Touch screen and touch display screen

Abstract

The present invention provides a touch screen and a touch display screen, wherein the touch screen includes, from top to bottom, a first substrate, a touch electrode layer, a photolithography ink layer, a hard film layer, and a silk screen ink layer. A hard film layer is arranged between the photolithography ink layer and the silk screen ink layer, and the hard film layer can protect the BM1 with a lower surface hardness from being scratched by subsequent processes. At the same time, the hard film layer has good durability and reliability with the photolithography ink layer and the silk screen ink layer, forming a good adhesion and bonding effect, which can improve the blackening effect and production yield of the product.

Description

Technical Field

[0001] The present invention belongs to the field of flat panel display technology, and in particular to the field of touch display technology, and specifically relates to a touch screen and a touch display screen. Background Art

[0002] With the rapid development of technology in recent years, smart electronic products such as mobile phones, tablet computers, laptops, smart TVs, etc. have become an indispensable part of people's daily lives. As a simple and convenient way of human-computer interaction, touch screens have been widely used in electronic equipment and vehicle-mounted equipment.

[0003] At present, the photolithographic properties of photoresist are often used to perform photolithography, exposure and development on the first substrate of the touch screen. The stacking layers of common touch screen cover plates are from top to bottom: first substrate, photoresist, BM2 (silk screen ink), and the BM2 is black opaque silk screen ink. With the advancement of photoresist technology, a new type of black photoresist has emerged, which can also be called BM1 (photolithography ink). The BM1 has multiple effects such as being photolithographic, blocking light transmission and being a sticky medium. Theoretically speaking, the emergence of the above-mentioned BM1 can transform the stacking form of the first substrate, photoresist, and BM2 of the traditional touch screen cover plate into the form of the first substrate and BM1, thereby saving raw materials, reducing the load thickness of the first substrate, and improving the blackening effect of the product appearance.

[0004] However, due to the poor durability and reliability of BM1, when BM1 is bonded with subsequent modules, the adhesion of subsequent modules on BM1 is poor. Therefore, BM1 is currently used as the first substrate for photolithography and bonding medium. After BM1 is made on the first substrate, BM2 is still made on BM1 by screen printing. At this time, the stacking form of the touch screen cover is the first substrate, BM1, and BM2 from top to bottom. This stacking form improves the blackening optical performance of the cover, but the adhesion performance between BM1 and BM2 is still not ideal, and a stable and tight bonding effect cannot be achieved between BM1 and BM2. At the same time, the surface hardness of BM1 is low, with a surface hardness of about 2H pencil hardness, which makes it very easy to scratch BM1 during the silk-screen production of BM2 and other subsequent processes, reducing the product yield.

[0005] In view of the above problems, it is necessary to develop a touch screen and touch display screen that can improve the blackening effect while ensuring the product yield. Summary of the invention

[0006] In view of the above problems, the present invention provides a touch screen and a touch display screen which can improve the blackening effect and ensure the product yield.

[0007] In order to achieve the above technical objectives, the touch screen provided by the present invention includes, from top to bottom, a first substrate, a touch electrode layer, a photolithography ink layer, an IM2 (hard film layer) and a silk-screen ink layer, wherein the photolithography ink layer is composed of BM1 projected to cover the edges of the first substrate, and the silk-screen ink layer is also composed of BM2 projected to cover the edges of the first substrate. From the observation surface of the touch screen, the area on the first substrate that is not covered by the projection of BM1 and BM2 is the VA area (visible area), and the area on the first substrate that is covered by the projection of BM1 or BM2 is the BM area (invisible area). The projection coverage area of ​​the hard film layer is at least but not limited to the area covered by the projection of the photolithography ink layer. The touch electrode layer is composed of one or more materials selected from materials such as ITO film, nano silver wire, copper-containing metal grid, graphene, and carbon nanotube structure.

[0008] The IM2 is TiO X 、SiN X 、SiON X , Nb2O5, SiO, SiO2, MgF and other materials, the IM2 can be made on the BM1 by evaporation, coating, sputtering, and TiO X 、SiN X 、SiON X IM2 composed of one or more materials of Nb2O5, SiO, SiO2, and MgF has good durability and reliability with BM1, and the combination of IM2 and BM1 has good adhesion. The IM2 film layer obtained by evaporation or sputtering has better performance such as yield rate and adhesion stability, and the adhesion can reach more than 5B.

[0009] The present invention further provides a touch display screen, which comprises, from bottom to top, a touch module composed of the above touch screen, a first adhesive layer, a polarizer, a second adhesive layer and a display module. The touch electrode layer 17 is disposed on the lower surface of the first substrate.

[0010] In other technical solutions, another touch display screen is provided, which includes, from bottom to top, a second substrate, a first bonding layer, a touch module consisting of the above touch screen, a second bonding layer, a polarizer, a third bonding layer and a display module. The touch module includes a first substrate, and the touch electrode layer 17 is arranged on the upper surface of the first substrate.

