Glass cover plate and display screen

Abstract

The invention relates to the technical field of display, in particular to a glass cover plate and a display screen. The glass cover plate comprises a glass substrate; the anti-reflection film layer is arranged on one side of the glass substrate, and the thickness of the anti-reflection film layer is larger than or equal to 80 nm and smaller than or equal to 138 nm; the antireflection film layer comprises a plurality of low-refractive-index film layers and a plurality of high-refractive-index film layers, the low-refractive-index film layers and the high-refractive-index film layers are alternately stacked, the refractive index n1 of the low-refractive-index film layers at 550nm is greater than or equal to 1.4 and less than or equal to 1.6, and the refractive index n2 of the high-refractive-index film layers at 550nm is greater than or equal to 1.8 and less than or equal to 2.3. The thickness of the anti-reflection film layer in the glass cover plate is larger than or equal to 80 nm and smaller than or equal to 138 nm, so that the thickness of the anti-reflection film layer through which light penetrates during large-viewing-angle observation can be close to 140 nm, and the problem that the anti-reflection effect is poor under the large viewing angle can be solved.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a glass cover and display screen. Background Technology

[0002] Currently, display screens typically use AR (Anti-Reflection) coatings on their glass covers to reduce ambient light reflectivity and improve display quality. AR coatings, also known as anti-reflective coatings, are high-transmittance optical coatings.

[0003] The glass cover plate coated with AR film in the related technology basically only has a good anti-reflection effect at a normal viewing angle. At a wide viewing angle, the anti-reflection effect is poor or almost non-existent. Summary of the Invention

[0004] This application provides a glass cover and a display screen, which aims to improve the problem of poor anti-reflection effect of the glass cover at a wide viewing angle.

[0005] The specific technical solution is as follows:

[0006] An embodiment of the first aspect of this application provides a glass cover plate, the glass cover plate comprising:

[0007] Glass substrate;

[0008] And an anti-reflection and anti-reflection coating layer is disposed on one side of the glass substrate, wherein the thickness of the anti-reflection and anti-reflection coating layer is greater than or equal to 80 nm and less than or equal to 138 nm;

[0009] The antireflective coating (200) includes multiple low-refractive-index layers and multiple high-refractive-index layers, which are stacked alternately. The refractive index n1 of the low-refractive-index layers at 550 nm satisfies: 1.4 ≤ n1 ≤ 1.6, and the refractive index n2 of the high-refractive-index layers at 550 nm satisfies: 1.8 ≤ n2 ≤ 2.3.

[0010] In the glass cover of this application embodiment, the thickness of the anti-reflection and anti-reflection coating layer is greater than or equal to 80nm and less than or equal to 138nm. Compared with the anti-reflection and anti-reflection coating layers in related technologies, the overall thickness is smaller. This allows the thickness of the anti-reflection and anti-reflection coating layer that is transmitted by optics when viewed at a large angle to be closer to 140nm. Thus, the problem of poor anti-reflection effect at a large angle can be improved.

[0011] In some embodiments, the plurality of low-refractive-index films include a first low-refractive-index film, a second low-refractive-index film, a third low-refractive-index film, and a fourth low-refractive-index film; the plurality of high-refractive-index films include a first high-refractive-index film, a second high-refractive-index film, and a third high-refractive-index film.

[0012] Wherein, the first low refractive index film layer is disposed on the glass substrate, the first high refractive index film layer is disposed on the first low refractive index film layer, the second low refractive index film layer is disposed on the first high refractive index film layer, the second high refractive index film layer is disposed on the second low refractive index film layer, the third low refractive index film layer is disposed on the second high refractive index film layer, the third high refractive index film layer is disposed on the third low refractive index film layer, and the fourth low refractive index film layer is disposed on the third high refractive index film layer.

[0013] In this embodiment, the more layers the antireflective coating contains, the better the antireflective effect. However, when the total number of layers exceeds seven, the improvement in antireflective effect becomes less significant, and it also leads to an increase in manufacturing costs. Therefore, a total of seven layers is the optimal choice that balances antireflective effect and manufacturing cost.

[0014] In some of these embodiments, the thickness of the first low-refractive-index film is greater than or equal to 8 nm and less than or equal to 15 nm.

