Glass display panel protective film, preparation method therefor, and product comprising glass display panel protective film

Abstract

Embodiments of the present invention provide a glass display panel protective film, a preparation method therefor, and a product comprising the glass display panel protective film. The glass display panel protective film comprises an anti-reflection layer, a DLC layer, a doped transition layer, and an anti-fingerprint layer which are sequentially stacked; the anti-reflection layer is in contact with a glass display panel; the DLC layer is formed by a first hydrocarbon gas by means of a PECVD process; and the doped transition layer is formed by a doped element gas source or the doped element gas source and a second hydrocarbon gas by means of a PECVD process. The embodiments of the present application can provide a glass display panel protective film with improved surface hardness, scratch resistance and wear resistance, and good anti-reflectivity and contamination resistance, and the like.

Description

Glass display panel protective film, preparation method thereof and products containing same

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 28, 2023, with application number CN202311846135.5 and invention name “Glass display panel protective film, preparation method thereof and products comprising the same”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the field of coating, and in particular to a protective film for a glass display panel, a preparation method thereof, and products comprising the same. Background Art

[0003] With the rapid development of the computer, communication, and consumer electronics (3C) industries, as well as virtual reality (VR), in recent years, glass display panels, which serve as the outer protective layer of these electronic products, have become a key focus for researchers and developers. High-quality glass display panels or protective cover plates have become a crucial component of the competitiveness of these products. This requires not only high resolution, brightness, and fingerprint resistance, but also higher requirements for surface hardness, scratch resistance, and wear resistance.

[0004] The protective films on glass display panels of mainstream electronic products currently on the market primarily combine anti-reflection (AR) and anti-fingerprint films to achieve anti-reflection, anti-reflection, anti-fouling, and wear-resistance. AR films are primarily achieved through an optical thin film design, alternating layers of high-reflectivity and low-reflectivity materials. However, these films are often made of soft oxynitrides, making them susceptible to scratches from hard particles during use, affecting the screen's feel and appearance.

[0005] Diamond-like carbon (DLC) film, a film with excellent properties such as high hardness and low friction coefficient, can provide effective protection for glass products. At a certain thickness, it does not affect the optical properties of the original glass and has good adhesion to the glass. However, the chemical inertness of DLC film makes it difficult to combine with anti-fingerprint film, resulting in poor wear resistance of the resulting composite protective film, which fails to achieve the expected protective film effect.

[0006] Patent application No. CN1106929800 A provides a DLC composite film and a preparation method thereof. The composite film includes a SiOxNy film layer and a hydrogen-containing DLC ​​film layer, which can achieve good optical properties, hardness and wear resistance. However, in the field of glass cover plates, the outermost layer of the commonly used protective film also requires an anti-fingerprint film to provide good smoothness and anti-fouling properties in order to have better market applications.

[0007] Patent application No. CN115113305 A provides an anti-reflection film, its preparation method and application. In the process, a TixSiyN layer is prepared and applied between the anti-reflection layer and the anti-fingerprint layer, so that the protective film has better light absorption rate and surface resistance, which can be better applied to touch screens. However, the oxide of this protective film as the anti-reflection layer has the disadvantages of low surface hardness and poor scratch resistance.

[0008] Summary of the Invention

[0009] The present invention provides a protective film for a glass display panel having improved surface hardness, scratch resistance and wear resistance and good anti-reflection and anti-fouling properties, a preparation method thereof and a product comprising the same.

[0010] One aspect of an embodiment of the present invention relates to a glass display panel protective film, which includes an anti-reflection layer, a DLC layer, a doped transition layer and an anti-fingerprint layer stacked on top of each other in sequence. The anti-reflection layer is in contact with the glass display panel. The DLC layer is formed by a first hydrocarbon gas through a PECVD (Plasma Enhanced Chemical Vapor Deposition) process. The doped transition layer is formed by a doping element gas source or by a doping element gas source and a second hydrocarbon gas through a PECVD process.

[0011] In some embodiments, the first hydrocarbon gas and the second hydrocarbon gas each independently include one or more of methane, ethane, propane, ethylene, acetylene, propylene, propyne, benzene vapor, and toluene vapor.

[0012] In some embodiments, the doping element includes at least one of silicon and nitrogen.

[0013] In some embodiments, the doping element gas source includes at least one of silane, alkyl-substituted silane, siloxane, nitrogen, and ammonia.

[0014] In some embodiments, the silane includes at least one of monosilane, disilane, and trisilane.

