Display screen glass cover plate processing method

Abstract

The embodiment of the invention provides a processing method of a glass cover plate of a display screen. The processing method comprises the following steps: printing ultraviolet-resistant ink on the first side surface of a glass substrate close to the periphery by adopting a silk-screen printing process to form a bottom-layer ink blank body; the glass substrate is baked at the baking temperature, so that the bottom layer printing ink blank body is preliminarily cured and formed into a bottom layer printing ink layer; printing ultraviolet-resistant ink on the outer surface of the bottom ink layer by adopting a silk-screen printing process to form a surface ink blank; the glass substrate is subjected to high-temperature sintering at the sintering temperature higher than the softening temperature of the glass substrate for a preset period of time and then is quenched to normal temperature, so that the bottom ink layer and the surface ink blank are sintered into a whole to form an ultraviolet-resistant ink layer correspondingly embedded into the glass substrate; and forming an AG layer on the second side surface of the glass substrate on which the ultraviolet-resistant ink layer is formed by adopting an AG etching process. According to the embodiment, the bonding strength of the ink layer and the glass substrate can be effectively improved, and the thickness and weight of a finished product can be controlled.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of display glass cover plate processing, and in particular to a display glass cover plate processing method. Background Art

[0002] In order to obtain better visual display effects, the surface of the glass cover of the display screen is usually formed with an AG (Anti-Glare) layer. In addition, in order to improve the UV resistance and aging resistance of the display screen, a UV-blocking and aging-resistant ink layer is usually formed around the display area around the edge of the glass substrate. High-temperature curing treatment is required during the molding process of the ink layer.

[0003] An existing method for processing a glass cover plate for a display screen is to first print and form an ink layer on a predetermined area at the edge of a glass substrate, then form a layer of liquid medicine film on the surface of the glass substrate, and finally heat the liquid medicine film to solidify and form an AG layer. When the above method forms an ink layer on the surface of a glass substrate, a screen printing process is usually used to print and form an ink embryo at the inner surface edge of the glass substrate once, and then heat and solidify it. However, in order to meet the corresponding technical indicators of UV resistance and anti-aging, the ink layer is usually designed to be thicker, which can easily lead to poor internal curing performance of the ink layer during heating and curing, and poor bonding strength between the ink layer and the glass cover plate, which is easy to fall off, affecting the service life of the glass cover plate. In addition, this processing method is obviously only suitable for physically forming the AG layer, but since the physical method of forming the AG layer is to add a layer of film-forming material on the surface of the glass substrate, the thickness and weight of the final glass cover plate product will increase, which is not conducive to the thinness of the display screen product. Summary of the invention

[0004] The technical problem to be solved by the embodiments of the present invention is to provide a method for processing a display glass cover plate, which can effectively improve the curing performance of the ink layer and the bonding strength between the ink layer and the glass substrate, and is conducive to controlling the thickness and weight of the finished product.

[0005] In order to solve the above technical problems, the embodiment of the present invention provides the following technical solutions: a method for processing a display glass cover, comprising the following steps: Printing ultraviolet-resistant ink on the first side surface of the glass substrate near the periphery by a screen printing process to form a bottom ink embryo; Baking the glass substrate at a baking temperature to preliminarily solidify the bottom ink embryo to form a bottom ink layer; Printing UV-resistant ink on the outer surface of the bottom ink layer by screen printing to form a surface ink embryo; sintering the glass substrate at a sintering temperature higher than the softening temperature of the glass substrate for a predetermined period of time and then rapidly cooling it to room temperature, so that the bottom ink layer and the surface ink embryo are sintered into one body to form a UV-resistant ink layer corresponding to the embedded glass substrate; and An AG etching process is used to form an AG layer on the second side surface of the glass substrate on which the UV-resistant ink layer is formed.

[0006] Furthermore, the mesh number T of the silk screen when printing the bottom layer ink embryo is greater than the mesh number T of the silk screen when printing the surface layer ink embryo.

[0007] Furthermore, the baking temperature is 145-155° C., and the corresponding baking time is 8-12 minutes.

[0008] Furthermore, the sintering temperature is 680-720° C., and the corresponding high-temperature sintering predetermined time is 4-6 minutes.

[0009] Furthermore, the rapid cooling is to place the semi-finished product after high-temperature sintering in a coolant for cooling so that the temperature of the semi-finished product drops to room temperature within 150 seconds.

[0010] Furthermore, the step of using the AG etching process to form an AG layer on the second side surface of the glass substrate having the UV-resistant ink layer formed thereon specifically includes: Laying a protective film on the outer surface of the UV-resistant ink layer and on the area of ​​the glass substrate where the AG layer does not need to be formed; Etching the area on the glass substrate where the protective film is not applied with an etching solution to obtain a microscopic pit morphology; Polishing the entire outer surface of the etched glass substrate to form the AG layer; and The protective film is removed.

