Display device

Abstract

The application provides an embodiment belonging to the technical field of display devices, and provides a display device. The display device comprises a display panel and a protective glass. The protective glass is arranged on the display side of the display panel. A first optical film layer and a second optical film layer are arranged on the two sides of the protective glass respectively. One of the first optical film layer and the second optical film layer is used for reflecting infrared rays, and the other is used for absorbing ultraviolet rays. Therefore, the protective glass can physically protect the display panel, and has the functions of isolating infrared rays and ultraviolet rays at the same time. Thus, the protection range of the protective glass is improved, and the protection performance of the protective glass is improved.

Description

Technical Field

[0001] This application relates to the field of display device technology. In particular, it relates to a display device. Background Technology

[0002] This application relates to outdoor display devices, such as commercial exhibition screens, traffic information display screens, stage background displays, outdoor televisions, etc. The display devices are not limited to applications in commercial exhibitions, public services, cultural and sports activities, transportation, urban landscapes, and other fields.

[0003] In related technologies, display devices are directly installed in outdoor environments and are affected by environmental factors such as temperature fluctuations, rain, snow, hail, and sunlight. This results in low protection performance of the display devices, leading to unreliable display performance. Utility Model Content

[0004] This application provides a display device to solve the technical problem of unreliable display performance caused by low protection performance of the display device, so as to improve the protection performance and display reliability of the display device.

[0005] This application provides a display device, including:

[0006] Display panel;

[0007] A protective glass is disposed on the display side of the display panel, and along the thickness direction of the display panel, the projection of the protective glass covers the projection of the display panel;

[0008] The protective glass includes a glass substrate, a first optical film layer, and a second optical film layer. The first optical film layer is disposed on the side of the glass substrate facing away from the display panel, and the second optical film layer is disposed between the glass substrate and the display panel. One of the first optical film layer and the second optical film layer is used to reflect infrared light, and the other is used to absorb ultraviolet light.

[0009] In this embodiment, by providing protective glass on the display side of the display panel of the display device, the displayed image is projected onto the external environment through the protective glass, rather than being directly exposed to the external environment. This improves the protection performance of the display panel and enhances the overall protection and reliability of the display device. Furthermore, by providing a first optical film layer and a second optical film layer on both sides of the protective glass, with one layer reflecting infrared radiation and the other absorbing ultraviolet radiation, the protective glass provides both physical protection and isolation from infrared and ultraviolet radiation, thereby increasing its protection range and performance. Additionally, infrared isolation reduces the amount of heat radiation transmitted from the external environment to the display panel, reducing heat generation and improving the device's operational sensitivity. Ultraviolet isolation prevents components from being exposed to large amounts of ultraviolet radiation over long periods, preventing rapid aging and fading of the display image, thus improving display clarity and reliability. Furthermore, the first and second optical film layers enhance the mechanical strength of the protective glass from both sides, thereby improving the reliability of the protective glass in protecting the protective panel.

[0010] In some embodiments, the glass substrate includes a substrate body and at least one stress-enhancing layer disposed on the surface of the substrate body, and the central region of the substrate body has tensile stress.

[0011] This design enhances the mechanical strength of the glass substrate, improves its resistance to wind pressure, hail, and accidental impacts in outdoor environments, and enhances the environmental adaptability of the display device. Furthermore, the increased strength of the glass substrate allows for a reduction in its thickness.

[0012] In some embodiments, a first high compressive stress layer and a second high compressive stress layer are formed on the surface of the substrate body. The first high compressive stress layer is formed by potassium ions replacing surface ions of the substrate body. The second high compressive stress layer is formed by heating the substrate body to a first preset temperature and then rapidly cooling it at a second preset temperature lower than the first preset temperature to cause surface shrinkage. The tensile stress in the central region of the substrate body is balanced with the compressive stress of the second high compressive stress layer.

[0013] This design, with the first and second high compressive stress layers, enhances the mechanical protective strength of the protective glass while also improving its resistance to high and low temperatures and damp heat. Furthermore, as the glass substrate's resistance to mechanical impact improves, the substrate thickness can be reduced, thereby increasing the light transmittance of the protective glass.