[0015] The thickness of the first high-refractive-index film is greater than or equal to 6 nm and less than or equal to 8 nm;

[0016] The thickness of the second low-refractive-index film is greater than or equal to 8 nm and less than or equal to 15 nm;

[0017] The thickness of the second high refractive index film is greater than or equal to 10 nm and less than or equal to 15 nm;

[0018] The thickness of the third low-refractive-index film is greater than or equal to 8 nm and less than or equal to 15 nm;

[0019] The thickness of the third high refractive index film is greater than or equal to 10 nm and less than or equal to 20 nm;

[0020] The thickness of the fourth low-refractive-index film is greater than or equal to 30 nm and less than or equal to 50 nm.

[0021] This configuration ensures that the total thickness of the antireflective coating is greater than or equal to 80 nm and less than or equal to 138 nm, thus improving the antireflective effect at wide viewing angles. Furthermore, the fourth low-refractive-index layer, furthest from the glass substrate, has the greatest thickness. This allows the thicker fourth low-refractive-index layer to protect the other layers in the antireflective coating, thereby enhancing the reliability of the antireflective coating system.

[0022] In some embodiments, the plurality of low-refractive-index films include a first low-refractive-index film, a second low-refractive-index film, and a third low-refractive-index film; the plurality of high-refractive-index films include a first high-refractive-index film and a second high-refractive-index film.

[0023] The first high refractive index film layer is disposed on the first low refractive index film layer, the second low refractive index film layer is disposed on the first high refractive index film layer, the second high refractive index film layer is disposed on the second low refractive index film layer, and the third low refractive index film layer is disposed on the second high refractive index film layer.

[0024] In this embodiment, the antireflective coating comprises five layers, including three low-refractive-index layers and two high-refractive-index layers. Compared to antireflective coatings with a single-layer structure, it offers better antireflection performance. Furthermore, compared to antireflective coatings with a total of seven layers, its manufacturing cost is relatively lower.

[0025] In some of these embodiments, the thickness of the first low-refractive-index film is greater than or equal to 15 nm and less than or equal to 25 nm.

[0026] The thickness of the first high refractive index film is greater than or equal to 10 nm and less than or equal to 15 nm;

[0027] The thickness of the second low-refractive-index film is greater than or equal to 15 nm and less than or equal to 25 nm;

[0028] The thickness of the second high refractive index film is greater than or equal to 10 nm and less than or equal to 25 nm;

[0029] The thickness of the third low-refractive-index film is greater than or equal to 30 nm and less than or equal to 48 nm.

[0030] This configuration ensures that the total thickness of the antireflective coating is greater than or equal to 80 nm and less than or equal to 138 nm, thus improving the antireflective effect at wide viewing angles. Furthermore, the third low-refractive-index layer, furthest from the glass substrate, has the greatest thickness. This allows the thicker third low-refractive-index layer to protect the other layers in the antireflective coating, thereby improving the reliability of the antireflective coating.

[0031] In some of these embodiments, the thickness of the antireflective coating is greater than or equal to 80 nm and less than or equal to 120 nm.

[0032] When the antireflective coating meets this thickness range, the thickness of the antireflective coating that is transmitted by optics when viewed at a large angle can be closer to 140nm, thereby better improving the problem of poor antireflection effect at a large angle.

[0033] In some embodiments, the plurality of low-refractive-index films include a first low-refractive-index film, a second low-refractive-index film, a third low-refractive-index film, and a fourth low-refractive-index film; the plurality of high-refractive-index films include a first high-refractive-index film, a second high-refractive-index film, and a third high-refractive-index film; wherein the first low-refractive-index film is disposed on the glass substrate, the first high-refractive-index film is disposed on the first low-refractive-index film, the second low-refractive-index film is disposed on the first high-refractive-index film, the second high-refractive-index film is disposed on the second low-refractive-index film, the third low-refractive-index film is disposed on the second high-refractive-index film, the third high-refractive-index film is disposed on the third low-refractive-index film, and the fourth low-refractive-index film is disposed on the third high-refractive-index film.

[0034] In this embodiment, the antireflective coating comprises seven layers, including four low-refractive-index layers and three high-refractive-index layers. A total of seven layers represents a preferable choice that balances antireflective performance with manufacturing cost.

