the lens assembly needs to be detected. In the traditional technology, displacement sensors are generally used to detect the displacement of the lens assembly to realize the detection of the displacement. However, in this method, there is a situation where the zero position error occurs in the case of external shock or power failure, resulting in incorrect measurement data. .

SUMMARY OF THE INVENTION

According to various embodiments of the present application, a detection device, a camera module, and an electronic device are provided.

In a first aspect, an embodiment of the present application provides a detection device for detecting the displacement of a lens assembly, including: a displacement detection assembly, including a displacement sensor and a magnetic scale or a grating, a displacement sensor and a magnetic scale or a grating One of the two is fixedly arranged on the moving path of the lens assembly, and the other one of the displacement sensor and the magnetic scale or the grating scale is configured to be able to move synchronously with the lens assembly, so that the displacement sensor can detect the movement of the lens assembly. Displacement on the moving path; positioning components, including a distance sensor and a signal element, one of the distance sensor and the signal element is fixed at the start or end of the moving path, the other of the distance sensor and the signal element is configured to move synchronously with the lens assembly so that the distance sensor can detect the distance of the lens assembly from the start or end of the movement path.

In a second aspect, an embodiment of the present application provides a camera module, including: a lens assembly having a moving path, and the lens assembly is configured to be able to move along the moving path; the detection device is as described above.

In a third aspect, an embodiment of the present application provides an electronic device, including the above-mentioned camera module.

The details of one or more embodiments of the invention are set forth in the accompanying drawings and the description below. Other features, objects and advantages of the present invention will become apparent from the description, drawings and claims.

Description of drawings

In order to better describe and illustrate embodiments and/or examples of those inventions disclosed herein, reference may be made to one or more of the accompanying drawings. The additional details or examples used to describe the drawings should not be construed as limiting the scope of any of the disclosed inventions, the presently described embodiments and/or examples, and the best mode presently understood of these inventions.

1 is a schematic diagram of the overall structure of a detection device provided by an embodiment of the present application;

2 is a schematic structural diagram of a camera module provided by an embodiment of the present application;

3 is an exploded view of the structure of a camera module provided by an embodiment of the application at an angle;

4 is an exploded view of the structure of a camera module provided by an embodiment of the application at another angle;

FIG. 5 is a schematic diagram of a connection relationship among a base, a flexible circuit board, a distance sensor, and a displacement sensor in a camera module according to an embodiment of the present application.

Detailed ways

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the related drawings. The preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the present disclosure is provided.

It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "inner", "outer", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.

Referring to FIG. 1 , an embodiment of the present application proposes a detection device 100 for detecting the displacement of a lens assembly. The detection device 100 includes a displacement detection assembly 110 for detecting the displacement of the lens assembly and a displacement detection assembly 110 for detecting the distance of the lens assembly. The positioning component 120 of the distance of the start or end point of the zoom movement.

Please refer to FIG. 2 to FIG. 4 together, wherein the lens assembly 200 has a moving path 210 . Optical zoom is produced by changing the positions of the lens, the object and the focal point. Therefore, the focal length of the lens can be changed by changing the relative positions of the lenses in the zoom lens. During this process, the changed position of the lens assembly 200 will move in a specific direction, and the moving path is the moving path 210 of the lens assembly 200 . The displacement detection assembly 110 is used to detect the displacement of the lens assembly 200 on the moving path 210 . Specifically, the displacement detection assembly 110 includes a displacement sensor 111 and a magnetic scale 112 or a grating scale 112 , and one of the displacement sensor 111 and the magnetic scale 112 or the grating scale 112 is fixedly disposed on the moving path 210 of the lens assembly 200 , the displacement sensor 111 and the other of the magnetic scale 112 or the grating scale 112 are configured to be able to move synchronously with the lens assembly 200 , so that the displacement sensor 111 can detect the displacement of the lens assembly 200 on the moving path 210 . That is, in the displacement detection assembly 110, the displacement sensor 111 may be fixedly arranged, and the magnetic scale 112 or the scale 112 may be configured to move synchronously with the lens assembly 200, or the magnetic scale 112 or the scale 112 may be fixedly arranged, and at the same time The displacement sensor 111 is configured to be able to move synchronously with the lens assembly 200 . The magnetic scale 112 records magnetic signals with equal spacing and alternating positive and negative polarities. When the displacement sensor 111 moves relative to the magnetic scale 112, an inductance signal will be generated due to the change of the magnetic flux, which can be realized by detecting the inductance signal. displacement detection. The grating ruler 112 is staggeredly engraved with transparent engraved lines and opaque engraved lines with equal spacing. When the displacement sensor 111 moves relative to the grating ruler 112, moire fringes will be generated due to the interference of light, and the moire fringes will be converted into electrical signals. Then, displacement detection can be realized by detecting the electrical signal. Using the displacement sensor 111 in conjunction with the magnetic grating ruler 112 or the grating ruler 112 for displacement detection has the characteristics of large detection range, high detection accuracy and fast response speed, which can improve the detection accuracy and detection efficiency of the detection device.

