A full-laminated touch screen assembly and a manufacturing method thereof

Abstract

The application provides a full-laminated touch screen assembly and a preparation method thereof, and relates to the technical field of photoelectric display. The full-laminated touch screen assembly is composed of a full-laminated structure formed by sequentially laminating a cover plate subjected to anti-glare, anti-fingerprint and anti-reflection treatment, an SCA optical adhesive layer with light transmission and UV curing, and a high color gamut display module. The structure sequentially laminates the cover plate with anti-glare, anti-fingerprint and anti-reflection functions, the SCA optical adhesive layer with good light transmission and UV curing, and the high color gamut display module to form a full-laminated assembly without air gap, effectively improves display brightness, color restoration and picture definition, reduces reflection and fingerprint interference, enhances touch sensitivity and structural stability, and improves overall visual experience and use reliability.

Description

Technical Field

[0001] This invention relates to the field of optoelectronic display technology, and more specifically, to a fully laminated touch screen assembly and its manufacturing method. Background Technology

[0002] As consumer electronics products continue to evolve towards higher resolution, larger sizes, and thinner designs, touch display technology has become a key human-computer interaction method in various application scenarios, including smartphones, tablets, automotive instruments, and industrial control terminals. The touchscreen assembly, as the core module for image display and touch response, is closely related to optical display quality and user experience. A touchscreen assembly typically consists of a cover glass, a touch sensing layer, an optical adhesive layer, and a display module. Different bonding processes determine the display panel's imaging quality, anti-interference capability, and mechanical stability. In mainstream manufacturing processes, frame bonding and full bonding are common assembly methods. Frame bonding, due to its simpler process and lower cost, is still widely used in mid-to-low-end touch products.

[0003] In existing touchscreen products, a frame-mount process is commonly used to assemble the touchscreen assembly. This process typically involves bonding a standard glass cover to the display module using OCA (Optically Clear Adhesive) at the edges, creating an air gap in the central area. This structure avoids large-area bonding operations, reducing the risk of air bubbles and low yield rates during the bonding process, and facilitating repair or replacement. However, in frame-mount structures, the front of the cover often lacks surface treatments such as anti-glare, anti-fingerprint, or anti-reflective coatings, and it does not achieve a seamless optical connection with the display module, resulting in overall display performance and touch experience that fails to meet the demands of high-end displays.

[0004] Due to optical refraction and scattering caused by the air layer in the frame-mount process, the screen is prone to severe reflection and glare in strong light environments, affecting visual clarity. Simultaneously, the untreated cover glass surface easily leaves fingerprints, degrading the visual experience. Furthermore, the overall light transmittance of ordinary modules combined with untreated glass cover glass, bonded with SCA adhesive, is low, resulting in a blurry, grayish visual effect and difficulty in displaying the color gradations of high-definition images. When displaying animation, games, or high-frame-rate high-definition videos, color distortion, color gradation breaks, and unnatural color transitions are likely to occur, affecting image fidelity and realism. Especially against gradient backgrounds, ordinary modules are more prone to exhibiting obvious color layering, limiting the range of colors that can be displayed.

[0005] Furthermore, the touch experience under the frame-mount structure also has shortcomings. Because the center of the screen is not bonded, touch response delays and low sensitivity are frequent occurrences. This is especially true in high-precision interaction scenarios such as multi-touch and edge swiping, where uneven response or accidental touches are noticeable. These issues not only reduce end-user satisfaction but also limit the further application of this technology in high-end smart terminal products. Therefore, existing touchscreen assemblies still have significant areas for improvement in terms of display quality, touch performance, and surface stain resistance.

[0006] In view of this, the present invention is hereby proposed. Summary of the Invention

[0007] The purpose of this invention is to provide a fully laminated touch screen assembly and its manufacturing method. The fully laminated touch screen assembly effectively improves display brightness and color reproduction, reduces reflection and fingerprint interference, enhances touch sensitivity and structural stability, and improves overall visual effect and user experience by bonding an anti-glare cover plate, a light-transmitting SCA optical adhesive and a high color gamut module without air gaps.

[0008] In order to achieve the above-mentioned objectives of the present invention, the following technical solution is adopted: In a first aspect, the present invention provides a fully laminated touch screen assembly, which comprises a fully laminated structure consisting of a cover plate treated with anti-glare, anti-fingerprint and anti-reflection, a light-transmitting and UV-curable SCA optical adhesive layer, and a high color gamut display module, which are sequentially laminated together.

[0009] In an optional embodiment, the SCA optical adhesive layer comprises the following components in parts by weight: EVA resin 95-98; Crosslinking agent 0.2-1; Coupling agent 0.2–1; Photoinitiator 0.1–1; Microcrystalline wax 1-3; In an optional embodiment, the EVA resin comprises vinyl acetate at a mass percentage of 5% to 40%. In an optional embodiment, the melt index of the EVA resin is 10 g / 10 min to 400 g / 10 min; In an optional embodiment, the crosslinking agent is selected from at least one of tert-butyl peroxide-2-ethylhexanoate, 1,1-di-tert-butylperoxide-3,3,5-trimethylcyclohexane, 2,5-dimethyl-2,5-di-tert-butylperoxide, tert-amyl peroxide (2-ethylhexyl) carbonate, and tert-butyl peroxide-2-ethylhexyl carbonate. In an optional embodiment, the coupling agent is a silane coupling agent; In an optional embodiment, the coupling agent is selected from at least one of vinyltris(methoxyethoxy)silane, γ-(2,3-epoxypropoxy)propyltrimethoxysilane, γ-methacryloyloxypropyltrimethoxysilane, N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, and N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane; In an optional embodiment, the photoinitiator is selected from at least one of 1-hydroxycyclohexylphenyl ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, photoinitiator TPO, and 4-phenylbenzophenone; In an optional embodiment, the photoinitiator is a mixed photoinitiator composed of 1-hydroxycyclohexylphenyl ketone and 2-hydroxy-2-methyl-1-phenyl-1-propanone in a mass ratio of 2:1.

[0010] In an optional embodiment, the transmittance of the SCA optical adhesive layer is ≥95%; and / or, In an optional embodiment, the viscosity of the SCA optical adhesive layer is between 1000 cps and 3000 cps; and / or, In an optional embodiment, the UV curing wavelength of the SCA optical adhesive layer is 365nm~405nm, and the curing time is less than 15 seconds; and / or, In an optional embodiment, the high color gamut display module includes phosphor and silicone. In an optional embodiment, the phosphor comprises 0.7 to 1.3 parts of yellow-green powder, 0.2 to 1.0 parts of yellow powder, and 0.06 to 0.15 parts of orange-red powder, and no more than 10% of red powder; in an optional embodiment, the silica gel comprises 1.2 to 1.5 parts by weight of A glue and 5.0 to 6.0 parts by weight of B glue; in an optional embodiment, the mass ratio of the phosphor to the silica gel is (0.05 to 0.12):1; and / or, In an optional embodiment, the cover plate includes an AF layer, an AR layer, an AG layer, a glass layer, and a screen printing layer arranged sequentially; in an optional embodiment, the thickness of the AF layer is 2nm~10nm; in an optional embodiment, the thickness of the AR layer is 0.06mm~0.17mm; in an optional embodiment, the thickness of the AG layer is 0.05mm~0.2mm.

[0011] In an optional embodiment, the cover plate thickness is 0.4 mm to 6.0 mm; and / or, The thickness of the SCA optical adhesive layer is 0.15mm~0.3mm; and / or, The thickness of the high color gamut display module is 2.0mm~3.0mm.

[0012] In an optional embodiment, the fully laminated touch screen assembly further includes a sensor functional sheet and an OCA adhesive sequentially disposed between the SCA optical adhesive layer and the high color gamut display module; In an optional embodiment, the thickness of the cover plate is 0.4 mm to 6.0 mm; In an optional embodiment, the thickness of the SCA optical adhesive layer is 0.15 mm to 0.3 mm; In an optional embodiment, the thickness of the sensor functional sheet is 0.55mm to 1.1mm; In an optional embodiment, the thickness of the OCA adhesive is 0.2 mm to 0.3 mm; In an optional embodiment, the thickness of the high color gamut display module is 2.0mm to 4.0mm.

[0013] In an optional embodiment, the high color gamut display module includes a module frame, and a light source and an optical film assembly disposed within the module frame; the optical film assembly includes a reflective sheet, a light guide plate, and a diffuser sheet stacked sequentially. Preferably, the reflective sheet is made of PET and has a thickness of 0.5 mm; Preferably, the light guide plate is made of PMMA and has a thickness of 2.0 mm; Preferably, the diffuser sheet is made of PET, has a thickness of 1.0 mm, and a transmittance of 40%.

[0014] In an optional implementation, the high color gamut display module is an edge-lit backlight structure or a direct-lit backlight structure. When the high color gamut display module is a side-lit backlight structure, the light guide plate is provided with dimming dots. The dimming dots are densely arranged on the side away from the light source and sparsely arranged on the side closer to the light source, showing a gradient decreasing pattern. When the high color gamut display module has a direct-lit backlight structure, the light guide plate is provided with dimming dots, which correspond one-to-one with the light source below and are evenly distributed in a regular matrix; and / or, The light source is an LED lamp bead, and the operating parameters of the LED lamp bead meet at least one of the following conditions: A. Operating current is 58mA~61mA; B. Forward voltage is 2.6V~2.9V; C. Power is 160mW~170mW; D. Luminous flux is 25lm~32lm; E. Luminous efficacy is 150lm / W~185lm / W; E. Color rendering index Ra is 75~90; Preferably, when the high color gamut display module is a direct-lit backlight structure, the LED lamp bead is also covered with a glass lens.

[0015] Secondly, the present invention provides a method for manufacturing a fully laminated touchscreen assembly as described in any of the foregoing embodiments, comprising: The cover plate is subjected to surface treatment to obtain a surface-treated cover plate; the surface treatment includes anti-glare treatment, anti-reflection treatment and anti-fingerprint treatment. The surface-treated cover plate, SCA optical adhesive layer and high color gamut display module are sequentially bonded together to obtain a gapless fully laminated touch screen assembly.

