Polarizer and display panel

Abstract

The present application discloses a polarizer and a display panel. Diffusion particles are distributed in a diffusion layer. When the included angle between the extension direction of a first stretched side edge of the diffusion layer and the light absorption axis direction of a polarizing layer is a first angle or a second angle, a functional film layer correspondingly has a first haze or a second haze. The first angle is greater than or equal to 0° and less than 45°, the second angle is greater than 45° and less than or equal to 90°, and the first haze is greater than or equal to the second haze.

Description

Polarizing film and display panel Technical Field

[0001] This application relates to the field of display technology, and in particular to a polarizer and display panel. Background Technology

[0002] LCD monitors have high contrast and high transmittance, and are widely used in consumer electronics products such as televisions. However, the viewing angle of LCD monitors is not as good as that of self-emissive monitors.

[0003] To address the issue of narrow viewing angles, design solutions are often implemented within the LCD monitor itself. However, this approach is costly, complex, and offers limited improvement in viewing angle, failing to meet users' viewing needs. Invention Overview

[0004] This application provides a polarizer and a display panel that can amplify light, expand the viewing angle, and improve the display effect.

[0005] This application provides a polarizer, which includes a functional film layer, the functional film layer comprising:

[0006] Polarizing layer;

[0007] A diffusion layer is disposed on one side of the polarizing layer, and diffusion particles are distributed in the diffusion layer;

[0008] The diffusion layer has a first stretching side. When the angle between the extension direction of the first stretching side and the light absorption axis direction of the polarizing layer is a first angle, the functional film layer has a first haze. When the angle between the extension direction of the first stretching side and the light absorption axis direction of the polarizing layer is a second angle, the functional film layer has a second haze.

[0009] The first angle is greater than or equal to 0° and less than 45°, the second angle is greater than 45° and less than or equal to 90°, and the first haze is greater than or equal to the second haze.

[0010] In accordance with the above-mentioned objectives of this application, embodiments of this application also provide a display panel, the display panel comprising a panel body and a polarizer, the polarizer comprising a functional film layer, the functional film layer comprising:

[0011] Polarizing layer;

[0012] A diffusion layer is disposed on one side of the polarizing layer, and diffusion particles are distributed in the diffusion layer;

[0013] The diffusion layer has a first stretching side. When the angle between the extension direction of the first stretching side and the light absorption axis direction of the polarizing layer is a first angle, the functional film layer has a first haze. When the angle between the extension direction of the first stretching side and the light absorption axis direction of the polarizing layer is a second angle, the functional film layer has a second haze.

[0014] The first angle is greater than or equal to 0° and less than 45°, the second angle is greater than 45° and less than or equal to 90°, and the first haze is greater than or equal to the second haze. Attached Figure Description

[0015] Figure 1 is a schematic diagram of a polarizer provided in an embodiment of this application;

[0016] Figure 2 is a schematic diagram of a diffusion layer provided in an embodiment of this application;

[0017] Figure 3 is a schematic diagram of another structure of the diffusion layer provided in an embodiment of this application;

[0018] Figure 4 is a schematic diagram of a usage state structure of the display panel provided in an embodiment of this application;

[0019] Figure 5 is a schematic diagram of a display panel provided in an embodiment of this application;

[0020] Figure 6 is a schematic diagram of a display device provided in an embodiment of this application. Embodiments of the present invention

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0022] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0023] Referring to Figures 1, 2 and 3, this application provides a polarizer 10, which includes a functional film layer 11, comprising a polarizing layer 111 and a diffusion layer 112.

[0024] A diffusion layer 112 is disposed on one side of a polarizing layer 111, and diffusion particles 1122 are distributed in the diffusion layer 112. The diffusion layer 112 has a first stretching side 1123. When the angle between the extension direction of the first stretching side 1123 and the light absorption axis direction of the polarizing layer 111 is a first angle, the functional film layer 11 has a first haze. When the angle between the extension direction of the first stretching side 1123 and the light absorption axis direction of the polarizing layer 111 is a second angle, the functional film layer 11 has a second haze.

[0025] Furthermore, the first angle is greater than or equal to 0° and less than 45°, the second angle is greater than 45° and less than or equal to 90°, and the first haze is greater than or equal to the second haze.

[0026] In practical application, this embodiment of the application, by adding a diffusion layer 112 to the polarizer 10, and distributing diffusion particles 1122 in the diffusion layer 112, can effectively improve the light-diffusing effect of the diffusion layer 112, thereby enhancing the widening effect of the polarizer 10 on the viewing angle range and improving the viewing angle range of the display panel with the polarizer 10. Furthermore, in this embodiment of the application, when the angle between the extension direction of the first stretching side 1123 of the diffusion layer 112 and the light absorption axis direction of the polarizer 111 is a first angle, the functional film layer 11 has a first haze, and the extension direction of the first stretching side 1123 of the diffusion layer 112… When the angle between the polarizing layer 111 and the light absorption axis direction is a second angle, the functional film layer 11 has a second haze. The first angle is greater than or equal to 0° and less than 45°, the second angle is greater than 45° and less than or equal to 90°, and the first haze is greater than or equal to the second haze. The increase in the first haze is beneficial to the improvement of the viewing angle in the direction perpendicular to the first stretching side 1123. Therefore, this embodiment of the application increases the first haze to improve the viewing angle in the direction perpendicular to the first stretching side 1123. In this way, the position of the first stretching side 1123 can be set to better meet the user's viewing angle requirements.

