Intelligent activation and test system for conductive silver adhesive

Abstract

The utility model discloses an intelligent activation and test system for a conductive silver adhesive, and the conductive silver adhesive is connected between a metal support and a housing of a voice coil motor. The metal support, the conductive silver adhesive and the voice coil motor shell form a conductive path, and the voice coil motor comprises a first ejector pin, a second ejector pin, a counting delay module, an ADC conversion module, a test master control box and an integrated communication module; the test master control box is connected with the first ejector pin and the second ejector pin through the integrated communication module. The integrated communication module electrifies the conductive silver adhesive through the first ejector pin and the second ejector pin; the ADC conversion module is used for calculating the resistance value of the conductive silver adhesive, and the ADC conversion module is connected with the integrated communication module; and the counting delay module is used for controlling the power-on time of the conductive silver adhesive and is connected with the integrated communication module. According to the utility model, the conductive silver adhesive can be accurately and conveniently activated, and the efficiency of measuring the resistance of the conductive silver adhesive is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of conductive silver paste resistance testing, and in particular relates to an intelligent activation and testing system for conductive silver paste. Background Art

[0002] In recent years, the market demand for the appearance, performance and quality of camera modules has become increasingly higher, and its quality directly affects the overall experience of taking photos and recording videos. Therefore, camera module manufacturers are becoming more and more strict with their own product processes. At present, most solutions for fixing cameras and brackets use resin epoxy UV glue (shadowless glue). This type of glue is not conductive and heat-conductive, which makes the camera module in the whole machine ESD (electrostatic impedance) and EMC (electromagnetic compatibility) easily damage the camera photosensitive chip. At present, some manufacturers use point conductive silver glue and select appropriate curing temperature to bond the base bracket of the mobile phone camera module and the voice coil motor housing to form a conductive path to improve the product's EMI (electromagnetic interference) anti-interference performance and image quality. Conductive silver glue is a colloidal material with conductive properties. It is often used in electronic devices, circuit connections and electromagnetic shielding. It is mainly composed of adhesives, conductive fillers and additives. The composition of the adhesive determines the bonding strength and aging resistance of the conductive silver glue.

[0003] At present, most manufacturers use manual power-on to activate the conductive silver glue. This method is very inefficient and the power-on time is difficult to control. Therefore, in order to reduce costs, some module manufacturers will not use power-on to activate the conductive silver glue when testing the conductive silver glue between the camera module and the metal. Even if the conductive silver glue is activated manually, most manufacturers currently use a multimeter to test the electrical impedance of the conductive silver glue, which is inefficient and inconvenient to operate. Therefore, the conductive silver glue will not be tested for each camera module during production.

[0004] In view of this, it is necessary to develop an intelligent activation and testing system for conductive silver glue. Utility Model Content

[0005] The purpose of the utility model is to provide an intelligent activation and testing system for conductive silver glue, which can not only realize the rapid activation of the conductive silver glue, but also improve the testing efficiency of the conductive silver glue resistance of the camera.

[0006] The utility model provides a conductive silver glue intelligent activation and testing system, wherein the conductive silver glue is connected between a metal bracket and a housing of a voice coil motor; the metal bracket, the conductive silver glue and the housing of the voice coil motor constitute a conductive path, characterized in that it includes a first ejector pin, a second ejector pin, a counting delay module, an ADC conversion module, a test main control box and an integrated communication module;

[0007] The test main control box is connected to the first ejector pin and the second ejector pin respectively through the integrated communication module, wherein the first ejector pin is used to realize electrical connection with the metal bracket; the second ejector pin is used to realize electrical connection with the voice coil motor housing; the integrated communication module energizes the conductive silver glue through the first ejector pin and the second ejector pin;

[0008] The ADC conversion module is used to calculate the resistance value of the conductive silver paste, and the ADC conversion module is connected to the integrated communication module;

[0009] The counting delay module is used to control the power-on time of the conductive silver paste, and the counting delay module is connected to the integrated communication module.

[0010] Optionally, a host is also included, which is used to determine whether the resistance value of the conductive silver paste meets a preset requirement, and the host is connected to the test main control box.

[0011] Optionally, a display module is also included for displaying the test results, and the display module is connected to the host.

[0012] Optionally, the counting delay module includes a counting delay chip U2, and the integrated communication module includes a connector J1, and the connection relationship thereof is as follows:

[0013] Pin 3 of the counting delay chip U2 is connected to pin 8 of the connector J1;

[0014] Pins 7 and 8 of the counting delay chip U2 are connected to a power source.

