Flexible touch screen

Abstract

The utility model relates to the technical field of touch screens, in particular to a flexible touch screen which comprises a supporting substrate, a flexible conducting layer and a surface protection layer which are sequentially arranged, a nanofiber layer is arranged between the flexible conducting layer and the supporting substrate, the nanofiber layer is formed by bending and arranging nanofiber filaments, and the nanofiber filaments are spiral. The flexible touch screen has the advantages of being light, thin, durable and high in tensile strength.

Description

Technical Field

[0001] The utility model relates to the technical field of touch screens, in particular to a flexible touch screen. Background Art

[0002] A touch screen is an interactive input device that allows users to interact with electronic devices by directly touching images or text on the screen. Through the touch screen, users can interact with multimedia software such as video, audio, and images by clicking, dragging, and zooming on the screen, which improves the convenience and efficiency of users' operation of smart electronic devices.

[0003] Smart electronic devices such as mobile phones and tablets have great requirements for thinness. Thin devices are easier to carry and are therefore more popular in the market. Existing flexible touch screens can be very thin, but in order to improve durability, an additional protective layer is usually required. The protective layer usually has a certain thickness to play a certain protective role, which affects the thickness and weight of the touch screen, which is contrary to the concept of pursuing thinness in electronic devices. Therefore, there is an urgent need for a touch screen that is light in weight, highly durable, and has high tensile strength. Utility Model Content

[0004] In order to solve the problems in the above background technology, the utility model provides a flexible touch screen, which is thin and light, durable and has high tensile strength.

[0005] The utility model solves the technical problem by adopting the following solution: a flexible touch screen comprises a supporting substrate, a flexible conductive layer and a surface protection layer arranged in sequence, a nanofiber layer is arranged between the flexible conductive layer and the supporting substrate, the nanofiber layer is composed of nanofiber filaments arranged in a bent manner, and the nanofiber filaments are in a spiral shape.

[0006] Furthermore, the nanofiber layer has at least two layers which are stacked on each other.

[0007] Furthermore, the corresponding fiber filaments in adjacent nanofiber layers have different handedness.

[0008] Furthermore, grooves are etched on the surface of the nanofiber filaments.

[0009] Furthermore, the nanofiber layer is filled with nanoparticles.

[0010] Furthermore, the thickness of the nanofiber layer is 0.5um-95um.

[0011] In summary, the beneficial effects of the utility model are:

[0012] The nanofiber layer acts as a protective layer, which ensures the thinness of the touch screen while improving the touch screen's resistance to environmental factors;

[0013] The nanofiber filaments are spiral and arranged through bends to form a nanofiber layer, which increases the elasticity and tensile resistance of the material;

[0014] Multiple stacked nanofiber layers provide additional structural support, reducing fatigue damage caused by repeated bending;

[0015] Fibers with different rotation directions in adjacent nanofiber layers help to disperse stress and improve the overall stability of the touch screen;

[0016] The surface of the nanofibers is etched with grooves, which can increase the surface area of ​​the fibers, increase the contact area between the fibers and the adhesive, and enhance the bonding strength.

[0017] The filling of nanoparticles can improve the mechanical strength and toughness of the nanofiber layer, further improving the performance of the touch screen.

[0018] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the front view of this embodiment;

[0020] Figure 2 It is a structural schematic diagram of this embodiment;

[0021] Figure 3 This is a front view of the nanofiber filament of this embodiment.

[0022] In the figure: 1. Support substrate; 2. Flexible conductive layer; 3. Surface protection layer; 4. Nanofiber layer; 41. Nanofiber filaments. DETAILED DESCRIPTION

[0023] In order to make the content of the utility model more clearly understood, the utility model is further described below based on specific embodiments in combination with the accompanying drawings.

[0024] It should be noted that the terms "center", "upper", "lower", "front", "back", "left", "right", "inner", "outer" and the like used herein to indicate directions or positional relationships are based on directions or positional relationships 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. Unless otherwise specified, "plurality" means two or more.

[0025] Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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 communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood by specific circumstances.

[0026] like Figures 1 to 3 As shown, a flexible touch screen comprises, from top to bottom, a supporting substrate 1, a flexible conductive layer 2 and a surface protection layer 3, wherein a nanofiber layer 4 is disposed between the flexible conductive layer 2 and the supporting substrate 1, and the nanofiber layer 4 is composed of nanofiber filaments 41 arranged in a bent manner. Specifically, as Figure 3 As shown, the nanofiber filaments 41 are in a spiral shape.

