Testing device and method for camera module

Abstract

The invention discloses a testing device and method for a camera module. The device comprises an upper cover adapter plate, a testing base and a module testing box. The upper cover adapter plate is provided with an accommodating hole and a conductive contact block; and the first contact part of the conductive contact block is electrically connected with the grounding conductive piece. The test base is provided with an accommodating position, a conductive piece test probe and a connector probe; the conductive piece test probe and the second contact part of the conductive contact block form contact electric connection; the connector probe comprises a first probe and a second probe; the first probe is in contact electrical connection with a pin of the connector electrically connected with the grounding conductive member. The module test box is electrically connected with the first probe and the conductive member test probe so as to measure the current flowing through the grounding conductive member and determine the resistance of the grounding conductive member. And the second probe is also electrically connected with the second probe so as to test image detection information. Image testing and grounding conductive piece resistance testing can be achieved, the resistance testing efficiency can be effectively improved, the method is suitable for full detection, and the comprehensiveness and accuracy of detection can be ensured.

Description

Technical Field

[0001] The present application relates to the technical field of camera module testing, and in particular to a camera module testing device and method. Background Art

[0002] The grounding performance of the camera module will directly affect the stability and safety of the circuit, signal quality, electromagnetic compatibility and the overall reliability of the product. In order to prevent the camera module from interfering with other devices or radio frequency signals after being transferred to electronic devices (such as mobile phones), a grounding conductive member (such as steel sheet, copper foil, conductive sponge, conductive cloth, etc.) is usually set on the back of the connector, and the resistance of the grounding conductive member is measured with a multimeter.

[0003] However, this method has certain drawbacks: on the one hand, the test efficiency of the manually operated multimeter is low, and it is difficult to achieve full inspection in practice, resulting in low comprehensiveness and accuracy of the inspection; on the other hand, the multimeter needle can easily scratch the steel sheet, affecting product quality and even making it impossible to ship. Summary of the invention

[0004] In order to solve at least one problem existing in the prior art, the purpose of the present application is to provide a camera module testing device and method, which can realize image testing and grounding conductive member resistance testing, and has high testing efficiency for grounding conductive member resistance, is suitable for full inspection, and can ensure the comprehensiveness and accuracy of the inspection. Moreover, compared with manual testing with a multimeter, it can effectively avoid scratching the grounding conductive member, which helps to improve product quality and reduce costs.

[0005] To achieve the above-mentioned purpose, the camera module testing device provided in the present application is applied to the camera module; the camera module comprises a camera module body and a connector electrically connected by an FPC; the front side of the connector is provided with a plurality of pins, and the back side is provided with a grounding conductive member; the testing device comprises:

[0006] The upper cover adapter plate is provided with a receiving hole and a conductive contact block; wherein the receiving hole is a through hole opened on the upper cover adapter plate, used to receive the camera module body and expose the camera module lens; the first contact portion of the conductive contact block is arranged in alignment with the grounding conductive member to form a contact electrical connection;

[0007] The test base is provided with a receiving position, a conductive member test probe and a plurality of connector probes; wherein the receiving position is used to receive the FPC and the connector; the contact end of the conductive member test probe is aligned with the second contact portion of the conductive contact block to form a contact electrical connection; the connector probe includes a first probe for testing the resistance of the grounded conductive member and a second probe for testing image detection information; the contact end of the first probe is aligned with the pin of the connector electrically connected to the grounded conductive member to form a contact electrical connection;

[0008] A module test box is electrically connected to the interface end of the first probe and the interface end of the conductive component test probe, respectively, and is used to measure the current flowing through the grounded conductive component and determine the resistance of the grounded conductive component based on the current value; the module test box is also electrically connected to the interface end of the second probe and is used to test the image detection information of the camera module.

[0009] Optionally, a voltage-dividing resistor is further provided on the test base; and the interface end of the conductive component test probe is electrically connected to the module test box via the voltage-dividing resistor.

[0010] Optionally, the first contact portion and the second contact portion are connected by a wire.

[0011] Optionally, the conductive member test probe and the connector probe are configured as elastic probes.

[0012] Optionally, a conductive adhesive layer is attached to the lower surface of the first contact portion of the conductive contact block.

