Application of high-transmittance glass composite material to glass button touch screen

Abstract

This application provides an application of a high-transmittance glass composite material in a glass button touchscreen. The glass button touchscreen includes a button layer and a display module. The button layer includes an upper glass cover and a lower glass cover, which are bonded together using a first optical adhesive. The preparation method of the upper glass cover includes: preparing a high-transmittance glass composite material; chemically etching the high-transmittance glass composite material; chemically strengthening the high-transmittance glass composite material; and coating an anti-glare coating on the outer side of the high-transmittance glass composite material. The anti-glare coating includes a nano-silica layer and a nano-titanium dioxide layer stacked sequentially. The anti-glare coating can form a submicron-level uneven structure and different refractive index interfaces on the surface of the upper glass cover, reducing the Fresnel reflection effect and achieving a synergistic effect of high light transmittance and anti-glare.

Description

Technical Field

[0001] This invention relates to the technical field of touch screens, and more particularly to the application of a high-transmittance glass composite material in glass button touch screens. Background Technology

[0002] Glass buttons are widely used in touchscreens due to their tactile feel, similar to traditional buttons. Outdoor touchscreens need to function properly under sunlight. Existing touchscreens may exhibit glare under sunlight, requiring a light-shielding component to ensure proper display. This light-shielding component needs to be additionally installed outside the touchscreen, impacting production efficiency and complicating the touchscreen structure, making assembly and handling difficult.

[0003] CN222952680U discloses a mid-touch barrier glass for outdoor touchscreens, including a touchscreen structure. An anti-glare film is applied to the inner wall of the surface glass. This anti-glare film reduces the reflective effect of the touchscreen structure in sunlight, improving screen visibility. The anti-glare film is made of TPU film, which has good weather resistance and light transmittance, as well as UV resistance and high-temperature resistance. However, under outdoor UV exposure, TPU film is prone to slight yellowing, affecting the light transmittance of the touchscreen. Summary of the Invention

[0004] This invention aims to at least partially solve one of the problems in related technologies. Therefore, one objective of this invention is to provide an application of a high-transmittance glass composite material in a glass-button touchscreen. The anti-glare coating includes a nano-silica layer and a nano-titanium dioxide layer, which can form a submicron-level uneven structure on the surface of the upper glass cover, causing incident light to undergo multi-angle diffuse reflection on the surface of the upper glass cover. Different refractive index interfaces are formed from the upper glass cover to the anti-glare coating, reducing the Fresnel reflection effect. Furthermore, the optical path interference between multiple interface layers cancels out reflected light, further improving the light transmittance of the glass, thus achieving a synergistic effect of high light transmittance and anti-glare.

[0005] An application of a high-transmittance glass composite material in a glass button touch screen, the glass button touch screen including a button layer and a display module, the button layer covering the outside of the display module; the button layer including an upper glass cover and a lower glass cover, the upper glass cover and the lower glass cover are bonded together by a first optical adhesive, the upper glass cover includes a button area and a non-button area, and the display module is provided with sensors corresponding one-to-one with the button area. The method for preparing the upper glass cover includes: Prepare high-transmittance glass composite materials with a thickness of 1 mm or less; Masking is applied to the non-button areas, and chemical etching is performed on the high-transmittance glass composite material. Chemically strengthen the high-transmittance glass composite material to form the button area located in the upper glass cover plate; An anti-glare coating is applied to the outside of a high-transmittance glass composite material. The anti-glare coating comprises a nano-silica layer and a nano-titanium dioxide layer stacked sequentially.

[0006] Furthermore, the method for preparing the lower glass cover includes: Prepare high-transmittance glass composite materials with a thickness of 1 mm or less; An anti-glare coating is applied to the outside of a high-transmittance glass composite material.

[0007] Furthermore, the nano-silica layer comprises nano-silica modified with dimethyldichlorosilane, and the nano-titanium dioxide layer comprises nano-titanium dioxide modified with dimethyldichlorosilane.

