Double-layer conductive film anti-electromagnetic interference structure of capacitive touch screen

Abstract

The utility model relates to the field of anti-electromagnetic interference structures, in particular to a capacitive touch screen double-layer conductive film anti-electromagnetic interference structure which comprises a display substrate set, a first conductive mechanism, an isolation flexible film, a second conductive mechanism and a protection plate set. A first conductive mechanism is arranged above the display substrate group, the first conductive mechanism comprises a first flexible substrate, a second conductive mechanism is arranged above the first conductive mechanism, the second conductive mechanism comprises a second flexible substrate, an isolation flexible film is arranged between the first conductive mechanism and the second conductive mechanism, and a protection plate group is arranged above the second conductive mechanism; according to the utility model, the y-axis silver nanowires and the x-axis silver nanowires are crosswise arranged in the first conductive mechanism to form a primary planar conductive network, and the first diagonal silver nanowires and the second diagonal silver nanowires which are linearly arranged along the diagonal direction are arranged in the second conductive mechanism to form a three-dimensional conductive network in cooperation with the y-axis silver nanowires and the x-axis silver nanowires.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic interference suppression structures, and more particularly to an electromagnetic interference suppression structure for a capacitive touchscreen with a double-layer conductive film. Background Technology

[0002] A capacitive touchscreen creates a low-voltage alternating electric field within the conductive body. When a user touches the screen, due to the human body's electric field, a coupling capacitor is formed between the finger and the conductive film inside the touchscreen. Changes in this capacitor cause changes in the current inside the touchscreen. The current emitted from the four electrodes flows to the touch point. The strength of the current is proportional to the distance from the finger to the electrode. The controller located behind the touchscreen calculates the proportion and strength of the current to accurately determine the position of the touch point.

[0003] Traditional capacitive touchscreens typically use a double-layer conductive film, with one layer having linearly arranged y-axis ITO lines and the other having linearly arranged x-axis ITO lines. This arrangement cannot form an effective anti-electromagnetic interference structure, allowing external electromagnetic waves to easily penetrate the touchscreen and interfere with the internal electronic components.

[0004] Therefore, since the traditional double-layer conductive film cannot form an effective anti-electromagnetic interference structure, an anti-electromagnetic interference structure for a capacitive touch screen double-layer conductive film can be designed. By arranging silver nanowires along a certain pattern on the surface of the double-layer conductive film, a three-dimensional intersecting anti-electromagnetic interference structure is formed, which facilitates the solution of the above problems. Utility Model Content

[0005] To overcome the problem of traditional capacitive touchscreens having two conductive films, typically one layer with linearly arranged y-axis ITO lines and another with linearly arranged x-axis ITO lines, this arrangement cannot form an effective anti-electromagnetic interference structure, allowing external electromagnetic waves to easily penetrate the touchscreen and interfere with internal electronic components.

[0006] The technical solution of this utility model is as follows: a capacitive touch screen double-layer conductive film anti-electromagnetic interference structure, including a display substrate assembly, a first conductive mechanism, an insulating flexible film, a second conductive mechanism, and a protective plate assembly; the display substrate assembly is provided with a first conductive mechanism above it for anti-electromagnetic interference, the first conductive mechanism including a first flexible substrate, a second conductive mechanism is provided above it for cooperating with the first conductive mechanism, the second conductive mechanism including a second flexible substrate, an insulating flexible film for isolation is provided between the first conductive mechanism and the second conductive mechanism, and a protective plate assembly for protecting the touch screen is provided above the second conductive mechanism.

[0007] Preferably, this application combines a display substrate assembly, a first conductive mechanism, an insulating flexible film, a second conductive mechanism, and a protective plate assembly. During operation, the display substrate assembly displays images, the first and second conductive mechanisms form a three-dimensional conductive network to prevent external electromagnetic waves from easily penetrating the touchscreen, and the insulating flexible film isolates the first and second conductive mechanisms, while the protective plate assembly protects the touchscreen.

[0008] Preferably, the surface of the first flexible substrate has multiple sets of y-axis silver nanowires arranged linearly along the y-axis, and the surface of the second flexible substrate has multiple sets of x-axis silver nanowires arranged along the x-axis.

[0009] Preferably, multiple sets of y-axis silver nanowires and multiple sets of x-axis silver nanowires are staggered along the surface of the first flexible substrate.

[0010] Preferably, the surface of the second flexible substrate has multiple sets of first diagonal silver nanowires arranged linearly along one diagonal direction, and the surface of the second flexible substrate has multiple sets of second diagonal silver nanowires arranged linearly along the other diagonal direction.

[0011] Preferably, multiple sets of first diagonal silver nanowires and multiple sets of second diagonal silver nanowires are respectively arranged alternately along the surface of the second flexible substrate.

[0012] Preferably, the display substrate assembly includes a rear display panel, a front display panel is disposed above the rear display panel, and a liquid crystal filter assembly is disposed between the rear display panel and the front display panel.

[0013] Preferably, the protective panel assembly includes a protective glass cover, the surface of which is fitted with a flexible anti-scratch film, and the surface of the flexible anti-scratch film is fitted with an oleophobic film.

