CN113747147A

CN113747147A - Camera module testing equipment and camera module testing method

Info

Publication number: CN113747147A
Application number: CN202110947080.1A
Authority: CN
Inventors: 杨小刚
Original assignee: Honor Device Co Ltd
Current assignee: Beijing Honor Device Co Ltd
Priority date: 2021-08-17
Filing date: 2021-08-17
Publication date: 2021-12-03
Anticipated expiration: 2041-08-17
Also published as: CN113747147B

Abstract

The application discloses camera module testing equipment and a camera module testing method, relates to the technical field of camera module testing equipment, and can be used for bending test research on a flexible circuit board of a camera module. The camera module testing equipment comprises a bending device, a detection device and/or a testing device, wherein the bending device is configured to be capable of bending and unfolding the flexible circuit board; the detection device comprises a driving module and a processing module, wherein the driving module is configured to be electrically connected with the connecting end and used for driving the camera to work; the processing module is configured to be electrically connected with the connecting end for detecting whether the connecting end outputs a target image signal; the testing device is configured to be electrically connected with the connecting end for acquiring target electrical parameters of the camera module. This application can be used to the flexible circuit board of camera module to buckle the test research.

Description

Camera module testing equipment and camera module testing method

Technical Field

The application relates to the technical field of camera module testing equipment, in particular to camera module testing equipment and a camera module testing method.

Background

With the popularization of terminal devices such as mobile phones and tablet computers, people pay more and more attention to the image pickup function in the terminal devices, and the failure of the image pickup function also becomes one of the main problems affecting the user experience. In the terminal equipment, the camera is usually connected with the main board through the flexible circuit board, and the flexible circuit board of the camera needs to be bent for many times in the assembling process of the terminal equipment, so that the flexible circuit board is easy to break and tear, and the function failure of the camera module is caused.

Therefore, it is very important to perform bending test on the flexible circuit board of the camera in the production process of the terminal device.

Disclosure of Invention

The embodiment of the application provides camera module testing equipment and a camera module testing method, which can be used for carrying out bending test research on a flexible circuit board of a camera module.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in a first aspect, an embodiment of the present application provides a camera module testing apparatus, where the camera module includes a camera and a flexible circuit board having one end connected to the camera, and the other end of the flexible circuit board is a connection end, the camera module testing apparatus includes a bending device, and a detection device and/or a testing device, and the bending device is configured to bend and unfold the flexible circuit board; the detection device comprises a driving module and a processing module, wherein the driving module is configured to be electrically connected with the connecting end for driving the camera to work; the processing module is configured to be electrically connected with the connecting terminal for detecting whether the connecting terminal outputs a target image signal; the testing device is configured to be electrically connected with the connecting end so as to be used for acquiring target electrical parameters of the camera module.

By adopting the scheme, the influence of the bending times of the flexible circuit board on the image output of the camera and the target electrical parameters of the camera module can be researched, the data of the bending times of the flexible circuit board when the image output of the camera is abnormal and the target electrical parameters are abnormal are obtained, and a theoretical basis is provided for the design and the assembly of the camera module.

In some embodiments, the processing module is configured to: controlling the bending device to bend the flexible circuit board for preset times; then after the driving module sends a driving signal for driving the camera to work to the connecting end, whether the connecting end outputs the target image signal is detected; and if the target image signal is not detected to be output by the connecting end, recording the times of bending the flexible circuit board by the bending device and/or sending an alarm signal.

By adopting the scheme, the automation level of the camera module testing equipment is improved, and the flexible circuit board is bent and the bending times of the flexible circuit board are recorded without manually controlling the bending device.

In some embodiments, the driving signal includes an activation signal for activating the camera to enter a camera shooting state; the target image signal comprises a video signal, and the video signal comprises a plurality of frame image signals; the processing module is configured to: after the driving module sends the starting signal to the connecting end, whether the connecting end outputs the video signal is detected; and if the video signal output by the connecting end is not detected, recording the times of bending the flexible circuit board by the bending device and/or sending an alarm signal.

Through adopting above-mentioned scheme, can study the influence that the number of times of buckling of flexible circuit board got into the state of making a video recording to the start-up of camera accurately, provide theoretical basis for the design and the equipment of camera.

In some embodiments, the driving signal further includes a photographing signal for photographing the camera; the processing module is configured to: if the video signal is detected to be output by the connecting end, and after the driving module sends the photographing signal to the connecting end, whether the connecting end outputs one or more frames of the image signal is detected; if the connection end outputs one or more frames of image signals, recording the times of bending the flexible circuit board by the bending device and/or sending out an alarm signal.

By adopting the scheme, the influence of the bending times of the flexible circuit board on the picture photographed by the camera can be accurately researched, and a theoretical basis is provided for the design and the assembly of the camera.

In some embodiments, the camera module testing apparatus comprises the processing module and the testing device; the processing module is configured to: controlling the bending device to bend the flexible circuit board for preset times; then, according to the target electrical parameter obtained by the testing device, determining the relation between the target electrical parameter and a preset interval; and if the target electrical parameters are outside the preset interval, recording the times of bending the flexible circuit board by the bending device and/or sending out an alarm signal.

By adopting the scheme, the camera module testing equipment is beneficial to improving the automation level, and the relation between the target electrical parameter and the preset interval does not need to be judged manually, the bending device is controlled to bend the flexible circuit board, and the bending times of the flexible circuit board are recorded.

In some embodiments, the camera module testing apparatus comprises the processing module and the testing device; the processing module is configured to perform the steps of: controlling the bending device to bend the flexible circuit board for preset times; determining the relation between the target electrical parameter and a preset interval according to the target electrical parameter acquired by the testing device; after the driving module sends a driving signal for driving the camera to work to the connecting end, whether the connecting end outputs the target image signal is detected; if the target electrical parameters are outside the preset interval or the target image signals output by the connecting end are not detected, recording the times of bending the flexible circuit board by the bending device and/or sending out alarm signals; if the target electrical parameter is located in the preset interval and the connection end is detected to output the target image signal, the steps are executed in a circulating mode until the target electrical parameter is located outside the preset interval or the connection end is not detected to output the target image signal.

In some embodiments, the connection end comprises a plurality of connection pins; the testing device comprises a power supply unit, a plurality of testing lines, a plurality of grounding lines and a parameter detection unit, wherein first ends of the testing lines are connected with the power supply unit, second ends of the testing lines are configured to be connected with the connecting pins in a one-to-one correspondence manner, and each testing line is provided with a first switch device; one ends of the grounding lines are grounded, the other ends of the grounding lines are configured to be connected with the connecting pins in a one-to-one correspondence manner, and a second switching device is arranged on each grounding line; the parameter detection unit is configured to acquire the target electrical parameter of the connection pin electrically conducted with the power supply unit, wherein the target electrical parameter comprises a pin voltage value and/or a pin current value of the connection pin.

By adopting the scheme, whether the circuit of the flexible circuit board of the camera module is damaged after the flexible circuit board is bent for the preset times can be accurately judged by judging whether the pin voltage value and the pin current value fall into the preset interval.

In some embodiments, the power supply unit includes a constant current source and a constant voltage source, the constant current source is connected to the first ends of the plurality of test lines through a first connection line, and a third switching device is disposed on the first connection line; the constant voltage source is connected with the first ends of the plurality of test lines through a second connecting line, and a fourth switching device is arranged on the second connecting line; the parameter detection unit includes a voltage detection unit configured to acquire the pin voltage value of the connection pin electrically conducted with the constant current source, and a first current detection unit configured to acquire the pin current value of the connection pin electrically conducted with the constant current source.

By adopting the scheme, the detection device can carry out two tests of open short circuit and leakage current on the camera module, so that the influence of the bending times of the flexible circuit board on the target electrical parameters can be more accurately researched.

In some embodiments, the voltage detection unit includes two voltage detection terminals, one of the voltage detection terminals is connected to the first connection line, and the other voltage detection terminal is grounded.

By adopting the scheme, a voltage detection unit does not need to be correspondingly arranged on each test circuit, and the number of the voltage detection units is greatly reduced.

In some embodiments, the first current detection unit is disposed on the second connection line.

By adopting the scheme, the first current detection units do not need to be correspondingly arranged on each test circuit, and the number of the first current detection units is greatly reduced.

In some embodiments, the connection end comprises a plurality of the connection pins, the plurality of connection pins comprising a plurality of input pins; the driving module is configured to be connected with the plurality of input pins in a one-to-one correspondence manner through a plurality of third connecting lines; the test device further comprises a second current detection unit, wherein the second current detection unit is configured to acquire an input current value input to the input pin by the driving module; wherein the target electrical parameter comprises the input current value.

By adopting the scheme, whether the input current value falls into the preset interval or not is judged, and whether the circuit of the flexible circuit board of the camera module is damaged or not after the flexible circuit board is bent for the preset times or not can be accurately judged.

In some embodiments, each of the third connection lines is provided with the second current detection unit.

By adopting the scheme, the second current detection unit can directly acquire the input current value of the input pin by acquiring the current value on the third connecting line, so that the mode of acquiring the input current value by the second current detection unit is simpler.

In some embodiments, a fifth switching device is disposed on each of the third connection lines; the second current detection unit comprises two current detection ends, one current detection end is connected with the plurality of third connecting lines in a one-to-one correspondence mode through a plurality of fourth connecting lines, and a connection point of the fourth connecting lines and the third connecting lines is located between the driving module and the fifth switching device; the other current detection end is configured to be connected with the plurality of input pins in a one-to-one correspondence mode through a plurality of fifth connecting lines; and a sixth switching device is arranged on each fourth connecting line and each fifth connecting line.

By adopting the scheme, the input current value of each input pin can be respectively obtained only by one second current detection unit, so that the number of the second current detection units is greatly reduced.

In some embodiments, the bending device comprises a mounting frame, a camera placing table, a circuit board placing table and a bending driving device, wherein the camera placing table is provided with a camera placing part for placing the camera; the circuit board placing table is relatively fixed with the mounting rack, and is provided with a circuit board placing part for placing the connecting end; the bending driving device is configured to drive the camera placing table to move relative to the circuit board placing table so as to bend and flatten the flexible circuit board.