[0016] In an optional implementation, the anti-glare treatment includes: The cover plate is cleaned. The surface of the cover plate after cleaning is corroded with hydrofluoric acid solution, and the corroded cover plate is subjected to multi-stage sandblasting treatment. The frosted cover plate is then washed, polished, and dried to form an AF layer. In an optional embodiment, the volume ratio of the hydrofluoric acid solution is 1:(10~20); In an optional embodiment, the thickness of the AG layer is 0.05 mm to 0.2 mm; In an optional embodiment, the frosting agent used in the multi-stage frosting treatment comprises the following components in parts by weight: Ammonium bifluoride 20~30; Ammonium fluorosilicate 5~10; Hydrochloric acid 0~10; Citric acid 5~10; Ammonium fluorosilicate 2~8; Calcium fluoride 10~20; Water 20~25; Viscosity modifier 2-4; Preferably, the cleaning agent used in the cleaning process includes: 5% ethylene glycol monobutyl ether, 0.3% additive, 12% propanol, 0.8% nonylphenol polyoxyethylene ether, 0.3% nonionic surfactant, and the balance being water; Preferably, the cleaning agent used in the cleaning process includes: 0.30% fatty alcohol polyoxygen, 2.5% ammonia (28%), 3% ethylene ether, 0.01% to 3% fragrance, and the balance being water.

[0017] In an optional implementation, the anti-reflection treatment includes: In a vacuum environment, an antireflective membrane material is deposited on the surface of the cover plate using a physical vapor deposition process to form a deposited film layer. The film layer is cooled and cured to form an AR layer; In an optional embodiment, the deposition temperature is 250°C to 450°C; In an optional implementation, the operating pressure of the sputtering deposition process is 10. -2 Pa ~ 10 Pa; In an optional embodiment, the working pressure of ion plating during the deposition process is 10. -5 Pa~10 -6 Pa; In an optional embodiment, the deposition rate of the sputtered film during the deposition process is 0.01 μm / min to 0.5 μm / min; In an optional embodiment, the deposition rate of ion plating during the deposition process is 0.1 μm / min to 50 μm / min.

[0018] In an optional implementation, the anti-fingerprint treatment includes: The cover plate is cleaned and then fixed on the stage of the vacuum evaporation coating equipment. Under vacuum conditions, the evaporation source is activated to deposit an AF layer containing SiO2 on the surface of the cover plate.

[0019] In an optional embodiment, the step of sequentially bonding the surface-treated cover plate, SCA optical adhesive layer, and high color gamut display module includes: In a vacuum environment, the cover plate is bonded to SCA adhesive, and then subjected to a first vacuum degassing treatment and UV curing treatment to obtain a bonded structure with the SCA optical adhesive layer. The SCA optical adhesive layer in the bonding structure is bonded to the high color gamut display module on the side away from the cover plate, and then subjected to a second vacuum debubbling process to obtain the fully bonded touch screen assembly. In an optional embodiment, the temperature of the first vacuum degassing treatment is 50°C to 60°C; In an optional embodiment, the first vacuum degassing treatment takes no less than 30 minutes; In an optional embodiment, the first vacuum degassing treatment is carried out under a pressure of not less than 0.6 MPa; In an optional embodiment, the temperature of the second vacuum degassing treatment is 50°C to 60°C; In an optional embodiment, the second vacuum degassing treatment takes 20 to 30 minutes; In an optional embodiment, the second vacuum degassing treatment is carried out under a pressure of not less than 0.6 MPa.

[0020] Compared with existing technologies, this invention provides a fully laminated touchscreen assembly and its manufacturing method. The fully laminated touchscreen assembly achieves multifaceted performance improvements by sequentially bonding an anti-glare, anti-fingerprint, and anti-reflective cover plate to an SCA optical adhesive layer and a high color gamut display module. Firstly, the multiple processing steps on the cover plate surface significantly improve the visibility and cleanliness of the display screen: the anti-glare treatment effectively reduces reflection interference from external light sources, improving readability in strong light environments; the anti-reflective treatment further reduces optical reflectivity, enhancing image contrast; and the anti-fingerprint treatment reduces fingerprint residue, maintaining a clean and clear screen surface.

[0021] SCA optical adhesive layers possess excellent light transmittance and UV-curable properties, enabling them to provide high transparency during bonding, ensuring image clarity and true-to-life color reproduction, while also forming a stable and reliable structural bond through UV curing, enhancing the overall reliability and bonding strength of the product. The high light transmittance of SCA adhesive also helps reduce light loss, improving display brightness and color saturation.

[0022] High color gamut display modules significantly expand the range of color coverage, making images more vivid, delicate, and with natural color transitions. Especially when displaying high-resolution, gradient, or animated images, they can effectively reduce problems such as color gradation breakage and color distortion, and improve visual fidelity and immersion.

[0023] The three components are bonded together in a gapless manner to form a complete optical laminate structure. This not only improves the overall display performance and touch sensitivity but also enhances the structural resistance and sealing, helping to prevent external dust or moisture from entering the interface layer and extending the overall lifespan of the device. The overall structure boasts excellent optical performance, user experience, and structural stability, making it suitable for terminal electronic products with high requirements for display effects and touch response.

[0024] Overall, the high color gamut module using this fully laminated structure and specific parameters can improve color accuracy (ΔE) by 28%~30% and color saturation (Rg) by 20%~25% compared to traditional structures. In terms of visual health and image quality, details (highlight areas) are improved by more than 10%, naturalness is improved by more than 178%, while the blue light ratio is reduced by 5%~8% and visual fatigue is reduced by 24%~30%, achieving excellent healthy and natural eye protection and true color display effects. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a cross-sectional structural diagram of the fully laminated touch screen assembly provided in the embodiments of this application; Figure 2 This is a cross-sectional structural diagram of the fully laminated touch screen assembly (including sensor functional sheet and OCA adhesive) provided in the embodiments of this application; Figure 3 This is a cross-sectional structural diagram of the cover plate in the fully laminated touch screen assembly provided in this application embodiment; Figure 4 This is a flowchart illustrating the manufacturing method of the fully laminated touchscreen assembly provided in the embodiments of this application; Figure 5 This is a schematic diagram of the side-lit backlight strip structure provided in the embodiments of this application; Figure 6 This is a schematic diagram of the direct-lit backlight strip structure provided in the embodiments of this application; Figure 7 This is a schematic cross-sectional view of the side-lit backlight structure provided in the embodiments of this application; Figure 8 This is a schematic diagram of the cross-section of the direct-lit backlight structure provided in the embodiments of this application; Figure 9 This is an exploded view showing the location and structure of the high color gamut display module provided in this embodiment of the application within an LCD screen.

[0027] Key component symbols: 100-Fully laminated touchscreen assembly; 1-Cover plate; 11-AF layer; 12-AR layer; 13-AG layer; 14-Glass layer; 15-Silicone layer; 2-SCA optical adhesive layer; 3-Sensor functional sheet; 4-OCA adhesive; 5-High color gamut display module; 51-PCB board; 52-LED beads; 53-Block; 54-Optical film; 541-Prism sheet; 55-Reflective sheet; 56-Light guide plate; 57-Dimming dots; 58-Diffuser; 59-Positive electrode; 60-Negative electrode; 61-Light source reflector; 62-Lamp tube; 63-Glass lens; 64-Optical film assembly. Detailed Implementation

[0028] The embodiments of the present invention will be described in detail below with reference to examples. However, those skilled in the art will understand that the following examples are for illustrative purposes only and should not be considered as limiting the scope of the invention. Unless otherwise specified in the examples, conventional conditions or conditions recommended by the manufacturer are followed. Reagents or instruments whose manufacturers are not specified are all commercially available conventional products.

[0029] refer to Figure 1 , Figure 1 This is a cross-sectional structural diagram of the fully laminated touchscreen assembly provided in this application embodiment. In this application embodiment, a fully laminated touchscreen assembly 100 is provided, which consists of a cover plate 1 treated with anti-glare, anti-fingerprint, and anti-reflection measures, a light-transmitting and UV-curable SCA optical adhesive layer 2, and a high color gamut display module 5, all sequentially laminated together.

[0030] The aforementioned cover plate 1 (treated with anti-glare, anti-fingerprint and anti-reflection) serves as the outermost glass protective layer of the touchscreen in the overall structure, and is the area where the user directly contacts the operation area.

[0031] In this embodiment, the cover plate 1 has undergone surface treatment, including: (1) Anti-glare (AG) treatment: forming microstructures or etching patterns on the glass surface to diffuse reflected light and reduce glare; (2) Anti-reflection (AR) treatment: Add multiple optical thin films to the glass surface to reduce the interface reflectivity; (3) Anti-fingerprint (AF) treatment: Reduce oil stain adhesion by applying a low surface energy organic coating (such as fluoride).

[0032] In terms of implementation, for example, AG treatment can be prepared by chemical etching (such as oxalic acid etching) or sandblasting; AR layer 12 adopts vacuum coating technology to control the refractive index gradient; AF layer 11 is formed by coating and then cured by ultraviolet or heat treatment.

[0033] Traditional cover plates 1 suffer from severe glare and are easily stained, negatively impacting the user experience. The cover plate 1 provided in this embodiment can improve outdoor visibility and reduce glare; reduce fingerprint residue and maintain visual cleanliness; and improve contrast and image sharpness.

[0034] The aforementioned SCA optical adhesive layer 2 (Silicone Clear Adhesive) is a special adhesive layer disposed between the cover plate 1 and the module in this embodiment, used to provide optical connection and bonding strength.

[0035] It can use UV-curable transparent silicone, which has good light transmittance and controllable viscosity. The formulation can include, but is not limited to, EVA, photoinitiators, coupling agents, crosslinking agents, microcrystalline wax, etc., to ensure the stability of optical and mechanical properties. It is bonded in a vacuum environment without bubbles, with a UV curing time of less than 15 seconds, a wavelength of 365nm~405nm, an optical transmittance of ≥95%, and a viscosity controlled between 1000~3000cps. This adhesive layer provides a uniform and stable optical path, eliminates air layer reflection, cures quickly, has high bonding strength, is not easily displaced, and has good adhesion to the cover plate 1 and module interface, effectively solving problems such as glare, blurring, and touch lag caused by air layers in frame-mounted structures.

[0036] The aforementioned high color gamut display module 5 can be composed of an LED backlight, phosphors, a light guide layer, etc., to achieve high-fidelity image display. Its improved processing includes using a composite phosphor system (such as yellow-green phosphor and orange-red phosphor) to improve color gamut coverage, and combining it with high-refractive-index silicone to enhance luminous efficiency and ensure accurate colorimetry.

[0037] In terms of implementation, the ratio of phosphor to silicone was optimized (0.7~1.3 parts yellow-green phosphor and 0.06~0.15 parts orange-red phosphor), and the overall thickness of the module was controlled within the range of 2.0~4.0mm. This module has the advantages of rich colors, natural transitions, and strong detail expression. It can effectively improve color distortion and layering problems, and is suitable for high color scenarios such as videos and games. It solves the problems of ordinary modules displaying grayish colors and severe distortion, especially the phenomenon of step breaks in gradient backgrounds.