[0015] In some embodiments, the alkyl-substituted silane includes at least one of methylsilane, dimethylsilane, trimethylsilane, and tetramethylsilane.

[0016] In some embodiments, the siloxane includes hexamethylsilyl ether.

[0017] In some embodiments, the anti-fingerprint layer is formed by a vacuum evaporation process.

[0018] In some embodiments, the sum of the thicknesses of the DLC layer, the doped transition layer, and the anti-fingerprint layer is less than 50 nm.

[0019] Another aspect of an embodiment of the present invention relates to a method for preparing a protective film for a glass display panel, comprising:

[0020] Step S1. Preparing an anti-reflection layer on a glass display panel;

[0021] Step S2. Depositing a DLC layer on the surface of the anti-reflection layer using a first hydrocarbon gas by a PECVD process;

[0022] Step S3. depositing a doped transition layer on the surface of the DLC layer by a PECVD process from a doping element gas source or a doping element gas source and a second hydrocarbon gas; and

[0023] Step S4: preparing an anti-fingerprint layer on the surface of the doped transition layer, so that the anti-fingerprint layer and the doped transition layer overlap each other.

[0024] In some embodiments, step S2 and / or step S3 are performed under a vacuum degree of 1 Pa-5 Pa, a bias voltage of 100 V-800 V, and a plasma source power of 100 W-800 W.

[0025] In some embodiments, the method described in the present application includes step S5: cleaning the surface of the anti-reflection layer, and step S5 is performed before step S2.

[0026] In some embodiments, the method described in the present application includes step S6. Plasma etching is performed on the surface of the cleaned anti-reflection layer. Step S6 is performed before step S2.

[0027] In some embodiments, the method described in the present application includes step S7. Plasma bombardment activation is performed on the surface of the doped transition layer. Step S7 is performed before step S4.

[0028] In some embodiments, step S4 includes vacuum evaporating perfluoropolyether silicone on the surface of the plasma-activated doped transition layer to form an anti-fingerprint layer.

[0029] In some embodiments, the method described in this application includes step S8. After step S4, the glass display panel is left to stand at room temperature for more than 120 minutes.

[0030] In some embodiments, the first hydrocarbon gas and the second hydrocarbon gas each independently include one or more of methane, ethane, propane, ethylene, acetylene, propylene, propyne, benzene vapor, and toluene vapor.

[0031] In some embodiments, the doping element includes at least one of silicon and nitrogen.

[0032] In some embodiments, the doping element gas source includes at least one of silane, alkyl-substituted silane, siloxane, nitrogen, and ammonia.

[0033] In some embodiments, the silane includes at least one of monosilane, disilane, and trisilane.

[0034] In some embodiments, the alkyl-substituted silane includes at least one of methylsilane, dimethylsilane, trimethylsilane, and tetramethylsilane.

[0035] In some embodiments, the siloxane includes hexamethylsilyl ether.

[0036] In some embodiments, the sum of the thicknesses of the DLC layer, the doped transition layer, and the anti-fingerprint layer is less than 50 nm.

[0037] Yet another aspect of the embodiments of the present invention relates to a product, which includes a glass display panel and a glass display panel protective film as described in the present application, which covers at least a portion of a surface of the glass display panel.

[0038] The technical solutions of the embodiments of the present application can be beneficial in providing a glass display panel protective film with improved surface hardness, scratch resistance and wear resistance, as well as good anti-reflection and anti-fouling properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] FIG1 is a schematic structural diagram of a glass display panel protective film and a product including the same according to an embodiment of the present invention.

[0040] Description of reference numerals:

[0041] 10: Glass display panel protective film;

[0042] 12: Glass display panel;

[0043] 14: anti-reflection layer;

[0044] 16: DLC layer;

[0045] 18: doped transition layer;

[0046] 20: Anti-fingerprint layer;

[0047] 100: Product. DETAILED DESCRIPTION

[0048] Figure 1 is a schematic structural diagram of a glass display panel protective film and a product including the same according to an embodiment of the present invention. As shown in Figure 1 , one aspect of the present invention relates to a glass display panel protective film 10, which sequentially comprises an anti-reflection layer 14, a DLC layer 16, a doped transition layer 18, and an anti-fingerprint layer 20, stacked one on top of the other. The anti-reflection layer 14 is in contact with the glass display panel 12. The DLC layer 16 is formed using a first hydrocarbon gas via a PECVD process. The doped transition layer 18 is formed using a doping element source gas or a doping element source gas and a second hydrocarbon gas via a PECVD process.

