Display module capable of detecting grounding conductivity of high-resistance film and conductive cloth

Abstract

The utility model discloses a display module capable of detecting grounding conductivity of a high-resistance film and conductive cloth, which comprises a flexible printed circuit (FPC) board body and a display screen, an upper polaroid is arranged on the display screen, conductive cloth is arranged on the upper polaroid, the conductive cloth comprises an insulating layer, and the insulating layer is arranged on the upper polaroid. The upper surface of the insulation layer is provided with a first conductive layer and a second conductive layer, an isolation gap is arranged between the first conductive layer and the second conductive layer, the edge of the FPC board body is provided with a GND copper leakage part and an AGGND copper leakage part, the GND copper leakage part is electrically connected with the first conductive layer, and the AGGND copper leakage part is electrically connected with the AGGND copper leakage part. And the AGGND copper leakage part is electrically connected with the second conductive layer. During testing, the ADC sampling detection circuit directly detects the impedance (GND and AGGND) between the two PINs of the golden finger of the FPC board body, then the detection result is displayed and output on the detection module, the detection is rapid and convenient, and the phenomenon that the conductive cloth is not conductive due to the wrong type selection of the conductive cloth is thoroughly avoided.

Description

Technical Field

[0001] The utility model relates to a detection device for a display module, more specifically, to a display module capable of detecting the grounding conductivity of a high-resistance film and a conductive cloth. Background Art

[0002] In the liquid crystal display module, a high-resistance film needs to be made on the upper surface of the panel's upper glass color filter CF. The impedance range of the high-resistance film is generally 10^7 ~ 10^9ohm, which is used to promptly conduct away the ESD static electricity acting on the display module and play an electrostatic protection function. The high-resistance film on the upper glass color filter CF is connected to the lower array glass through a conductive material and then connected to the GND of the FPC. One of the connection methods is to directly connect the high-resistance film and the GND of the FPC through a conductive cloth, which requires a method to detect the conductivity of the conductive cloth, but there is no reliable detection device in the prior art.

[0003] Chinese invention patent document CN111239200A discloses a detection sheet for detecting polymer conductive film, including a copper-clad substrate, the copper-clad substrate includes a copper-clad rate test area; the copper-clad rate test area is provided with a copper-free area, the copper-free area is a substrate exposed area formed by etching on the copper-clad substrate; the copper-clad substrate also includes a resistance test area; the resistance test area is provided with a circuit and a pad, the circuit and pad are the copper-clad areas retained after etching of the copper-clad substrate. The copper-clad substrate also includes a backlight test area, and through holes are arranged at intervals in the backlight test area. The copper-clad substrate is provided with a downwardly concave V pit, and the V pit separates the copper-clad rate test area from the resistance test area. The copper-clad rate test area is also provided with a length scale for measuring the copper length and a scale scale for measuring the copper rate, and the length scale and the scale scale are arranged on both sides of the copper-free area; the upper and lower parts of the copper-free area are provided with clamping parts for clamping during electroplating. The circuit is a circular closed circuit; the pads are arranged inside and outside the circuit, and the distance between the pads and the circuit is 10mm. The diameter of the pad is 1mm, and the line width of the circuit is 1mm; the diameter of the through hole is 0.3mm. The length of the detection sheet for detecting the polymer conductive film is 1-500mm, and the width is 1-500mm; the width of the copper coating rate test area is 60mm; the detection sheet for detecting the polymer conductive film is a double-sided board with the same arrangement on both sides; the copper clad substrate is also provided with positioning holes.

[0004] Obviously, the detection sheet for detecting the polymer conductive film of the patent is provided with a length scale and a scale, and the copper length and copper rate after electroplating can be observed visually. However, this structure cannot solve the problem of detecting the conductivity of the existing conductive cloth. Utility Model Content