[0011] The first substrate and the second substrate are light-transmitting and can be made of one or more materials such as glass, polyolefin substrate, polycarbonate substrate, polyacrylate substrate, PET film (high temperature resistant polyester film), aromatic polyether ketone substrate, polyether sulfone substrate, PI film (polyimide), etc.

[0012] In a preferred technical solution, the first substrate and the second substrate are glass, PI film (polyimide) or PET film (high temperature resistant polyester film).

[0013] The present invention provides a touch screen and a touch display screen, in which an IM2 film layer is arranged between BM1 and BM2, and the IM2 film layer can protect the BM1 with lower surface hardness from being scratched in subsequent processes. At the same time, the IM2 film layer has good durability and reliability with BM1 and BM2, forming a good adhesion and bonding effect, which can improve the blackening effect and production yield of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a first structural schematic diagram of the touch screen of the present invention;

[0015] Figure 2 is a second structural schematic diagram of the touch screen of the present invention;

[0016] Figure 3 is a third structural schematic diagram of the touch screen of the present invention;

[0017] Figure 4 is a fourth structural schematic diagram of the touch screen of the present invention;

[0018] Figure 5 is a first structural schematic diagram of a touch display screen of the present invention;

[0019] Figure 6 It is a second structural schematic diagram of the touch display screen of the present invention.

[0020] Reference numerals:

[0021] 1—touch module, 2—first adhesive layer, 3—polarizer, 4—second adhesive layer, 5—third adhesive layer, 6—display module;

[0022] 11—first substrate, 12—photolithography ink layer, 13—hard film layer, 14—silk screen ink layer, 15—optical film layer, 16—blackened film layer, 17—touch electrode layer. DETAILED DESCRIPTION

[0023] In order to clearly illustrate the touch screen and touch display screen provided by the present invention, they are described in detail below in conjunction with the accompanying drawings and textual descriptions of the embodiments.

[0024] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] like Figure 1 As shown, in order to achieve the above technical objectives, the touch screen provided by the present invention includes, from top to bottom, a first substrate 11, a touch electrode layer 17, a photolithography ink layer 12, a hard film layer 13, and a silk-screen ink layer 14. The photolithography ink layer 12 is composed of BM1 projected to cover the edge areas around the first substrate 11, and the silk-screen ink layer 14 is also composed of BM2 projected to cover the edge areas around the first substrate 11. The area covered by the projection of the hard film layer is at least but not limited to the area covered by the projection of the photolithography ink layer. The thickness of the hard film layer 13 is 10-400nm.

[0026] In the preferred technical solution, the hard film layer 13 is a multi-layer composite film layer of SiO2 and Nb2O5 materials alternately stacked. At this time, the hard film layer 13 is very dense, which can effectively block the destructive effect of water vapor on BM1 and improve the weather resistance of the product. At the same time, the hardness of the hard film layer 13 is 5H-6H in pencil hardness, which can effectively protect BM1 from being scratched during subsequent processes such as blue film screen printing, cutting, and BM2 screen printing, thereby improving the support yield.

[0027] The first substrate 11 is divided into an opaque area (or BM area) and a translucent area (or VA area) for displaying images. The projection coverage area formed by the photolithography ink layer 12 and the silk-screen ink layer 14 on the first substrate 11 is the opaque area, and the other areas on the first substrate 11 are VA areas.

[0028] Since the first substrate 11 is divided into an opaque area covered by the projection of the photolithography ink layer 12 or the silk-screen ink layer 14 and a VA area for displaying an image, the optical effects occurring in each area are different, and it is difficult to meet optical uniformity requirements, such as color index requirements such as integral black.

[0029] In response to the above problems, Figure 2As shown, the first substrate 11 has a touch surface or an observation surface, and the touch surface is on the side of the first substrate 11 away from the touch electrode layer 17. Usually, the touch surface or the observation surface of the first substrate 11 is optically processed, for example, an optical film layer 15 is provided by surface coating or optical film affixing. The optical film layer 15 can be an anti-shadow film, or an AR film (anti-reflection film), an AG film (anti-glare film) and an AF film (anti-fingerprint film).

[0030] The AR (anti-reflection film) can be made of high refractive index material TiO X A composite film is formed by alternately and cyclically coating single or mixed material film layers of ZrO2, Si3N4, Ta2O5, Nb2O5 and single or mixed material film layers of low refractive index materials SiO, SiO2, MgF2, MgO, etc. on the first substrate. The composite film has the functions of filtering blue light and reducing reflection, and also has a certain shadow elimination effect, which can appropriately improve the optical uniformity of the surface of the first substrate 11.

[0031] However, this treatment method of surface coating or optical film affixing on the touch surface or observation surface of the first substrate 11 affects both the light-transmitting area and the non-light-transmitting area. Since the lower side of the first substrate is divided into a light-transmitting area composed of a photolithography ink layer 12 or a silk-screen ink layer 14 and a VA area for displaying an image, the optical effects occurring in each area are different in themselves. Optical treatment on the touch surface and observation surface of the first substrate still makes it difficult to meet the optical uniformity requirements, such as color index requirements such as integrated black, and will significantly affect the display experience of the touch surface or observation surface.

