Polarizer and display device

Abstract

The invention relates to a polaroid and a display device. The polaroid comprises a polarizing layer and a coating functional layer, the polarized light layer comprises a light incident side and a light emergent side which are oppositely arranged, and the coating functional layer is arranged on the light emergent side of the polarized light layer; wherein the coating functional layer comprises a first functional layer, and the first functional layer is in direct contact with the light emitting side of the polarized light layer, or the first functional layer is fixedly connected with the light emitting side of the polarized light layer through a bonding layer. According to the polaroid, the original base material layer is replaced by the coating functional layer, so that the manufacturing cost of the polaroid is reduced, the overall thickness of the polaroid is reduced, and the light transmittance of the polaroid is improved.

Description

Technical Field

[0001] The present application relates to the field of display technologies, and particularly to a polarizer and a display device. Background Art

[0002] A polarizer is an optical element that converts natural light into polarized light. It usually has a "sandwich" laminated structure, that is, the polarizer includes a polarizing film layer located in the middle and playing a polarization role, and a substrate layer and a compensation film layer located on opposite sides of the polarizing layer. Among them, the substrate layer plays a role in protecting the polarizing film layer.

[0003] The materials of the substrate layer of the polarizer are usually selected from materials such as tri-cellulose acetate (TAC), polyethylene terephthalate (PET), polycarbonate (PC), poly(methyl methacrylate) (PMMA), copolymers of cycloolefin (COP / COC), polyethylene naphthalate two formic acid glycol ester (PEN), etc. The manufacturing of these substrate layers is difficult and costly, and the acquisition channels of some products are single, which not only increases the cost of the polarizer, but also limits the development of the polarizer industry. Summary of the Invention

[0004] Embodiments of the present application provide a polarizer and a display device, which replace the substrate layer with a coating functional layer, reduce the manufacturing cost of the polarizer, reduce the overall thickness of the polarizer, and improve the light transmittance of the polarizer.

[0005] To achieve the above object, according to the first aspect of the present application, there is provided a polarizer, which includes:

[0006] A polarizing layer, the polarizing layer includes an incident light side and an outgoing light side arranged oppositely;

[0007] A coating functional layer, provided on the outgoing light side of the polarizing layer;

[0008] Wherein, the coating functional layer includes a first functional layer, the first functional layer is in direct contact with the outgoing light side of the polarizing layer, or the first functional layer is fixedly connected to the outgoing light side of the polarizing layer through an adhesive layer.

[0009] Optionally, the first functional layer includes a coating layer and a functional material, and the functional material is distributed in the coating layer; the functional material includes at least one of inorganic molecules, organic molecules, inorganic particles, and organic particles.

[0010] Optionally, the coating functional layer further includes a second functional layer disposed on a side of the first functional layer away from the polarizing layer, and the second functional layer includes at least one of an anti-glare layer, an anti-static layer, a depolarizing layer, and a low-reflection layer.

[0011] Optionally, the glass transition temperature of the coating functional layer is greater than or equal to -60°C and less than or equal to 160°C.

[0012] Optionally, the elastic modulus of the coating functional layer at 23°C is greater than or equal to 1 MPa and less than or equal to 5000 MPa.

[0013] Optionally, the pencil hardness of the coating functional layer is greater than or equal to 1H / 500g.

[0014] Optionally, the thickness of the coating functional layer is greater than or equal to 10 μm and less than or equal to 50 μm.

[0015] Optionally, the polarizer further includes a compensation film on a side of the polarizing layer away from the coating functional layer, the in-plane retardation value of the compensation film ranges from 0 to 500 nm, and the thickness-direction retardation value of the compensation film ranges from 0 to 500 nm.

[0016] Optionally, the degree of polarization of the polarizer is greater than or equal to 99%; and / or, the light transmittance of the polarizer is greater than or equal to 40%.

[0017] In a second aspect of the present application, a display device is provided, including a display panel and the above-mentioned polarizer, the polarizer is located on a light-emitting side of the display panel, and the coating functional layer is located on a side of the polarizing layer away from the display panel.