[0049] In the embodiments of the present invention, “overlap” means “stack, combine”, “overlay, combine”, “stack, synthesize into a whole”, “stack, put together” and the like.

[0050] The glass display panel protective film 10 can be any composite film formed by stacking the anti-reflection layer 14 , the DLC layer 16 , the doped transition layer 18 and the anti-fingerprint layer 20 , as long as it is suitable for the present invention.

[0051] The glass display panel 12 may be any display glass panel or glass cover serving as an outer layer of protection, as long as it is suitable for the present invention.

[0052] The anti-reflection layer 14 can be any film having anti-reflection or anti-reflection properties, as long as it is suitable for the present invention. For example, the anti-reflection layer 14 can be a multi-layer stacked structure composed of silicon oxide and / or niobium oxide.

[0053] The DLC layer 16 may be formed by a PECVD process using a first hydrocarbon gas, or may be formed by a PECVD process using a first hydrocarbon gas and a plasma source gas.

[0054] The doped transition layer 18 can be formed by a PECVD process using a doping element source gas or a doping element source gas and a second hydrocarbon gas. Alternatively, the doped transition layer 18 can be formed by a PECVD process using a doping element source gas and a plasma source gas or a doping element source gas, a second hydrocarbon gas, and a plasma source gas.

[0055] The plasma source gas may include, for example, an inert gas.

[0056] The first hydrocarbon gas and the second hydrocarbon gas may be the same as or different from each other.

[0057] The anti-fingerprint layer 20 can be any film with smoothness and anti-fouling properties, as long as it is suitable for use in the present invention. In some embodiments, the anti-fingerprint layer 20 is made of a fluorinated material. For example, the anti-fingerprint layer 20 can be made of perfluoropolyether silicone. In some embodiments, the fluorinated material can be UF503, UD509, or UD500 manufactured by Daikin Industries, Ltd., or KY-178, KY-185, KY-1900, X-71-195, or X-71-197 manufactured by Shin-Etsu Chemical Co., Ltd.

[0058] In the embodiment of the present application, the glass display panel protective film 10 includes a DLC layer 16 having excellent properties such as high hardness and low friction coefficient, which can help improve the surface hardness of the glass display panel protective film 10.

[0059] Furthermore, a DLC layer 16 and a doped transition layer 18 are sequentially formed on the anti-reflection layer 14 in contact with the glass display panel 12 via a PECVD process, allowing the anti-reflection layer 14, the DLC layer 16, and the doped transition layer 18 to overlap with one another. The doped transition layer 18 is then overlapped with the anti-fingerprint layer 20, allowing the DLC layer 16 and the anti-fingerprint layer 20 to be well bonded together via the doped transition layer 18. In this manner, the overlapping of the anti-reflection layer 14, the DLC layer 16, the doped transition layer 18, and the anti-fingerprint layer 20 can improve the scratch resistance and wear resistance of the glass display panel protective film 10.

[0060] In addition, the anti-reflection layer 14 in the glass display panel protective film 10 can give it good anti-reflection performance, and the anti-fingerprint film 20 can give it good anti-fouling performance.

[0061] Therefore, the technical solution of the embodiment of the present invention can be beneficial for providing a glass display panel protective film with improved surface hardness, scratch resistance and wear resistance as well as good anti-reflection and anti-fouling properties.

[0062] In some embodiments, the first hydrocarbon gas and the second hydrocarbon gas each independently include one or more of methane, ethane, propane, ethylene, acetylene, propylene, propyne, benzene vapor, and toluene vapor.

[0063] Benzene and toluene that are not in a gaseous state under normal pressure can be heated and evaporated or decompressed to form benzene vapor and toluene vapor respectively.

[0064] In some embodiments, the doping element includes at least one of silicon and nitrogen.

[0065] The doped transition layer 18 can form bonds with the perfluoropolyether silicone in the anti-fingerprint layer 20 through the doped silicon and / or nitrogen therein, for example, forming chemical bonds such as Si-O, Si-O-Si, and N-Si, thereby effectively bonding with the anti-fingerprint layer 20. Furthermore, the DLC layer 16 superimposed on the doped transition layer 18 can also effectively bond with the anti-fingerprint layer 20. This can help improve the scratch resistance and wear resistance of the glass display panel protective film 10.

[0066] The doping element may also include any element other than silicon and nitrogen as long as it is suitable for the present invention.

[0067] In some embodiments, the doping element gas source includes at least one of silane, alkyl-substituted silane, siloxane, nitrogen, and ammonia.