[0014] In some embodiments, an infrared reflective film is deposited on the side of the glass substrate opposite to the display panel to form the first optical film layer for reflecting infrared light.

[0015] This design reduces the amount of heat radiation transferred from the external environment to the display panel, thereby reducing heat generation in the display device and improving its operational sensitivity. Furthermore, the application of an infrared reflective film facilitates mass production, resulting in high yield and controllable costs.

[0016] In some embodiments, the infrared reflective film layer includes a base layer, a reflective layer, and a wear-resistant layer stacked sequentially. The base layer includes one of silicon dioxide and aluminum oxide, the reflective layer includes one of silver and indium tin oxide, and the wear-resistant layer includes one of titanium dioxide and silicon nitride.

[0017] This design allows the base layer and wear-resistant layer to protect the reflective layer, reducing the damage rate of the reflective layer and thus improving the reliability of the infrared reflective film in reflecting infrared rays. The multi-layer structure of the infrared reflective film also improves its hardness, wear resistance, and stability, as well as its high light transmittance. The wear-resistant layer, in particular, has high hardness, anti-graffiti properties, and is easy to clean and maintain.

[0018] In some embodiments, the protective glass further includes an adhesive layer, through which an ultraviolet absorbing film layer is bonded to the side of the glass substrate facing the display panel. The ultraviolet absorbing film layer forms the second optical film layer for absorbing the ultraviolet rays.

[0019] This design ensures that the UV-absorbing film adheres to the side of the glass substrate facing the display panel, preventing direct contact between the UV-absorbing film and the outdoor environment. This reduces the occurrence of bubbles, aging, and warping in the UV-absorbing film. Furthermore, it enhances the impact resistance and explosion-proof properties of the protective glass, preventing fragments from flying and damaging the display panel when the protective glass breaks under external force. This improves the protective reliability and environmental adaptability of the protective glass.

[0020] In some embodiments, the ultraviolet absorbing film layer includes an ultraviolet absorber and a supporting substrate.

[0021] This design improves the reliability of the protective glass in blocking ultraviolet rays while also increasing the strength of the ultraviolet absorption film.

[0022] In some embodiments, the protective glass further includes a protective layer disposed on the side of the first optical film layer opposite to the glass substrate, for at least one of oil resistance, water resistance, and scratch resistance.

[0023] This design makes it easier to remove dust deposits, graffiti, and pasted paper from the outdoor environment, thereby further enhancing the easy-to-clean properties of the protective glass and making it convenient and quick to clean the display device.

[0024] In some embodiments, the protective layer is one of a silicon dioxide film and a diamond-like carbon film.

[0025] This design not only provides protection against oil, water, and scratches, but also improves the light transmittance of the protective glass, thereby enhancing the display reliability of the display device.

[0026] In some embodiments, the thickness of the protective glass is less than or equal to 4 mm; and / or,

[0027] The protective glass has a mechanical impact protection rating of 10 or higher; and / or,

[0028] The visible light transmittance of the protective glass is greater than 80%; and / or,

[0029] The protective glass has an ultraviolet rejection rate of greater than 95%; and / or,

[0030] The infrared reflectivity of the protective glass is greater than 95%.

[0031] This design allows for control over the thickness and strength of the protective glass while improving its optical performance. Attached Figure Description

[0032] To more clearly illustrate the implementation methods in the embodiments of this application or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0033] Figure 1 A schematic diagram of the structure of a display device provided in an embodiment of this application;

[0034] Figure 2 This is a schematic diagram of a first structure of protective glass provided in an embodiment of this application;

[0035] Figure 3 This is a second structural schematic diagram of the display device provided in an embodiment of this application;

[0036] Figure 4 A schematic diagram of the structure of the first optical film layer provided in the embodiments of this application;

[0037] Figure 5 This is a schematic diagram of a second structure of the protective glass provided in an embodiment of this application;

[0038] Figure 6 This is a schematic diagram of a third structure of protective glass provided in an embodiment of this application;

[0039] Figure 7 This is a schematic diagram of a fourth structure of protective glass provided in an embodiment of this application;

[0040] Figure 8 This is a schematic diagram of the structure of the substrate body in the glass substrate provided in the embodiments of this application;

[0041] Figure 9 This is a schematic diagram of another structure of the substrate body in the glass substrate provided in the embodiments of this application;

[0042] Figure 10 A schematic diagram illustrating the optical properties of the protective glass provided in an embodiment of this application.

