Touch screen electrostatic protection structure and display device

Abstract

The utility model relates to electrostatic protection structure technical field especially relates to a touch -sensitive screen electrostatic protection structure and display equipment, touch -sensitive screen electrostatic protection structure includes first conductive part, first conductive part ground, and first conductive part includes main part cover section, with the ground copper area conductive connection of flexible circuit board of display module's copper leakage, and edge extension section is set up in the outside of the sensing line of display module, and the extension direction of edge extension section is same with the extension direction of sensing line, and the clearance is arranged between edge extension section and sensing line. The touch -sensitive screen electrostatic protection structure and display equipment can solve the problem that the existing touch -sensitive screen electrostatic protection structure is difficult to meet the electrostatic dredging demand of narrow frame touch -sensitive screen.

Description

Technical Field

[0001] This application relates to the field of electrostatic discharge protection structure technology, and in particular to an electrostatic discharge protection structure for a touch screen and a display device. Background Technology

[0002] Currently, electrostatic discharge (ESD) testing of laptop touchscreens before they leave the factory has become a mandatory quality inspection process in the industry. To ensure that laptop touchscreens pass the ESD test and prevent touch functionality failure due to static electricity during use, existing technologies generally construct a "touchscreen ESD - system grounding - earth" discharge path to effectively dissipate static electricity from the touchscreen. The core logic is as follows: the touchscreen contacts the entire chassis through the metal back frame of the LCD module; the chassis is then connected to the motherboard's ground terminal through conductive components; and the motherboard is finally connected to earth through the power adapter, ultimately completing the discharge of static electricity from the touchscreen.

[0003] However, the aforementioned electrostatic discharge (ESD) protection structure is only a general protection solution applicable to traditional wide-bezel touchscreens. With the increasing demand for high-end and thinner laptops, narrow-bezel touchscreens have become the mainstream design trend in the industry. The display area of ​​the touchscreen has increased from below 80% to over 90%, requiring the sensor traces to extend outwards to accommodate the narrow bezel structure. The traditional design condition of the LCD module completely covering the sensor traces under wide bezels has been broken, and the adaptability of existing ESD protection solutions is gradually becoming insufficient.

[0004] Specifically, the narrow bezel design of the touchscreen necessitates that the touchscreen's sensor lines extend towards the edges. However, the size of the LCD module is limited by the overall structure and cannot be expanded outwards simultaneously. Consequently, the metal back frame of the LCD module cannot cover the extended sensor lines, leaving them exposed. Existing electrostatic discharge (ESD) protection solutions only rely on the shared grounding of the entire casing and the LCD module's back frame to dissipate static electricity in the center area of ​​the touchscreen. They lack a dedicated ESD dissipation structure for the exposed sensor lines and rely solely on a single grounding method using a flexible circuit board grounding window, which is insufficient to address the ESD dissipation needs at the touchscreen's edges. Utility Model Content

[0005] In view of this, the purpose of this application is to provide a touch screen electrostatic protection structure and display device to solve the problem that the existing touch screen electrostatic protection structure is difficult to meet the electrostatic conduction requirements of narrow bezel touch screens.

[0006] According to a first aspect of the present invention, a touch screen electrostatic discharge (ESD) protection structure is provided, wherein the touch screen ESD protection structure includes: a first conductive element, the first conductive element being grounded, the first conductive element including: a main body covering section, which is conductively connected to the grounded copper leakage area of ​​the flexible circuit board of the display module; and an edge extension section, which is disposed outside the sensing line of the display module, the extension direction of the edge extension section being the same as the extension direction of the sensing line, and a gap being provided between the edge extension section and the sensing line.

[0007] Preferably, the first conductive element further includes a central connecting segment, through which the main body covering segment and the edge extension segment are connected.

[0008] Preferably, the first conductive element is a conductive cloth, the main body covering section, the central connecting section and the edge extension section are integrally formed, the surface impedance of the conductive cloth is ≤0.1Ω / sq, and the thickness of the conductive cloth is 0.05mm to 0.1mm.