The positioning assembly 120 is used to determine the zero point of the displacement of the lens assembly 200 to position the lens assembly 200 . Specifically, the positioning assembly 120 includes a distance sensor 121 and a signal element 122 , and one of the distance sensor 121 and the signal element 122 is fixedly arranged At the starting point A or the ending point B of the moving path 210 , the other one of the distance sensor 121 and the signal element 122 is configured to be able to move synchronously with the lens assembly 200 . That is, in the positioning assembly 120 , the distance sensor 121 may be fixedly disposed at the starting point A or the ending point B of the moving path 210 , while the signal element 122 moves synchronously with the lens assembly 200 , or the signal element 122 may be fixedly disposed at the moving path 210 . At the starting point A or the ending point B, the distance sensor 121 moves synchronously with the lens assembly 200 . The principle of the positioning component 120 detecting the distance is that the signal element 122 emits a signal to the surroundings, and the distance sensor 121 determines the distance between the distance sensor 121 and the signal element 122 according to the signal strength sensed by the distance sensor 121 . The signal emitted by the signal element 122 may be an optical signal, an electrical signal, a thermal signal, etc. Therefore, there are also various types of the signal element 122 and the distance sensor 121, which are not limited here. By disposing one of the distance sensor 121 and the signal element 122 at the starting point A or the ending point B of the moving path 210, and the other is configured to be able to move synchronously with the lens assembly 200, the distance sensor 121 can detect the lens The distance of the component 200 from the start point A or the end point B of the movement path 210 .

Based on the detection device 100 of the embodiment of the present application, one of the displacement sensor 111 and the magnetic grating ruler 112 or the grating ruler 112 in the displacement detection assembly 110 is fixedly arranged on the moving path 210 of the lens assembly 200 , and the other is It is configured to be able to move synchronously with the lens assembly 210 , so that the displacement of the lens assembly 210 can be detected, and a positioning assembly 120 is also provided. At the starting point A or the ending point B of the moving path 210, the signal element 122 or the distance sensor 121 is configured to be able to move synchronously with the lens assembly 200, so that the distance between the lens assembly 200 and the starting point A or the ending point B of the moving path 210 can be detected, that is, the lens assembly 200 distance from zero. Even if the position of the zero point is wrong in the detection process of the displacement detection assembly 110 , the lens assembly 200 can be repositioned by means of the positioning assembly 120 to ensure the accuracy of the displacement detection of the lens assembly 200 .

In order to improve the positioning accuracy of the positioning assembly 120, in one embodiment, the positioning assembly 120 includes two distance sensors 121 and two signal elements 122, one of the two distance sensors 121 and the two signal elements 122 is respectively Disposed at the starting point A and the ending point B of the moving path 210 , the other one of the two distance sensors 121 and the two signal elements 122 is configured to be able to move synchronously with the lens assembly 200 , and each signal element 122 is associated with each distance sensor 122 . The sensors 121 are arranged in a one-to-one correspondence. For example, a distance sensor 121 may be provided at the starting point A and the end point B of the moving path 210, respectively, and the two signal elements 122 move synchronously with the lens assembly 200 and are respectively disposed corresponding to the two distance sensors 121, or the moving path 210 A signal element 122 is respectively set at the starting point A and the end point B of the lens assembly 200 , and the two distance sensors 121 move synchronously with the lens assembly 200 and are respectively set corresponding to the two signal elements 122 . Two sets of mutually matched distance sensors 121 and signal elements 122 are used, which are respectively disposed at the starting point A and the ending point B of the moving path 210 of the lens assembly 200. During the zooming process of the lens assembly 200, it can be positioned from both ends, respectively. And the combination of two sets of data can play a role in mutual correction, multiple confirmation, and higher positioning accuracy.