[0018] In the polarizer and the display device provided by the present application, by using the first functional layer in the coating functional layer to be directly connected to the polarizing layer or connected through an adhesive layer, it replaces the conventional way of using a substrate layer to achieve support and physical protection for the polarizer. Since the manufacturing method of the coating functional layer is simple, the manufacturing cost of the coating functional layer is low, and the light transmittance of the coating functional layer is high. Therefore, the present application uses the coating functional layer to replace the original substrate layer, reducing the manufacturing cost of the polarizer, reducing the overall thickness of the polarizer, and improving the light transmittance of the polarizer. Description of the Drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present application, the accompanying drawings required for the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] To more fully understand the present application and its beneficial effects, the following description will be made in conjunction with the accompanying drawings, where the same reference numerals in the following description represent the same parts.

[0021] Figure 1 It is a schematic structural diagram of a polarizer provided by the first embodiment of the present application;

[0022] Figure 2 It is a schematic structural diagram of a polarizer provided by the second embodiment of the present application;

[0023] Figure 3 It is a schematic structural diagram of a polarizer provided by the third embodiment of the present application;

[0024] Figure 4 It is a schematic structural diagram of a polarizer provided by the fourth embodiment of the present application;

[0025] Figure 5 It is a schematic structural diagram of a polarizer provided by the fifth embodiment of the present application;

[0026] Figure 6 It is a schematic structural diagram of a polarizer provided by Comparative Example 1 of the present application;

[0027] Figure 7 It is a schematic structural diagram of a polarizer provided by Comparative Example 2 of the present application;

[0028] Figure 8 It is a schematic structural diagram of a display device provided by the embodiments of the present application.

[0029] Reference numerals: A, display device; 100, polarizer; 100a, upper polarizer; 100b, lower polarizer; 200, display panel; 10, coating functional layer; 20, first adhesive layer; 30, polarizing layer; 40, second adhesive layer; 50, compensation film; 60, pressure-sensitive adhesive layer; 70, release film; 80, substrate; 101, first functional layer; 102, second functional layer; 301, light-emitting side; 302, light-incident side; 1011, coating layer; 1012, functional material; 1021, anti-glare layer; 1022, low-reflection layer. Detailed implementation manners

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application.

[0031] Referring to Figures 1 to 5 , an embodiment of the present application provides a polarizer 100, which includes a polarizing layer 30 and a coating functional layer 10. The polarizing layer 30 includes an incident light side 302 and an outgoing light side 301 which are oppositely arranged; the coating functional layer 10 is disposed on the outgoing light side of the polarizing layer 30. Among them, the coating functional layer 10 includes a first functional layer 101. The first functional layer 101 is in direct contact with the outgoing light side 301 of the polarizing layer 30, or the first functional layer 101 is fixedly connected to the outgoing light side 301 of the polarizing layer 30 through a first adhesive layer 20.

[0032] In some embodiments, referring to Figure 2 , the first functional layer 101 includes a coating layer 1011 and a functional material 1012, and the functional material 1012 is distributed in the coating layer 1011; the functional material 1012 includes at least one of inorganic molecules, organic molecules, inorganic particles, and organic particles.

[0033] In some embodiments, the functional material 1012 includes at least one of an anti-glare material, an anti-static material, a depolarizing material, an anti-reflection material, a material for improving lateral view contrast, and an eye protection material.

[0034] In a specific embodiment, the functional material 1012 includes eye protection particles, and the eye protection particles include inorganic particles and / or organic particles.

[0035] In some embodiments, the glass transition temperature of the coating functional layer 10 is greater than or equal to -60°C and less than or equal to 160°C. For example, the glass transition temperature of the coating functional layer 10 can be -60°C, -40°C, -20°C, 0°C, 20°C, 40°C, 60°C, 80°C, 100°C, 120°C, 140°C, or 160°C.

