External hanging type touch screen structure

Abstract

The utility model discloses an external hanging type touch screen structure which comprises a display module, a second ITO conducting film and a first ITO conducting film which are sequentially arranged in a stacked mode from bottom to top, and the second ITO conducting film and the first ITO conducting film are different in structure. Wherein the first ITO conducting film comprises a first ITO plating layer, a first vanishing hardening layer, a first base material layer and a functional layer. And the first ITO plating layer is plated on the second ITO conductive film. The external hanging type touch screen structure is simpler in structure and lower in maintenance and replacement cost, and the thickness of the external hanging type touch screen structure can be reduced by replacing a glass cover plate and an ITO thin film in the prior art with the first ITO conductive film. Due to the arrangement of the functional layer, the external hanging type touch screen structure has one or more functions of anti-dazzle, anti-reflection, anti-fingerprint and the like, and has better performance compared with cover plate glass.

Description

Technical Field

[0001] The utility model belongs to the technical field of display screens, and particularly relates to an external touch screen structure. Background Art

[0002] The external touch screen directly installs the touch detection device of the touch screen system in front of the display device, and this kind of touch screen is easy to install. With the development of the inlaid touch screen, the market of the external touch screen has been impacted. The touch module of the inlaid touch screen is inside the display module, so the overall structure is thinner and lighter than that of the external touch screen. However, if the touch module of the inlaid touch screen is damaged, it needs to be replaced as a whole, and the maintenance cost is high. The outermost layer of the existing external touch screen is usually a glass cover plate, resulting in a relatively thick overall structure of the external touch screen, and the thinness and lightness are far less than those of the inlaid touch screen.

[0003] The information disclosed in this background art section is only intended to enhance the overall understanding of the utility model and should not be regarded as an admission or any form of suggestion that this information constitutes the prior art already known to those of ordinary skill in the art. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an external touch screen structure, which has a simple structure, a thinner thickness and has one or more functions such as anti-glare, anti-reflection, and anti-fingerprint.

[0005] In order to achieve the above purpose, a specific embodiment of the utility model provides an external touch screen structure, which includes a display module, a second ITO conductive film and a first ITO conductive film that are stacked in sequence from bottom to top, and the structures of the second ITO conductive film and the first ITO conductive film are different; wherein, the first ITO conductive film includes: a first ITO coating layer, a first shadow elimination and hardening layer, a first substrate layer and a functional layer. The first ITO coating layer is plated on the second ITO conductive film; the first shadow elimination and hardening layer is coated on the surface of the first ITO coating layer; the first substrate layer is arranged on the surface of the first shadow elimination and hardening layer; the functional layer is arranged on the surface of the first substrate layer.

[0006] In one or more embodiments of the utility model, the functional layer is selected from one or more of an anti-glare hardening layer, an anti-reflection layer and an anti-fouling layer; and / or, the thickness of the functional layer is between 3μm and 4μm.

[0007] In one or more embodiments of the utility model, the thickness of the first ITO coating layer is between 18nm and 30nm.

[0008] In one or more embodiments of the utility model, the thickness of the first shadow elimination and hardening layer is between 2μm and 3μm.

[0009] In one or more embodiments of the present utility model, the thickness of the first substrate layer is between 50 μm and 125 μm.

[0010] In one or more embodiments of the present utility model, the second ITO conductive film includes: an anti-adhesion layer, a second substrate layer, a second anti-glare hardening layer, and a second ITO plating layer. The anti-adhesion layer is disposed on the surface of the display module; the second substrate layer is disposed on the surface of the anti-adhesion layer; the second anti-glare hardening layer is disposed on the surface of the second substrate layer; and the second ITO plating layer is plated on the surface of the second anti-glare hardening layer.

[0011] In one or more embodiments of the present utility model, the thickness of the anti-adhesion layer is between 2 μm and 3 μm.

[0012] In one or more embodiments of the present utility model, the thickness of the second substrate layer is between 50 μm and 125 μm.

[0013] In one or more embodiments of the present utility model, the thickness of the second anti-glare hardening layer is between 2 μm and 3 μm.

[0014] In one or more embodiments of the present utility model, the thickness of the second ITO plating layer is between 18 nm and 30 nm.

