Display module capable of detecting grounding conductivity of high-resistance film

Abstract

The embodiment of the utility model provides a display module capable of detecting grounding conductivity of a high-resistance film. The display module comprises an Incell TFT (Thin Film Transistor) display screen, an FPC (Flexible Printed Circuit) and conductive cloth, the whole upper surface of the CF glass of the Incell TFT display screen is covered with a layer of high-resistance film; a first silver paste point and a second silver paste point are arranged on lower substrate glass of the Incell TFT display screen; the FPC flexible circuit board comprises a first copper leakage area and a second copper leakage area. And the conductive cloth covers the high-resistance film, the first silver paste point, the second silver paste point, the first copper leakage region and the second copper leakage region at the same time, so that whether the conductive cloth has conductive performance or not is judged by testing the loop resistance between the first copper leakage region and the second copper leakage region. Through the above arrangement, whether the conductive cloth has conductive performance can be judged by testing the loop resistance between the first copper leakage area and the second copper leakage area, the detection efficiency is improved, and defective products are prevented from flowing out.

Description

Technical Field

[0001] The utility model relates to the field of display screens, in particular to a display module capable of detecting the grounding conductivity of a high-resistance film. Background Art

[0002] For the LCD display module of the incell solution, a high-resistance film needs to be made on the upper surface of the panel's upper glass color filter CF, which can 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 conductive material and then connected to the GND pin of the FPC. The existing connection method is to directly connect the high-resistance film and the GND pin of the FPC through conductive cloth, but if the conductive cloth is not conductive, it will not play the role of electrostatic protection and is prone to production accidents. Therefore, it is necessary to test the conductivity of the conductive cloth to ensure that the conductive performance of the conductive cloth is good. Utility Model Content

[0003] The purpose of the utility model is to solve the shortcomings in the prior art and to propose a display module capable of detecting the grounding conductivity of a high-resistance film.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The embodiment of the utility model provides a display module capable of detecting the grounding conductivity of a high-resistance film, comprising: an Incell TFT display screen, an FPC flexible circuit board and a conductive fabric;

[0006] The entire upper surface of the CF glass of the Incell TFT display is covered with a high-resistance film;

[0007] A first silver paste dot and a second silver paste dot are provided on the lower substrate glass of the Incell TFT display;

[0008] The FPC flexible circuit board includes a first copper leakage area and a second copper leakage area;

[0009] The conductive cloth covers the high-resistance film, the first silver paste dot, the second silver paste dot, the first copper leakage area and the second copper leakage area at the same time, so as to determine whether the conductive cloth has conductive properties by testing the loop resistance between the first copper leakage area and the second copper leakage area.

[0010] In a preferred embodiment of the present invention, the basic stacking structure of the Incell TFT display screen is, from top to bottom, an upper polarizer, a high-resistance film, CF glass, a lower substrate glass and a lower polarizer.

[0011] In a preferred embodiment of the present invention, the size of the upper polarizer is smaller than the size of the high-resistance film.

[0012] In a preferred embodiment of the present invention, the size of the CF glass is smaller than the size of the lower substrate glass;

[0013] The first silver paste dots and the second silver paste dots are disposed on a portion of the lower substrate glass that exceeds the CF glass.

[0014] In a preferred embodiment of the present invention, the FPC flexible circuit board further includes a first gold finger connected to the lower substrate glass.

[0015] In a preferred embodiment of the present invention, the FPC flexible circuit board further includes a second gold finger, and the second gold finger is connected to the client.

[0016] In a preferred embodiment of the present invention, the impedance of the high-resistance film is between 10^7-10^9 ohm.

[0017] In a preferred embodiment of the present invention, the first copper leakage area is externally connected to a GND terminal of a test circuit board.

[0018] In a preferred embodiment of the present invention, the second copper leakage area is externally connected to the AG-GND terminal of the test circuit board.

[0019] In a preferred embodiment of the present invention, an LED lamp or a buzzer is connected in series between the GND terminal and the AG-GND terminal of the test circuit board.