[0027] The supporting substrate 1 of this embodiment is made of polyimide material, the flexible conductive layer 2 can be made of metal grid, conductive polymer or nano silver wire material, the nanofiber layer 4 is composed of polymer nanofibers, and the surface protection layer 3 is chemically strengthened glass or transparent polycarbonate.

[0028] In this embodiment, the nanofiber layer 4 is bonded to the supporting substrate 1 and the flexible conductive layer 2 by means of flexible epoxy resin through hot pressing, thereby ensuring close bonding and long-term stability between the layers.

[0029] The nanofiber layer 4 has at least two layers which are stacked and bonded to each other, and the corresponding fibers in adjacent nanofiber layers 4 have different rotation directions. The multi-layer stacking of the nanofiber layer 4 can provide better mechanical support and durability, and the fibers with different rotation directions help to form a more effective current path, thereby improving the response speed and sensitivity of the touch screen.

[0030] like Figure 1 As shown, the nanofiber layer 4 of this embodiment is provided with two layers, which are bonded together by an adhesive, so as to ensure the lightness and thinness of the nanofiber layer 4 while ensuring the tensile strength.

[0031] The surface of the nanofiber filament 41 is etched with grooves by micro-nano processing techniques such as photolithography, electron beam etching or chemical etching, and after surface treatment, a conductive material or an anti-corrosion material can be coated to further improve the performance of the nanofiber filament 41. By adopting the above technical solution, the grooves can increase the surface area of ​​the fiber filament, increase its contact area with the adhesive, and enhance the bonding strength; in addition, the grooves can serve as a stress concentration relief point, which helps to distribute the stress more evenly when the material is bent or stretched.

[0032] like Figure 2As shown, the nanofiber layer 4 is filled with nanoparticles; the nanoparticles can be filled into the nanofiber layer 4 by a variety of methods, including co-spinning, dip coating, spray coating or chemical vapor deposition. The nanoparticles of this embodiment can be materials with high thermal conductivity such as metals or carbon-based materials, so as to improve the thermal management of the touch screen and prevent local overheating. The nanoparticles can also be metals or metal oxides, which can improve the electrical conductivity and thermal conductivity of the nanofiber layer 4, contribute to the rapid transmission of electrical signals and the effective dispersion of heat. In addition, by adding nanoparticles, the mechanical strength and toughness of the nanofiber layer 4 can also be improved, making the touch screen more wear-resistant and tear-resistant.

[0033] The thickness of the nanofiber layer 4 is 0.5um–95um. The 0.5um-8um nanofiber layer 4 is relatively thin, transparent, and can provide extremely high flexibility. At the same time, it can act as a buffer layer to absorb and disperse impact force, protect the bottom flexible conductive layer 2 and other sensitive components, and is suitable for applications that require frequent bending, such as wearable devices, curved display screens, and flexible electronics. The nanofiber layer 4 above 8um can provide better durability and protection, increase the impact resistance and puncture resistance of the touch screen, and ensure that the display effect of the touch screen is not affected while maintaining a certain light transmittance.

[0034] The embodiments described above are only preferred implementation modes of the present utility model and cannot be used to limit the protection scope of the present utility model. Any non-substantial changes and modifications made by technicians in this field on the basis of the utility model shall fall within the protection scope of the present utility model.

Claims

1. A flexible touch screen, comprising a supporting substrate (1), a flexible conductive layer (2) and a surface protection layer (3) arranged in sequence, characterized in that: A nanofiber layer (4) is arranged between the flexible conductive layer (2) and the supporting substrate (1); the nanofiber layer (4) is composed of nanofiber filaments (41) arranged in a bent manner; and the nanofiber filaments (41) are in a spiral shape.

2. A flexible touch screen according to claim 1, characterized in that: The nanofiber layer (4) has at least two layers which are stacked on top of each other.

3. A flexible touch screen according to claim 2, characterized in that: The handedness of the corresponding fiber filaments in the adjacent nanofiber layers (4) is different.

4. The flexible touch screen according to claim 1, characterized in that: Grooves are etched on the surface of the nanofiber filaments (41).

5. The flexible touch screen according to claim 1, characterized in that: The nanofiber layer (4) is filled with nanoparticles.

6. The flexible touch screen according to claim 1, characterized in that: The thickness of the nanofiber layer (4) is 0.5 um-95 um.

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