[0036] In some embodiments, the elastic modulus of the coating functional layer 10 at 23°C is greater than or equal to 1 MPa and less than or equal to 5000 MPa. For example, the elastic modulus of the coating functional layer 10 at 23°C can be 1 MPa, 100 MPa, 200 MPa, 400 MPa, 500 MPa, 800 MPa, 1200 MPa, 1500 MPa, 2000 MPa, 2500 MPa, 3500 MPa, 4000 MPa, 4500 MPa, or 5000 MPa, etc.

[0037] In some embodiments, the pencil hardness of the coating functional layer 10 is greater than or equal to 1H / 500g. For example, the pencil hardness of the coating functional layer 10 can be H / 500g, 2H / 500g, 3H / 500g, 4H / 500g, 5H / 500g, 6H / 500g, 7H / 500g, 8H / 500g, 9H / 500g, 2H / 750g, H / 750g, etc. Controlling the hardness of the coating functional layer to be greater than or equal to 1H / 500g can provide better physical protection for the polarizing layer and endow it with certain abrasion resistance.

[0038] In some specific embodiments, the hardness of the coating functional layer 10 is 2H / 500g, 3H / 500g or 2H / 750g.

[0039] In the embodiments of the present application, the pencil hardness is obtained by referring to "GB / T 6739-2022 Paints and varnishes - Determination of film hardness by pencil test".

[0040] In some embodiments, the thickness of the coating functional layer 10 is greater than or equal to 10 microns and less than or equal to 50 microns. For example, the thickness of the coating functional layer 10 can be 10 microns, 20 microns, 30 microns, 40 microns or 50 microns, etc.

[0041] In the embodiments of the present application, the first functional layer 101 is prepared by a coating process.

[0042] In the embodiments of the present application, the coating methods include, but are not limited to, knife coating, spraying, slot die extrusion, lip coating, microgravure, etc.

[0043] In a specific embodiment, the first functional layer 101 is prepared by coating the raw materials of the first functional layer on the surface of the polarizing layer 30 using a coating process.

[0044] In a specific embodiment, a first adhesive layer prepolymer is coated on the surface of the polarizing layer 30, and then the raw materials of the first functional layer 101 are coated on the surface of the first adhesive layer prepolymer. After curing, the first adhesive layer 20 and the first functional layer 101 are obtained simultaneously.

[0045] In a specific embodiment, the first adhesive layer 20 is formed on the polarizing layer 30, and after coating the raw materials of the first functional layer 101 on the first adhesive layer 20 using a coating process, the first functional layer 101 is obtained.

[0046] In some embodiments, the material of the first functional layer 101 includes a leveling agent and other functional additives. The leveling agent includes at least one of siloxane, fluorine, and fluorocarbon.

[0047] It can be understood that the types of leveling agents can include, but are not limited to, the above materials.

[0048] In some embodiments, referring to Figures 3 to 5 , the coating functional layer 10 further includes a second functional layer 102, and the second functional layer 102 is disposed on a side of the first functional layer 101 away from the polarizing layer 30. The second functional layer 102 includes at least one of an anti-glare layer, an anti-static layer, a depolarizing layer, and a low-reflection layer.

[0049] In some embodiments, the second functional layer 102 includes a low-reflection layer 1022 and / or an anti-glare layer 1021, but is not limited thereto.

[0050] In a specific embodiment, the second functional layer 102 includes a low-reflection layer 1022, and the low-reflection layer 1022 is in direct contact with the first functional layer 101.

[0051] In a specific embodiment, the second functional layer 102 includes an anti-glare layer 1021, and the anti-glare layer 1021 is in direct contact with the first functional layer 101.

[0052] In a specific embodiment, the second functional layer 102 includes a low-reflection layer 1022 and an anti-glare layer 1021 which are stacked. The low-reflection layer 1022 is disposed on a side close to the first functional layer 101 and is in direct contact with the first functional layer 101. Of course, in other embodiments, the anti-glare layer 1021 is disposed on a side close to the first functional layer 101 and is in direct contact with the first functional layer 101.

[0053] In some embodiments, the in-plane retardation value (Re) of the compensating film 50 ranges from 0 nm to 500 nm; for example, Re can be 0 nm, 30 nm, 50 nm, 80 nm, 120 nm, 150 nm, 200 nm, 250 nm, 300 nm, etc.

