Polarizer, optical functional layer coating and display device

Abstract

The invention provides a polaroid, an optical functional layer coating and a display device. The polaroid comprises an optical function layer, and the optical function layer comprises thermocuring resin, first ultraviolet curing resin, second ultraviolet curing resin and needle-shaped particles. The molecular weight of the thermocuring resin is 500,000-1,500,000, the number of acrylic functional groups of the first ultraviolet curing resin is 5-50, the number of acrylic functional groups of the second ultraviolet curing resin is 2-5, and the ratio of the length of the needle-shaped particles to the diameter of the cross section is 5-60. The optical functional layer coating comprises the components, a photoinitiator, a dispersing agent and a solvent, and the mass of the needle-shaped particles accounts for 6-18% of the mass of the optical functional layer coating. The display device comprises a display panel and a polaroid. Through specific combination of the three kinds of resin and the needle-shaped particles, the technical problem that the viewing angle increasing capacity of the polaroid is limited is solved.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a polarizer, an optical functional layer coating, and a display device. Background Technology

[0002] In display devices such as Liquid Crystal Display (LCD) and Organic Light-Emitting Diode (OLED), the polarizer is one of the core optical components. Traditional polarizers have a narrow viewing angle, which limits further improvements in the display performance of the device.

[0003] Traditional techniques for increasing the viewing angle of polarizers mainly include microstructure solutions and functional particle solutions. While microstructure solutions can achieve the effect of increasing the viewing angle, they are complex to manufacture, requiring special processes such as imprinting, resulting in high costs, and are prone to optical defects such as moiré patterns. Although functional particle solutions are relatively simpler in structure, existing functional particle solutions still use a single resin, which suffers from poor particle dispersion, limited ability to increase the viewing angle, and poor mechanical properties, failing to meet the performance requirements of display devices.

[0004] Therefore, it is necessary to propose a new technical solution to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of the embodiments of this application is to provide a polarizer, an optical functional layer coating, and a display device, which aims to solve the technical problem that the polarizer in the prior art has limited ability to increase the viewing angle.

[0006] An embodiment of this application provides a polarizer, the polarizer comprising an optical functional layer, the optical functional layer comprising: a thermosetting resin having a molecular weight of 500,000 to 1,500,000; a first UV-curable resin having 5 to 50 acrylate functional groups; a second UV-curable resin having 2 to 5 acrylate functional groups; and needle-like particles having a length-to-diameter ratio of 5 to 60; wherein the mass of the needle-like particles accounts for 10% to 20% of the mass of the optical functional layer, and the mass ratio of the thermosetting resin, the first UV-curable resin, and the second UV-curable resin is 0.5 to 1.5:0.5 to 1.5:0.5 to 1.5.

[0007] In the above-mentioned polarizer, the polarizer further includes a polyvinyl alcohol layer; the optical functional layer is disposed on the polyvinyl alcohol layer.

[0008] In the above-mentioned polarizer, the polarizer further includes: a polyvinyl alcohol layer; and a substrate film disposed on the polyvinyl alcohol layer; wherein the optical functional layer is disposed on the substrate film.

[0009] In the above-mentioned polarizer, the polarizer further includes: a release film; a pressure-sensitive adhesive layer disposed on the release film; a compensation film disposed on the pressure-sensitive adhesive layer; a low-reflection layer disposed on the optical functional layer; and a surface protective film disposed on the low-reflection layer; wherein the polyvinyl alcohol layer is disposed on the compensation film.

[0010] In the aforementioned polarizer, the length of the needle-like particles is 10 to 30 micrometers, and the cross-sectional diameter of the needle-like particles is 0.5 to 2 micrometers.

[0011] In the aforementioned polarizer, the thickness of the optical functional layer is 10 micrometers to 30 micrometers.

[0012] Embodiments of this application also provide an optical functional layer coating, the optical functional layer coating comprising: a thermosetting resin having a molecular weight of 500,000 to 1,500,000; a first UV-curable resin having 5 to 50 acrylate functional groups; a second UV-curable resin having 2 to 5 acrylate functional groups; needle-like particles having a length-to-cross-sectional diameter ratio of 5 to 60, the mass of the needle-like particles accounting for 6% to 18% of the mass of the optical functional layer coating; and a photoinitiator having a mass percentage of the total mass of the optical functional layer coating. The optical functional layer coating comprises 0.5% to 5% by mass; a dispersant comprising 0.1% to 1% by mass of the optical functional layer coating; and a solvent comprising 10% to 40% by mass of the optical functional layer coating; wherein the mass ratio of the thermosetting resin, the first UV-curing resin, and the second UV-curing resin is 0.5 to 1.5: 0.5 to 1.5: 0.5 to 1.5, and the total mass of the thermosetting resin, the first UV-curing resin, and the second UV-curing resin comprises 15% to 45% by mass of the optical functional layer coating.

[0013] In the above-mentioned optical functional layer coating, the solvent is selected from any one or a combination of acetone, butyl acetate, propylene glycol monomethyl ether acetate, and ethyl lactic acid.

[0014] In the aforementioned optical functional layer coating, the mass of the needle-like particles accounts for 12% of the mass of the optical functional layer coating.

[0015] In the above-mentioned optical functional layer coating, the mass ratio of the thermosetting resin, the first UV-curing resin and the second UV-curing resin is 1:1:1.

[0016] In the aforementioned optical functional layer coating, the total mass of the thermosetting resin, the first UV-curing resin, and the second UV-curing resin accounts for 30% of the mass of the optical functional layer coating.

[0017] In the aforementioned optical functional layer coating, the needle-like particles are selected from any one or a combination of silicon dioxide, zinc oxide, titanium dioxide, and calcium carbonate.

[0018] In the aforementioned optical functional layer coating, the thermosetting resin is selected from any one or a combination of acrylic resin, amino resin, and epoxy resin; the first UV-curing resin is selected from any one or a combination of acrylate resin, epoxy acrylate resin, and polyurethane acrylate resin; and the second UV-curing resin is selected from any one or a combination of acrylate resin, epoxy acrylate resin, and polyurethane acrylate resin.

[0019] In the above-mentioned optical functional layer coating, the glass transition temperature of the thermosetting resin is greater than 0°C.

[0020] Embodiments of this application also provide a display device, including: a display panel; and the aforementioned polarizer, wherein the polarizer is disposed on the display panel.