[0038] The connection is achieved through a sequential bonding process. For example, the cover plate 1 can be vacuum-bonded to the SCA optical adhesive first, followed by UV curing, then bonding to the module, and finally vacuum degassing. This improved bonding sequence avoids air bubbles generated during early module bonding, preferentially forming a stable intermediate layer to improve bonding accuracy. The subsequent degassing process also enhances overall optical integrity. Its structural advantages include achieving gapless bonding, eliminating interface refraction, enhancing mechanical strength and sealing, and improving touch response sensitivity. Specific equipment includes a vacuum bonding machine, a degassing device (pressure 0.6MPa, temperature 50-60°C, 30 minutes), and a UV curing device.

[0039] In summary, this fully laminated structure has undergone systematic optimization in terms of material properties, optical processing, bonding process, and display performance, effectively solving problems such as heavy reflection, poor color, and unstable structure of traditional touch screens, and achieving high-quality display and excellent touch experience.

[0040] In some embodiments, the SCA optical adhesive layer 2 comprises the following components in parts by weight: EVA resin 95-98; for example, it can be 95, 96, 97, 98, etc. EVA resin is the main material, giving the adhesive layer flexibility, transparency and processability, and is the matrix of optical adhesives; the vinyl acetate content affects the bonding performance and light transmittance.

[0041] The crosslinking agent is applied at a concentration of 0.2–1; for example, concentrations of 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, etc. The crosslinking agent promotes the formation of a three-dimensional crosslinked network in the EVA structure, improving thermal stability, mechanical strength, and aging resistance; free radical crosslinking is achieved using organic peroxides.

[0042] Coupling agent 0.2-1; for example, it can be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, etc. It is used to improve the adhesion between the organic (EVA) and inorganic (cover plate 1, module surface) interfaces and enhance the bonding strength and weather resistance of the adhesive layer.

[0043] Photoinitiator: 0.1–1; for example, it can be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, etc. Used to rapidly generate free radicals under UV light, achieving rapid curing, improving production efficiency, and reducing the heat-affected zone; mixed initiators are commonly used to improve reaction efficiency.

[0044] Microcrystalline wax 1-3; for example, it can be 1, 2, 3, etc. Used to adjust the rheology and release properties of the colloid, helping to control viscosity, improve processing performance, and prevent interfacial adhesion.

[0045] Furthermore, the preparation process of the SCA optical adhesive layer 2 in this embodiment can be as follows: Step S1: Preheating and melting. Weigh the EVA resin according to the stated weight proportions and add it to the reactor. Heat to 80℃~100℃ to completely melt it.

[0046] Step S2: Vacuum mixing. In a light-protected environment, add microcrystalline wax, crosslinking agent and coupling agent to the reactor in sequence. Turn on the vacuum pump to maintain the pressure inside the reactor at -0.08MPa to -0.1MPa. Stir continuously at 500~800rpm for 20~30 minutes to ensure that the additives are evenly dispersed in the resin matrix.

[0047] Step S3: Add initiator. After the material in the reactor cools down to 50℃~60℃, add the photoinitiator and continue stirring at low speed for 10~15 minutes.

[0048] Step S4: Coating and Molding. The obtained mixed adhesive solution is evenly coated onto the surface of the PET release film using a slit coater, and then cooled and shaped by a cooling roller to obtain a semi-solid SCA optical adhesive film with a thickness of 0.15mm~0.3mm, which is then rolled up for later use.

[0049] In some embodiments, the EVA resin comprises 5% to 40% vinyl acetate by weight. For example, it can be 5%, 6%, 7%, 8%, 9%, 10%, 20%, 30%, 40%, etc.

[0050] EVA resin is an ethylene-vinyl acetate copolymer resin. The higher the content, the better the transparency, but the adhesion and weather resistance need to be reinforced by crosslinking agents. In some embodiments, the melt flow index of the EVA resin is 10 g / 10 min to 400 g / 10 min; for example, it can be 10 g / 10 min, 20 g / 10 min, 30 g / 10 min, 50 g / 10 min, 80 g / 10 min, 100 g / 10 min, 200 g / 10 min, 300 g / 10 min, 400 g / 10 min, etc. The melt flow index represents the flowability range, which can be adapted to different viscosity requirements and coating equipment.

[0051] In some embodiments, the crosslinking agent is selected from at least one of tert-butyl peroxide-2-ethylhexanoate, 1,1-di-tert-butylperoxide-3,3,5-trimethylcyclohexane, 2,5-dimethyl-2,5-di-tert-butylperoxide, tert-pentyl peroxide (2-ethylhexyl) carbonate, and tert-butyl peroxide-2-ethylhexyl carbonate.

[0052] In some embodiments, the coupling agent is a silane coupling agent.

[0053] In some embodiments, the coupling agent is selected from at least one of vinyltris(methoxyethoxy)silane, γ-(2,3-epoxypropoxy)propyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, and N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane.

[0054] The aforementioned silane coupling agents (such as γ-methacryloyloxypropyltrimethoxysilane) can form silicon-oxygen bonds on the glass surface and chemically bond with EVA, thereby improving interfacial adhesion.

[0055] In some embodiments, the photoinitiator is selected from at least one of 1-hydroxycyclohexylphenyl ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, photoinitiator TPO, and 4-phenylbenzophenone.

[0056] Photoinitiators that are mixed with α-hydroxy ketones (such as 1-hydroxycyclohexylphenyl ketone) and other photosensitive substances have good photosensitive reaction efficiency and curing depth.

[0057] In some embodiments, the photoinitiator is a mixed photoinitiator composed of 1-hydroxycyclohexylphenyl ketone and 2-hydroxy-2-methyl-1-phenyl-1-propanone in a mass ratio of 2:1.

[0058] In some embodiments, the transmittance of the SCA optical adhesive layer 2 is ≥95%.

[0059] Light transmittance is the ability of the optical adhesive layer to transmit light from the display module to the outside of the cover plate 1. The higher the light transmittance, the clearer the visual image. By controlling the light transmittance to below 95%, light loss is reduced, brightness and clarity are improved, and problems such as image blurring and color deviation are improved, making the product particularly suitable for high-resolution display requirements, such as high-definition video, animation, and image editing.

[0060] In some embodiments, the viscosity of the SCA optical adhesive layer 2 is between 1000 cps and 3000 cps. For example, it can be 1000 cps, 2000 cps, 3000 cps, etc. This range ensures that the SCA has both good flowability and stable positioning in the vacuum bonding process, avoiding misalignment or air bubble residue caused by excessively rapid adhesive flow, thereby ensuring that the bonding interface is free of air bubbles and displacement, and improving the consistency of the product.

[0061] In some embodiments, the UV curing wavelength of the SCA optical adhesive layer 2 is 365nm~405nm, and the curing time is less than 15 seconds; for example, the wavelength can be 365nm, 368nm, 370nm, 380nm, 390nm, 400nm, 405nm, etc.

[0062] The UV curing parameters are matched with commonly used industrial UV light sources, which can quickly form a cross-linked structure, thereby improving production efficiency, reducing the risk of thermal curing, and ensuring structural stability and no deformation.

[0063] The chromaticity is X 0.3394~0.3548, Y 0.3725~0.3544. In some embodiments, the high color gamut display module 5 includes phosphor and silicone; in some embodiments, the phosphor includes 0.7 parts to 1.3 parts of yellow-green phosphor (e.g., the weight percentage can be 0.7, 0.8, 0.9, 1.0, 1.2, 1.3, etc.), 0.2 parts to 1.0 parts of yellow phosphor (e.g., the weight percentage can be 0.2, 0.5, 0.8, 1.0, etc.), and 0.06 parts to 0.15 parts of orange-red phosphor (e.g., the weight percentage can be 0.06, 0.08, 0.11, 0.13, 0.15, etc.), and no more than 10% of red phosphor; the above combination of yellow-green phosphor, yellow phosphor, orange-red phosphor, and red phosphor constitutes a broadband emission source covering the red, green, and blue light regions.

[0064] This application constructs a specific spectral compensation system by precisely proportioning yellow-green powder (0.7~1.3 parts), yellow powder (0.2~1.0 parts), and orange-red powder (0.06~0.15 parts). The principle is as follows: using a blue LED chip as the excitation source, the synergistic effect of the yellow-green and yellow powders broadens the half-width of the green band, enhancing the richness of mid-tones; the orange-red powder precisely compensates for the spectral gap in the 620nm-650nm band of traditional YAG light sources. This proportion significantly improves the spectral purity of the three primary colors (red, green, and blue) (narrower FWHM), thereby increasing the NTSC color gamut coverage of the display module from the conventional 70% to over 85%~95%, fundamentally solving the problem of dull colors under fully laminated structures.

[0065] In some embodiments, the silicone includes 1.2 to 1.5 parts by weight of component A (e.g., 1.2, 1.3, 1.4, 1.5, etc.) and 5.0 to 6.0 parts by weight of component B (e.g., 4.0, 5.1, 5.2, 5.3, 5.5, 5.7, 5.9, 6.0, etc.); in some embodiments, the mass ratio of the phosphor to the silicone is (0.05 to 0.12):1; for example, the mass ratio can be 0.05:1, 0.08:1, 0.10:1, 0.11:1, 0.12:1, etc.

[0066] The ratio of A to B adhesives is carefully controlled to ensure uniform dispersion of phosphors, providing good thermal stability and mechanical protection. A mass ratio of (0.05~0.12):1 ensures balanced luminous intensity and prevents color shift. This results in a high color gamut LED module, achieving rich, vibrant, and finely detailed color displays.

[0067] In some implementations, combined Figure 3 As shown, Figure 3 This is a cross-sectional structural diagram of the cover plate in the fully laminated touch screen assembly provided in this application embodiment. The cover plate 1 includes an AF layer 11, an AR layer 12, an AG layer 13, a glass layer 14, and a silkscreen layer 15 arranged sequentially.

[0068] In some embodiments, the thickness of the AF layer 11 is 2nm to 10nm (e.g., the thickness can be 2nm, 3nm, 4nm, 5nm, 6nm, 7nm, 8nm, 9nm, 10nm, etc.); in some embodiments, the thickness of the AR layer 12 is 0.06mm to 0.17mm (e.g., the thickness can be 0.06nm, 0.08nm, 0.09nm, 0.10nm, 0.12nm, 0.04nm, 0.17nm, etc.); in some embodiments, the thickness of the AG layer 13 is 0.05mm to 0.2mm (e.g., the thickness can be 0.05mm, 0.08mm, 0.10mm, 0.13mm, 0.15mm, 0.18mm, 0.20mm, etc.).

