Capacitive touch screen with extremely narrow edge

Abstract

The utility model provides a capacitive touch screen with an extremely narrow edge, which comprises a first electrode layer, a first bonding layer and a second electrode layer which are sequentially stacked from bottom to top, the first electrode layer comprises a plurality of first transparent electrodes and a first wiring area, the first transparent electrodes are arranged in the middle in parallel at equal intervals, and the first wiring area is arranged at the peripheral edge; the second electrode layer comprises a plurality of second transparent electrodes which are arranged in parallel at equal intervals in the middle and a second wiring area arranged on the peripheral edge, the first transparent electrodes and the second transparent electrodes form a net-shaped prismatic structure, and the first transparent electrodes and the second transparent electrodes form a capacitive touch circuit. The first wiring area and the second wiring area are overlapped in the thickness direction, and the thickness of the first bonding layer is larger than or equal to 0.1 mm. Compared with the prior art, the utility model has the advantages of simple structure, quickness in assembly and better shape resistance.

Description

Technical Field

[0001] This utility model relates to the technical field of touch screens, and in particular to a capacitive touch screen with an extremely narrow bezel. Background Technology

[0002] Capacitive touchscreens are a screen technology that detects touch points using human body sensing. Currently available medium to large-sized capacitive touchscreens suffer from excessive edge wiring, often arranged in a flat, sequential pattern, resulting in an overly large outer edge of the viewing area that severely impacts the overall aesthetics. Furthermore, the assembly process is relatively complex, leading to low production efficiency and high material costs. Moreover, current ultra-narrow bezel designs have poor structural strength, resulting in significant product deformation and causing touchscreen instability. Therefore, there is an urgent need to address these issues. Utility Model Content

[0003] To address the aforementioned issues, this invention provides an ultra-narrow bezel capacitive touchscreen, which effectively improves assembly efficiency, avoids skipping, reduces material costs, and enhances structural strength. This allows for extremely narrow wiring areas in medium to large-sized capacitive touchscreens, resulting in a larger and more aesthetically pleasing screen-to-body ratio.

[0004] This utility model achieves the above-mentioned objective through the following technical solution: an ultra-narrow bezel capacitive touch screen, comprising a first electrode layer, a first adhesive layer, and a second electrode layer stacked sequentially from bottom to top. The first electrode layer includes several parallel and equally spaced first transparent electrodes in the middle and a first wiring area on the outer edge. The second electrode layer includes several parallel and equally spaced second transparent electrodes in the middle and a second wiring area on the outer edge. The first transparent electrodes and the second transparent electrodes form a mesh-like prismatic structure. The first transparent electrodes and the second transparent electrodes form a capacitive touch circuit. The first wiring area and the second wiring area overlap in the thickness direction. The thickness of the first adhesive layer is greater than or equal to 0.1 mm.

[0005] Furthermore, the edge gap between the first transparent electrode and the second transparent electrode is 1mm; this maintains a relative distance and avoids causing jump points.

[0006] Furthermore, the thickness of the first electrode layer and the second electrode layer is 0.125 mm.

[0007] Furthermore, the thickness of the first adhesive layer is 0.175 mm; this maintains a suitable distance between the first electrode layer and the second electrode layer to avoid electric field interference.

[0008] Furthermore, both the first wiring area and the second wiring area have locking edges on their outer edges; this allows the first electrode layer and the second electrode layer to be directly locked to the backlight hardware of the display screen, reducing the number of overall structural components and improving assembly efficiency.

[0009] Furthermore, positioning holes are provided on the locking edge; this enables precise positioning of the first electrode layer and the second electrode layer, ensuring that the outer edge is relatively narrow and avoiding misalignment between the first wiring area and the second wiring area, which would increase the edge width.

[0010] Furthermore, a second adhesive layer is stacked on top of the second electrode layer.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: By overlapping the first and second wiring areas in the thickness direction, the outer edge size can be reduced by at least half, allowing the bezel to be narrower and resulting in a larger and more aesthetically pleasing screen-to-body ratio. Furthermore, limiting the thickness of the first adhesive layer to greater than or equal to 0.1mm effectively shields the electric field interference between the first and second electrode layers, eliminating the need for an additional shielding layer, simplifying the processing, reducing material costs, and improving production efficiency. Moreover, the thickness of the first adhesive layer also increases structural strength and provides better deformation resistance, preventing touchscreen deformation-induced jump point problems, thus solving the technical problems in the prior art. Overall, this utility model possesses the advantages of simple structure, quick assembly, and superior deformation resistance, effectively improving assembly efficiency, preventing jump points, reducing material costs, and increasing structural strength, enabling extremely narrow wiring areas for medium and large-sized capacitive touchscreens, resulting in a larger and more aesthetically pleasing screen-to-body ratio. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the first electrode in this utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the second electrode in this utility model;

[0015] Figure 4 This is a partial top view of the assembled component of this utility model.

