Device for detecting connection effect of touch screen conductive adhesive

Abstract

The utility model relates to a touch screen conductive adhesive connection effect detection device, which comprises a vacuum tank with an opening at one end, a cover body assembly, a support, a vacuum pump and a control panel, and a plurality of pairs of test connecting wires are arranged in the vacuum tank; the cover body assembly can be connected to an opening of the vacuum tank in a sealed mode, and the vacuum pump, the cover body assembly and the vacuum tank are all arranged on the support. The control panel is electrically connected with the test connecting line and the vacuum pump. According to the touch screen conductive adhesive connection effect detection device provided by the utility model, the touch screen assembly to be detected is put into the detection device capable of forming vacuum, and whether the connection effect of the touch screen conductive adhesive is qualified or not is determined by detecting the resistivity change of the touch screen assembly before and after the test, so that the efficiency is much higher than that of the traditional method; and the detection efficiency and the product research and development efficiency are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary equipment for touch screen production, and in particular to a device for detecting the connection effect of conductive adhesive for touch screens. Background Technology

[0002] The upper layer circuitry of a five-wire resistive touchscreen is connected to the lower layer circuitry via low-temperature conductive adhesive. The reliability of the low-temperature conductive adhesive connection is mainly affected by the medium being connected and the connection area.

[0003] Currently, the upper and lower circuit media connected by low-temperature conductive adhesive include silver wires and carbon wires. Therefore, there are generally two ways to connect the upper and lower circuits: upper circuit silver wire + low-temperature conductive adhesive + lower circuit silver wire, and upper circuit carbon wire + low-temperature conductive adhesive + lower circuit silver wire. However, the adhesion performance of silver wires and carbon wires to low-temperature conductive adhesives differs to some extent. The larger the designed area of ​​the conductive adhesive, the better the adhesion performance, and vice versa. However, due to product size limitations, the designed area of ​​the conductive adhesive cannot be increased indefinitely.

[0004] When developing new products, it is essential to verify the reliability of the conductive adhesive connections. The industry standard is to use high-temperature and high-humidity tests and thermal shock tests. However, this method has drawbacks: sample testing is time-consuming, typically requiring two weeks. Furthermore, frequent sample failures necessitate the re-creation and re-verification of samples, significantly extending the development cycle and leading to customer complaints. Utility Model Content

[0005] Therefore, it is necessary to provide a device for detecting the connection effect of conductive adhesive on a touch screen to address at least one of the problems mentioned above.

[0006] The present invention provides a device for testing the connection effect of conductive adhesive for touch screens, comprising a vacuum tank with one open end, a cover assembly, a bracket, a vacuum pump, and a control panel. The vacuum tank contains several pairs of test connection lines. The cover assembly is sealably connected to the opening of the vacuum tank. The vacuum pump, the cover assembly, and the vacuum tank are all mounted on the bracket. The control panel is electrically connected to the test connection lines and the vacuum pump, respectively.

[0007] In one embodiment, the vacuum chamber is placed horizontally on the support, and one end of the test connection line is suspended inside the vacuum chamber.

[0008] In one embodiment, the cover assembly includes a cover, a connecting seat, and a support arm. The connecting seat is disposed on the bracket, a first end of the support arm is hinged to the connecting seat, and a second end of the support arm is connected to the cover.

[0009] In one embodiment, the opening of the vacuum tank is provided with a locking structure that matches the outer periphery of the cover, and a rotating handle is provided on the central axis of the cover, the rotating handle being pivotally connected to the second end of the support arm.

[0010] In one embodiment, the control panel is positioned above the vacuum tank.

[0011] In one embodiment, the control panel includes a resistance detection module electrically connected to the test connection line.

[0012] The technical solutions provided in the embodiments of this utility model bring the following beneficial technical effects:

[0013] The touch screen conductive adhesive connection effect testing device provided by this utility model is to place the touch screen component to be tested into a testing device that can form a vacuum, and determine whether the connection effect of the touch screen conductive adhesive is qualified by detecting the change in resistivity of the touch screen component before and after the test. The efficiency is much higher than that of traditional methods, which greatly improves the testing efficiency and product development efficiency.