[0043] Explanation of reference numerals in the attached figures:

[0044] 100 - Display devices;

[0045] 101 - Display side;

[0046] 110 - Display panel;

[0047] 120 - Protective glass;

[0048] 121-Glass substrate; 122-First optical film layer; 123-Second optical film layer; 124-Adhesive layer; 125-Protective layer;

[0049] 1211-Substrate body;

[0050] 1221 - Base layer; 1222 - Reflective layer; 1223 - Wear-resistant layer;

[0051] a-Infrared and ultraviolet isolation rate curves;

[0052] b-Visible light transmittance curve. Detailed Implementation

[0053] To make the objectives, implementation methods and advantages of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only some embodiments of this application, and not all embodiments.

[0054] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0055] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclusively include, for example, a product or device that includes a series of components is not necessarily limited to those that are explicitly listed, but may include other components that are not explicitly listed or that are inherent to such product or device.

[0056] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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, they should not be construed as limitations on this application.

[0057] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0058] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0059] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0060] This application provides a display device that is used outdoors, including but not limited to commercial exhibition screens, traffic information display screens, stage background displays, outdoor televisions, etc., and is applied in fields such as commercial exhibitions, public services, cultural and sports activities, transportation, and urban landscapes.

[0061] However, display devices are directly installed in outdoor environments and are affected by environmental factors such as temperature fluctuations, rain, snow, hail, and sunlight, resulting in low protection performance and unreliable display performance.

[0062] To address the aforementioned technical problems, this application provides further improvements to the display device described in the above embodiments. The content of this application will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can more clearly and thoroughly understand the content of this application.

[0063] like Figure 1 As shown, this application embodiment provides a display device 100, which includes a display panel 110 and a protective glass 120.

[0064] The protective glass 120 is disposed on the display side 101 of the display panel 110, and along the thickness direction of the display panel 110, the projection of the protective glass 120 covers the projection of the display panel 110 to protect the display panel 110. It should be noted that the display panel 110 includes components for imaging, such as a backlight, a filter, and a polarizer. These imaging components convert light into a visual image of the display panel 110, and the side from which the visual image can be observed is the display side 101.

[0065] Furthermore, such as Figure 2 and Figure 3 As shown, the protective glass 120 includes a glass substrate 121, a first optical film layer 122, and a second optical film layer 123. The first optical film layer 122 is disposed on the side of the glass substrate 121 facing away from the display panel 110, and the second optical film layer 123 is disposed between the glass substrate 121 and the display panel 110. One of the first optical film layer 122 and the second optical film layer 123 is used to reflect infrared radiation to protect the display panel 110, preventing it from being exposed to large amounts of infrared radiation for extended periods. This allows heat to be transferred to the display panel 110 via infrared radiation, thereby reducing heat generation in the display device 100 and improving its operational sensitivity. The other of the first optical film layer 122 and the second optical film layer 123 is used to absorb ultraviolet radiation to protect the components inside the display panel 110, preventing them from being exposed to large amounts of ultraviolet radiation for extended periods, which could cause them to age prematurely and the image on the display panel 110 to fade. This improves the display clarity and reliability of the display device 100.

[0066] In this embodiment, by providing a protective glass 120 on the display side 101 of the display panel 110 of the display device 100, the display image of the display panel 110 is displayed to the external environment through the protective glass 120, rather than the display panel 110 being directly exposed to the external environment. This improves the protective performance of the display panel 110, thereby enhancing the overall protective performance and display reliability of the display device 100. Furthermore, by providing a first optical film layer 122 and a second optical film layer 123 on both sides of the protective glass 120, with one of the first optical film layer 122 reflecting infrared rays and the other absorbing ultraviolet rays, the protective glass 120 can provide physical protection for the display panel 110 while also isolating infrared and ultraviolet rays. This increases the protection range of the protective glass 120 and improves its protective performance. Furthermore, infrared isolation reduces the amount of heat radiation transmitted from the external environment to the display panel 110, thereby reducing heat generation in the display device 100 and improving its operational sensitivity. Ultraviolet isolation prevents components from being exposed to large amounts of ultraviolet radiation for extended periods, preventing rapid aging and fading of the display panel 110's image, thus improving the display clarity and reliability of the display device 100. Additionally, the first optical film layer 122 and the second optical film layer 123 enhance the mechanical strength of the protective glass 120 from both sides, thereby improving the reliability of the protective glass 120 in protecting the panel.