By adopting the scheme, the connecting end of the flexible circuit board can be prevented from moving in the process of bending and flattening the flexible circuit board, so that the connection stability of the driving module, the detection device and the connecting end of the flexible circuit board is ensured.

In some embodiments, the camera placing part is a placing cavity, and an avoiding opening for the flexible circuit board to extend out and a camera hole for being opposite to a lens of the camera are formed in the cavity wall of the placing cavity.

Through adopting above-mentioned scheme, it can carry out spacing better to the camera to place the chamber like this to can reduce the camera and rock at flexible circuit board bending process.

In some embodiments, a placing groove is formed on the camera placing table; the bending device further comprises a limiting part, and the limiting part is detachably connected with the camera placing table, so that the limiting part and the placing groove form the placing cavity.

By adopting the scheme, the camera can be conveniently placed in the placing cavity.

In some embodiments, the retaining member has a receiving groove formed thereon, and the receiving groove and the placing groove form the placing cavity.

Through adopting above-mentioned scheme, the camera just can partly stretch into the standing groove, and another part stretches into the holding tank, and the degree of depth of standing groove just need not the too big that sets up like this, and the thickness that the platform was placed to the camera is thinner that just can design so.

In some embodiments, the circuit board placing section includes a positioning groove opened on the circuit board placing table and a press-fit member; the pressing piece is detachably connected with the circuit board placing table and used for pressing the connecting end into the positioning groove.

By adopting the scheme, the connecting end of the flexible circuit board can be more firmly fixed on the circuit board placing table.

In some embodiments, the camera module testing apparatus further comprises a test cartridge disposed on the mounting frame, the test cartridge configured to house the drive module and the testing device therein.

By adopting the scheme, the driving module and the testing device can be protected, and the driving module and the testing device can be arranged more compactly.

In some embodiments, the camera module testing device further comprises an adapter circuit board, a first electrical connector and a second electrical connector, wherein the adapter circuit board is arranged between the test box and the circuit board placing table; the first electric connector is used for connecting the adapter circuit board and the test box; the second electrical connector is configured to connect the relay circuit board and the connection terminal.

By adopting the scheme, the connection between the connecting ends of the test box and the flexible circuit board is convenient, and the setting position of the test box is more flexible.

In some embodiments, a plurality of the camera placing parts are arranged on the camera placing table side by side, and a plurality of the circuit board placing parts are correspondingly arranged on the circuit board placing table along the arrangement direction of the plurality of the camera placing parts.

By adopting the scheme, the testing efficiency of the camera module testing equipment can be improved.

In some embodiments, the bending device includes a plurality of pairs of the camera placing stage and the circuit board placing stage; the bending driving device is configured to drive the camera placing tables in each pair to synchronously move relative to the circuit board placing tables so as to bend and flatten the corresponding flexible circuit board.

By adopting the scheme, the test efficiency of the camera module test equipment can be further improved.

In some embodiments, the bending driving device includes a plurality of driving shafts and a driving motor, and the plurality of driving shafts are rotatably disposed on the mounting frame and are connected with the plurality of camera placing tables in a one-to-one correspondence manner; the driving motor is arranged on the mounting frame and can drive the driving shafts to synchronously rotate through the transmission mechanism so as to drive the camera placing tables to oppositely correspond to the circuit board placing tables to turn over, and the flexible circuit board arranged on the camera placing tables is bent.

Through adopting above-mentioned scheme, can make like this that the shared space of motion trail of camera placing platform is littleer, can make the mechanism of buckling compacter like this.

In some embodiments, the drive mechanism is a synchronous belt drive mechanism or a chain drive mechanism.

Through adopting above-mentioned scheme, can make driving motor can accurate drive a plurality of cameras place the platform and overturn the same angle like this to guarantee the synchronous of a plurality of flexible circuit boards and buckle and expand.

In a second aspect, an embodiment of the present application provides a method for testing a camera module, where the camera module includes a camera and a flexible circuit board having one end connected to the camera, and the other end of the flexible circuit board is a connection end, and the method includes: bending the flexible circuit board for preset times and sending a driving signal for driving the camera to work to the connecting end; then, detecting whether the connecting end outputs a target image signal; and if the target image signal is not detected to be output by the connecting end, recording the bending times of the flexible circuit board and/or sending an alarm signal.

By adopting the scheme, the influence of the bending times of the flexible circuit board on the image output of the camera can be accurately researched, and a theoretical basis is provided for the design and the assembly of the camera.

In some embodiments, after bending the flexible circuit board for the preset number of times, the method for testing the camera module includes: sending a starting signal for starting the camera to enter a camera shooting state to the connecting end; wherein the drive signal comprises the start signal; then, whether the connection end outputs a video signal is detected; wherein the target image signal comprises the video signal, the video signal comprising a number of frames of image signals; and if the video signal output by the connecting end is not detected, recording the bending times of the flexible circuit board and/or sending an alarm signal.

In some embodiments, if it is detected that the connection terminal outputs the video signal, the method for testing the camera module further includes: sending a photographing signal for enabling the camera to photograph to the connecting end; wherein the driving signal comprises the photographing signal; then, detecting whether the connecting end outputs one or more frames of image signals; if the connection end is not detected to output one or more frames of the image signals, the bending times of the flexible circuit board are recorded and/or an alarm signal is sent out.

In a third aspect, an embodiment of the present application provides a method for testing a camera module, where the camera module includes a camera and a flexible circuit board having one end connected to the camera, and the other end of the flexible circuit board is a connection end, and the method includes: bending the flexible circuit board for a preset number of times; then acquiring target electrical parameters of the camera module; and determining the relation between the target electrical parameter and the preset interval according to the obtained target electrical parameter, and recording the bending times of the flexible circuit board and/or sending an alarm signal if the target electrical parameter is positioned outside the preset interval.

By adopting the scheme, the influence of the bending times of the flexible circuit board on the target electrical parameters of the camera module can be accurately researched, and a theoretical basis is provided for the design and assembly of the camera.

In a third aspect, an embodiment of the present application provides a method for testing a camera module, where the camera module includes a camera and a flexible circuit board having one end connected to the camera, and the other end of the flexible circuit board is a connection end, and the method includes: bending the flexible circuit board for a preset number of times; acquiring a target electrical parameter of the camera module, and determining the relation between the target electrical parameter and a preset interval according to the acquired target electrical parameter; after a driving signal for driving the camera to work is input to the connecting end, whether the connecting end outputs a target image signal is detected; if the target electrical parameters are outside the preset interval or the target image signals output by the connecting end are not detected, recording the bending times of the flexible circuit board and/or sending out alarm signals; if the target electrical parameter is located in the preset interval, or the connecting end is detected to output the target image signal, the steps are executed in a circulating mode until the target electrical parameter is located outside the preset interval, or the connecting end is not detected to output the target image signal.

By adopting the scheme, the influence of the bending times of the flexible circuit board on the image output of the camera and the target electrical parameters can be accurately researched, and a theoretical basis is provided for the design and assembly of the camera.

Drawings

FIG. 1 is a functional block diagram of a camera module testing device in some embodiments of the present application;

fig. 2 is a test flowchart of the camera module test apparatus shown in fig. 1;

FIG. 3 is a schematic view of a test apparatus coupled to a camera module according to some embodiments of the present disclosure;

FIG. 4 is a schematic view of a drive module coupled to a camera module according to some embodiments of the present disclosure;

FIG. 5 is a schematic diagram of a connection between a driver module and a camera module according to further embodiments of the present disclosure;

FIG. 6 is a flowchart of the steps performed by the processing module of FIG. 1;

FIG. 7 is a schematic block diagram of a camera module testing apparatus according to further embodiments of the present disclosure;

FIG. 8 is a flowchart illustrating the testing process of the camera module testing apparatus shown in FIG. 7;

FIG. 9 is a flowchart of the steps performed by the processing module of FIG. 7;

FIG. 10 is a functional block diagram of a camera module testing apparatus according to further embodiments of the present disclosure;

fig. 11 is a test flowchart of the camera module testing apparatus in fig. 10;

FIG. 12 is a flowchart of the steps performed by the processing module of FIG. 10;

fig. 13 is a flowchart of a method for testing a camera module according to some embodiments of the present disclosure;

fig. 14 is a flowchart of a method for testing a camera module according to another embodiment of the present disclosure;

fig. 15 is a flowchart of a method for testing a camera module according to another embodiment of the present application;

FIG. 16 is a schematic structural diagram of a camera module testing apparatus according to some embodiments of the present disclosure;

fig. 17 is an exploded view of the camera module testing apparatus of fig. 16;

FIG. 18 is a schematic view of a bending mechanism according to some embodiments of the present application from a perspective;

FIG. 19 is a schematic view of another alternative embodiment of a bending mechanism of the present application from another perspective;

fig. 20 is a schematic structural view of the camera mounting table and the circuit board mounting table in fig. 18;

fig. 21 is an exploded view of the camera mounting station of fig. 20;

FIG. 22 is a schematic structural diagram of the limiting element in FIG. 21;

fig. 23 is a schematic view showing the structure of the circuit board placing table in fig. 21;

FIG. 24 is an enlarged partial view of FIG. 23;

FIG. 25 is a schematic structural view of the crimp member of FIG. 23;

fig. 26 is a schematic structural view of the circuit board placing table of fig. 24 with the camera module removed;

FIG. 27 is a schematic view of the second electrical connector of FIG. 26;

FIG. 28 is an exploded view of the circuit board placement station, the adapter circuit board, and the test cassette of FIG. 19;

fig. 29 is a schematic structural view of the adapting circuit board in fig. 26;

FIG. 30 is a schematic view of the structure of the test cassette of FIG. 26.

Detailed Description

In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

The camera module test equipment in the embodiment of the application can be used for bending the flexible circuit board of the camera module, researching the influence of the bending times of the flexible circuit board of the camera module on the image output of the camera and the target electrical parameters of the camera module, and providing a theoretical basis for the design and the assembly of the camera module.