[0054] In some embodiments, the thickness-direction retardation value (Rth) of the compensating film 50 ranges from 0 nm to 500 nm; for example, Rth can be 0 nm, 30 nm, 50 nm, 80 nm, 120 nm, 150 nm, 200 nm, 250 nm, 300 nm, etc.

[0055] In some embodiments, the compensating film 50 is fixedly connected to the polarizing layer 30 through the second adhesive layer 40.

[0056] In some embodiments, the thickness of the first adhesive layer 20 and / or the second adhesive layer 40 is 0.1 μm to 3 μm; for example, the thickness of the first adhesive layer 20 and the second adhesive layer 40 can be 0.1 μm, 0.2 μm, 0.3 μm, 0.4 μm, 0.5 μm, 0.6 μm, 0.7 μm, 0.8 μm, 0.9 μm, 1 μm, 2 μm, 3 μm, etc.

[0057] In some embodiments, the first adhesive layer 20 and / or the second adhesive layer 40 includes at least one of a water-based adhesive, a pressure-sensitive adhesive, and a radiation-curable adhesive.

[0058] It can be understood that, on the premise that the first adhesive layer 20 can fixedly connect the coating functional layer 10 and the polarizing layer 30, it can include but is not limited to the above materials; on the premise that the second adhesive layer 40 can fixedly connect the compensation film 50 and the polarizing layer 30, it can include but is not limited to the above materials.

[0059] In the embodiments of the present application, the water-based adhesive is a bonding material with natural polymer or synthetic polymer as the binder and water as the solvent or dispersant; in a specific embodiment, the water-based adhesive includes polyvinyl alcohol.

[0060] In the embodiments of the present application, the pressure-sensitive adhesive is a type of adhesive that can be pasted under slight pressure; in a specific embodiment, the pressure-sensitive adhesive includes an acrylate copolymer.

[0061] In the embodiments of the present application, the radiation-curable adhesive is an adhesive that is cured after being initiated by ultraviolet or radiation light. In a specific embodiment, the radiation-curable adhesive includes polyfunctional acrylate.

[0062] In some embodiments, the material of the compensation film 50 includes at least one of triacetyl cellulose (TAC), polyethylene terephthalate (PET), polycarbonate (PC), polymethyl methacrylate (PMMA), polycycloolefin (COP / COC), and polyethylene naphthalate (PEN).

[0063] It can be understood that, in the embodiments of the present application, the material of the compensation film 50 can include but is not limited to the above materials.

[0064] In the embodiments of the present application, the compensation film 50 is used to compensate for light leakage at large viewing angles of different types of liquid crystal display devices. Therefore, in some embodiments, the compensation film 50 is an isotropic optical film or an anisotropic optical film.

[0065] In some embodiments, the polarizing layer 30 includes an oriented polyvinyl alcohol matrix and a dye dispersed in the polyethylene matrix.

[0066] In some embodiments, the polarizing layer 30 is obtained by stretching and orienting and then impregnating with a dichroic dye.

[0067] In some embodiments, the dichroic dye is selected from inorganic dyes and / or organic dyes.

[0068] In some specific embodiments, the inorganic dye includes iodine and / or potassium iodide.

[0069] In some specific embodiments, the organic material selection includes at least one of anthraquinone dyes, azo dyes, triphenyl diazine and derivative dyes, monomethine and polymethine dyes, and heterocyclic dyes.

[0070] In some embodiments, referring to Figures 1 to 5 , the polarizer 100 further includes a pressure-sensitive adhesive layer 60, and the pressure-sensitive adhesive layer 60 is disposed on a side of the compensation film 50 away from the second adhesive layer 40.

[0071] In some embodiments, the material of the pressure-sensitive adhesive layer 60 includes an acrylate copolymer.

[0072] In some embodiments, the polarizer 100 further includes a release film 70, and the release film 70 is disposed on a side of the pressure-sensitive adhesive layer 60 away from the compensation film 50.