As mentioned above, according to the different types of signals emitted by the signal element 122, the signal element 122 and the distance sensor 121 also have various types. In this embodiment, the distance sensor 121 is a Hall sensor, and the signal element 122 is a Magnetic parts. There is a magnetic field around the magnetic element, and the Hall sensor will generate a voltage output due to the Hall effect under the action of the magnetic field, and the output voltage changes linearly with the input magnetic field strength. When the distance between the Hall sensor and the magnetic element changes, The strength of the magnetic field at the location of the Hall sensor changes, so its output voltage also changes. Accordingly, the distance between the Hall sensor and the magnetic element can be detected according to the change of the output voltage of the Hall sensor. In the positioning assembly 120, the Hall sensor and the magnetic element are used to complete the distance detection, which has the advantages of simple structure, small size, good linearity, high precision, and large detection range, and can improve the detection accuracy and detection efficiency of the detection device.

Please refer to FIG. 3 and FIG. 4 , in one embodiment, the detection device 100 further includes a base 130 . The base 130 can provide an installation space for the displacement detection component 110 and the positioning component 120 . The base 130 is provided with an accommodating cavity 133 for accommodating the lens assembly 200 , and the movement path 210 is located in the accommodating cavity 133 . The shapes and sizes of the base 130 and the accommodating cavity 133 are not limited. The accommodating cavity 133 provides a moving space for the lens assembly 200. By arranging the base 130, the detection process of the detection device can be completed in the accommodating cavity 133 of the base 130, which is beneficial to reduce the interference of the external environment and external components and ensure the detection The process went smoothly.

Specifically, the base 130 includes a bottom plate 131 and two side plates 132 respectively disposed on opposite sides of the bottom plate 131 . The bottom plate 131 and the two side plates 132 together define a accommodating cavity 133 . The starting point A of the moving path 210 is the same as the The end point B is located at the connection between the two side plates 132 and the bottom plate 131 respectively, and the moving path 210 is arranged along the extending direction of the bottom plate 131 . The structure of the base 130 is simple, the processing and manufacturing are convenient, and the starting point A and the ending point B of the moving path 210 are located at the connection between the two side plates 132 and the bottom plate 131 respectively, then when the lens assembly 200 moves along the moving path 210, it is The movement along the extension direction of the base plate 131 is beneficial to the installation of the components in the displacement detection assembly 110 and the positioning assembly 120 , and also facilitates the detection of the displacement of the lens assembly 200 .

In the process of detecting the displacement of the lens assembly 200 , when the position of the zero point is wrong, the lens assembly 200 can be repositioned by the positioning assembly 120 . At this time, the lens assembly 200 needs to be moved to the position of the positioning assembly 120 . Therefore, in one of the embodiments, a drive assembly 140 is further included, and the drive assembly 140 is configured to drive the lens assembly 200 to move along the movement path 210 . By setting the drive assembly 140 to drive the lens assembly 200 to move, the position of the lens assembly 200 can be adjusted with the help of the drive assembly 140, so that the lens assembly 200 can be quickly moved to the detection range of the positioning assembly 120 for repositioning, and it is also convenient for The position of the lens assembly 200 is quickly adjusted during multiple inspections to improve inspection efficiency.

Specifically, the driving assembly 140 includes a driving shaft 141 , the driving shaft 141 is located in the accommodating cavity 133 , two ends of the driving shaft 141 are respectively connected with the two side plates 132 , and the driving shaft 141 is arranged along the moving path 210 . By connecting the two ends of the drive shaft 141 in the drive assembly 140 to the two side plates 132 respectively, and the drive shaft 141 is disposed along the moving path 210, the drive shaft 141 can directly drive the lens assembly 200 to move along the moving path 210, and the structure Simple and easy to install.

