An airbag electrical testing fixture

Abstract

The utility model provides an electrical testing fixture, which is provided with an ITO film area and a TP clamping area to position the ITO film and TP, simulates the actual TP and TFT lamination state for testing, ensures that it is conducive to evaluating key performances such as display effect and touch accuracy, reduces the dependence on the actual TFT and TP, and ensures the accuracy of the electrical testing result because it can provide stable current transmission; through the design of the airbag on the bottom airbag layer, the ITP film is lifted up to fit with the TP during testing, and the softness of the airbag can provide buffering and protection for the ITO film, avoiding damage caused by mechanical force or impact during the lamination or testing process, and by adjusting the air pressure in the airbag, the pressure applied to the ITO film can be accurately controlled, and combined with the silk screen supporting the ITO film, the pressure can be evenly applied to the ITO film, thereby improving the lamination quality.

Description

Technical Field

[0001] The utility model relates to an electric measuring fixture, in particular to an air bag electric measuring fixture. Background Art

[0002] At present, a single TP has its own test standard. After the TFT segment is bonded to TFT, it is necessary to provide the test standard after bonding to TFT. Too many standards will lead to the inability to completely match the standards, resulting in misjudgment in the test. The precise alignment and fixation of TP and TFT is the basis and guarantee of unified electrical measurement standards. If real TFT and TP are used for bonding testing, it is easy to cause material waste and loss during the testing process. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide an electrical testing fixture, using an ITO film to replace TFT, using an air bag to lift the film to fully contact with TP, because the dielectric constant of the ITO film is close to that of TFT, the single TP can also complete the functional test based on the bonding state with the TFT, thereby unifying the electrical testing standards and reducing the dependence on the real TFT.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] An airbag electrical measurement fixture comprises a fixture body, a pressure plate, an airbag switch, and a bottom airbag layer, a screen area, an ITO film area, and a TP clamping area in the inner cavity of the body from bottom to top. The screen area is arranged on the bottom airbag layer and connected to both sides of the fixture body to support an ITO film placed in the ITO film area. The TP clamping area is arranged on the ITO film area. The TP clamping area is provided with a movable clamping column frame and a gold finger area. When the pressure plate applies a predetermined pressure, the movable clamping column shrinks downward so that the TP contacts the ITO film. At the same time, the airbag switch inflates the airbag of the bottom airbag layer. The airbag of the bottom airbag layer lifts up the ITO film to fully contact the TP. The FPC gold finger bound to the TP contacts the pressing component connected to the pressure plate upward and contacts the gold finger area downward.

[0006] The positions of the ITO film and the screen area are fixed. The screen area holds the ITO film. After the TP is placed in, the pressure plate is covered to press down the TP. The movable locking column is in a raised state to play a locking role when there is no external force pressing on it. When external force is applied, the movable locking column will shrink, and at the same time, the airbag will be activated to lift the ITO film to fully contact the TP to simulate the fitting state. After pressing down, the FPC gold finger is in full contact with the gold finger area to complete the test.

[0007] Furthermore, the pressing plate adopts a flip-cover design, which enables the pressing plate to be easily opened and closed, thereby conveniently placing the ITO film and the TP in the correct position. The surface of the pressing plate is hollowed out, and the hollowed-out area is larger than the TP viewing area and smaller than the TP peripheral area. The hollowed-out area is smaller than the TP peripheral area, thereby avoiding direct pressure on the TP peripheral area and reducing the potential risk of damage to the TP. The hollowed-out area is larger than the TP viewing area, thereby ensuring that the viewing area of ​​the TP (i.e., the touch area actually operated by the user) will not be directly covered or pressed by the pressing plate during the test, thereby ensuring the integrity of the TP viewing area and the accuracy of the test results.

[0008] Furthermore, the wire mesh area is constructed using a metal plate or a plastic plate with tiny holes, allowing gas to pass through and providing uniform pressure distribution.

[0009] Furthermore, the airbag switch is arranged on the pressure plate or the fixture body, and the airbag switch is integrated with a pressure sensor and a controller, which can monitor the pressure in the airbag in real time and automatically control the switch of the air source according to a preset pressure value.

[0010] Furthermore, the gold finger area adopts a probe structure, and preferably, the probe of the probe adopts a spring needle as the probe.

[0011] Furthermore, the movable locking column is provided with a device for detecting and regulating the flatness of the circumference of the movable locking column.