[0009] Preferably, the conductive cloth has a conductive adhesive layer on its surface, the thickness of the conductive adhesive layer is 0.02 mm to 0.03 mm, the adhesive strength of the conductive adhesive layer is ≥5 N / 25 mm, the surface impedance of the conductive adhesive layer is ≤0.1 Ω / sq, the tensile strength of the conductive adhesive layer is ≥10 N / cm, and the temperature resistance range of the conductive adhesive layer is -40℃ to 85℃.

[0010] Preferably, when the distance between the metal back frame of the display module and the main casing is 0.05mm to 0.1mm, the first conductive element is bonded to the metal back frame; when the distance between the metal back frame of the display module and the main casing is greater than 0.1mm but not more than 0.3mm, the touch screen electrostatic protection structure includes a second conductive element, the first conductive element and the metal back frame are electrically connected through the second conductive element, the second conductive element is conductive foam, and the thickness of the conductive foam is 0.1mm to 0.3mm.

[0011] Preferably, the first conductive element is silver paste with a thickness of 0.08 mm and a surface resistance of ≤0.05 Ω / sq. The first conductive element is conductively connected to the metal back frame of the display module through conductive cloth.

[0012] Preferably, the first conductive element is conductive ink, the surface resistance of the conductive ink is ≤0.1Ω / sq, and the first conductive element is conductively connected to the metal back frame of the display module through conductive cloth.

[0013] Preferably, the edge extension section is conductive foam with a thickness of 0.4 mm and a width of 1 mm. The conductive foam is bonded to the overall casing of the display module. The main body covering section is a metal grounding plate with a thickness of 0.1 mm. The metal grounding plate is electrically connected to the metal back frame of the display module through a wire.

[0014] Preferably, the main body covering section completely covers the grounded copper leakage area of ​​the flexible circuit board, the length of the edge extension section is consistent with the length of the sensing line, the width of the edge extension section is 1mm to 1.5mm, and the distance between the edge extension section and the sensing line is 0.5mm to 1mm.

[0015] According to a second aspect of the present invention, a display device is provided, wherein the display device includes a display module and a touch screen electrostatic protection structure as described above, the touch screen electrostatic protection structure being disposed on the display module.

[0016] The touchscreen electrostatic discharge (ESD) protection structure and display device of this utility model embodiment include a first conductive component comprising a main body covering section and an edge extension section. The main body covering section is electrically connected to the grounded copper leakage area of ​​the flexible circuit board of the display module. The edge extension section is disposed outside the sensing lines of the display module, extending in the same direction as the sensing lines, with a gap between the edge extension section and the sensing lines. The first conductive component is grounded, allowing static electricity that initially enters the sensing lines to be promptly conducted to the ground, while also grounding the flexible circuit board. This effectively solves the problem that existing touchscreen ESD protection structures cannot meet the ESD discharge requirements of narrow-bezel touchscreens.

[0017] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the electrostatic protection structure for a touch screen and a display device according to the present invention.

[0020] Figure 2 This is a schematic diagram of another embodiment of the touch screen electrostatic protection structure and display device according to the present invention.

[0021] Reference numerals: 1-First conductive element; 11-Main body covering section; 12-Edge extension section; 13-Central connecting section; 2-Second conductive element; 3-Metal back frame; 4-Sensing line; 5-Flexible circuit board; 50-Grounded copper leakage area. Detailed Implementation

[0022] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0023] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0024] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0025] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0026] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0027] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0028] The terminology used herein is for the purpose of describing various examples only and is not intended to limit the examples. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0029] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0030] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0031] like Figure 1 and Figure 2 As shown, according to a first aspect of the present invention, a touch screen electrostatic protection structure is provided, the touch screen electrostatic protection structure including a first conductive element 1.

[0032] In the following description, reference will be made to Figure 1 and Figure 2 The specific structure of the aforementioned components and their connection relationships within the electrostatic protection structure of the touchscreen are described in detail.