[0067] Furthermore, in some embodiments, an infrared reflective film layer is deposited on the side of the glass substrate 121 facing away from the display panel 110 to form a first optical film layer 122 for reflecting infrared rays, thereby reducing the amount of heat radiation transmitted from the external environment to the display panel 110, thereby reducing the heat generation of the display device 100 and improving the operating sensitivity of the display device 100.

[0068] Specifically, the infrared reflective film layer is deposited on the glass substrate 121 by magnetron sputtering, vacuum evaporation, etc., to improve the uniformity and adhesion of the infrared reflective film layer on the glass substrate 121, thereby improving the reliability of the protective glass 120 in blocking infrared rays. It is also easy to mass-produce, has a high yield, and has controllable costs.

[0069] For example, the thickness of the infrared reflective film layer deposited on the glass substrate 121 ranges from 780 to 2500 nm, such as 780 nm, 1000 nm, 1500 nm, 1800 nm, 2000 nm, 2500 nm, etc.

[0070] Among them, combined Figure 4 and Figure 5As shown, the infrared reflective film layer includes a base layer 1221, a reflective layer 1222, and a wear-resistant layer 1223 stacked sequentially, wherein the base layer 1221 is disposed close to the glass substrate 121. The base layer 1221 comprises either silicon dioxide or aluminum oxide, the reflective layer 1222 comprises either silver or indium tin oxide, or the reflective layer 1222 may be formed by doping aluminum with zinc oxide as the matrix, and the wear-resistant layer 1223 comprises either titanium dioxide or silicon nitride. This arrangement allows the base layer 1221 and the wear-resistant layer 1223 to protect the reflective layer 1222, reducing the damage rate of the reflective layer 1222 and thus improving the reliability of the infrared reflective film layer in reflecting infrared light. Furthermore, the multi-layer structure of the infrared reflective film layer, along with its high light transmittance, and the wear-resistant layer 1223's high hardness, anti-graffiti properties, and ease of cleaning, further enhances the overall hardness, wear resistance, and stability of the infrared reflective film layer.

[0071] Additionally, in some embodiments, such as Figure 6 As shown, the protective glass 120 also includes an adhesive layer 124. An ultraviolet absorbing film layer is bonded to the side of the glass substrate 121 facing the display panel 110 through the adhesive layer 124. The ultraviolet absorbing film layer forms a second optical film layer 123, which is used to absorb ultraviolet rays, thereby preventing the components from being exposed to a large amount of ultraviolet radiation for a long time, preventing the components from aging and the display panel 110 from fading, thereby improving the display clarity of the display device 100 and improving the display reliability of the display device 100.

[0072] Furthermore, the ultraviolet-absorbing film layer is bonded to the side of the glass substrate 121 facing the display panel 110, avoiding direct contact between the ultraviolet-absorbing film layer and the outdoor environment, thereby reducing the occurrence of bubbles, aging, and warping of the ultraviolet-absorbing film layer, and thus improving the reliability of the protective glass 120 in blocking ultraviolet rays. In addition, the ultraviolet-absorbing film layer is bonded to the side of the glass substrate 121 facing the display panel 110, which improves the impact-resistant buffering and explosion-proof effect of the protective glass 120, and prevents the display panel 110 from being damaged by flying fragments when the protective glass 120 is broken under external force, thereby improving the protective reliability and environmental adaptability of the protective glass 120.