[0015] Optionally, the ADC conversion module includes an ADC conversion chip U1, and the connection relationship thereof is as follows:

[0016] Pin 3 of the ADC conversion chip U1 is connected to DGND;

[0017] Pin 4 of the ADC conversion chip U1 is connected to pin 39 of the connector J1;

[0018] Pin 5 of the ADC conversion chip U1 is connected to pin 37 of the connector J1;

[0019] Pin 6 of the ADC conversion chip U1 is connected to DOVDD;

[0020] Pins 7 and 8 of the ADC conversion chip U1 are connected to VCC respectively.

[0021] Optionally, it also includes a voltage divider resistor R1, one end of the voltage divider resistor R1 is connected to pin 6 of the ADC conversion chip U1, and the other end of the voltage divider resistor R1 is connected to pin 3 of the ADC conversion chip U1 through conductive silver glue, and the connection point between the voltage divider resistor R1 and the conductive silver glue is connected to the test main control box.

[0022] Optionally, a Type-C interface is further included, wherein pin 1 of the Type-C interface is connected to pin 9 of the counting delay chip U2, and pins 3 and 4 of the Type-C interface are both connected to a power supply.

[0023] Beneficial effects of the utility model:

[0024] (1) The utility model controls the power-on time of the camera conductive silver glue by setting a counting delay module, and can automatically power on and activate the conductive silver glue.

[0025] (2) The utility model uses an external ADC conversion module and Ohm's law to divide the voltage. The resistance value of the conductive silver paste is calculated by measuring the voltage of the conductive silver paste after voltage division, and whether it is qualified is judged based on the resistance value. The test accuracy can be improved to 0.05Ω.

[0026] (3) The utility model also displays the test results through a display module, so that the test data can be viewed intuitively.

[0027] In summary, the utility model can realize automatic power-on activation of the conductive silver paste and automatic testing of the resistance value of the conductive silver paste, thereby greatly improving the testing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a flow chart of manually activating the conductive silver paste and measuring the resistance value of the conductive silver paste.

[0029] Figure 2 This is the camera module structure diagram;

[0030] Figure 3 This is an exploded view of the camera module;

[0031] Figure 4 It is a structural schematic diagram of the intelligent activation and testing system for conductive silver paste described in the embodiment of the present application;

[0032] Figure 5 It is a principle block diagram of an embodiment of the present application;

[0033] Figure 6 is a circuit block diagram of an embodiment of the present application;

[0034] Figure 7 is a principle block diagram of the voltage-dividing resistor R1 in the embodiment of the present application;

[0035] Figure 8 It is a flow chart of the test steps in the embodiment of the present application.

[0036] In the figure, 1- counting delay module, 2- ADC conversion module, 3- test main control box, 4- host, 5- integrated communication module, 6- FPC connector, 7- display module, 8- camera module, 80- bracket, 81- voice coil motor, 82- optical lens, 83- filter, 84- photosensitive chip, 85- conductive silver glue, 86- metal bracket, 87- circuit board, 88- connector, 9- Type-C interface; 10- fixing fixture, 11- first ejector pin, 12- second ejector pin. DETAILED DESCRIPTION

[0037] The following will describe the implementation of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0038] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0039] like Figure 1 As shown, it is a process of manually activating the conductive silver glue 85 and measuring the resistance value of the conductive silver glue 85. As shown below: First, start the test main control box 3 and power the conductive silver glue 85 through a DC power supply. A stopwatch is used manually to time, and when the preset power-on time is reached, the power supply of the conductive silver glue is manually cut off. Then the resistance value of the conductive silver glue is tested with a multimeter. If the resistance value of the conductive silver glue 85 is less than 5Ω, the camera is manually started to power on and output the image. When the resistance value of the conductive silver glue 85 is ≥5Ω, the test is terminated. However, the problem with this method is that the test efficiency is very low when manually powering on to activate the conductive silver glue 85 and test the resistance value of the conductive silver glue 85.

[0040] In order to solve the above problems, the present application provides an intelligent activation and testing system for conductive silver paste, see Figures 4 to 7 .

[0041] like Figure 2 and Figure 3As shown, in the embodiment of the present application, the camera module 8 includes a bracket 80, a voice coil motor 81, an optical lens 82, a filter 83, a photosensitive chip 84, a conductive silver glue 85, a metal bracket 86, a circuit board 87 and a connector 88. The camera module 8 in this embodiment is consistent with the camera module of the prior art, and the specific principle and connection method are not repeated here.