As shown in fig. 1, fig. 1 is a schematic block diagram of a camera module testing apparatus in some embodiments of the present application. The camera module 100 includes a camera 110 and a flexible circuit board 120 having one end connected to the camera 110, the other end of the flexible circuit board 120 is a connection end 121, the connection end 121 includes a plurality of connection pins, and the plurality of connection pins include a plurality of input pins and a plurality of output pins.

The camera module testing equipment comprises a bending device 1, a detecting device 2 and a testing device 3.

The bending device 1 includes an electrical control module 11 and a bending mechanism 12, the bending mechanism 12 is configured to bend and unfold the flexible circuit board 120, and the electrical control module is configured to control the number of bending times of the bending mechanism 12 and the start and stop of the bending action of the bending mechanism 12.

The detection device 2 includes a driving module 21 and a processing module 22, wherein the driving module 21 is configured to be electrically connected to a plurality of input pins of the connection terminal 121 for driving the camera 110 to operate. Illustratively, the driving module 21 is a driving circuit of the camera 110.

The driving module 21 may send a driving signal for driving the camera 110 to work to the connection end 121, where the driving signal includes a start signal for starting the camera 110 to enter a shooting state and a shooting signal for enabling the camera 110 to shoot. When the camera 110 needs to enter a camera shooting state from a standby state, the driving module 21 may send a start signal to the connection end 121 of the flexible circuit board 120, so that the camera 110 enters the camera shooting state; in the shooting state, if the user needs to take a picture, the driving module 21 can send a shooting signal to the connecting end 121 of the flexible circuit board 120, and the camera 110 can take a picture.

It should be noted that: the standby state is a state in which the driving module 21 supplies power to the image sensor of the camera 110, and the image sensor of the camera 110 receives external light input from the lens of the camera 110, but does not output an image signal. The image capturing state is a state in which the image sensor of the camera 110 receives external light input by the lens of the camera 110 and outputs a video signal.

The processing module 22 is configured to be electrically connected to a plurality of output pins of the connection terminal 121 for detecting whether the connection terminal 121 outputs the target image signal. As shown in fig. 1, the processing module 22 may be a software module of a computer, but is not limited thereto, and the processing module 22 may also be a software module of other terminal devices, such as a software module of a mobile phone.

The testing device 3 is configured to be electrically connected with a plurality of connection pins of the connection terminal 121 for acquiring a target electrical parameter of the camera module 100.

As shown in fig. 2, fig. 2 is a test flowchart of the camera module test apparatus shown in fig. 1. When the camera module testing device works, the bending device 1 bends the flexible circuit board 120 of the camera module 100 for a preset number of times, and then performs an open-short circuit test, a leakage current test, a standby current test, a camera 110 start test, a working current test and a photographing and plotting test on the camera module 100.

In the open short circuit test, the leakage current test, the standby current test and the working current test, the test device 3 can acquire a target electrical parameter of the camera module 100, and then determine the relationship between the target electrical parameter and a preset interval according to the target electrical parameter acquired by the test device 3, if the target electrical parameter is within the preset interval, the test is passed and the next step is carried out according to the flow chart in fig. 2; if the target electrical parameter is outside the preset interval, the test fails, at this time, the bending frequency of the flexible circuit board 120 is recorded, and the test result is updated.

In the test of starting the test and photographing the image of the camera 110, the driving module 21 sends a driving signal for driving the camera 110 to work to the connecting end 121 of the flexible circuit board 120, then the processing module 22 detects whether the connecting end 121 of the flexible circuit board 120 outputs a target image signal, if the connecting end 121 of the flexible circuit board 120 outputs the target image signal, the test passes and enters the next step as shown in the flowchart in fig. 2; if the connection end 121 of the flexible circuit board 120 is not detected to output the target image signal, the test is failed, and the bending times of the flexible circuit board 120 need to be recorded.

Through the above tests, the influence of the bending times of the flexible circuit board 120 on the image output of the camera 110 and the target electrical parameters of the camera module 100 can be studied, and the data of the bending times of the flexible circuit board 120 is obtained when the image output of the camera 110 is abnormal and the target electrical parameters are abnormal, so as to provide a theoretical basis for the design and the assembly of the camera module 100.

In some embodiments, as shown in fig. 1, the processing module 22 includes a data processing unit 221, an algorithm determination unit 222, a second communication module 223, a parameter setting unit 224, and an electrical communication module 225.

The second communication module 223 is configured to be connected with the first communication module for transmitting the target image signal and the target electrical parameter data.

The data processing unit 221 is configured to perform noise reduction processing on the image signal and the target electrical parameter data output from the connection terminal 121.

The algorithm determining unit 222 is configured to determine a relationship between the target electrical parameter and a preset interval according to the target electrical parameter obtained by the testing device 3, and if the target electrical parameter is located in the preset interval, control the camera module testing device to enter the next step as shown in the flowchart in fig. 2; if the target electrical parameter is outside the preset interval, recording the bending times of the flexible circuit board 120;

the algorithm determination unit 222 is further configured to determine whether the connection terminal 121 outputs the target image signal according to the level of the digital signal output by the connection terminal 121; if the connection end 121 of the flexible circuit board 120 is detected to output the target image signal, controlling the camera module testing equipment to enter the next step according to the flow chart in fig. 2; if the connection end 121 of the flexible circuit board 120 is not detected to output the target image signal, the bending times of the flexible circuit board 120 are recorded.

The parameter setting unit 224 is configured to store a preset number of times the flexible circuit board 120 is bent, which is input by a user.

The electrical communication module 225 is configured to signal interface with the electrical control module 11 of the bending apparatus 1.

The first communication module 223 and the second communication module 223 may be USB interfaces, and the electrical communication module 225 may be a control interface, such as an RS232 interface or a USB interface.

Referring to fig. 3, fig. 3 is a schematic diagram illustrating the connection between the testing device 3 and the camera module 100 according to some embodiments of the present disclosure, wherein reference numerals P1 to P20 are a plurality of connection pins of the connection terminal 121, respectively. The test apparatus 3 includes a power supply unit 31, a plurality of test lines 32, a plurality of ground lines 33, and a parameter detection unit 34.

First ends (ends a shown in the figure) of the plurality of test lines 32 are all connected with the power supply unit 31, second ends of the plurality of test lines 32 are configured to be connected with the plurality of connection pins in a one-to-one correspondence manner, and each test line 32 is provided with a first switching device (shown by reference numbers K101, K102, K103 … K120 in the figure); one ends of the plurality of ground lines 33 are all grounded, the other ends of the plurality of ground lines 33 are configured to be connected to the plurality of connection pins in a one-to-one correspondence, and a second switching device (indicated by reference numerals K201, K202, K203 … K220 in the figure) is provided on each ground line 33.

The parameter detection unit 34 is configured to acquire a target electrical parameter of a connection pin electrically conducted with the power supply unit 31; the target electrical parameters include a pin voltage value and a pin current value of the connection pin.

When the open short circuit test is performed, the pin voltage value of each connection pin electrically conducted with the power supply unit 31 needs to be detected, and when the pin voltage value of one of the connection pins is detected, the rest of the connection pins need to be grounded, and the specific detection steps are as follows:

open short test of connection pin P1: as shown in fig. 3, the first switch device K101 is closed to electrically connect the connection pin P1 with the power supply unit 31, and the remaining first switch devices K102 to K120 are opened; the second switching device K201 is turned off, and the remaining second switching devices K202 to K220 are all turned on to ground the connection pins P2 to P20, and at this time, the parameter detection unit 34 obtains the pin voltage value of the connection pin P1.

The open/short test for the remaining connection pins P2-P20 can refer to the step of the open/short test for the connection pin P1, and is not described in detail herein.

If the pin voltage value of each connecting pin is within a first preset interval, the open-short circuit test is passed; if the pin voltage value of one connection pin is outside the first preset interval, the connection pin open/short circuit test does not pass, and the bending times of the flexible circuit board 120 need to be recorded. The foregoing preset interval includes a first preset interval.

When a leakage current test is carried out, the pin current value of each connecting pin needs to be detected, when the pin current value of one connecting pin is detected, the rest connecting pins need to be grounded, and the specific detection steps are as follows:

leakage current test of connection pin P1: as shown in fig. 3, the first switch device K101 is closed to electrically connect the connection pin P1 with the power supply unit 31, and the remaining first switch devices K102 to K120 are opened; the second switching device K201 is turned off, and the remaining second switching devices K202 to K220 are all turned on to ground the connection pins P2 to P20, and at this time, the parameter detection unit 34 obtains the pin current value of the connection pin P1.

The leakage current test of the remaining connection pins P2-P20 may refer to the leakage current test of the connection pin P1, and is not described in detail herein.

If the pin current value of each connecting pin is within a second preset interval, the leakage current test is passed; if the pin current value of one connection pin is outside the second preset interval, the connection pin leakage current test does not pass, and the bending times of the flexible circuit board 120 need to be recorded at this time. The foregoing preset interval includes a second preset interval.

After the flexible circuit board 120 is bent for a plurality of times, if the circuit is damaged, the pin voltage value and the pin current value are abnormal, and therefore, by determining whether the pin voltage value and the pin current value fall into the preset interval, it can be accurately determined whether the circuit of the flexible circuit board of the camera module 100 is damaged after the flexible circuit board is bent for the preset number of times.

The first switching device and the second switching device may be mechanical switches, or may be switching elements, such as a transistor, a field effect transistor, and the like, which are not limited herein.

In some embodiments, as shown in fig. 3, the power supply unit 31 includes a constant current source 311 and a constant voltage source 312, the constant current source 311 is connected to the first ends of the plurality of test lines 32 through a first connection line 35, and a third switching device K300 is provided on the first connection line 35; the constant voltage source 312 is connected to the first ends of the plurality of test lines 32 through a second connection line 36, and a fourth switching device K400 is disposed on the second connection line 36.

In order to facilitate the connection between the first connection lines 35 and the second connection lines 36 and the first ends of the plurality of test lines 32, as shown in fig. 3, the first ends of the plurality of test lines 32 are connected together through an intermediate line 38, and both the first connection lines 35 and the second connection lines 36 are connected to the intermediate line 38.