[0008] Furthermore, the preparation of high-transmittance glass composite materials specifically includes: Mix 38-42 parts of quartz sand, 13-15 parts of soda ash, 1-1.5 parts of sodium sulfate, 0.1-0.15 parts of CeO2, 3-4 parts of CaF2, 1-1.5 parts of TiO, and 1-1.5 parts of Na2SO4 evenly. Control the melting temperature at 1500℃ and hold for 30-40 minutes, then raise the temperature to 1550℃ and hold for 50-60 minutes, and lower the temperature to 1450℃ and hold for 30-40 minutes to obtain molten glass. Molten glass is poured into a forming mold and shaped, and the thickness of the shaped glass is less than or equal to 1 mm. Immerse the shaped glass in a solution of disodium hydroxyethylidene diphosphonate for 30-40 minutes; The soaked glass is then subjected to high-temperature dehydroxylation at 900-1200℃. The dehydroxylated glass is then annealed to obtain a high-transmittance glass composite material.

[0009] Furthermore, the cross-sectional area of ​​the button area is circular, and the inner diameter of the button area is 8-12mm.

[0010] Furthermore, a mask is applied to the non-button areas, and chemical etching is performed on the high-transmittance glass composite material, specifically including: A mask is applied to the non-button area, and a first etching solution is used to etch the high-transmittance glass composite material to form an initial groove; the first etching solution includes hydrofluoric acid, sulfuric acid, hydrochloric acid and deionized water; A silane coupling agent solution is applied to the sidewalls of the initial groove and at the junctions between the sidewalls and corners; the junctions between the sidewalls and corners refer to the areas where the bottom of the initial groove is less than or equal to 2 mm from the sidewall. A second etching solution is used to etch the high-transmittance glass composite material a second time to form the button area; the second etching solution includes hydrofluoric acid, sulfuric acid, hydrochloric acid solution, organic acid, ethylene glycol methyl ether and deionized water; the thickness at the corner of the button area is greater than the thickness in the middle area.

[0011] Furthermore, the second etching solution comprises the following components in weight fractions: 2-4 parts hydrofluoric acid, 7-9 parts sulfuric acid, 5-7 parts hydrochloric acid, 7-9 parts organic acid solution, 2-4 parts ethylene glycol methyl ether, and 78-82 parts deionized water.

[0012] Furthermore, the display module includes a touch screen, a liquid crystal display screen, and a backlight module. The touch screen is bonded to the button layer through a second optical adhesive layer, and the touch screen is bonded to the liquid crystal display screen through a third optical adhesive layer. The liquid crystal display screen is embedded inside the backlight module.

[0013] Furthermore, the parameters for pressing the first optical adhesive layer with the upper and lower glass cover plates are as follows: vacuum value of 30 kPa, vacuum time of 8 seconds, vacuum temperature of 40 seconds, bonding pressure of 0.4 MPa, and bonding time of 15 seconds.

[0014] Furthermore, the glass button touch screen is used as the control screen for outdoor electronic display devices.

[0015] Compared with the prior art, the technical solution provided in this application has the following advantages: This application provides an application of high transmittance glass composite material in a glass button touch screen. The upper glass cover is located in the area outside the glass button touch screen. After the upper glass cover is chemically etched and chemically strengthened to form the button area, an anti-glare coating is applied, which can achieve a better anti-glare effect. In this application, the anti-glare coating includes a nano-silica layer and a nano-titanium dioxide layer, which can form a submicron-level concave-convex structure on the surface of the upper glass cover, so that the incident light forms multi-angle diffuse reflection on the surface of the upper glass cover. Different refractive index interfaces are formed from the upper glass cover to the anti-glare coating, reducing the Fresnel reflection effect. The light path interference between multiple interface layers cancels the reflected light, further improving the light transmittance of the glass, and achieving a synergistic effect of high light transmittance and anti-glare. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] In the attached image: Figure 1 This is a schematic diagram of the structure in which the initial groove is formed in the glass substrate according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure in which the button groove is formed in the glass substrate according to an embodiment of this application; Figure 3 This is a schematic diagram of the structure in which the button area is formed on the glass substrate in an embodiment of this application.

