Touch screen and display device

Abstract

The utility model relates to the technical field of touch screens, and discloses a touch screen and a display device. The touch screen provided by the utility model comprises a cover plate, an ink layer, an optical adhesive layer and a touch display module, the cover plate comprises an inner surface, the inner surface is provided with a display area and a frame area arranged around the display area, and the frame area comprises multiple straight parts and corner parts connected between the two straight parts; the ink layer is arranged on the inner surface and located in the frame area, and the thickness of the ink layer of the corner part is smaller than that of the ink layer of the straight part; the optical adhesive layer is arranged on one side of the cover plate and covers the ink layer and the display area on the inner surface; the touch display module is arranged on the side, away from the cover plate, of the optical adhesive layer. According to the touch screen provided by the invention, the technical problem that bubbles are easy to gather at corners of the touch screen in related technologies is solved.

Description

Technical Field

[0001] This application relates to the technical field of touchscreens, and particularly to a touchscreen and a display device. Background Art

[0002] The existing touchscreen includes a cover plate structure, on the inner surface of which a light-shielding ink layer and an optical adhesive layer are sequentially provided. During the lamination process of the touchscreen, the stress concentration at the corner positions is relatively large, and air bubbles are likely to be generated. Moreover, due to the large height difference between the optical adhesive layer and the light-shielding ink layer, the air bubbles cannot be discharged smoothly, resulting in a large number of air bubbles accumulating at the corner positions of the touchscreen, which affects the product quality of the touchscreen. Summary of the Utility Model

[0003] The purpose of this application is to provide a touchscreen and a display device, which are used to solve the technical problem that air bubbles are likely to accumulate at the corners of the touchscreen in the related art.

[0004] An embodiment of the first aspect of this application provides a touchscreen, including: a cover plate, including an inner surface, the inner surface having a display area and a border area disposed around the display area, the border area including multiple straight portions and corner portions connecting between two straight portions; an ink layer, disposed on the inner surface and located in the border area, the thickness of the ink layer at the corner portions being less than the thickness of the ink layer at the straight portions; an optical adhesive layer, disposed on one side of the cover plate, the optical adhesive layer covering the ink layer and the display area of the inner surface; and a touch display module, disposed on the side of the optical adhesive layer away from the cover plate.

[0005] In some embodiments, the ink layer includes a bottom ink layer and a top ink layer, the bottom ink layer is disposed on the inner surface, the top ink layer is disposed on the side of the bottom ink layer away from the cover plate, and the top ink layer has a slot at the corner portions, and the optical adhesive layer can be filled in the slot.

[0006] In some embodiments, the length of the slot in the first direction is 2 mm - 6 mm, and / or the length of the slot in the second direction is 2 mm - 6 mm, where the first direction and the second direction are the extending directions of two straight portions adjacent to the corner portion respectively.

[0007] In some embodiments, the thickness of the bottom ink layer is 1.6 μm - 2 μm, and / or the thickness of the top ink layer is 5 μm - 9 μm.

[0008] In some embodiments, the distance between the projection of the inner edge of the top ink layer on the bottom ink layer and the inner edge of the bottom ink layer is 0.8 mm - 0.9 mm.

[0009] In some embodiments, the distance between the projection of the outer edge of the bottom ink layer on the cover plate and the outer edge of the cover plate is 0.3 mm - 0.35 mm, and / or the projection of the outer edge of the top ink layer on the cover plate coincides with the outer edge of the cover plate.

[0010] In some embodiments, the ink layer has a groove at the corner. The groove has a first notch and a second notch that communicate with each other. The first notch is located on the surface of the ink layer facing away from the cover plate, and the second notch is located on the surface of the ink layer facing the display area. The optical adhesive layer can be filled in the groove.

[0011] In some embodiments, the thickness of the ink layer at the corner is 1.6 μm - 2 μm.

[0012] In some embodiments, the length of the groove in the first direction is 2 mm - 6 mm, and / or the length of the groove in the second direction is 2 mm - 6 mm, where the first direction and the second direction are the extending directions of two straight portions adjacent to the corner respectively.