[0021] The polarizer provided in this application solves the technical problem of limited viewing angle enhancement capability of existing polarizers through a specific combination of thermosetting resin, first UV-curable resin, second UV-curable resin, and needle-like particles in the optical functional layer. The thermosetting resin in this optical functional layer has a molecular weight of 500,000 to 1,500,000; the first UV-curable resin has 5 to 50 acrylate functional groups; the second UV-curable resin has 2 to 5 acrylate functional groups; the ratio of the length to the cross-sectional diameter of the needle-like particles is 5 to 60; the mass of the needle-like particles accounts for 10% to 20% of the mass of the optical functional layer; and the mass ratio of the thermosetting resin, the first UV-curable resin, and the second UV-curable resin is 0.5 to 1.5:0.5 to 1.5:0.5 to 1.5. This technical solution achieves the effect of increased viewing angle through a combination of resins with three different curing methods and cross-linking densities. The thermosetting resin has a molecular weight of 500,000 to 1,500,000, forming a long-chain polymer network during thermosetting, giving the optical functional layer basic mechanical properties and dimensional stability. The first UV-curable resin has 5 to 50 acrylic functional groups, undergoing a high-density cross-linking reaction under UV radiation to form a dense cross-linked network, resulting in high surface hardness for the optical functional layer. The second UV-curable resin has 2 to 5 acrylic functional groups and a relatively low cross-linking density, maintaining appropriate flexibility while forming a good interfacial bond with the substrate. The length-to-diameter ratio of the needle-like particles is 5 to 60. This aspect ratio causes the needle-like particles to produce a directional light scattering effect in the optical functional layer. When light is incident at different angles, the angle between the long axis of the needle-like particles and the direction of light propagation changes, resulting in a corresponding change in the angular distribution of scattered light. This adjusts the propagation path of light at different viewing angles, thereby expanding the viewing angle. The mass of the needle-like particles accounts for 10% to 20% of the mass of the optical functional layer, avoiding insufficient widening of the viewing angle due to too low a particle content, or decreased optical transmittance due to too high a particle content.

[0022] The optical functional layer coating provided in this application comprises a thermosetting resin, a first UV-curable resin, a second UV-curable resin, needle-like particles, a photoinitiator, a dispersant, and a solvent. The needle-like particles constitute 6% to 18% of the mass of the optical functional layer coating, the photoinitiator constitutes 0.5% to 5% of the mass of the optical functional layer coating, the dispersant constitutes 0.1% to 1% of the mass of the optical functional layer coating, the solvent constitutes 10% to 40% of the mass of the optical functional layer coating, and the total mass of the thermosetting resin, the first UV-curable resin, and the second UV-curable resin constitutes 15% to 45% of the mass of the optical functional layer coating. The photoinitiator in this coating ensures that the UV-curable resin fully initiates the polymerization reaction under light irradiation, and the dispersant improves the dispersion of the needle-like particles in the resin matrix, preventing localized uneven optical properties caused by particle aggregation.

[0023] Compared to existing technologies that use a single resin for the optical functional layer, the polarizer in this application overcomes the problems of high brittleness and insufficient adhesion that often occur after curing a single resin by using a composite of a thermosetting resin and two UV-curable resins with different numbers of acrylic functional groups. The synergistic effect of the three resins gives the optical functional layer sufficient hardness to resist external scratches while maintaining appropriate flexibility to accommodate the thermal expansion and contraction of the substrate, and ensuring a strong bond with the substrate. This technical solution increases the viewing angle of the polarizer from the traditional approximately 108° to over 160°, maintaining good optical transmittance and mechanical properties while improving viewing angle performance.

[0024] In summary, the polarizer, optical functional layer coating, and display device provided in this application achieve the technical effects of significantly increased viewing angle and balanced hardness and adhesion, making them suitable for the wide viewing angle application requirements of large-size display devices. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the first embodiment of the display device provided in this application.

[0026] Figure 2 This is a schematic diagram of a second embodiment of the display device provided in this application.

[0027] Figure 3 yes Figure 1 or Figure 2 A schematic diagram of one embodiment of the polarizer in the display device shown.

[0028] Figure 4 yes Figure 1 or Figure 2 A schematic diagram of another embodiment of the polarizer in the display device shown.

[0029] Figure 5 yes Figure 3 The diagram shows a cross-sectional view of the optical functional layer in the polarizer.

[0030] Figure 6 yes Figure 3 A top view of the optical functional layer in the polarizer shown. Detailed Implementation

[0031] The specific embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0032] The terms “first,” “second,” and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different technical features. The terms “multiple” and similar words mean two or more, unless otherwise expressly specified.

[0033] The embodiments of this application can be combined with each other.

[0034] This application provides a polarizer, an optical functional layer coating, and a display device. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0035] The embodiments of this application provide a polarizer and an optical functional layer coating. The polarizer includes an optical functional layer, and the optical functional layer coating is used to prepare the optical functional layer. By using a thermosetting resin and two UV-curable resins, and adding a specific amount of needle-like particles, the wide viewing angle performance, hardness and adhesion are optimized.

[0036] In display panels 101 such as liquid crystal display panels and organic light-emitting diode display panels, the polarizer 102, as a core optical component, plays a crucial role in improving the display effect by extending its viewing angle. Existing single ultraviolet curing combinations suffer from technical problems such as insufficient particle orientation control, poor resin mechanical properties, and poor particle dispersion stability, which limit further improvements in wide-viewing-angle performance.

[0037] like Figure 3 As shown, the polarizer 102 provided in the embodiments of this application includes a substrate film 1025 and an optical functional layer 1026 disposed on the substrate film 1025. The polarizer 102 also includes a release film 1021, a pressure-sensitive adhesive layer 1022, a compensation film 1023, a polyvinyl alcohol layer 1024, a low-reflection layer 1027, and a surface protective film 1028. The pressure-sensitive adhesive layer 1022 is disposed on the release film 1021, the compensation film 1023 is disposed on the pressure-sensitive adhesive layer 1022, the polyvinyl alcohol layer 1024 is disposed on the compensation film 1023, the substrate film 1025 is disposed on the polyvinyl alcohol layer 1024, the optical functional layer 1026 is disposed on the substrate film 1025, the low-reflection layer 1027 is disposed on the optical functional layer 1026, and the surface protective film 1028 is disposed on the low-reflection layer 1027.

[0038] In one embodiment of this application, the material of the substrate film 1025 is selected from any one of polymethyl methacrylate (PMMA), polyethylene terephthalate (PET), cellulose triacetate (TAC), polycarbonate (PC), or a composite film thereof.