[0019] Reference numerals: 11. Upper glass substrate; 12. Initial groove; 13. Button groove; 14. Button area. Detailed Implementation

[0020] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments are now described in detail. In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes rather than for limiting the scope of the invention, in order to provide a thorough understanding of the embodiments. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, mechanisms, circuits, and methods are omitted to avoid unnecessary detail that could obscure the description of the invention.

[0021] Example 1 This application provides an application of a high-transmittance glass composite material in a glass button touchscreen. The glass button touchscreen includes a button layer and a display module, with the button layer covering the outer side of the display module. The button layer includes an upper glass cover and a lower glass cover, which are bonded together using a first optical adhesive. The first optical adhesive completely covers the mating surface of the upper and lower glass covers, achieving a sealed bond between them. The button layer and the display module are then bonded together using a second optical adhesive, ensuring the overall sealing of the glass button touchscreen and giving it waterproof properties, allowing it to operate normally even in rainy weather.

[0022] The upper glass cover includes a button area and a non-button area, and the display module is provided with sensors that correspond one-to-one with the button area.

[0023] Specifically, the preparation method of the upper glass cover plate includes: Prepare high-transmittance glass composite materials with a thickness of 1 mm or less; Masking is applied to the non-button areas, and chemical etching is performed on the high-transmittance glass composite material to form button grooves located in the button areas; Chemical strengthening is applied to high-transmittance glass composite materials to form the button area within the upper glass cover. The main purpose of chemical strengthening is to increase the surface stress of the upper glass cover, thereby achieving scratch and impact resistance. The main principle involves immersing the upper glass cover in a potassium nitrate solution at 420 degrees Celsius, allowing for a thorough ion exchange between sodium ions on the surface of the upper glass cover and potassium ions in the potassium nitrate solution. This exchange takes 0.5 to 10 hours. Because potassium ions are larger than sodium ions, the mutual compression of potassium ions forms a stress layer on the upper glass cover, thus strengthening it. This chemical strengthening results in a raised button area.

[0024] An anti-glare coating is applied to the outer side of a high-transmittance glass composite material. The anti-glare coating comprises sequentially stacked nano-silica and nano-titanium dioxide layers. The upper glass cover is located in the area outside the glass button touchscreen. The anti-glare coating is applied to the upper glass cover after chemical etching and chemical strengthening to form the button area, achieving a better anti-glare effect. Furthermore, the anti-glare coating in this application, comprising nano-silica and nano-titanium dioxide layers, can form a submicron-level uneven structure on the surface of the upper glass cover, causing incident light to undergo multi-angle diffuse reflection on the surface of the upper glass cover. Different refractive index interfaces are formed from the upper glass cover to the anti-glare coating, reducing Fresnel reflection effects. The optical path interference between multiple interface layers cancels out reflected light, further improving the light transmittance of the glass, thus achieving a synergistic effect of high light transmittance and anti-glare.

[0025] Specifically, the preparation method of the lower glass cover includes: Prepare high-transmittance glass composite materials with a thickness of 1 mm or less; An anti-glare coating is applied to the outer side of the high-transmittance glass composite material. The lower glass cover does not require chemical strengthening or etching; the anti-glare coating is directly applied, and its thickness and composition are the same as those in the upper glass cover.

[0026] Example 2 An application of a high-transmittance glass composite material in a glass button touchscreen, wherein the glass button touchscreen includes a button layer and a display module, the button layer covering the outside of the display module; the button layer includes an upper glass cover and a lower glass cover, the upper and lower glass cover being bonded together by a first optical adhesive, the upper glass cover including button areas and non-button areas, and the display module being provided with sensors corresponding one-to-one with the button areas; when a button area is pressed against the first optical adhesive layer, the corresponding sensor can receive a touchscreen signal.