[0012] Preferably, the movable locking column adopts a telescopic structure.

[0013] Furthermore, a TP avoidance position is provided in the middle of one side of the clamp body, and an FPC avoidance position is also provided on the clamp body, and the position of the FPC avoidance position is set according to the position of the FPC.

[0014] The airbag electrical testing fixture of the utility model adopts the ITO film to replace TFT for electrical testing through the setting of the ITO film area, and its high transmittance ensures that the simulated test is close to the real TP and TFT bonding state in optical performance, which is beneficial to evaluate key performances such as display effect and touch accuracy, and reduces dependence on real TFT and TP. Because of its high conductivity, it can provide stable current transmission to ensure the accuracy of electrical testing results. The ITO film can also be customized according to specific test requirements, including parameters such as size, shape and thickness to adapt to different TP and TFT bonding scenarios; through the design of the bottom airbag, the softness of the airbag can provide buffering and protection for the ITO film to avoid damage caused by mechanical force or impact during bonding or testing, and by adjusting the air pressure in the airbag, the pressure applied to the ITO film can be accurately controlled. Combined with the screen, it can evenly apply pressure to the ITO film to improve the bonding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a top view of the airbag electrical test fixture;

[0017] Figure 2 This is the side view of the airbag electrical test fixture after assembly;

[0018] Figure 3 This is a top view of the assembled airbag electrical testing fixture. DETAILED DESCRIPTION

[0019] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the relevant drawings. The drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.

[0020] It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to another element or there may be a central element. The terms "upper", "lower" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0022] See also Figure 1 , Figure 2The utility model is an embodiment of an airbag electrical testing fixture, comprising a fixture body 1, a pressing plate 3, an airbag switch and a bottom airbag layer 21, a screen area 22, an ITO film area 23, and a TP clamping area 24 from bottom to top in the inner cavity of the body. The screen area 22 is arranged on the bottom airbag layer 21 and connected to both sides of the fixture body 1 to support the ITO film placed in the ITO film area 23. The TP clamping area 24 is arranged on the ITO film area 23. The TP clamping area 24 is provided with a movable clamping column frame and a gold finger area 241. When the pressing plate 3 applies a predetermined pressure, the movable clamping column shrinks downward so that the TP contacts the ITO film. At the same time, the airbag switch inflates the airbag 211 of the bottom airbag layer 21. The airbag 211 of the bottom airbag layer 21 lifts the ITO film to fully contact the TP. The FPC gold finger bound to the TP contacts the pressing component 31 connected to the pressing plate 3 upward and fully contacts the gold finger area 241 downward.

[0023] The assembly principle of this embodiment is: an ITO film customized according to specific test requirements such as size, shape and thickness is placed in the ITO film area 23 on the fixture screen area 22. The screen positions of the ITO film and the screen area 22 are fixed. The screen area 22 holds the ITO film, and then the TP bound with the FPC is placed in the TP clamping area 24, and then the cover pressure plate 3 is covered to press down the TP. The movable clamping column shrinks during the pressing process, and the FPC gold finger is fully in contact with the gold finger area 241. At the same time, the airbag switch is started to inflate the airbag 211 of the bottom airbag area 21, and the ITO film is lifted up to fully contact with the TP to simulate the fitting state, and the test is completed.

[0024] In this way, this implementation method can use ITO film instead of TFT for electrical testing. Its high transmittance ensures that the simulated test is close to the actual TP and TFT bonding state in optical performance, which is conducive to evaluating key performance such as display effect and touch accuracy, reducing dependence on real TFT and TP. Due to its high conductivity, it can provide stable current transmission and ensure the accuracy of electrical test results.

[0025] See also Figure 3 In another embodiment, the pressing plate 3 adopts a flip-cover design, which enables the pressing plate 3 to be easily opened and closed, so that the ITO film and TP can be conveniently placed in the correct position. The surface of the pressing plate 3 is hollowed out, and the hollowed-out area is larger than the TP viewing area and smaller than the TP peripheral area. The hollowed-out area is smaller than the TP peripheral area, which avoids direct pressure on the TP peripheral area and reduces the potential risk of damage to the TP. The hollowed-out area is larger than the TP viewing area, which ensures that the viewing area of ​​the TP (i.e., the touch area actually operated by the user) will not be directly covered or pressed by the pressing plate during the test, thereby ensuring that the TP viewing area is intact and the accuracy of the test results.