[0014] Additional aspects and advantages of this application will be set forth in the following sections and will be understood in detail from the following description or by means of specific implementation of the present invention. Attached Figure Description

[0015] Figure 1 This is a first-view planar structural diagram of the touch screen conductive adhesive connection effect detection device in one embodiment of the present invention.

[0016] Figure 2 This is a first-view planar structural diagram of the touch screen conductive adhesive connection effect detection device in one embodiment of the present invention.

[0017] Figure 3 This is a flowchart illustrating a method for detecting the connection effect of conductive adhesive on a touchscreen in one embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures:

[0019] 100-Vacuum container, 200-Lid assembly, 300-Bracket, 400-Vacuum pump, 500-Control panel, 600-Test connection cable;

[0020] 210-Cover body, 220-Connecting seat, 230-Support arm, 211-Rotating handle. Detailed Implementation

[0021] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate possible embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein with reference to the drawings. The embodiments described with reference to the drawings are exemplary and intended to provide a more thorough and complete understanding of the disclosure of this utility model, and should not be construed as limiting the utility model. Furthermore, detailed descriptions of known technologies may be omitted where such details are not essential to the features of the illustrated utility model.

[0022] Those skilled in the art will understand that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the prior art and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0023] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in the specification of this application means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that the term “and / or” as used herein includes all or any units and all combinations of one or more associated listed items.

[0024] The technical solution of this utility model and how the technical solution solves the above-mentioned technical problems are described in detail below with specific embodiments.

[0025] An embodiment of the first aspect of this utility model provides a device for detecting the connection effect of conductive adhesive on a touch screen, such as... Figure 1 and Figure 2 As shown, the device includes a vacuum tank 100 with one open end, a cover assembly 200, a bracket 300, a vacuum pump 400, and a control panel 500. Several pairs of test connection wires 600 are provided inside the vacuum tank 100. The cover assembly 200 is sealably connected to the opening of the vacuum tank 100. The vacuum pump 400, the cover assembly 200, and the vacuum tank 100 are all mounted on the bracket 300. The control panel 500 is electrically connected to the test connection wires 600 and the vacuum pump 400, respectively.

[0026] The touchscreen conductive adhesive connection effect testing device provided by this utility model is mainly a vacuum device, specifically including a vacuum tank 100, a cover assembly 200, and a bracket 300. The cover assembly 200 can be sealed to the vacuum tank 100, allowing the opening into which the touchscreen assembly can be placed to be sealed or opened. Simultaneously, a test connection line 600 is installed on the body of the vacuum tank 100, realizing the circuit connection inside and outside the vacuum tank 100, enabling the testing of the electrical parameters of the touchscreen assembly under vacuum conditions. By detecting the changes in the electrical performance of the touchscreen assembly under normal pressure and vacuum conditions, the connection effect of the touchscreen conductive adhesive in the touchscreen assembly is determined to meet the requirements. This device can quickly test the connection effect, significantly improving the verification efficiency of the touchscreen assembly process.

[0027] Specifically, in some implementations of the first aspect of this utility model, such as Figure 2 As shown, the vacuum chamber 100 is placed horizontally on the support 300, and one end of the test connection cable 600 is suspended inside the vacuum chamber 100. Placing the vacuum chamber 100 horizontally allows for easy suspension of the test connection cable 600 within its interior, enabling the touchscreen components to be suspended during testing. Even with multiple touchscreen components being tested simultaneously, they can operate independently without interference. The touchscreen components do not contact the vacuum chamber 100, thus preventing electrical interference from the vacuum chamber 100. Alternatively, placing the vacuum chamber 100 vertically, with an insulated platform inside, and placing the touchscreen components to be tested on it, also ensures no interference.

[0028] Specifically, in conjunction with the embodiments of the first aspect and the above implementation methods, in other implementation methods, such as Figure 1 As shown, the cover assembly 200 includes a cover 210, a connecting seat 220 and a support arm 230. The connecting seat 220 is mounted on the bracket 300. The first end of the support arm 230 is hinged to the connecting seat 220, and the second end of the support arm 230 is connected to the cover 210.