[0027] The display module includes a touchscreen, an LCD screen, and a backlight module arranged sequentially. The touchscreen is bonded to the button layer via a second optical adhesive layer, and to the LCD screen via a third optical adhesive layer. The backlight module has a recessed area, and the LCD screen is embedded within it. A sensor is located within the touchscreen. When a user presses a button area, a capacitive circuit is formed between the pressed button area and the sensor. Upon receiving a signal change, the sensor sends feedback to the host computer to activate the corresponding function. It should be noted that when a button area is pressed, the distance between the glass button and the sensor decreases, forming a capacitive circuit between the user's finger and the sensor, thus triggering the corresponding function. When the button area is not pressed, the distance between the glass button and the sensor is too large to form an effective capacitive circuit.

[0028] In this application, the glass button touch screen achieves sealing between different layers through the first optical adhesive layer, the second optical adhesive layer and the third optical adhesive layer, making the glass button touch screen waterproof and able to be used normally in outdoor rainy weather.

[0029] The method for preparing the upper glass cover plate in this application includes: S1: Preparation of high-transmittance glass composite materials with a thickness of 1 mm or less; specifically including: S11: Mix 38-42 parts of quartz sand, 13-15 parts of soda ash, 1-1.5 parts of sodium sulfate, 0.1-0.15 parts of CeO2, 3-4 parts of CaF2, 1-1.5 parts of TiO, and 1-1.5 parts of Na2SO4 evenly. Control the melting temperature at 1500℃ and hold for 30-40 minutes, then raise the temperature to 1550℃ and hold for 50-60 minutes, and finally lower the temperature to 1450℃ and hold for 30-40 minutes. In this step, 1550℃ allows the raw materials to form molten glass, and lowering the temperature to 1450℃ allows the molten glass to become fully clear. The quartz sand in this application contains the following components in parts by weight: SiO2 98.599 parts, Al2O3 0.25-0.4 parts, Fe2O3 0.04-0.08 parts; MgO 0.005-0.02 parts, K2O 0.05-0.2 parts. When using quartz sand as raw material, a small amount of other oxides besides silicon dioxide are introduced. These oxides combine with the hydroxyl groups in the glass, affecting the arrangement and distribution of the hydroxyl groups.

[0030] S12: Pour the molten glass into the forming template to form the glass. The thickness of the formed glass is less than or equal to 1 mm.

[0031] S13: Immerse the formed glass in a sodium hydroxyethylidene diphosphonate solution for 30-40 minutes. When thinner glass is immersed in the sodium hydroxyethylidene diphosphonate solution, the sodium hydroxyethylidene diphosphonate is adsorbed onto the glass surface, causing a rearrangement of the hydroxyl groups on the surface layer. With thinner glass, the proportion of hydroxyl groups in the surface layer is higher than the total hydroxyl groups, significantly improving the glass's light transmittance. However, with thicker glass, the proportion of hydroxyl groups in the surface layer is lower, and the improvement in light transmittance is not significant.

[0032] S14: The soaked glass is subjected to high-temperature dehydroxylation at 900-1200℃. In this application, Cl2 or SOCl2 is introduced during the high-temperature dehydroxylation process, and the hydroxyl groups are removed through a chemical reaction. The difference from existing technologies is that in this application, disodium hydroxyethylidene diphosphonate is adsorbed on the glass surface. Disodium hydroxyethylidene diphosphonate can dissolve metal surface oxides through complexation, causing the hydroxyl groups on the glass surface to rearrange. The rearranged hydroxyl groups can achieve efficient dehydroxylation at 800-1200℃, improving the dehydroxylation efficiency and thus increasing the light transmittance of the glass.

[0033] S15: The dehydroxylated glass undergoes annealing to obtain a high-transmittance glass composite material. The annealing temperature is specifically 500-600℃. Annealing can eliminate internal stress and defects in the glass and improve the mechanical properties of the upper glass cover.