[0032] In order to solve the problem of integrated black or optical uniformity, Figure 3 As shown, optical adjustment can be performed directly on the hard film layer 13 on the inner side of the first substrate 11, and a black film layer 16 is provided on the side of the hard film layer 13 away from the first substrate 11. The black film layer 16 can be an image elimination film, an AR film, or a composite film of an image elimination film and an AG film, or a composite film of an image elimination film and an AF film.

[0033] By providing the blackened film layer 16, when observed from the touch surface and the observation surface, the opaque area formed by the photolithography ink layer 12 or the silk-screen ink layer 14 and the VA area displaying the image are both opaque black, so that the product achieves a better uniform integrated black appearance effect.

[0034] When the VA area displays an image, the light source on the lower side of the first substrate 11 can still have sufficient and effective light passing through the blackened film layer 16 of the VA area, thereby meeting the visual experience requirements.

[0035] like Figure 4As shown, on the hard film layer 13 on the inner side of the first substrate 11, only the area projected and covered in the light-transmitting area is optically adjusted separately, and a blackening film layer 16 with a blackening effect is provided on the side of the hard film layer 13 away from the first substrate 11, so that the product achieves the best appearance effect such as one-piece black. In other embodiments, the optical treatment on the touch surface and the observation surface of the first substrate 11 can also be combined, such as providing an AR film, an AG film, and an AF film, etc. to improve the optical performance of the product in various aspects.

[0036] like Figure 5 As shown, the present invention further provides a touch display screen, which includes, from bottom to top, a touch module 1 composed of the above touch screen, a first adhesive layer 2, a polarizer 3, a second adhesive layer 4 and a display module 6.

[0037] like Figure 6 As shown, the present invention also provides another touch display screen, which includes, from bottom to top, a second substrate 7, a first bonding layer 2, a touch module 1 composed of the above touch screen, a second bonding layer 4, a polarizer 3, a third bonding layer 5 and a display module 6.

[0038] The above are preferred embodiments of the touch screen and touch display provided by the present invention, and should not be understood as limiting the scope of protection of the present invention. Those skilled in the art should know that, in the absence of conflict, the above embodiments and features in the embodiments may be combined with each other, and various improvements or replacements may be made without departing from the concept of the present invention. All improvements or replacements should be within the scope of protection of the present invention, that is, the scope of protection of the present invention should be based on the claims.

Claims

1. A touch screen, comprising, from top to bottom, a first substrate (11), a touch electrode layer (17), a photolithography ink layer (12), a hard film layer (13), and a silk-screen ink layer (14), characterized in that: The projections of the photolithography ink layer (12) and the silk-screen ink layer (14) cover the peripheral edge areas of the first substrate (11); the area covered by the projection of the hard film layer (13) is at least, but not limited to, the area covered by the projection of the photolithography ink layer; and the thickness of the hard film layer (13) is 10-400 nm; The first substrate (11) is divided into a light-proof area and a light-transmitting area, the projection coverage area formed by the photolithography ink layer (12) and the silk-screen ink layer (14) on the first substrate (11) is the light-proof area, and the other areas on the first substrate (11) are light-transmitting areas; The hard film layer (13) is TiO x 、SiN x 、SiON x A single-layer material film layer or a multi-layer material combination film layer composed of one or more materials selected from the group consisting of Nb2O5, SiO, SiO2, and MgF; The first substrate (11) has a touch surface or an observation surface on a side away from the touch electrode layer (17), and an optical film layer (15) is arranged on the touch surface of the first substrate (11), and the optical film layer (15) is an image elimination film, an AR film, an AG film, or an AF film; A blackened film layer (16) is also provided on a side of the hard film layer (13) away from the first substrate (11), and the projection of the blackened film layer (16) only covers the light-transmitting area.

2. The touch screen according to claim 1, characterized in that: The touch electrode layer (17) is composed of an ITO film, nano silver wires, a copper-containing metal grid, graphene, or a carbon nanotube structure.

3. A touch display screen, comprising, from bottom to top, a touch module (1) consisting of the touch screen according to claim 1, a first adhesive layer (2), a polarizer (3), a second adhesive layer (4) and a display module (6).

4. The touch display screen according to claim 3, characterized in that: The first substrate is light-transmissive and is made of one or more materials selected from the group consisting of glass, polyolefin substrate, polycarbonate substrate, polyacrylate substrate, high-temperature resistant polyester film, aromatic polyether ketone substrate, polyether sulfone substrate, and polyimide.

5. A touch display screen, comprising, from bottom to top, a second substrate (7), a first adhesive layer (2), a touch module (1) consisting of the touch screen according to claim 1, a second adhesive layer (4), a polarizer (3), a third adhesive layer (5) and a display module (6).

6. The touch display screen according to claim 5, characterized in that: The second substrate is light-transmissive and is made of one or more materials selected from the group consisting of glass, polyolefin substrate, polycarbonate substrate, polyacrylate substrate, high-temperature resistant polyester film, aromatic polyether ketone substrate, polyether sulfone substrate, and polyimide.

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