The parameter detection unit 34 includes a voltage detection unit 341 and a first current detection unit 342, the voltage detection unit 341 is configured to obtain a pin voltage value of a connection pin electrically conducted with the constant current source 311; the first current detection unit 342 is configured to obtain a pin current value of a connection pin electrically conducted with the constant voltage source 312.

Illustratively, the voltage detection unit 341 is a voltmeter, and the first current detection unit 342 is an ammeter.

When the open-short circuit test is performed, the third switching device K300 is closed, the fourth switching device K400 is opened, and at this time, the constant current source 311 is electrically connected to the first ends of the plurality of test lines 32, and the constant current source 311 and each connection pin can be electrically conducted through the closing or opening of the first switching device on the test line 32 and the closing or opening of the second switching device on the ground line 33, so as to perform the open-short circuit test.

For example, the constant current source 311 is a constant current source with an output current of 500uA, and the first predetermined interval is [0.2V,1.2V ].

When the leakage current test is performed, the third switching device K300 is turned off, the fourth switching device K400 is turned on, and at this time, the constant voltage source 312 is electrically connected to the first ends of the plurality of test lines 32, and the constant voltage source 312 and each connection pin can be electrically connected to perform the leakage current test by turning on or off the first switching device on the test line 32 and turning on or off the second switching device on the ground line 33.

For example, the constant voltage source 312 is a constant voltage source with an output voltage of 1V, and the second predetermined interval is [0 μ a,100 μ a ].

In this embodiment, the power supply unit 31 includes the constant current source 311 and the constant voltage source 312, so that the detection device 2 can perform two tests of open/short circuit and leakage current on the camera module 100, and the influence of the bending times of the flexible circuit board 120 on the target electrical parameter can be studied more accurately.

The third switching device K300 and the fourth switching device K400 may be mechanical switches, or may be switching elements, such as a triode, a field effect transistor, and the like, and are not limited specifically herein.

In some embodiments, as shown in fig. 3, the voltage detecting unit 341 includes two voltage detecting terminals, one voltage detecting terminal m1 is connected to the first connection line 35, and the other voltage detecting terminal m2 is grounded.

In this embodiment, through the switching of the switch device, the voltage detection unit 341 can obtain the pin voltage value of each connection pin by obtaining the voltage-to-ground voltage of the first connection line 35, so that it is not necessary to correspondingly set one voltage detection unit 341 on each test line 32, and the number of the voltage detection units 341 is greatly reduced, thereby being beneficial to reducing the space occupied by the detection apparatus 2.

In some embodiments, as shown in fig. 3, the first current detecting unit 342 is disposed on the second connection line 36.

In this embodiment, through the switching of the switching device, the first current detecting unit 342 can obtain the pin current value of each connection pin by obtaining the current value of the second connection line 36, so that it is not necessary to correspondingly set one first current detecting unit 342 on each test line 32, the number of the first current detecting units 342 is greatly reduced, and the space occupied by the detecting device 2 is favorably reduced.

Of course, the power supply unit 31 may also include one of the constant current source 311 and the constant voltage source 312 according to actual needs, so that the detection device 2 can perform one of the short circuit and the leakage current test on the camera module 100. Specifically, the power supply unit 31 includes a constant current source 311, the constant current source 311 is electrically connected to the first ends of the plurality of test lines 32 through a first connection line 35, at this time, the parameter detection unit 34 includes a voltage detection unit 341, and the voltage detection unit 341 is configured to obtain a pin voltage value of a connection pin electrically conducted with the constant current source 311; alternatively, the power supply unit 31 includes a constant voltage source 312, and the constant voltage source 312 is electrically connected to the first ends of the plurality of test lines 32 through the second connection line 36, at this time, the parameter detection unit 34 includes a first current detection unit 342, and the first current detection unit 342 is configured to obtain a pin current value of a connection pin electrically conducted with the constant voltage source 312.

As shown in fig. 4 and 5, fig. 4 is a schematic diagram of a connection between a driving module 21 and a camera module 100 according to some embodiments of the present disclosure, and fig. 5 is a schematic diagram of a connection between a driving module 21 and a camera module 100 according to other embodiments of the present disclosure. Reference number P in the figure_I1～P_I3Three input pins of the connection end 121 of the flexible circuit board 120 are shown, and the figure is illustrated by taking three input pins as an example; reference number P in the figure_O1～P_OnA plurality of output pins of the connection terminals 121 of the flexible circuit board 120 are shown.

The driving module 21 is configured to be connected to the plurality of input pins in a one-to-one correspondence via a plurality of third connection lines 23. The test apparatus 3 includes a second current detection unit 37, and the second current detection unit 37 is configured to acquire an input current value input to the input pin by the drive module 21. Wherein the target electrical parameter comprises an input current value.

Illustratively, the second current detection unit 37 is an ammeter.

Standby current test of the camera module 100: when the camera 110 is in a standby state, the second current detection unit 37 may obtain an input current value input to each input pin by the driving module 21, and if the input current value of each input pin is within a third preset interval, the standby current test is passed; if the input current value of one input pin is located outside the third preset interval, the standby current test of the input pin does not pass, and the bending times of the flexible circuit board 120 need to be recorded at this time.

The working current of the camera module 100 is tested: when the camera 110 is in a shooting state, the second current detection unit 37 may obtain an input current value input to each input pin by the driving module 21, and if the input current value of each input pin is located in a fourth preset interval, the working current test is passed; if the input current value of one input pin is located outside the fourth preset interval, the working current test of the input pin does not pass, and the bending times of the flexible circuit board 120 need to be recorded. The foregoing preset intervals include a third preset interval and a fourth preset interval.

Illustratively, the third predetermined interval is (0mA,1 mA)]The fourth preset interval is (0mA, NmA)]And the value of N is between 20mA and 50 mA. Input pin P of flexible circuit board 120_I1～P_I3Respectively, an AVDD (analog circuit power supply) pin, a DVDD (digital circuit power supply) pin, and an IOVDD pin.

After the flexible circuit board 120 is bent for several times, if the circuit is damaged, the input current value of the input pin is abnormal, and therefore, by determining whether the input current value falls into the preset interval, it can be accurately determined whether the circuit of the flexible circuit board of the camera module 100 is damaged after the flexible circuit board is bent for the preset times.

The relationship between the second current detecting unit 37 and the third connecting line 23 is not exclusive, and in some embodiments, as shown in fig. 4, a second current detecting unit 37 is disposed on each third connecting line 23. In this embodiment, the second current detecting unit 37 can directly obtain the input current value of the input pin by obtaining the current value on the third connection line 23, so that the manner of obtaining the input current value by the second current detecting unit 37 is relatively simple.

In other embodiments, as shown in fig. 5, a fifth switching device (denoted by reference numbers K501, K502, and K503) is disposed on each third connection line 23.

The second current detecting unit 37 includes two current detecting terminals, one current detecting terminal n1 is connected to the plurality of third connecting lines 23 through a plurality of fourth connecting lines 391 in a one-to-one correspondence manner, and a connection point of the fourth connecting line 391 and the third connecting line 23 is located between the driving module 21 and the fifth switching device; the other current detecting terminal n2 is configured to be connected to the plurality of input pins in a one-to-one correspondence via a plurality of fifth connection lines 392.

A sixth switching device is disposed on each of the fourth connection line 391 and each of the fifth connection lines 392. As shown in fig. 5, the sixth switching devices located on the fourth connection line 391 are labeled K611, K621, and K631, respectively; the sixth switching devices located on the fifth connection line 392 are respectively denoted by K612, K622, and K632.

At the detection input pin P_I1When the current value is input, the fifth switching device K501 is turned off, the remaining fifth switching devices K502 and K503 are turned on, the sixth switching devices K611 and K612 are turned on, and the remaining sixth switching devices K621, K622, K631 and K632 are turned off, so that the second current detection unit 37 can obtain the input pin P_I1The input current value of (1).

The rest of the input pins P_I2、P_I3The input current value of (2) is detected by referring to the input pin P_I1The current value detection method is not described in detail herein.

In this embodiment, by turning on and off the fifth switching device and the sixth switching device, the input current value of each input pin can be obtained by only one second current detection unit 37, so that the number of the second current detection units 37 is greatly reduced, and the occupied space of the detection apparatus 2 is reduced.

The fifth switching device and the sixth switching device may be mechanical switches, or may be switching elements, such as a triode, a field effect transistor, and the like, and are not limited specifically herein.

As shown in fig. 6, fig. 6 is a flowchart of the steps performed by the processing module 22 in fig. 1. The processing module 22 is configured to perform the following steps:

and N100, controlling the bending device 1 to bend the flexible circuit board 120 for a preset number of times. The preset number of times may be one time, or two or more times, and may be determined according to actual conditions.

N210, determining the relation between the first target electrical parameter and a first preset interval according to the first target electrical parameter obtained by the testing device 3; the first target electrical parameter is a pin voltage value of a connection pin electrically connected with the power supply unit 31 in the flexible circuit board 120 during the open-short circuit test.

If the first target electrical parameter is outside the first preset interval, executing step N300, and recording the number of times that the flexible circuit board 120 is bent by the bending device 1;

if the first target electrical parameter is within the first predetermined interval, go to step N220.

N220, determining the relation between the second target electrical parameter and a second preset interval according to the second target electrical parameter obtained by the testing device 3; the second target electrical parameter is a pin current value of a connection pin electrically connected to the power supply unit 31 in the flexible circuit board 120 during the leakage current test.

If the second target electrical parameter is outside the second preset interval, executing step N300, and recording the number of times that the flexible circuit board 120 is bent by the bending device 1;

if the second target electrical parameter is within the second predetermined interval, go to step N230.

N230, determining the relation between the third target electrical parameter and a third preset interval according to the third target electrical parameter obtained by the testing device 3; the third target electrical parameter is an input current value input to the input pin by the driving module 21 when the camera 110 is in the standby state.