[0013] The touch screen provided by the embodiments of the present application can reduce the height difference between the optical adhesive layer and the ink layer at the corner by reducing the thickness of the ink layer at the corner, so that the bubbles generated by pressing between the optical adhesive layer and the cover plate can be smoothly discharged from the corner, solving the problem that bubbles are likely to accumulate at the corners of the touch screen in the related art. And because the accumulation of bubbles is reduced, the optical adhesive layer and the cover plate are more closely attached and the bonding strength is improved. When performing a peel force test or product assembly later, the peeling risk of the optical adhesive layer can also be reduced.

[0014] An embodiment of the second aspect of the present application provides a display device, including the touch screen in the first aspect.

[0015] The display device provided by the embodiments of the present application improves the interlayer structure of the touch screen. Specifically, by reducing the thickness of the ink layer at the corner of the cover plate, the height difference between the optical adhesive layer and the ink layer at the corner is reduced, solving the technical problem that bubbles are likely to accumulate at the corners of the touch screen in the related art, thereby improving the product quality of the touch screen and related display devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. 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 a schematic structural diagram of the cover plate in the touch screen provided by the embodiments of the present application;

[0018] Figure 2 It is a schematic diagram of the interlayer structure of the touch screen provided by the embodiments of the present application;

[0019] Figure 3Schematic diagram of the structure of the top ink covering the corner part in the touch screen provided by the embodiment of the present application;

[0020] Figure 4 Schematic diagram of the structure of the ink layer and the optical adhesive layer covering the corner part in the touch screen provided by the embodiment of the present application.

[0021] Description of main component symbols:

[0022] 100, touch screen;

[0023] 1, cover plate; 11, display area; 12, border area; 121, straight part; 122, corner part; 2, ink layer; 21, bottom ink; 22, top ink; 23, slot; 231, first extension segment; 232, second extension segment; 3, optical adhesive layer; 4, touch display module. Detailed implementation manners

[0024] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0025] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly or indirectly disposed on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component. The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of 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 thus cannot be construed as a limitation of the patent. Terms "first" and "second" are only used for the purpose of convenient description, and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of technical features. The meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0026] Referring to "one embodiment", "some embodiments" or "embodiments" in the description of the present application means that specific features, structures or characteristics described in combination with the embodiment are included in one or more embodiments of the present application. Thus, the statements "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc. appearing in different places in this specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. In addition, in one or more embodiments, specific features, structures or characteristics can be combined in any suitable manner.

[0027] In a first aspect, please refer to Figure 1 and Figure 2 . An embodiment of the present application provides a touch screen 100, which includes a cover plate 1, an ink layer 2, an optical adhesive layer 3, and a touch display module 4. The cover plate 1 includes an inner surface, and the inner surface has a display area 11 and a border area 12 disposed around the display area 11. The border area 12 includes multiple straight portions 121 and corner portions 122 connected between two straight portions 121. The ink layer 2 is disposed on the inner surface and located in the border area 12, and the thickness of the ink layer 2 at the corner portion 122 is less than the thickness of the ink layer 2 at the straight portion 121. The optical adhesive layer 3 is disposed on one side of the cover plate 1, and the optical adhesive layer 3 covers the ink layer 2 and the display area 11 of the inner surface. The touch display module 4 is disposed on the side of the optical adhesive layer 3 away from the cover plate 1.

[0028] Please refer to Figure 1 . The direction shown by X is the length direction of the cover plate 1, the direction shown by Y is the width direction of the cover plate 1, and please refer to Figure 2 . The direction shown by Z is the thickness direction of the cover plate 1.

[0029] The cover plate 1 is an outer protective structure of the touch screen 100, which is used to provide necessary physical protection for internal components. The cover plate 1 is generally made of a transparent material with high hardness, scratch resistance, and impact resistance. For example, the cover plate 1 can be a glass cover plate. The cover plate 1 has opposite inner and outer surfaces, and the inner surface can be divided into a display area 11 and a border area 12. The display area 11 is used to display images and content, and the display area 11 is directly opposite to the display area of the touch display module 4. In this area, users can directly perform touch operations. The border area 12 is also the edge area of the cover plate 1, which is used to connect to the chassis. The structure of the border area 12 depends on the structure of the cover plate 1 and the shape of the display area 11. In the embodiment provided by the present application, the border area 12 includes straight portions 121 and corner portions 122. The straight portion 121 can be understood as a straight section of the cover plate 1 in the length direction X or the width direction Y, and the corner portion 122 can be understood as the corner of the cover plate 1. For example, when the cover plate 1 is a square panel, the corner portion 122 is the four corner areas of the cover plate 1.