Referring to FIGS. 2 to 5 , an embodiment of the present application further provides a camera module 10 . The camera module 10 includes a lens assembly 200 and the detection device 100 described in any of the above embodiments. The lens assembly 200 has a moving path 210, and the lens assembly 200 is configured to be able to move along the moving path 210 for zooming.

Based on the camera module 10 of the embodiment of the present application, one of the displacement sensor 111 and the magnetic grating ruler 112 or the grating ruler 112 in the displacement detecting assembly 110 is fixedly arranged on the moving path 210 of the lens assembly 200 , and the other Or is configured to be able to move synchronously with the lens assembly 210 , the displacement of the lens assembly 210 can be detected, and a positioning assembly 120 is also provided. At the starting point A or the ending point B of the moving path 210, the signal element 122 or the distance sensor 121 is configured to be able to move synchronously with the lens assembly 200, so that the distance between the lens assembly 200 and the starting point A or the ending point B of the moving path 210 can be detected, that is, the lens assembly 200 Distance from zero. Even if the position of the zero point is wrong in the detection process of the displacement detection assembly 110 , the lens assembly 200 can be repositioned by means of the positioning assembly 120 to ensure the accuracy of the displacement detection of the lens assembly 200 .

As shown in FIG. 3 and FIG. 4 , specifically, the distance sensor 121 in the positioning assembly 120 is fixedly disposed on the surface of one of the side plates 132 of the base 130 facing the accommodating cavity 133 , and the distance sensor 121 is located directly on the surface of the bottom plate 131 . The projection is located at the starting point A or the ending point B of the moving path 210 , the signal element 122 is disposed on the surface of the lens assembly 200 facing the distance sensor 121 and can move synchronously with the lens assembly 200 , and the distance sensor 121 is opposite to the signal element 122 . By disposing the distance sensor 121 on the side plate 132 of the base 130 and disposing the signal element 122 on the surface of the lens assembly 200 facing the distance sensor 121, the positioning assembly 120 can be easily installed, and can directly and real-timely monitor the lens assembly 200. The distance from the start point A or the end point B of the movement path 210 is detected.

At the same time, the displacement sensor 111 in the displacement detection assembly 110 is fixedly disposed on the surface of the base plate 131 facing the accommodating cavity 133 , and the magnetic scale 112 or the grating scale 112 is disposed on the surface of the lens assembly 200 facing the base plate 131 and can follow the lens assembly. 200 moves synchronously, and the displacement sensor 111 is arranged opposite to the magnetic scale 112 or the grating scale 112 . By disposing the displacement sensor 111 on the bottom plate 131 of the base 130, and disposing the magnetic scale 112 or the grating scale 112 on the surface of the lens assembly 200 facing the bottom plate 131, the displacement detection assembly 110 can be easily installed and can be directly and in real time. The displacement of the lens assembly 200 on the movement path 210 is detected.

In order to improve the degree of automation in the detection of the displacement of the lens assembly 200 in the camera module 10, in one embodiment, the camera module 10 further includes a controller and a circuit board 300, and the controller communicates with the distance sensor 121 and the distance sensor 121 and the distance sensor 121 respectively through the circuit board 300. The displacement sensor 111 is electrically connected to receive detection data of the detection device 100 . By arranging a controller that is electrically connected to the distance sensor 121 and the displacement sensor 111 respectively, the detection data from the distance sensor 121 and the displacement sensor 111 can be received, and the displacement detection component 110, the positioning component 120 and other related components can be controlled according to the detection data. Cooperate with action. For example, the controller may be electrically connected to the driving assembly 140 to control the driving assembly 140 to adjust the position of the lens assembly 200 , so as to quickly move the lens assembly 200 to within the detection range of the positioning assembly 120 for repositioning.