[0011] Furthermore, the etching solution is an acidic etching solution, the etching time is 50-100s, the polishing time is 5-10min, the haze of the AG layer is 8%±3, the glossiness is 65±10GU, and the roughness is 0.12±0.03um.

[0012] Furthermore, before forming the AG layer, the peripheral area of ​​the second side surface of the glass substrate is first formed into a 2.5D arc shape by machining.

[0013] Furthermore, after a 2.5D curved surface is formed on the first side surface of the glass substrate, a bottom ink embryo is screen-printed on the second side surface of the glass substrate.

[0014] Furthermore, the method further comprises: The entire outer surface of the AG layer is coated with an AF and / or AR film layer.

[0015] After adopting the above technical scheme, the embodiment of the present invention has at least the following beneficial effects: the embodiment of the present invention forms a bottom ink body by screen printing on the first side surface of the glass substrate near the periphery and bakes the bottom ink body to initially solidify and form a bottom ink layer, and then screen prints ultraviolet ink on the outer surface of the bottom ink layer to form a surface ink body, and then performs high-temperature sintering at a sintering temperature higher than the softening temperature of the glass substrate to soften the glass substrate, and at the same time, the bottom ink layer and the surface ink body are sintered into one and correspondingly embedded in the softened glass substrate to form an ultraviolet-resistant ink layer, which is beneficial to ensuring that the thickness of the ultraviolet-resistant ink layer meets the standard and improves the internal curing performance of the ultraviolet-resistant ink layer, and can also enhance the bonding strength between the ultraviolet-resistant ink layer and the glass substrate; and the AG etching process is used to form the AG layer on the second side surface of the glass substrate, so that the thickness and weight of the finished glass cover plate will not increase, which is beneficial to the thinness of the display screen product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a flowchart of the steps of an optional embodiment of the method for processing a display screen glass cover.

[0017] Figure 2 This is a cross-sectional schematic diagram of a 2.5D arc-shaped second side surface of a glass substrate in an optional embodiment of the display glass cover processing method of the present invention.

[0018] Figure 3 This is a cross-sectional schematic diagram of forming a bottom ink embryo on the first side surface of a glass substrate in an optional embodiment of the display glass cover processing method of the present invention.

[0019] Figure 4 This is a cross-sectional schematic diagram of forming a surface ink embryo on the first side surface of a glass substrate in an optional embodiment of the display glass cover processing method of the present invention.

[0020] Figure 5 This is a schematic plan view of forming an ultraviolet resistant ink layer on the first side surface of a glass substrate in an optional embodiment of the method for processing a display glass cover of the present invention.

[0021] Figure 6 This is a cross-sectional schematic diagram of applying a protective film on the surface of a glass substrate in an optional embodiment of the display glass cover processing method of the present invention.

[0022] Figure 7 This is a cross-sectional schematic diagram of forming an AG layer on the second side surface of a glass substrate in an optional embodiment of the method for processing a display glass cover of the present invention.

[0023] Figure 8This is a cross-sectional schematic diagram of removing a protective film from a glass substrate in an optional embodiment of the method for processing a display glass cover of the present invention.

[0024] Fig. 9 This is a cross-sectional schematic diagram of an optional embodiment of the display glass cover processing method of the present invention, in which the entire outer surface of the AG layer is coated with an AF film layer. DETAILED DESCRIPTION

[0025] The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the present invention and are not intended to limit the present invention. In addition, the embodiments and features in the embodiments of the present application may be combined with each other without conflict.

[0026] like Figure 1-Figure 8 As shown, an optional embodiment of the present invention provides a method for processing a display glass cover, comprising the following steps: S1: Printing UV-resistant ink on the first side surface of the glass substrate 1 near the periphery by screen printing to form a bottom ink embryo 20, such as Figure 3 As shown; S2: baking the glass substrate 1 at a baking temperature to preliminarily solidify the bottom ink embryo 20 into a bottom ink layer 21; S3: Printing UV-resistant ink on the outer surface of the bottom ink layer 21 by screen printing to form a surface ink embryo 22, such as Figure 4 As shown; S4: sintering the glass substrate 1 at a sintering temperature higher than the softening temperature of the glass substrate 1 for a predetermined time and then rapidly cooling it to room temperature, so that the bottom ink layer 21 and the surface ink embryo 22 are sintered into one body to form a corresponding UV-resistant ink layer 2 embedded in the glass substrate 1. Figure 5 As shown; S5: Using an AG etching process to form an AG layer 4 on the second side surface of the glass substrate 1 on which the UV-resistant ink layer 2 is formed. Figure 6-Figure 8 shown.