[0005] Based on this, it is necessary to provide a display module that can detect the grounding conductivity of high-resistance film and conductive cloth for the above technical problems. The display module that can detect the grounding conductivity of high-resistance film and conductive cloth includes an FPC board and a display screen. The display screen is provided with an upper polarizer, and the upper polarizer is provided with a conductive cloth. The conductive cloth includes an insulating layer, and the upper surface of the insulating layer is provided with a first conductive layer and a second conductive layer. An isolation gap is provided between the first conductive layer and the second conductive layer. The edge of the FPC board is provided with a GND copper leakage part and an AG_GND copper leakage part. The GND copper leakage part is electrically connected to the first conductive layer, and the AG_GND copper leakage part is electrically connected to the second conductive layer. During the test, the ADC sampling detection circuit directly measures the impedance (GND and AG_GND) between the two PIN pins of the gold finger of the FPC board, and then displays the output detection result on the detection module, which is quick and convenient, and completely avoids the phenomenon of non-conductivity of the conductive cloth caused by the wrong selection of the conductive cloth, and effectively improves the test efficiency of the grounding performance of the high-resistance film of the liquid crystal display module.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A display module capable of detecting the grounding conductivity of a high-resistance film and a conductive cloth, characterized in that the display module capable of detecting the grounding conductivity of a high-resistance film and a conductive cloth comprises an FPC board and a display screen, an upper polarizer is provided on the display screen, a conductive cloth is provided on the upper polarizer, the conductive cloth comprises an insulating layer, a first conductive layer and a second conductive layer are provided on the upper surface of the insulating layer, an isolation gap is provided between the first conductive layer and the second conductive layer, a GND copper leakage portion and an AG_GND copper leakage portion are provided at the edge of the FPC board, the GND copper leakage portion is electrically connected to the first conductive layer, and the AG_GND copper leakage portion is electrically connected to the second conductive layer.

[0008] As a preferred implementation of the display module capable of detecting the grounding conductivity of the high-resistance film and the conductive cloth provided by the utility model, the conductive cloth is in a U-shape.

[0009] As a preferred embodiment of the display module capable of detecting the grounding conductivity of the high-resistance film and the conductive cloth provided by the utility model, the insulating layer is a PET insulating film.

[0010] As a preferred implementation of the display module capable of detecting the grounding conductivity of the high-resistance film and the conductive cloth provided by the utility model, the conductive cloth is aligned with the edge of the upper polarizer and is pasted.

[0011] As a preferred embodiment of the display module capable of detecting the grounding conductivity of high-resistance film and conductive cloth provided by the utility model, the GND copper leakage part and the AG_GND copper leakage part are both electrically connected to the gold fingers of the FPC board.

[0012] As a preferred embodiment of the display module capable of detecting the grounding conductivity of high-resistance film and conductive cloth provided by the utility model, the GND copper leakage part and the AG_GND copper leakage part are electrically connected to the gold fingers of the FPC board through flying wires.

[0013] As a preferred implementation of the display module capable of detecting the grounding conductivity of the high-resistance film and the conductive cloth provided by the utility model, the size of the isolation gap is between 3 mm and 5 mm.

[0014] As a preferred implementation of the display module capable of detecting the grounding conductivity of the high-resistance film and the conductive cloth provided by the utility model, the size of the isolation gap is 4 mm.

[0015] As a preferred implementation of the display module capable of detecting the grounding conductivity of the high-resistance film and the conductive cloth provided by the utility model, the isolation gap is filled with an insulating block.

[0016] As a preferred implementation of the display module capable of detecting the grounding conductivity of the high-resistance film and the conductive cloth provided by the utility model, the resistivity of the insulating block is greater than that of the insulating layer.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The utility model provides a display module capable of detecting the grounding conductivity of a high-resistance film and a conductive cloth. During the test, an ADC sampling detection circuit directly measures the impedance (GND and AG_GND) between two PIN feet of the gold finger of an FPC board, and then displays the output detection result on the detection module. The utility model is quick and convenient, and the phenomenon of non-conductivity of the conductive cloth caused by incorrect selection of the conductive cloth is completely avoided, thereby effectively improving the test efficiency of the grounding performance of the high-resistance film of the liquid crystal display module.

[0019] In addition, the GND copper leakage part and the AG_GND copper leakage part can be electrically connected to the gold finger of the FPC board through the flying wire. By using the flying wire to electrically connect the GND copper leakage part and the AG_GND copper leakage part to the gold finger of the FPC board, fast operation can be achieved without redesigning the circuit structure, thus saving costs.