[0029] Optionally, in conjunction with the embodiments of the first aspect and the above implementations, in some other implementations, such as Figure 2As shown, the opening of the vacuum container 100 is provided with a locking structure that matches the outer periphery of the cover 210. A rotating handle 211 is provided on the central axis of the cover 210, and the rotating handle 211 is pivotally connected to the second end of the support arm 230. With the locking structure at the opening of the vacuum container 100, when the cover 210 is rotated to a certain angle, it fits against the vacuum container 100; further rotation will lock it in place. To remove the cover 210, first rotate the cover 210 so that its edge disengages from the locking structure, and then remove the cover 210 along the axial direction of the vacuum container 100. Alternatively, the locking structure can be a threaded structure, with matching threads provided on the opening edge of the vacuum container 100 and the outer periphery of the cover 210.

[0030] Optionally, combining the first aspect and the above implementation methods, in some implementation methods of the first aspect, such as Figure 1 As shown, the control panel 500 is positioned above the vacuum tank 100. This placement of the control panel 500 allows operators to easily operate the vacuum pump 400, adjust the vacuum level and holding time within the vacuum tank 100, after the vacuum tank 100 has been shut down.

[0031] Based on the same technical concept, an embodiment of the second aspect of this utility model provides a method for detecting the connection effect of conductive adhesive on a touch screen, employing a device for detecting the connection effect of conductive adhesive on a touch screen as described in any of the claims of the first aspect of this utility model. Figure 3 As shown, it includes the following steps:

[0032] S100: Place the touch screen component under test into the vacuum chamber 100 through the opening of the vacuum chamber 100 and connect it to the test connection cable 600.

[0033] S200: Seal vacuum tank 100, start vacuum pump 400 to create and maintain a vacuum environment inside vacuum tank 100. Specifically, the vacuum environment is 0.6 MPa, and the maintenance time is 1 hour.

[0034] S300: The resistance change of the touchscreen component under test is detected by the test connection cable 600 to determine the connection effect of the conductive adhesive on the touchscreen. Specifically, this determination step includes: determining the resistance change of the touchscreen component under test; when the resistance change is less than or equal to 10%, the connection effect of the touchscreen component under test is qualified.

[0035] The present invention provides a device and method for testing the connection effect of conductive adhesive for touch screens. The device places the touch screen component to be tested into a testing device that can form a vacuum. By detecting the change in resistivity of the touch screen component before and after the test, the device determines whether the connection effect of the conductive adhesive is qualified. The efficiency is much higher than that of traditional methods, which greatly improves the testing efficiency and product development efficiency.

[0036] The following are specific examples:

[0037] See Figure 1 and Figure 2 The vacuum device includes a steel canister-shaped container, namely a vacuum canister 100, and a matching lid. The vacuum canister 100 has an opening surrounded by a sealing ring, facilitating the placement of test samples into the vacuum canister 100 by the operator. Above the opening is a rotatable door, connected to the vacuum canister 100 via a connector and a rotating shaft. The lid is generally larger than the opening, ensuring a seal by covering the opening and sealing ring of the vacuum canister 100 when closed. A rotating handle 211 is connected to the lid. Rotating the handle 211 engages the lid with a locking device connected to the canister body. To open the lid, rotating the handle in the opposite direction disengages the lid from the locking device.

[0038] The vacuum container 100 also has an opening for connecting a vacuum-drawing pipeline. The pipeline, with a sealing ring at the connection point, is sealed to the vacuum container 100. An explosion-proof connector is installed on the vacuum container 100, its outer shell being sealed to the vacuum container 100 (with a sealing ring). One end of the explosion-proof connector inside the container has a connecting wire, and the other end of the connecting wire is connected to an electrical connection clip for clamping the internal test sample. The external part of the connector has a connecting wire for connecting to external instruments; this explosion-proof connector is the test connection wire 600. To ensure the corrosion resistance of the vacuum container 100, the outer surface of the container is galvanized and coated with anti-corrosion paint.