[0035] In some of these embodiments, the thickness of the first low-refractive-index film is greater than or equal to 8 nm and less than or equal to 13 nm;

[0036] The thickness of the first high refractive index film is greater than or equal to 6 nm and less than or equal to 11 nm;

[0037] The thickness of the second low-refractive-index film is greater than or equal to 8 nm and less than or equal to 13 nm;

[0038] The thickness of the second high refractive index film is greater than or equal to 10 nm and less than or equal to 15 nm;

[0039] The thickness of the third low-refractive-index film is greater than or equal to 8 nm and less than or equal to 13 nm;

[0040] The thickness of the third high refractive index film is greater than or equal to 10 nm and less than or equal to 15 nm;

[0041] The thickness of the fourth low-refractive-index film is greater than or equal to 30 nm and less than or equal to 40 nm.

[0042] This configuration ensures that the total thickness of the antireflective coating is greater than or equal to 80 nm and less than or equal to 120 nm, thereby better improving the poor antireflective effect at large viewing angles.

[0043] In some embodiments, the high refractive index film is made of one or more combinations of titanium dioxide, niobium pentoxide, tantalum pentoxide, and silicon nitride compounds;

[0044] The material of the low refractive index film is one or more of silicon dioxide, aluminum oxide, silicon monoxide, and magnesium fluoride.

[0045] An embodiment of the second aspect of this application provides a display screen, the display screen including the glass cover plate of any of the above embodiments.

[0046] The display screen in this embodiment includes a glass cover plate comprising a glass substrate and an anti-reflection coating layer disposed on one side of the glass substrate. The thickness of the anti-reflection coating layer is greater than or equal to 80 nm and less than or equal to 138 nm. Compared with the anti-reflection coating layer in related technologies, the overall thickness is smaller. This allows the thickness of the anti-reflection coating layer that is transmitted by light when viewed from a large angle to be closer to 140 nm, thereby improving the problem of poor anti-reflection effect at large viewing angles. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the layer structure of a glass cover plate in related technologies;

[0048] Figure 2 A schematic diagram of the layer structure of a glass cover provided in an embodiment of this application;

[0049] Figure 3 This is a schematic diagram of the layer structure of an antireflective and anti-reflective coating layer provided in an embodiment of this application;

[0050] Figure 4 This is a schematic diagram of the layer structure of an antireflective and anti-reflective coating layer provided in another embodiment of this application.

[0051] Explanation of reference numerals in the attached figures:

[0052] 100', Glass substrate; 200', Anti-reflective coating layer;

[0053] 10. Glass cover plate;

[0054] 100. Glass substrate;

[0055] 200. Anti-reflective and anti-reflective coating layer;

[0056] 210. First low-refractive-index film layer;

[0057] 220. First high refractive index film layer;

[0058] 230. Second low refractive index film layer;

[0059] 240. The second highest refractive index film layer;

[0060] 250. The third low-refractive-index film layer;

[0061] 260. The third highest refractive index film layer;

[0062] 270. Fourth low-refractive-index film layer. Detailed Implementation

[0063] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0064] In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0065] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0066] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0067] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0068] Currently, display screens typically use AR (Anti-Reflection) coatings on their glass covers to reduce ambient light reflectivity and improve display quality. AR coatings, also known as anti-reflective coatings, are high-transmittance optical coatings.

[0069] The glass cover plate coated with AR film in the related technology basically only has a good anti-reflection effect at a normal viewing angle. At a wide viewing angle, the anti-reflection effect is poor or almost non-existent.

[0070] Based on the above phenomena, the applicant of this application has conducted a lot of research to explore in depth the reasons for the poor anti-reflection effect of glass cover plates in related technologies at large viewing angles, and finally found that the thickness of AR film is the key factor affecting the anti-reflection effect. Figure 1 This is a schematic diagram of the layer structure of a glass cover plate in related technologies, such as... Figure 1 As shown, a glass cover plate in the related technology includes a glass substrate 100' and an anti-reflection coating layer 200' deposited on the glass substrate 100'. Generally, the anti-reflection effect is better when the thickness of the anti-reflection coating layer 200' is close to or equal to 1 / 4 of the wavelength of visible light. When designing the anti-reflection coating layer, white light with a wavelength of 550nm is usually used as a reference. That is, the anti-reflection effect is better when the thickness of the anti-reflection coating layer 200' is equal to or approximately equal to 140nm.