[0020] Compared with the prior art, the advantages and positive effects of the utility model are:

[0021] In the utility model, through the above-mentioned arrangement, the conductive cloth simultaneously covers the high-resistance film, the first silver paste dot, the second silver paste dot, the first copper leakage area and the second copper leakage area, so that it is possible to determine whether the conductive cloth has conductive properties by testing the loop resistance between the first copper leakage area and the second copper leakage area. For example, by using an external test circuit board, it is possible to determine whether the conductive cloth has conductive properties by testing the switch of an LED light or a buzzer in the circuit board. If the conductive properties of the conductive cloth are normal, the circuit is normally connected, and the test circuit board will have resistance display, LED light or buzzer sound, etc. Otherwise, the conductive cloth does not have conductive properties and needs to be replaced, thereby improving detection efficiency and preventing defective products from flowing out. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a display module capable of detecting the grounding conductivity of a high-resistance film provided by the utility model;

[0023] Figure 2 A schematic diagram of the structure of a display module capable of detecting the grounding conductivity of a high-resistance film provided by the utility model;

[0024] Figure 3 This is a schematic diagram of the stacking structure of the Incell TFT display screen provided by the utility model. DETAILED DESCRIPTION

[0025] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0027] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] The English abbreviations or phrases used in this utility model have the following Chinese meanings:

[0030] TFT is the abbreviation of Thin Film Transistor, which means thin film transistor in Chinese.

[0031] Incell: refers to the method of embedding the touch panel function into the liquid crystal pixel, that is, the touch sensor function needs to be embedded inside the pixel on the TFT array substrate.

[0032] Incell TFT: refers to a thin-film transistor liquid crystal display that uses Incell technology.

[0033] CF: Color Filter, in Chinese it means: color filter.

[0034] CF glass: refers to a glass substrate with a color filter.

[0035] FPC: Flexible Printed Circuit Board, in Chinese it means: flexible circuit board.

[0036] See also Figure 1-3 , the utility model embodiment provides a technical solution:

[0037] The display module capable of detecting the grounding conductivity of a high-resistance film provided by the embodiment of the utility model comprises: an Incell TFT display screen 100, an FPC flexible circuit board 200 and a conductive cloth 300;

[0038] The entire upper surface of the CF glass 130 of the Incell TFT display screen 100 is covered with a high resistance film 140;

[0039] The lower substrate glass 120 of the Incell TFT display screen 100 is provided with a first silver paste dot 160 and a second silver paste dot 170;

[0040] The FPC flexible circuit board 200 includes a first copper leakage area 210 and a second copper leakage area 220;

[0041] The conductive cloth 300 simultaneously covers the high-resistance film 140, the first silver paste dot 160, the second silver paste dot 170, the first copper leakage area 210 and the second copper leakage area 220, so as to determine whether the conductive cloth 300 has conductive properties by testing the loop resistance between the first copper leakage area 210 and the second copper leakage area 220.

[0042] In the utility model, through the above-mentioned arrangement, the conductive cloth simultaneously covers the high-resistance film, the first silver paste dot, the second silver paste dot, the first copper leakage area and the second copper leakage area, so that it is possible to determine whether the conductive cloth has conductive properties by testing the loop resistance between the first copper leakage area and the second copper leakage area. For example, by using an external test circuit board, it is possible to determine whether the conductive cloth has conductive properties by testing the switch of an LED light or a buzzer in the circuit board. If the conductive properties of the conductive cloth are normal, the circuit is normally connected, and the test circuit board will have resistance display, LED light or buzzer sound, etc. Otherwise, the conductive cloth does not have conductive properties and needs to be replaced, thereby improving detection efficiency and preventing defective products from flowing out.

[0043] In a preferred embodiment of the present invention, reference Figure 3The basic stacking structure of the Incell TFT display screen is, from top to bottom, an upper polarizer 150 , a high resistance film 140 , a CF glass 130 , a lower substrate glass 120 and a lower polarizer 110 .

[0044] In a preferred embodiment of the present invention, reference Figure 1-3 , the size of the upper polarizer 150 is smaller than the size of the high resistance film 140. Thus, the high resistance film 140 exceeds a portion of the upper polarizer 150, and the exceeding portion is convenient for contacting with the conductive cloth 300.

[0045] In a preferred embodiment of the present invention, the size of the CF glass 130 is smaller than the size of the lower substrate glass 120;

[0046] The first silver paste dots 160 and the second silver paste dots 170 are disposed on a portion of the lower substrate glass 120 that extends beyond the CF glass 130 .

[0047] The above configuration enables the high resistance film 140 to be connected and conducted with the first silver paste dot 160 , the second silver paste dot 170 , the first copper leakage area 210 and the second copper leakage area 220 through the covering conductive cloth 300 .

