Glass panels, displays and terminals

Abstract

This application provides a glass panel, including a glass panel substrate and a composite film layer disposed on the surface of the glass panel substrate. The composite film layer includes a first underlayer, a first barrier layer, a diamond-like carbon film layer, a second barrier layer, a second underlayer, and an anti-fingerprint layer, which are sequentially stacked. By depositing a composite film layer with a specific structure on the surface of the glass panel substrate, this glass panel can achieve a higher Mohs hardness to improve its scratch resistance. Furthermore, the composite film layer has strong adhesion to the substrate surface and is not easily peeled off. The composite film layer can also reduce color difference before and after coating to a certain extent and improve transmittance. This application also provides a display screen and a terminal incorporating this glass panel.

Description

Technical Field

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

[0002] Currently, glass panel displays are widely used in terminal devices such as mobile phones, tablets, and wearable products. To improve the scratch resistance of glass panels, the industry generally applies a protective film to the surface of the glass panel substrate, or directly coats the surface with a protective film. However, applying a protective film not only increases the cost of the device but also reduces the optical properties of the screen, affecting the product's appearance. Existing protective films have the following problems: limited improvement in the scratch resistance of the glass panel, insufficient adhesion leading to easy film peeling, significant color difference before and after coating, and significant reduction in transmittance. Summary of the Invention

[0003] In view of this, the present application provides a glass panel. By depositing a composite film layer with a specific structure on the surface of the glass panel substrate, the glass panel can have a higher Mohs hardness to improve the scratch resistance of the glass panel. Moreover, the composite film layer has strong adhesion to the substrate surface and is not easy to fall off. The composite film layer can also reduce the color difference before and after coating and improve the transmittance to a certain extent.

[0004] The first aspect of this application provides a glass panel, including a glass panel substrate and a composite film layer disposed on the surface of the glass panel substrate. The composite film layer includes a first underlayer, a first barrier layer, a diamond-like carbon film layer, a second barrier layer, a second underlayer, and an anti-fingerprint layer, which are stacked sequentially.

[0005] The materials of the first and second underlayers are independently selected from one or more of silicon oxide and aluminum oxide, and the materials of the first and second barrier layers are independently selected from SiN. x CN x SiC x SiN x C y One or more of the following, wherein the values ​​of x and y are in the range of 1-6; the thickness of the first substrate layer is 2nm-30nm, the thickness of the first barrier layer is 1nm-20nm, the thickness of the diamond-like carbon film layer is 3nm-40nm, the thickness of the second barrier layer is 1nm-20nm, the thickness of the second substrate layer is 2nm-30nm, the thickness of the anti-fingerprint layer is less than or equal to 20nm, and the thickness of the composite film layer is less than 100nm.

[0006] The glass panel provided in this application embodiment, by depositing a composite film layer on the surface of the glass panel substrate, can achieve high Mohs hardness, reduce color difference and transmittance difference before and after coating, and exhibit strong adhesion of the composite film layer to the substrate surface. In the composite film layer, the first underlayer is in contact with and stacked on the glass panel substrate. The first underlayer can improve the adhesion of the composite film layer to the glass panel substrate, reduce the risk of the composite film layer peeling off, and improve the reliability of the glass panel. The diamond-like carbon (DLC) film layer has high hardness, which can improve the scratch resistance of the glass panel and help reduce the total thickness of the composite film layer. In addition, the DLC film layer can also reduce the color difference before and after coating. The setting of the first barrier layer and the second barrier layer is conducive to improving the overall hardness of the glass panel, and can prevent adverse effects such as oxidation of the DLC film layer during the composite film layer preparation process and during the use of the glass panel, allowing the glass panel to better maintain high hardness for a longer period. The setting of the anti-fingerprint layer can reduce the residue of fingerprints, stains, etc. on the glass panel during use, improving the user experience. The setting of the second underlayer can improve the adhesion of the anti-fingerprint layer, allowing the glass panel to maintain long-term anti-fouling performance. In addition, by reasonably controlling the thickness of each layer in the composite film to a small value, the total thickness of the composite film is controlled below 100nm. Under the synergistic effect of each film layer, hardness, adhesion and optical performance can be well balanced, and the stress of the composite film layer is controlled at a low level. This effectively avoids the problems of changes in the surface shape of the glass panel substrate and the peeling off of the composite film layer caused by the stress of the film layer, improves the adhesion of the composite film layer on the surface of the glass panel substrate, and extends the service life of the composite film layer, thereby obtaining a glass panel with excellent comprehensive performance to better meet the needs of terminal equipment.

[0007] In this embodiment of the application, the composite film layer further includes a first optical film layer disposed between the first substrate and the first barrier layer, and / or a second optical film layer disposed between the second substrate and the second barrier layer; the first optical film layer and the second optical film layer are used to adjust the transmittance of the glass panel. The provision of the first optical film layer and / or the second optical film layer can effectively reduce the impact of the introduction of the composite film layer on the transmittance and hue of the glass panel, enabling the glass panel to still have high visible light transmittance after coating, thereby meeting the application requirements of the display screen.

[0008] The first and second optical film layers in this application are set up by using thin film interference to adjust and improve the optical performance of the composite film layer. Thin film interference refers to the interference phenomenon produced by the two reflected beams of light after a beam of light is reflected by the two surfaces of a thin film.

[0009] In this embodiment, the thickness of the first optical film layer is 5nm-30nm; the thickness of the second optical film layer is 5nm-20nm. Suitable thicknesses of the first and second optical film layers can effectively improve the optical performance of the composite film layer, optimize the hue and optical transmittance of the glass panel, and also ensure reliable adhesion to the glass panel surface.

[0010] In this embodiment, the first optical film layer and the second optical film layer are stacked structures formed by two or more sublayers, and the material of each sublayer is selected from oxides, nitrides, or SiAl of silicon, aluminum, niobium, titanium, or zirconium. x O y N z Any one or more of the above materials, where x, y, and z take values ​​in the range of 1-6. Using the above materials to prepare optical films can effectively improve the visible light transmittance of the composite film, thereby better reducing the adverse effects of the composite film on the transmittance of the glass panel substrate.

[0011] In this embodiment of the application, the first optical film layer includes at least one first sublayer and at least one second sublayer that are alternately stacked, and the first sublayer and the second sublayer have different refractive indices.

[0012] In this embodiment of the application, the first sub-layer has 1-12 layers, and the second sub-layer has 1-12 layers.

[0013] In this embodiment of the application, the second optical film layer includes at least one third sublayer and at least one fourth sublayer that are alternately stacked, and the third sublayer and the fourth sublayer have different refractive indices.

[0014] In this embodiment of the application, the third sub-layer has 1-12 layers, and the fourth sub-layer has 1-12 layers.

[0015] In this embodiment, the silicon oxide includes one or more of SiO2 and SiO; the aluminum oxide includes Al2O3. The use of silicon oxide and aluminum oxide coatings for the first and second undercoats allows for tight bonding with the glass panel substrate surface and increases the surface roughness of the glass panel substrate, thereby improving the adhesion of subsequent coating layers to the glass panel substrate surface.