[0013] Optionally, the module test box is specifically used for:

[0014] Obtaining a power supply voltage and a test circuit resistance of a test circuit where the first probe and the conductive member test probe are located;

[0015] measuring a current flowing through the grounded conductive member;

[0016] The resistance of the grounded conductive member is determined based on the supply voltage, the test circuit resistance and the current.

[0017] Further optionally, the module test box is also used for:

[0018] Measuring the current flowing through the grounded conductive member multiple times and taking an average value of the current;

[0019] The current average value is used as the current value for determining the resistance.

[0020] Optionally, the module test box is also used for:

[0021] In response to the resistance being greater than or equal to the resistance threshold, determining that the corresponding camera module is a module with substandard grounding performance;

[0022] In response to the resistance being less than the resistance threshold, it is determined that the corresponding camera module is a module that meets the grounding performance standards.

[0023] Further optionally, the resistance threshold is configured to be 2Ω.

[0024] To achieve the above object, the present application also provides a camera module testing method, which is applied to the camera module testing device as described above, and the method comprises:

[0025] Obtaining a power supply voltage and a test circuit resistance of a test circuit where the first probe and the conductive member test probe are located;

[0026] measuring a current flowing through the grounded conductive member;

[0027] The resistance of the grounded conductive member is determined based on the supply voltage, the test circuit resistance and the current.

[0028] The present application discloses a camera module testing device and method, which accommodates the camera module body and exposes the camera module lens by designing an accommodation hole, and forms a contact electrical connection with the grounding conductive member through the first contact portion of the conductive contact block, and accommodates the FPC and the connector by designing an accommodation position, and electrically connects the conductive member test probe with the second contact portion of the conductive contact block, and electrically connects the first probe with the pin of the connector electrically connected to the conductive contact block, and electrically connects the first probe and the conductive member test probe respectively through the module test box to measure the current flowing through the grounding conductive member, and determines the resistance of the grounding conductive member based on the current value, and electrically connects the module test box with the second probe to test the image detection information of the camera module. Thus, the image detection information test and the grounding conductive member resistance test of the camera module can be realized at the same time, so that the test efficiency of the grounding conductive member resistance can be effectively improved, which is suitable for full inspection and can ensure the comprehensiveness and accuracy of the inspection. Moreover, compared with the manual test of the multimeter, it can effectively avoid scratching the grounding conductive member, which helps to improve product quality and reduce costs.

[0029] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent from the description, or may be understood by practicing the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings:

[0031] Figure 1 is a cross-sectional view of a camera module testing device and a camera module according to an embodiment of the present application;

[0032] Figure 2 for Figure 1 A cross-sectional view of a camera module in FIG.

[0033] Figure 3 A bottom view of a camera module according to an embodiment of the present application;

[0034] Figure 4 for Figure 1 A cross-sectional view of the upper cover adapter plate in FIG.

[0035] Figure 5 for Figure 1 A cross-sectional view of the test base in FIG.

[0036] Figure 6 The present invention is a flowchart of a method for testing a camera module according to an embodiment of the present application.

[0037] Specifically, the following reference numerals are included:

[0038] Camera module testing device 100; upper cover adapter plate 110; receiving hole 111; conductive contact block 112; first contact portion 113; second contact portion 114; test base 120; receiving position 121; conductive component test probe 122; connector probe 123; voltage divider resistor 124;

[0039] Camera module 200 ; camera module body 210 ; FPC 220 ; connector 230 ; grounding conductive member 240 . DETAILED DESCRIPTION

[0040] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present application. It should be understood that the drawings and embodiments of the present application are only for exemplary purposes and are not intended to limit the scope of protection of the present application.

[0041] The term "including" and its variations used herein are open inclusions, i.e., "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the following description.

[0042] It should be noted that the concepts such as "first" and "second" mentioned in this application are only used to distinguish different devices, modules, units or data, and are not used to limit the order or interdependence of the functions performed by these devices, modules, units or data.

[0043] It should be noted that the modifications of "one" and "plurality" mentioned in this application are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more". "Plurality" should be understood as two or more.

[0044] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0045] First of all, it should be noted that Figure 1-Figure 3 As shown, the camera module testing device 100 is applied to the camera module 200. The camera module 200 includes a camera module body 210, an FPC 220 and a connector 230. The camera module body 210 and the connector 230 are electrically connected by the FPC 220; the front side of the connector 230 is provided with a plurality of pins, and the back side is provided with a grounding conductive member 240.