[0015] Compared with the prior art, the external touch screen structure of the present utility model uses a first ITO conductive film to replace the glass cover plate and ITO film of the prior art, which can reduce the thickness of the external touch screen structure. The setting of the functional layer enables the external touch screen structure to have one or more functions such as anti-glare, anti-reflection, and anti-fingerprint, and has better performance than the cover glass. The external touch screen adopts the above structure, which has a simpler structure and lower maintenance and replacement costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is the first schematic diagram of the external touch screen structure in an embodiment of the present utility model;

[0018] Figure 2 It is the second schematic diagram of the external touch screen structure in an embodiment of the present utility model.

[0019] MAIN REFERENCE NUMERAL DESCRIPTION:

[0020] 1 - Display module, 2 - Second ITO conductive film, 21 - Anti - adhesion layer, 22 - Second substrate layer, 23 - Second anti - shadow hardening layer, 24 - Second ITO coating, 3 - First ITO conductive film, 31 - First ITO coating, 32 - First anti - shadow hardening layer, 33 - First substrate layer, 34 - Functional layer. Detailed implementation mode

[0021] In order to enable those skilled in the art to better understand the technical solutions in the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0022] As Figure 1 shown, an external touch - screen structure in an embodiment of the present utility model includes a display module 1, a second ITO conductive film 2 (indium tin oxide conductive film), and a first ITO conductive film 3 stacked in sequence from bottom to top, and the layer structures of the second ITO conductive film 2 and the first ITO conductive film 3 are different. Among them, the first ITO conductive film 3 includes a first ITO coating 31, a first anti - shadow hardening layer 32, a first substrate layer 33, and a functional layer 34. The first ITO coating 31 is plated on the second ITO conductive film 2; the first anti - shadow hardening layer 32 is coated on the surface of the first ITO coating 31; the first substrate layer 33 is disposed on the surface of the first anti - shadow hardening layer 32; the functional layer 34 is disposed on the surface of the first substrate layer 33.

[0023] The external touch - screen structure of the prior art has two ITO films with the same structure and a cover glass disposed on the outermost layer. The outermost layer of the external touch - screen structure of the present utility model uses the first ITO conductive film 3 composed of the first ITO coating 31, the first anti - shadow hardening layer 32, the first substrate layer 33, and the functional layer 34 to replace one ITO film and the cover glass in the prior art, which can effectively reduce the thickness of the external touch - screen structure. The setting of the functional layer 34 enables the external touch - screen structure to have one or more functions such as anti - glare, anti - reflection, and anti - fingerprint.

[0024] In an implementation mode, the display module 1, the second ITO conductive film 2, and the first ITO conductive film 3 are connected by OCA optical adhesive.

[0025] In one embodiment, the functional layer 34 is selected from one or more of an antiglare hardening layer, an antireflection layer, and an antifouling layer. For example, the functional layer 34 may be only one of the antiglare hardening layer, the antireflection layer, and the antifouling layer. When the functional layer 34 is a single-layer structure, it may have only one function such as antiglare, antireflection, and fingerprint resistance. Alternatively, the functional layer 34 is formed by laminating multiple layers of the antiglare hardening layer, the antireflection layer, and the antifouling layer. When the functional layer 34 is a composite layer structure, it may have multiple functions such as antiglare, antireflection, and fingerprint resistance.

[0026] The antiglare hardening layer is formed by dissolving inorganic metal oxides and silica into a resin and a solvent and adding other additives to form a slurry, which is then formed by coating. The inorganic metal oxides may be selected from, for example, Eckart's Z-757-G05M, Z-757-G69R, etc.

[0027] The antireflection layer is composed of coating layers with different thicknesses and refractive indices, which can cause a phase difference in the reflected light waves, thereby causing interference. By precisely controlling the thickness and refractive index of the coating layers, destructive interference occurs between the reflected light waves, that is, the reflected light waves cancel each other out, thereby minimizing the intensity of the reflected light and increasing the intensity of the transmitted light. For example, it is achieved by alternately depositing niobium oxide and silicon oxide.

[0028] The antifouling layer is formed by applying a layer of nanochemical material on the glass surface according to the principle of lotus leaves, making it have strong hydrophobicity, functions such as oil resistance and fingerprint resistance. Dirt, fingerprints, oil stains, etc. can be easily wiped clean. The surface is smoother and the hand feel is more comfortable. The nanochemical material may be selected from, for example, Daikin's UD509 in Japan, Shin-Etsu's KY1203, etc.