[0033] like Figure 1 and Figure 2 As shown, in this embodiment, the touchscreen electrostatic protection structure is disposed on the display module (which can be a laptop computer display module). The first conductive element 1 includes a main body covering section 11 and an edge extension section 12. The main body covering section 11 is conductively connected to the grounded copper leakage area 50 of the flexible circuit board 5 of the display module. The edge extension section 12 can be disposed on the outside of the sensor line 4 of the display module (specifically, the sensor line of the display module exposed outside the metal back frame 3). The extension direction of the edge extension section 12 is the same as the extension direction of the sensor line 4, and a gap is provided between the edge extension section 12 and the sensor line 4. The first conductive element 1 is grounded, so that the static electricity that originally entered the sensor line 4 can be timely conducted to the ground to avoid the sensor line 4 being damaged by electrostatic discharge, and at the same time, it can also ground the flexible circuit board 5. This configuration ensures reliable conductivity between the grounded copper leakage area 50 of the flexible circuit board 5 and the grounding terminal, while also directly dissipating static electricity at the edge of the touchscreen. This effectively meets the static electricity dissipation requirements of narrow-bezel touchscreens, increasing the pass rate of electrostatic discharge tests from below 70% to over 98%.

[0034] Preferred, such as Figure 1 and Figure 2 As shown, in this embodiment, the main covering section 11 can completely cover the grounding copper leakage area 50 of the flexible circuit board 5 to ensure the reliability of the grounding of the flexible circuit board 5. The length of the edge extension section 12 can be the same as the length of the sensing line 4 (it can be 80% of the short side length of the touch screen). The width of the edge extension section 12 can be 1mm to 1.5mm (inclusive), and the distance between the edge extension section 12 and the sensing line 4 can be 0.5mm to 1mm. However, it is not limited to this; the fact that the length of the edge extension section 12 is the same as the length of the sensing line 4 is only a preferred case in this embodiment. In actual production, the length of the edge extension section 12 can also be less than the length of the sensing line 4, and the edge extension section 12 can be only set on the outside of the sensing line 4 in areas susceptible to static electricity.

[0035] Preferred, such as Figure 1 and Figure 2 As shown, in this embodiment, the first conductive element 1 may further include a central connecting segment 13. The main body covering segment 11 and the edge extension segment 12 can be connected through the central connecting segment 13, so that the first conductive element 1 is connected into a whole. The integrated structural design effectively improves the assembly efficiency of the first conductive element 1 and shortens the assembly time of the whole machine.

[0036] Preferred, such as Figure 1 and Figure 2 As shown, in one embodiment, the first conductive element 1 can be a conductive cloth. The main body covering section 11, the central connecting section 13, and the edge extension section 12 can be integrally formed. Specifically, the conductive cloth can be a copper-nickel composite material. The surface impedance of the conductive cloth is ≤0.1Ω / sq, and the thickness of the conductive cloth can be 0.05mm to 0.1mm (inclusive). This configuration satisfies the requirement for rapid electrostatic conduction (conduction speed is 30% faster than traditional conductive foam) and is also compatible with the thin and light structure of narrow-bezel touchscreens (the thickness is only 1 / 3 of that of traditional conductive foam, avoiding the occupation of internal space).

[0037] Furthermore, preferably, such as Figure 1 and Figure 2 As shown, in this embodiment, a conductive adhesive layer may be provided on the surface of the conductive cloth to bond and fix the conductive cloth. The thickness of the conductive adhesive layer can be from 0.02mm to 0.03mm (inclusive), and the adhesive strength of the conductive adhesive layer is ≥5N / 25mm to ensure that the conductive cloth does not fall off after application. The surface impedance of the conductive adhesive layer is ≤0.1Ω / sq to ensure the conduction speed of static electricity. The tensile strength of the conductive adhesive layer is ≥10N / cm to adapt to the mechanical stress during assembly and use of the entire machine. The temperature resistance range of the conductive adhesive layer is -40℃ to 85℃ (inclusive) to adapt to the operating environment of the laptop computer.