[0071] However, when the thickness L1 of the antireflective coating 200' is equal to or approximately equal to 140nm, the thickness L2 of the coating that light passes through when observed at a large viewing angle is significantly greater than 140nm. In other words, when observed at a large viewing angle, the thickness L2 of the antireflective coating corresponding to the light increases and deviates significantly from 140nm. As a result, the antireflective effect deteriorates at large viewing angles.

[0072] Based on the above research results, the applicant of this application proposes a glass cover plate that can improve the problem of poor anti-reflection effect at a large viewing angle by rationally designing the thickness of the anti-reflection and anti-reflection film layer.

[0073] The above is the core idea of ​​this application. The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0074] An embodiment of the first aspect of this application provides a glass cover plate. Figure 2 This is a schematic diagram of the layer structure of a glass cover provided in one embodiment of this application, as shown below. Figure 2As shown, the glass cover plate 10 includes a glass substrate 100 and an anti-reflection and anti-reflection coating layer 200. The anti-reflection and anti-reflection coating layer 200 is disposed on one side of the glass substrate 100, and the thickness of the anti-reflection and anti-reflection coating layer 200 is greater than or equal to 80 nm and less than or equal to 138 nm.

[0075] The antireflective coating 200 can be deposited on the glass substrate 100 using processes such as physical vapor deposition, chemical vapor deposition, and vacuum magnetron sputtering. For example, the thickness of the antireflective coating 200 can be 80nm, 90nm, 100nm, 110nm, 120nm, 130nm, 135nm, 138nm, etc.

[0076] In the glass cover plate 10 of this application embodiment, the thickness of the anti-reflection and anti-reflection coating layer 200 is greater than or equal to 80nm and less than or equal to 138nm. Compared with the anti-reflection and anti-reflection coating layer 200 in related technologies, the overall thickness is smaller. This allows the thickness of the anti-reflection and anti-reflection coating layer 200 that is transmitted by light when viewed at a large angle to be closer to 140nm. As a result, the problem of poor anti-reflection effect at a large angle can be improved.

[0077] In some embodiments of this application, the antireflective coating 200 is a single-layer structure, and the refractive index of the single-layer structure is less than that of the glass substrate 100. Each of the two sides of the single-layer structure forms an optical interface. When ambient light shines on the antireflective coating 200, the two optical interfaces generate reflected light, and the peaks and troughs of the two reflected lights can cancel each other out, thereby achieving an antireflective effect. In this embodiment, the antireflective coating 200 adopts a single-layer structure, which not only achieves better antireflective effects at a wide viewing angle but also reduces costs compared to multi-layer structures.

[0078] Figure 3 This is a schematic diagram of the layer structure of an antireflective and anti-reflective coating layer provided in an embodiment of this application, as shown below. Figure 3As shown, in some other embodiments of this application, the antireflective coating 200 includes multiple low-refractive-index layers and multiple high-refractive-index layers, which are alternately stacked. The refractive index n1 of the low-refractive-index layers at 550 nm satisfies: 1.4 ≤ n1 ≤ 1.6; the refractive index n2 of the high-refractive-index layers at 550 nm satisfies: 1.8 ≤ n2 ≤ 2.3. In this embodiment, the antireflective coating 200 is a multi-layer structure, achieving an antireflective effect through the alternating stacking of multiple low-refractive-index layers and multiple high-refractive-index layers. Furthermore, compared to a single-layer structure, the multi-layer structure, through refractive index matching between the low-refractive-index and high-refractive-index layers, allows the constructed antireflective coating 200 to achieve a relatively better antireflective effect. For example, the refractive index n1 of a low refractive index film at 550 nm can be 1.4, 1.5, 1.6, etc.; the refractive index n2 of a high refractive index film at 550 nm can be 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, etc.

[0079] Furthermore, the material of the high refractive index film can be one or more of titanium dioxide, niobium pentoxide, tantalum pentoxide and silicon nitride compounds, and the material of the low refractive index film can be one or more of silicon dioxide, aluminum oxide, silicon monoxide and magnesium fluoride.