[0026] In this embodiment, the screen area 22 is constructed of a metal plate or a plastic plate with tiny holes, allowing gas to pass through and providing uniform pressure distribution, preventing the airbag 211 from directly contacting the ITO film, avoiding test errors caused by excessive or insufficient local pressure and damage or performance degradation caused by friction or contamination due to uneven pressure on the ITO film.

[0027] In this embodiment, the airbag switch is arranged on the pressure plate 3 or the fixture body 1. The airbag switch is integrated with a pressure sensor and a controller, which can monitor the pressure in the airbag 211 in real time and automatically control the switch of the air source according to a preset pressure value, thereby realizing inflation setting with high accuracy and stability.

[0028] It should be noted that, if the clamp is provided with a control panel, the airbag switch can also be arranged on the control panel of the clamp, and the predetermined pressure and the real-time pressure in the airbag 211 can be displayed on the control panel.

[0029] In this embodiment, the gold finger area 241 adopts a probe structure. Preferably, the probe uses spring needles as probes. These spring needles have certain elasticity and guidance, and can automatically align and contact the gold fingers on the FPC. When the clamp is closed, the spring needles will automatically compress and fit tightly on the gold fingers to form a reliable electrical connection.

[0030] In this embodiment, the movable locking column is externally connected to the flatness detection and control device. Preferably, the movable locking column adopts a telescopic structure to ensure the flatness of the TP, so that during the test process, the TP and the ITO film can be fully fitted, ensuring the stability of the test process and no damage to the TP / ITO film.

[0031] In this embodiment, a TP avoidance position 51 is provided in the middle of one side of the clamp body 1, so that the TP can be easily taken and placed without damaging the TP; the clamp body 1 is also provided with an FPC avoidance position 52. By setting the FPC avoidance position 52, it is possible to avoid the clamp from causing unnecessary pressure or damage to the bent or folded part of the FPC, thereby ensuring that during the test process, the clamp will not interfere with or affect the normal operation of the TP / FPC, which helps to improve the accuracy and reliability of the test and ensure the accuracy of the test results. Since the designs and shapes of FPCs are different, by setting the FPC avoidance position 52, the clamp can better adapt to FPCs of different shapes and sizes, thereby improving the versatility and practicality of the clamp.

[0032] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An airbag electrical testing fixture, characterized in that: It includes a fixture body, a pressing plate, an airbag switch, and the bottom airbag layer, a screen area, an ITO film area, and a TP clamping area from bottom to top in the inner cavity of the body. The screen area is arranged on the bottom airbag layer to support the ITO film placed in the ITO film area. The TP clamping area is arranged on the ITO film area. The TP clamping area is provided with a movable clamping column frame and a gold finger area. When the pressing plate applies a predetermined pressure, the movable clamping column shrinks downward so that the TP contacts the ITO film. At the same time, the airbag switch inflates the airbag of the bottom airbag layer. The airbag of the bottom airbag layer lifts up the ITO film to fully contact the TP. The FPC gold finger bound to the TP contacts the pressing component connected to the pressing plate upward and contacts the gold finger area downward.

2. The airbag electrical testing fixture according to claim 1, characterized in that: The pressure plate adopts a flip cover design, and the surface is hollowed out, and the hollowed-out area is larger than the TP viewing area and smaller than the peripheral area.

3. The airbag electrical testing fixture according to claim 1, characterized in that: The wire mesh area is constructed by using a metal plate or a plastic plate with tiny holes.

4. The airbag electrical testing fixture according to claim 1, characterized in that: The airbag switch is arranged on the pressing plate or on the clamp body.

5. The airbag electrical testing fixture according to claim 1, characterized in that: The airbag switch is integrated with a pressure sensor and a controller.

6. The airbag electrical testing fixture according to claim 1, characterized in that: The gold finger area adopts a probe structure.

7. The airbag electrical testing fixture according to claim 1, characterized in that: The movable locking column circumscribed flatness detection and control device.

8. The airbag electrical testing fixture according to claim 1, characterized in that: The movable locking column adopts a telescopic structure.

9. The airbag electrical testing fixture according to claim 1, characterized in that: A TP avoidance position is provided in the middle of one side of the clamp body, and an FPC avoidance position is also provided in the clamp body, and the position of the FPC avoidance position is set according to the position of the FPC.

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