[0029] Furthermore, the thickness of the functional layer 34 is between 3 μm and 4 μm. Among them, the thickness of the first ITO coating layer 31 can be between 18 nm and 30 nm. The thickness of the first shadow elimination hardening layer 32 can be between 2 μm and 3 μm. The thickness of the first substrate layer 33 can be between 50 μm and 125 μm.

[0030] In one embodiment, as Figure 2 shown, the second ITO conductive film 2 includes an anti-adhesion layer 21, a second substrate layer 22, a second shadow elimination hardening layer 23, and a second ITO coating layer 24. The anti-adhesion layer 21 is disposed on the surface of the display module 1; the second substrate layer 22 is disposed on the surface of the anti-adhesion layer 21; the second shadow elimination hardening layer 23 is disposed on the surface of the second substrate layer 22; and the second ITO coating layer 24 is plated on the surface of the second shadow elimination hardening layer 23.

[0031] Among them, the thickness of the anti-adhesion layer 21 is between 2 μm and 3 μm. The thickness of the second substrate layer 22 is between 50 μm and 125 μm. The thickness of the second anti-shadow hardening layer 23 is between 2 μm and 3 μm. The thickness of the second ITO coating 24 is between 18 nm and 30 nm. In addition, the first substrate layer 33 and the second substrate layer 22 can be selected from PET (polyethylene terephthalate).

[0032] The present utility model will be further described below in conjunction with specific embodiments and comparative examples.

[0033] Comparative Example 1

[0034] The external touch screen structure includes a display module; a second ITO conductive film; a first ITO conductive film and a 1 mm cover glass, which are arranged in sequence from bottom to top.

[0035] Both the first ITO conductive film and the second ITO conductive film include an anti-adhesion layer with a thickness of 2 μm; a 50 μm PET layer; an anti-shadow hardening layer with a thickness of 2 μm and an ITO coating with a thickness of 18 nm, which are arranged from bottom to top.

[0036] Example 1

[0037] The external touch screen structure includes a display module 1; a second ITO conductive film 2; a first ITO conductive film 3, which are arranged in sequence from bottom to top.

[0038] The second ITO conductive film 2 includes an anti-adhesion layer with a thickness of 2 μm; a 50 μm second substrate layer 22; an anti-shadow hardening layer with a thickness of 2 μm and a second ITO coating with a thickness of 18 nm, which are arranged from bottom to top.

[0039] The first ITO conductive film 3 includes a first ITO coating 31 with a thickness of 18 nm; a first anti-shadow hardening layer 32 with a thickness of 2 μm; a 50 μm first substrate layer 33; a 3 μm functional layer 34: an anti-fouling layer.

[0040] Example 2

[0041] The external touch screen structure includes a display module 1; a second ITO conductive film 2; a first ITO conductive film 3, which are arranged in sequence from bottom to top.

[0042] The second ITO conductive film 2 includes an anti-adhesion layer 21 with a thickness of 2 μm; a 50 μm second substrate layer 22; an anti-shadow hardening layer with a thickness of 2 μm and a second ITO coating with a thickness of 18 nm, which are arranged from bottom to top.

[0043] The first ITO conductive film 3 includes a first ITO coating 31 with a thickness of 18 nm; a first anti-shadow hardening layer 32 with a thickness of 2 μm; a 50 μm first substrate layer 33; a 4 μm functional layer 34: an anti-glare hardening layer + an anti-fouling layer.

[0044] Example 3

[0045] The external-mounted touch screen structure includes a display module 1, a second ITO conductive film 2, and a first ITO conductive film 3, which are arranged in sequence from bottom to top.

[0046] The second ITO conductive film 2 includes, from bottom to top, a 2-μm anti-adhesion layer 21, a 50-μm second substrate layer 22, a 2-μm second anti-shadow hardening layer 23, and an 18-nm second ITO coating layer 24.

[0047] The first ITO conductive film 3 includes, from bottom to top, an 18-nm first ITO coating layer 31, a 2-μm first anti-shadow hardening layer 32, a 50-μm first substrate layer 33, and a 4-μm functional layer 34: an anti-reflection layer + an anti-fouling layer.

[0048] Example 4

[0049] The external-mounted touch screen structure includes a display module 1, a second ITO conductive film 2, and a first ITO conductive film 3, which are arranged in sequence from bottom to top.