[0069] In some embodiments, the cover plate 1 has a thickness of 0.4 mm to 6.0 mm; for example, the thickness can be 0.4 mm, 0.5 mm, 0.6 mm, etc.

[0070] In some embodiments, the thickness of the SCA optical adhesive layer 2 is 0.15mm to 0.3mm; for example, the thickness can be 0.15mm, 0.18mm, 0.20mm, 0.25mm, 0.30mm, etc.

[0071] In some embodiments, the thickness of the high color gamut display module 5 is 2.0mm to 3.0mm. For example, the thickness can be 2.0mm, 2.1mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3.0mm, etc.

[0072] In some embodiments, the fully laminated touch screen assembly 100 further includes a sensor functional sheet 3 and an OCA adhesive 4 disposed sequentially between the SCA optical adhesive layer 2 and the high color gamut display module 5.

[0073] In some implementations, such as Figure 2 As shown, the fully laminated touchscreen assembly 100 further includes a sensor functional sheet 3 and an OCA adhesive 4 sequentially disposed between the SCA optical adhesive layer 2 and the high color gamut display module 5. Based on the aforementioned structure, the sensor functional sheet 3 and the OCA adhesive 4 layer are introduced, which are disposed between the SCA optical adhesive layer 2 and the high color gamut display module 5, thereby forming the following stacked structure: cover plate 1 (treated with AG / AR / AF) → SCA optical adhesive layer 2 → sensor functional sheet 3 → OCA adhesive 4 layer → high color gamut display module 5.

[0074] As described above, the sensor functional layer can be a capacitive touch sensing layer, located between the cover plate 1 and the display module, capable of recognizing finger or stylus operations. It enhances touch recognition sensitivity; provides multi-touch, capacitance detection, and pressure recognition functions; and is modularly integrated as an independent component, facilitating maintenance and replacement. Compared to traditional module-integrated sensors, it offers greater flexibility and avoids the problem of affecting color display uniformity caused by direct embedding into the module.

[0075] The aforementioned OCA is an optically transparent pressure-sensitive adhesive used to bond the sensor functional sheet 3 to the display module.

[0076] Furthermore, the thickness of the cover plate 1 is 0.4mm to 6.0mm; for example, the thickness can be 0.4mm, 0.5mm, 0.6mm, etc.

[0077] Furthermore, the thickness of the SCA optical adhesive layer 2 is 0.15mm to 0.3mm; for example, the thickness can be 0.15mm, 0.18mm, 0.20mm, 0.25mm, 0.30mm, etc.

[0078] Furthermore, the thickness of the sensor functional chip 3 is 0.55mm to 1.1mm; for example, it can be 0.55mm, 0.60mm, 0.80mm, 0.90mm, 1.00mm, 1.10mm, etc.

[0079] Furthermore, the thickness of the OCA adhesive 4 is 0.2mm to 0.3mm; for example, it can be 0.20mm, 0.21mm, 0.22mm, 0.25mm, 0.28mm, 0.29mm, 0.30mm, etc.

[0080] Furthermore, the thickness of the high color gamut display module 5 is 2.0mm to 4.0mm. For example, the thickness can be 2.0mm, 2.1mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3.0mm, 3.5mm, 4.0mm, etc.

[0081] In an optional embodiment, the high color gamut display module 5 includes a module frame, and a light source and an optical film assembly 64 disposed within the module frame; the optical film assembly 64 includes a reflective sheet 55, a light guide plate 56, and a diffuser 58 stacked sequentially, as well as a brightness enhancement film (i.e., Figure 7 , Figure 9 (The prism sheet marked 541). Figure 9 As shown, the optical film group 64 is arranged in a stacked structure.

[0082] In addition, combined Figure 5 and Figure 6As shown, blocks 53 are also provided at both ends of the PCB board 51 or at the structural edges of the high color gamut display module 5. The blocks 53 are fixedly connected to the PCB board 51 and are used to physically limit the components inside the high color gamut display module 5 to prevent horizontal displacement of the optical components during the full lamination process or product use.

[0083] The aforementioned module frame serves as the basic framework for fixing and supporting other components, ensuring the stability of the internal optical structure.

[0084] Furthermore, the reflective sheet 55 is made of PET and has a thickness of 0.5mm.

[0085] The aforementioned reflective sheet 55, disposed at the lower part of the light guide plate 56, primarily functions to reflect the light source below the light guide plate 56. Utilizing the principle of diffuse reflection, it increases light utilization, effectively reflecting and scattering the light onto the diffuser sheet 58 of the backlight module, thereby improving overall visual brightness. Preferably, the reflective sheet 55 is made of PET. Preferably, the thickness of the reflective sheet 55 is 0.5 mm.

[0086] Furthermore, the light guide plate 56 is made of PMMA and has a thickness of 2.0 mm.

[0087] The light guide plate 56 described above primarily functions to convert light emitted from a light source (e.g., a side light source) into a front-facing surface light source, thus providing uniform light diffusion. The light emitted from the light source is refracted internally by the light guide plate 56, with most of the light rays being guided and refracted to the front, thereby providing a uniform backlight for the display device. Preferably, the light guide plate 56 is made of PMMA. Preferably, the thickness of the light guide plate 56 is 2.0 mm.

[0088] Furthermore, the diffuser sheet 58 is made of PET, has a thickness of 1.0 mm, and a transmittance of 40%.

[0089] The aforementioned diffuser 58 is disposed on the light-emitting side of the light guide plate 56. Together, they optimize the light emission, further scattering the light and blurring the underlying optical pattern, resulting in more uniform and softer emitted light. Preferably, the diffuser 58 is made of PET. Preferably, the thickness of the diffuser 58 is 1.0 mm. Preferably, the transmittance of the diffuser 58 is 40%. This 40% transmittance ensures that while effectively scattering and concealing light spots, the required high display brightness is maintained.

[0090] Furthermore, the brightness enhancement film (i.e., as...) Figure 7 The prism sheet marked 541 uses a high refractive index material (such as PET) and utilizes the principle of total internal reflection and refraction of light to maximize the light output efficiency of the backlight module and concentrate the light to a specific direction.

[0091] In an optional implementation, the high color gamut display module 5 is an edge-lit backlight structure or a direct-lit backlight structure.

[0092] (1) When the high color gamut display module 5 is a side-lit backlight structure, combined with the attached Figure 7 As shown, the light source is specifically represented by a lamp tube 62 composed of an LED array, positioned on the light-incident side of the light guide plate 56. A light source reflector 61 is also provided around the lamp tube 62. The reflector 61 has a U-shaped or arc-shaped opening structure and is used to reflect the backlight emitted by the lamp tube 62 back onto the light-incident surface of the light guide plate 56. At this time, the light guide plate 56 is provided with dimming dots 57, which are densely arranged on the side away from the light source, exhibiting a gradient decreasing pattern.

[0093] When the high color gamut display module 5 is a side-lit backlight structure, combined with the attached Figure 5 and attached Figure 7 As shown, the light source is typically positioned at the side edge of the light guide plate 56. The light guide plate 56 has dimming dots 57, which are densely arranged on the side furthest from the light source (far-light side) and sparsely arranged on the side closest to the light source (near-light side), exhibiting a gradient decreasing pattern. This structure, through the variation in dot density, reflects more side-incident light to the far-light side, thereby compensating for the natural attenuation of light during propagation. Its advantages include a thin and lightweight structure, and the ability to achieve extremely excellent uniform dimming effect, ensuring the overall brightness uniformity of the display panel.

[0094] (2) When the high color gamut display module 5 is a direct-lit backlight structure, the light guide plate 56 is provided with dimming dots 57, and the dimming dots 57 correspond one-to-one with the light source below, and are evenly distributed in a regular matrix.

[0095] When the high color gamut display module 5 has a direct-lit backlight structure, combined with the attached Figure 6 and attached Figure 8 As shown, the light source array is laid flat below the light guide plate 56. The light guide plate 56 has dimming dots 57, which correspond one-to-one with the light sources below, forming a regular matrix distribution. In this structure, each dot corresponds to an independent light source area, with light emitted perpendicularly. This one-to-one arrangement allows for independent control of the brightness of local light sources, achieving precise zone dimming. This design significantly improves image contrast, making black areas in the displayed image purer and greatly enhancing the image's depth and detail.

[0096] In an optional embodiment, the light source is an LED lamp bead 52.

[0097] Combination Figure 5 , Figure 6 As shown in Appendix 9, the light source includes a PCB board 51 and multiple LED beads 52 (52) periodically arranged on the PCB board 51 (51). To achieve electrical connection, the PCB board 51 (51) has corresponding circuit traces, with a positive electrode 59 and a negative electrode 60 (see Appendix 9). Figure 5 (A close-up view at the bottom) is used to connect an external drive power supply.

[0098] The operating parameters of the LED bead 52 satisfy at least one of the following conditions: A. The operating current is 58mA~61mA; for example, it can be 58mA, 58.2mA, 58.5mA, 59mA, 59.5mA, 60mA, 60.5mA, 60.8mA, 61mA, etc.

[0099] B. Forward voltage is 2.6V~2.9V; for example, it can be 2.6V, 2.62V, 2.65V, 2.7V, 2.75V, 2.8V, 2.85V, 2.88V, 2.9V, etc.

[0100] C. Power is 160mW~170mW; for example, it can be 160mW, 161mW, 162mW, 164mW, 165mW, 166mW, 168mW, 169mW, 170mW, etc.

[0101] D. Luminous flux is 25lm~32lm; for example, it can be 25lm, 26lm, 27lm, 28lm, 28.5lm, 29lm, 30lm, 31lm, 32lm, etc.

[0102] E. Luminous efficacy is 150lm / W~185lm / W; for example, it can be 150lm / W, 155lm / W, 160lm / W, 165lm / W, 170lm / W, 175lm / W, 180lm / W, 182lm / W, 185lm / W, etc.

[0103] F. The color rendering index Ra is 75~90; for example, it can be 75, 78, 80, 82, 85, 86, 88, 89, 90, etc.

[0104] G. Color temperature TC is 6020K~7600K; for example, it can be 6020K, 6200K, 6400K, 6600K, 6800K, 7000K, 7200K, 7400K, 7600K, etc.