[0016] In this embodiment of the application, the niobium oxide includes one or more of NbO, NbO2, Nb2O3, and Nb2O5; the titanium oxide includes TiO2; the zirconium oxide includes ZrO2; the silicon nitride includes Si3N4; the aluminum nitride includes AlN; the niobium nitride includes one or two of NbN and Nb2N; the titanium nitride can be TiN, TiN2, Ti2N, Ti3N, Ti4N, Ti3N4, Ti3N5, or Ti5N6; and the zirconium nitride includes ZrN.

[0017] Diamond-like carbon (DLC) films are amorphous carbon films containing a diamond-like structure. Their basic component is carbon, and they possess high hardness, high resistivity, and excellent optical properties. Carbon atoms can be categorized in various ways: diamond, where carbon atoms are bonded by sp3 bonds, and graphite, where carbon atoms are bonded by sp2 bonds. In DLC films, carbon atoms are bonded by both sp3 and sp2 bonds. DLC films are metastable, long-range disordered amorphous materials, and the bonds between carbon atoms are covalent, primarily consisting of sp2 and sp3 hybrid bonds. Therefore, DLC films combine the excellent properties of both diamond and graphite.

[0018] In this embodiment, the diamond-like carbon (DLC) film layer comprises a DLC film doped with any one or more doping elements selected from silicon, aluminum, titanium, zirconium, molybdenum, nitrogen, and hydrogen. By doping the DLC film with the above-mentioned elements, the hue influence caused by carbon hybridization can be effectively reduced. Together with the first underlayer, first barrier layer, second barrier layer, second underlayer, first optical film layer, and / or second optical film layer, the hue of the entire composite film layer is optimized, improving the appearance of the glass panel. It can also effectively improve the problem of poor visual experience caused by color difference between the composite film layer after partial peeling and the non-peeled parts.

[0019] In this embodiment, the atomic percentage of non-carbon elements in the diamond-like carbon film layer is less than 40%. Appropriate control of the non-carbon element content allows the diamond-like carbon film layer to achieve performance improvements through doping while better maintaining the original good properties of diamond-like carbon.

[0020] In this embodiment, sp3 hybrid bonds account for more than 30% of the total number of sp2 and sp3 hybrid bonds in the diamond-like carbon film layer. Maintaining a high proportion of sp3 hybrid bonds in the diamond-like carbon film layer is beneficial for obtaining higher hardness.

[0021] In this embodiment of the application, the atomic percentage of non-carbon elements and the proportion of sp3 hybrid bonds in the diamond-like carbon film layer can be determined using XPS (X-ray photoelectron spectroscopy).

[0022] In this embodiment, the Mohs hardness of the glass panel 100 is greater than or equal to 7. Using a Mineralab Mohs hardness tester, with a force of 750g, the coated surface of the glass panel 100 is scratched at a 45° angle. If no visible scratches are found, the glass panel 100 is considered to have passed the corresponding Mohs hardness test. A high Mohs hardness provides better scratch resistance, improving the glass panel's scratch resistance and enhancing the user experience.

[0023] In this embodiment, the composite film layer 20 withstands more than 10,000 cycles of rubber rubbing without detaching from the glass panel substrate 10. This value is achieved by rubbing the coated surface of the glass panel back and forth with a Minoan eraser, loaded with a 1000g weight, at a speed of 40 revolutions / min. A high number of cycles without detaching from rubber rubbing indicates strong adhesion of the composite film layer to the glass panel substrate, which can extend the service life of the composite film layer and improve the long-term reliability of the glass panel.

[0024] In this embodiment, the color difference value ΔE between the glass panel and the glass panel substrate is less than 1.5. That is, the color difference between the glass panel substrate before and after the composite film layer is applied is very small. The color difference value ΔE is a parameter generated as an auxiliary indicator of the Lab value; it is usually expressed numerically as the color difference, i.e., the degree of difference between two colors. The smaller the ΔE value, the closer the two colors are; conversely, the larger the ΔE value, the more obvious the difference between the colors. Therefore, ΔE can quantitatively measure the color difference between two colors. ΔE can be calculated using the following formula:

[0025]

[0026] Here, △L, △a, and △b represent the differences between two colors in brightness, along the a* axis, and the b* axis, respectively. In other words, these three factors together determine the degree of difference between colors. Therefore, the value of △E is actually produced by the combined effect of these three factors.

[0027] In this embodiment, the average transmittance of the glass panel in the wavelength range of 450nm-940nm is greater than or equal to 85%. The glass panel in this embodiment has high optical transmittance, which can improve the display effect of the display screen using this glass panel and enhance the user experience.

[0028] In this embodiment, the reduction in 550nm transmittance of the glass panel relative to the glass panel substrate is less than 0.5%, or the 550nm transmittance of the glass panel is greater than or equal to the 550nm transmittance of the glass panel substrate. The glass panel of this application utilizes a composite film layer with a special structure formed on the surface of the glass panel substrate. This composite film layer has minimal impact on the optical transmittance of the glass panel, and can even maintain the same or higher transmittance as the glass panel substrate.

[0029] A second aspect of this application provides a method for preparing a glass panel, comprising:

[0030] A composite film layer is deposited on the surface of a glass panel substrate. The composite film layer includes a first underlayer, a first barrier layer, a diamond-like carbon film layer, a second barrier layer, a second underlayer, and an anti-fingerprint layer, which are stacked sequentially.

[0031] The first substrate, the first barrier layer, the diamond-like carbon (DLC) film layer, the second barrier layer, and the second substrate are prepared by magnetron sputtering, and the anti-fingerprint layer is prepared by vapor deposition. The materials of the first substrate and the second substrate are independently selected from one or more of silicon oxide and aluminum oxide, and the materials of the first barrier layer and the second barrier layer are independently selected from SiN. x CN x SiC x SiN x C y One or more of the following, wherein the values ​​of x and y are in the range of 1-6; the thickness of the first substrate layer is 2nm-30nm, the thickness of the first barrier layer is 1nm-20nm, the thickness of the diamond-like carbon film layer is 3nm-40nm, the thickness of the second barrier layer is 1nm-20nm, the thickness of the second substrate layer is 2nm-30nm, the thickness of the anti-fingerprint layer is less than or equal to 20nm, and the thickness of the composite film layer is less than 100nm.

[0032] In this embodiment of the application, the composite film layer further includes:

[0033] A first optical film layer is disposed between the first substrate layer and the first barrier layer, and / or a second optical film layer is disposed between the second substrate layer and the second barrier layer; the first optical film layer and the second optical film layer are prepared by magnetron sputtering. The glass panel preparation method provided in this application is simple and easy to control, and can achieve mass production.

[0034] A third aspect of this application provides a display screen, including a display module and a glass panel covering the display module, wherein the glass panel includes the glass panel described in the first aspect of this application. The display screen using the glass panel of this application embodiment can better protect the display module and has a better display effect.