If the third target electrical parameter is outside the third preset interval, executing step N300, and recording the number of times that the flexible circuit board 120 is bent by the bending device 1;

if the third target electrical parameter is within the third predetermined interval, go to step N240.

N240, after the driving module 21 sends a starting signal for starting the camera 110 to enter a shooting state to the connecting end 121, detecting whether the connecting end 121 outputs a video signal; wherein the video signal comprises a number of frames of image signals.

If the video signal output by the connecting end 121 is not detected, executing step N300, and recording the number of times of bending the flexible circuit board 120 by the bending device 1;

if the video signal output from the connection terminal 121 is detected, step N250 is executed.

This step is performed by the camera 110 initiating the test.

N250, determining the relation between the fourth target electrical parameter and a fourth preset interval according to the fourth target electrical parameter obtained by the testing device 3; the fourth target electrical parameter is an input current value input to the input pin by the driving module 21 when the camera 110 is in a shooting state.

If the fourth target electrical parameter is outside the fourth preset interval, executing step N300, and recording the number of times that the flexible circuit board 120 is bent by the bending device 1;

if the fourth target electrical parameter is within the fourth predetermined interval, go to step N260.

N260, after the driving module 21 sends a photographing signal for photographing the camera 110 to the connection terminal 121, detecting whether the connection terminal 121 outputs one or more frames of image signals;

if the connection end 121 does not output one or more frames of image signals, executing step N300, and recording the number of times of bending the flexible circuit board 120 by the bending device 1;

if the connection end 121 is detected to output one or more frames of image signals, N100 to N260 are executed in a loop until the target electrical parameter is outside the preset interval, or the connection end 121 is not detected to output the target image signal. Wherein the target image signal includes the video signal.

This step is performed by a photographical chart test. The photographing signal includes a single photographing signal and a continuous photographing signal, the single photographing signal enables the camera 110 to capture and output one frame of image signal in the video signal, and the continuous photographing signal enables the camera 110 to capture and output multiple frames of image signals in the video signal.

The processing module 22 not only has a function of detecting image signals, but also has a function of judging whether the target electrical parameters meet the requirements, and controls the bending device 1 to bend the flexible circuit board 120 according to whether the target image signals are detected and whether the target electrical parameters meet the requirements, so that the automation level of the camera module testing equipment is improved, and the labor intensity of an operator is reduced.

Of course, the open-short circuit test, the leakage current test, the standby current test, the camera 110 start test, the working current test, and the photographing plotting test in fig. 2 are not limited to the test according to the sequence in the flowchart in fig. 2, and may be performed according to a reasonable sequence according to actual requirements. Correspondingly, steps N210 to N260 in fig. 6 are not limited to be executed in the order in fig. 6, and may also be executed in other orders according to actual needs, and are not specifically limited herein.

As shown in fig. 7, fig. 7 is a schematic block diagram of a camera module testing apparatus according to another embodiment of the present application. The main differences between the camera module testing apparatus in fig. 7 and the camera module testing apparatus in fig. 1 are that: the camera module test apparatus in fig. 7 is not provided with the test device 3. The camera module test equipment can perform camera 110 starting test and photographing mapping test on the camera module 100.

As shown in fig. 8, fig. 8 is a test flow chart of the camera module testing apparatus in fig. 7. When the camera module testing apparatus works, the bending device 1 bends the flexible circuit board 120 of the camera module 100 for a preset number of times, and then performs a camera 110 start test and a photographing and plotting test on the camera module 100.

As shown in fig. 9, fig. 9 is a flowchart of the steps performed by the processing module 22 in fig. 7. The processing module 22 is configured to perform the following steps:

and N100, controlling the bending device 1 to bend the flexible circuit board 120 for a preset number of times.

N240, after the driving module 21 sends a starting signal for starting the camera 110 to enter a shooting state to the connecting end 121, detecting whether the connecting end 121 outputs a video signal;

if the video signal output from the connection terminal 121 is detected, step N260 is executed.

This step is performed by the camera 110 initiating the test.

if the connection end 121 is detected to output one or more frames of image signals, N100, N240, and N260 are executed in a loop until the target electrical parameter is outside the preset interval, or the connection end 121 is not detected to output the target image signal.

This step is performed by a photographical chart test.

The processing module 22 can control the bending device 1 to bend the flexible circuit board 120 according to whether a target image signal is detected, so that the automation level of the camera module testing equipment is improved, and the labor intensity of an operator is reduced.

As shown in fig. 10, fig. 10 is a schematic block diagram of a camera module testing apparatus according to another embodiment of the present application. The main differences between the camera module testing apparatus in fig. 10 and the camera module testing apparatus in fig. 1 are that: the camera module testing apparatus in fig. 10 is not provided with the driving module 21. The camera module testing equipment can perform open-short circuit testing and leakage current testing on the camera module 100.

As shown in fig. 11, fig. 11 is a test flowchart of the camera module testing apparatus in fig. 10. When the camera module testing apparatus operates, the bending device 1 bends the flexible circuit board 120 of the camera module 100 for a preset number of times, and then performs an open/short circuit test and a leakage current test on the camera module 100.

As shown in fig. 12, fig. 12 is a flowchart of the steps performed by the processing module 22 in fig. 10. The processing module 22 is configured to perform the following steps:

N210, determining the relation between the first target electrical parameter and a first preset interval according to the first target electrical parameter obtained by the testing device 3;

This step is performed by an open short test.

N220, determining the relation between the second target electrical parameter and a second preset interval according to the second target electrical parameter obtained by the testing device 3;

if the second target electrical parameter is located in the second preset interval, executing N100, N210, and N220 in a loop until the target electrical parameter is located outside the preset interval, or the connection end 121 is not detected to output the target image signal.

This step is performed for a leakage current test.

The processing module 22 can control the bending device 1 to bend the flexible circuit board 120 according to whether the target electrical parameter meets the requirement, so that the automation level of the camera module testing equipment is improved, and the labor intensity of an operator is reduced.

Of course, the camera module testing apparatus in fig. 10 may not be provided with the processing module 22, and the user may manually determine the relationship between the target electrical parameter and the preset interval according to the target electrical parameter obtained by the testing device 3, and if the target electrical parameter is outside the preset interval, manually record the number of times that the bending device 1 bends the flexible circuit board 120. The open short circuit test and the leakage current test are not limited to the test in the order in the flowchart in fig. 2, and the leakage current test may be performed first and then the open short circuit test may be performed. Accordingly, steps N210 and N220 in fig. 12 are not limited to be executed in the order shown in fig. 6, and N220 may be executed first and then N210 may be executed.

In the step N300, in addition to automatically recording the number of times that the bending device 1 bends the flexible circuit board 120, the processing module 22 may also send an alarm signal, and after receiving the alarm signal, the user manually records the number of times that the bending device 1 bends the flexible circuit board 120. Of course, the processing module 22 may also send out an alarm signal and record the number of times the bending device 1 bends the flexible circuit board 120.

As can be seen from the embodiments shown in fig. 6 to 12: the processing module 22 in the embodiment of the present application is configured to detect whether the connection terminal 121 outputs the target image signal after the driving module 21 sends the driving signal for driving the camera 110 to operate to the connection terminal 121; if the target image signal output by the connecting end 121 is not detected, the number of times of bending the flexible circuit board 120 by the bending device 1 is recorded and/or an alarm signal is sent out.

In the embodiment of the present application, the processing module 22 is configured to determine a relationship between the target electrical parameter and the preset interval according to the target electrical parameter obtained by the testing device 3; if the target electrical parameter is outside the preset interval, recording the times of bending the flexible circuit board 120 by the bending device 1 and/or sending out an alarm signal.

The processing module 22 in the embodiment of the present application is configured to perform the following steps:

n100, controlling the bending device 1 to bend the flexible circuit board 120 for a preset number of times;

n200, determining the relation between the target electrical parameter and a preset interval according to the target electrical parameter acquired by the testing device 3; and after the driving module 21 sends a driving signal for driving the camera 110 to operate to the connection terminal 121, detecting whether the connection terminal 121 outputs a target image signal;

if the target electrical parameter is outside the preset interval or the target image signal output by the connecting end 121 is not detected, recording the times of bending the flexible circuit board 120 by the bending device 1 and/or sending an alarm signal;

if the target electrical parameter is within the preset interval and the connection end 121 is detected to output the target image signal, the steps N100 to N200 are executed in a loop until the target electrical parameter is outside the preset interval or the connection end 121 is not detected to output the target image signal.

An embodiment of the present application further provides a method for testing a camera module, as shown in fig. 13, fig. 13 is a flowchart of a method for testing a camera module in some embodiments of the present application. The test method of the camera module comprises the following steps:

and S100, bending the flexible circuit board 120 for preset times. The preset number of times may be one time, or two or more times, and may be determined according to actual conditions.

S211, acquiring a first target electrical parameter of the camera module 100; the first target electrical parameter is a pin voltage value of a connection pin electrically connected with the power supply unit 31 in the flexible circuit board 120 during the open-short circuit test.

S212, determining the relation between the first target electrical parameter and a first preset interval according to the acquired first target electrical parameter;

if the first target electrical parameter is outside the first preset interval, executing step S300, and recording the bending times of the flexible circuit board 120;

if the first target electrical parameter is within the first predetermined interval, step S221 is executed.

S221, acquiring a second target electrical parameter of the camera module 100; the second target electrical parameter is a pin current value of a connection pin electrically connected to the power supply unit 31 in the flexible circuit board 120 during the leakage current test.

S222, determining the relation between the second target electrical parameter and a second preset interval according to the obtained second target electrical parameter;

if the second target electrical parameter is outside the second preset interval, executing step S300, and recording the bending times of the flexible circuit board 120;

if the second target electrical parameter is within the second predetermined interval, step S231 is executed.

S231, acquiring a third target electrical parameter of the camera module 100; the third target electrical parameter is an input current value input to the input pin by the driving module 21 when the camera 110 is in the standby state.

S232, determining the relation between the third target electrical parameter and a third preset interval according to the obtained third target electrical parameter;

if the third target electrical parameter is outside the third preset interval, executing step S300, and recording the bending times of the flexible circuit board 120;

if the third target electrical parameter is within the third predetermined interval, step S241 is executed.