[0034] S2: As Figures 1-2 As shown, a mask is applied to the non-button areas, and chemical etching is performed on the high-transmittance glass composite material; specifically including: S21: Mask the non-button area, and use the first etching solution to perform the first etching on the high-transmittance glass composite material to form the initial groove 12, such as... Figure 1 As shown. The first etching solution comprises the following components by weight fraction: 2-4 parts hydrofluoric acid, 7-9 parts sulfuric acid, 5-7 parts hydrochloric acid, and 78-82 parts deionized water.

[0035] In this application, a mask is used to cover the non-button areas, exposing the button areas. The first etching solution is a conventional etching solution, which can achieve uniform etching of the unmasked areas. After the first chemical etching, initial grooves 12 are distributed in a matrix in the upper glass cover plate 11, and the thickness of the initial grooves 12 is equal everywhere.

[0036] S22: Clean the glass surface with alcohol or acetone; activate the glass surface by plasma or ultraviolet irradiation; apply silane coupling agent solution to the sidewalls of the initial groove 12 and the junctions between the sidewalls and corners; the junctions between the sidewalls and corners refer to the areas where the bottom of the initial groove 12 is less than or equal to 2 mm from the sidewall.

[0037] The pH value of the silane coupling agent solution is 8-9; the silane coupling agent is γ-aminopropyltriethoxysilane. The connection point between the sidewall and the corner refers to the area where the bottom of the initial groove is 2 mm or less from the sidewall. The initial groove is a circle with an inner diameter of 8-12 mm, and the connection point between the sidewall and the corner refers to a 2 mm wide annular area at the bottom edge of the initial groove.

[0038] S23: A second etching solution is used to etch the high-transmittance glass composite material a second time, forming the button groove 13; the second etching solution includes hydrofluoric acid, sulfuric acid, hydrochloric acid solution, organic acid, ethylene glycol methyl ether, and deionized water; the thickness at the corners of the button groove 13 is greater than the thickness in the middle area, such as... Figure 2 As shown. After the second chemical etching, button grooves 13 are distributed in a matrix in the upper glass cover plate 11. The thickness of the corners of the button grooves is 0.1-0.25mm, and the thickness of the middle area of ​​the button grooves is 0.05-0.2mm.

[0039] In addition to conventional components, the second etching solution in this application also includes organic acids and ethylene glycol methyl ether. Ethylene glycol methyl ether enhances the solubility of organic acids and hydrofluoric acid, enabling the second etching solution to form a homogeneous phase. At the bottom of the initial groove and the corners of the sidewalls, due to the smaller radius of curvature and more disordered atomic arrangement, the surface energy is slightly higher. Based on this, after coating with a silane coupling agent, the silane coupling agent can form stable siloxane bonds with the glass surface, further enhancing the interfacial bonding force at the sidewalls and corners, and increasing the surface free energy at these locations. Simultaneously, the alkoxy groups in the silane coupling agent hydrolyze under alkaline conditions to generate silanol groups, which combine with the hydroxyl groups on the glass surface. The reactive groups in the silane coupling agent, such as amino groups, react with organic acids to form chemical bonds, thereby building molecular bridges between the glass and organic acids, accelerating the bonding between the organic acids and the glass. This bonding preferentially occurs at the corners where the surface energy is higher. Therefore, during the second etching, the organic acid in the second etching solution preferentially adsorbs on the sidewalls and corners with higher surface energy, forming occupants. The etching rate of these occupant areas by hydrofluoric acid is slightly lower. Therefore, during the second etching process, the etching depth of the middle area at the bottom of the initial groove is greater than the etching depth at the corner, ultimately making the thickness at the corner of the button groove 13 greater than the thickness of the middle area.

[0040] S3: Chemically strengthen the high-transmittance glass composite material to form the button area 14 located in the upper glass cover, such as... Figure 3 As shown. After chemical strengthening, the button areas 14 are distributed in a matrix in the upper glass cover plate 11.