[0014] The beneficial effects of this invention are as follows: Compared with traditional double-layer conductive films, which cannot form an effective anti-electromagnetic interference structure, this application forms a preliminary planar conductive network by arranging y-axis silver nanowires and x-axis silver nanowires in a cross arrangement in the first conductive structure. In addition to the conventional y-axis and x-axis silver nanowires, first and second diagonal silver nanowires are also arranged linearly along the diagonal direction on the second flexible substrate. This arrangement can work with the y-axis and x-axis silver nanowires to form a three-dimensional conductive network, further improving the anti-electromagnetic interference performance. It can effectively block external electromagnetic waves from penetrating the touch screen, reduce interference to internal electronic components, and improve the response speed and accuracy of the touch screen. Attached Figure Description

[0015] Figure 1 The diagram shown is a schematic representation of the overall structure of the electromagnetic interference-resistant structure of this utility model.

[0016] Figure 2The diagram shown is a schematic representation of the display substrate assembly structure of the electromagnetic interference-resistant structure of this utility model.

[0017] Figure 3 The diagram shown is a schematic diagram of the first conductive mechanism of the anti-electromagnetic interference structure of this utility model.

[0018] Figure 4 The diagram shown is a schematic representation of the second conductive mechanism of the electromagnetic interference-resistant structure of this utility model.

[0019] Figure 5 The diagram shown is a schematic representation of the protective plate assembly of the electromagnetic interference-resistant structure of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Display substrate assembly; 101. Rear display panel; 102. Liquid crystal filter assembly; 103. Front display panel; 2. First conductive mechanism; 201. First flexible substrate; 202. Y-axis silver nanowire; 203. X-axis silver nanowire; 3. Flexible insulating film; 4. Second conductive mechanism; 401. Second flexible substrate; 402. First diagonal silver nanowire; 403. Second diagonal silver nanowire; 5. Protective plate assembly; 501. Protective glass cover; 502. Flexible scratch-resistant film; 503. Oleophobic film. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Please see Figures 1-5 This utility model provides an embodiment of a capacitive touchscreen dual-layer conductive film anti-electromagnetic interference structure, including a display substrate group 1, a first conductive mechanism 2, an insulating flexible film 3, a second conductive mechanism 4, and a protective plate group 5; the display substrate group 1 is provided with a first conductive mechanism 2 above it for anti-electromagnetic interference, the first conductive mechanism 2 includes a first flexible substrate 201, the first conductive mechanism 2 is provided with a second conductive mechanism 4 above it for cooperating with the first conductive mechanism 2, the second conductive mechanism 4 includes a second flexible substrate 401, an insulating flexible film 3 is provided between the first conductive mechanism 2 and the second conductive mechanism 4 for isolation, and a protective plate group 5 is provided above the second conductive mechanism 4 for protecting the touchscreen.

[0023] Please see Figures 1-3In this embodiment, multiple sets of y-axis silver nanowires 202 are linearly arranged along the y-axis on the surface of the first flexible substrate 201, and multiple sets of x-axis silver nanowires 203 are linearly arranged along the x-axis on the surface of the second flexible substrate 401. The multiple sets of y-axis silver nanowires 202 and multiple sets of x-axis silver nanowires 203 are interleaved along the surface of the first flexible substrate 201. By interleaving and combining the multiple sets of y-axis silver nanowires 202 and multiple sets of x-axis silver nanowires 203, a planar conductive network can be initially formed to block the penetration of external electromagnetic waves. At the same time, the silver nanowires have better conductivity and light transmittance. Compared with ITO wires, they can provide higher touch accuracy and response speed, while maintaining high light transmittance and not affecting the display effect.

[0024] Please see Figures 2-4 In this embodiment, multiple sets of first diagonal silver nanowires 402 are linearly arranged along one diagonal direction on the surface of the second flexible substrate 401, and multiple sets of second diagonal silver nanowires 403 are linearly arranged along the other diagonal direction on the surface of the second flexible substrate 401. The multiple sets of first diagonal silver nanowires 402 and multiple sets of second diagonal silver nanowires 403 are respectively staggered along the surface of the second flexible substrate 401. By combining the multiple sets of first diagonal silver nanowires 402 and multiple sets of second diagonal silver nanowires 403, when they are cross-combined, they can cooperate with multiple sets of y-axis silver nanowires 202 and multiple sets of x-axis silver nanowires 203 to form a three-dimensional conductive network, further improving the performance of electromagnetic interference resistance.

[0025] Please see Figures 3-5 In this embodiment, the display substrate assembly 1 includes a rear display panel 101, a front display panel 103 is disposed above the rear display panel 101, and a liquid crystal filter assembly 102 is disposed between the rear display panel 101 and the front display panel 103. The rear display panel 101, the front display panel 103, and the liquid crystal filter assembly 102 are combined. When the touchscreen is working, the rear display panel 101 is responsible for displaying images and composing the screen, while the liquid crystal filter assembly 102 adjusts the light transmittance according to the input signal, thereby improving the light transmittance of the front display panel. The corresponding image is displayed on the plate 103. The protective plate assembly 5 includes a protective glass cover plate 501. A flexible anti-scratch film 502 is attached to the surface of the protective glass cover plate 501. An oleophobic film 503 is attached to the surface of the flexible anti-scratch film 502. The protective glass cover plate 501, the flexible anti-scratch film 502 and the oleophobic film 503 are combined. The protective glass cover plate 501 can resist external impacts and scratches, while the flexible anti-scratch film 502 and the oleophobic film 503 further enhance the durability and easy cleaning of the surface.