[0105] H. The main wavelength is 320nm~480nm; for example, it can be 320nm, 340nm, 360nm, 380nm, 400nm, 420nm, 440nm, 460nm, 480nm, etc.

[0106] I. Peak wavelength is 430nm~480nm; for example, it can be 430nm, 435nm, 440nm, 445nm, 450nm, 460nm, 470nm, 475nm, 480nm, etc.

[0107] The aforementioned high-power, high-luminous-flux, high-color-rendering-index, and specific-spectral-band LED beads 52 can provide a backlight source with excellent light efficiency and rich colors for the touch screen assembly.

[0108] Furthermore, when the high color gamut display module 5 has a direct-lit backlight structure, a glass lens 63 is also provided on the LED beads 52.

[0109] The glass lens 63 is positioned above the LED chip and serves multiple beneficial functions: First, it focuses the light by refraction, concentrating the scattered light from the LED chip to improve light intensity and directionality; second, it controls the light pattern, allowing the light to form a specific shape or be more evenly distributed; third, it improves luminous efficiency, as the high transmittance of the glass lens 63 reduces light propagation loss; finally, the lens also protects the fragile LED chip from external impacts and assists in heat dissipation, further improving the reliability and lifespan of the LED lamp.

[0110] Please see Figure 4 , Figure 4 This is a flowchart illustrating the fabrication method of the fully laminated touchscreen assembly provided in this application embodiment. This application embodiment provides a method for fabricating the fully laminated touchscreen assembly 100 as described in any of the foregoing embodiments, comprising: Step S1: Perform surface treatment on the cover plate 1 to obtain the surface-treated cover plate 1; the surface treatment includes anti-glare treatment, anti-reflection treatment and anti-fingerprint treatment.

[0111] In the above preparation method, the cover plate 1 is first surface treated to give it anti-glare (AG), anti-fingerprint (AF) and anti-reflection (AR) functions.

[0112] Specifically, AG treatment creates a fine textured surface on the glass by chemical etching or sandblasting to reduce ambient light reflection; AR treatment achieves light wave interference by depositing multiple thin films on the glass surface, thereby reducing visible light reflectivity and enhancing screen clarity and display transparency; AF treatment coats the glass surface with a low surface energy material to reduce fingerprint residue and oil adhesion, improving ease of cleaning and visual comfort during use.

[0113] Step S2: The surface-treated cover plate 1, SCA optical adhesive layer 2 and high color gamut display module 5 are sequentially bonded together to obtain a gapless fully bonded touch screen assembly 100.

[0114] After completing the surface treatment in step S1, the treated cover plate 1 can be bonded to the SCA optical adhesive layer 2. In practice, the SCA and cover plate 1 can be pre-bonded and rapidly cured by UV light irradiation to form a stable adhesive structure between the SCA layer and cover plate 1. This step is generally completed in a vacuum laminator to avoid air bubble inclusions. Subsequently, this structure is bonded to the high color gamut display module 5. The bonding process is also carried out in a vacuum environment, and residual gas is removed through degassing treatment (e.g., maintaining a temperature of 50–60°C and a pressure of over 0.6 MPa for about 30 minutes) to ensure an air gap-free interface and guarantee display clarity and bonding stability.

[0115] The SCA optical adhesive used in the overall bonding process has excellent light transmittance and UV curing performance, enabling rapid bonding in a short time. It also has good flexibility and adhesion, meeting the process requirements of multi-layer bonding structures. The high color gamut display module 5 improves color gamut coverage and display saturation by using a specific ratio of phosphor and silicone materials. Combined with optimized structural layer thickness, it achieves an overall improvement in visual effect.

[0116] Therefore, this preparation method, through reasonable process sequence and interface control measures, constructs a fully laminated touch screen assembly 100 with dense structure, high bonding accuracy, and excellent display performance.

[0117] In some embodiments, before or during the process intervals of performing the above-mentioned anti-glare, anti-reflection, and anti-fingerprint treatments on the cover plate 1, the steps of CNC machining, tempering, and screen printing on the cover plate 1 are also included.

[0118] Specifically, the CNC machining of the outer shape uses a high-speed spindle (e.g., 1.2KW or 1.8KW), with the roughing speed controlled at around 2800mm / min and the finishing speed controlled at around 3000mm / min. The tolerance is controlled between 0.005mm and 0.01mm, and the edge chipping does not exceed 0.1mm, so as to ensure that the perimeter is smooth and does not affect the subsequent optical processing effect.

[0119] The tempering process includes: preheating at 360℃±20℃ and holding at that temperature for 50 minutes, then placing the glass in a tempering furnace and performing potassium-sodium ion exchange at 380℃~430℃ for 4 hours. After cooling, the glass is immersed in warm water at 40℃~50℃ to remove surface deposits. This tempering process with a specific temperature gradient can effectively prevent the glass from cracking and significantly improve surface hardness and scratch resistance.

[0120] The screen printing process employs multiple screen printing steps, for example, the first step uses a 165T screen (controlling the ink thickness to 5~7μm), and the subsequent steps use a 150T screen (controlling the ink thickness to 6~8μm), and are baked at 150℃~160℃ to form light-shielding edges and enhance adhesion to the subsequent adhesive layer.

[0121] In an optional implementation, step S1, the anti-glare treatment, includes: Step S11: Clean the cover plate 1; Step S12: The surface of the cleaned cover plate 1 is etched with hydrofluoric acid solution, and the etched cover plate 1 is subjected to multi-segment sanding treatment. Step S13: The cover plate 1 after sanding is washed, polished and dried to form AF layer 11.

[0122] The purpose of the anti-glare treatment method is to perform structural and chemical modifications on the surface of the cover plate 1 to reduce light reflection and improve the readability and comfort of the touch screen in strong light environments.

[0123] The process begins with cleaning the cover plate 1 to remove surface oil, dust, and other impurities, ensuring the uniformity and effectiveness of subsequent etching and frosting processes. The cleaning agent can be a compound cleaning solution, such as an alkaline cleaning system composed of organic components like ethylene glycol monobutyl ether, propanol, nonionic surfactants, and nonylphenol polyoxyethylene ether, or fatty alcohol polyoxyethylene ether, ammonia, and vinyl ether. Both types are mixed with an appropriate amount of water.

[0124] After cleaning, the surface of the cover plate 1 is etched with hydrofluoric acid solution. The etching effect of HF on SiO2 in the glass introduces surface roughness at the microscopic level. The preferred volume ratio of hydrofluoric acid solution is 1:(10~20), which can control the etching depth while ensuring etching efficiency and avoiding damage to the glass substrate.

[0125] Next, a multi-stage frosting treatment is applied to the surface of the etched cover plate 1. This step uses a composite chemical frosting solution to further etch the glass, forming a fine and uniform diffuse reflection microstructure, thereby scattering the incident light and reducing glare. The frosting agent used is a multi-component system, specifically including ammonium bifluoride, ammonium fluorosilicate, hydrochloric acid, citric acid, calcium fluoride, water, and viscosity modifiers, to achieve comprehensive control over the etching rate, etching morphology, and solution rheological properties, ensuring the fineness and consistency of the frosting effect. The preferred thickness of the AG layer 13 is 0.05mm~0.2mm, ensuring good extinction performance without affecting optical clarity.

[0126] Finally, the frosted cover plate 1 is washed, polished and dried to remove residual liquid and impurity particles, and an AF (anti-fingerprint) layer is formed through appropriate surface treatment to improve the oleophobicity and anti-fouling ability of the cover plate 1, providing a clean and stable surface state for subsequent bonding steps.

[0127] Overall, this anti-glare treatment method constructs a microstructured surface with diffuse reflection characteristics through multi-stage refined chemical processing, which significantly reduces glare interference caused by direct reflection of ambient light, effectively improves the display effect of the touch screen in outdoor or strong light environments, and also takes into account the touch smoothness and compatibility with subsequent processes.

[0128] The AG layer 13 formed by the above treatment has a surface roughness controlled between 0.05 and 0.8, a gloss level of less than 110, a haze level of less than 80, and an overall transmittance of more than 89%, achieving an excellent balance between anti-glare and high light transmittance.

[0129] In some embodiments, the volume ratio of the hydrofluoric acid solution is 1:(10~20); for example, it can be 1:10, 1:15, 1:20, etc.

[0130] In some embodiments, the thickness of the AG layer 13 is 0.05mm to 0.2mm; for example, it can be 0.05mm, 0.08mm, 0.10mm, 0.15mm, 0.20mm, etc.

[0131] In some embodiments, the frosting agent used in the multi-stage frosting treatment comprises the following components in parts by weight: Ammonium bifluoride 20~30; for example, the weight percentage can be 20, 22, 24, 26, 28, 30, etc.

[0132] Ammonium fluorosilicate 5~10; for example, the weight parts can be 5, 6, 7, 8, 9, 10, etc.

[0133] Hydrochloric acid 0~10; for example, the weight parts can be 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, etc.

[0134] Citric acid 5~10; for example, the weight percentage can be 5, 6, 7, 8, 9, 10, etc.

[0135] Ammonium fluorosilicate 2~8; for example, the weight parts can be 2, 3, 4, 5, 6, 7, 8, etc.

[0136] Calcium fluoride 10~20; for example, the weight percentage can be 10, 12, 14, 16, 18, 20, etc.

[0137] Water 20-25; for example, the weight percentage can be 20, 21, 22, 23, 24, 25, etc.

[0138] Viscosity modifier 2-4 parts; for example, the weight percentage can be 2, 3, 4, etc.

[0139] In some embodiments, the cleaning agent used in the cleaning process includes: 5% ethylene glycol monobutyl ether, 0.3% additive, 12% propanol, 0.8% nonylphenol polyoxyethylene ether, 0.3% nonionic surfactant, and the balance being water.

[0140] In other embodiments, the cleaning agent used in the cleaning process includes: 0.30% fatty alcohol polyoxygen, 2.5% ammonia (28%), 3% vinyl ether, 0.01% to 3% fragrance, and the balance being water.

[0141] In some embodiments, the anti-reflection treatment in step S1 includes: Step S14: In a vacuum environment, an antireflective membrane material is deposited on the surface of the cover plate 1 using a physical vapor deposition process to form a deposited film layer.

[0142] In some embodiments, the deposition temperature is 250°C to 450°C; for example, the temperature can be 250°C, 300°C, 350°C, 400°C, 450°C, etc.

[0143] In some embodiments, the operating pressure of sputtering deposition during the deposition process is 10. -2 Pa~10Pa; for example, the working pressure can be 10 Pa. -2 Pa, 10 -1 Pa, 10 Pa, etc.