[0041] The main purpose of chemical strengthening is to increase the surface stress of the touchscreen button glass, thereby making it scratch-resistant and impact-resistant. The main principle is to place the touchscreen button glass in a potassium nitrate solution at 420 degrees Celsius, allowing for sufficient ion exchange between sodium ions on the touchscreen button glass surface and potassium ions in the potassium nitrate solution. Because potassium ions are larger than sodium ions, the mutual compression of potassium ions forms a stress layer on the touchscreen button glass surface, thus strengthening the glass. After chemical strengthening, the bottom of the button groove 13 protrudes from the touchscreen button glass surface, forming a button area 14 that protrudes from the non-button area. During the chemical strengthening process, the bottom of the button groove 13 is thinner in the middle and thicker at the edges, concentrating the strengthening stress in the middle area of ​​the button groove 13. This allows for rapid and efficient formation of the target warp height, reducing the parameter requirements for chemical strengthening, improving the efficiency of chemical strengthening, and consequently increasing the production efficiency of touchscreens.

[0042] The height of the central protrusion of the button area 14 is greater than that of the edge protrusion. When the user operates, the central area is pressed first, which can provide the user with a keyboard-like pressing feel. At the same time, the central area of ​​the button position has a larger protrusion and the edge area has a smaller protrusion, which is convenient for touch and pressing.

[0043] S4: An anti-glare coating is applied to the outer side of the high-transmittance glass composite material. The anti-glare coating comprises sequentially stacked nano-silica layers and nano-titanium dioxide layers. Specifically, it includes: S41: Obtaining modified nano-silica: Nano-silica is dispersed in an organic solvent; the organic solvent is toluene.

[0044] Under stirring and inert gas protection, dimethyldichlorosilane was slowly added dropwise to carry out a reflux reaction; The reaction product was filtered and washed to obtain modified nano-silica. The particle size of the modified nano-silica was 20-30 nm.

[0045] S42: Obtaining modified nano-silica: Nano-titanium dioxide is dispersed in an organic solvent; the organic solvent is toluene.

[0046] Under stirring and inert gas protection, dimethyldichlorosilane was slowly added dropwise to carry out a reflux reaction; The reaction product was filtered and washed to obtain modified nano-titanium dioxide. The particle size of the modified nano-titanium dioxide was 25-35 nm.

[0047] S43: The modified nano-silica and modified nano-titanium dioxide are dissolved in toluene, respectively, to form a silica suspension and a titanium dioxide suspension. The glass is immersed in the silica suspension for 30 minutes, dried, and then immersed in the titanium dioxide suspension for 30 minutes to form a stacked nano-silica and nano-titanium dioxide coating on the glass surface.

[0048] In this application, dimethyldichlorosilane forms a stable siloxane (Si–O–Si) network on the surface of nano-silica, resulting in a submicron-level uneven structure in the nano-silica, causing incident light to undergo multi-angle diffuse reflection on the glass surface. The dimethyldichlorosilane-modified titanium dioxide surface forms a Si–O–Ti network, and the glass surface sequentially forms a transition between a glass layer, a silicon dioxide layer, and a titanium dioxide layer, reducing the Fresnel reflection effect and achieving the purpose of suppressing glare.

[0049] This step employs a solution immersion method to apply the surface coating, achieving global coating on all surfaces of the glass, including the top, bottom, and sides. By controlling the immersion time, the coating thickness is kept within a narrow range. The modified nano-silica and modified nano-titanium dioxide alter the light reflection pattern of the glass surface. Simultaneously, the optical path interference between multiple interface layers cancels out reflected light, further enhancing the glass's light transmittance and achieving a synergistic effect of high light transmittance and anti-glare.

[0050] The upper glass cover plate prepared in this application maintains a transmittance of 91%-95% in the visible light band (380-780nm) and a glare index (GI) of 10-12.

[0051] The method for preparing the lower glass cover plate in this application includes: S1: Prepare high-transmittance glass composite materials with a thickness of less than or equal to 1 mm; S2: Apply an anti-glare coating to the outside of the high-transmittance glass composite material.