[0020] In addition, the isolation gap may be filled with an insulating block. The resistivity of the insulating block is greater than that of the insulating layer. By using the insulating block, the isolation resistance between the first conductive layer and the second conductive layer may be further increased, and the withstand voltage performance may be provided, thereby improving the reliability of the liquid crystal display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the scheme in the utility model, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of a display module capable of detecting the grounding conductivity of a high-resistance film and a conductive cloth according to the utility model;

[0023] Figure 2 This is a schematic structural diagram of the conductive cloth of the display module capable of detecting the grounding conductive performance of the high-resistance film and the conductive cloth of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the conductive cloth of the display module capable of detecting the high resistance film and the grounding conductive performance of the conductive cloth of the utility model, and this is another viewing angle;

[0025] Figure 4 for Figure 3 A detailed enlarged schematic diagram of area A of the structural schematic diagram of the conductive cloth of the display module capable of detecting the high-resistance film and the grounding conductive performance of the conductive cloth;

[0026] Figure 5 This is a schematic diagram of the structure of the conductive cloth of the display module capable of detecting the high resistance film and the grounding conductive performance of the conductive cloth of the utility model, which is another embodiment;

[0027] Figure 6 for Figure 5 A detailed enlarged schematic diagram of area B of the structural schematic diagram of the conductive cloth of the display module capable of detecting the high-resistance film and the grounding conductive performance of the conductive cloth;

[0028] The markings in the figure are as follows: 1. FPC board; 11. GND copper leakage part; 12. AG_GND copper leakage part; 2. Conductive cloth; 21. Insulation layer; 22. First conductive layer; 23. Second conductive layer; 24. Isolation gap; 25. Insulation block; 3. Display screen; 31. Upper polarizer. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0030] As described in the background technology, in the prior art, for a liquid crystal display module, a high-resistance film needs to be formed on the upper surface of the upper glass color filter CF of the panel. The impedance range of the high-resistance film is generally 10^7 ~ 10^9ohm, which is used to promptly conduct away the ESD static electricity acting on the display module and play an electrostatic protection function. The high-resistance film on the upper glass color filter CF is connected to the lower array glass through a conductive material and then connected to the GND of the FPC. One of the connection methods is to directly connect the high-resistance film and the GND of the FPC through a conductive cloth, which requires a method to detect the conductivity of the conductive cloth, but there is no reliable detection device in the prior art.

[0031] In order to solve this technical problem, the utility model provides a display module capable of detecting the grounding conductivity of a high-resistance film and a conductive cloth, comprising an FPC board 1 and a display screen 3, wherein an upper polarizer 31 is provided on the display screen 3, and a conductive cloth 2 is provided on the upper polarizer 31, and the conductive cloth 2 is aligned and pasted with the edge of the upper polarizer 31. The conductive cloth 2 comprises an insulating layer 21, and a first conductive layer 22 and a second conductive layer 23 are provided on the upper surface of the insulating layer 21, and an isolation gap 24 is provided between the first conductive layer 22 and the second conductive layer 23, and a GND copper leakage portion 11 and an AG_GND copper leakage portion 12 are provided at the edge of the FPC board 1, and the GND copper leakage portion 11 is electrically connected to the first conductive layer 22, and the AG_GND copper leakage portion 12 is electrically connected to the second conductive layer 23.

[0032] Through the above structural design, during the test, the ADC sampling detection circuit directly measures the impedance (GND and AG_GND) between the two PIN feet of the gold finger of the FPC board 1, and then displays the output detection result on the detection module, which is quick and convenient, and completely avoids the phenomenon of non-conductivity of the conductive cloth caused by incorrect selection of the conductive cloth, and effectively improves the test efficiency of the high-resistance film grounding performance of the liquid crystal display module.

[0033] In order to enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0036] like Figures 1 to 4 As shown, the display module capable of detecting the grounding conductivity of high-resistance film and conductive cloth comprises an FPC board 1 and a display screen 3, on which an upper polarizer 31 is provided, on which a conductive cloth 2 is provided, and the conductive cloth 2 is aligned and pasted to the edge of the upper polarizer 31.

[0037] The conductive cloth 2 includes an insulating layer 21, a first conductive layer 22 and a second conductive layer 23 are provided on the upper surface of the insulating layer 21, an isolation gap 24 is provided between the first conductive layer 22 and the second conductive layer 23, and a GND copper leakage portion 11 and an AG_GND copper leakage portion 12 are provided at the edge of the FPC board body 1, the GND copper leakage portion 11 is electrically connected to the first conductive layer 22, and the AG_GND copper leakage portion 12 is electrically connected to the second conductive layer 23.

[0038] It should be noted that the conductive fabric 2 is in a square shape. The insulating layer 21 is a PET insulating film.

[0039] In addition, the GND copper leakage portion 11 and the AG_GND copper leakage portion 12 are both electrically connected to the gold fingers of the FPC board 1 .

[0040] It should be noted that the size of the isolation gap 24 is between 3 mm and 5 mm. Preferably, the size of the isolation gap 24 is 4 mm.

[0041] The working mode of this embodiment is described below.