[0046] In a specific example, the camera module body 210 may include a lens, an image sensor, and an image processing chip; the orientation of the lens is consistent with the orientation of the back of the connector 230 .

[0047] The camera module testing device 100 includes: an upper cover adapter plate 110, a test base 120 and a module testing box (not shown in the figure).

[0048] Among them, Figure 1 and Figure 4 As shown, the upper cover adapter plate 110 is provided with a receiving hole 111 and a conductive contact block 112. The receiving hole 111 is a through hole opened in the upper cover adapter plate 110, which is used to receive the camera module body 210 and expose the lens of the camera module 200. The conductive contact block 112 includes a first contact portion 113 and a second contact portion 114. The first contact portion 113 is arranged in alignment with the grounding conductive member 240 to form a contact electrical connection.

[0049] In a specific embodiment, the first contact portion 113 and the second contact portion 114 may be connected via a wire to increase the resistance of the test circuit and reduce the current by voltage division to prevent the current value from exceeding the upper limit of the tooling.

[0050] like Figure 1 and Figure 5 As shown, the test base 120 is provided with a receiving position 121, a conductive member test probe 122 and a plurality of connector probes 123. The receiving position 121 is used to receive the FPC 220 and the connector 230; the contact end of the conductive member test probe 122 is aligned with the second contact portion 114 of the conductive contact block 112 to form a contact electrical connection. The connector probe 123 includes a first probe for testing the resistance of the grounded conductive member 240 and a second probe for testing image detection information. The contact end of the first probe is aligned with the pin of the connector 230 electrically connected to the grounded conductive member 240 to form a contact electrical connection.

[0051] In a specific embodiment, the conductive member test probe 122 and the connector probe 123 are preferably configured as spring probes.

[0052] It should be noted that the probes (such as the conductive part test probe 122 and the connector probe 123) all include a contact end and an interface end. Among them, the contact end is the end of the probe that directly contacts the object to be tested (such as the connector 230). The contact end is responsible for establishing an electrical connection so as to transmit the test signal to the object to be tested or receive the signal from the object to be tested. The shape and material of the contact end will vary depending on the type of the object to be tested and the test requirements, and can be a pointed head, a round head, a claw head, etc. The interface end is the part where the probe is connected to the test equipment (such as a module test box). It is responsible for transmitting the signal received by the contact end to the test equipment for processing and analysis, or transmitting the signal generated by the test equipment to the contact end for output.

[0053] refer to Figure 1 As shown, the module test box is electrically connected to the interface end of the first probe and the interface end of the conductive component test probe 122, respectively, for measuring the current flowing through the ground conductive component 240 and determining the resistance of the ground conductive component 240 based on the current value; the module test box is also electrically connected to the interface end of the second probe for testing the image detection information of the camera module 200.

[0054] It should be noted that, in a specific example, the image detection information may include at least one of resolution test information, color reproduction test information, contrast and dynamic range test information, white balance test information, light sensitivity and low light performance test information, focus and clarity test information, distortion and geometric distortion test information, glare and ghosting test information, and vignetting effect test information.

[0055] like Figure 1-Figure 5 As shown, when the camera module test device 100 is used, the camera module 200 is placed flat on the receiving position 121 of the test base 120, with the lens facing upward, and the pins on the front of the connector 230 are aligned with the corresponding connector probes 123 on the test base 120. Then, the upper cover adapter plate 110 is covered on the test base 120, so that the receiving hole 111 accommodates the camera module body 210 and exposes the camera module 200 lens, and the first contact portion 113 of the conductive contact block 112 is aligned with the grounding conductive member 240, and the second contact portion 114 of the conductive contact block 112 is aligned with the contact end of the conductive member test probe 122. In this way, a grounding conductive member resistance test circuit consisting of the module test box, the first probe, the connector 230, the grounding conductive member 240, the conductive contact block 112 and the conductive member test probe 122 is formed.

[0056] Then, the camera module 200 is turned on, and the grounding conductive member resistance test circuit is powered (such as VDD) through the module test box, and the grounding conductive member 240 and GND (ground wire) are turned on to measure the current flowing through the grounding conductive member 240, and the resistance of the grounding conductive member 240 is determined based on the measured current value. In addition, before or after the grounding conductive member resistance test, the camera module 200 is also image-detected through the module test box.