[0052] The above steps are similar to the preparation method of the upper glass cover plate, without the need for chemical etching and chemical strengthening, and the thickness of the upper glass cover plate is less than that of the lower glass cover plate.

[0053] Example 3 An application of a high-transmittance glass composite material in a glass button touchscreen, wherein the glass button touchscreen includes a button layer and a display module, the button layer covering the outside of the display module; the button layer includes an upper glass cover and a lower glass cover, the upper and lower glass cover being bonded together by a first optical adhesive, the upper glass cover including button areas and non-button areas, and the display module being provided with sensors corresponding one-to-one with the button areas; when a button area is pressed against the first optical adhesive layer, the corresponding sensor can receive a touchscreen signal.

[0054] The display module includes a touchscreen, an LCD screen, and a backlight module arranged sequentially. The touchscreen is bonded to the button layer via a second optical adhesive layer, and to the LCD screen via a third optical adhesive layer. The backlight module has a recessed area, and the LCD screen is embedded within it. A sensor is located within the touchscreen. When a user presses a button area, a capacitive circuit is formed between the pressed button area and the sensor. Upon receiving a signal change, the sensor sends feedback to the host computer to activate the corresponding function. It should be noted that when a button area is pressed, the distance between the glass button and the sensor decreases, forming a capacitive circuit between the user's finger and the sensor, thus triggering the corresponding function. When the button area is not pressed, the distance between the glass button and the sensor is too large to form an effective capacitive circuit.

[0055] When using the first photoresist to bond the upper and lower glass cover plates, the upper glass cover plate, the first optical adhesive layer, and the lower glass cover plate need to be stacked and vacuumed before bonding to achieve a tight bond. The parameters for bonding the first optical adhesive layer to the upper and lower glass cover plates are as follows: vacuum value of 30 kPa, vacuum time of 8 seconds, vacuum temperature of 40 seconds, bonding pressure of 0.4 MPa, and bonding time of 15 seconds. Under these bonding parameters, no air bubbles are generated in the button layer, and the button pressing function is normal.

[0056] In this application, a glass button touchscreen is used as a control screen for outdoor electronic display devices, such as outdoor mixing consoles and outdoor robot control screens. A first, second, and third optical adhesive are used to achieve a sealed combination between the button layer and the display module, giving the control screen a waterproof function. The outer sides of the upper and lower glass cover plates of this application are provided with an anti-glare coating. This anti-glare coating not only prevents glare but also improves light transmittance.

[0057] In this application, the button area is located inside the display screen, and the location of the button area has good light transmittance and can be displayed simultaneously. This avoids the defects of the prior art where the button area is located on the side of the display screen, thereby maximizing the display screen area and achieving harmonious coexistence of display and button control.

[0058] It is understood that the above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can freely combine the above technical features without departing from the concept of the present invention, and can also make several modifications and improvements, all of which fall within the protection scope of the present invention. Therefore, all equivalent transformations and modifications made with respect to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. The application of a high-transmittance glass composite material in a glass button touchscreen, characterized in that, The glass button touch screen includes a button layer and a display module. The button layer covers the outside of the display module. The button layer includes an upper glass cover and a lower glass cover. The upper glass cover and the lower glass cover are bonded together by a first optical adhesive. The upper glass cover includes a button area and a non-button area. The display module is provided with sensors that correspond one-to-one with the button areas. The method for preparing the upper glass cover includes: Prepare high-transmittance glass composite materials with a thickness of 1 mm or less; Masking is applied to the non-button areas, and chemical etching is performed on the high-transmittance glass composite material. Chemically strengthen the high-transmittance glass composite material to form the button area located in the upper glass cover plate; An anti-glare coating is applied to the outside of a high-transmittance glass composite material. The anti-glare coating comprises a nano-silica layer and a nano-titanium dioxide layer stacked sequentially.