[0080] In a specific embodiment, such as Figure 3 As shown, the plurality of low-refractive-index films include a first low-refractive-index film layer 210, a second low-refractive-index film layer 230, a third low-refractive-index film layer 250, and a fourth low-refractive-index film layer 270. The plurality of high-refractive-index films include a first high-refractive-index film layer 220, a second high-refractive-index film layer 240, and a third high-refractive-index film layer 260. Specifically, the first low-refractive-index film layer 210 is disposed on the glass substrate 100, the first high-refractive-index film layer 220 is disposed on the first low-refractive-index film layer 210, the second low-refractive-index film layer 230 is disposed on the first high-refractive-index film layer 220, the second high-refractive-index film layer 240 is disposed on the second low-refractive-index film layer 230, the third low-refractive-index film layer 250 is disposed on the second high-refractive-index film layer 240, the third high-refractive-index film layer 260 is disposed on the third low-refractive-index film layer 250, and the fourth low-refractive-index film layer 270 is disposed on the third high-refractive-index film layer 260.

[0081] In this embodiment, the antireflective coating 200 includes seven layers, of which four are low-refractive-index layers and three are high-refractive-index layers. It is understood that the more layers the antireflective coating 200 contains, the better the antireflective effect. However, when the total number of layers exceeds seven, the improvement in antireflective effect becomes less significant, and it also leads to increased manufacturing costs. Therefore, a total of seven layers is the optimal choice that balances antireflective effect and manufacturing cost.

[0082] Specifically, when the antireflective coating 200 includes four low-refractive-index layers and three high-refractive-index layers, the thickness of each layer is as follows: the thickness of the first low-refractive-index layer 210 is greater than or equal to 8 nm and less than or equal to 15 nm; the thickness of the first high-refractive-index layer 220 is greater than or equal to 6 nm and less than or equal to 8 nm; the thickness of the second low-refractive-index layer 230 is greater than or equal to 8 nm and less than or equal to 15 nm; the thickness of the second high-refractive-index layer 240 is greater than or equal to 10 nm and less than or equal to 15 nm; the thickness of the third low-refractive-index layer 250 is greater than or equal to 8 nm and less than or equal to 15 nm; the thickness of the third high-refractive-index layer 260 is greater than or equal to 10 nm and less than or equal to 20 nm; and the thickness of the fourth low-refractive-index layer 270 is greater than or equal to 30 nm and less than or equal to 50 nm.

[0083] For example, the thickness of the first low-refractive-index film 210 can be 8 nm, 9 nm, 10 nm, 11 nm, 12 nm, 13 nm, 14 nm, 15 nm, etc.; the thickness of the first high-refractive-index film 220 can be 6 nm, 7 nm, 8 nm, etc.; the thickness of the second low-refractive-index film 230 can be 8 nm, 9 nm, 10 nm, 11 nm, 12 nm, 13 nm, 14 nm, 15 nm, etc.; and the thickness of the second high-refractive-index film 240 can be 10 nm, 11 nm, 12 nm, 13 nm, etc. The thickness of the third low-refractive-index film 250 can be 8nm, 9nm, 10nm, 11nm, 12nm, 13nm, 14nm, 15nm, etc.; the thickness of the third high-refractive-index film 260 can be 10nm, 11nm, 12nm, 13nm, 14nm, 15nm, etc.; the thickness of the fourth low-refractive-index film 270 can be 30nm, 35nm, 40nm, 45nm, 50nm, etc.

[0084] This configuration ensures that the total thickness of the antireflective coating 200 is greater than or equal to 80 nm and less than or equal to 138 nm, thereby improving the antireflection effect at a wide viewing angle. Furthermore, the fourth low-refractive-index coating 270, which is furthest from the glass substrate 100, has the greatest thickness. This allows the thicker fourth low-refractive-index coating 270 to protect the other layers in the antireflective coating 200, thus improving the reliability of the antireflective coating 200.