[0016] The reference numerals in the attached drawings are explained as follows: 1-First electrode layer; 11-First transparent electrode; 12-First wiring area; 2-First adhesive layer; 3-Second electrode layer; 31-Second transparent electrode; 32-Second wiring area; 4-Locking edge; 41-Positioning hole; 5-Second adhesive layer; D-Edge gap. Detailed Implementation

[0017] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "left," "right," "inner," "outer," and similar expressions used in this specification are for illustrative purposes only.

[0018] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0019] like Figures 1 to 4 As shown, this utility model provides a preferred embodiment of a capacitive touchscreen with an extremely narrow bezel. The capacitive touchscreen with an extremely narrow bezel includes a first electrode layer 1, a first adhesive layer 2, and a second electrode layer 3 stacked sequentially from bottom to top. The first electrode layer 1 includes several parallel and equally spaced first transparent electrodes 11 in the center and a first wiring area 12 on the outer edge. The second electrode layer 3 includes several parallel and equally spaced second transparent electrodes 31 in the center and a second wiring area 32 on the outer edge. The first transparent electrodes 11 and the second transparent electrodes 31 form a mesh-like prismatic structure, and the first transparent electrodes 11 and the second transparent electrodes 31 form a capacitive touch circuit. The first wiring area 12 and the second wiring area 32 overlap in the thickness direction (see reference). Figure 4 As shown), the thickness of the first adhesive layer 2 is greater than or equal to 0.1 mm.

[0020] refer to Figure 4 As shown, the edge gap between the first transparent electrode 11 and the second transparent electrode 31 is 1 mm. In the figure, D represents the edge gap. The edge gap between the two transparent electrodes is 1 mm in all directions.

[0021] The thickness of the first electrode layer 1 and the second electrode layer 3 is 0.125 mm; the thickness of the first adhesive layer 2 is 0.175 mm. Alternatively, when the second electrode layer 3 is 0.188 mm or 0.25 mm, the thickness of the first adhesive layer 2 is 0.125 mm or 0.1 mm, which ensures that the beneficial effects of this invention are maintained while also making the overall capacitive touchscreen thinner.

[0022] Both the first wiring area 12 and the second wiring area 32 have locking edges 4 on their outer edges. Positioning holes 41 are provided on the locking edges 4. (Reference) Figure 4 As shown, the first electrode layer 1 and the second electrode layer 3 can be precisely bonded and assembled together through the positioning hole 41.

[0023] refer to Figure 1 As shown, a second adhesive layer 5 is stacked on top of the second electrode layer 3, which can easily bond the panel.

[0024] Specifically, the first electrode layer 1 and the second electrode layer 3 are both made of indium tin oxide, and the first adhesive layer 2 and the second adhesive layer 5 are both made of optically clear adhesive (OCA).

[0025] In summary, the technical solution of this utility model can fully and effectively achieve the aforementioned objectives. Furthermore, the structure and functional principles of this utility model have been fully verified in the embodiments, achieving the expected effects and objectives. Without departing from the principles and essence of this utility model, various changes or modifications can be made to the embodiments. Therefore, this utility model includes all substitutions within the scope mentioned in the patent application claims, and any equivalent changes made within the scope of this patent application are within the scope of the patent application.

Claims

1. A capacitive touchscreen with an extremely narrow bezel, comprising a first electrode layer (1), a first adhesive layer (2), and a second electrode layer (3) stacked sequentially from bottom to top, wherein the first electrode layer (1) comprises a plurality of parallel and equally spaced first transparent electrodes (11) in the middle and a first wiring area (12) disposed on the outer edge; the second electrode layer (3) comprises a plurality of parallel and equally spaced second transparent electrodes (31) in the middle and a second wiring area (32) disposed on the outer edge, wherein the first transparent electrodes (11) and the second transparent electrodes (31) form a mesh-like prismatic structure, and the first transparent electrodes (11) and the second transparent electrodes (31) form a capacitive touch circuit, characterized in that: The first wiring area (12) and the second wiring area (32) are overlapped in the thickness direction, and the thickness of the first adhesive layer (2) is greater than or equal to 0.1 mm.

2. The capacitive touchscreen with an ultra-narrow bezel according to claim 1, characterized in that: The edge gap between the first transparent electrode (11) and the second transparent electrode (31) is 1 mm.

3. A capacitive touchscreen with an ultra-narrow bezel according to claim 1, characterized in that: The thickness of the first electrode layer (1) and the second electrode layer (3) is 0.125 mm.

4. A capacitive touchscreen with an ultra-narrow bezel according to claim 3, characterized in that: The thickness of the first adhesive layer (2) is 0.175 mm.

5. A capacitive touchscreen with an ultra-narrow bezel according to claim 1, characterized in that: Both the outer edges of the first wiring area (12) and the second wiring area (32) are provided with locking edges (4).

6. A capacitive touchscreen with an ultra-narrow bezel according to claim 5, characterized in that: A positioning hole (41) is provided on the locking edge (4).

7. A capacitive touchscreen with an ultra-narrow bezel according to claim 1, characterized in that: A second adhesive layer (5) is stacked on top of the second electrode layer (3).

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