[0039] The substrate film 1025 is a transparent film with a thickness ranging from 25 micrometers to 200 micrometers, for example, 25 micrometers, 50 micrometers, 75 micrometers, 100 micrometers, 125 micrometers, 150 micrometers, 175 micrometers, or 200 micrometers. The substrate film 1025 serves as the supporting substrate for the optical functional layer 1026.

[0040] In one embodiment of this application, the optical functional layer 1026 includes a thermosetting resin, a first UV-curable resin, a second UV-curable resin, and needle-like particles 10261. The thermosetting resin has a molecular weight of 500,000 to 1,500,000, the first UV-curable resin has 5 to 50 acrylate functional groups, the second UV-curable resin has 2 to 5 acrylate functional groups, and the ratio of the length L to the cross-sectional diameter D of the needle-like particles 10261 is 5 to 60. The mass of the needle-like particles 10261 accounts for 10% to 20% of the mass of the optical functional layer 1026, and the mass ratio of the thermosetting resin, the first UV-curable resin, and the second UV-curable resin is 0.5 to 1.5: 0.5 to 1.5: 0.5 to 1.5.

[0041] In one embodiment of this application, the thermosetting resin is selected from any one or a combination of acrylic resin, amino resin, and epoxy resin. The molecular weight of the thermosetting resin is from 500,000 to 1,500,000, for example, 500,000, 600,000, 700,000, 800,000, 900,000, 1,000,000, 1,100,000, 1,200,000, 1,300,000, 1,400,000, or 1,500,000. The glass transition temperature of the thermosetting resin is greater than 0 degrees Celsius, for example, 5 degrees Celsius, 10 degrees Celsius, 15 degrees Celsius, 20 degrees Celsius, 25 degrees Celsius, 30 degrees Celsius, 35 degrees Celsius, 40 degrees Celsius, 45 degrees Celsius, or 50 degrees Celsius. The thermosetting resin may be, for example, Joncryl 67 acrylic resin purchased from BASF (Germany) or Paraaloid A-11 acrylic resin purchased from Rohm and Haas (USA). The thermosetting resin is used to provide the basic framework of the optical functional layer 1026 during the curing process, ensuring the dimensional stability and mechanical strength of the optical functional layer 1026.

[0042] In one embodiment of this application, the first UV-curable resin is selected from acrylate resins, epoxy acrylate resins, or polyurethane acrylate resins. The number of acrylate functional groups in the first UV-curable resin is 5 to 50, for example, 5, 8, 10, 12, 15, 18, 20, 25, 30, 35, 40, 45, or 50. The first UV-curable resin may, for example, be CN991 polyurethane acrylate resin purchased from Hooker GmbH, Germany, or Ebecryl 8810 epoxy acrylate resin purchased from Arkema GmbH, Belgium. The first UV-curable resin is used to provide hardness. The first UV-curable resin is a resin with high acrylate functional groups and high crosslinking density, forming a dense three-dimensional network, which significantly improves the film hardness, achieving a pencil hardness requirement of 2H or higher.

[0043] In one embodiment of this application, the second UV-curing resin is selected from acrylate resins, epoxy acrylate resins, or polyurethane acrylate resins. The number of acrylate functional groups in the second UV-curing resin is 2 to 5, for example, 2, 3, 4, or 5. The second UV-curing resin may be, for example, CN996 polyurethane acrylate resin purchased from Hooker GmbH, Germany, or Ebecryl 8301 polyurethane acrylate resin purchased from Arkema GmbH, Belgium. The second UV-curing resin is used to provide adhesion. The second UV-curing resin is selected as a flexible polyurethane acrylate resin with low acrylate functional groups and moderate crosslinking, forming good interfacial wetting and mechanical interlocking with the substrate film 1025, improving the adhesion of the film layer and achieving 5B-level adhesion.

[0044] The mass ratio of the thermosetting resin, the first UV-curable resin, and the second UV-curable resin is 0.5 to 1.5 to 0.5 to 1.5 to 0.5 to 1.5. In one embodiment, the mass ratio of the thermosetting resin, the first UV-curable resin, and the second UV-curable resin is 1 to 1 to 1. In another embodiment, the mass ratio is 1 to 1.5 to 0.5. In yet another embodiment, the mass ratio is 1 to 0.5 to 1.5. In still another embodiment, the mass ratio is 1 to 1.2 to 0.8. The total mass of the thermosetting resin, the first UV-curable resin, and the second UV-curable resin accounts for 25% to 50% of the mass of the optical functional layer 1026, for example, 25%, 30%, 35%, 40%, 45%, or 50%.

[0045] In one embodiment of this application, the mass percentage of needle-like particles 10261 can be determined by thermogravimetric analysis. Specifically, 5 to 10 milligrams of the optical functional layer 1026 sample are taken and heated from room temperature to 800 degrees Celsius at a rate of 10 degrees Celsius per minute under nitrogen protection. The mass change curve of the sample is recorded. Within this temperature range, the organic resin decomposes and volatilizes, while the inorganic needle-like particles 10261 remain stable. The mass percentage of needle-like particles 10261 in the optical functional layer 1026 is determined by calculating the ratio of the residual mass at 800 degrees Celsius to the initial mass. This method can accurately verify whether the mass percentage of needle-like particles 10261 is within the range of 10% to 20%.

[0046] In one embodiment of this application, the mass ratio of the thermosetting resin, the first UV-curable resin, and the second UV-curable resin can be determined by gel permeation chromatography combined with nuclear magnetic resonance spectroscopy. Specifically, the optical functional layer 1026 sample is dissolved in tetrahydrofuran solvent, and resin components of different molecular weights are separated by gel permeation chromatography. The molecular weight of the thermosetting resin is 500,000 to 1,500,000, significantly higher than that of the first and second UV-curable resins. The chemical composition of each separated component is analyzed by nuclear magnetic resonance spectroscopy, and the relative content of each resin is calculated based on the integral area ratio of the characteristic peaks. The first and second UV-curable resins are distinguished by the difference in the number of acrylate functional groups; the first UV-curable resin has 5 to 50 acrylate functional groups, while the second UV-curable resin has 2 to 5. This method can accurately verify whether the mass ratio of the three resins is within the range of 0.5 to 1.5: 0.5 to 1.5: 0.5 to 1.5.