[0085] Figure 4 This is a schematic diagram of the layer structure of an antireflective and anti-reflective coating layer provided in another embodiment of this application, as shown below. Figure 4 As shown, in another specific embodiment, the plurality of low-refractive-index films include a first low-refractive-index film layer 210, a second low-refractive-index film layer 230, and a third low-refractive-index film layer 250. The plurality of high-refractive-index films include a first high-refractive-index film layer 220 and a second high-refractive-index film layer 240. The first high-refractive-index film layer 220 is disposed on the first low-refractive-index film layer 210, the second low-refractive-index film layer 230 is disposed on the first high-refractive-index film layer 220, the second high-refractive-index film layer 240 is disposed on the second low-refractive-index film layer 230, and the third low-refractive-index film layer 250 is disposed on the second high-refractive-index film layer 240.

[0086] In this embodiment, the antireflective coating 200 includes five layers, of which three are low-refractive-index layers and two are high-refractive-index layers. Compared to an antireflective coating 200 with a single-layer structure, it offers better antireflection performance. Furthermore, compared to an antireflective coating 200 with a total of seven layers, its manufacturing cost is relatively lower.

[0087] Specifically, when the antireflective coating 200 includes three low-refractive-index layers and two high-refractive-index layers, the thickness of each layer is as follows: the thickness of the first low-refractive-index layer 210 is greater than or equal to 15 nm and less than or equal to 25 nm; the thickness of the first high-refractive-index layer 220 is greater than or equal to 10 nm and less than or equal to 15 nm; the thickness of the second low-refractive-index layer 230 is greater than or equal to 15 nm and less than or equal to 25 nm; the thickness of the second high-refractive-index layer 240 is greater than or equal to 10 nm and less than or equal to 25 nm; and the thickness of the third low-refractive-index layer 250 is greater than or equal to 30 nm and less than or equal to 48 nm.

[0088] For example, the thickness of the first low-refractive-index film layer 210 can be 15nm, 16nm, 17nm, 18nm, 19nm, 20nm, 21nm, 22nm, 23nm, 24nm, 25nm, etc.; the thickness of the first high-refractive-index film layer 220 can be 10nm, 11nm, 12nm, 13nm, 14nm, 15nm, etc.; and the thickness of the second low-refractive-index film layer 230 can be 15nm, 16nm, 17nm, 18nm, 19nm, 20nm, etc. The thickness of the second high-refractive-index film 240 can be 10nm, 11nm, 12nm, 13nm, 14nm, 15nm, 16nm, 17nm, 18nm, 19nm, 20nm, 21nm, 22nm, 23nm, 24nm, 25nm, etc.; the thickness of the third low-refractive-index film 250 can be 30nm, 35nm, 40nm, 45nm, 48nm, etc.

[0089] This configuration ensures that the total thickness of the antireflective coating 200 is greater than or equal to 80 nm and less than or equal to 138 nm, thereby improving the antireflection effect at wide viewing angles. Furthermore, the third low-refractive-index coating 250, which is furthest from the glass substrate 100, has the greatest thickness. This allows the thicker third low-refractive-index coating 250 to protect the other layers in the antireflective coating 200, thus improving the reliability of the antireflective coating 200.

[0090] In some embodiments of this application, the thickness of the antireflective coating 200 is greater than or equal to 80 nm and less than or equal to 120 nm. When the antireflective coating 200 meets this thickness range, the thickness of the antireflective coating 200 transmitted by optics during wide-view observation can be closer to 140 nm, thereby better improving the problem of poor antireflection effect at wide-view angles.

[0091] In one embodiment, the plurality of low-refractive-index films include a first low-refractive-index film 210, a second low-refractive-index film 230, a third low-refractive-index film 250, and a fourth low-refractive-index film 270; the plurality of high-refractive-index films include a first high-refractive-index film 220, a second high-refractive-index film 240, and a third high-refractive-index film 260; wherein the first low-refractive-index film 210 is disposed on the glass substrate 100, the first high-refractive-index film 220 is disposed on the first low-refractive-index film 210, the second low-refractive-index film 230 is disposed on the first high-refractive-index film 220, the second high-refractive-index film 240 is disposed on the second low-refractive-index film 230, the third low-refractive-index film 250 is disposed on the second high-refractive-index film 240, the third high-refractive-index film 260 is disposed on the third low-refractive-index film 250, and the fourth low-refractive-index film 270 is disposed on the third high-refractive-index film 260.