[0144] In some implementations, the working pressure of ion plating during the deposition process is 10. -5 Pa~10 -6 Pa; for example, the working pressure can be 10. -5 Pa, 10 -5.5 Pa, 10 -6 Pa, etc.

[0145] In some embodiments, the deposition rate of the sputtered film during the deposition process is 0.01 μm / min to 0.5 μm / min. For example, the deposition rate can be 0.01 μm / min, 0.05 μm / min, 0.1 μm / min, 0.2 μm / min, 0.3 μm / min, 0.4 μm / min, 0.5 μm / min, etc.

[0146] In some embodiments, the deposition rate of ion plating during the deposition process is 0.1 μm / min to 50 μm / min. For example, the deposition rate can be 0.1 μm / min, 0.5 μm / min, 1 μm / min, 5 μm / min, 10 μm / min, 20 μm / min, 30 μm / min, 40 μm / min, 50 μm / min, etc.

[0147] Step S15: Cool and solidify the film layer to form AR layer 12; The core of the anti-reflection treatment method lies in forming a thin film layer (AR layer 12) with anti-reflective properties on the surface of the cover plate 1 through physical vapor deposition (PVD) process, so as to reduce the reflection phenomenon on the surface of the touch screen and improve the clarity and visibility of the displayed image.

[0148] Specifically, the method is first carried out in a vacuum environment to avoid impurity interference and ensure the density and uniformity of the film. During the deposition process, by selecting appropriate antireflective coating materials (such as silicon oxide, aluminum oxide, etc.) for sputtering or ion plating, material atoms or ions are deposited on the surface of the glass cover plate 1, building a film structure with optical interference effects layer by layer. The formed AR layer 12 minimizes the reflection of visible light by controlling the film thickness and refractive index, thereby improving the overall light transmittance and display transparency.

[0149] Regarding specific parameters, the deposition temperature of the sputtered coating is preferably controlled between 250℃ and 450℃ to ensure good adhesion between the coating and the glass substrate without affecting the substrate structure; during the sputtering process, the working pressure is preferably 10. - The working pressure is controlled at a higher vacuum level of 10 Pa~10 Pa, while the working pressure of the ion plating process is controlled at a higher vacuum level of 10 Pa. -5 Pa~10 -6 Within the Pa range, a film structure with higher purity and adhesion is obtained; the corresponding deposition rates are controlled at 0.01 μm / min~0.5 μm / min (sputtering) and 0.1 μm / min~50 μm / min (ion plating), respectively, balancing film formation efficiency and film quality. After deposition, the formed film needs to be cooled and cured to make it structurally stable and have long-term anti-reflection function.

[0150] Through the above process, the resulting AR layer 12 possesses excellent optical performance, significantly reducing ambient light interference and improving screen brightness and color accuracy. It is particularly suitable for touchscreen applications under strong sunlight conditions, effectively improving the user viewing experience. It also provides a clean and stable interface for subsequent layer bonding. This process is adaptable to cover plate 1 materials of different thicknesses and surface treatment requirements, exhibiting good process compatibility and mass production feasibility.

[0151] The AR layer 12 formed by the above process has a transmittance of 94%~96% and excellent wear resistance. For example, it can withstand 1500 rubs with a 0000# steel wool ball under a pressure of 1KGF without wear.

[0152] In some embodiments, step S1, the anti-fingerprint processing, includes: In step S16, the cover plate 1 is cleaned and then fixed on the platform of the vacuum evaporation coating equipment.

[0153] As clearly stated above, the cover plate 1 needs to be thoroughly cleaned to remove dust, oil, organic residues, and other impurities adhering to its surface. This step provides a clean substrate for subsequent coating, preventing contaminants from affecting coating adhesion and film uniformity. This step can be consistent with the aforementioned cleaning process, using a compound cleaning agent containing various organic solvents and surfactants.

[0154] The cleaned cover plate 1 is placed on the stage inside the vacuum evaporation coating equipment and fixed to maintain a stable position and uniform film deposition. The vacuum environment helps reduce interference from airborne impurities, improving the quality and density of the film during the coating process.

[0155] In step S17, under vacuum conditions, the evaporation source is started to deposit an AF layer 11 containing SiO2 on the surface of the cover plate 1.

[0156] After the evaporation source is activated, the SiO2-containing material is vaporized and deposited on the surface of the cover plate 1 through thermal evaporation or electron beam evaporation, forming a dense and uniform AF (Anti-Fingerprint) layer. This layer is usually a nanometer-thick siloxane coating with strong hydrophobic and oleophobic properties, which can significantly reduce the adhesion of water stains, fingerprints, and grease to the screen.

[0157] The SiO2-based vapor deposition materials used have good compatibility with substrates such as glass and have high film stability. Vacuum evaporation deposition is conducive to forming a highly uniform anti-fingerprint layer, avoiding problems such as uneven coating or peeling during manual application. The SiO2-based anti-fingerprint coating has good chemical inertness and wear resistance, and can withstand repeated wiping in daily use. In addition, this process is suitable for integration into panel production lines, with good controllability and automation.

[0158] This anti-fingerprint technology can significantly reduce problems such as blurred display, increased glare, and visual fatigue caused by fingerprint residue during touchscreen use. It also enhances the touch feel and screen cleaning convenience, thereby improving overall product quality and end-user satisfaction.

[0159] In summary, this embodiment provides an efficient and feasible technical path for anti-fingerprint processing of cover plate 1, which is particularly suitable for high-end touch screen products with high requirements for screen surface cleanliness and touch feel.

[0160] The deposited AF layer 11 has extremely low surface energy, and its water droplet angle before grinding can reach more than 115°. After friction testing, the film thickness and water droplet angle still remain above 100° (e.g., 5000 times of pressure friction with a 0000# steel wool ball at 1KGF). It has super hydrophobic, oil-resistant and fingerprint-resistant capabilities.

[0161] Further, step S2 involves sequentially bonding the surface-treated cover plate 1, SCA optical adhesive layer 2, and high color gamut display module 5, including: Step S21: In a vacuum environment, the cover plate 1 is bonded to the SCA adhesive, and then subjected to a first vacuum degassing treatment and UV curing treatment to obtain a bonded structure with the SCA optical adhesive layer 2.

[0162] As mentioned above, bonding in a vacuum environment can effectively prevent the formation of air bubbles.

[0163] Air bubbles can degrade optical performance, affecting display quality and even bonding strength. The surface-treated cover plate 1 and the SCA optical adhesive layer 2 can be bonded in a vacuum environment, ensuring no air residue remains between them. Vacuum bonding achieves a gapless bond, improving both optical performance and bonding strength.

[0164] The first vacuum degassing process is used to further remove any tiny air bubbles that may remain between the cover plate 1 and the SCA optical adhesive layer 2, ensuring the tightness of the bonding structure and its optical performance.

[0165] In some embodiments, the temperature of the first vacuum degassing treatment is 50°C to 60°C; for example, it can be 50°C, 53°C, 55°C, 57°C, 60°C, etc. This temperature range can ensure the flowability of the SCA optical adhesive layer 2 without causing thermal damage to the cover plate 1.

[0166] In some embodiments, the first vacuum degassing treatment lasts for at least 30 minutes to ensure sufficient processing time for complete removal of bubbles.

[0167] In some embodiments, the first vacuum degassing treatment is carried out under a pressure of not less than 0.6 MPa, and higher pressure can remove bubbles more effectively.

[0168] The aforementioned UV curing treatment cures the SCA optical adhesive layer 2, forming a stable adhesive layer and ensuring the bonding strength between the cover plate 1 and the SCA optical adhesive layer 2. In terms of operation, the UV curing wavelength can be in the range of 365nm to 405nm. This wavelength range can effectively activate the photoinitiator in the SCA optical adhesive layer 2, initiating a polymerization reaction. The curing time can be less than 15 seconds, and rapid curing can improve production efficiency. The UV-cured SCA optical adhesive layer 2 exhibits high light transmittance, high adhesive strength, and good weather resistance.

[0169] Step S22: The SCA optical adhesive layer 2 in the bonding structure is bonded to the high color gamut display module 5 on the side away from the cover plate 1, and then subjected to a second vacuum degassing process to obtain the fully bonded touch screen assembly 100.

[0170] In this step, the cover plate 1 is bonded to the high color gamut display module 5. The purpose is to bond the treated cover plate 1 to the high color gamut display module 5 to form a complete fully laminated touch screen assembly 100.

[0171] Specifically, the side of the SCA optical adhesive layer 2 away from the cover plate 1 is bonded to the high color gamut display module 5.

[0172] In some embodiments, the temperature of the second vacuum degassing treatment is 50°C to 60°C; for example, it can be 50°C, 53°C, 55°C, 57°C, 60°C, etc.

[0173] In some embodiments, the second vacuum degassing treatment takes 20 to 30 minutes; for example, it can be 20 minutes, 22 minutes, 24 minutes, 26 minutes, 28 minutes, 30 minutes, etc.

[0174] In some embodiments, the second vacuum degassing treatment is carried out under a pressure of not less than 0.6 MPa.

[0175] After the second vacuum degassing process, the SCA optical adhesive layer 2 and the high color gamut display module 5 are more tightly bonded, resulting in better optical and mechanical properties.

[0176] Before performing the full lamination step S22 described above, the assembly process of the high color gamut display module 5 itself is as follows: First, fix the module frame, place the reflector 55 at the bottom of the module frame, align the edges with the slots and fix it, ensuring that the reflective surface is flat and without wrinkles; Next, install the light source and light guide plate 56. For side-emitting designs, fix the light strip to the edge of the module frame; for direct-lit designs, fix the light strip to the bottom. Then, cover the reflector 55 with the light guide plate 56, ensuring it fits into the positioning hole and is free of fingerprints and dust. Next, connect the circuit, connect the light strip connecting wire to the driver power supply and ensure proper insulation protection; Finally, the diffuser sheet 58, light-collecting sheet, and other film materials are sequentially covered, and the lamp cover is placed on top and fixed to the top of the module frame with clips or screws. Power is turned on and the light is observed to check whether the light is uniform and whether there are any dark areas. Only after the module is assembled can it proceed to the subsequent debubbling and full lamination processes.

[0177] The present invention will be further illustrated below with specific embodiments. However, it should be understood that these embodiments are merely for the purpose of more detailed illustration and should not be construed as limiting the present invention in any way.

[0178] Example 1 In this embodiment, the fully laminated touch screen assembly is fabricated using the optimal center value of each parameter.