[0047] like Figure 5 and Figure 6 As shown, the needle-like particles 10261 have an elongated morphology, with a length L to cross-sectional diameter D ratio of 5 to 60, for example, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, or 60. The length L of the needle-like particles 10261 is 10 micrometers to 30 micrometers, for example, 10 micrometers, 12 micrometers, 15 micrometers, 18 micrometers, 20 micrometers, 22 micrometers, 25 micrometers, 28 micrometers, or 30 micrometers. The cross-sectional diameter D of the needle-like particles 10261 is 0.5 micrometers to 2 micrometers, for example, 0.5 micrometers, 0.7 micrometers, 1.0 micrometers, 1.2 micrometers, 1.5 micrometers, 1.7 micrometers, or 2.0 micrometers. The mass of the needle-like particles 10261 accounts for 10% to 20% of the mass of the optical functional layer 1026, preferably 15%. The needle-like particles 10261 are selected from any one or a combination of silicon dioxide, zinc oxide, titanium oxide, and calcium carbonate. Needle-shaped particles 10261 are uniformly dispersed in the resin. Through their orientation and light scattering characteristics, they can regulate the light propagation path at different viewing angles, thereby improving the overall viewing angle.

[0048] In one embodiment of this application, the optical functional layer 1026 further includes a photoinitiator and a dispersant. The photoinitiator is used to initiate a UV-induced polymerization reaction. The photoinitiator accounts for 0.5% to 5% of the mass of the optical functional layer 1026, for example, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, or 5%. The photoinitiator may be, for example, selected from Irgacure 184 photoinitiator purchased from BASF, Germany, Irgacure 1173 photoinitiator purchased from BASF, Germany, or a combination thereof. The photoinitiator decomposes under UV irradiation to generate free radicals, initiating the polymerization reaction of acrylate monomers. The dispersant is used to promote the uniform distribution of needle-like particles 10261 in the resin and prevent agglomeration. The dispersant accounts for 0.01% to 0.1% of the mass of the optical functional layer 1026, for example, 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, or 0.1%. The dispersant is selected from BYK-980 dispersant purchased from BYK Chemicals GmbH, Germany, DISPERBYK-111 dispersant purchased from BYK Chemicals GmbH, Germany, or a mixture thereof. The dispersant effectively inhibits the aggregation of needle-like particles 10261 through steric hindrance and electrostatic stabilization, improving the uniformity of particle dispersion in the resin.

[0049] In one embodiment of this application, the optical functional layer 1026 further includes a solvent. The solvent is used to adjust the viscosity of the mixture and the coating properties. The amount of solvent added is 10% to 40% of the total mass of the optical functional layer 1026, for example, 10%, 15%, 20%, 25%, 30%, 35%, or 40%. The solvent is selected from acetone, butyl acetate, propylene glycol methyl ether acetate (PGMEA), ethyl lactic acid, or mixtures thereof.

[0050] In one embodiment of this application, the thickness of the optical functional layer 1026 is 10 micrometers to 30 micrometers, for example, 10 micrometers, 12 micrometers, 15 micrometers, 18 micrometers, 20 micrometers, 22 micrometers, 25 micrometers, 28 micrometers or 30 micrometers.

[0051] In one embodiment of this application, the optical functional layer 1026 has a viewing angle greater than or equal to 160°, a pencil hardness greater than or equal to 2H, and an adhesion rating of 5B.

[0052] The optical functional layer 1026 of this application is used to achieve a wide viewing angle and adjust the optical phase retardation. The phase retardation value of the optical functional layer is less than 3000 nm, allowing the polarizer 102 to provide wide viewing angle performance while effectively controlling the optical phase difference. The phase retardation value of the optical functional layer is, for example, 1000 nm, 1200 nm, 1500 nm, 1800 nm, 2000 nm, 2200 nm, 2500 nm, 2800 nm, and 3000 nm. The retardation value of the optical functional layer 1026 in this application is preferably between 1000 nm and 2500 nm. When the retardation value is controlled within this range, the optical functional layer 1026 can provide good wide viewing angle performance while effectively suppressing rainbow effects. The retardation value can be controlled by adjusting the content and orientation of the needle-like particles 10261 and the ratio of the three resins.

[0053] The phase retardation value of the optical functional layer 1026 was measured using an ellipsometer. The measurement method was as follows: the polarizer 102 sample containing the optical functional layer 1026 was placed on the sample stage of the ellipsometer, and monochromatic light with a wavelength of 550 nm was incident perpendicularly. The change in polarization state after passing through the sample was measured, and the phase retardation value of the optical functional layer 1026 was calculated.

[0054] like Figure 4 As shown, in one embodiment of this application, the polarizer 102 does not include a substrate film 1025. The polarizer 102 includes a polyvinyl alcohol layer 1024 and an optical functional layer 1026 directly disposed on the polyvinyl alcohol layer 1024. This embodiment simplifies the film layers of the polarizer 102, reduces the number of interfaces, and helps to reduce the rainbow effect while maintaining the performance of the optical functional layer 1026. The rainbow effect is caused by optical interference between multiple films. By reducing the number of film layers and optimizing interface characteristics, the formation of the rainbow effect can be significantly suppressed.

[0055] The polarizer 102 also includes a release film 1021, a pressure-sensitive adhesive layer 1022, a compensation film 1023, a low-reflection layer 1027, and a surface protective film 1028. The pressure-sensitive adhesive layer 1022 is disposed on the release film 1021, the compensation film 1023 is disposed on the pressure-sensitive adhesive layer 1022, the polyvinyl alcohol layer 1024 is disposed on the compensation film 1023, the optical functional layer 1026 is directly disposed on the polyvinyl alcohol layer 1024, the low-reflection layer 1027 is disposed on the optical functional layer 1026, and the surface protective film 1028 is disposed on the low-reflection layer 1027. When the optical functional layer 1026 is directly disposed on the polyvinyl alcohol layer 1024, a good interface bond is formed between the two, effectively reducing the generation of rainbow patterns.