[0035] This application also provides a terminal, including a housing and a circuit board located inside the housing. The housing includes a display screen, which includes a glass panel and a display module disposed inside the glass panel. The glass panel includes the glass panel described in the first aspect of this application. The terminal using the glass panel of this application embodiment has good display effect. This terminal can be a mobile phone, tablet computer, laptop computer, wearable product (watch, bracelet, glasses), in-vehicle equipment, or other terminal device. Attached Figure Description

[0036] Figure 1 A schematic cross-sectional view of a glass panel 100 provided in an embodiment of this application;

[0037] Figure 2 A schematic cross-sectional view of a glass panel 100 provided in another embodiment of this application;

[0038] Figure 3 A schematic cross-sectional view of a glass panel 100 provided in another embodiment of this application;

[0039] Figure 4 A schematic cross-sectional view of a glass panel 100 provided in another embodiment of this application;

[0040] Figure 5 This is a schematic cross-sectional view of the first optical film layer 27 in an embodiment of this application;

[0041] Figure 6 This is a schematic cross-sectional view of the second optical film layer 28 in an embodiment of this application;

[0042] Figure 7 A schematic cross-sectional view of the display screen 200 provided in this embodiment of the application;

[0043] Figure 8 A schematic cross-sectional view of the terminal 300 provided in the embodiments of this application;

[0044] Figure 9 The transmittance curve of the glass panel prepared in Example 1 of this application;

[0045] Figure 10 The transmittance curve of the glass panel prepared in Example 2 of this application;

[0046] Figure 11 The transmittance curve of the glass panel prepared in Example 3 of this application. Detailed Implementation

[0047] The embodiments of this application will now be described in conjunction with the accompanying drawings.

[0048] Currently, glass panels are used to cover display components in terminal devices such as mobile phones, tablets, and wearable products. To improve the scratch resistance of glass panels, a common industry practice is to coat the surface of the glass panel substrate with a protective film. However, existing protective films have several problems: limited improvement in scratch resistance, insufficient adhesion leading to easy film peeling, significant color difference before and after coating, and significant reduction in transmittance. To address these issues to some extent, this application provides a glass panel that, by coating a composite film layer with a specific structure onto the glass panel substrate, can give the glass panel a higher Mohs hardness to improve scratch resistance. Furthermore, the composite film layer has strong adhesion to the substrate surface and is not easily peeled off. This composite film layer can also reduce color difference before and after coating and improve transmittance to some extent.

[0049] See Figure 1 , Figure 1 This is a schematic diagram of the cross-sectional structure of a glass panel provided in an embodiment of this application. The glass panel 100 provided in this embodiment includes a glass panel substrate 10 and a composite film layer 20 disposed on the surface of the glass panel substrate 10. The composite film layer 20 includes, from the surface of the glass panel substrate 10 outwards, a first underlayer 21, a first barrier layer 22, a diamond-like carbon film layer 23, a second barrier layer 24, a second underlayer 25, and an anti-fingerprint layer 26, which are stacked sequentially.

[0050] The materials of the first substrate 21 and the second substrate 25 are independently selected from one or more of silicon oxide and aluminum oxide, and the materials of the first barrier layer 22 and the second barrier layer 24 are independently selected from SiN. x CN x SiC x SiN x C y One or more of the following, wherein the values ​​of x and y are in the range of 1-6; the thickness of the first substrate 21 is 2nm-30nm, the thickness of the first barrier layer 22 is 1nm-20nm, the thickness of the diamond-like carbon film layer 23 is 3nm-40nm, the thickness of the second barrier layer 24 is 1nm-20nm, the thickness of the second substrate 25 is 2nm-30nm, the thickness of the anti-fingerprint layer 26 is less than or equal to 20nm, and the thickness of the composite film layer 20 is less than 100nm.

[0051] The glass panel provided in this application embodiment, by depositing a composite film layer on the surface of the glass panel substrate, can achieve high Mohs hardness, reduce color difference and transmittance difference before and after coating, and exhibit strong adhesion of the composite film layer to the substrate surface. In the composite film layer, the first underlayer is in contact with and stacked on the glass panel substrate. The first underlayer can improve the adhesion of the composite film layer to the glass panel substrate, reduce the risk of the composite film layer peeling off, and improve the reliability of the glass panel. The diamond-like carbon (DLC) film layer has high hardness, which can improve the scratch resistance of the glass panel and help reduce the total thickness of the composite film layer. In addition, the DLC film layer can also reduce the color difference before and after coating. The first and second barrier layers contribute to the overall hardness of the glass panel and can prevent adverse effects such as oxidation of the DLC film layer during the composite film preparation process and during the use of the glass panel, allowing the glass panel to better maintain its high hardness over a long period. The anti-fingerprint layer can reduce the residue of fingerprints and stains on the glass panel during use, improving the user experience. The second underlayer can improve the adhesion of the anti-fingerprint layer, allowing the glass panel to maintain long-term anti-fouling performance. In addition, by reasonably controlling the thickness of each layer in the composite film to a small value, the total thickness of the composite film is controlled below 100nm. Under the synergistic effect of each film layer, hardness, adhesion and optical performance can be well balanced, and the stress of the composite film layer is controlled at a low level. This effectively avoids the problems of changes in the surface shape of the glass panel substrate and the peeling off of the composite film layer caused by the stress of the film layer, improves the adhesion of the composite film layer on the surface of the glass panel substrate, and extends the service life of the composite film layer, thereby obtaining a glass panel with excellent comprehensive performance to better meet the needs of terminal equipment.

[0052] In this embodiment, the first underlayer 21 includes one or more of silicon oxide and aluminum oxide. The silicon oxide can be, for example, silicon dioxide (SiO2) or silicon suboxide (SiO). The aluminum oxide can be, for example, aluminum trioxide (Al2O3). The first underlayer 21 is in contact with the glass panel substrate 10. The use of silicon oxide and aluminum oxide coatings in the first underlayer 21 allows for tight bonding with the surface of the glass panel substrate 10 and improves the surface roughness of the glass panel substrate 10, thereby enhancing the adhesion of subsequently deposited films to the surface of the glass panel substrate 10.

[0053] In this embodiment, the thickness of the first substrate 21 can be 2nm-30nm. In some embodiments, the thickness of the first substrate 21 can be, for example, 2nm, 3nm, 5nm, 6nm, 8nm, 10nm, 12nm, 14nm, 15nm, 17nm, 18nm, 20nm, 22nm, 25nm, 28nm, or 30nm. The first substrate, with its suitable thickness, connects the glass panel substrate and the first barrier layer, ensuring a strong bond between the film structure on the first substrate and the glass panel substrate, while maintaining a relatively small total thickness of the composite film.

[0054] In this embodiment, the material of the first barrier layer 22 is selected from SiN. x CN x SiC x SiN x C y One or more of the above materials are used, wherein the values ​​of x and y are in the range of 1-6. Specifically, the values ​​of x and y can be selected from 1, 2, 3, 4, 5, and 6, respectively. The first barrier layer 22 can achieve higher hardness by using the above materials, and can better protect the diamond-like carbon film layer from oxidation or doping with other impurities that affect its performance during preparation and use, which is also conducive to achieving a low thickness setting for the diamond-like carbon film layer.