[0057] Thus, the test device can realize the image detection information test of the camera module 200 and the grounding conductive member resistance test, thereby effectively improving the test efficiency of the grounding conductive member 240 resistance, being suitable for full inspection, and ensuring the comprehensiveness and accuracy of the inspection. Moreover, compared with the manual test of the multimeter, it can effectively avoid scratching the grounding conductive member 240, which helps to improve product quality and reduce costs.

[0058] In the embodiment of the present application, a conductive adhesive layer is preferably attached to the lower surface of the first contact portion 113 of the conductive contact block 112. The conductive adhesive layer as an elastic material can form a good contact with the grounding conductive member 240, which helps to improve the accuracy of the resistance test.

[0059] In the present application embodiment, Figure 5 As shown, a voltage divider resistor 124 is also provided on the test base 120. The interface end of the conductive component test probe 122 is electrically connected to the module test box via the voltage divider resistor 124 to reduce the current and prevent the current value from exceeding the upper limit of the tooling.

[0060] In an embodiment of the present application, the module test box can be specifically used to: obtain the power supply voltage and test circuit resistance of the test circuit where the first probe and the conductive member test probe 122 are located; measure the current flowing through the grounding conductive member 240; and determine the resistance of the grounding conductive member 240 based on the power supply voltage, test circuit resistance and current.

[0061] The test circuit resistance is the resistance of the grounding conductive member resistance test circuit excluding the grounding conductive member 240 .

[0062] In a specific example, the resistance of the ground conductive member 240 may be determined in the following manner:

[0063] Rg=(V / I-Rc)

[0064] Wherein, Rg is the resistance of the grounded conductive member; V is the power supply voltage of the test circuit; I is the current flowing through the grounded conductive member; and Rc is the resistance of the test circuit.

[0065] Furthermore, the module test box can also be used to: measure the current flowing through the grounding conductive member 240 multiple times and take the current average value; and use the current average value as the current value for determining the resistance of the grounding conductive member, thereby improving the accuracy of current measurement and the reliability of testing.

[0066] In the embodiment of the present application, the module test box is also used to: in response to the resistance being greater than or equal to the resistance threshold, determine that the corresponding camera module 200 is a module with substandard grounding performance; in response to the resistance being less than the resistance threshold, determine that the corresponding camera module 200 is a module with substandard grounding performance. In a specific example, the resistance threshold is configured as 2Ω. That is, it is possible to further automatically determine and filter out modules with substandard grounding performance and modules with substandard grounding performance, thereby further improving the convenience of testing.

[0067] In summary, according to the test device of the camera module of the embodiment of the present application, the camera module body is accommodated and the camera module lens is exposed by designing the accommodation hole, and the first contact portion of the conductive contact block is electrically connected to the grounded conductive member, and the FPC and the connector are accommodated by designing the accommodation position, and the conductive member test probe is electrically connected to the second contact portion of the conductive contact block, and the first probe is electrically connected to the pin of the connector electrically connected to the conductive contact block, and the module test box is electrically connected to the first probe and the conductive member test probe respectively, to measure the current flowing through the grounded conductive member, determine the resistance of the grounded conductive member based on the current value, and test the image detection information of the camera module by electrically connecting the module test box to the second probe. Thus, the image detection information test of the camera module and the grounded conductive member resistance test can be realized at the same time, thereby effectively improving the test efficiency of the grounded conductive member resistance, being suitable for full inspection, and ensuring the comprehensiveness and accuracy of the inspection. Moreover, compared with the manual test of the multimeter, it can effectively avoid scratching the grounded conductive member, which helps to improve product quality and reduce costs.

[0068] Figure 6 FIG. 1 is a flow chart of a method for testing a camera module according to this specific embodiment. Figure 6 As shown, the camera module testing method is applied to the camera module testing device in the above embodiment, comprising the following steps:

[0069] Step 301 , obtaining a power supply voltage and a test circuit resistance of a test circuit where a first probe and a conductive member test probe are located.

[0070] Step 302: measuring the current flowing through the grounded conductive member.

[0071] Step 303, determining the resistance of the grounding conductive member according to the supply voltage, the test circuit resistance and the current.

[0072] In an embodiment of the present application, the method may further include: measuring the current flowing through the grounded conductive member multiple times and taking an average current value; and using the average current value as the current for determining the resistance.