[0039] The electrical control system consists of a control panel 500, control circuitry, vacuum tubing, and a vacuum pump 400. The control panel 500 operates the testing apparatus and includes operation buttons and vacuum and time control devices. The vacuum control device sets and displays the vacuum level within the container, while the time control device sets and displays the time to control the evacuation time. The control circuit enables the vacuum pump 400 to evacuate the vacuum container. One end of the vacuum tubing connects to the vacuum container, and the other end connects to the vacuum pump 400. The control panel 500 can also integrate testing devices, such as a resistance testing device or resistance detection module. By connecting the control panel 500 to the test connection line 600, the resistance of the touchscreen components can be tested using the resistance testing device or resistance detection module within the control panel 500.

[0040] Test method:

[0041] Prepare samples that have passed appearance and electrical performance inspections. Connect the FPC end of the product to the corresponding test connection clip 600. Place the product inside the vacuum container 100, and close and lock the cover 210. Connect the multimeter probes to the exposed connection wires of the explosion-proof connector and measure the resistance value R1 of the product.

[0042] Turn on the power of the vacuum equipment via the control panel 500, and set the vacuum level to 0.6 MPa and the test time to 1 hour.

[0043] When the equipment is started, the vacuum pump 400 begins to work, and the vacuum control device begins to detect the vacuum level inside the vacuum tank 100. When the vacuum level reaches the set value, the vacuum pump 400 stops working, and the time control device starts timing. When the timing reaches the set value, the resistive touch screen, because the two layers of circuits are bonded together by a ring-shaped double-sided adhesive, creates a large pressure difference between the sealed air between the two layers of circuits and the external space of the product. This causes a pulling force between the two layers of circuits that is trying to break free from the double-sided adhesive. After this pulling force is maintained for a period of time, the conductive adhesive in the double-sided adhesive will also be affected by this pulling force, and the degree of its impact directly reflects the reliability of the conductive adhesive connection.

[0044] Observe the resistance value (resistance value of the conductive adhesive circuit) R2 displayed on the multimeter. When the ratio (in percentage) of the absolute value obtained by R2-R1 to R1 is greater than 10%, it indicates that the conductive adhesive connection of the product has failed. When the ratio does not exceed 10%, it indicates that the conductive adhesive connection of the product is reliable.

[0045] Those skilled in the art will understand that the steps, measures, and solutions in the various operations, methods, and processes discussed in this application can be alternated, modified, combined, or deleted. Furthermore, other steps, measures, and solutions in the various operations, methods, and processes discussed in this application can also be alternated, modified, rearranged, decomposed, combined, or deleted. Furthermore, steps, measures, and solutions in the prior art that are similar to those disclosed in this application can also be alternated, modified, rearranged, decomposed, combined, or deleted.

[0046] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0047] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0049] It should be understood that although the steps in the flowcharts of the accompanying figures are shown sequentially as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the accompanying figures may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0050] The above description is only a partial embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A device for detecting the connection effect of conductive adhesive on a touch screen, characterized in that, The device includes a vacuum container with one open end, a cover assembly, a bracket, a vacuum pump, and a control panel. The vacuum container contains several pairs of test connection wires. The cover assembly is sealably connected to the opening of the vacuum container. The vacuum pump, the cover assembly, and the vacuum container are all mounted on the bracket. The control panel is electrically connected to the test connection wires and the vacuum pump, respectively.

2. The apparatus according to claim 1, wherein The vacuum chamber is placed horizontally on the support, and one end of the test connection line is suspended inside the vacuum chamber.

3. The apparatus according to claim 1, wherein The cover assembly includes a cover, a connecting seat, and a support arm. The connecting seat is disposed on the bracket, the first end of the support arm is hinged to the connecting seat, and the second end of the support arm is connected to the cover.

4. The apparatus according to claim 3, wherein The opening of the vacuum tank is provided with a locking structure that matches the outer periphery of the cover. A rotating handle is provided on the central axis of the cover, and the rotating handle is pivotally connected to the second end of the support arm.

5. The apparatus according to claim 1, wherein The control panel is located above the vacuum tank.

6. The apparatus according to claim 1, wherein The control panel includes a resistance detection module, which is electrically connected to the test connection line.

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