[0055] In this embodiment, the thickness of the first barrier layer 22 is 1nm-20nm. In some embodiments, the thickness of the first barrier layer 22 can be, for example, 1nm, 2nm, 3nm, 5nm, 6nm, 8nm, 10nm, 12nm, 14nm, 15nm, 17nm, 18nm, or 20nm. A smaller thickness of the first barrier layer can improve the overall adhesion of the composite film layer and enhance the overall performance of the glass panel.

[0056] In some embodiments of this application, the first substrate and the first barrier layer have different refractive indices; the first substrate is silicon oxide, and the first barrier layer is SiN. x CN x SiC x or SiN x C y In some embodiments of this application, the first substrate is an aluminum oxide, and the first barrier layer is SiN. x CN x SiC x or SiN x C y .

[0057] Diamond-like carbon (DLC) films are amorphous carbon films containing a diamond-like structure. Their basic component is carbon, and they possess high hardness, high resistivity, and excellent optical properties. Carbon atoms can be categorized in various ways: diamond, where carbon atoms are bonded by sp3 bonds, and graphite, where carbon atoms are bonded by sp2 bonds. In DLC films, carbon atoms are bonded by both sp3 and sp2 bonds. DLC films are metastable, long-range disordered amorphous materials, and the bonds between carbon atoms are covalent, primarily consisting of sp2 and sp3 hybrid bonds. Therefore, DLC films combine the excellent properties of both diamond and graphite.

[0058] In this embodiment, the diamond-like carbon (DLC) film layer 23 comprises a DLC film doped with one or more elements selected from silicon, aluminum, titanium, zirconium, molybdenum, nitrogen, and hydrogen. Doping the DLC film with these elements helps to improve the hardness of the DLC film layer and / or reduce the hue effect caused by carbon hybridization, optimize the hue of the entire composite film layer, improve the appearance and display effect of the glass panel, and better avoid the problem of poor visual experience caused by color difference between the composite film layer after partial delamination and the non-delamination portion. In some embodiments, the DLC film layer 23 includes one doping element, for example, it is a nitrogen-doped diamond film layer, a silicon-doped diamond film layer, an aluminum-doped diamond film layer, a titanium-doped diamond film layer, a zirconium-doped diamond film layer, or a molybdenum-doped diamond film layer. In some embodiments, the DLC film layer 23 includes two or more doping elements, for example, it is a nitrogen-silicon co-doped diamond film layer, a nitrogen-aluminum co-doped diamond film layer, etc.

[0059] In this embodiment, the atomic percentage of non-carbon elements in the diamond-like carbon (DLC) film layer is less than 40%. In some embodiments, the atomic percentage of non-carbon elements in the DLC film layer is 1%-40%, for example, 1%, 2%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, and 39%. Non-carbon elements include the doping elements mentioned above. Appropriate control of the non-carbon element content allows the DLC film layer to achieve performance improvements due to doping while better maintaining the original good properties of DLC.

[0060] In this embodiment, sp3 hybrid bonds account for more than 30% of the total number of sp2 and sp3 hybrid bonds in the diamond-like carbon (DLC) film layer. In some embodiments, the proportion of sp3 hybrid bonds is more than 40%, 45%, 50%, 60%, or 70%. Maintaining a high proportion of sp3 hybrid bonds in the DLC film layer is beneficial for achieving higher hardness.

[0061] In this embodiment, the thickness of the diamond-like carbon (DLC) film layer 23 is 3nm-40nm. In some embodiments, the thickness of the DLC film layer 23 is 3nm, 5nm, 10nm, 15nm, 20nm, 25nm, 30nm, 35nm, or 40nm. Controlling the thickness of the DLC film layer within this range can effectively improve the hardness of the glass panel, thereby enhancing its scratch resistance. It also allows the total thickness of the composite film layer to be kept at a small value, improving its adhesion to the glass panel substrate surface.

[0062] See Figure 2 , Figure 3 and Figure 4 , Figure 2 A schematic cross-sectional view of a glass panel 100 provided in another embodiment of this application; Figure 3 A schematic cross-sectional view of a glass panel 100 provided in another embodiment of this application; Figure 4 This is a cross-sectional structural diagram of a glass panel 100 provided in another embodiment of this application. In this embodiment, the composite film layer 20 further includes a first optical film layer 27 disposed between the first substrate 21 and the first barrier layer 22, and / or a second optical film layer 28 disposed between the second substrate 25 and the second barrier layer 24; the first optical film layer 27 and the second optical film layer 28 are used to adjust the transmittance of the glass panel. The provision of the first optical film layer and / or the second optical film layer can effectively reduce the influence of the introduction of the composite film layer on the transmittance and hue of the glass panel, so that the glass panel can still have high visible light transmittance after coating, thereby meeting the application requirements of the display screen.

[0063] The first and second optical film layers in this application are set up by using thin film interference to adjust and improve the optical performance of the composite film layer. Thin film interference refers to the interference phenomenon produced by the two reflected beams of light after a beam of light is reflected by the two surfaces of a thin film.

[0064] In some embodiments of this application, such as Figure 2 As shown, the composite film layer 20 includes a first optical film layer 27 disposed between the first substrate layer 21 and the first barrier layer 22, but does not include the second optical film layer 28. In some embodiments of this application, such as... Figure 3 As shown, the composite film layer 20 includes a second optical film layer 28 disposed between the second substrate 25 and the second barrier layer 24, but does not include the first optical film layer 27. In some embodiments of this application, such as... Figure 4 As shown, the composite film layer 20 includes a first optical film layer 27 disposed between the first substrate 21 and the first barrier layer 22, and a second optical film layer 28 disposed between the second substrate 25 and the second barrier layer 24.

[0065] The first optical film layer 27 and the second optical film layer 28 in this application are provided to adjust and improve the optical performance of the composite film layer 20 by using thin film interference. Thin film interference refers to the interference phenomenon generated by the two reflected beams of light after a beam of light is reflected by the two surfaces of a thin film.

[0066] In this embodiment, both the first optical film layer 27 and the second optical film layer 28 are stacked structures formed by two or more sublayers, and the material of each sublayer is independently selected from oxides, nitrides, SiAl, or zirconium oxides, nitrides, etc. of silicon, aluminum, niobium, titanium, or zirconium. x O y N z The first optical film layer 27 and the second optical film layer 28 can be any one or more of the following materials, where the values ​​of x, y, and z are in the range of 1-6. The first optical film layer 27 and the second optical film layer 28 can be composed of two or more materials with different refractive indices to form two or more sublayers with different refractive indices. For example, silicon oxide can be silicon dioxide (SiO2), silicon suboxide (SiO), etc. Aluminum oxide can be aluminum trioxide (Al2O3), for example. Niobium oxide can be niobium monoxide, niobium dioxide, niobium trioxide, niobium pentoxide, or a mixture of two or more of these. Titanium oxide can be titanium dioxide, and zirconium oxide can be zirconium dioxide. Silicon nitride can be silicon nitride Si3N4, aluminum nitride can be aluminum nitride AlN, niobium nitride can be NbN, Nb2N, titanium nitride can be TiN, TiN2, Ti2N, Ti3N, Ti4N, Ti3N4, Ti3N5, Ti5N6, and zirconium nitride can be ZrN. x O y N z The values ​​of x, y, and z can be selected from 1, 2, 3, 4, 5, and 6, respectively. Using the above materials to prepare the optical film layer can effectively improve the visible light transmittance of the composite film layer, thereby better reducing the adverse effects of the composite film layer on the transmittance of the glass panel substrate.