[0030] The ink layer 2 has good light-shielding performance and sealing performance, which is used to reduce screen light leakage and prevent moisture, dust, or other contaminants from entering. Alternatively, the ink layer 2 can also be used to print specific circuit patterns or arrange electronic devices. The ink layer 2 is disposed around the edge of the inner surface of the cover plate 1. The thickness of the ink layer 2 covered on several straight portions 121 in the border area 12 is the same, while the thickness of the ink layer 2 covered on the corner portion 122 is thinned. The ink layer 2 can be made on the cover plate 1 by means of screen printing, inkjet printing, etc. The thickness of the ink layer 2 depends on the ink amount, printing process, printing parameters, etc.

[0031] The optical adhesive layer 3 is a double-sided adhesive film used to connect the cover plate 1 and the touch display module 4 so that the two are firmly combined together. The thickness of the optical adhesive layer 3 is greater than that of the ink layer 2. The optical adhesive layer 3 partially fills the surface of the display area 11 surrounded by the ink layer 2 and partially covers the surface of the ink layer 2. It can be understood that the optical adhesive usually has a certain fluidity in the initial state. During the subsequent lamination process, the optical adhesive can be evenly distributed and fill the uneven areas on the inner surface side of the cover plate 1 to form a flat optical adhesive layer 3. In the embodiment provided in the present application, the thickness of the optical adhesive layer 3 at the corner portion 122 is thicker to compensate for the reduced thickness of the ink layer 2, so that the thickness of the touch screen 100 at each position meets the design requirements.

[0032] The touch display module 4 is used to detect the touch operation of the user and convert the touch signal into an electrical signal for output. The touch display module 4 is generally composed of structures such as an induction layer, a control component, and a substrate layer, and can adopt resistive, capacitive or other touch technologies.

[0033] It should be noted that Figures 1-4 It is only used to schematically show the structure of a partial position of the touch screen 100 provided in the embodiment of the present application, and is not used to limit the specific structure of the touch screen 100. For example Figure 2 The shown drawings are only used to schematically show the interlayer layout of the cover plate 1, the ink layer 2, the optical adhesive layer 3, and the touch display module 4.

[0034] The touch screen 100 provided in the embodiment of the present application includes a cover plate 1, an ink layer 2, an optical adhesive layer 3, and a touch display module 4. The ink layer 2 is disposed in the border area 12 of the cover plate 1, and the thickness of the ink layer 2 at the corner portion 122 is less than that at the straight portion 121. The optical adhesive layer 3 covers the ink layer 2 and the display area 11 on the inner surface of the cover plate 1. In this way, by reducing the thickness of the ink layer 2 at the corner portion 122, the height difference between the optical adhesive layer 3 and the ink layer 2 at the corner portion 122 can be reduced, so that the bubbles generated by lamination between the optical adhesive layer 3 and the cover plate 1 can be smoothly discharged from the corner portion 122, solving the problem that bubbles are likely to accumulate at the corners of the touch screen 100 in the related art. And due to the reduction of bubble accumulation, the optical adhesive layer 3 and the cover plate 1 are more closely bonded and the bonding strength is improved. When performing a peel force test or product assembly later, the peeling risk of the optical adhesive layer 3 can also be reduced.

[0035] In some embodiments, please refer to Figure 2 、 Figure 3 and Figure 4 , the ink layer 2 includes a bottom ink layer 21 and a top ink layer 22. The bottom ink layer 21 is disposed on the inner surface, and the top ink layer 22 is disposed on the side of the bottom ink layer 21 away from the cover plate 1. The top ink layer 22 has a slot 23 at the corner portion 122, and the optical adhesive layer 3 can fill the slot 23.

[0036] It should be noted that Figure 4 The top layer ink 22 is made in the areas shown by a and b. At the areas of a and b, the optical adhesive layer 3 covers above the top layer ink 22, while at the area of the slot 23, the optical adhesive layer 3 covers above the bottom layer ink 21.

[0037] The bottom layer ink 21 is directly made on the inner surface of the cover plate 1 by means of screen printing or spraying, etc. The bottom layer ink 21 is generally used to define the shape of the product and provide necessary light-shielding or conductive functions. After the bottom layer ink 21 is dried and formed, the top layer ink 22 is made on the surface of the bottom layer ink 21 by means of screen printing, spraying or other printing techniques with higher precision. The top layer ink 22 is generally used to increase the light-shielding effect, improve the electrostatic protection, and can also be used to form specific patterns or functional layers.