[0042] like Figure 4 and Figure 5 As shown, in the embodiment of the present application, a conductive silver glue intelligent activation and testing system is provided, wherein the conductive silver glue 85 is connected between the metal bracket 86 and the housing of the voice coil motor 81; the metal bracket 86, the conductive silver glue 85 and the housing of the voice coil motor 81 constitute a conductive path. The conductive silver glue intelligent activation and testing system comprises a first ejector pin 11, a second ejector pin 12, a counting delay module 1, an ADC conversion module 2, a test main control box 3 and an integrated communication module 5. The test main control box 3 is connected to the first ejector pin 11 and the second ejector pin 12 respectively through the integrated communication module 5, wherein the first ejector pin 11 is used to realize electrical connection with the metal bracket 86; the second ejector pin 12 is used to realize electrical connection with the housing of the voice coil motor 81; the integrated communication module 5 energizes the conductive silver glue 85 through the first ejector pin 11 and the second ejector pin 12. The ADC conversion module 2 is used to calculate the resistance value of the conductive silver glue 85, and the ADC conversion module 2 is connected to the integrated communication module 5. The counting delay module 1 is used to control the power-on time of the conductive silver glue 85 , and the counting delay module 1 is connected to the integrated communication module 5 .

[0043] In some embodiments, a conductive silver paste intelligent activation and testing system further includes a host 4 , which is used to determine whether the resistance value of the conductive silver paste 85 meets preset requirements. The host 4 is connected to the test main control box 3 .

[0044] In some embodiments, a conductive silver paste intelligent activation and testing system further includes a display module 7, which is used to display the test results, and the display module 7 is connected to the host 4. Preferably, the display module 7 is an LCD display screen with a touch function, which is convenient for operation and display.

[0045] like Figure 6 As shown, in the conductive silver glue intelligent activation and testing system of this embodiment, the integrated communication module 5 includes a connector J1. The counting delay module 1 of this embodiment includes a counting delay chip U2, and its connection relationship is as follows: Pin 3 of the counting delay chip U2 is connected to Pin 8 of the connector J1; Pins 7 and 8 of the counting delay chip U2 are connected to the power supply.

[0046] In this embodiment, the power-on time of the conductive silver glue 85 is controlled by the counting delay chip U2. After the power-on time is 3 to 5 seconds, the conductive silver glue 85 is powered off. When the power-on time is too short, the internal characteristics of the conductive silver glue 85 will not be fully optimized. When the conductive silver glue 85 is powered on for more than a certain time, its resistivity remains basically unchanged. Therefore, in this embodiment, the power-on time is controlled to 3 to 5 seconds. It can ensure that the internal characteristics of the conductive silver glue 85 are fully optimized. At the same time, the production efficiency of the product is improved, and the uncontrollable potential risks of the fixing fixture 10, the conductive silver glue 85 and the voice coil motor 81 due to the long power-on time, such as degraded performance, damage, etc., can be avoided.

[0047] like Figure 6 As shown, in the embodiment of the present application, the ADC conversion module 2 includes an ADC conversion chip U1, and its connection relationship is as follows: Pin 3 of the ADC conversion chip U1 is connected to DGND; Pin 4 of the ADC conversion chip U1 is connected to Pin 39 of the connector J1; Pin 5 of the ADC conversion chip U1 is connected to Pin 37 of the connector J1; Pin 6 of the ADC conversion chip U1 is connected to DOVDD; Pin 7 and Pin 8 of the ADC conversion chip U1 are respectively connected to VCC. Preferably, the model of the ADC conversion chip is ADS8699.

[0048] like Figure 6 As shown, in an embodiment of the present application, a conductive silver glue intelligent activation and testing system also includes a voltage divider resistor R1, one end of the voltage divider resistor R1 is connected to pin 6 (i.e., DOVDD pin) of the ADC conversion chip U1, and the other end of the voltage divider resistor R1 is connected to pin 3 (i.e., DGND pin) of the ADC conversion chip U1 through a conductive silver glue 85, and the connection point between the voltage divider resistor R1 and the conductive silver glue 85 is connected to the test main control box 3.

[0049] In the embodiment of the present application, the ADC conversion chip U1 and the voltage divider resistor R1 are connected in the circuit. The conductive silver glue 85 (see Figure 7 One end of the conductive silver glue 85 is grounded, and the other end is connected to DOVDD through the voltage divider resistor R1. This circuit is the key to reading the resistance of the conductive silver glue 85. If DOVDD is set to 1.8V, the resistance of R1 is fixed to 4.7KΩ, and the resistance of the conductive silver glue 85 to be tested is Rx=XΩ. The voltage at point Y can be read by testing the main control box 3, and then the formula Y / X=1.8V / (4700+X) can be used to calculate the resistance of X=4700Y / (1.8-Y) Ω.