[0067] See Figure 5 , Figure 5This is a schematic cross-sectional view of the first optical film layer 27 according to an embodiment of this application. The first optical film layer 27 includes at least one first sub-layer 271 and at least one second sub-layer 272 alternately stacked. The refractive index of the first sub-layer 271 is different from that of the second sub-layer 272. For example, the refractive index of the first sub-layer 271 may be less than that of the second sub-layer 272. The first optical film layer 27 can contact the first substrate 21 with either the first sub-layer 271 or the second sub-layer 272; the first optical film layer 27 can contact the first barrier layer 22 with either the first sub-layer 271 or the second sub-layer 272. In this application, the number of first sub-layers 271 and the number of second sub-layers 272 in the first optical film layer 27 can be 1-12. Specifically, the number of layers 1-12 can be, for example, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12. The number of layers in the first sublayer 271 and the second sublayer 272 can be the same or different. Understandably, the materials of the first sublayer 271 and the second sublayer 272 can be oxides, nitrides, or SiAl oxides selected from silicon, aluminum, niobium, titanium, or zirconium. x O y N z Any one or more of the following. In some embodiments, the first sublayer 271 is silicon nitride (Si3N4), and the second sublayer 272 is silicon dioxide (SiO2). In some embodiments, the first sublayer 271 is silicon nitride (Si3N4), and the second sublayer 272 is aluminum oxide (Al2O3).

[0068] See Figure 6 , Figure 6 This is a schematic cross-sectional view of the second optical film layer 28 according to an embodiment of this application. The second optical film layer 28 includes at least one third sub-layer 281 and at least one fourth sub-layer 282 alternately stacked. The refractive index of the third sub-layer 281 is different from that of the fourth sub-layer 282. For example, the refractive index of the third sub-layer 281 may be less than that of the fourth sub-layer 282. The second optical film layer 28 in contact with the second substrate 25 may be either the third sub-layer 281 or the second sub-layer 282; the second optical film layer 28 in contact with the second barrier layer 24 may be either the third sub-layer 281 or the fourth sub-layer 282. In this application, the number of third sub-layers 281 and the number of fourth sub-layers 282 in the second optical film layer 28 may be 1-12. Specifically, layers 1-12 can be, for example, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12 layers. The third sublayer 281 and the fourth sublayer 282 can have the same or different number of layers. Understandably, the materials of the third sublayer 281 and the fourth sublayer 282 can be oxides, nitrides, or SiAl oxides selected from silicon, aluminum, niobium, titanium, or zirconium. x Oy N z Any one or more of the following. In some embodiments, the third sublayer 281 is silicon nitride (Si3N4), and the fourth sublayer 282 is silicon dioxide (SiO2). In some embodiments, the third sublayer 281 is silicon nitride (Si3N4), and the fourth sublayer 282 is aluminum oxide (Al2O3).

[0069] In this application, when the composite film layer 20 simultaneously includes a first optical film layer 27 and a second optical film layer 28, the first optical film layer 27 and the second optical film layer 28 may have the same composition or different composition. The number of sublayers included in the first optical film layer 27 and the second optical film layer 28 may be the same or different. The thickness of the first optical film layer 27 and the second optical film layer 28 may be the same or different.

[0070] In this embodiment, the thickness of the first optical film layer 27 is 5nm-30nm. In some embodiments, the thickness of the first optical film layer 27 is 5nm, 6nm, 8nm, 10nm, 12nm, 15nm, 18nm, 20nm, 22nm, 25nm, or 30nm. A suitable thickness of the first optical film layer can effectively improve the optical performance of the composite film layer, optimize the hue and optical transmittance of the glass panel, and also ensure its reliable adhesion to the surface of the glass panel.

[0071] In this embodiment, the thickness of the second optical film layer 28 is 5nm-20nm. In some embodiments, the thickness of the second optical film layer 28 is 5nm, 6nm, 8nm, 10nm, 12nm, 15nm, 18nm, or 20nm. A suitable thickness of the second optical film layer can effectively improve the optical performance of the composite film layer, optimize the hue and optical transmittance of the glass panel, and also ensure its reliable adhesion to the surface of the glass panel.

[0072] In this embodiment, the second substrate 25 comprises one or more of silicon oxide and aluminum oxide. The silicon oxide may be, for example, silicon dioxide (SiO2) or silicon suboxide (SiO). The aluminum oxide may be, for example, aluminum trioxide (Al2O3). The second substrate 25 is in contact with the anti-fingerprint layer 26, and the use of silicon oxide and aluminum oxide coatings on the second substrate 25 enables the anti-fingerprint layer 26 to be tightly bonded to the glass panel substrate.

[0073] In this embodiment, the thickness of the second substrate 25 can be 2nm-30nm. In some embodiments, the thickness of the second substrate 25 can be, for example, 2nm, 3nm, 5nm, 6nm, 8nm, 10nm, 12nm, 14nm, 15nm, 17nm, 18nm, 20nm, 22nm, 25nm, 28nm, or 30nm. Setting the second substrate to a suitable thickness can ensure a strong bond between the anti-fingerprint layer and the glass panel substrate, while also keeping the composite film layer at a relatively small total thickness.

[0074] In this embodiment, the material of the second barrier layer 24 is selected from SiN. x CN x SiC x SiN x C y One or more of the above materials are used, wherein the values ​​of x and y are in the range of 1-6. Specifically, the values ​​of x and y can be selected from 1, 2, 3, 4, 5, and 6, respectively. The second barrier layer 24 can achieve higher hardness by using the above materials, and can better protect the diamond-like carbon film layer from oxidation or doping with other impurities that affect performance during use, which is also conducive to achieving a low thickness setting for the diamond-like carbon film layer.

[0075] In this embodiment, the thickness of the second barrier layer 24 is 1nm-20nm. In some embodiments, the thickness of the second barrier layer 24 can be, for example, 1nm, 2nm, 3nm, 5nm, 6nm, 8nm, 10nm, 12nm, 14nm, 15nm, 17nm, 18nm, or 20nm. A smaller thickness of the second barrier layer can improve the overall adhesion of the composite film layer and enhance the overall performance of the glass panel.

[0076] In some embodiments of this application, the second substrate and the second barrier layer have different refractive indices; the second substrate is silicon oxide, and the second barrier layer is SiN. x CN x SiC x or SiN x C y In some embodiments of this application, the second substrate is an aluminum oxide, and the second barrier layer is SiN. x CN x SiC x or SiN x C y .

[0077] In the composite film layer 20 of this application, the materials and thicknesses of the first substrate 21 and the second substrate 25 may be the same or different. The materials and thicknesses of the first barrier layer 22 and the second barrier layer 24 may be the same or different.

[0078] In this embodiment, the material of the anti-fingerprint layer 26 is not limited, as long as it can achieve the anti-fingerprint effect. For example, it can be a fluorinated material, such as perfluoropolyether.