S241, sending a start signal for starting the camera 110 to enter a shooting state to the connection end 121;

s242, detecting whether the connecting end 121 outputs a video signal;

if the video signal output by the connecting end 121 is not detected, executing step S300, and recording the bending times of the flexible circuit board 120;

if the video signal output from the connection terminal 121 is detected, step S251 is executed.

S251, acquiring a fourth target electrical parameter of the camera module 100; the fourth target electrical parameter is an input current value input to the input pin by the driving module 21 when the camera 110 is in a shooting state.

S252, determining the relationship between the fourth target electrical parameter and a fourth preset interval according to the obtained fourth target electrical parameter;

if the fourth target electrical parameter is outside the fourth preset interval, executing step S300, and recording the bending times of the flexible circuit board 120;

if the fourth target electrical parameter is within the fourth predetermined interval, step S261 is executed.

S261, sending a photographing signal for photographing the camera 110 to the connection terminal 121;

s262, detecting whether the connecting end 121 outputs one or more frames of image signals;

if the connection end 121 is not detected to output one or more frames of image signals, executing step S300, and recording the bending times of the flexible circuit board 120;

if it is detected that the connection terminal 121 outputs one or more frames of image signals, S100 to S262 are cyclically executed until the target electrical parameter is outside the preset interval, or the connection terminal 121 is not detected to output the target image signal. Wherein the target image signal comprises a video signal.

The steps S211 to S262 are not limited to be executed in the order shown in fig. 13, and may also be executed in other orders according to actual needs, and are not limited specifically herein.

As shown in fig. 14, fig. 14 is a flowchart of a testing method of a camera module according to another embodiment of the present application. The test method of the camera module comprises the following steps:

and S100, bending the flexible circuit board 120 for preset times.

s242, detecting whether the connecting end 121 outputs a video signal;

if the video signal output from the connection terminal 121 is detected, step S261 is executed.

if it is detected that the connection terminal 121 outputs one or more frames of image signals, S100, S241, S242, S261, and S262 are cyclically executed until the target electrical parameter is outside the preset interval, or it is not detected that the connection terminal 121 outputs the target image signal.

As shown in fig. 15, fig. 15 is a flowchart of a method for testing a camera module according to another embodiment of the present application. The test method of the camera module comprises the following steps:

and S100, bending the flexible circuit board 120 for preset times.

S211, acquiring a first target electrical parameter of the camera module 100; the first target electrical parameter is a voltage value of a connection pin of the flexible circuit board 120 in the open-short test.

S221, acquiring a second target electrical parameter of the camera module 100; the second target electrical parameter is a current value of the connection pin of the flexible circuit board 120 in the leakage current test.

if the second target electrical parameter is within the second preset interval, S100, S211, S212, S221, and S222 are executed in a loop until the target electrical parameter is outside the preset interval, or the connection end 121 is not detected to output the target image signal.

In the step S300, in addition to recording the bending times of the flexible circuit board 120, an alarm signal may also be sent out, and after receiving the alarm signal, the user records the bending times of the flexible circuit board 120 by the bending apparatus 1 manually. Of course, it is also possible to both send out the alarm signal and record the number of times the flexible circuit board 120 is bent.

Of course, the steps S211 to S222 are not limited to be executed in the order shown in fig. 15, and may also be executed in other sequences according to actual needs, for example, the steps S221 and S222 are executed first, and then the steps S211 and S212 are executed.

As can be seen from the embodiments shown in fig. 13 to 15: the embodiment of the application provides a method for testing a camera module, which comprises the following steps: bending the flexible circuit board 120 for a preset number of times and sending a driving signal for driving the camera 110 to work to the connection end 121; then, whether the connection terminal 121 outputs the target image signal is detected; if the target image signal output by the connecting end 121 is not detected, the bending times of the flexible circuit board 120 are recorded and/or an alarm signal is sent out.

The embodiment of the application provides a method for testing a camera module, which comprises the following steps: bending the flexible circuit board 120 for a preset number of times; then, acquiring target electrical parameters of the camera module 100; and determining the relation between the target electrical parameter and the preset interval according to the acquired target electrical parameter, and recording the bending times of the flexible circuit board 120 and/or sending an alarm signal if the target electrical parameter is outside the preset interval.

The embodiment of the application provides a method for testing a camera module, which comprises the following steps: s100, bending the flexible circuit board 120 for preset times;

s200, acquiring a target electrical parameter of the camera module 100, and determining the relation between the target electrical parameter and a preset interval according to the acquired target electrical parameter; and detects whether the connection terminal 121 outputs a target image signal after inputting a driving signal for driving the camera 110 to operate to the connection terminal 121;

if the target electrical parameter is outside the preset interval or the target image signal output by the connecting end 121 is not detected, recording the bending times of the flexible circuit board 120 and/or sending an alarm signal;

if the target electrical parameter is within the preset interval or the connection end 121 is detected to output the target image signal, the steps S100 to S200 are executed in a loop until the target electrical parameter is outside the preset interval or the connection end 121 is not detected to output the target image signal.

The same or similar features in the embodiment of the method for testing a camera module as in the embodiment of the product of the camera module testing device may be referred to the description of the embodiment of the product of the camera module testing device, and are not described herein again.

The specific structure of the bending apparatus 1 in the embodiment of the present application is described below:

as shown in fig. 16 and 17, fig. 16 is a schematic structural diagram of a camera module testing apparatus in some embodiments of the present application, and fig. 17 is an exploded view of the camera module testing apparatus of fig. 16. The bending device 1 includes an electrical control module 11, a mechanism housing 13 disposed above the electrical control module 11, and a bending mechanism 12 disposed in the mechanism housing 13.

The electrical control module 11 includes a module housing 111, a control button 112 and a display screen 113 are disposed on the module housing 111, the control button 112 can perform start-stop control on the bending mechanism 12, and specifically, the control button 112 includes a start button, a stop button and an emergency stop button. The display 113 is used to display parameter information such as the number of times of bending the flexible circuit board 120.

The mechanism housing 13 is used for protecting the bending mechanism 12, and prevents external impurities such as dust from entering the bending mechanism 12 and affecting the normal operation of the bending mechanism 12.

Of course, the electrical control module 11 and the bending mechanism 12 are not limited to be arranged vertically, and may be arranged side by side along the horizontal direction, and are not limited herein.

As shown in fig. 18, 19 and 20, fig. 18 is a schematic structural view of a bending mechanism 12 in some embodiments of the present application from one viewing angle, fig. 19 is a schematic structural view of a bending mechanism 12 in other embodiments of the present application from another viewing angle, and fig. 20 is a schematic structural view of a camera mounting table 15 and a circuit board mounting table 16 in fig. 18.

The bending mechanism 12 includes a mounting frame 14, a camera placing stage 15, a circuit board placing stage 16, and a bending drive device 17.

The camera placing table 15 is provided with a camera placing portion 151 for placing the camera 110, the circuit board placing table 16 is relatively fixed in position with the mounting frame 14, and the circuit board placing table 16 is provided with a circuit board placing portion 161 for placing the connecting terminal 121. The bending drive device 17 is configured to drive the camera placing stage 15 to move relative to the circuit board placing stage 16 to bend and flatten the flexible circuit board 120.

Through placing the circuit board the position relatively fixed of platform 16 and mounting bracket 14, just so can avoid the link 121 motion of flexible circuit board 120 at flexible circuit board 120 buckle with the flat in-process of exhibition to guarantee drive module 21, the stability of being connected of detection device 2 and flexible circuit board 120's link 121, and then guarantee detection device 2, the stability of signal transmission between test set 3 and flexible circuit board 120's link 121, with guarantee that detection device 2, the test set 3 detected the result more accurate.

In some embodiments, as shown in fig. 20, 21 and 22, fig. 21 is an exploded view of the camera placing table 15 in fig. 20, and fig. 22 is a schematic structural view of the limiting member 18 in fig. 21. The camera placing part 151 is a placing cavity, and an avoiding opening 1511 for the flexible circuit board 120 to extend out and a camera hole 1512 opposite to the lens of the camera 110 are formed on the wall of the placing cavity.

Through placing camera portion 151 for placing the chamber, it can carry out spacing better to place the chamber like this to camera 110 to can reduce flexible circuit board 120 and buckle the in-process and rock. By arranging the avoiding port 1511, the flexible circuit board 120 can be smoothly led out from the placing cavity; through setting up the hole 1512 of making a video recording, like this during external light can enter into camera 110 through hole 1512 of making a video recording to guarantee that camera 110 can normally make a video recording, shoot, in order to conveniently carry out camera 110 and start the test and shoot the test of drawing.

In some embodiments, as shown in fig. 21 and 22, a placing groove 1513 is formed on the camera placing table 15, the bending mechanism 12 further includes a limiting member 18, and the limiting member 18 is detachably connected to the camera placing table 15, so that the limiting member 18 and the placing groove 1513 form a placing cavity. The camera hole 1512 is located at a position where the stopper 18 corresponds to the notch of the placement groove 1513.

When the camera 110 is placed, the camera 110 is placed in the placing groove 1513 to position the camera 110, and then the limiting member 18 is detachably connected with the camera placing table 15 to place the camera 110 in the placing cavity; when the test is finished and the camera 110 needs to be detached, the limiting member 18 is detached from the camera placing table 15, and then the camera 110 is moved out of the placing groove 1513, so that the camera 110 is detached from the camera placing table 15.

The limiting piece 18 is detachably connected with the camera placing table 15, and the limiting piece 18 and the placing groove 1513 form a placing cavity, so that the camera 110 can be conveniently placed in the placing cavity.

In some embodiments, as shown in fig. 22, the position-limiting member 18 has a receiving groove 181, and the receiving groove 181 and the placing groove 1513 form a placing cavity. Through setting up like this, camera 110 just can partly stretch into standing groove 1513, and another part stretches into holding tank 181, and the degree of depth of standing groove 1513 just need not to set up too big like this, and the thickness that camera placed platform 15 just can be designed thinner so to camera placed platform 15's occupation space has been reduced.