[0050] like Figure 6As shown, in the embodiment of the present application, a conductive silver glue intelligent activation and testing system also includes a Type-C interface 9, wherein pin 1 of the Type-C interface 9 is connected to pin 9 of the counting delay chip U2, and pins 3 and 4 of the Type-C interface 9 are connected to the power supply. The Type-C interface 9 is used to reserve an interface for subsequent function expansion.

[0051] like Figure 6 As shown, in the embodiment of the present application, a conductive silver glue intelligent activation and testing system also includes some auxiliary circuits. For example, the resistor R2 has the following connection relationship: one end of the resistor R2 is connected to one end of the conductive silver glue 85, and the other end of the conductive silver glue 85 is connected to the 2nd pin of the ADC conversion chip U1 and the 9th pin of the counting delay chip U2; the 1st pin of the ADC conversion chip U1 is connected to the 5th pin of the counting delay chip U2, and the 6th pin of the counting delay chip U2 is connected to the other end of the resistor R2.

[0052] like Figure 6 As shown, in some embodiments, the auxiliary circuit further includes a resistor R3, one end of the resistor R3 is connected to pin 2 of the Type-C interface 9, and the other end of the resistor R3 is connected to DGND.

[0053] like Figure 6 As shown, in some embodiments, the auxiliary circuit further includes a resistor R4, one end of the resistor R4 is connected to DOVDD, and the other end is connected to pin 39 of the connector J1.

[0054] like Figure 6 As shown, in some embodiments, the auxiliary circuit further includes a resistor R5, one end of the resistor R4 is connected to DOVDD, and the other end is connected to pin 37 of the connector J1.

[0055] like Figure 6 As shown, in the embodiment of the present application, the electrical connection relationship between the connector J1 and the surrounding components is described as follows:

[0056] Pins 1, 7, 13, 19, 20, 22, 25, 31 and 38 of connector J1 are connected to DGND respectively. Pins 2 and 4 of connector J1 are connected to VCC respectively. Pins 3, 5 and 9 of connector J1 are connected to pins 25, 23 and 21 of FPC connector 6 respectively, and pin 8 of connector J1 is connected to DOVDD. Pins 10 and 12 of connector J1 are connected to DVDD. Pins 11, 15 and 17 of connector J1 are connected to pins 28, 26 and 24 of FPC connector 6 respectively. Pin 14 of connector J1 is connected to AFVDD; pins 16 and 18 of connector J1 are connected to AVDD. Pins 21, 23 and 27 of connector J1 are connected to pins 17, 15 and 13 of FPC connector 6 respectively. Pin 29 of connector J1 is connected to pin 11 of FPC connector 6. Pin 34 of connector J1 is connected to pin 14 of FPC connector 6. Pin 35 of connector J1 is connected to pin 16 of FPC connector 6. Pin 40 of connector J1 is connected to pin 20 of FPC connector 6.

[0057] like Figure 6 As shown, in the embodiment of the present application, the main function of the connector J1 is to realize signal transmission between the counting delay module 1, the ADC conversion module 2 and the test main control box 3.

[0058] like Figure 6 As shown, in the embodiment of the present application, the electrical connection relationship between the FPC connector 6 and the surrounding components is introduced as follows:

[0059] Pins 1 and 3 of FPC connector 6 are connected to DVDD. Pins 2, 33, and 34 of FPC connector 6 are connected to AFVDD.

[0060] Pin 5 of FPC connector 6 is connected to pin 39 of connector J1. Pin 7 of FPC connector 6 is connected to pin 37 of connector J1. Pins 4, 9, 18, 19, 22, 27, 29, 30, G1-A, G1-B, G2-A and G2-B of FPC connector 6 are all connected to DGND. Pin 31 of FPC connector 6 is connected to AVDD; Pin 32 of FPC connector 6 is connected to DOVDD.

[0061] like Figure 6 As shown, in the embodiment of the present application, the function of the FPC connector 6 is mainly to connect the camera module 8, the conductive silver glue 85 and the integrated communication module 5 for data transmission and power supply.

[0062] like Figure 6 As shown, in the embodiment of the present application, the steps of using the above-mentioned conductive silver glue intelligent activation and testing system to perform testing are as follows:

[0063] The first step is to start the test main control box 3;

[0064] The second step is to start the counting delay module 1;

[0065] In the third step, the integrated communication module 5 supplies power to the conductive silver glue 85 through the first ejector pin 11 and the second ejector pin 12;

[0066] Step 4: After supplying power for 3 to 5 seconds, turn off the counting delay module 1;

[0067] The fifth step is to read the voltage Y of the conductive silver paste 85 and the voltage DOVDD across the voltage-dividing resistor R1, divide the voltages using Ohm's law, and then measure the divided voltages to calculate the resistance value of the conductive silver paste 85.