[0038] Optionally, in the thickness direction of the top layer ink 22, the slot 23 penetrates through the top layer ink 22. The slot 23 includes a first opening facing the touch display module 4 and a second opening facing the display area 11, and the first opening and the second opening are communicated. On the one hand, the slot 23 has the function of thinning the thickness of the ink layer 2. At the position of the slot 23, the height difference between the optical adhesive layer 3 and the ink layer 2 is equivalent to the thickness of the bottom layer ink 21. At the position outside the slot 23, the height difference between the optical adhesive layer 3 and the ink layer 2 is equivalent to the overall thickness of the bottom layer ink 21 and the top layer ink 22. The optical adhesive layer 3 covers on the surfaces of the top layer ink 22 and the bottom layer ink 21 to form an extended stepped platform, and this structure is more conducive to the discharge of air bubbles. On the other hand, the slot 23 provides a filling space. During the lamination process, the optical adhesive can flow into and fill the slot 23, thereby releasing part of the pressure, and this can also reduce the formation of air bubbles at the corner part 122.

[0039] It can be understood that in some cases, the ink layer 2 can also be designed as a single-layer structure. By controlling the ink amount, adjusting the printing parameters, etc., an ink layer 2 with a uniformly thinned thickness can be made.

[0040] In some embodiments, the length of the slot 23 in the first direction is 2 mm - 6 mm, and / or the length of the slot 23 in the second direction is 2 mm - 6 mm, where the first direction and the second direction are respectively the extending directions of two straight parts 121 adjacent to the corner part 122.

[0041] Define the length direction X of the cover plate 1 as the first direction, and the width direction Y of the cover plate 1 as the second direction. The length of the cover plate 1 is not less than the width of the cover plate 1.

[0042] Please refer to Figure 3, the slot 23 includes a first extension section 231 and a second extension section 232, where the first extension section 231 extends along a first direction, and the second extension section 232 extends along a second direction. The extension length of the first extension section 231 in the first direction is 2 mm - 6 mm, and the extension length of the second extension section 232 in the second direction is 2 mm - 6 mm.

[0043] If the size of the slot 23 is too small, the slot 23 cannot cover the corner portion 122, which will cause the air bubbles to not be discharged smoothly; if the size of the slot 23 is too large, it will affect the structure of the ink layer 2, resulting in a decrease in the light-shielding performance and sealing performance of the ink layer 2. In the above embodiments, the size of the slot 23 is reasonable, which can balance the exhaust requirements and the design requirements of the ink layer 2. In addition, the slot 23 extends in different directions, which can also guide the stress to disperse along different paths towards the slot 23, facilitating the alleviation of the stress concentration problem at the corner portion 122.

[0044] It can be understood that in some embodiments, the slot 23 can also be designed as a square, triangular or other shaped structure.

[0045] In some embodiments, the thickness of the bottom ink layer 21 is 1.6 μm - 2 μm, and / or the thickness of the top ink layer 22 is 5 μm - 9 μm. For example, the thickness of the bottom ink layer 21 can be 1.6 μm, 1.8 μm, 2 μm; the thickness of the top ink layer 22 can be 5 μm, 6 μm, 7 μm, 8 μm, 9 μm.

[0046] Optionally, in some embodiments, the depth of the slot 23 is the same as the thickness of the top ink layer 22, and the depth of the slot 23 is 5 μm - 9 μm.

[0047] By defining the thicknesses of the bottom ink layer 21 and the top ink layer 22, the depth of the slot 23 and the thickness of the ink layer 2 at the corner portion 122 can be controlled within a reasonable range, which is beneficial to improving the exhaust effect at the corner portion 122 and enabling the ink layer 2 to have good light-shielding performance and sealing performance. In addition, the bottom ink layer 21 is designed as a thin layer structure to meet the basic light-shielding and conductive requirements, while the thickness of the top ink layer 22 is increased to provide reliable protection for the circuits or components in the ink layer 2.

[0048] In some embodiments, the distance between the projection of the inner edge of the top ink layer 22 on the bottom ink layer 21 and the inner edge of the bottom ink layer 21 is 0.8 mm - 0.9 mm. For example, the distance between the projection of the inner edge of the top ink layer 22 on the bottom ink layer 21 and the inner edge of the bottom ink layer 21 can be 0.8 mm, 0.85 mm, 0.9 mm.