[0068] In the embodiments of the present application, unless otherwise specified, the doping element gas source refers to a gas source that can provide and / or contain the doping elements described in the present application.

[0069] If silicon is selected as the doping element, at least one of silane, alkyl-substituted silane, and siloxane can be selected as the doping element source gas. If nitrogen is selected as the doping element, at least one of nitrogen and ammonia can be selected as the doping element source gas. If silicon and nitrogen are selected as the doping elements, at least one each of silane, alkyl-substituted silane, and siloxane can be selected along with nitrogen and ammonia, and these can be used together as the doping element source gas.

[0070] In some embodiments, the silane includes at least one of monosilane, disilane, and trisilane.

[0071] Trisilane that is not in a gaseous state at normal pressure can be heated and evaporated or reduced in pressure to form trisilane vapor.

[0072] In some embodiments, the alkyl-substituted silane includes at least one of methylsilane, dimethylsilane, trimethylsilane, and tetramethylsilane.

[0073] In some embodiments, the siloxane includes hexamethylsilyl ether.

[0074] The doping element gas source in the embodiment of the present application is not limited thereto, and may also include any other applicable doping element gas source.

[0075] In some embodiments, the anti-fingerprint layer 20 is formed by a vacuum evaporation process.

[0076] The anti-fingerprint layer 20 may be formed by any known vacuum evaporation process, or by other known methods, such as magnetron sputtering, spraying, etc., as long as they are suitable for the present invention.

[0077] In some embodiments, the total thickness of the DLC layer 16 , the doped transition layer 18 , and the anti-fingerprint layer 20 is less than 50 nm.

[0078] In the embodiments of the present application, unless otherwise specified, the numerical range may include any sub-range therein, for example, less than 50 nm may include 40 nm, 30 nm, 20 nm, 10 nm, and so on.

[0079] In some embodiments, the total thickness of the DLC layer 16 , the doped transition layer 18 , and the anti-fingerprint layer 20 is greater than 30 nm.

[0080] Another aspect of the present invention relates to a method for preparing a glass display panel protective film 10, comprising:

[0081] Step S1. Preparing an anti-reflection layer 14 on the glass display panel 12;

[0082] Step S2: depositing a DLC layer 16 on the surface of the anti-reflection layer 14 by a PECVD process using a first hydrocarbon gas;

[0083] Step S3. Depositing a doped transition layer 18 on the surface of the DLC layer 16 by a PECVD process from a doping element gas source or a doping element gas source and a second hydrocarbon gas; and

[0084] Step S4: preparing an anti-fingerprint layer 20 on the surface of the doped transition layer 18 so that the anti-fingerprint layer 20 and the doped transition layer 18 overlap each other.

[0085] In the embodiment of the present application, an anti-reflection layer 14 may be prepared on the glass display panel 12 in step S1 to impart good anti-reflection performance to the glass display panel protective film 10 .

[0086] Then, through steps S2 and S3, a DLC layer 16 and a doped transition layer 18 are sequentially formed on the anti-reflection layer 14, so that the anti-reflection layer 14, the DLC layer 16, and the doped transition layer 18 are superimposed on each other. Then, through step S4, an anti-fingerprint layer 20 is formed on the surface of the doped transition layer 18 and superimposed thereon, so that the DLC layer 16 and the anti-fingerprint layer 20 are well combined through the doped transition layer 18.

[0087] In this way, the anti-reflection layer 14, the DLC layer 16, the doped transition layer 18 and the anti-fingerprint layer 20 are overlapped with each other, which can help improve the scratch resistance and wear resistance of the glass display panel protective film 10. At the same time, the glass display panel protective film 10 can also have good anti-reflection and anti-fouling properties.

[0088] Steps S1 and S4 can be performed in any known manner as long as they are applicable to the present invention.

[0089] In some embodiments, step S2 and / or step S3 are performed under a vacuum degree of 1 Pa-5 Pa, a bias voltage of 100 V-800 V, and a plasma source power of 100 W-800 W.

[0090] Step S2 and / or step S3 may be performed using an ICP (Inductively Coupled Plasma) source.

[0091] In some embodiments, the method described in the present application includes step S5: cleaning the surface of the anti-reflection layer 14. Step S5 is performed before step S2.

[0092] Specifically, step S5 can be performed as follows: the glass display panel 12 with the anti-reflection layer 14 is placed in anhydrous ethanol and deionized water for ultrasonic cleaning for 10 minutes, and then taken out and wiped with a dust-free cloth after the ultrasonic cleaning, and then placed in a drying cabinet at about 25°C for more than 12 hours.