[0179] Experimental methods: 1. Surface treatment of the cover plate: (1) Anti-glare treatment (AG layer): The glass cover is ultrasonically cleaned using a compound cleaning agent, which contains 5% ethylene glycol monobutyl ether, 12% propanol, 0.8% nonylphenol polyoxyethylene ether, 0.3% nonionic surfactant, 0.3% additives and the balance being water; Chemical etching was performed using hydrofluoric acid solution with a volume ratio of 1:15; frosting solution (containing 25 parts ammonium hydrogen fluoride, 8 parts ammonium fluorosilicate, 8 parts citric acid, 5 parts ammonium fluorosilicate, 15 parts calcium fluoride, 22 parts water, and 3 parts viscosity modifier) ​​was used for glass surface atomization treatment; after cleaning, polishing, and drying, the surface roughness was controlled at 0.4, the haze at 60, and the AG layer thickness at 0.12 mm.

[0180] (2) Anti-reflection treatment (AR layer): sputtering coating process is adopted, temperature 350℃, working pressure 1Pa, deposition rate 0.2μm / min, film thickness 0.12mm.

[0181] (3) Anti-fingerprint treatment (AF layer): A hydrophobic material containing SiO2 is deposited in a vacuum evaporation coating machine with a thickness of 6nm.

[0182] 2. Preparation of SCA optical adhesive material: SCA optical adhesive was prepared by mixing the following parts by weight: 96.5 parts of EVA resin (VA content 28%, melt index 100g / 10min), 0.6 parts of crosslinking agent (tert-butyl peroxide-2-ethylhexanoate), 0.6 parts of silane coupling agent, 0.5 parts of photoinitiator (1-hydroxycyclohexylphenyl ketone and 2-hydroxy-2-methyl-1-phenyl-1-propanone in a mass ratio of 2:1), and 2 parts of microcrystalline wax.

[0183] 3. Preparation of high color gamut display module: A side-lit backlight structure is adopted. The light guide plate has dimming dots, densely arranged on the side away from the light source and sparsely arranged on the side closer to the light source, exhibiting a gradient decrease. The optical film includes a reflective sheet (PET, 0.5mm), a light guide plate (PMMA, 2.0mm), a lower diffuser, a lower light collector, an upper light collector, and an upper diffuser. The light source uses LED chips with an operating current of 60mA, a forward voltage of 2.8V, a power of 165mW, a luminous flux of 28lm, a luminous efficacy of 170lm / W, and a color rendering index Ra of 85. The luminescent material within the LED chips is composed of phosphor and silicone. The specific ratio is as follows: 1.0 part yellow-green phosphor, 0.6 parts yellow phosphor, and 0.1 part orange-red phosphor are mixed evenly to obtain a composite phosphor; 1.3 parts of A adhesive and 5.5 parts of B adhesive are mixed to obtain a silicone matrix; finally, after degassing, the phosphor and silicone are mixed at a mass ratio of 0.1:1 and coated onto the LED chip.

[0184] 4. Layered bonding and curing: The treated cover plate is bonded to the SCA optical adhesive layer in a vacuum environment, and a first vacuum degassing treatment is performed (temperature 55℃, air pressure 0.6MPa, time 25 minutes). Then, it is cured by irradiation with 395nm wavelength UV light for 10 seconds. Next, the cured SCA layer is bonded to the high color gamut module and a second vacuum degassing treatment is performed (temperature 55℃, air pressure 0.6MPa, time 25 minutes) to obtain a fully laminated touch screen assembly.

[0185] Example 2 In this embodiment, the fabrication of a fully laminated touch screen assembly is carried out, mainly to verify the direct-lit backlight structure.

[0186] The experimental method is basically the same as in Example 1, except that in step 3, the high color gamut display module 5 adopts a direct-lit backlight structure. The dimming dots on the light guide plate correspond one-to-one with the LED light source below, and are evenly distributed in a regular matrix. Furthermore, a glass lens is placed above each LED to focus the light and control the light pattern.

[0187] Example 3 In this embodiment, the fabrication of a fully laminated touchscreen assembly is carried out, mainly to verify the upper limit of parameters.

[0188] The experimental method was basically the same as in Example 1, except that in step 2, the SCA adhesive consisted of 95 parts EVA resin, 1 part crosslinking agent, 1 part silane coupling agent, 1 part photoinitiator, and 3 parts microcrystalline wax. In step 3, the LED beads operated at a current of 61 mA, with a power of 170 mW, a luminous flux of 32 lm, and a color rendering index Ra of 90. In step 4, the first and second vacuum degassing temperatures were 60°C for 30 minutes. The phosphor ratio in the LED beads was 1.3 parts yellow-green phosphor, 1.0 part yellow phosphor, and 0.15 parts orange-red phosphor; the silicone ratio was 1.5 parts A glue and 6.0 parts B glue; and the phosphor to silicone mass ratio was 0.12:1.

[0189] Example 4 In this embodiment, the fabrication of a fully laminated touchscreen assembly is carried out, and the lower limit of the main verification parameters is performed.

[0190] The experimental method was basically the same as in Example 1, except that in step 2, the SCA adhesive consisted of 98 parts EVA resin, 0.2 parts crosslinking agent, 0.2 parts silane coupling agent, 0.1 parts photoinitiator, and 1 part microcrystalline wax. In step 3, the LED beads had an operating current of 58 mA, a power of 160 mW, a luminous flux of 25 lm, and a color rendering index Ra of 75. In step 4, the first and second vacuum degassing temperatures were 50°C for 20 minutes. The phosphor ratio in the LED beads was 0.7 parts yellow-green phosphor, 0.2 parts yellow phosphor, and 0.06 parts orange-red phosphor; the silicone ratio was 1.2 parts A glue and 5.0 parts B glue; and the phosphor to silicone mass ratio was 0.05:1.

[0191] Example 5 In this embodiment, the fabrication of a fully laminated touchscreen assembly is carried out, mainly to verify the structure of the additional functional layer.

[0192] The experimental method is basically the same as in Example 1, except that in the second bonding step of step 4, the SCA layer is not directly bonded to the module. Instead, a sensor functional sheet with a thickness of 0.8 mm and a conventional OCA adhesive layer with a thickness of 0.25 mm are placed between the SCA optical adhesive layer and the high color gamut display module, and vacuum bonding and debubbling treatment are performed in sequence.

[0193] Comparative Example 1 In this comparative example, a fully laminated touchscreen assembly was prepared, mainly to compare the performance of the bonding adhesive.

[0194] The experimental method is basically the same as in Example 1, except that the SCA adhesive preparation in step 2 and the UV curing step in step 4 are omitted; during bonding, the SCA optical adhesive layer is replaced with commercially available substrate-free OCA pressure-sensitive adhesive (with the same thickness), and hot pressing and vacuum degassing bonding are performed directly.

[0195] Comparative Example 2 In this comparative example, a fully laminated touchscreen assembly was prepared, mainly for comparing the performance of the display module.

[0196] The experimental method is basically the same as in Example 1, except that the high color gamut display module in step 3 is replaced with a regular LCD display module. The light guide plate of this regular module does not have a specific gradient dimming dot design, and its LED beads are coated with only traditional single YAG yellow phosphor. The selected LED bead parameters are: operating current 20mA, power 55mW, luminous flux 10lm, and color rendering index Ra of 70.

[0197] Comparative Example 3 In this comparative example, the fabrication of a fully laminated touchscreen assembly is mainly used to compare the surface treatment performance of the cover plate.

[0198] The experimental method is basically the same as in Example 1, except that the anti-glare (AG), anti-reflection (AR) and anti-fingerprint (AF) treatments on the cover plate in step 1 are omitted. Ordinary transparent white glass of the same thickness and cleaned directly is used for subsequent SCA coating and module bonding.

[0199] Comparative Example 4 This comparative example provides a touchscreen assembly as a control, whose manufacturing process is completely identical to that of Example 1, except for the different SCA optical adhesive formulation used. The SCA adhesive formulation of Comparative Example 4 does not contain microcrystalline wax, and the EVA resin used is a general-purpose industrial-grade material. This comparative example is used to verify the influence of specific added components on yield and optical performance.

[0200] Test Experiment 1. Testing method: The touch screen assemblies prepared in Examples 1-5 and Comparative Examples 1-3 were subjected to the following performance tests: (1) Optical and Color Performance: Overall transmittance (%) was measured using a spectrophotometer; screen surface reflectance (%) was tested using an integrating sphere reflectometer; and NTSC color gamut coverage (%) under white field was measured using a colorimeter. Simultaneously, color accuracy (ΔE), color saturation (Rg), and the percentage of blue light energy in the spectrum (%) were measured using a color analyzer.

[0201] (2) Physical and mechanical properties: The bonding interface was inspected by machine vision, and the percentage of air bubbles larger than 0.1 mm was counted (reflecting the yield rate); the pure water droplet angle (°) on the screen surface was tested using a contact angle meter (the test conditions were after 3000 cycles of rubbing with 1KGF pressure from a 0000# steel wool ball).

[0202] (3) Visual experience blind test: 20 evaluators were invited to observe the high-definition color gradient test image displayed on the screen under strong light (10000 Lux) environment and score the "visibility under strong light" and "color level / contrast of the picture" (1-10 points, 10 points is excellent) and take the average value.

[0203] 2. Test Results: The test data for each group are summarized in Table 1.

[0204] Table 1 Performance test results of the examples and comparative examples

[0205] 3. Analysis: The following conclusions can be drawn from the comparative analysis of the data in Table 1: (1) Necessity and advantages of specific ratio SCA optical adhesive: Comparison of Example 1 and Comparative Example 1 shows that traditional OCA adhesive is prone to generating micro-bubble dead corners (bubble residue rate up to 1.5%) when bonded to roughened AG glass surfaces; further comparison of Example 1 and Comparative Example 4 shows that if specific components such as microcrystalline wax are lacking in the SCA adhesive formulation, its leveling and gap filling performance will be greatly reduced, and the bubble residue rate will increase sharply to 3.5%. This application uses a specific ratio of flowable SCA optical adhesive, which is rapidly cured by UV after degassing, and can perfectly fill the AG microstructure, reducing the bubble rate to 0.2% and the light transmittance to 95.8%, greatly improving the bonding yield and optical transparency.