[0049] Optionally, in a specific embodiment, the inner edge of the top ink layer 22 is retracted 0.85 mm compared to the inner edge of the bottom ink layer 21.

[0050] With the above design, on the side facing the display area 11, the bottom ink layer 21 and the top ink layer 22 can form a stepped structure, which is beneficial to improving the sealing performance between the optical adhesive layer 3 and the ink layer 2 and reducing the risk of intrusion of pollutants such as moisture and dust.

[0051] It can be understood that in some embodiments, the inner edges of the bottom ink layer 21 and the top ink layer 22 can also be flush.

[0052] In some embodiments, the distance between the projection of the outer edge of the bottom ink layer 21 on the cover plate 1 and the outer edge of the cover plate 1 is 0.3 mm - 0.35 mm, and / or the projection of the outer edge of the top ink layer 22 on the cover plate 1 coincides with the outer edge of the cover plate 1. For example, the distance between the projection of the outer edge of the bottom ink layer 21 on the cover plate 1 and the outer edge of the cover plate 1 can be 0.3 mm, 0.31 mm, 0.32 mm, 0.33 mm, 0.34 mm, 0.35 mm.

[0053] There is a blank area between the outer edge of the bottom ink layer 21 and the cover plate 1, which can better define the product shape and prevent the bottom ink layer 21 from overflowing the cover plate 1.

[0054] In some cases, the top ink layer 22 at the corner portion 122 is provided with a slot 23. After the optical adhesive overflows into the slot 23, the distance between the outer edge of the optical adhesive layer 3 and the top ink layer 22 is shortened. By expanding the coverage of the top ink layer 22, the sealing performance between the optical adhesive layer 3 and the ink layer 2 can be improved, and the risk of intrusion of pollutants such as moisture and dust can be reduced.

[0055] In some embodiments, the top ink layer 22 is made of high-dyne-value ink, which helps to improve the bonding effect between the ink layer 2 and the optical adhesive layer 3 and further reduce the peeling risk of each layer structure of the touch screen 100.

[0056] In some embodiments, the ink layer 2 has a groove at the corner portion 122. The groove has a first notch and a second notch that are connected. The first notch is located on the surface of the ink layer 2 facing away from the cover plate 1, and the second notch is located on the surface of the ink layer 2 facing the display area 11. The optical adhesive layer 3 can be filled in the groove.

[0057] The ink layer 2 is a single-layer structure. A groove is provided on the side of the ink layer 2 facing the touch display module 4, and the groove is located at the corner portion 122.

[0058] With the above design, it is beneficial to simplify the manufacturing process of the touch screen 100, thereby reducing the manufacturing cost of the ink layer 2.

[0059] In some embodiments, the thickness of the ink layer 2 at the corner portion 122 is 1.6 μm - 2 μm. For example, the thickness of the ink layer 2 at the corner portion 122 can be 1.6 μm, 1.8 μm, or 2 μm.

[0060] With the above design, the height difference between the optical adhesive layer 3 and the ink layer 2 at the corner portion 122 can be controlled within a reasonable range to ensure that air bubbles can be smoothly discharged from the corner portion 122. In addition, the reasonable thickness of the ink layer 2 at the corner portion 122 can ensure the light-shielding performance and sealing performance of the ink layer 2.

[0061] In some embodiments, the length of the groove in the first direction is 2 mm - 6 mm, and / or the length of the groove in the second direction is 2 mm - 6 mm, where the first direction and the second direction are the extension directions of two straight portions 121 adjacent to the corner portion 122 respectively.

[0062] The groove includes a first segment and a second segment, where the first segment extends along the first direction and the second segment extends along the second direction. The extension length of the first segment in the first direction is 2 mm - 6 mm, and the extension length of the second segment in the second direction is 2 mm - 6 mm.

[0063] With the above design, the groove structure is reasonable, which can balance the exhaust requirements and the design requirements of the ink layer 2. In addition, the groove extends in different directions, which can also guide the stress to disperse along different paths towards the groove, facilitating the alleviation of the stress concentration problem at the corner portion 122.

[0064] It can be understood that in some embodiments, the groove can also be designed as a square, triangular or other shaped structure.