[0093] In some embodiments, the method described in the present application includes step S6. Plasma etching is performed on the surface of the cleaned anti-reflection layer 14. Step S6 is performed before step S2.

[0094] In this way, the surface activity of the anti-reflection layer 14 can be increased, and the bonding force between the anti-reflection layer 14 and the DLC layer 16 can be improved.

[0095] Specifically, step S6 can be performed as follows: the glass display panel 12 after step S5 is loaded on the sample turntable in the vacuum chamber, and the bottom pressure of the chamber is pumped to below 6.0×10-3Pa, 50sccm-200sccm of etching gas is introduced, and the vacuum degree is controlled at 1Pa-5Pa, and then a 100V-800V bias is loaded on the turntable, the plasma source power is set to 100W-800W, and plasma etching is performed for 3min-20min.

[0096] Here, the etching gas may include but is not limited to argon, helium, oxygen, neon, and nitrogen.

[0097] In some embodiments, the method described in the present application includes step S7. Plasma bombardment activation is performed on the surface of the doped transition layer 18. Step S7 is performed before step S4.

[0098] In this way, the surface activity of the doped transition layer 18 can be increased, and the bonding force between the doped transition layer 18 and the anti-fingerprint layer 20 can be improved.

[0099] Specifically, step S7 can be performed as follows: the glass display panel 12 formed with the doped transition layer 18 is placed in a vacuum evaporation coating device for the anti-fingerprint layer 20, the bottom pressure of the cavity is evacuated to below 1 Pa, 500 sccm-1200 sccm of argon gas is introduced, the vacuum degree is controlled at 1 Pa-5 Pa, a bias voltage of 500 V-800 V is applied to the metal mesh electrode facing the sample holder, and plasma bombardment activation is performed for 60 s-500 s.

[0100] In some embodiments, step S4 includes vacuum evaporating perfluoropolyether organic silicon on the surface of the doped transition layer 18 after plasma bombardment activation to form the anti-fingerprint layer 20 .

[0101] Specifically, the chamber of the vacuum evaporation coating equipment can be evacuated to a bottom pressure of 7x10 -3 Pa, load 400A-600A current on the anti-fingerprint pill evaporating dish for 400s-600s heating and evaporation.

[0102] In some embodiments, the method described in this application includes step S8. After step S4, the glass display panel 12 is left to stand at room temperature for more than 120 minutes.

[0103] In this way, the anti-fingerprint layer 20 can be fully aged.

[0104] In some embodiments, the first hydrocarbon gas and the second hydrocarbon gas each independently include one or more of methane, ethane, propane, ethylene, acetylene, propylene, propyne, benzene vapor, and toluene vapor.

[0105] In some embodiments, the doping element includes at least one of silicon and nitrogen.

[0106] The doped transition layer 18 can form bonds with the perfluoropolyether silicone in the anti-fingerprint layer 20 through the doped silicon and / or nitrogen therein, for example, forming chemical bonds such as Si-O, Si-O-Si, and N-Si, thereby effectively bonding with the anti-fingerprint layer 20. Furthermore, the DLC layer 16 superimposed on the doped transition layer 18 can also effectively bond with the anti-fingerprint layer 20. This can help improve the scratch resistance and wear resistance of the glass display panel protective film 10.

[0107] The doping element may also include any element other than silicon and nitrogen as long as it is suitable for the present invention.

[0108] In some embodiments, the doping element gas source includes at least one of silane, alkyl-substituted silane, siloxane, nitrogen, and ammonia.

[0109] If silicon is selected as the doping element, at least one of silane, alkyl-substituted silane, and siloxane can be selected as the doping element source gas. If nitrogen is selected as the doping element, at least one of nitrogen and ammonia can be selected as the doping element source gas. If silicon and nitrogen are selected as the doping elements, at least one each of silane, alkyl-substituted silane, and siloxane can be selected along with nitrogen and ammonia, and these can be used together as the doping element source gas.

[0110] In some embodiments, the silane includes at least one of monosilane, disilane, and trisilane.

[0111] Trisilane that is not in a gaseous state at normal pressure can be heated and evaporated or reduced in pressure to form trisilane vapor.

[0112] In some embodiments, the alkyl-substituted silane includes at least one of methylsilane, dimethylsilane, trimethylsilane, and tetramethylsilane.

[0113] In some embodiments, the siloxane includes hexamethylsilyl ether.

[0114] The doping element gas source in the embodiment of the present application is not limited thereto, and may also include any other applicable doping element gas source.