As shown in fig. 21 and 22, the limiting member 18 and the camera placing stage 15 can be detachably connected by a fastener (such as a screw), specifically, the limiting member 18 is provided with a first connecting hole 182, the camera placing stage 15 is provided with a second connecting hole 152, and the first connecting hole 182 is connected with the second connecting hole 152 by the fastener.

One pair of the first connection holes 182 and the second connection holes 152 may be provided, or a plurality of pairs of the first connection holes and the second connection holes may be provided correspondingly, which is not specifically limited herein.

Certainly, the limiting member 18 and the camera placing table 15 are not limited to the above detachable connection manner, and the limiting member 18 and the camera placing table 15 can also be detachably connected through clamping, inserting, bonding and other manners.

As shown in fig. 22, the stopper 18 is a block structure, but the stopper 18 is not limited thereto, and may be a plate structure or a column structure, which may be more practical.

In some embodiments, as shown in fig. 23, 24 and 25, fig. 23 is a schematic structural view of the circuit board placing table 16 in fig. 20 in fig. 21, fig. 24 is a partially enlarged view of fig. 23, and fig. 25 is a schematic structural view of the crimping member 163 in fig. 23. The circuit board placement section 161 includes a positioning groove 162 and a press-fit member 163, and the positioning groove 162 is opened on the circuit board placement stage 16; the press-fit member 163 is detachably attached to the circuit board placing table 16 for press-fitting the connection terminals 121 in the positioning grooves 162.

When the connection end 121 of the flexible circuit board 120 needs to be fixed, the connection end 121 of the flexible circuit board 120 is placed in the positioning groove 162, so that the connection end 121 of the flexible circuit board 120 is positioned, and then the crimping member 163 is detachably connected to the circuit board placing table 16, so that the connection end 121 of the flexible circuit board 120 is fixed. When the connection end 121 of the flexible circuit board 120 is to be removed after the test is completed, the press-fit member 163 is removed from the circuit board placing table 16, and then the connection end 121 of the flexible circuit board 120 is removed from the positioning groove 162, so that the connection end 121 of the flexible circuit board 120 is removed from the circuit board placing table 16.

By providing the positioning groove 162, it is possible to ensure that the connection terminal 121 of the flexible circuit board 120 is placed at a predetermined position of the circuit board placing table 16. Through setting up crimping piece 163 and crimping piece 163 with the link 121 crimping in constant head tank 162, can make the link 121 of flexible circuit board 120 fix more firmly on circuit board places the platform 16 like this to avoid the link 121 of flexible circuit board 120 to take place to rock at the in-process that flexible circuit board 120 buckled.

As shown in fig. 24 and 25, the press-contact member 163 and the circuit board placing table 16 can be detachably connected by a fastening member (such as a screw), specifically, a third connecting hole 1631 is formed on the press-contact member 163, a fourth connecting hole 164 is formed on the circuit board placing table 16, and the third connecting hole 1631 is connected with the fourth connecting hole 164 by a fastening member.

One pair of the third connecting holes 1631 and the fourth connecting holes 164 may be provided, or multiple pairs of the third connecting holes 1631 and the fourth connecting holes 164 may be provided correspondingly, which is not limited specifically herein.

Of course, the connection between the press-connection member 163 and the circuit board placement stage 16 is not limited to the above-mentioned detachable connection, and the press-connection member 163 and the circuit board placement stage 16 may also be detachably connected by means of clamping, plugging, bonding, and the like.

As shown in fig. 22, the crimping member 163 has a block structure, but the present invention is not limited thereto, and the crimping member 163 may have a plate structure or a column structure, which may be more practical.

In some embodiments, as shown in fig. 20, a plurality of camera placing portions 151 are arranged side by side on the camera placing stage 15, and a plurality of circuit board placing portions 161 are correspondingly arranged on the circuit board placing stage 16 along the arrangement direction X of the plurality of camera placing portions 151. Therefore, the flexible circuit board 120 of the plurality of camera modules 100 can be bent simultaneously in the test process by the camera placing table 15 and the circuit board placing table 16, and the camera module test equipment can test the plurality of camera modules 100 simultaneously, so that the test efficiency of the camera module test equipment is improved.

In some embodiments, as shown in fig. 18 and 19, the bending device 1 includes a plurality of pairs of camera placement tables 15 and circuit board placement tables 16 (three pairs are shown in the drawings), and the bending driving device 17 is configured to drive the camera placement tables 15 in each pair to move synchronously with respect to the circuit board placement tables 16 so as to bend and flatten the corresponding flexible circuit board 120. Through setting up like this, camera module test equipment just can test more camera modules 100 simultaneously to this camera module test equipment's efficiency of software testing has further been improved.

In some embodiments, as shown in fig. 18 and 19, the bending driving device 17 includes a plurality of driving shafts 172 and a driving motor 171, wherein the plurality of driving shafts 172 are rotatably disposed on the mounting frame 14 and are connected with the plurality of camera placement tables 15 in a one-to-one correspondence; the driving motor 171 is disposed on the mounting frame 14, and can drive the driving shafts 172 to rotate synchronously through the transmission mechanism 173, so as to drive each of the camera placing tables 15 to turn over relative to the corresponding circuit board placing table 16, and bend the flexible circuit board 120 disposed on the camera placing table 15.

The mode that drives the upset of platform 15 is placed to the camera through drive shaft 172 rotates buckles the flexible circuit board 120 that corresponds, can make the shared space of motion trail that the platform 15 was placed to the camera littleer like this, can make like this that mechanism 12 is buckled compacter, and this camera 110 test equipment just can set up more cameras of right and place platform 15 and circuit board and place platform 16, improves this camera module test equipment's efficiency of software testing.

In some embodiments, as shown in fig. 18 and 19, the drive mechanism 173 is a synchronous belt drive mechanism. Because synchronous belt drive has the advantage that does not have the slip, has accurate drive ratio, can make driving motor 171 can the accurate drive a plurality of cameras place platform 15 and overturn the same angle like this to guarantee the synchronous bending and the expansion of a plurality of flexible circuit board 120. In addition, the synchronous belt transmission mechanism can flexibly adjust the center distance of the synchronous belt wheel, so that the adaptability of the synchronous belt transmission mechanism is stronger.

The synchronous belt transmission mechanism includes a first synchronous pulley 174 respectively sleeved on two adjacent driving shafts 172, a synchronous belt 175 connected to the two adjacent first synchronous pulleys 174, and a second synchronous pulley 176 sleeved on an output shaft of the driving motor 171, and the second synchronous pulley 176 is engaged with one of the synchronous belts 175.

For example, as shown in fig. 19, a first timing pulley 174 is respectively sleeved on the left driving shaft 172 and the right driving shaft 172, two first timing pulleys 174 are respectively sleeved on the middle driving shaft 172, the first timing pulley 174 on the left side is connected with one first timing pulley 174 in the middle through a timing belt 175, the first timing pulley 174 on the right side is connected with the other first timing pulley 174 in the middle through a timing belt 175, and the second timing pulley 176 is engaged with one timing belt 175.

In addition to a synchronous belt drive, in other embodiments, the drive 173 may also be a chain drive. The chain transmission mechanism also has the advantages of no slip, accurate transmission ratio, larger center distance and the like, and the obtained beneficial effect is the same as that of the synchronous belt transmission mechanism.

In some embodiments, as shown in fig. 18 and 19, the camera module testing apparatus further includes a test box 4 disposed on the mounting frame 14, the test box 4 being configured to house therein the drive module 21 and the testing device 3. This not only protects the drive module 21 and the test device 3, but also makes the arrangement of the drive module 21 and the test device 3 more compact.

In some embodiments, as shown in fig. 26, 27 and 28, fig. 26 is a schematic structural diagram of the circuit board placing table 16 after the camera module 100 is removed from fig. 24, fig. 27 is a schematic structural diagram of the second electrical connector 7 in fig. 26, and fig. 28 is an exploded view of the circuit board placing table 16, the adapting circuit board 5 and the test box 4 in fig. 19. The camera module test apparatus further includes a relay circuit board 5, a first electrical connector 6, and a second electrical connector 7, the relay circuit board 5 being disposed between the test box 4 and the circuit board placing stage 16, the first electrical connector 6 connecting the relay circuit board 5 and the test box 4, the second electrical connector 7 being configured to connect the relay circuit board 5 and the connection terminal 121.

The connecting end 121 of the flexible circuit board 120 is connected with the test box 4 through the second electrical connector 7, the adapting circuit board 5 and the first electrical connector 6, so that the connection between the test box 4 and the connecting end 121 of the flexible circuit board 120 is facilitated, and the arrangement position of the test box 4 is more flexible.

As shown in fig. 29 and 30, fig. 29 is a schematic structural view of the adapting circuit board 5 in fig. 26, and fig. 30 is a schematic structural view of the test box 4 in fig. 26. The first electrical connector 6 includes a male connector 61 disposed on the adapting circuit board 5, and a female connector 62 disposed on the test box 4.

As shown in fig. 18 and 19, when the camera placement stage 15 and the circuit board placement stage 16 are provided in plural pairs, the test cassettes 4 and the relay circuit boards 5 are provided in plural numbers to meet the test requirements of the plurality of camera modules 100.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. The utility model provides a camera module test equipment, camera module include camera and one end with the flexible circuit board that the camera is connected, the other end of flexible circuit board is the link, its characterized in that, camera module test equipment includes:

a bending device configured to bend and unfold the flexible circuit board;

the detection device comprises a driving module and a processing module, wherein the driving module is configured to be electrically connected with the connecting end so as to drive the camera to work; the processing module is configured to be electrically connected with the connecting terminal for detecting whether the connecting terminal outputs a target image signal;

the testing device is configured to be electrically connected with the connecting end so as to be used for acquiring target electrical parameters of the camera module.