[0065] In some embodiments, a slot 23 or a groove structure is provided in the ink layer 2 at the corner portion 122. After the optical adhesive is filled in the slot 23 or the groove, the distance between the edge of the optical adhesive layer 3 and the groove wall is 0.5 mm. This gap design structure is more conducive to the discharge of air bubbles at the corner portion 122.

[0066] In some embodiments, the thickness of the optical adhesive layer 3 is 150 μm - 200 μm. For example, the thickness of the optical adhesive layer 3 can be 150 μm, 180 μm, or 200 μm.

[0067] The above design of the thickness of the optical adhesive layer 3 is reasonable. The optical adhesive layer 3 has sufficient physical strength to bond the cover plate 1, the ink layer 2, and the touch display module 4 to form a stable interlayer structure, and the optical adhesive layer 3 has good light transmittance, with less loss when light passes through.

[0068] In summary, for the touch screen 100 provided in this application, by reducing the thickness of the ink layer 2 at the corner portion 122 of the cover plate 1, the height difference between the optical adhesive layer 3 and the ink layer 2 at the corner portion 122 is reduced, thereby solving the technical problem that air bubbles are likely to accumulate at the corners of the touch screen 100 in the related art.

[0069] In a second aspect, an embodiment of this application provides a display device, including the touch screen 100 in the first aspect.

[0070] The display device provided in the embodiment of this application improves the interlayer structure of the touch screen 100. Specifically, by reducing the thickness of the ink layer 2 at the corner portion 122 of the cover plate 1, the height difference between the optical adhesive layer 3 and the ink layer 2 at the corner portion 122 is reduced, solving the technical problem that air bubbles are likely to accumulate at the corners of the touch screen 100 in the related art, thereby improving the product quality of the touch screen 100 and related display devices.

[0071] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them; although this application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included in the protection scope of this application.

Claims

1. A touch screen, characterized in that: include: The cover plate comprises an inner surface, wherein the inner surface has a display area and a frame area arranged around the display area, wherein the frame area comprises a plurality of straight portions and a corner portion connected between two straight portions; An ink layer is disposed on the inner surface and located in the frame area, wherein the thickness of the ink layer at the corner portion is less than the thickness of the ink layer at the straight portion; An optical adhesive layer, disposed on one side of the cover plate, the optical adhesive layer covers the ink layer and the display area of ​​the inner surface; The touch display module is arranged on a side of the optical adhesive layer away from the cover plate.

2. The touch screen according to claim 1, characterized in that: The ink layer includes a bottom ink and a top ink, the bottom ink is arranged on the inner surface, the top ink is arranged on a side of the bottom ink away from the cover plate, the top ink has a groove at the corner, and the optical adhesive layer can be filled in the groove.

3. The touch screen according to claim 2, characterized in that: The length of the slot in the first direction is 2 mm-6 mm, and / or the length of the slot in the second direction is 2 mm-6 mm, wherein the first direction and the second direction are respectively the extension directions of the two sections of the straight portions adjacent to the corner portion.

4. The touch screen according to claim 2, characterized in that: The thickness of the bottom layer ink is 1.6 μm-2 μm, and / or the thickness of the top layer ink is 5 μm-9 μm.

5. The touch screen according to claim 2, characterized in that: The distance between the projection of the inner edge of the top layer of ink on the bottom layer of ink and the inner edge of the bottom layer of ink is 0.8 mm-0.9 mm.

6. The touch screen according to claim 2, characterized in that: The projection of the outer edge of the bottom ink on the cover plate is 0.3mm-0.35mm away from the outer edge of the cover plate, and / or the projection of the outer edge of the top ink on the cover plate coincides with the outer edge of the cover plate.

7. The touch screen according to claim 1, wherein: The ink layer has a groove at the corner portion, and the groove has a first groove and a second groove that are connected. The first groove is located on the surface of the ink layer away from the cover plate, and the second groove is located on the surface of the ink layer facing the display area. The optical adhesive layer can be filled in the groove.

8. The touch screen according to claim 7, wherein: The thickness of the ink layer at the corner portion is 1.6 μm-2 μm.

9. The touch screen according to claim 7, characterized in that: The length of the groove in the first direction is 2 mm-6 mm, and / or the length of the groove in the second direction is 2 mm-6 mm, wherein the first direction and the second direction are respectively the extension directions of the two sections of the straight portions adjacent to the corner portion.

10. A display device, characterized in that: The invention comprises a touch screen as claimed in any one of claims 1 to 9.

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