[0079] In this embodiment, the thickness of the anti-fingerprint layer 26 is less than or equal to 20 nm. In some embodiments, the thickness of the anti-fingerprint layer 26 is 3 nm to 20 nm. In some embodiments, the thickness of the anti-fingerprint layer 26 is 3 nm, 5 nm, 6 nm, 8 nm, 10 nm, 12 nm, 15 nm, 18 nm, or 20 nm. Controlling the thickness of the anti-fingerprint layer to a smaller value can better control the total thickness of the composite film layer to a smaller value, thereby improving its adhesion to the surface of the glass panel substrate.

[0080] In this embodiment, the thickness of the composite film layer 20 is less than 100 nm. In some embodiments, the thickness of the composite film layer 20 is 10 nm, 20 nm, 30 nm, 40 nm, 50 nm, 55 nm, 60 nm, 65 nm, 70 nm, 75 nm, 80 nm, 85 nm, 90 nm, 95 nm, or 100 nm. Controlling the total thickness of the composite film layer to below 100 nm can keep the stress of the composite film layer at a low level, effectively avoiding problems such as changes in the surface shape of the glass panel substrate and peeling off the composite film layer caused by film layer stress, improving the adhesion of the composite film layer to the surface of the glass panel substrate, and extending the service life of the composite film layer; in addition, it can minimize the color difference in the appearance of the glass panel before and after coating, improving the user experience.

[0081] In this embodiment, the glass panel substrate 10 can be either microcrystalline glass or ordinary glass. To improve the mechanical properties of the glass panel, chemically strengthened microcrystalline glass or chemically strengthened ordinary glass can be used. The thickness and performance parameters of the glass panel substrate 10 can be selected according to actual needs.

[0082] In this embodiment, the Mohs hardness of the glass panel 100 is greater than or equal to 7. Using a Mineralab Mohs hardness tester, with a force of 750g, the coated surface of the glass panel 100 is scratched at a 45° angle. If no visible scratches are found, the glass panel 100 is considered to have passed the corresponding Mohs hardness test. A high Mohs hardness provides better scratch resistance, improving the glass panel's scratch resistance and enhancing the user experience.

[0083] In this embodiment, the composite film layer 20 withstands more than 10,000 cycles of rubber rubbing without detaching from the glass panel substrate 10. This value is achieved by rubbing the coated surface of the glass panel back and forth with a Minoan eraser, loaded with a 1000g weight, at a speed of 40 revolutions / min. A high number of cycles without detaching from rubber rubbing indicates strong adhesion of the composite film layer to the glass panel substrate, which can extend the service life of the composite film layer and improve the long-term reliability of the glass panel.

[0084] In this embodiment, the color difference value ΔE between the glass panel 100 and the glass panel substrate 10 is less than 1.5. In some embodiments, the color difference value ΔE between the glass panel 100 and the glass panel substrate 10 is less than 1.0. In this embodiment, the color difference value ΔE between the glass panel 100 and the glass panel substrate 10 is less than 0.5. That is, the color difference of the glass panel substrate before and after the composite film layer is deposited is very small. The color difference value ΔE is a parameter generated as an auxiliary index of the Lab value. It is usually expressed in numerical form as the color difference, that is, the degree of difference between two colors. The smaller the value of ΔE, the closer the two colors are; conversely, the larger the value of ΔE, the more obvious the difference between the colors. Therefore, ΔE can quantitatively measure the color difference between two colors. ΔE can be calculated using the following formula:

[0085]

[0086] Here, △L, △a, and △b represent the differences between two colors in brightness, along the a* axis, and the b* axis, respectively. In other words, these three factors together determine the degree of difference between colors. Therefore, the value of △E is actually produced by the combined effect of these three factors.

[0087] In this embodiment, the average transmittance of the glass panel 100 in the wavelength range of 450nm-940nm is greater than or equal to 85%. In some embodiments, the average transmittance of the glass panel 100 in the wavelength range of 450nm-940nm is greater than or equal to 88%. In some embodiments, the average transmittance of the glass panel 100 in the wavelength range of 450nm-940nm is greater than or equal to 90%. The glass panel in this embodiment has high optical transmittance, which can improve the display effect of the display screen using the glass panel and enhance the user experience.

[0088] In this application embodiment, the reduction in 550nm transmittance of the glass panel 100 relative to the glass panel substrate 10 is less than 0.5%. The reduction in 550nm transmittance of the glass panel 100 relative to the glass panel substrate 10 is less than 0.3%. In some embodiments of this application, the 550nm transmittance of the glass panel is greater than or equal to the 550nm transmittance of the glass panel substrate. The glass panel of this application utilizes a composite film layer with a special structure deposited on the surface of the glass panel substrate. This composite film layer has minimal impact on the optical transmittance of the glass panel, and can even maintain the same or higher transmittance as the glass panel substrate, thus ensuring that the glass panel still has high transmittance after the composite film layer is deposited.

[0089] The glass panel of this application embodiment has high Mohs hardness, small color difference before and after coating, small difference in transmittance, and strong adhesion of the composite film layer to the substrate surface. This glass panel can be used in terminal device displays to improve product competitiveness.

[0090] This application also provides a method for preparing the above-mentioned glass panel, including:

[0091] A composite film layer is deposited on the surface of a glass panel substrate. The composite film layer includes a first underlayer, a first barrier layer, a diamond-like thin film layer, a second barrier layer, a second underlayer, and an anti-fingerprint layer, which are stacked sequentially.

[0092] The first base layer, the first barrier layer, the diamond-like carbon film layer, the second barrier layer, and the second base layer are prepared by magnetron sputtering, while the anti-fingerprint layer is prepared by vapor deposition.

[0093] In this embodiment of the application, the composite film layer further includes a first optical film layer disposed between the first substrate and the first barrier layer, and / or a second optical film layer disposed between the second substrate and the second barrier layer; the first optical film layer and the second optical film layer are prepared by magnetron sputtering.

[0094] In one embodiment of this application, the method for preparing the glass panel may include:

[0095] The cleaned glass panel substrate is placed in a sputtering coating machine. First, a first underlayer is deposited on the surface of the glass panel substrate. Then, a first barrier layer is deposited on the first underlayer. Next, a nitrogen-doped diamond-like carbon (DLC) thin film layer is deposited on the first barrier layer. Then, a second barrier layer is deposited on the nitrogen-doped DLC thin film layer. A second underlayer is deposited on the second barrier layer. Finally, an anti-fingerprint layer (AF) is vapor-deposited on the second underlayer to obtain the glass panel.

[0096] The glass panel preparation method provided in this application is simple and easy to control, and can be mass-produced.

[0097] See Figure 7 , Figure 7This is a cross-sectional structural diagram of the display screen 200 provided in this embodiment of the application. The display screen 200 provided in this embodiment of the application includes a display screen module 201 and a glass panel 100 covering the display screen module. The glass panel body 10 of the glass panel 100 is in direct contact with the display screen module 201. The glass panel 100 is used to provide protection for the display screen module 201 and can also be touched by the user. The display screen using the glass panel of this embodiment of the application can better protect the display screen module and has a better display effect.