[0038] In addition, preferred, such as Figure 1 and Figure 2 As shown, in this embodiment, the metal back frame 3 and the main casing (not shown) are located on opposite sides of the thickness direction of the first conductive element 1. For different overall grounding layouts, the touchscreen electrostatic protection structure can employ two different adaptive conduction methods. Specifically, in... Figure 1 In the illustrated embodiment, when the distance between the metal back frame 3 of the display module and the overall casing is 0.05mm to 0.1mm (inclusive), the first conductive element 1 and the metal back frame 3 can be directly bonded through the conductive adhesive layer to achieve grounding. However, in the case of... Figure 2In the illustrated embodiment, when the distance between the metal back frame 3 of the display module and the main casing is greater than 0.1 mm but not more than 0.3 mm, the touchscreen electrostatic protection structure may further include a second conductive element 2. The first conductive element 1 and the metal back frame 3 are electrically connected through the second conductive element 2. Preferably, the second conductive element 2 can be conductive foam with a thickness of 0.1 mm to 0.3 mm (inclusive). This allows the first conductive element 1 to be connected to the grounding terminal of the motherboard through the main casing, thereby achieving grounding.

[0039] Preferably, in another embodiment, the first conductive element 1 includes a main body covering section 11, a central connecting section 13, and an edge extension section 12. The first conductive element 1 can be silver paste. The silver paste can be printed on top of insulating ink using a screen printing process. The thickness of the silver paste can be 0.08 mm, and the surface impedance of the silver paste is ≤0.05 Ω / sq. The silver paste extends to the grounded copper leakage area 50 of the flexible circuit board 5. The first conductive element 1 and the metal back frame 3 of the display module can be electrically connected through conductive cloth to achieve grounding. The conductive cloth covers the grounded copper leakage area 50 of the flexible circuit board 5. The silver paste collects static electricity at the edges and conducts it to the metal back frame 3 through the conductive cloth, completing the static discharge.

[0040] In another preferred embodiment, the first conductive element 1 includes a main body covering section 11, a central connecting section 13, and an edge extension section 12. The first conductive element 1 can also be conductive ink. The conductive ink can be printed on the outside of the sensing line 4 using a screen printing process. The surface impedance of the conductive ink is ≤0.1Ω / sq. The first conductive element 1 and the metal back frame 3 of the display module can be electrically connected through a conductive cloth to achieve grounding. The conductive ink collects static electricity at the edge and conducts it to the metal back frame 3 through the conductive cloth, completing the static discharge.

[0041] In another preferred embodiment, the first conductive element 1 includes a main body covering section 11 and an edge extension section 12. The edge extension section 12 can be conductive foam. The conductive foam has a thickness of 0.4 mm and a width of 1 mm. The conductive foam is bonded to the casing of the display module so that static electricity that initially enters the sensor line 4 can be promptly conducted to ground. The main body covering section 11 can be a metal grounding plate (made of brass) with a thickness of 0.1 mm. The metal grounding plate and the metal back frame 3 of the display module can be electrically connected via a wire, thereby achieving static electricity release of the first conductive element 1.

[0042] Furthermore, according to a second aspect of this utility model, a display device is provided, the display device including a display module and a touch screen electrostatic discharge (ESD) protection structure as described above. The display device can be a laptop computer, and the display module can be a display module of a laptop computer. The touch screen ESD protection structure is disposed on the display module.

[0043] During use, first clean the dust and oil from the grounding copper leakage area 50 and the edge bonding position of the flexible circuit board 5 (use isopropyl alcohol to wipe, avoiding impurities from affecting conductivity). Then align the main body covering section 11 of the first conductive element 1 with the grounding copper leakage area 50 of the flexible circuit board 5, and tightly bond it with the conductive adhesive layer (ensuring no bubbles, no misalignment, and 100% coverage). At the same time, continuously bond the edge extension section 12 along the edge of the touch screen on the outside of the sensor line 4. Grounding the first conductive element 1 allows the static electricity that originally entered the sensor line 4 to be promptly conducted to the ground, preventing the sensor line 4 from being damaged by electrostatic discharge, while also grounding the flexible circuit board 5. In this way, reliable conductivity between the grounding copper leakage area 50 of the flexible circuit board 5 and the grounding terminal is ensured, and static electricity at the edge of the touch screen is directly dissipated, effectively meeting the electrostatic discharge requirements of narrow bezel touch screens, and increasing the pass rate of the electrostatic discharge test of the display device from below 70% to above 98%.