[0056] The optical functional layer coating provided in the embodiments of this application includes a thermosetting resin, a first UV-curable resin, a second UV-curable resin, needle-like particles 10261, a photoinitiator, a dispersant, and a solvent. The thermosetting resin has a molecular weight of 500,000 to 1,500,000, for example, 500,000, 600,000, 700,000, 800,000, 900,000, 1,000,000, 1,100,000, 1,200,000, 1,300,000, 1,400,000, or 1,500,000. The first UV-curable resin has 5 to 50 acrylate functional groups, for example, 5, 8, 10, 12, 15, 18, 20, 25, 30, 35, 40, 45, or 50. The second UV-curable resin has 2 to 5 acrylate functional groups, for example, 2, 3, 4, or 5. The length-to-diameter ratio of the needle-like particles 10261 is 5 to 60, for example, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, or 60. The mass of the needle-like particles 10261 accounts for 6% to 18% of the mass of the optical functional layer coating, for example, 6%, 8%, 10%, 12%, 14%, 16%, or 18%. The mass of the photoinitiator accounts for 0.5% to 5% of the mass of the optical functional layer coating, for example, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, or 5%. The mass of the dispersant accounts for 0.1% to 1% of the mass of the optical functional layer coating, for example, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, or 1%. The solvent accounts for 10% to 40% of the mass of the optical functional layer coating, for example, 10%, 12%, 15%, 18%, 20%, 22%, 25%, 28%, 30%, 32%, 35%, 38%, or 40%. The mass ratio of the thermosetting resin, the first UV-curing resin, and the second UV-curing resin is 0.5 to 1.5:0.5 to 1.5:0.5 to 1.5, for example, 0.5:0.5:0.5, 0.8:1:1.2, 1:1:1, 1.2:0.8:1, or 1.5:1.5:1.5. The total mass of the thermosetting resin, the first UV-curing resin, and the second UV-curing resin accounts for 15% to 45% of the mass of the optical functional layer coating, for example, 15%, 18%, 20%, 22%, 25%, 28%, 30%, 32%, 35%, 38%, 40%, 42%, or 45%.

[0057] In one embodiment of this application, the solvent in the optical functional layer coating is selected from any one or a combination of acetone, butyl acetate, propylene glycol monomethyl ether acetate, and ethyl lactic acid. The solvent is used to adjust the viscosity and coating properties of the optical functional layer coating, reducing the coating viscosity and improving leveling properties during coating, and evaporating during curing. By selecting different solvents or solvent combinations, the coating process properties of the optical functional layer coating can be adjusted.

[0058] In one embodiment of this application, the needle-like particles 10261 account for 12% of the mass of the optical functional layer coating. At this ratio, the needle-like particles 10261 are uniformly dispersed in the coating without agglomeration, resulting in an optical functional layer 1026 with optimal wide-viewing-angle performance. When the content of needle-like particles 10261 is below 6%, the wide-viewing-angle effect is not significant; when the content is above 18%, the particles are prone to agglomeration, affecting the stability of the coating and the optical performance of the final film.

[0059] In one embodiment of this application, the mass ratio of thermosetting resin, first UV-curing resin, and second UV-curing resin in the optical functional layer coating is 1:1:1. This ratio achieves an optimal balance between hardness and adhesion, resulting in an optical functional layer 1026 with a pencil hardness of 2H and an adhesion rating of 5B. When the proportion of the first UV-curing resin increases, the film hardness increases but the adhesion decreases; when the proportion of the second UV-curing resin increases, the adhesion increases but the hardness decreases.

[0060] In one embodiment of this application, the total mass of the thermosetting resin, the first UV-curing resin, and the second UV-curing resin in the optical functional layer coating accounts for 30% of the total mass of the optical functional layer coating. This content ensures that the coating forms a continuous and uniform film after curing, while also ensuring that the coating has a suitable viscosity for easy coating operation. When the total resin content is less than 15%, the cured film is not continuous enough; when the total resin content is greater than 45%, the coating viscosity is too high, affecting the coating uniformity.

[0061] In one embodiment of this application, the needle-like particles 10261 in the optical functional layer coating are selected from any one or a combination of silicon dioxide, zinc oxide, titanium oxide, and calcium carbonate.

[0062] In one embodiment of this application, the thermosetting resin in the optical functional layer coating is selected from any one or a combination of acrylic resin, amino resin, and epoxy resin; the first UV-curing resin is selected from any one or a combination of acrylate resin, epoxy acrylate resin, and polyurethane acrylate resin; and the second UV-curing resin is selected from any one or a combination of acrylate resin, epoxy acrylate resin, and polyurethane acrylate resin.

[0063] In one embodiment of this application, the glass transition temperature of the thermosetting resin in the optical functional layer coating is greater than 0 degrees Celsius, for example, 5 degrees Celsius, 10 degrees Celsius, 15 degrees Celsius, 20 degrees Celsius, 25 degrees Celsius, 30 degrees Celsius, 35 degrees Celsius, 40 degrees Celsius, 45 degrees Celsius or 50 degrees Celsius.

[0064] After coating and curing, the optical functional layer coating forms an optical functional layer 1026 with excellent wide viewing angle performance, hardness, and adhesion. This coating is suitable for coating various substrates, including polyvinyl alcohol layer 1024, substrate film 1025, etc., and forms a stable optical functional layer 1026 through thermosetting and UV curing.

[0065] Embodiments of this application also provide a display device, including a display panel 101 and the aforementioned polarizer 102 disposed on the display panel 101. The display panel 101 is a liquid crystal display panel, such as... Figure 1 As shown, or, the display panel 101 is an organic light-emitting diode (OLED) display panel, such as... Figure 2 As shown. This display device achieves excellent wide viewing angle performance by employing the polarizer 102 of this application, meeting the wide viewing angle application requirements of large-size display devices.

[0066] Embodiments of this application also provide a method for fabricating an optical functional layer 1026. This method includes two fabrication paths.

[0067] The first approach includes: mixing a thermosetting resin, a first UV-curable resin, and a second UV-curable resin to obtain a resin mixture, wherein the thermosetting resin has a molecular weight of 500,000 to 1,500,000 and a glass transition temperature greater than 0°C, the first UV-curable resin has 5 to 50 acrylic functional groups, the second UV-curable resin has 2 to 5 acrylic functional groups, and the mass ratio of the thermosetting resin, the first UV-curable resin, and the second UV-curable resin is 0.5 to 1.5: 0.5 to 1.5: 0.5 to 1.5; adding needle-like particles 10261, a photoinitiator, a dispersant, and a solvent to the resin mixture and dispersing them to obtain an optical functional layer coating, wherein the photoinitiator accounts for 0.5% to 5% of the mass of the optical functional layer coating, the dispersant accounts for 0.01% to 0.1% of the mass of the optical functional layer coating, and the solvent accounts for 10% to 40% of the mass of the optical functional layer coating. The solvent is selected from at least one of acetone, butyl acetate, propylene glycol methyl ether acetate (PGMEA), ethyl lactic acid, or a mixture thereof. The ratio of the length L of the needle-like particles 10261 to the cross-sectional diameter D is 5 to 60, and the needle-like particles 10261 account for 10% to 20% of the mass of the optical functional layer 1026. The optical functional layer coating is applied to the substrate film 1025. The substrate film 1025 coated with the optical functional layer coating is subjected to thermosetting treatment. The substrate film 1025 after thermosetting treatment is subjected to ultraviolet curing treatment to obtain the optical functional layer 1026 disposed on the substrate film 1025.