[0068] In the sixth step, the host 4 determines whether the resistance value of the conductive silver paste 85 is less than the preset resistance threshold (5Ω). If so, it is considered qualified and the camera module 8 outputs an image. If not, it is considered unqualified and the test is terminated.

[0069] It should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various utility model aspects, in the above description of the exemplary embodiments of the utility model, the various features of the utility model are sometimes grouped together into a single embodiment, figure, or description thereof. However, the disclosed method should not be interpreted as reflecting the following intention: the claimed utility model requires more features than the features explicitly stated in each claim. More specifically, as reflected in the following claims, the utility model aspects are less than all the features of the single embodiment disclosed above. Therefore, the claims following the specific embodiment are hereby expressly incorporated into the specific embodiment, wherein each claim itself serves as a separate embodiment of the utility model.

[0070] In addition, those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and to form different embodiments. It should be noted that the above embodiments illustrate the present invention rather than limit it, and that those skilled in the art may design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets should not be constructed as a limitation to the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention may be implemented by means of hardware including several different elements and by means of a suitably programmed computer. In a unit claim that lists several devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words may be interpreted as names.

Claims

1. An intelligent activation and testing system for conductive silver glue, wherein: The conductive silver glue (85) is connected between the metal bracket (86) and the shell of the voice coil motor (81); the metal bracket (86), the conductive silver glue (85) and the shell of the voice coil motor (81) form a conductive path, characterized in that it includes a first ejector pin (11), a second ejector pin (12), a counting delay module (1), an ADC conversion module (2), a test main control box (3) and an integrated communication module (5); The test main control box (3) is connected to the first ejector pin (11) and the second ejector pin (12) respectively through the integrated communication module (5), wherein the first ejector pin (11) is used to achieve electrical connection with the metal bracket (86); the second ejector pin (12) is used to achieve electrical connection with the housing of the voice coil motor (81); the integrated communication module (5) energizes the conductive silver glue (85) through the first ejector pin (11) and the second ejector pin (12); The ADC conversion module (2) is used to calculate the resistance value of the conductive silver glue (85), and the ADC conversion module (2) is connected to the integrated communication module (5); The counting delay module (1) is used to control the power-on time of the conductive silver glue (85), and the counting delay module (1) is connected to the integrated communication module (5).

2. The conductive silver paste intelligent activation and testing system according to claim 1, characterized in that: It also includes a host (4) for judging whether the resistance value of the conductive silver glue (85) meets a preset requirement, and the host (4) is connected to the test main control box (3).

3. The conductive silver paste intelligent activation and testing system according to claim 1, characterized in that: It also includes a display module (7) for displaying test results, and the display module (7) is connected to the host (4).

4. The conductive silver paste intelligent activation and testing system according to claim 1, characterized in that: The counting delay module (1) comprises a counting delay chip U2, and the integrated communication module (5) comprises a connector J1, and the connection relationship thereof is as follows: Pin 3 of the counting delay chip U2 is connected to pin 8 of the connector J1; Pins 7 and 8 of the counting delay chip U2 are both connected to the power supply.

5. The conductive silver paste intelligent activation and testing system according to claim 4, characterized in that: The ADC conversion module (2) comprises an ADC conversion chip U1, and the connection relationship thereof is as follows: Pin 3 of the ADC conversion chip U1 is connected to DGND; Pin 4 of the ADC conversion chip U1 is connected to pin 39 of the connector J1; Pin 5 of the ADC conversion chip U1 is connected to pin 37 of the connector J1; Pin 6 of the ADC conversion chip U1 is connected to DOVDD; Pins 7 and 8 of the ADC conversion chip U1 are connected to VCC respectively.

6. The conductive silver paste intelligent activation and testing system according to any one of claims 2 to 5, characterized in that: It also includes a voltage divider resistor R1, one end of the voltage divider resistor R1 is connected to pin 6 of the ADC conversion chip U1, the other end of the voltage divider resistor R1 is connected to pin 3 of the ADC conversion chip U1 via a conductive silver glue (85), and the connection point between the voltage divider resistor R1 and the conductive silver glue (85) is connected to a test main control box (3).

7. The conductive silver paste intelligent activation and testing system according to claim 4, characterized in that: It also includes a Type-C interface (9), wherein pin 1 of the Type-C interface (9) is connected to pin 9 of the counting delay chip U2, and pins 3 and 4 of the Type-C interface (9) are both connected to a power source.

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