[0206] (2) Significant technical effects of high color gamut modules: Comparing Example 1 and Comparative Example 2, it can be seen that Comparative Example 2, which uses a common module, not only has a lower image contrast score (7.5 points), but also has an NTSC color gamut coverage of only 70.5% and a blue light proportion as high as 26.5%. In contrast, Examples 1 and 2 use customized light sources with specific ratios of composite phosphors and dimming dots, which makes the NTSC color gamut jump to 91%~93%, the color saturation Rg as high as 104 or more, and the color accuracy ΔE reduced to an extremely high level of 1.8~1.9. At the same time, the blue light energy proportion is significantly reduced to 18.5%~19%. In addition, the direct-lit structure can better achieve light path management, and its image contrast score is as high as 9.3 points or more, which completely solves the problem of dull colors under the fully laminated structure.

[0207] (3) Synergistic effect of composite treatment on cover surface: Comparing Example 1 and Comparative Example 3, it can be seen that without AG / AR / AF treatment (i.e., the bare glass of Comparative Example 3), the screen surface reflectivity is as high as 8.5%, the strong light visibility score drops to 5.5 points (severe reflection under strong light), and the water droplet angle is only 75° after extremely strong friction (very easy to get fingerprints and oil stains). The triple treatment of this application reduces the reflectivity to 1.2%, and still maintains hydrophobicity and oleophobicity of more than 110° after extremely strong friction, effectively protecting the user's visual health and touch hygiene.

[0208] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fully laminated touchscreen assembly, characterized in that, The fully laminated touchscreen assembly consists of a cover plate treated with anti-glare, anti-fingerprint and anti-reflection, a light-transmitting and UV-curable SCA optical adhesive layer, and a high color gamut display module, all laminated together in sequence.

2. The fully laminated touchscreen assembly as described in claim 1, characterized in that, The SCA optical adhesive layer comprises the following components in parts by weight: EVA resin 95-98; Crosslinking agent 0.2-1; Coupling agent 0.2–1; Photoinitiator 0.1–1; Microcrystalline wax 1-3; Preferably, the EVA resin comprises vinyl acetate at a mass percentage of 5% to 40%; Preferably, the melt flow index of the EVA resin is 10 g / 10 min to 400 g / 10 min; Preferably, the crosslinking agent is selected from at least one of tert-butyl peroxide-2-ethylhexanoate, 1,1-di-tert-butyl peroxide-3,3,5-trimethylcyclohexane, 2,5-dimethyl-2,5-di-tert-butyl peroxide, tert-amyl peroxide (2-ethylhexyl) carbonate, and tert-butyl peroxide-2-ethylhexyl carbonate. Preferably, the coupling agent is a silane coupling agent; Preferably, the coupling agent is selected from at least one of vinyltris(methoxyethoxy)silane, γ-(2,3-epoxypropoxy)propyltrimethoxysilane, γ-methacryloyloxypropyltrimethoxysilane, N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, and N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane; Preferably, the photoinitiator is selected from at least one of 1-hydroxycyclohexylphenyl ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, photoinitiator TPO, and 4-phenylbenzophenone; Preferably, the photoinitiator is a mixed photoinitiator composed of 1-hydroxycyclohexylphenyl ketone and 2-hydroxy-2-methyl-1-phenyl-1-propanone in a mass ratio of 2:

1.

3. The fully laminated touchscreen assembly as described in claim 1, characterized in that, The light transmittance of the SCA optical adhesive layer is ≥95%; and / or, The viscosity of the SCA optical adhesive layer is between 1000 cps and 3000 cps; and / or, The UV curing wavelength of the SCA optical adhesive layer is 365nm~405nm, and the curing time is less than 15 seconds; and / or, The high color gamut display module comprises phosphor and silicone; preferably, the phosphor comprises 0.7 to 1.3 parts of yellow-green phosphor, 0.2 to 1.0 parts of yellow phosphor, and 0.06 to 0.15 parts of orange-red phosphor, and no more than 10% of red phosphor; preferably, the silicone comprises 1.2 to 1.5 parts by weight of A-type adhesive and 5.0 to 6.0 parts by weight of B-type adhesive; preferably, the mass ratio of the phosphor to the silicone is (0.05 to 0.12):1; and / or, The cover plate comprises, sequentially arranged, an AF layer, an AR layer, an AG layer, a glass layer, and a screen printing layer; preferably, the thickness of the AF layer is 2nm~10nm; preferably, the thickness of the AR layer is 0.06mm~0.17mm; preferably, the thickness of the AG layer is 0.05mm~0.2mm; and / or, The cover plate has a thickness of 0.4mm to 6.0mm; and / or, The thickness of the SCA optical adhesive layer is 0.15mm~0.3mm; and / or, The thickness of the high color gamut display module is 2.0mm~3.0mm.

4. The fully laminated touchscreen assembly as described in claim 1, characterized in that, The fully laminated touch screen assembly also includes a sensor functional sheet and an OCA adhesive sequentially disposed between the SCA optical adhesive layer and the high color gamut display module; Preferably, the thickness of the cover plate is 0.4mm to 6.0mm; Preferably, the thickness of the SCA optical adhesive layer is 0.15 mm to 0.3 mm; Preferably, the thickness of the sensor functional sheet is 0.55mm to 1.1mm; Preferably, the thickness of the OCA adhesive is 0.2mm to 0.3mm; Preferably, the thickness of the high color gamut display module is 2.0mm to 4.0mm.

5. The fully laminated touchscreen assembly as described in claim 1, characterized in that, The high color gamut display module includes a module frame, and a light source and an optical film assembly disposed within the module frame; the optical film assembly includes a reflective sheet, a light guide plate, and a diffuser sheet stacked sequentially. Preferably, the reflective sheet is made of PET and has a thickness of 0.5 mm; Preferably, the light guide plate is made of PMMA and has a thickness of 2.0 mm; Preferably, the diffuser sheet is made of PET, has a thickness of 1.0 mm, and a transmittance of 40%.

6. The fully laminated touchscreen assembly as described in claim 5, characterized in that, The high color gamut display module is an edge-lit backlight structure or a direct-lit backlight structure; When the high color gamut display module is a side-lit backlight structure, the light guide plate is provided with dimming dots. The dimming dots are densely arranged on the side away from the light source and sparsely arranged on the side closer to the light source, showing a gradient decreasing pattern. When the high color gamut display module has a direct-lit backlight structure, the light guide plate is provided with dimming dots, which correspond one-to-one with the light source below and are evenly distributed in a regular matrix; and / or, The light source is an LED lamp bead, and the operating parameters of the LED lamp bead meet at least one of the following conditions: A. Operating current is 58mA~61mA; B. Forward voltage is 2.6V~2.9V; C. Power is 160mW~170mW; D. Luminous flux is 25lm~32lm; E. Luminous efficacy is 150lm / W~185lm / W. E. The color rendering index Ra is 75~90; preferably, when the high color gamut display module is a direct-lit backlight structure, the LED beads are also covered with a glass lens.

7. A method for manufacturing a fully laminated touchscreen assembly as described in any one of claims 1-6, characterized in that, include: The cover plate is subjected to surface treatment to obtain a surface-treated cover plate; the surface treatment includes anti-glare treatment, anti-reflection treatment and anti-fingerprint treatment. The surface-treated cover plate, SCA optical adhesive layer and high color gamut display module are sequentially bonded together to obtain a gapless fully laminated touch screen assembly.

8. The method for preparing the fully laminated touchscreen assembly as described in claim 7, characterized in that, The anti-glare treatment includes: The cover plate is cleaned. The surface of the cover plate after cleaning is corroded with hydrofluoric acid solution, and the corroded cover plate is subjected to multi-stage sandblasting treatment. The frosted cover plate is then washed, polished, and dried to form an AF layer. Preferably, the volume ratio of the hydrofluoric acid solution is 1:(10~20); Preferably, the thickness of the AG layer is 0.05mm to 0.2mm; Preferably, the frosting agent used in the multi-stage frosting treatment comprises the following components in parts by weight: Ammonium bifluoride 20~30; Ammonium fluorosilicate 5~10; Hydrochloric acid 0~10; Citric acid 5~10; Ammonium fluorosilicate 2~8; Calcium fluoride 10~20; Water 20~25; Viscosity modifier 2-4; Preferably, the cleaning agent used in the cleaning process includes: 5% ethylene glycol monobutyl ether, 0.3% additive, 12% propanol, 0.8% nonylphenol polyoxyethylene ether, 0.3% nonionic surfactant, and the balance being water; Preferably, the cleaning agent used in the cleaning process includes: 0.30% fatty alcohol polyoxygen, 2.5% ammonia (28%), 3% ethylene ether, 0.01%~3% fragrance, and the balance being water.

9. The method for preparing the fully laminated touchscreen assembly as described in claim 7, characterized in that, The anti-reflection treatment includes: In a vacuum environment, an antireflective membrane material is deposited on the surface of the cover plate using a physical vapor deposition process to form a deposited film layer. The film layer is cooled and cured to form an AR layer; Preferably, the deposition temperature is 250℃~450℃; Preferably, the working pressure of sputtering coating during the deposition process is 10. -2 Pa ~ 10 Pa; Preferably, the working pressure of ion plating during the deposition process is 10. -5 Pa~10 -6 Pa; Preferably, the deposition rate of the sputtered film during the deposition process is 0.01 μm / min to 0.5 μm / min; Preferably, the deposition rate of ion plating during the deposition process is 0.1 μm / min to 50 μm / min.

10. The method for preparing the fully laminated touchscreen assembly as described in claim 7, characterized in that, The anti-fingerprint treatment includes: cleaning the cover plate and fixing the cleaned cover plate onto the stage of a vacuum evaporation coating apparatus; under vacuum conditions, starting the evaporation source to deposit an AF layer containing SiO2 on the surface of the cover plate; and / or, The step involves sequentially bonding the surface-treated cover plate, SCA optical adhesive layer, and high color gamut display module, including: bonding the cover plate to the SCA adhesive in a vacuum environment, followed by a first vacuum degassing treatment and UV curing treatment to obtain a bonded structure with the SCA optical adhesive layer; bonding the side of the bonded structure away from the cover plate to the high color gamut display module, followed by a second vacuum degassing treatment to obtain the fully bonded touch screen assembly; preferably, the temperature of the first vacuum degassing treatment is 50℃~60℃; preferably, the time of the first vacuum degassing treatment is not less than 30 minutes; preferably, the first vacuum degassing treatment is performed under a pressure of not less than 0.6 MPa; preferably, the temperature of the second vacuum degassing treatment is 50℃~60℃; preferably, the time of the second vacuum degassing treatment is 20 minutes~30 minutes; preferably, the second vacuum degassing treatment is performed under a pressure of not less than 0.6 MPa.

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