[0027] In the embodiment of the present invention, a bottom ink body 20 is first formed by screen printing on the periphery of the first side surface of the glass substrate 1 and baked to initially solidify the bottom ink body 20 into a bottom ink layer 21, and then ultraviolet ink is screen printed on the outer surface of the bottom ink layer 21 to form a surface ink body 22, and then high-temperature sintering is performed at a sintering temperature higher than the softening temperature of the glass substrate 1 to soften the glass substrate 1, and at the same time, the bottom ink layer 21 and the surface ink body 22 are sintered into one body and correspondingly embedded in the softened glass substrate 1 to form an ultraviolet-resistant ink layer 2, which is beneficial to ensuring that the thickness of the ultraviolet-resistant ink layer 2 meets the standard and improves the internal curing performance of the ultraviolet-resistant ink layer 2, and can also enhance the bonding strength between the ultraviolet-resistant ink layer 2 and the glass substrate 1; and the AG etching process is used to form the AG layer on the second side surface of the glass substrate 1, so that the thickness and weight of the finished glass cover plate will not increase, which is beneficial to the thinness of the display screen product.

[0028] In an optional embodiment of the present invention, the screen mesh T number when printing the bottom ink body 20 is greater than the screen mesh T number when printing the surface ink body 22. In this embodiment, the bottom ink body 20 is printed with a screen with a larger screen mesh T number, and the ink material constituting the bottom ink body 20 is more delicate, and can be better combined with the glass substrate during baking, while the surface ink body 22 is printed with a screen with a relatively small screen mesh T number, which is conducive to improving printing efficiency and reducing ink loss. In practical applications, a screen with a screen mesh T number of 420 can be selected to print the bottom ink body 20, and a screen with a screen mesh T number of 350 can be selected to print the surface ink body 22.

[0029] In an optional embodiment of the present invention, the baking temperature is 145-155°C, and the corresponding baking time is 8-12 minutes. In this embodiment, the bottom ink body 20 is baked under the above baking conditions. On the one hand, the bottom ink body 20 can be effectively initially solidified, so as to facilitate printing on the outer surface to form the surface ink body 22. On the other hand, the baking temperature is not very high, and the bottom ink layer 21 will not be completely solidified, which is conducive to effectively combining with the subsequently printed surface ink body 22 to form a whole during high-temperature sintering.

[0030] In an optional embodiment of the present invention, the sintering temperature is 680-720°C, and the corresponding high-temperature sintering predetermined time is 4-6 minutes. In this embodiment, the above sintering temperature and sintering time are used to keep the glass substrate 1 softened under more economical process parameter conditions, while sintering the bottom ink layer 21 and the surface ink embryo 22 into a whole and embedding the whole into the softened glass substrate 1. Preferably, the sintering temperature can be controlled at about 690°C.

[0031] In an optional embodiment of the present invention, the rapid cooling is to place the semi-finished product after high-temperature sintering in a coolant for cooling so that the temperature of the semi-finished product drops to room temperature within 150 seconds. In this embodiment, by placing the semi-finished product in a coolant for cooling, the semi-finished product can be rapidly cooled in a short time by selecting a suitable coolant, so that the glass substrate 1 and the UV-resistant ink layer 2 are quickly hardened and connected as a whole and are not easy to separate.

[0032] In an optional embodiment of the present invention, the AG etching process specifically includes: A protective film 3 is applied on the outer surface of the UV-resistant ink layer 2 and the area of ​​the glass substrate 1 where the AG layer does not need to be formed. Figure 6 As shown; The area on the glass substrate 1 where the protective film 3 is not applied is etched with an etching solution to obtain a microscopic pit morphology, such as Figure 7 As shown; Polishing the entire outer surface of the etched glass substrate 1 to form the AG layer 4; and Remove the protective film 3, such as Figure 8 shown.

[0033] In this embodiment, etching is performed after the protective film layer 3 is used to protect the corresponding area, which can prevent the area that does not need to be etched from being corroded. Polishing after etching is also performed to make the surface of the AG layer 4 relatively neat without obvious spikes.

[0034] In an optional embodiment of the present invention, the etching liquid is an acidic etching liquid, the etching time is 50-100s, the polishing time is 5-10min, the haze of the AG layer 4 is 8%±3, the glossiness is 65±10GU, and the roughness is 0.12±0.03um. In this embodiment, the acidic etching liquid is used in combination with the above process conditions for etching and polishing, so that the AG layer 4 that meets the corresponding performance index requirements can be obtained more efficiently.

[0035] In a specific implementation, it can be understood that the protective film 3 is an acid-resistant film formed by curing epoxy resin, and the protective film 3 can be removed by soaking the polished glass substrate 1 in a sodium hydroxide solution at 50-55° C. for 8-12 minutes; the acidic etching solution includes, by mass fraction, 50% ammonium bifluoride, 4% ammonium fluorosilicate, 6% starch, 12-15% citric acid, 10-15% calcium fluoride and 10-15% water.