[0098] See Figure 8 , Figure 8 This is a cross-sectional structural diagram of the terminal 300 provided in this application embodiment. The terminal 300 provided in this application embodiment includes a housing 301 and a circuit board located inside the housing 301. Figure 8 (Not shown), the housing 301 includes a display screen 200, which includes a glass panel 100 and a display module 201 disposed inside the glass panel 100. Terminals using the glass panel of this embodiment have excellent display performance. This terminal can be a mobile phone, tablet computer, laptop computer, wearable product (watch, bracelet, glasses), in-vehicle equipment, or other terminal device.

[0099] The embodiments of this application will be further described below through multiple examples.

[0100] Transmittance and color difference were tested using optical testing equipment such as the CM3600a. Hardness testing was performed using a Mineralab Mohs hardness tester, applying a force of 750g and scratching the coated surface of the glass panel at a 45° angle. If no visible scratches were found, the glass panel was considered to have passed the corresponding Mohs hardness test. Abrasion resistance testing was conducted using a Minoan eraser, loaded with a 1000g weight, at a speed of 40 revolutions / min, rubbing back and forth on the coated surface of the glass panel. One round of rubbing was counted as one abrasion test.

[0101] Example 1

[0102] The cleaned glass panel substrate is placed in a sputtering coating machine. First, a 6nm thick SiO2 underlayer is deposited on the surface of the glass panel substrate. Then, a first optical film and a first barrier layer with a stacked structure of Si3N4 / SiO2 / Si3N4 / SiO2 / Si3N4 are deposited on the underlayer. The total thickness of the first optical film and the first barrier layer is 30nm. Next, a 20nm thick nitrogen-doped diamond-like carbon (DLC) thin film is deposited on the first optical film. Finally, a... The stacked structure consists of a second optical film layer, a second barrier layer, and a second base layer, all of which have a total thickness of 20 nm. Finally, an AF anti-fingerprint layer with a thickness of 8 nm is deposited on the second optical film layer to obtain a glass panel. Its stacked structure is glass / SiO2 / Si3N4 / SiO2 / Si3N4 / SiO2 / Si3N4 / Nitrogen-doped diamond-like carbon film layer / Si3N4 / SiO2 / Si3N4 / SiO2 / AF.

[0103] Performance tests are as follows:

[0104] 1. Transmittance:

[0105] wavelength 450nm 550nm 650nm 750nm 850nm 940nm Transmittance after coating 91.4％ 91.6％ 91.8％ 91.9％ 92.2％ 92.3％ transmittance before coating 89.9％ 90.8％ 91.2％ 91.5％ 92％ 92.1％

[0106] Figure 9 The transmittance curve is for the glass panel prepared in Example 1.

[0107] 2. Hardness test:

[0108] A Mohs hardness of 6 is passed, a Mohs hardness of 7 is passed, and a Mohs hardness of 8 is not passed.

[0109] 3. Friction resistance test:

[0110] It can withstand more than 10,000 rubber rubs.

[0111] 4. Color difference test:

[0112] Test results: The color difference before and after coating is less than 0.5.

[0113] Example 2

[0114] The cleaned glass panel substrate is placed in a sputtering coating machine. First, a 15nm thick SiO2 underlayer is deposited on the surface of the glass panel substrate. Then, a first optical film and a first barrier layer with a stacked structure of Si3N4 / Al2O3 / Si3N4 / Al2O3 / Si3N4 are deposited on the underlayer. The total thickness of the first optical film and the first barrier layer is 20nm. Next, a 20nm thick nitrogen-doped diamond-like carbon film is deposited on the first optical film. Finally, a stacked structure is deposited on the nitrogen-doped diamond-like carbon film. The structure consists of a second optical film, a second barrier layer, and a second base layer, all with a total thickness of 15 nm. Finally, a 10 nm thick anti-fingerprint layer (AF) is deposited on the second optical film to obtain a glass panel. The stacked structure is glass / SiO2 / Si3N4 / Al2O3 / Si3N4 / Al2O3 / Si3N4 / Nitrogen-doped diamond-like carbon film / Si3N4 / Al2O3 / Si3N4 / Al2O3 / AF.

[0115] Performance tests are as follows:

[0116] 1. Transmittance test:

[0117] wavelength 450nm 550nm 650nm 750nm 850nm 940nm Transmittance after coating 88.2％ 90.8％ 91.6％ 92.0％ 92.5％ 92.6％

[0118] Figure 10 The transmittance curve is for the glass panel prepared in Example 2.

[0119] 2. Hardness test:

[0120] A Mohs hardness of 6 is passed, a Mohs hardness of 7 is passed, and a Mohs hardness of 8 is not passed.

[0121] 3. Friction resistance test:

[0122] It can withstand more than 10,000 rubber rubs.

[0123] 4. Color difference test:

[0124] Test results: The color difference before and after coating is less than 0.5.

[0125] Example 3

[0126] The cleaned glass panel substrate is placed in a sputtering coating machine. First, a 10nm thick SiO2 first underlayer is deposited on the surface of the glass panel substrate. Then, a 20nm thick SiC first barrier layer is deposited on the first underlayer. Next, a 10nm thick nitrogen-doped diamond-like carbon (DLC) thin film is deposited on the first barrier layer. Then, a second barrier layer and a second underlayer with a SiC / SiO2 stacked structure are deposited on the nitrogen-doped DLC thin film, with a total thickness of 10nm. Finally, a 15nm thick anti-fingerprint layer (AF) is evaporated on the second underlayer to obtain the glass panel, whose stacked structure is glass / SiO2 / SiC / nitrogen-doped DLC thin film / SiC / SiO2 / AF.

[0127] Performance tests are as follows:

[0128] 1. Transmittance test:

[0129] wavelength 450nm 550nm 650nm 750nm 850nm 940nm Transmittance after coating 86.8％ 88.7％ 89.9％ 90.7％ 91.4％ 92.1％

[0130] Figure 11 The transmittance curve is for the glass panel prepared in Example 3.

[0131] 2. Hardness test:

[0132] A Mohs hardness of 6 is passed, a Mohs hardness of 7 is passed, and a Mohs hardness of 8 is not passed.

[0133] 3. Friction resistance test:

[0134] It can withstand more than 10,000 rubber rubs.

[0135] 4. Color difference test:

[0136] Test results: The color difference before and after coating is less than 0.5.

[0137] As can be seen from the above results, the glass panel of this application embodiment, by setting a composite film layer with a specific structure and a thickness of less than 100nm on the surface of the glass panel substrate, exhibits a small change in transmittance before and after coating, and still has high transmittance after coating the composite film layer. This indicates that the composite film layer of this application embodiment has little impact on the transmittance of the glass panel; the composite film layer has high Mohs hardness, which can improve the scratch resistance of the glass panel; the composite film layer has strong adhesion to the glass panel substrate, and the composite film layer does not fall off after more than 10,000 rubber rubbing cycles. In this way, the composite film layer can be firmly bonded to the surface of the glass panel substrate during service, providing long-term protection to the substrate.

[0138] It should be understood that the use of the terms "first," "second," and various numerical designations in this document is merely for descriptive convenience and is not intended to limit the scope of this application.