2. The camera module testing apparatus according to claim 1,

the processing module is configured to:

controlling the bending device to bend the flexible circuit board for preset times;

then after the driving module sends a driving signal for driving the camera to work to the connecting end, whether the connecting end outputs the target image signal is detected;

and if the target image signal is not detected to be output by the connecting end, recording the times of bending the flexible circuit board by the bending device and/or sending an alarm signal.

3. The camera module testing apparatus according to claim 2,

the driving signal comprises a starting signal for starting the camera to enter a camera shooting state; the target image signal comprises a video signal, and the video signal comprises a plurality of frame image signals;

the processing module is configured to:

after the driving module sends the starting signal to the connecting end, whether the connecting end outputs the video signal is detected;

and if the video signal output by the connecting end is not detected, recording the times of bending the flexible circuit board by the bending device and/or sending an alarm signal.

4. The camera module testing apparatus according to claim 3,

the driving signal also comprises a photographing signal for enabling the camera to photograph;

the processing module is configured to:

if the video signal is detected to be output by the connecting end, and after the driving module sends the photographing signal to the connecting end, whether the connecting end outputs one or more frames of the image signal is detected;

if the connection end outputs one or more frames of image signals, recording the times of bending the flexible circuit board by the bending device and/or sending out an alarm signal.

5. The camera module testing apparatus according to claim 1,

the camera module testing equipment comprises the processing module and the testing device;

the processing module is configured to:

then, according to the target electrical parameter obtained by the testing device, determining the relation between the target electrical parameter and a preset interval;

and if the target electrical parameters are outside the preset interval, recording the times of bending the flexible circuit board by the bending device and/or sending out an alarm signal.

6. The camera module testing apparatus according to claim 1,

the processing module is configured to perform the steps of:

n100, controlling the bending device to bend the flexible circuit board for preset times;

n200, determining the relation between the target electrical parameter and a preset interval according to the target electrical parameter acquired by the testing device; after the driving module sends a driving signal for driving the camera to work to the connecting end, whether the connecting end outputs the target image signal is detected;

if the target electrical parameters are outside the preset interval or the target image signals output by the connecting end are not detected, recording the times of bending the flexible circuit board by the bending device and/or sending out alarm signals;

if the target electrical parameter is located in the preset interval and the connection end is detected to output the target image signal, the steps N100-N200 are executed in a circulating mode until the target electrical parameter is located outside the preset interval or the connection end is not detected to output the target image signal.

7. The camera module testing apparatus according to any one of claims 1 to 6,

the connecting end comprises a plurality of connecting pins;

the test device includes:

a power supply unit;

the first ends of the plurality of test lines are connected with the power supply unit, the second ends of the plurality of test lines are configured to be connected with the plurality of connecting pins in a one-to-one correspondence manner, and each test line is provided with a first switch device;

a plurality of ground lines, one ends of which are all grounded, and the other ends of which are configured to be connected with the plurality of connection pins in a one-to-one correspondence manner, wherein each ground line is provided with a second switching device;

the parameter detection unit is configured to acquire the target electrical parameters of the connection pin electrically conducted with the power supply unit, and the target electrical parameters comprise a pin voltage value and/or a pin current value of the connection pin.

8. The camera module testing apparatus according to claim 7,

the power supply unit comprises a constant current source and a constant voltage source, the constant current source is connected with the first ends of the plurality of test lines through a first connecting line, and a third switching device is arranged on the first connecting line;

the constant voltage source is connected with the first ends of the plurality of test lines through a second connecting line, and a fourth switching device is arranged on the second connecting line;

the parameter detection unit includes a voltage detection unit configured to acquire the pin voltage value of the connection pin electrically conducted with the constant current source, and a first current detection unit configured to acquire the pin current value of the connection pin electrically conducted with the constant current source.

9. The camera module testing apparatus according to claim 8,

the voltage detection unit comprises two voltage detection ends, one voltage detection end is connected with the first connecting circuit, and the other voltage detection end is grounded;

and/or the first current detection unit is arranged on the second connection line.

10. The camera module testing apparatus according to any one of claims 1 to 9,

the connection end comprises a plurality of the connection pins, and the plurality of connection pins comprise a plurality of input pins; the driving module is configured to be connected with the plurality of input pins in a one-to-one correspondence manner through a plurality of third connecting lines;

the test device further comprises a second current detection unit, wherein the second current detection unit is configured to acquire an input current value input to the input pin by the driving module; wherein the target electrical parameter comprises the input current value.

11. The camera module testing apparatus of claim 10,

and each third connecting line is provided with the second current detection unit.

12. The camera module testing apparatus of claim 10,

each third connecting line is provided with a fifth switching device;

the second current detection unit comprises two current detection ends, one current detection end is connected with the plurality of third connecting lines in a one-to-one correspondence mode through a plurality of fourth connecting lines, and a connection point of the fourth connecting lines and the third connecting lines is located between the driving module and the fifth switching device; the other current detection end is configured to be connected with the plurality of input pins in a one-to-one correspondence mode through a plurality of fifth connecting lines;

and a sixth switching device is arranged on each fourth connecting line and each fifth connecting line.

13. The camera module testing apparatus according to any one of claims 1 to 12,

the bending device comprises:

a mounting frame;

the camera placing table is provided with a camera placing part for placing the camera;

the circuit board placing table is relatively fixed with the mounting rack, and is provided with a circuit board placing part for placing the connecting end;

and the bending driving device is configured to drive the camera placing table to move relative to the circuit board placing table so as to bend and flatten the flexible circuit board.

14. The camera module testing apparatus of claim 13,

the camera placing part is a placing cavity, and an avoiding opening for the flexible circuit board to stretch out and a camera hole for the camera lens of the camera are formed in the cavity wall of the placing cavity.

15. The camera module testing apparatus of claim 14,

a placing groove is formed in the camera placing table; the bending device further comprises a limiting part, and the limiting part is detachably connected with the camera placing table, so that the limiting part and the placing groove form the placing cavity.

16. The camera module testing apparatus of claim 15,

the locating part is provided with a containing groove, and the containing groove and the placing groove form the placing cavity.

17. The camera module testing apparatus according to any one of claims 13 to 16,

the circuit board placing section includes:

the positioning groove is formed in the circuit board placing table;

and the crimping piece is detachably connected with the circuit board placing table and is used for crimping the connecting end into the positioning groove.

18. The camera module testing apparatus according to any one of claims 13 to 17,

the camera module testing device further comprises a testing box arranged on the mounting frame, and the driving module and the testing device are arranged in the testing box.

19. The camera module testing apparatus according to claim 18,

the camera module test apparatus further includes:

the switching circuit board is arranged between the test box and the circuit board placing table;

the first electric connector is used for connecting the adapter circuit board and the test box;

a second electrical connector configured to connect the relay circuit board and the connection terminal.

20. The camera module testing apparatus according to any one of claims 13 to 19,

the camera placing table is provided with a plurality of camera placing parts side by side, and the circuit board placing table is correspondingly provided with a plurality of circuit board placing parts along the arrangement direction of the camera placing parts.

21. The camera module testing apparatus according to any one of claims 13 to 20,

the bending device comprises a plurality of pairs of camera placing tables and circuit board placing tables;

the bending driving device is configured to drive the camera placing tables in each pair to synchronously move relative to the circuit board placing tables so as to bend and flatten the corresponding flexible circuit board.

22. The camera module testing device according to claim 21,

the bending driving device comprises:

the driving shafts are rotatably arranged on the mounting rack and are connected with the camera placing tables in a one-to-one correspondence manner;

the driving motor is arranged on the mounting frame and can drive the driving shafts to synchronously rotate through the transmission mechanism so as to drive the cameras to place the circuit board placing table which corresponds to the camera placing table to overturn, and the flexible circuit board arranged on the camera placing table is bent.

23. The camera module testing apparatus of claim 22,

the transmission mechanism is a synchronous belt transmission mechanism or a chain transmission mechanism.

24. The testing method of the camera module comprises the following steps of:

bending the flexible circuit board for preset times and sending a driving signal for driving the camera to work to the connecting end;

then, detecting whether the connecting end outputs a target image signal;

and if the target image signal is not detected to be output by the connecting end, recording the bending times of the flexible circuit board and/or sending an alarm signal.

25. The method for testing a camera module according to claim 24,

after bending the flexible circuit board for the preset times, the testing method of the camera module comprises the following steps:

sending a starting signal for starting the camera to enter a camera shooting state to the connecting end; wherein the drive signal comprises the start signal;

then, whether the connection end outputs a video signal is detected; wherein the target image signal comprises the video signal, the video signal comprising a number of frames of image signals;

and if the video signal output by the connecting end is not detected, recording the bending times of the flexible circuit board and/or sending an alarm signal.

26. The method for testing a camera module according to claim 25,

if the video signal output by the connecting end is detected, the testing method of the camera module further comprises the following steps:

sending a photographing signal for enabling the camera to photograph to the connecting end; wherein the driving signal comprises the photographing signal;

then, detecting whether the connecting end outputs one or more frames of the image signals;

if the connection end is not detected to output one or more frames of the image signals, the bending times of the flexible circuit board are recorded and/or an alarm signal is sent out.

27. The testing method of the camera module comprises the following steps of:

bending the flexible circuit board for a preset number of times;

then acquiring target electrical parameters of the camera module;

and determining the relation between the target electrical parameter and the preset interval according to the obtained target electrical parameter, and recording the bending times of the flexible circuit board and/or sending an alarm signal if the target electrical parameter is positioned outside the preset interval.

28. The testing method of the camera module comprises the following steps of:

s100, bending the flexible circuit board for preset times;

s200, acquiring a target electrical parameter of the camera module, and determining the relation between the target electrical parameter and a preset interval according to the acquired target electrical parameter; after a driving signal for driving the camera to work is input to the connecting end, whether the connecting end outputs a target image signal is detected;

if the target electrical parameters are outside the preset interval or the target image signals output by the connecting end are not detected, recording the bending times of the flexible circuit board and/or sending out alarm signals;

if the target electrical parameter is located in the preset interval, or the connection end is detected to output the target image signal, the steps S100-S200 are executed in a circulating mode until the target electrical parameter is located outside the preset interval, or the connection end is not detected to output the target image signal.