[0050] The second ITO conductive film 2 includes, from bottom to top, a 2-μm anti-adhesion layer 21, a 50-μm second substrate layer 22, a 2-μm second anti-shadow hardening layer 23, and an 18-nm second ITO coating layer 24.

[0051] The first ITO conductive film 3 includes, from bottom to top, an 18-nm first ITO coating layer 31, a 2-μm first anti-shadow hardening layer 32, a 50-μm first substrate layer 33, and a 4-μm functional layer 34: an anti-glare hardening layer + an anti-reflection layer + an anti-fouling layer.

[0052] Hardness, abrasion resistance, anti-glare, anti-reflection, and anti-fingerprint tests were carried out on the external-mounted touch screen structures of Comparative Example 1 and Examples 1-4. The hardness was referred to the ASTM D3363 method and standard. The abrasion resistance test method was as follows: a 1000-g load was vertically applied to the test surface, the area of the test indenter was 2*2 cm, the surface texture of the steel wool was parallel to the friction direction (steel wool model: #0000, manufacturer: BonStar STEEL WOOL); the friction parameters were: a speed of 40 cycles / min, a test stroke of 40 mm, and 5000 cycles were set. The test results are shown in Table 1 below.

[0053] Table 1. Related test results of Comparative Example 1 and Examples 1-4

[0054] Hardness at 750g load Wear resistance of 1000g Anti-glare Anti-reflection Fingerprint-proof Touch screen thickness Comparative Example 1 8H 500 times NG × × × 1.5mm Example 1 4H 5000 times OK × × √ 0.16mm Example 2 4H 5000 times OK √ × √ 0.17mm Example 3 4H 5000 times OK × √ √ 0.17mm Example 4 4H 5000 times OK √ √ √ 0.17mm

[0055] In summary, the external touch screen structure of the present utility model adopts the first ITO conductive film 3, which can reduce the thickness of the external touch screen structure. By setting the functional layer 34, the external touch screen structure has one or more functions such as anti-glare, anti-reflection, and anti-fingerprint, and has better performance than the cover glass. In addition, the external touch screen adopts the above structure, with a simpler structure and lower maintenance and replacement costs.

[0056] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be construed as limiting the claimed rights.

[0057] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An external touch screen structure, characterized in that, It includes a display module, a second ITO conductive film, and a first ITO conductive film that are stacked in sequence from bottom to top, and the structures of the second ITO conductive film and the first ITO conductive film are different; Among them, the first ITO conductive film includes: A first ITO coating layer plated on the second ITO conductive film; A first shadow elimination and hardening layer coated on the surface of the first ITO coating layer; A first substrate layer disposed on the surface of the first shadow elimination and hardening layer; and A functional layer disposed on the surface of the first substrate layer.

2. The external touch screen structure according to claim 1, wherein, The functional layer is selected from one or more of an anti-glare hardening layer, an anti-reflection layer, and an anti-fouling layer; and / or, the thickness of the functional layer is between 3μm and 4μm.

3. The external touch screen structure according to claim 1, characterized in that, The thickness of the first ITO coating layer is between 18nm and 30nm.

4. The external touch screen structure according to claim 1, characterized in that The thickness of the first shadow elimination and hardening layer is between 2μm and 3μm.

5. The external touch screen structure according to claim 1, characterized in that, The thickness of the first substrate layer is between 50μm and 125μm.

6. The external touch screen structure according to claim 1, characterized in that, The second ITO conductive film includes: An anti-sticking layer disposed on the surface of the display module; A second substrate layer disposed on the surface of the anti-sticking layer; A second shadow elimination and hardening layer disposed on the surface of the second substrate layer; and A second ITO coating layer plated on the surface of the second shadow elimination and hardening layer.

7. The external touch screen structure according to claim 6, characterized in that, The thickness of the anti-sticking layer is between 2μm and 3μm.

8. The external touch screen structure according to claim 6, wherein The thickness of the second substrate layer is between 50μm and 125μm.

9. The external touch screen structure according to claim 6, wherein, The thickness of the second shadow elimination and hardening layer is between 2μm and 3μm.

10. The external touch screen structure according to claim 6, characterized in that, The thickness of the second ITO coating layer is between 18nm and 30nm.

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