[0092] In this embodiment, the antireflective coating 200 includes seven layers, of which four are low-refractive-index layers and three are high-refractive-index layers. As mentioned above, a total of seven layers is a better choice that balances antireflective effect and manufacturing cost.

[0093] Specifically, when the antireflective coating 200 includes four low-refractive-index layers and three high-refractive-index layers, the thickness of each layer is as follows: the thickness of the first low-refractive-index layer 210 is greater than or equal to 8 nm and less than or equal to 13 nm; the thickness of the first high-refractive-index layer 220 is greater than or equal to 6 nm and less than or equal to 11 nm; the thickness of the second low-refractive-index layer 230 is greater than or equal to 8 nm and less than or equal to 13 nm; the thickness of the second high-refractive-index layer 240 is greater than or equal to 10 nm and less than or equal to 15 nm; the thickness of the third low-refractive-index layer 250 is greater than or equal to 8 nm and less than or equal to 13 nm; the thickness of the third high-refractive-index layer 260 is greater than or equal to 10 nm and less than or equal to 15 nm; and the thickness of the fourth low-refractive-index layer 270 is greater than or equal to 30 nm and less than or equal to 40 nm.

[0094] For example, the thickness of the first low-refractive-index film 210 can be 8 nm, 9 nm, 10 nm, 11 nm, 12 nm, 13 nm, etc.; the thickness of the first high-refractive-index film 220 can be 6 nm, 7 nm, 8 nm, 9 nm, 10 nm, 11 nm, etc.; the thickness of the second low-refractive-index film 230 can be 8 nm, 9 nm, 10 nm, 11 nm, 12 nm, 13 nm, etc.; the thickness of the second high-refractive-index film 240 can be 10 nm, The thickness of the third low-refractive-index film layer 250 can be 8nm, 9nm, 10nm, 11nm, 12nm, 13nm, etc.; the thickness of the third high-refractive-index film layer 260 can be 10nm, 11nm, 12nm, 13nm, 14nm, 15nm, etc.; the thickness of the fourth low-refractive-index film layer 270 can be 30nm, 32nm, 35nm, 38nm, 40nm, etc.

[0095] This configuration ensures that the total thickness of the antireflective coating layer 200 is greater than or equal to 80 nm and less than or equal to 120 nm, thereby better improving the poor antireflective effect at large viewing angles.

[0096] An embodiment of the second aspect of this application provides a display screen, which includes the glass cover 10 of any of the above embodiments.

[0097] The display screen in this embodiment includes a glass cover plate 10 comprising a glass substrate 100 and an anti-reflection coating 200 disposed on one side of the glass substrate 100. The thickness of the anti-reflection coating 200 is greater than or equal to 80 nm and less than or equal to 138 nm. Compared with the anti-reflection coating 200 in related technologies, the overall thickness is smaller. This allows the thickness of the anti-reflection coating 200 that is transmitted by light when viewed at a wide viewing angle to be closer to 140 nm. Thus, the problem of poor anti-reflection effect at a wide viewing angle can be improved.

[0098] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A glass cover plate, characterized in that, include: Glass substrate; as well as An antireflective coating is disposed on one side of the glass substrate, and the thickness of the antireflective coating is greater than or equal to 80 nm and less than or equal to 138 nm. The antireflective coating layer comprises multiple low-refractive-index layers and multiple high-refractive-index layers, which are alternately stacked. The refractive index n1 of the low-refractive-index layers at 550 nm satisfies: 1.4 ≤ n1 ≤ 1.6, and the refractive index n2 of the high-refractive-index layers at 550 nm satisfies: 1.8 ≤ n2 ≤ 2.

3.

2. The glass cover plate according to claim 1, characterized in that, The plurality of low-refractive-index films include a first low-refractive-index film, a second low-refractive-index film, a third low-refractive-index film, and a fourth low-refractive-index film; the plurality of high-refractive-index films include a first high-refractive-index film, a second high-refractive-index film, and a third high-refractive-index film. Wherein, the first low refractive index film layer is disposed on the glass substrate, the first high refractive index film layer is disposed on the first low refractive index film layer, the second low refractive index film layer is disposed on the first high refractive index film layer, the second high refractive index film layer is disposed on the second low refractive index film layer, the third low refractive index film layer is disposed on the second high refractive index film layer, the third high refractive index film layer is disposed on the third low refractive index film layer, and the fourth low refractive index film layer is disposed on the third high refractive index film layer.