[0073] In some implementations, the thickness range of the release film is 20 μm to 100 μm. For example, the thickness of the release film can be 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, or 100 μm, etc.

[0074] In some embodiments, the release film 70 includes a release base layer and a release agent; the release base layer is directly connected to the pressure-sensitive adhesive layer 60; the release agent is in direct contact with a side of the release base layer away from the pressure-sensitive adhesive layer 60.

[0075] In some embodiments, the release film 70 is obtained by coating a release agent on the release base layer.

[0076] In the embodiments of the present application, the release agent is a chemical preparation for preventing the surfaces of objects from sticking to each other.

[0077] In a specific embodiment, the material of the release base layer includes polyethylene terephthalate (PET).

[0078] In some embodiments, the degree of polarization of the polarizer 100 is greater than or equal to 99%. For example, the degree of polarization of the polarizer can be 99.992, 99.991, 99.989, 99.50, 99.47, 99.990, or 99.49, etc.

[0079] In the embodiments of the present application, the degree of polarization of the polarizer 100 is tested with reference to the degree of polarization test method in "GB / T 25275-2010 Test Methods for Optical Properties and Weather Resistance of Polarizers for Liquid Crystal Displays (LCD)".

[0080] In some embodiments, the light transmittance of the polarizer 100 is greater than or equal to 40%. For example, the light transmittance can be 42.9, 42.5, 42.4, or 42.3, etc.

[0081] In an embodiment of the present application, the light transmittance of the polarizer 100 is tested with reference to the test method for light transmittance in "GB / T 25275-2010 Test Methods for Optical and Weather Resistance Properties of Polarizers for Liquid Crystal Displays (LCD)".

[0082] In a specific embodiment, referring to Figure 1 , the polarizer 100 includes a first functional layer 101, a first adhesive layer 20, a polarizing layer 30, a second adhesive layer 40, a compensation film 50, a pressure-sensitive adhesive layer 60, and a release film 70 that are sequentially stacked; the material of the polarizing layer 30 includes a polyvinyl alcohol matrix and a dichroic dye dispersed therein, thereby achieving the protection of the polarizing layer 30.

[0083] In a specific embodiment, referring to Figure 2 , the polarizer 100 includes a first functional layer 101, a first adhesive layer 20, a polarizing layer 30, a second adhesive layer 40, a compensation film 50, a pressure-sensitive adhesive layer 60, and a release film 70 that are sequentially stacked; the first functional layer 101 includes a coating layer 1011 and a functional material 1012, and the functional material includes eye protection particles, thereby achieving the eye protection function and the protection of the polarizing layer 30.

[0084] In a specific embodiment, referring to Figure 3 , the polarizer 100 includes an antiglare layer 1021, a first functional layer 101, a first adhesive layer 20, a polarizing layer 30, a second adhesive layer 40, a compensation film 50, a pressure-sensitive adhesive layer 60, and a release film 70 that are sequentially stacked; the material of the polarizing layer 30 includes a polyvinyl alcohol matrix and a dichroic dye dispersed therein; by providing the first functional layer 101 and the antiglare layer 1021 in the polarizer 100, the antiglare function and the protection of the polarizing layer 30 are achieved.

[0085] In a specific embodiment, referring to Figure 4 , the polarizer 100 includes a low-reflection layer 1022, a first functional layer 101, a first adhesive layer 20, a polarizing layer 30, a second adhesive layer 40, a compensation film 50, a pressure-sensitive adhesive layer 60, and a release film 70 that are sequentially stacked; the material of the polarizing layer 30 includes a polyvinyl alcohol matrix and a dichroic dye dispersed therein; by providing the first functional layer 101 and the low-reflection layer 1022 in the polarizer 100, the antireflection function and the protection of the polarizing layer 30 are achieved.