[0073] As an example, the ultraviolet absorbing film includes an ultraviolet absorber and a supporting substrate, which improves the reliability of the protective glass 120 in blocking ultraviolet rays while increasing the strength of the ultraviolet absorbing film. Specifically, the supporting substrate is polyethylene terephthalate or cyclic olefin polymers, etc.; the ultraviolet absorbers include, but are not limited to: benzotriazoles, such as 2-(2'-hydroxy-5'-methylphenyl)benzotriazole, 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)benzotriazole, 2-(2'-hydroxy-3',5'-di-tert-pentylphenyl)benzotriazole, etc.; benzophenones, such as 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone, etc.; triazines, such as 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-hexyloxyphenol, 2,4-bis(2,4-dimethylphenyl)-6-(2-hydroxy-4-octyloxyphenyl)-1,3,5-triazine, etc.

[0074] As an example, the adhesive layer 124 may be made of optical adhesive or pressure-sensitive adhesive.

[0075] The optical adhesive can be composed of a first base resin, a first crosslinking agent, a silane coupling agent, a first photoinitiator, etc. The first base resin includes, but is not limited to, acrylate monomers; the first crosslinking agent includes, but is not limited to, trimethylolpropane trioxide, pentaerythritol mercaptopropionate, etc., to improve the mechanical properties and heat resistance of the optical adhesive; the silane coupling agent includes, but is not limited to, trimethoxysilane, 3-mercaptopropyltrimethoxysilane, etc., to enhance the adhesion between the optical adhesive and the glass substrate 121; the first photoinitiator includes, but is not limited to, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, α-hydroxycyclohexylphenyl ketone, 2-hydroxy-2-methyl-1-phenylpropanone, etc., to transform the optical adhesive from a liquid state to a solid state under light irradiation.

[0076] Pressure-sensitive adhesives can be composed of a second base resin, a second crosslinking agent, a second photoinitiator, and a tackifying resin. The second base resin includes, but is not limited to, acrylate monomers, polyurethane acrylates, and epoxy acrylates. The second crosslinking agent includes, but is not limited to, epoxidized m-phenylenediamine, polyisocyanate monomers, melamine resin, and urea resin, etc., to improve the mechanical and heat resistance properties of the optical adhesive. The second photoinitiator includes, but is not limited to, benzophenone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, etc., to cause the optical adhesive to change from a liquid to a solid state under light. The tackifying resin includes, but is not limited to, natural resins, such as rosin and terpene resins, or synthetic resins, such as petroleum resins and styrene resins, etc., to enhance the initial adhesion of the pressure-sensitive adhesive.

[0077] In addition, such as Figure 7As shown, the protective glass 120 also includes a protective layer 125, which is disposed on the side of the first optical film layer 122 facing away from the glass substrate 121, for at least one of oil resistance, water resistance, and scratch resistance, thereby making it easier to remove dust deposits, graffiti, and pasted paper from the outdoor environment on the surface of the protective glass 120, and further enhancing the easy-to-clean performance of the protective glass 120, so that the display device 100 can be easily and quickly cleaned with water-based cleaning agents.

[0078] For example, the protective layer 125 is either a silicon dioxide film layer or a diamond-like carbon film layer. While providing oil, water, and scratch resistance, it also improves the light transmittance of the protective glass 120, thereby enhancing the display reliability of the display device 100. Furthermore, the combination of the first optical film layer 122 and the second optical film layer 123 overcomes the technical limitation of the protective glass 120 possessing only one type of protective performance, improving the compatibility of the protective performance of the protective glass 120. Additionally, for example, the thickness of the protective layer is less than 50 nm, such as 48 nm, 45 nm, 40 nm, 35 nm, 30 nm, etc.; the water contact angle of the protective layer 125 is greater than 110°, such as 115°, 120°, 125°, 135°, 150°, etc.

[0079] Specifically, the protective layer 125 is disposed on the side of the first optical film layer 122 away from the glass substrate 121 by magnetron sputtering, vacuum evaporation, etc., in order to improve the uniformity and adhesion of the protective layer 125 on the first optical film layer 122, thereby improving the protective performance of the protective layer 125.