3. The glass cover plate according to claim 2, characterized in that, The thickness of the first low-refractive-index film is greater than or equal to 8 nm and less than or equal to 15 nm; The thickness of the first high-refractive-index film is greater than or equal to 6 nm and less than or equal to 8 nm; The thickness of the second low-refractive-index film is greater than or equal to 8 nm and less than or equal to 15 nm; The thickness of the second high refractive index film is greater than or equal to 10 nm and less than or equal to 15 nm; The thickness of the third low-refractive-index film is greater than or equal to 8 nm and less than or equal to 15 nm; The thickness of the third high refractive index film is greater than or equal to 10 nm and less than or equal to 20 nm; The thickness of the fourth low-refractive-index film is greater than or equal to 30 nm and less than or equal to 50 nm.

4. The glass cover plate according to claim 1, characterized in that, The plurality of low-refractive-index films include a first low-refractive-index film, a second low-refractive-index film, and a third low-refractive-index film; the plurality of high-refractive-index films include a first high-refractive-index film and a second high-refractive-index film. The first high refractive index film layer is disposed on the first low refractive index film layer, the second low refractive index film layer is disposed on the first high refractive index film layer, the second high refractive index film layer is disposed on the second low refractive index film layer, and the third low refractive index film layer is disposed on the second high refractive index film layer.

5. The glass cover plate according to claim 4, characterized in that, The thickness of the first low-refractive-index film is greater than or equal to 15 nm and less than or equal to 25 nm; The thickness of the first high refractive index film is greater than or equal to 10 nm and less than or equal to 15 nm; The thickness of the second low-refractive-index film is greater than or equal to 15 nm and less than or equal to 25 nm; The thickness of the second high refractive index film is greater than or equal to 10 nm and less than or equal to 25 nm; The thickness of the third low-refractive-index film is greater than or equal to 30 nm and less than or equal to 48 nm.

6. The glass cover plate according to claim 1, characterized in that, The thickness of the antireflective and anti-reflective coating is greater than or equal to 80 nm and less than or equal to 120 nm.

7. The glass cover plate according to claim 6, characterized in that, The plurality of low-refractive-index films include a first low-refractive-index film, a second low-refractive-index film, a third low-refractive-index film, and a fourth low-refractive-index film; the plurality of high-refractive-index films include a first high-refractive-index film, a second high-refractive-index film, and a third high-refractive-index film. Wherein, the first low refractive index film layer is disposed on the glass substrate, the first high refractive index film layer is disposed on the first low refractive index film layer, the second low refractive index film layer is disposed on the first high refractive index film layer, the second high refractive index film layer is disposed on the second low refractive index film layer, the third low refractive index film layer is disposed on the second high refractive index film layer, the third high refractive index film layer is disposed on the third low refractive index film layer, and the fourth low refractive index film layer is disposed on the third high refractive index film layer.

8. The glass cover plate according to claim 7, characterized in that, The thickness of the first low-refractive-index film is greater than or equal to 8 nm and less than or equal to 13 nm; The thickness of the first high refractive index film is greater than or equal to 6 nm and less than or equal to 11 nm; The thickness of the second low-refractive-index film is greater than or equal to 8 nm and less than or equal to 13 nm; The thickness of the second high refractive index film is greater than or equal to 10 nm and less than or equal to 15 nm; The thickness of the third low-refractive-index film is greater than or equal to 8 nm and less than or equal to 13 nm; The thickness of the third high refractive index film is greater than or equal to 10 nm and less than or equal to 15 nm; The thickness of the fourth low-refractive-index film is greater than or equal to 30 nm and less than or equal to 40 nm.

9. The glass cover plate according to any one of claims 1 to 8, characterized in that, The high refractive index film is made of one or more of titanium dioxide, niobium pentoxide, tantalum pentoxide, and silicon nitride compounds. The material of the low refractive index film is one or more of silicon dioxide, aluminum oxide, silicon monoxide, and magnesium fluoride.

10. A display screen, characterized in that, Includes the glass cover plate according to any one of claims 1 to 10.

Images