[0115] In some embodiments, the total thickness of the DLC layer 16 , the doped transition layer 18 , and the anti-fingerprint layer 20 is less than 50 nm.

[0116] The total thickness of the DLC layer 16 , the doping transition layer 18 , and the anti-fingerprint layer 20 may be greater than 30 nm.

[0117] The Mohs hardness of the DLC layer 16 , the doped transition layer 18 and the anti-fingerprint layer 20 can reach 7. After being rubbed with steel wool 15,000 times, the water contact angle is greater than 100° and the oil contact angle is about 68°.

[0118] Yet another aspect of the embodiments of the present invention relates to a product 100 , which includes a glass display panel 12 and a protective film 10 for the glass display panel 12 as described in the present application, covering at least a portion of a surface of the glass display panel 12 .

[0119] The product 100 may include various 3C products, virtual reality products, etc.

[0120] The technical solution of the embodiment of the present application can be beneficial for providing a product 100 with a glass display panel protective film 10 having improved surface hardness, scratch resistance and wear resistance as well as good anti-reflection and anti-fouling properties as the outer layer protection, which can be beneficial for improving the surface hardness, scratch resistance and wear resistance of the glass display panel 12 of the product 100.

[0121] The following examples illustrate the embodiments of the present invention, which are only used to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0122] Example 1

[0123] 1) Cleaning: The glass display panel 12 with the anti-reflection layer 14 was ultrasonically cleaned in anhydrous ethanol and deionized water for 10 minutes. After the ultrasonic cleaning, the panel was taken out and wiped with a dust-free cloth, and then placed in a drying cabinet at 25° C. for 13 hours.

[0124] 2) Preparation of the DLC layer 16 and doped transition layer 18: The glass display panel 12 cleaned in step 1) was placed on a sample turntable within a vacuum chamber. The chamber bottom pressure was reduced to 6.0×10-3 Pa. 100 sccm of argon was introduced as an etching gas, and the vacuum was controlled at 4 Pa. A 600V bias was applied to the turntable, and the plasma source power was set to 600W. Plasma etching was performed for 3 minutes. The chamber vacuum was then evacuated to the base vacuum, and 50 sccm of acetylene and argon were introduced, controlling the vacuum at 4 Pa. A 600V bias was applied to the turntable, and the plasma source power was set to 600W for 5 minutes to prepare the DLC layer 16. After the DLC layer 16 is prepared, the cavity is evacuated to the background vacuum, and then 50 sccm of tetramethylsilane and 50 sccm of argon are introduced to control the vacuum degree at 4 Pa. Then, a 600V bias is loaded on the turntable, and the plasma source power is set to 200W for 3 minutes to prepare the doped transition layer 18.

[0125] 3) Preparation of anti-fingerprint layer 20: After step 2), the glass display panel 12 is taken out and placed in the anti-fingerprint vacuum evaporation coating equipment. The bottom pressure of the cavity is pumped to 1Pa, 800sccm of argon is introduced, the vacuum degree is controlled at 3Pa, a 600V bias is applied to the metal mesh, and plasma bombardment activation is performed for 200s. Subsequently, the cavity of the vacuum evaporation coating equipment is pumped to the bottom pressure, and a 500A current is applied to the anti-fingerprint pill evaporating dish loaded with UD509 manufactured by Daikin Industries, Ltd. for 500s of heating and evaporation. After the evaporation is completed, the glass display panel 12 with the glass display panel protective film 10 on the surface is taken out and allowed to stand at room temperature for 240min.

[0126] Example 2

[0127] A glass display panel protective film 10 was prepared in the same manner as in Example 1, except that methane was used instead of acetylene in step 2).

[0128] Example 3

[0129] A glass display panel protective film 10 was prepared in the same manner as in Example 1, except that propane was used instead of acetylene in step 2).

[0130] Example 4

[0131] A glass display panel protective film 10 was prepared in the same manner as in Example 1, except that trimethylsilane was used instead of tetramethylsilane in step 2).

[0132] Example 5

[0133] A glass display panel protective film 10 was prepared in the same manner as in Example 1, except that monosilane and acetylene were used instead of tetramethylsilane in step 2).

[0134] Example 6

[0135] A glass display panel protective film 10 was prepared in the same manner as in Example 1, except that nitrogen and acetylene were used instead of tetramethylsilane in step 2).

[0136] Comparative Example 1

[0137] The glass display panel protective film 10 is prepared in the same manner as in Example 1, except that the preparation of the doped transition layer 18 in step 2) is omitted.