[0139] In this application, "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone, where A and B can be singular or plural. The character " / " generally indicates that the related objects before and after it are in an "or" relationship.

[0140] In this application, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, "at least one of a, b, or c", or "at least one of a, b, and c", can both mean: a, b, c, ab (i.e., a and b), ac, bc, or abc, where a, b, and c can be single or multiple.

[0141] In this application, "-" indicates a range value, including the endpoint values ​​at both ends. For example, the value of a can be 0.5-15, meaning that the value of a can be between 0.5 and 15, and includes the endpoint values ​​of 0.5 and 15.

[0142] It should be understood that in the various embodiments of this application, the order of the above processes does not imply the order of execution. Some or all steps may be executed in parallel or sequentially. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

Claims

1. A glass panel, characterized in that, The composite film includes a glass panel substrate and a composite film layer disposed on the surface of the glass panel substrate. The composite film layer includes a first underlayer, a first barrier layer, a diamond-like carbon film layer, a second barrier layer, a second underlayer, and an anti-fingerprint layer, which are stacked sequentially. The materials of the first and second underlayer layers are independently selected from one or more of silicon oxide and aluminum oxide, and the material of the first barrier layer is selected from CN. x SiC x SiN x C y One or more of the following, wherein the material of the second barrier layer is selected from SiN x CN x SiC x SiN x C y One or more of the following, wherein the values ​​of x and y are in the range of 1-6; the thickness of the first substrate layer is 2nm-30nm, the thickness of the first barrier layer is 1nm-8nm, the thickness of the diamond-like carbon film layer is 3nm-40nm, the thickness of the second barrier layer is 1nm-20nm, the thickness of the second substrate layer is 2nm-30nm, the thickness of the anti-fingerprint layer is less than or equal to 20nm, and the thickness of the composite film layer is less than 100nm; The glass panel has a Mohs hardness greater than or equal to 7, and the color difference value ΔE between the glass panel and the glass panel substrate is less than 1.

5.

2. The glass panel as described in claim 1, characterized in that, The composite film layer further includes a first optical film layer disposed between the first substrate and the first barrier layer, and / or a second optical film layer disposed between the second substrate and the second barrier layer; the first optical film layer and the second optical film layer are used to adjust the transmittance of the glass panel.

3. The glass panel as described in claim 2, characterized in that, The thickness of the first optical film is 5nm-30nm; the thickness of the second optical film is 5nm-20nm.

4. The glass panel as described in claim 2, characterized in that, The first optical film layer and the second optical film layer are stacked structures formed by two or more sublayers, and the material of each sublayer is selected from oxides, nitrides, or SiAl of silicon, aluminum, niobium, titanium, or zirconium. x O y N z Any one or more of the following, where x, y, and z take values ​​in the range of 1-6.

5. The glass panel as described in claim 4, characterized in that, The first optical film layer includes at least one first sublayer and at least one second sublayer alternately stacked, the first sublayer and the second sublayer having different refractive indices.

6. The glass panel as described in claim 5, characterized in that, The first sub-layer has 1-12 layers, and the second sub-layer has 1-12 layers.

7. The glass panel as described in claim 4, characterized in that, The second optical film layer includes at least one third sublayer and at least one fourth sublayer stacked alternately, wherein the third sublayer and the fourth sublayer have different refractive indices.

8. The glass panel as described in claim 7, characterized in that, The third sub-layer has 1-12 layers, and the fourth sub-layer has 1-12 layers.

9. The glass panel as described in any one of claims 1-8, characterized in that, The silicon oxide includes one or more of SiO2 and SiO; the aluminum oxide includes Al2O3.

10. The glass panel as described in any one of claims 4-8, characterized in that, The niobium oxide includes one or more of NbO, NbO2, Nb2O3, and Nb2O5; the titanium oxide includes TiO2; the zirconium oxide includes ZrO2; the silicon nitride includes Si3N4; the aluminum nitride includes AlN; the niobium nitride includes one or two of NbN and Nb2N; the titanium nitride includes TiN, TiN2, Ti2N, Ti3N, Ti4N, Ti3N4, Ti3N5, and Ti5N6; and the zirconium nitride includes ZrN.

11. The glass panel as described in any one of claims 1-8, characterized in that, The diamond-like carbon film layer includes a diamond-like carbon film doped with any one or more doping elements selected from silicon, aluminum, titanium, zirconium, molybdenum, nitrogen, and hydrogen.

12. The glass panel as described in any one of claims 1-8, characterized in that, The atomic percentage of non-carbon elements in the diamond-like film layer is less than 40%.

13. The glass panel as described in any one of claims 1-8, characterized in that, In the diamond-like carbon film layer, sp3 hybrid bonds account for more than 30% of the total number of sp2 and sp3 hybrid bonds.

14. The glass panel as described in any one of claims 1-8, characterized in that, The composite film layer on the glass panel substrate can withstand more than 10,000 rubber rubs without falling off.

15. The glass panel as described in any one of claims 1-8, characterized in that, The glass panel has an average transmittance of 85% or greater in the wavelength range of 450nm-940nm.

16. The glass panel as described in any one of claims 1-8, characterized in that, The reduction in 550nm transmittance of the glass panel relative to the glass panel substrate is less than 0.5%, or the 550nm transmittance of the glass panel is greater than or equal to the 550nm transmittance of the glass panel substrate.

17. A method for preparing a glass panel, characterized in that, include: A composite film layer is deposited on the surface of a glass panel substrate. The composite film layer includes a first underlayer, a first barrier layer, a diamond-like carbon film layer, a second barrier layer, a second underlayer, and an anti-fingerprint layer, which are stacked sequentially. The first substrate, first barrier layer, diamond-like carbon film layer, second barrier layer, and second substrate are prepared by magnetron sputtering, and the anti-fingerprint layer is prepared by vapor deposition. The materials of the first substrate and the second substrate are independently selected from one or more of silicon oxide and aluminum oxide, and the material of the first barrier layer is selected from CN. x SiC x SiN x C y One or more of the following, wherein the material of the second barrier layer is selected from SiN x CN x SiC x SiN x C y One or more of the following, wherein the values ​​of x and y are in the range of 1-6; the thickness of the first substrate layer is 2nm-30nm, the thickness of the first barrier layer is 1nm-8nm, the thickness of the diamond-like carbon film layer is 3nm-40nm, the thickness of the second barrier layer is 1nm-20nm, the thickness of the second substrate layer is 2nm-30nm, the thickness of the anti-fingerprint layer is less than or equal to 20nm, and the thickness of the composite film layer is less than 100nm.

18. The preparation method according to claim 17, characterized in that, The composite membrane layer further includes: A first optical film layer disposed between the first substrate and the first barrier layer, and / or a second optical film layer disposed between the second substrate and the second barrier layer; the first optical film layer and the second optical film layer are prepared by magnetron sputtering.

19. A display screen, characterized in that, It includes a display module and a glass panel covering the display module, the glass panel including the glass panel according to any one of claims 1-16.

20. A terminal, characterized in that, The device includes a housing and a circuit board located inside the housing. The housing includes a display screen, which includes a glass panel and a display module disposed inside the glass panel. The glass panel includes the glass panel according to any one of claims 1-16.

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