[0068] The second approach includes: mixing a thermosetting resin, a first UV-curable resin, and a second UV-curable resin to obtain a resin mixture under the same mixing conditions as the first approach; adding needle-like particles 10261, a photoinitiator, a dispersant, and a solvent to the resin mixture and dispersing them to obtain an optical functional layer coating, with the parameters of the particles, photoinitiator, dispersant, and solvent being the same as in the first approach; directly coating the optical functional layer coating onto a polyvinyl alcohol layer 1024; subjecting the polyvinyl alcohol layer 1024 coated with the optical functional layer coating to a thermosetting treatment; and subjecting the thermosetting polyvinyl alcohol layer 1024 to a UV-curing treatment to obtain an optical functional layer 1026 directly disposed on the polyvinyl alcohol layer 1024.

[0069] In both methods, the thermosetting temperature ranges from 60°C to 120°C, and the time ranges from 5 minutes to 30 minutes. The UV curing energy is 100 mJ / cm². 2 Up to 1000mJ / cm 2 .

[0070] To verify the effectiveness of the technical solution of this application, multiple sets of comparative experiments were conducted.

[0071] Example 1: (1) The thermosetting acrylic resin, the UV-curable polyurethane acrylate resin with 10 acrylic functional groups and the UV-curable polyurethane acrylate resin with 3 acrylic functional groups are mixed in a mass ratio of 1:1:1. (2) Add 10% of needle-shaped silica particles 10261 (length L is 20 micrometers, cross-sectional diameter D is 1 micrometer, aspect ratio is 20), 2% of Irgacure 184 photoinitiator purchased from BASF, Germany, 25% of DOWANOL™ PMA propylene glycol monomethyl ether acetate solvent purchased from Dow Chemical Company, USA, and 0.5% of BYK-980 dispersant purchased from BYK Chemical Company, Germany, and stir and disperse evenly. (3) The obtained optical functional layer coating was applied to the surface of PMMA substrate film 1025 and heat-cured at 80°C for 15 minutes, followed by a 500 mJ / cm2 curing process. 2 The ultraviolet curing process forms the optical functional layer 1026.

[0072] The resulting optical functional layer 1026 has a viewing angle of 150°, a pencil hardness of 2H, and an adhesion of 5B.

[0073] Example 2: (1) The thermosetting acrylic resin, the UV-curable epoxy acrylate resin with 15 acrylic functional groups and the UV-curable acrylate resin with 4 acrylic functional groups are mixed in a mass ratio of 1:1:1. (2) Add 15% of needle-shaped zinc oxide particles 10261 (length L is 25 micrometers, cross-sectional diameter D is 1.5 micrometers, aspect ratio is 16.7), 3% of Irgacure 1173 photoinitiator purchased from BASF, Germany, 20% of butyl acetate solvent purchased from BASF, Germany, and 0.6% of DISPERBYK dispersant purchased from BYK, Germany, to the mixture, stir and disperse evenly; (3) The obtained optical functional layer coating was applied to the surface of the PET substrate film 1025 and heat-cured at 90°C for 20 minutes, followed by a 600 mJ / cm2 curing process. 2 The ultraviolet curing process forms the optical functional layer 1026.

[0074] The resulting optical functional layer 1026 has a viewing angle of 160°, a pencil hardness of 2H, and an adhesion of 5B.

[0075] Example 3: (1) The thermosetting acrylic resin, the UV-curable polyurethane acrylate resin with 20 acrylic functional groups and the UV-curable polyurethane acrylate resin with 3 acrylic functional groups are mixed in a mass ratio of 1:1:1. (2) Add 20% of needle-shaped titanium dioxide particles 10261 (length L is 15 micrometers, cross-sectional diameter D is 0.8 micrometers, aspect ratio is 18.75), 2.5% of Irgacure 184 photoinitiator purchased from BASF, Germany, 30% of acetone solvent purchased from BASF, Germany, and 0.8% of BYK-980 dispersant purchased from BYK Chemie, Germany, to the mixture, stir and disperse evenly; (3) The obtained optical functional layer coating was applied to the surface of the TAC substrate film 1025 and heat-cured at 100°C for 10 minutes, followed by an 800 mJ / cm2 curing process. 2 The ultraviolet curing process forms the optical functional layer 1026.

[0076] The resulting optical functional layer 1026 has a viewing angle of 156°, a pencil hardness of 2H, and an adhesion of 3B.

[0077] Example 4: (1) The thermosetting acrylic resin, the UV-curable epoxy acrylate resin with 30 acrylic functional groups, and the UV-curable acrylate resin with 2 acrylic functional groups are mixed in a mass ratio of 1:1.5:0.5. (2) Add 15% of needle-shaped silica particles 10261 (length L is 18 micrometers, cross-sectional diameter D is 1.2 micrometers, aspect ratio is 15), 4% of Irgacure 1173 photoinitiator purchased from BASF, Germany, 15% of DOWANOL™ PMA propylene glycol monomethyl ether acetate solvent purchased from Dow Chemical Company, USA, and 0.4% of DISPERBYK dispersant purchased from BYK Chemical Company, Germany, and stir and disperse evenly. (3) The obtained optical functional layer coating was applied to the surface of the SRF substrate film 1025 and heat-cured at 70°C for 25 minutes, followed by a 400 mJ / cm² curing process. 2 The ultraviolet curing process forms the optical functional layer 1026.

[0078] The resulting optical functional layer 1026 has a viewing angle of 160°, a pencil hardness of 4H, and an adhesion of 2B.

[0079] Example 5: (1) The thermosetting acrylic resin, the UV-curable polyurethane acrylate resin with 8 acrylic functional groups and the UV-curable polyurethane acrylate resin with 5 acrylic functional groups are mixed at a mass ratio of 1:0.5:1.5. (2) Add 15% of needle-shaped calcium carbonate particles 10261 (length L is 22 micrometers, cross-sectional diameter D is 1.8 micrometers, aspect ratio is 12.2), 1.5% of Irgacure 184 photoinitiator purchased from BASF, Germany, 35% of PURASOLV® ELS ethyl lactic acid solvent purchased from Kyowa Hakko, Japan, and 0.3% of BYK-980 dispersant purchased from BYK Chemie, Germany to the mixture, stir and disperse evenly; (3) The obtained optical functional layer coating was applied to the surface of the PC substrate film 1025 and heat-cured at 110°C for 8 minutes, followed by a 300 mJ / cm² curing process. 2 The ultraviolet curing process forms the optical functional layer 1026.