[0036] In an optional embodiment of the present invention, Figure 2As shown, before forming the AG layer 4, the peripheral area of ​​the second side surface of the glass substrate 1 is first machined into a 2.5D arc shape 5. In this embodiment, the 2.5D arc shape 5 is first machined and then the AG layer is formed, which is conducive to integrally forming the AG layer on the second side surface of the glass substrate 1. It can be understood that the edge area of ​​the second side surface of the glass substrate 1 is first cut by CNC equipment to form a chamfered surface, and then the chamfered surface is further polished to obtain the 2.5D arc surface 5.

[0037] In an optional embodiment of the present invention, after forming the 2.5D curved surface shape 5 on the first side surface of the glass substrate 1, the bottom ink embryo 20 is screen-printed on the second side surface of the glass substrate 1. The execution order of the relevant steps set in this embodiment is conducive to directly machining the 2.5D curved surface shape 5 with the help of the CNC equipment for cutting after obtaining a small glass substrate 1 from a large glass substrate, thereby reducing the transfer of workpieces and improving the processing efficiency.

[0038] In an optional embodiment of the present invention, Fig. 9 As shown, the method also includes: The entire outer surface of the AG layer 4 is coated with an AF film layer and / or an AR film layer 6 .

[0039] In this embodiment, by coating the entire outer surface of the AG layer 4 with an AF (Anti-fingerprint) and / or AR (Anti-Reflection) film layer 6, on the one hand, the inner AG layer 4 can be effectively protected, and on the other hand, the scratch and dirt resistance of the glass cover plate 1 can be enhanced and / or the performance of increasing the transmitted light and reducing the reflected light can be obtained accordingly.

[0040] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, which all belong to the protection scope of the present invention.

Claims

1. A method for processing a display glass cover, characterized in that: The method comprises the following steps: Printing ultraviolet-resistant ink on the first side surface of the glass substrate near the periphery by a screen printing process to form a bottom ink embryo; Baking the glass substrate at a baking temperature to preliminarily solidify the bottom ink embryo to form a bottom ink layer; Printing UV-resistant ink on the outer surface of the bottom ink layer by screen printing to form a surface ink embryo; sintering the glass substrate at a sintering temperature higher than the softening temperature of the glass substrate for a predetermined period of time and then rapidly cooling it to room temperature, so that the bottom ink layer and the surface ink embryo are sintered into one body to form a UV-resistant ink layer corresponding to the embedded glass substrate; and An AG etching process is used to form an AG layer on the second side surface of the glass substrate on which the UV-resistant ink layer is formed.

2. The method for processing a display glass cover plate according to claim 1, wherein: The mesh number T of the silk screen when printing the bottom layer ink embryo is greater than the mesh number T of the silk screen when printing the surface layer ink embryo.

3. The method for processing a display glass cover plate according to claim 1, wherein: The baking temperature is 145-155° C., and the corresponding baking time is 8-12 minutes.

4. The method for processing a display glass cover plate according to claim 1, wherein: The sintering temperature is 680-720° C., and the corresponding high-temperature sintering predetermined time is 4-6 minutes.

5. The method for processing a display glass cover plate according to claim 1, wherein: The rapid cooling is to place the semi-finished product after high-temperature sintering in a coolant for cooling so that the temperature of the semi-finished product drops to room temperature within 150 seconds.

6. The method for processing a display glass cover plate according to claim 1, wherein: The step of using the AG etching process to form the AG layer on the second side surface of the glass substrate having the UV-resistant ink layer formed thereon specifically includes: Laying a protective film on the outer surface of the UV-resistant ink layer and on the area of ​​the glass substrate where the AG layer does not need to be formed; Etching the area on the glass substrate where the protective film is not applied with an etching solution to obtain a microscopic pit morphology; Polishing the entire outer surface of the etched glass substrate to form the AG layer; and The protective film is removed.

7. The method for processing a display glass cover plate according to claim 6, wherein: The etching solution is an acidic etching solution, the etching time is 50-100s, the polishing time is 5-10min, the haze of the AG layer is 8%±3, the glossiness is 65±10GU, and the roughness is 0.12±0.03um.

8. The method for processing a display glass cover plate according to claim 1, wherein: Before forming the AG layer, the peripheral area of ​​the second side surface of the glass substrate is first formed into a 2.5D arc shape by machining.

9. The method for processing a display glass cover plate according to claim 8, wherein: After a 2.5D curved surface shape is formed on the first side surface of the glass substrate, a bottom ink embryo is screen-printed on the second side surface of the glass substrate.

10. The method for processing a display glass cover plate according to claim 1, wherein: The method further comprises: The entire outer surface of the AG layer is coated with an AF and / or AR film layer.

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