[0042] During the test, the ADC sampling detection circuit directly measures the impedance (GND and AG_GND) between the two PIN pins of the gold finger of the FPC board 1, and then displays the output test results on the detection module. This is quick and convenient, and completely avoids the phenomenon of non-conductivity of the conductive cloth caused by incorrect selection of the conductive cloth, effectively improving the test efficiency of the high-resistance film grounding performance of the LCD display module.

[0043] The display module capable of detecting the grounding conductivity of the high-resistance film and the conductive cloth provided in Example 1 is further optimized. Specifically, the GND copper leakage part 11 and the AG_GND copper leakage part 12 are electrically connected to the gold fingers of the FPC board 1 through flying wires.

[0044] The working mode of this embodiment is described below.

[0045] The GND copper leakage part 11 and the AG_GND copper leakage part 12 are electrically connected to the gold fingers of the FPC board body 1 by using flying wires, so that fast operation can be achieved without redesigning the circuit structure, thus saving costs.

[0046] like Figure 5 and Figure 6 As shown, the display module capable of detecting the grounding conductivity of the high-resistance film and the conductive cloth provided in Embodiment 1 or 2 is further optimized. Specifically, the isolation gap 24 is filled with an insulating block 25 .

[0047] It should be noted that the resistivity of the insulating block 25 is greater than that of the insulating layer 21 .

[0048] The working mode of this embodiment is described below.

[0049] By using the insulating block 25 , the isolation resistance between the first conductive layer 22 and the second conductive layer 23 can be further increased, and the withstand voltage performance can be provided, thereby improving the reliability of the liquid crystal display module.

[0050] The terms "coupling" and "coupling" involved in the embodiments of the present application should be understood in a broad sense. For example, they may refer to a direct physical connection, or an indirect connection achieved through electronic devices, such as a connection achieved through resistors, inductors, capacitors or other electronic devices.

[0051] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. A display module capable of detecting the grounding conductivity of a high-resistance film and a conductive cloth, characterized in that: The display module capable of detecting the grounding conductivity of a high-resistance film and a conductive cloth comprises an FPC board (1) and a display screen (3); an upper polarizer (31) is provided on the display screen (3); a conductive cloth (2) is provided on the upper polarizer (31); the conductive cloth (2) comprises an insulating layer (21); a first conductive layer (22) and a second conductive layer (23) are provided on the upper surface of the insulating layer (21); an isolation gap (24) is provided between the first conductive layer (22) and the second conductive layer (23); a GND copper leakage portion (11) and an AG_GND copper leakage portion (12) are provided at the edge of the FPC board (1); the GND copper leakage portion (11) is electrically connected to the first conductive layer (22); and the AG_GND copper leakage portion (12) is electrically connected to the second conductive layer (23).

2. The display module capable of detecting the grounding conductivity of high-resistance film and conductive cloth according to claim 1, characterized in that: The conductive cloth (2) is in the shape of a U.S. character.

3. The display module capable of detecting the grounding conductivity of high-resistance film and conductive cloth according to claim 1, characterized in that: The insulating layer (21) is a PET insulating film.

4. The display module capable of detecting the grounding conductivity of high-resistance film and conductive cloth according to claim 1, characterized in that: The conductive cloth (2) is aligned with the edge of the upper polarizer (31) and is bonded thereto.

5. The display module capable of detecting the grounding conductivity of high-resistance film and conductive cloth according to claim 1, characterized in that: The GND copper leakage part (11) and the AG_GND copper leakage part (12) are both electrically connected to the gold fingers of the FPC board (1).

6. The display module capable of detecting the grounding conductivity of high-resistance film and conductive cloth according to claim 5, characterized in that: The GND copper leakage part (11) and the AG_GND copper leakage part (12) are electrically connected to the gold fingers of the FPC board (1) via flying wires.

7. The display module capable of detecting the grounding conductivity of high-resistance film and conductive cloth according to claim 1, characterized in that: The size of the isolation gap (24) is between 3 mm and 5 mm.

8. The display module capable of detecting the grounding conductivity of high-resistance film and conductive cloth according to claim 7, characterized in that: The size of the isolation gap (24) is 4 mm.

9. The display module capable of detecting the grounding conductivity of high-resistance film and conductive cloth according to claim 1, characterized in that: The isolation gap (24) is filled with an insulating block (25).

10. The display module capable of detecting the grounding conductivity of high-resistance film and conductive cloth according to claim 9, characterized in that: The resistivity of the insulating block (25) is greater than that of the insulating layer (21).

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