[0086] In a specific implementation, referring to Figure 5, the polarizer 100 includes a low-reflection layer 1022, an antiglare layer 1021, a first functional layer 101, a first adhesive layer 20, a polarizing layer 30, a second adhesive layer 40, a compensating film 50, a pressure-sensitive adhesive layer 60, and a release film 70 that are stacked in sequence. The material of the polarizing layer 30 includes a polyvinyl alcohol matrix and dichroic dyes dispersed therein. By providing the first functional layer 101, the low-reflection layer 1022, and the antiglare layer 1021 in the polarizer 100, an antireflection function, an antiglare function, and protection for the polarizing layer are achieved.

[0087] It can be understood that the polarizer 100 provided by the embodiments of the present application is not limited to the several types listed above. As shown in Table 1, the embodiments of the present application provide 5 types of polarizers through Embodiment 1 to Embodiment 5, and provide 2 types of comparative polarizers through Comparative Example 1 to Comparative Example 2.

[0088] Among them, the structure of the polarizer provided by Embodiment 1 is as Figure 1 shown, the structure of the polarizer provided by Embodiment 2 is as Figure 2 shown, the structure of the polarizer provided by Embodiment 3 is as Figure 3 shown, the structure of the polarizer provided by Embodiment 4 is as Figure 4 shown, the structure of the polarizer provided by Embodiment 5 is as Figure 5 shown; the structure of the polarizer provided by Comparative Example 1 is as Figure 6 shown. Compared with Embodiment 1, a TAC substrate is added between the first functional layer 101 and the first adhesive layer 20 in the polarizer provided by Comparative Example 1; the polarizer provided by Comparative Example 2 is as Figure 7 shown. Compared with Embodiment 4, a TAC substrate is added between the first functional layer 101 and the first adhesive layer 20 in the polarizer provided by Comparative Example 2.

[0089] Table 1 Materials and Thicknesses of Polarizing Layers and Adhesive Layers

[0090]

[0091] The performances of the polarizers provided by Embodiments 1 to 5 and Comparative Examples 1 to 2 are shown in Table 2.

[0092] Table 2 Performances of Polarizers Provided by Embodiments and Comparative Examples

[0093]

[0094]

[0095] As can be seen from the results in Table 2, compared with Comparative Examples 1-2, the polarizers of Examples 1-3 of the present application have a polarization degree of over 99% and a light transmittance of over 40% while the thickness is reduced, achieving the optimization of optical performance. At the same time, from the comparison between Example 1 and Comparative Example 1, and between Example 4 and Comparative Example 2, it can be seen that when the hardness and functions of the polarizers are the same, the polarization degree and light transmittance of the polarizer in Example 1 are both better than those in Comparative Example 1, and the polarization degree and light transmittance of the polarizer in Example 4 are both better than those in Comparative Example 2, and the thicknesses of Examples 1 and 4 are both reduced compared with Comparative Examples 1-2. It can be seen that when the functional layer is coated to replace the substrate, not only can the thickness of the polarizer be reduced, but also the polarization degree and light transmittance of the polarizer can be improved, achieving the optimization of optical performance.

[0096] Furthermore, by comparing Example 2 with Example 1, it can be known that when a functional material is added to the coating layer 1011, not only can function superposition be achieved, but also the excellent performance of the polarizer 100 can be maintained on the premise of unchanged thickness.

[0097] For the polarizer provided by the present application, by directly connecting the first functional layer 101 in the coating functional layer 10 to the polarizing layer 30 or connecting them through the first adhesive layer 20, it replaces the way of realizing support and physical protection of the traditional polarizer through the substrate 80. Since the manufacturing method of the coating functional layer 10 is simple, the manufacturing cost of the coating functional layer 10 is relatively low, and the light transmittance of the coating functional layer 10 is relatively high. Therefore, the present application uses the coating functional layer to replace the original substrate 80, reducing the manufacturing cost of the polarizer, reducing the overall thickness of the polarizer 100, and improving the light transmittance of the polarizer 100.

[0098] As Figure 8 shown, the embodiment of the present application also provides a display device A, which includes a display panel 200 and an upper polarizer 100a located on the light-emitting side of the display panel. The upper polarizer 100a is the polarizer 100 described in the foregoing embodiments. The coating functional layer 10 of the polarizer 100 is located on the side of the polarizing layer 30 away from the display panel 200.