[0048] In a preferred embodiment of the present invention, the FPC flexible circuit board 200 further includes a first gold finger 230 , and the first gold finger 230 is connected to the lower substrate glass 120 .

[0049] In a preferred embodiment of the present invention, the FPC flexible circuit board 200 further includes a second gold finger 240, and the second gold finger 240 is connected to the client.

[0050] In a preferred embodiment of the present invention, the impedance of the high resistance film 140 is between 10^7-10^9 ohm. The above configuration can timely conduct away the ESD static electricity acting on the display module, thus playing a role of static electricity protection.

[0051] In a preferred embodiment of the present invention, the first copper leakage area 210 is externally connected to the GND terminal of the test circuit board 400 .

[0052] In a preferred embodiment of the present invention, the second copper leakage area 220 is externally connected to the AG-GND terminal of the test circuit board 400 .

[0053] Wherein, the test circuit board can be a digital-to-analog converter or a multimeter, and the resistance between two points is measured to determine whether the conductive cloth 300 is conductive. When the conductive cloth 300 is conductive and the circuit is connected, a resistance value can be measured in the circuit. Otherwise, the resistance value will be infinite when the circuit is disconnected. Taking the case where the test circuit board is a multimeter as an example, the GND end is a red test lead, and the AG-GND end is a black test lead. The red test lead is connected to the first copper leakage area, and the black test lead is connected to the second copper leakage area. By detecting the resistance in the closed detection loop, it is determined whether the conductive cloth 300 is conductive.

[0054] In a preferred embodiment of the utility model, an LED lamp or a buzzer is connected in series between the GND terminal and the AG-GND terminal of the test circuit board 400. If the conductive performance of the conductive cloth is normal, the circuit is normally connected, so that the LED lamp in the test circuit board emits light or the buzzer emits a buzzer, otherwise, the conductive cloth does not have conductive performance and needs to be replaced, thereby improving the detection efficiency and preventing the outflow of defective products.

[0055] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A display module capable of detecting the grounding conductivity of a high-resistance film, characterized in that: include: IncellTFT display screen, FPC flexible circuit board and conductive fabric; The entire upper surface of the CF glass of the Incell TFT display is covered with a high-resistance film; A first silver paste dot and a second silver paste dot are provided on the lower substrate glass of the Incell TFT display screen; The FPC flexible circuit board includes a first copper leakage area and a second copper leakage area; The conductive cloth simultaneously covers the high-resistance film, the first silver paste dot, the second silver paste dot, the first copper leakage area and the second copper leakage area, so as to determine whether the conductive cloth has conductive properties by testing the loop resistance between the first copper leakage area and the second copper leakage area.

2. The display module capable of detecting the grounding conductivity of a high-resistance film according to claim 1, characterized in that: The basic stacking structure of the Incell TFT display screen is, from top to bottom, an upper polarizer, a high-resistance film, CF glass, a lower substrate glass and a lower polarizer.

3. The display module capable of detecting the grounding conductivity of a high-resistance film according to claim 2, characterized in that: The size of the upper polarizer is smaller than that of the high-resistance film.

4. The display module capable of detecting the grounding conductivity of a high-resistance film according to claim 2, characterized in that: The size of the CF glass is smaller than that of the lower substrate glass; The first silver paste dots and the second silver paste dots are disposed on a portion of the lower substrate glass that exceeds the CF glass.

5. The display module capable of detecting the grounding conductivity of a high-resistance film according to claim 1, characterized in that: The FPC flexible circuit board also includes a first gold finger, which is connected to the lower substrate glass.

6. The display module capable of detecting the grounding conductivity of a high-resistance film according to claim 5, characterized in that: The FPC flexible circuit board also includes a second gold finger, and the second gold finger is connected to the client.

7. The display module capable of detecting the grounding conductivity of a high-resistance film according to claim 1, characterized in that: The impedance of the high resistance film is between 10^7-10^9 ohm.

8. The display module capable of detecting the grounding conductivity of a high-resistance film according to claim 1, characterized in that: The first copper leakage area is externally connected to a GND terminal of a test circuit board.

9. The display module capable of detecting the grounding conductivity of a high-resistance film according to claim 8, characterized in that: The second copper leakage area is externally connected to the AG-GND terminal of the test circuit board.

10. The display module capable of detecting the grounding conductivity of a high-resistance film according to claim 9, characterized in that: An LED lamp or a buzzer is connected in series between the GND terminal and the AG-GND terminal of the test circuit board.

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