Please refer to FIG. 5 together. In one embodiment, the circuit board 300 is a flexible circuit board 300 . The flexible printed circuit board 300 (Flexible Printed Circuit, FPC) is a highly reliable and excellent flexible printed circuit board 300 made of polyimide or polyester film as a base material. The flexible circuit board 300 includes a first segment 310 and a second segment 320 that are connected to each other. The first segment 310 is attached to the surface of the side plate 132 facing the accommodating cavity 133 and is electrically connected to the distance sensor 121. The second segment 320 is attached to the The bottom plate 131 is electrically connected to the displacement sensor 111 . The flexible circuit board 300 has the characteristics of high wiring density, light weight, thin thickness, and good bendability. The flexible circuit board 300 is used to realize the electrical connection between the controller and the distance sensor 121 and the displacement sensor 111, which can easily realize the flexible circuit board. The adhesion of 300 to the side plate 132 and the bottom plate 131 is beneficial to improve the structural integrity of the camera module 10 and reduce the difficulty of its assembly. It should be noted that the first segment 310 and the second segment 320 are two segments divided on the flexible circuit board 300 according to the different connection positions, and in the actual structure of the flexible circuit board 300 , they may not be used to distinguish The boundary line between the first segment 310 and the second segment 320 , that is, the first segment 310 and the second segment 320 are integrated, and the area and size of the first segment 310 and the second segment 320 are not fixed, but can be It changes instantaneously with different connection positions, wherein the first segment 310 is attached to the surface of the side plate 132 , and the second segment 320 is attached to the bottom plate 131 .

In one embodiment, the second segment 320 is attached to the surface of the bottom plate 131 facing away from the accommodating cavity 133 , the bottom plate 131 is provided with a first opening 1311 penetrating the bottom plate 131 at the connection with the side plate 132 , and the flexible circuit board 300 The connecting section 330 is also included, and the connecting section 330 passes through the first opening 1311 to connect the first section 310 and the second section 320 . By attaching the second section 320 to the surface of the bottom plate 131 facing away from the receiving cavity 133 , and passing the connecting section 330 through the first opening 1311 to connect the first section 310 and the second section 320 , the flexible circuit board 300 and the second section 320 are realized. The positioning and connection between the bases 130 do not require additional connecting parts, which reduces the difficulty of assembling the flexible circuit board 300 .

When the second segment 320 is attached to the surface of the bottom plate 131 away from the accommodating cavity 133 , in order to enable the displacement detection assembly 110 to better perform the displacement detection operation, the bottom plate 131 is provided with a second opening corresponding to the displacement sensor 111 penetrating the bottom plate 131 . The second section 320 covers the second opening 1312 , the second section 320 and the second opening 1312 together define a receiving cavity 1313 , the displacement sensor 111 is received in the receiving cavity 1313 , and the second section 320 carries the displacement sensor 111 . By opening the second opening portion 1312 on the bottom plate 131 and making the second segment 320 cover the second opening portion 1312 to form a receiving cavity 1313 to accommodate the displacement sensor 111, it is ensured that the displacement sensor 111 in the displacement detection assembly 110 can be displaced normally During the detection operation, the occupation of the inner space of the base 130 can also be reduced, the size of the camera module 10 can be reduced, and the miniaturization of the camera module 10 can be realized.

The embodiment of the present application provides an electronic device, and the electronic device includes the camera module 10 as described above. The electronic device is any device with the function of acquiring images, for example, it can be any one of the wearable devices such as mobile phones, tablet computers, notebook computers, personal digital assistants, smart bracelets, smart watches, etc. The camera module 10 cooperates with the electronic device. Realize the image acquisition and reproduction of the target object. Based on the electronic device according to the embodiment of the present application, displacement detection and repositioning of the lens assembly 200 in the electronic device can be performed by means of the positioning assembly 120 , so as to ensure the accuracy of the displacement detection of the lens assembly 200 .

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Rear, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial, The orientations or positional relationships indicated by "radial direction", "circumferential direction", etc. are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated devices or elements. It must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between the two elements, unless otherwise specified limit. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may be in direct contact between the first and second features, or the first and second features indirectly through an intermediary touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be determined by the appended claims.