[0138] Comparative Example 2

[0139] The glass display panel protective film 10 is prepared in the same manner as in Example 1, except that the preparation of the DLC layer 16 and the doping transition layer 18 in step 2) is omitted.

[0140] Comparative Example 3

[0141] A glass display panel protective film 10 was prepared in the same manner as in Example 1, except that step 3) was omitted.

[0142] Comparative Example 4

[0143] The glass display panel protective film 10 was prepared in the same manner as in Example 1, except that the preparation of the DLC layer 16 in step 2) was omitted.

[0144] Comparative Example 5

[0145] A glass display panel protective film 10 was prepared in the same manner as in Example 1, except that step 2) and step 3) were omitted.

[0146] Test Example 1. Testing the anti-fouling properties of the glass display panel protective film 10

[0147] The water drop angle and oil drop angle of the glass display panel protective films 10 prepared in Examples 1-6 and Comparative Examples 1-5 were measured using an SDC-100 water drop angle tester manufactured by Jiangsu Feiwotai Nanotechnology Co., Ltd. The oil drop angle was measured using n-hexadecane. The test results are summarized in Table 1 below.

[0148] Table 1. Test results of glass display panel protective film 10

[0149] Referring to Table 1, a comparison of the water drop angle and oil drop angle of the glass display panel protective films in Examples 1-6 with those in Comparative Examples 3 and 5 shows that the glass display panel protective film 10 of the present application includes the outermost anti-fingerprint layer 20, resulting in significantly improved water drop angle and oil drop angle, that is, good anti-fouling properties. The glass display panel protective films in Comparative Examples 3 and 5, which do not include an anti-fingerprint layer, have lower water drop angle and oil drop angle, that is, poor anti-fouling properties and unpleasant tactile feel.

[0150] Test Example 2: Testing the Mohs hardness of the glass display panel protective film 10

[0151] The Mohs hardness test of the glass display panel protective films in Examples 1-6 and Comparative Examples 1-5 was performed using an LX5608 electric pencil hardness tester from Astrid Instruments.

[0152] Specifically, a Mohs scale pen of varying hardness was placed on an electric hardness tester. A load of 500g was applied to the pen tip. The pen was then slid forward 2cm, scratching three times at different locations. The hardness of the protective film on the glass display panel was determined based on the presence or absence of scratches. The test results are summarized in Table 1 above.

[0153] Referring to Table 1, by comparing the Mohs hardness of the glass display panel protective film in Examples 1-6 with that in Comparative Examples 2, 4 and 5, it can be seen that the glass display panel protective film 10 of the present application includes the DLC layer 16, and thus has significantly improved Mohs hardness, that is, significantly improved surface hardness and scratch resistance.

[0154] Test Example 3. Testing the reflectivity of the glass display panel protective film 10

[0155] The reflectivity of the protective films on the glass display panels of Examples 1 to 6 and Comparative Examples 1 to 5 was measured using a SPECTROPHOTOMETER CM-5 spectrophotometer. The test results are summarized in Table 1 above.

[0156] Comparing the reflectivity of the glass display panel protective film in Examples 1-6 with that in Comparative Example 5, it can be seen that the anti-reflective property of the glass display panel protective film 10 of the present application does not change significantly.

[0157] Test Example 4: Testing the Wear Resistance of the Glass Display Panel Protective Film 10

[0158] Steel wool abrasion resistance testing was performed on the glass display panel protective films used in Examples 1-6 and Comparative Examples 1-5 using a ZJ-339-GSR steel wool abrasion tester from Zhijia Instruments. The test conditions were: Bonstar OOOO# steel wool, 500g load, 1-inch stroke, 60 cycles / min frequency, and a 10 x 10 mm grinding head. The water droplet angle was measured after 15,000 abrasion cycles. The test results are summarized in Table 1.

[0159] By comparing the changes in the water drop angle before and after friction of the glass display panel protective film in Examples 1-6 with those in Comparative Examples 1 and 4, it can be seen that the doped transition layer 18 in the glass display panel protective film 10 of the present application significantly improves the bonding between the DLC layer 16 and the anti-fingerprint layer 20, thereby significantly improving the wear resistance of the glass display panel protective film 10.

[0160] It can be seen from the test results in Table 1 above that the glass display panel protective film 10 of the present application has improved surface hardness, scratch resistance and wear resistance as well as good anti-reflection and anti-fouling properties.

[0161] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope defined by the claims.