[0080] In some embodiments, the glass substrate 121 includes a substrate body 1211 and at least one stress-enhancing layer disposed on the surface of the substrate body 1211, and the central region of the substrate body 1211 has tensile stress. This configuration enhances the mechanical strength of the glass substrate 121, improves its resistance to wind pressure, hail, accidental impacts, etc. in outdoor environments, improves the environmental adaptability of the display device 100, and the increased strength of the glass substrate 121 allows for a reduction in the thickness of the glass substrate 121.

[0081] For example, the glass substrate 121 may be a soda-lime-silicon glass substrate 121 or an aluminosilicate glass substrate 121.

[0082] Furthermore, a first high compressive stress layer and a second high compressive stress layer are formed on the surface of the substrate body 1211.

[0083] The first high compressive stress layer is formed by potassium ions replacing surface ions of the substrate body 1211. Specifically, the glass substrate 121 can be immersed in a molten salt solution, such as a potassium nitrate solution. In the salt solution, the larger potassium ions replace the smaller sodium ions on the surface of the substrate body 1211. The potassium ions are embedded in the surface of the substrate body 1211. Because the potassium ions are larger, the surface of the substrate body 1211 is compressed, thereby forming the first high compressive stress layer. This improves the surface hardness and crack resistance of the substrate body 1211, and enhances the protective strength and reliability of the protective glass 120.

[0084] The second high compressive stress layer is formed by rapidly cooling the substrate body 1211 at a second preset temperature, which is lower than the first preset temperature, causing the surface layer to shrink. Specifically, the substrate body 1211 is heated in a tempering furnace and then rapidly cooled using high-pressure cold air, causing the surface layer of the substrate body 1211 to shrink and solidify first, forming the second high compressive stress layer. During the subsequent shrinkage and solidification process, the central region of the substrate body 1211 is constrained by the second high compressive stress layer, forming tensile stress that mutually restrains the second high compressive stress layer, and the tensile stress in the central region of the substrate body 1211 is balanced with the compressive stress of the second high compressive stress layer. The second high compressive stress layer further improves the strength, impact resistance, and bending resistance of the substrate body 1211, thereby further improving the protective strength and reliability of the protective glass 120. In some embodiments, the first preset temperature range is 600-700℃, for example, 620℃, 650℃, 680℃, 700℃, etc., and the second preset temperature range is less than 100℃, for example, 90℃, 80℃, 70℃, etc.

[0085] For example, the protective glass 120 has a mechanical impact protection rating of 10 or higher.

[0086] The combination of the first high compressive stress layer and the second high compressive stress layer improves the mechanical protective strength of the protective glass 120, as well as its resistance to high and low temperatures and damp heat. Furthermore, as the mechanical impact resistance of the glass substrate 121 improves, the thickness of the glass substrate 121 can be reduced, thereby improving the light transmittance of the protective glass 120. For example, the thickness of the protective glass 120 is less than or equal to 4 mm, such as 4 mm, 3.9 mm, 3.8 mm, 3.6 mm, 3.5 mm, etc.

[0087] In addition, before preparing the first high compressive stress layer and the second high compressive stress layer on the substrate body 1211 of the glass substrate 121, the glass substrate needs to be cut, edge-ground, and cleaned to form the substrate body 1211. Cutting involves cutting a large piece of glass substrate into the required size substrate body 1211; then, the substrate body 1211 is edge-ground, such as... Figure 8 and Figure 9 As shown, the edge grinding process includes, but is not limited to, grinding the corners of the substrate body 1211, or grinding each corner edge of the substrate body 1211 to make the grinding position have a curvature, thereby improving the appearance of the protective glass 120 and improving the safety when manually installing the protective glass 120; furthermore, the substrate body 1211 is cleaned, and the cleaning process includes, but is not limited to, rinsing, degreasing, and drying the substrate body 1211.