[0099] In some embodiments, the display panel 200 is a liquid crystal display panel, and the display device A further includes a lower polarizer 100b located on the side of the display panel 200 opposite to the upper polarizer 100a.

[0100] In some embodiments, the lower polarizer 100b is the polarizer 100 described in the foregoing embodiments.

[0101] In some other embodiments, the lower polarizer 100b does not include the second functional layer 102.

[0102] In some embodiments, the display device A further includes a backlight module located on the side of the lower polarizer 100b facing away from the display panel 200. The structure of the backlight module is not limited in this application.

[0103] Of course, in other embodiments, the display panel 200 may also be an organic electroluminescent display panel, but is not limited thereto.

[0104] In the display device provided by this application, the first functional layer in the coating functional layer of the polarizer used is directly connected to the polarizing layer or connected through an adhesive layer, replacing the traditional way of using a substrate layer to achieve support and physical protection for the polarizer. Since the manufacturing method of the coating functional layer is simple, the manufacturing cost of the coating functional layer is relatively low, and the light transmittance of the coating functional layer is relatively high. Therefore, the display device using the above-mentioned polarizer reduces the manufacturing cost and the overall thickness, and also improves the display effect of the display device because the light transmittance of the polarizer is increased.

[0105] In the description of this application, the terms "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0106] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0107] The embodiments, implementation manners and related technical features of this application can be combined and replaced with each other without conflict.

[0108] The above are only the preferred embodiments of this application, and do not impose any form of limitation on this application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application still fall within the scope of the technical solution of this application.

Claims

1. A polarizer, characterized in that: The polarizer comprises: A polarizing layer, the polarizing layer comprising a light incident side and a light emitting side arranged opposite to each other; A coating functional layer is provided on the light-emitting side of the polarizing layer; Wherein, the coating functional layer includes a first functional layer, and the first functional layer is in direct contact with the light-emitting side of the polarizing layer, or the first functional layer is fixedly connected to the light-emitting side of the polarizing layer via an adhesive layer.

2. The polarizer according to claim 1, characterized in that: The first functional layer includes a coating layer and a functional material, wherein the functional material is distributed in the coating layer; the functional material includes at least one of inorganic molecules, organic molecules, inorganic particles and organic particles.

3. The polarizer according to claim 1, characterized in that: The coating functional layer further includes a second functional layer, which is disposed on a side of the first functional layer away from the polarizing layer, and includes at least one of an anti-glare layer, an antistatic layer, a depolarizing layer and a low-reflection layer.

4. The polarizer according to any one of claims 1 to 3, characterized in that: The glass transition temperature of the coating functional layer is greater than or equal to -60°C and less than or equal to 160°C.

5. The polarizer according to any one of claims 1 to 3, characterized in that: The elastic modulus of the coating functional layer at 23° C. is greater than or equal to 1 MPa and less than or equal to 5000 MPa.

6. The polarizer according to any one of claims 1 to 3, characterized in that: The pencil hardness of the coating functional layer is greater than or equal to 1H / 500g.

7. The polarizer according to any one of claims 1 to 3, characterized in that: The thickness of the coating functional layer is greater than or equal to 10 micrometers and less than or equal to 50 micrometers.

8. The polarizer according to claim 1, characterized in that: The polarizer further comprises a compensation film located on a side of the polarizing layer away from the coating functional layer, the in-plane retardation value of the compensation film ranges from 0 to 500 nanometers, and the thickness direction retardation value of the compensation film ranges from 0 to 500 nanometers.

9. The polarizer according to claim 1, characterized in that: The polarization degree of the polarizer is greater than or equal to 99%; and / or the light transmittance of the polarizer is greater than or equal to 40%.

10. A display device, characterized in that: It comprises a display panel and the polarizer according to any one of claims 1 to 9, wherein the polarizer is located on the light-emitting side of the display panel, and the coating functional layer is located on the side of the polarizer layer away from the display panel.

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