Claims

1. A protective film for a glass display panel, characterized in that, The invention comprises an anti-reflection layer, a DLC layer, a doped transition layer and an anti-fingerprint layer which are stacked on each other in sequence, wherein the anti-reflection layer is in contact with the glass display panel, the DLC layer is formed by a first hydrocarbon gas through a PECVD process, and the doped transition layer is formed by a doped element gas source or by a doped element gas source and a second hydrocarbon gas through a PECVD process.

2. The protective film for a glass display panel according to claim 1, wherein The first hydrocarbon gas and the second hydrocarbon gas each independently include one or more of methane, ethane, propane, ethylene, acetylene, propylene, propyne, benzene vapor, and toluene vapor.

3. The protective film for a glass display panel according to claim 1, wherein The doping element includes at least one of silicon and nitrogen.

4. The protective film for a glass display panel according to claim 3, wherein, The doping element gas source includes at least one of silane, alkyl-substituted silane, siloxane, nitrogen and ammonia.

5. The protective film for a glass display panel according to claim 4, wherein, The silane includes at least one of monosilane, disilane and trisilane.

6. The protective film for a glass display panel according to claim 4, wherein, The alkyl-substituted silane includes at least one of methylsilane, dimethylsilane, trimethylsilane and tetramethylsilane.

7. The protective film for a glass display panel according to claim 4, wherein, The siloxane includes hexamethylsilyl ether.

8. The protective film for a glass display panel according to claim 1, wherein The anti-fingerprint layer is formed by a vacuum evaporation process.

9. The protective film for a glass display panel according to any one of claims 1-8, characterized in that, The sum of the thicknesses of the DLC layer, the doped transition layer and the anti-fingerprint layer is less than 50 nm.

10. A method for preparing a protective film for a glass display panel, characterized in that, include: Step S1. Preparing an anti-reflection layer on a glass display panel; Step S2. Depositing a DLC layer on the surface of the anti-reflection layer by a first hydrocarbon gas through a PECVD process; Step S3. Depositing a doped transition layer on the surface of the DLC layer by a PECVD process using a doping element gas source or the doping element gas source and a second hydrocarbon gas; as well as Step S4. preparing an anti-fingerprint layer on the surface of the doped transition layer, so that the anti-fingerprint layer and the doped transition layer overlap each other.

11. The preparation method according to claim 10, characterized in that, The step S2 and / or the step S3 are performed under a vacuum degree of 1 Pa-5 Pa, a bias voltage of 100 V-800 V, and a plasma source power of 100 W-800 W.

12. The preparation method according to claim 10, characterized in that, The method comprises step S5 of cleaning the surface of the anti-reflection layer, wherein step S5 is performed before step S2.

13. The preparation method according to claim 12, characterized in that, The method comprises step S6. performing plasma etching on the surface of the cleaned anti-reflection layer, wherein step S6 is performed before step S2.

14. The preparation method according to claim 10, characterized in that, The method comprises step S7: performing plasma bombardment activation on the surface of the doped transition layer, and step S7 is performed before step S4.

15. The preparation method according to claim 14, characterized in that, The step S4 includes vacuum evaporating perfluoropolyether organic silicon on the surface of the doped transition layer after plasma bombardment activation to form the anti-fingerprint layer.

16. The preparation method according to claim 15, characterized in that, The method comprises step S8. After step S4, the glass display panel is left to stand at room temperature for more than 120 minutes.

17. The preparation method according to claim 10, characterized in that, The first hydrocarbon gas and the second hydrocarbon gas each independently include one or more of methane, ethane, propane, ethylene, acetylene, propylene, propyne, benzene vapor, and toluene vapor.

18. The preparation method according to claim 10, characterized in that, The doping element includes at least one of silicon and nitrogen.

19. The preparation method according to claim 18, characterized in that, The doping element gas source includes at least one of silane, alkyl-substituted silane, siloxane, nitrogen and ammonia.

20. The preparation method according to claim 19, characterized in that, The silane includes at least one of monosilane, disilane and trisilane.

21. The preparation method according to claim 19, wherein, The alkyl-substituted silane includes at least one of methylsilane, dimethylsilane, trimethylsilane and tetramethylsilane.

22. The preparation method according to claim 19, wherein, The siloxane includes hexamethylsilyl ether.

23. The preparation method according to any one of claims 10-22, characterized in that, The sum of the thicknesses of the DLC layer, the doped transition layer, and the fingerprint-proof layer is less than 50 nm.

24. A product, characterized in that, A glass display panel protection film including a glass display panel and covering at least a part of the surface of the glass display panel, as described in any one of claims 1-9.

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