[0088] In some embodiments, combined with Figure 7 and Figure 10 As shown, visible light, infrared light, and ultraviolet light enter the protective glass. Visible light passes through the protective glass, infrared light is reflected by the first optical film layer, and ultraviolet light is absorbed by the second optical film layer; as shown... Figure 10 As shown, the horizontal axis represents wavelength, and the vertical axis represents percentage. Curve b is the visible light transmittance curve of protective glass 120. The wavelength range of visible light is 380~780nm. Within the range of 380~780nm, the visible light transmittance of protective glass 120 is greater than 80%, specifically, the visible light transmittance of protective glass 120 is 82%, 85%, 86%, 90%, 95%, etc. Curve a is the infrared and ultraviolet rejection rate curve of protective glass 120. The wavelength of infrared light is greater than 780nm, and the wavelength of ultraviolet light is less than 380nm. In the range of wavelengths greater than 780nm, the infrared reflectance of protective glass 120 is greater than 95%, specifically, the infrared reflectance of protective glass 120 is 96%, 97%, 98%, 99%, etc. In the range of wavelengths less than 380nm, the ultraviolet rejection rate of protective glass 120 is greater than 95%, for example, the ultraviolet rejection rate of protective glass 120 is 96%, 97%, 98%, 99%, etc.

[0089] Finally, it should be noted that the above 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 skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0090] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. A display device, characterized in that, include: Display panel (110); A protective glass (120) is disposed on the display side (101) of the display panel (110), and along the thickness direction of the display panel (110), the projection of the protective glass (120) covers the projection of the display panel (110); The protective glass (120) includes a glass substrate (121), a first optical film layer (122), and a second optical film layer (123). The first optical film layer (122) is disposed on the side of the glass substrate (121) away from the display panel (110), and the second optical film layer (123) is disposed between the glass substrate (121) and the display panel (110). One of the first optical film layer (122) and the second optical film layer (123) is used to reflect infrared rays, and the other is used to absorb ultraviolet rays.

2. The display device according to claim 1, characterized in that, The glass substrate (121) includes a substrate body (1211) and at least one stress-enhancing layer disposed on the surface of the substrate body (1211), and the central region of the substrate body (1211) has tensile stress.

3. The display device according to claim 2, characterized in that, A first high compressive stress layer and a second high compressive stress layer are formed on the surface of the substrate body (1211). The first high compressive stress layer is formed by potassium ions replacing surface ions of the substrate body (1211). The second high compressive stress layer is formed by heating the substrate body (1211) to a first preset temperature and then rapidly cooling it at a second preset temperature lower than the first preset temperature to cause surface shrinkage. The tensile stress in the central region of the substrate body (1211) is balanced with the compressive stress of the second high compressive stress layer.

4. The display device according to claim 1, characterized in that, An infrared reflective film is deposited on the side of the glass substrate (121) opposite to the display panel (110) to form the first optical film layer (122) for reflecting infrared light.

5. The display device according to claim 4, characterized in that, The infrared reflective film layer includes a base layer (1221), a reflective layer (1222), and a wear-resistant layer (1223) stacked sequentially. The base layer (1221) includes one of silicon dioxide and aluminum oxide, the reflective layer (1222) includes one of silver and indium tin oxide, and the wear-resistant layer (1223) includes one of titanium dioxide and silicon nitride.

6. The display device according to claim 1, characterized in that, The protective glass (120) also includes an adhesive layer (124), on which an ultraviolet absorbing film is bonded to the side of the glass substrate (121) facing the display panel (110) through the adhesive layer (124), and the ultraviolet absorbing film forms the second optical film layer (123) for absorbing the ultraviolet rays.

7. The display device according to claim 6, characterized in that, The ultraviolet-absorbing film layer includes an ultraviolet absorber and a supporting substrate.

8. The display device according to claim 1, characterized in that, The protective glass (120) further includes a protective layer (125), which is disposed on the side of the first optical film layer (122) away from the glass substrate (121) for at least one of oil resistance, water resistance, and scratch resistance.

9. The display device according to claim 8, characterized in that, The protective layer (125) is either a silicon dioxide film or a diamond-like carbon film.

10. The display device according to claim 7, characterized in that, The thickness of the protective glass (120) is less than or equal to 4 mm; and / or, The protective glass (120) has a mechanical impact protection rating of 10 or higher; and / or, The visible light transmittance of the protective glass (120) is greater than 80%; and / or, The protective glass (120) has an ultraviolet blocking rate of greater than 95%; and / or, The infrared reflectivity of the protective glass (120) is greater than 95%.

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