[0044] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The scope of protection of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A touchscreen electrostatic protection structure, disposed in a display module, characterized in that, The electrostatic protection structure for the touch screen includes: A first conductive element, the first conductive element being grounded, the first conductive element comprising: The main body covering section is electrically connected to the grounded copper leakage area of ​​the flexible circuit board of the display module; and An edge extension segment is disposed outside the sensing line of the display module. The extension direction of the edge extension segment is the same as the extension direction of the sensing line, and a gap is provided between the edge extension segment and the sensing line.

2. The touchscreen electrostatic protection structure according to claim 1, characterized in that, The first conductive element further includes a central connecting segment, through which the main body covering segment and the edge extension segment are connected.

3. The touchscreen electrostatic protection structure according to claim 2, characterized in that, The first conductive element is a conductive cloth. The main body covering section, the central connecting section and the edge extension section are integrally formed. The surface impedance of the conductive cloth is ≤0.1Ω / sq and the thickness of the conductive cloth is 0.05mm to 0.1mm.

4. The touchscreen electrostatic protection structure according to claim 3, characterized in that, The conductive cloth has a conductive adhesive layer on its surface. The thickness of the conductive adhesive layer is 0.02 mm to 0.03 mm. The adhesive layer has a viscosity of ≥5 N / 25 mm, a surface impedance of ≤0.1 Ω / sq, a tensile strength of ≥10 N / cm, and a temperature resistance range of -40℃ to 85℃.

5. The touchscreen electrostatic protection structure according to claim 4, characterized in that, When the distance between the metal back frame of the display module and the main body is 0.05mm to 0.1mm, the first conductive element is bonded to the metal back frame; When the distance between the metal back frame of the display module and the main casing is greater than 0.1 mm and does not exceed 0.3 mm, the electrostatic protection structure of the touch screen includes a second conductive component. The first conductive component is conductively connected to the metal back frame through the second conductive component. The second conductive component is conductive foam with a thickness of 0.1 mm to 0.3 mm.

6. The touchscreen electrostatic protection structure according to claim 2, characterized in that, The first conductive element is silver paste with a thickness of 0.08 mm and a surface resistance of ≤0.05 Ω / sq. The first conductive element is conductively connected to the metal back frame of the display module through conductive cloth.

7. The touchscreen electrostatic protection structure according to claim 2, characterized in that, The first conductive element is conductive ink, and the surface resistance of the conductive ink is ≤0.1Ω / sq. The first conductive element is conductively connected to the metal back frame of the display module through conductive cloth.

8. The touchscreen electrostatic protection structure according to claim 1, characterized in that, The edge extension section is conductive foam with a thickness of 0.4 mm and a width of 1 mm. The conductive foam is bonded to the overall casing of the display module. The main body covering section is a metal grounding plate with a thickness of 0.1 mm. The metal grounding plate is conductively connected to the metal back frame of the display module through a wire.

9. The touchscreen electrostatic protection structure according to any one of claims 1 to 8, characterized in that, The main body covering section completely covers the grounded copper leakage area of ​​the flexible circuit board. The length of the edge extension section is the same as the length of the sensing line. The width of the edge extension section is 1mm to 1.5mm. The distance between the edge extension section and the sensing line is 0.5mm to 1mm.

10. A display device, characterized in that, The display device includes a display module and a touch screen electrostatic protection structure as described in any one of claims 1 to 9, wherein the touch screen electrostatic protection structure is disposed on the display module.

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