Claims

A detection device for detecting the displacement of a lens assembly, characterized in that it includes:

A displacement detection assembly, including a displacement sensor and a magnetic grating ruler or a grating ruler, one of the displacement sensor and the magnetic grating ruler or the grating ruler is fixedly arranged on the moving path of the lens assembly, the The other of the displacement sensor and the magnetic scale or the scale is configured to move synchronously with the lens assembly so that the displacement sensor can detect the movement of the lens assembly on the movement path. displacement;

A positioning component includes a distance sensor and a signal element, one of the distance sensor and the signal element is fixedly arranged at the starting point or the end point of the moving path, and one of the distance sensor and the signal element is fixed at the starting point or the end point of the moving path. The other of the is configured to move synchronously with the lens assembly to enable the distance sensor to detect the distance of the lens assembly from the start or end of the movement path.
The detection device according to claim 1, wherein the positioning assembly comprises two of the distance sensors and two of the signal elements, and one of the two distance sensors and the two signal elements One is disposed at the start point and the end point of the moving path, the other of the two distance sensors and the two signal elements are configured to be able to move synchronously with the lens assembly, and each The signal elements are arranged in a one-to-one correspondence with each of the distance sensors.
The detection device according to claim 1, wherein the distance sensor is a Hall sensor, and the signal element is a magnetic element.
The detection device according to claim 1, further comprising a base, the base is provided with an accommodating cavity for accommodating the lens assembly, and the accommodating cavity provides a moving space for the lens assembly.
The detection device according to claim 4, wherein the base comprises a bottom plate and two side plates respectively disposed on opposite sides of the bottom plate, and the bottom plate and the two side plates together enclose The accommodating cavity is provided, and the starting point and the ending point of the moving path are respectively located at the connection between the two side plates and the bottom plate.
The detection device of claim 5, further comprising a drive assembly configured to drive the lens assembly to move along the movement path.
The detection device according to claim 6, wherein the drive assembly comprises a drive shaft, the drive shaft is located in the accommodating cavity, and two ends of the drive shaft are respectively connected to the two side plates, And the drive shaft is arranged along the moving path.
A camera module, comprising:

a lens assembly having a movement path, the lens assembly being configured to move along the movement path;

The detection device according to any one of claims 1 to 7.
The camera module according to claim 8, wherein the detection device further comprises a base, the base comprises a bottom plate and two side plates respectively disposed on opposite sides of the bottom plate, the The bottom plate and the two side plates jointly define an accommodating cavity for accommodating the lens assembly, and the starting point and the end point of the moving path are respectively located at the junctions of the two side plates and the bottom plate;

The distance sensor is fixedly arranged on the surface of one of the side plates facing the accommodating cavity, and the orthographic projection of the distance sensor on the surface of the bottom plate is located at the starting point or the end point of the moving path, and the signal element It is disposed on the surface of the lens assembly facing the distance sensor and can move synchronously with the lens assembly, and the distance sensor is disposed opposite to the signal element.
The camera module according to claim 9, wherein the displacement detection component comprises a displacement sensor and a magnetic grating scale or a grating scale, the displacement sensor is fixedly arranged on the surface of the bottom plate facing the accommodating cavity, The magnetic grating scale or the grating scale is arranged on the surface of the lens assembly facing the base plate and can move synchronously with the lens assembly, and the displacement sensor is opposite to the magnetic grating scale or the grating scale set up.
The camera module of claim 10, further comprising a controller and a circuit board, the controller is electrically connected to the distance sensor and the displacement sensor respectively through the circuit board to receive the detection device detection data.
The camera module of claim 11, wherein the circuit board is a flexible circuit board, the flexible circuit board comprises a first section and a second section that are connected to each other, and the first section is attached to the The surface of the side plate facing the accommodating cavity is electrically connected with the distance sensor, and the second segment is attached to the bottom plate and is electrically connected with the displacement sensor.
The camera module according to claim 12, wherein the second segment is attached to a surface of the bottom plate facing away from the accommodating cavity, and a through hole is formed on the bottom plate at the connection with the side plate. In the first opening of the bottom plate, the flexible circuit board further includes a connecting section, and the connecting section passes through the first opening to connect the first section and the second section.
14. The camera module according to claim 13, wherein a second opening is formed on the bottom plate corresponding to the displacement sensor and penetrates through the bottom plate, and the second section covers the second opening, so The second section and the second opening together define a receiving cavity, the displacement sensor is received in the receiving cavity, and the second section carries the displacement sensor.
An electronic device, characterized by comprising the camera module according to any one of claims 8 to 14.