[0080] The resulting optical functional layer 1026 has a viewing angle of 160°, a pencil hardness of 1H, and an adhesion of 5B.

[0081] Example 6: (1) The thermosetting acrylic resin, the UV-curable epoxy acrylate resin with 25 acrylic functional groups and the UV-curable acrylate resin with 4 acrylic functional groups are mixed in a mass ratio of 1:1.2:0.8. (2) Add 15% of needle-shaped silica particles 10261 (length L is 28 micrometers, cross-sectional diameter D is 0.6 micrometers, aspect ratio is 46.7), 3.5% of Irgacure 1173 photoinitiator purchased from BASF, Germany, 22% of butyl acetate solvent purchased from BASF, Germany, and 0.7% of DISPERBYK-111 dispersant purchased from BYK, Germany to the mixture, stir and disperse evenly; (3) The obtained optical functional layer coating was applied to the surface of PMMA substrate film 1025 and heat-cured at 85°C for 18 minutes, followed by a 700 mJ / cm2 curing process. 2 The ultraviolet curing process forms the optical functional layer 1026.

[0082] The resulting optical functional layer 1026 has a viewing angle of 160°, a pencil hardness of 3H, and an adhesion of 4B.

[0083] Comparative Example 1: (1) Only UV-curable polyurethane acrylate resin with 15 acrylic functional groups is used as the resin; (2) Add 15% of needle-shaped silica particles 10261 (length L is 20 micrometers, cross-sectional diameter D is 1 micrometer, aspect ratio is 20), 3% of Irgacure 184 photoinitiator purchased from BASF, Germany, 25% of DOWANOL™ PMA propylene glycol monomethyl ether acetate solvent purchased from Dow Chemical Company, USA, and 0.5% of BYK-980 dispersant purchased from BYK Chemical Company, Germany, and stir and disperse evenly. (3) The obtained optical functional layer coating is applied to the surface of PMMA substrate film 1025 and subjected to 600 mJ / cm² treatment. 2 The ultraviolet curing process forms the optical functional layer 1026.

[0084] The resulting optical functional layer 1026 has a viewing angle of 120°, a pencil hardness of 5H, an adhesion of 0-1B, and is brittle and prone to cracking.

[0085] Comparative Example 2: (1) The thermosetting acrylic resin, the UV-curable epoxy acrylate resin with 15 acrylic functional groups and the UV-curable acrylate resin with 4 acrylic functional groups are mixed in a mass ratio of 1:1:1. (2) Add 3% of Irgacure 1173 photoinitiator purchased from BASF, Germany, 20% of butyl acetate solvent purchased from BASF, Germany and 0.6% of DISPERBYK dispersant purchased from BYK, Germany to the mixture, stir and disperse evenly, without adding needle-like particles 10261. (3) The obtained optical functional layer coating was applied to the surface of the PET substrate film 1025 and heat-cured at 90°C for 20 minutes, followed by a 600 mJ / cm2 curing process. 2 The ultraviolet curing process forms the optical functional layer 1026.

[0086] The resulting optical functional layer 1026 has a viewing angle of 108°, a pencil hardness of 2H, and an adhesion of 5B, but its wide viewing angle effect is not good.

[0087] Table 1

[0088] As shown in Table 1, by comparing the performance of optical functional layer 1026 with different formulations, it can be seen that when the mass ratio of thermosetting resin, first UV-curing resin, and second UV-curing resin is 1:1:1, and the amount of needle-like particles 10261 added is 15%, the overall performance of optical functional layer 1026 is the best, with a viewing angle of 160°, a pencil hardness of 2H, and an adhesion of 5B. Comparative Example 1 uses a single UV-curing resin, which, although having a hardness as high as 5H, has an adhesion of only 0-1B, and the film layer is brittle and prone to cracking, with a viewing angle of only 120°. Comparative Example 2 does not add needle-like particles 10261, and the viewing angle is only 108°, which cannot meet the requirements for wide-viewing-angle displays. Example 1 uses a mass ratio of 1:1:1, with a particle addition of 10%, achieving a viewing angle of 150°, a pencil hardness of 2H, and an adhesion of 5B, showing a significant improvement in viewing angle. Example 3 used a mass ratio of 1:1:1, with 20% particle addition, a viewing angle of 156°, a pencil hardness of 2H, and an adhesion of 3B. Agglomeration occurred, adhesion decreased, and the viewing angle also slightly decreased. Example 4 used a mass ratio of 1:1.5:0.5, with 15% particle addition, a viewing angle of 160°, a pencil hardness of 4H, and an adhesion of 2B. Hardness increased, but adhesion decreased. Example 5 used a mass ratio of 1:0.5:1.5, with 15% particle addition, a viewing angle of 160°, a pencil hardness of 1H, and an adhesion of 5B. Adhesion increased, but hardness decreased. Example 6 used a mass ratio of 1:1.2:0.8, with 15% particle addition, a viewing angle of 160°, a pencil hardness of 3H, and an adhesion of 4B, achieving balanced performance.

[0089] Table 2

[0090] As shown in Table 2, the optical functional layer 1026 provided in this application, compared with the traditional display panel 101 without wide viewing angle and competing products, achieves a viewing angle of over 160°, comparable to competing products, but superior in transmittance (Tr) and contrast ratio (CR). It also possesses excellent mechanical properties, with a hardness of 500g 2H, adhesion of 5B, and good wear resistance, fully meeting application requirements. The traditional display panel 101 (75 inches) without wide viewing angle has a chromaticity viewing angle of 108°, a transmittance of 5.84%, and a contrast ratio of 6400. Competing products have a chromaticity viewing angle greater than 160°, a transmittance of 4.49%, and a contrast ratio of 2568. This technology has a chromaticity viewing angle greater than 160°, a transmittance of 4.73%, and a contrast ratio of 2709. Compared to competing products, with comparable chromaticity viewing angles, both transmittance and contrast ratio are improved.

[0091] Table 3

[0092] As shown in Table 3, the content of needle-like particles 10261 has a significant impact on the performance of the optical functional layer 1026. When the content of needle-like particles 10261 is 0%, the viewing angle is only 108°; when the content increases to 10%, the viewing angle increases to 150°; when the content reaches 15%, the viewing angle reaches the optimal value of 160°; however, when the content further increases to 20%, due to particle aggregation, the adhesion decreases to 3B, and the viewing angle also decreases slightly to 156°.