2. The application of the high transmittance glass composite material according to claim 1 in a glass button touch screen, characterized in that, The method for preparing the lower glass cover includes: Prepare high-transmittance glass composite materials with a thickness of 1 mm or less; An anti-glare coating is applied to the outside of a high-transmittance glass composite material.

3. The application of a high-transmittance glass composite material according to claim 1 or 2 in a glass button touch screen, characterized in that, The nano-silica layer comprises nano-silica modified with dimethyldichlorosilane, and the nano-titanium dioxide layer comprises nano-titanium dioxide modified with dimethyldichlorosilane.

4. The application of a high-transmittance glass composite material according to claim 1 or 2 in a glass button touch screen, characterized in that, The preparation of high-transmittance glass composite materials specifically includes: Mix 38-42 parts of quartz sand, 13-15 parts of soda ash, 1-1.5 parts of sodium sulfate, 0.1-0.15 parts of CeO2, 3-4 parts of CaF2, 1-1.5 parts of TiO, and 1-1.5 parts of Na2SO4 evenly. Control the melting temperature at 1500℃ and hold for 30-40 minutes, then raise the temperature to 1550℃ and hold for 50-60 minutes, and lower the temperature to 1450℃ and hold for 30-40 minutes to obtain molten glass. Molten glass is poured into a forming mold and shaped, and the thickness of the shaped glass is less than or equal to 1 mm. Immerse the shaped glass in a solution of disodium hydroxyethylidene diphosphonate for 30-40 minutes; The soaked glass is then subjected to high-temperature dehydroxylation at 900-1200℃. The dehydroxylated glass is then annealed to obtain a high-transmittance glass composite material.

5. The application of the high transmittance glass composite material according to claim 1 in a glass button touch screen, characterized in that, The cross-sectional area of ​​the button area is circular, and the inner diameter of the button area is 8-12mm.

6. The application of the high transmittance glass composite material according to claim 5 in a glass button touch screen, characterized in that, Masking is applied to the non-button areas, and chemical etching is performed on the high-transmittance glass composite material, specifically including: A mask is applied to the non-button area, and a first etching solution is used to etch the high-transmittance glass composite material to form an initial groove; the first etching solution includes hydrofluoric acid, sulfuric acid, hydrochloric acid and deionized water; A silane coupling agent solution is applied to the sidewalls of the initial groove and at the junctions between the sidewalls and corners; the junctions between the sidewalls and corners refer to the areas where the bottom of the initial groove is less than or equal to 2 mm from the sidewall. A second etching solution is used to etch the high-transmittance glass composite material a second time to form the button area; the second etching solution includes hydrofluoric acid, sulfuric acid, hydrochloric acid solution, organic acid, ethylene glycol methyl ether and deionized water; the thickness at the corner of the button area is greater than the thickness in the middle area.

7. The application of a high transmittance glass composite material according to claim 6 in a glass button touch screen, characterized in that, The second etching solution comprises the following components in weight fractions: 2-4 parts hydrofluoric acid, 7-9 parts sulfuric acid, 5-7 parts hydrochloric acid, 7-9 parts organic acid solution, 2-4 parts ethylene glycol methyl ether, and 78-82 parts deionized water.

8. The application of the high transmittance glass composite material according to claim 1 in a glass button touch screen, characterized in that, The display module includes a touch screen, an LCD screen, and a backlight module. The touch screen is bonded to the button layer through a second optical adhesive layer, and the touch screen is bonded to the LCD screen through a third optical adhesive layer. The LCD screen is embedded inside the backlight module.

9. The application of the high transmittance glass composite material according to claim 1 in a glass button touch screen, characterized in that, The parameters for pressing the first optical adhesive layer with the upper and lower glass cover plates are as follows: vacuum value of 30 kPa, vacuum time of 8 seconds, vacuum temperature of 40 seconds, bonding pressure of 0.4 MPa, and bonding time of 15 seconds.

10. The application of the high transmittance glass composite material according to claim 1 in a glass button touch screen, characterized in that, The glass button touch screen is used as the control screen for outdoor electronic display devices.

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