[0073] In the present application embodiment, Figure 6 As shown, the method may further include the following steps:

[0074] Step 304 , in response to the resistance being less than the resistance threshold, determining that the corresponding camera module is a module that meets the grounding performance standards.

[0075] Step 305 , in response to the resistance being greater than or equal to the resistance threshold, determining that the corresponding camera module is a module with substandard grounding performance.

[0076] It should be noted that the explanation of the camera module testing method in the above embodiment is also applicable to the camera module testing device in the above embodiment, and will not be repeated here.

[0077] It should be understood that, although the steps in the flowcharts of the accompanying drawings of the specification are displayed in sequence according to the indications of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowchart may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these sub-steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the sub-steps or stages of other steps.

[0078] It should be noted that the specific numerical values ​​mentioned above are only used as examples to illustrate the implementation of the present application in detail, and should not be understood as limiting the present application. In other examples or implementations or embodiments, other numerical values ​​can be selected according to the present application, and are not specifically limited here.

[0079] Those skilled in the art can understand that the above are only preferred embodiments of the present application and are not intended to limit the present application. Although the present application is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A camera module testing device, characterized in that: Applied to camera module; The camera module comprises a camera module body and a connector electrically connected by an FPC; a plurality of pins are arranged on the front of the connector, and a grounding conductive member is arranged on the back; the testing device comprises: The upper cover adapter plate is provided with a receiving hole and a conductive contact block; wherein the receiving hole is a through hole opened on the upper cover adapter plate, used to receive the camera module body and expose the camera module lens; the first contact portion of the conductive contact block is arranged in alignment with the grounding conductive member to form a contact electrical connection; The test base is provided with a receiving position, a conductive member test probe and a plurality of connector probes; wherein the receiving position is used to receive the FPC and the connector; the contact end of the conductive member test probe is aligned with the second contact portion of the conductive contact block to form a contact electrical connection; the connector probe includes a first probe for testing the resistance of the grounded conductive member and a second probe for testing image detection information; the contact end of the first probe is aligned with the pin of the connector electrically connected to the grounded conductive member to form a contact electrical connection; A module test box is electrically connected to the interface end of the first probe and the interface end of the conductive component test probe, respectively, and is used to measure the current flowing through the grounded conductive component and determine the resistance of the grounded conductive component based on the current value; the module test box is also electrically connected to the interface end of the second probe and is used to test the image detection information of the camera module.

2. The testing device according to claim 1, characterized in that: The test base is also provided with a voltage-dividing resistor; the interface end of the conductive component test probe is electrically connected to the module test box via the voltage-dividing resistor.

3. The testing device according to claim 1, characterized in that: The first contact portion and the second contact portion are connected by a wire.

4. The testing device according to claim 1, characterized in that: The conductive member test probe and the connector probe are configured as spring probes.

5. The testing device according to claim 1, characterized in that: A conductive adhesive layer is attached to the lower surface of the first contact portion of the conductive contact block.

6. The testing device according to claim 1, characterized in that: The module test box is specifically used for: Obtaining a power supply voltage and a test circuit resistance of a test circuit where the first probe and the conductive member test probe are located; measuring a current flowing through the grounded conductive member; The resistance of the grounded conductive member is determined based on the supply voltage, the test circuit resistance and the current.

7. The testing device according to claim 6, characterized in that: The module test box is also used for: Measuring the current flowing through the grounded conductive member multiple times and taking an average value of the current; The current average value is used as the current value for determining the resistance.

8. The testing device according to claim 6, characterized in that: The module test box is also used for: In response to the resistance being greater than or equal to the resistance threshold, determining that the corresponding camera module is a module with substandard grounding performance; In response to the resistance being less than the resistance threshold, it is determined that the corresponding camera module is a module that meets the grounding performance standards.

9. The testing device according to claim 8, characterized in that: The resistance threshold is configured to be 2Ω.

10. A camera module testing method, characterized in that: A test device for a camera module as claimed in any one of claims 1 to 9, wherein the method comprises: Obtaining a power supply voltage and a test circuit resistance of a test circuit where the first probe and the conductive member test probe are located; measuring a current flowing through the grounded conductive member; The resistance of the grounded conductive member is determined based on the supply voltage, the test circuit resistance and the current.

Images