[0093] Table 4

[0094] As shown in Table 4, the ratio of thermosetting resin, first UV-curing resin, and second UV-curing resin also significantly affects the performance of the optical functional layer 1026. The optical functional layer 1026 exhibits the best overall performance when the mass ratio of the three resins is 1:1:1. Increasing the proportion of the first UV-curing resin improves hardness but decreases adhesion; conversely, increasing the proportion of the second UV-curing resin improves adhesion but decreases hardness. By adjusting the ratio of the three resins, the performance of the optical functional layer 1026 can be optimized according to different application requirements.

[0095] As can be seen from the comparison of the above embodiments and comparative examples, the optical functional layer 1026 in the polarizer 102 provided in this application adopts a combination of thermosetting resin, first UV-curing resin, second UV-curing resin and needle-like particles 10261, achieving the technical effect of significantly increased viewing angle and balanced hardness and adhesion. When the content of needle-like particles 10261 is 15% and the mass ratio of thermosetting resin, first UV-curing resin and second UV-curing resin is 1:1:1, the overall performance of the optical functional layer 1026 is optimal, with a viewing angle of 160°, a pencil hardness of 2H and an adhesion of 5B.

[0096] The embodiments of this application achieve a harmonious balance between high hardness, high adhesion, and ultra-wide viewing angle in the film layer through a combination of needle-like particles 10261 and various resins, offering significant advantages over traditional single resins or single-function materials. This optical functional layer 1026 is suitable for polarizers 102 in various display devices such as liquid crystal display panels and organic light-emitting diode display panels, and is particularly suitable for the wide viewing angle requirements of large-size display devices.

[0097] The embodiments of this application have been described in detail above. The content of this specification should not be construed as limiting the scope of protection of this application.

Claims

1. A polarizer, characterized in that, The polarizer includes an optical functional layer, which comprises: Thermosetting resin, wherein the molecular weight of the thermosetting resin is 500,000 to 1,500,000; The first UV-curable resin has 5 to 50 acrylic functional groups. A second UV-curable resin, wherein the number of acrylic functional groups in the second UV-curable resin is 2 to 5; and Needle-shaped particles, wherein the ratio of the length of the needle-shaped particles to the diameter of the cross-section is 5 to 60; The needle-like particles account for 10% to 20% of the mass of the optical functional layer, and the mass ratio of the thermosetting resin, the first UV-curing resin and the second UV-curing resin is 0.5 to 1.5: 0.5 to 1.5: 0.5 to 1.

5.

2. The polarizer according to claim 1, characterized in that, The polarizer also includes a polyvinyl alcohol layer; The optical functional layer is disposed on the polyvinyl alcohol layer.

3. The polarizer according to claim 1, characterized in that, The polarizer also includes: Polyvinyl alcohol layer; and A substrate film is disposed on the polyvinyl alcohol layer; The optical functional layer is disposed on the substrate film.

4. The polarizer according to claim 2 or 3, characterized in that, The polarizer also includes: Release film; A pressure-sensitive adhesive layer is disposed on the release film; A compensation membrane is disposed on the pressure-sensitive adhesive layer; A low-reflection layer is disposed on the optical functional layer; and A surface protective film is disposed on the low-reflection layer; The polyvinyl alcohol layer is disposed on the compensation film.

5. The polarizer according to claim 1, characterized in that, The needle-like particles have a length of 10 to 30 micrometers and a cross-sectional diameter of 0.5 to 2 micrometers.

6. The polarizer according to claim 1, characterized in that, The thickness of the optical functional layer is 10 micrometers to 30 micrometers.

7. An optical functional layer coating, characterized in that, The optical functional layer coating includes: Thermosetting resin, wherein the molecular weight of the thermosetting resin is 500,000 to 1,500,000; The first UV-curable resin has 5 to 50 acrylic functional groups. The second UV-curable resin has 2 to 5 acrylic functional groups. Needle-shaped particles, wherein the length-to-diameter ratio of the needle-shaped particles is 5 to 60, and the mass of the needle-shaped particles accounts for 6% to 18% of the mass of the optical functional layer coating; A photoinitiator, wherein the mass of the photoinitiator accounts for 0.5% to 5% of the mass of the optical functional layer coating; A dispersant, wherein the mass of the dispersant accounts for 0.1% to 1% of the mass of the optical functional layer coating; and The solvent comprises 10% to 40% of the mass of the optical functional layer coating; The mass ratio of the thermosetting resin, the first UV-curing resin, and the second UV-curing resin is 0.5 to 1.5: 0.5 to 1.5: 0.5 to 1.5, and the total mass of the thermosetting resin, the first UV-curing resin, and the second UV-curing resin accounts for 15% to 45% of the mass of the optical functional layer coating.

8. The optical functional layer coating according to claim 7, characterized in that, The solvent is selected from any one or a combination of acetone, butyl acetate, propylene glycol monomethyl ether acetate, and ethyl lactic acid.

9. The optical functional layer coating according to claim 7, characterized in that, The mass of the needle-like particles accounts for 12% of the mass of the optical functional layer coating.

10. The optical functional layer coating according to claim 7, characterized in that, The mass ratio of the thermosetting resin, the first UV-curing resin, and the second UV-curing resin is 1:1:

1.

11. The optical functional layer coating according to claim 7, characterized in that, The total mass of the thermosetting resin, the first UV-curing resin, and the second UV-curing resin accounts for 30% of the mass of the optical functional layer coating.

12. The optical functional layer coating according to claim 7, characterized in that, The needle-like particles are selected from any one or a combination of silicon dioxide, zinc oxide, titanium dioxide, and calcium carbonate.

13. The optical functional layer coating according to claim 7, characterized in that, The thermosetting resin is selected from any one or a combination of acrylic resin, amino resin, and epoxy resin. The first UV-curable resin is selected from any one or a combination of acrylate resins, epoxy acrylate resins, and polyurethane acrylate resins; The second UV-curable resin is selected from any one or a combination of acrylate resins, epoxy acrylate resins, and polyurethane acrylate resins.

14. The optical functional layer coating according to claim 7, characterized in that, The glass transition temperature of the thermosetting resin is greater than 0°C.

15. A display device, characterized in that, include: Display panel; as well as The polarizer as described in any one of claims 1 to 6, wherein the polarizer is disposed on the display panel.

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