[0026] During operation, the y-axis silver nanowires 202 and x-axis silver nanowires 203 on the first flexible substrate 201 are arranged in an interlaced manner. Combined with the diagonal silver nanowire layout on the second flexible substrate 401, a three-dimensional intersecting conductive grid is formed. This layout can not only accurately locate the position of the touch point, but also effectively disperse and reflect external electromagnetic waves, thus playing a shielding role.

[0027] The insulating flexible membrane 3 is located between the two conductive layers, ensuring that they work independently without affecting each other. This membrane also acts as a buffer, reducing the risk of damage caused by mechanical stress.

[0028] The protective glass cover 501 provides basic physical protection, the flexible scratch-resistant film 502 further enhances scratch resistance, and the oleophobic film 503 helps keep the screen clean, reducing the adhesion of grease and dirt, thereby maintaining a good touch experience.

[0029] Through the above steps, this application combines a display substrate assembly 1, a first conductive mechanism 2, an insulating flexible film 3, a second conductive mechanism 4, and a protective plate assembly 5. During operation, the display substrate assembly 1 displays an image, the first conductive mechanism 2 and the second conductive mechanism 4 form a three-dimensional conductive network to prevent external electromagnetic waves from easily penetrating the touch screen, and the insulating flexible film 3 isolates the first conductive mechanism 2 and the second conductive mechanism 4, while the protective plate assembly 5 protects the touch screen. The y-axis silver nanowires 202 and x-axis silver nanowires 203 on the first flexible substrate 201 are interlaced, and together with the diagonal silver nanowire layout on the second flexible substrate 401, a three-dimensional intersecting conductive grid is formed. This layout can not only accurately locate the position of the touch point, but also effectively disperse and reflect external electromagnetic waves, thus playing a shielding role.

Claims

1. A capacitive touchscreen with a double-layer conductive film anti-electromagnetic interference structure, comprising a display substrate assembly (1); characterized in that: It also includes a first conductive mechanism (2), an isolation flexible film (3), a second conductive mechanism (4), and a protective plate assembly (5); the display substrate assembly (1) is provided with a first conductive mechanism (2) for resisting electromagnetic interference. The first conductive mechanism (2) includes a first flexible substrate (201). The first conductive mechanism (2) is provided with a second conductive mechanism (4) for cooperating with the first conductive mechanism (2). The second conductive mechanism (4) includes a second flexible substrate (401). An isolation flexible film (3) is provided between the first conductive mechanism (2) and the second conductive mechanism (4). The protective plate assembly (5) for protecting the touch screen is provided above the second conductive mechanism (4).

2. The anti-electromagnetic interference structure of the capacitive touch screen with a double-layer conductive film according to claim 1, characterized in that: The surface of the first flexible substrate (201) is arranged with multiple sets of y-axis silver nanowires (202) along the y-axis, and the surface of the second flexible substrate (401) is arranged with multiple sets of x-axis silver nanowires (203) along the x-axis.

3. The anti-electromagnetic interference structure of the capacitive touch screen with a double-layer conductive film according to claim 2, characterized in that: Multiple sets of y-axis silver nanowires (202) and multiple sets of x-axis silver nanowires (203) are interleaved along the surface of the first flexible substrate (201).

4. The anti-electromagnetic interference structure of the capacitive touch screen with a double-layer conductive film according to claim 1, characterized in that: The surface of the second flexible substrate (401) is linearly arranged with multiple sets of first diagonal silver nanowires (402) along one diagonal direction, and the surface of the second flexible substrate (401) is linearly arranged with multiple sets of second diagonal silver nanowires (403) along the other diagonal direction.

5. The anti-electromagnetic interference structure of the capacitive touch screen with a double-layer conductive film according to claim 4, characterized in that: Multiple sets of first diagonal silver nanowires (402) and multiple sets of second diagonal silver nanowires (403) are respectively arranged interlaced along the surface of the second flexible substrate (401).

6. The anti-electromagnetic interference structure of the capacitive touch screen with a double-layer conductive film according to claim 1, characterized in that: The display substrate assembly (1) includes a display back panel (101), a display front panel (103) is provided above the display back panel (101), and a liquid crystal filter assembly (102) is provided between the display back panel (101) and the display front panel (103).

7. The electromagnetic interference resistant structure of the capacitive touch screen with a double-layer conductive film according to claim 1, characterized in that: The protective panel assembly (5) includes a protective glass cover (501), a flexible anti-scratch film (502) is attached to the surface of the protective glass cover (501), and an oleophobic film (503) is attached to the surface of the flexible anti-scratch film (502).

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