[0027] In one embodiment of this application, the ratio of the first haze to the second haze is greater than or equal to 1 and less than or equal to 5.

[0028] In one embodiment of this application, the ratio of the first haze to the second haze is greater than or equal to 1 and less than or equal to 3.

[0029] In one embodiment of this application, the first angle is 0° and the second angle is 90°.

[0030] In one embodiment of this application, the first haze is greater than or equal to 20 and less than or equal to 100;

[0031] The second haze is greater than or equal to 5 and less than or equal to 80.

[0032] In one embodiment of this application, the haze of the diffusion layer is greater than or equal to 10 and less than or equal to 90.

[0033] In one embodiment of this application, the diffused particle has multiple cross sections, each cross section having an inscribed circle, and the ratio of the major axis length of the diffused particle to the diameter of the largest inscribed circle among the multiple inscribed circles is greater than or equal to 1 and less than or equal to 100.

[0034] In one embodiment of this application, when the ratio of the length of the major axis of the diffused particle to the diameter of the largest inscribed circle among the plurality of inscribed circles is greater than 1, the major axis of the diffused particle is arranged along the extension direction of the first stretching side.

[0035] In one embodiment of this application, the diameter of the inscribed circle is greater than or equal to 1 nm and less than or equal to 12.4 nm.

[0036] In one embodiment of this application, the diffusion layer includes a substrate and diffusion particles distributed in the substrate, wherein the content of the diffusion particles is 0.001% to 10% of the solid content of the substrate.

[0037] In one embodiment of this application, the material of the substrate includes at least one selected from polymethyl methacrylate, polyacrylate, polyethylene terephthalate, cellulose acetate, and polycarbonate.

[0038] In one embodiment of this application, the shape of the diffused particles is selected from at least one of spherical particles, rod-shaped particles, needle-shaped particles, cone-shaped particles, ellipsoidal particles, cube-shaped particles, and cuboid-shaped particles.

[0039] In one embodiment of this application, the first stretching side extends along the mechanical extension direction of the diffusion layer.

[0040] In one embodiment of this application, a stretching texture is formed in the diffusion layer, and the stretching texture extends in a direction parallel to the extension direction of the first stretching side.

[0041] In one embodiment of this application, the functional film layer further includes:

[0042] A compensation layer is disposed on the side of the polarizing layer away from the diffusion layer;

[0043] An adhesion layer is disposed on the side of the compensation layer away from the polarizing layer;

[0044] A surface coating is disposed on the side of the diffusion layer away from the polarizing layer.

[0045] In one embodiment of this application, the polarizer further includes a protective film and a release film disposed on opposite sides of the functional film layer, wherein the protective film is located on the side of the surface coating layer away from the diffusion layer, and the release film is located on the side of the adhesion layer away from the polarizing layer.

[0046] Specifically, referring to Figures 1, 2 and 3, the polarizer 10 provided in this embodiment includes a functional film layer 11, which has the functions of adjusting the direction of emitted light polarization and improving the viewing angle.

[0047] The functional film layer 11 includes a polarizing layer 111 and a diffusion layer 112 located on one side of the polarizing layer 111, and diffusion particles 1122 are distributed in the diffusion layer 112.

[0048] In one embodiment, the diffusion layer 112 includes a substrate layer 1121 disposed on one side of the polarizing layer 111 and diffusion particles 1122 distributed within the substrate layer 1121.

[0049] In one embodiment, the material of the substrate layer 1121 includes at least one selected from polymethyl methacrylate, polyacrylate, polyethylene terephthalate, cellulose acetate, and polycarbonate.

[0050] In one embodiment, the shape of the diffused particles 1122 is selected from at least one of spherical particles, rod-shaped particles, needle-shaped particles, cone-shaped particles, ellipsoidal particles, cubic particles, and cuboid particles; that is, there are multiple diffused particles 1122 distributed in the substrate layer 1121, and each diffused particle 1122 can be independently selected as one of spherical particles, rod-shaped particles, needle-shaped particles, cone-shaped particles, ellipsoidal particles, cubic particles, and cuboid particles; furthermore, the needle-shaped particles can be needle-shaped particles that gradually decrease in size at one end or needle-shaped particles that gradually decrease in size at both ends, and the cone-shaped particles can be long cone-shaped particles or double cone-shaped particles.

[0051] In one embodiment, the cross-sectional shape of the diffused particle 1122 may include regular or irregular shapes such as circles, ellipses, triangles, and quadrilaterals.

[0052] In one embodiment, the material of the diffusion particles 1122 can be at least one of inorganic materials, organic materials, or composite materials. For example, the material of the diffusion particles 1122 may include at least one of polysiloxane, polymethyl methacrylate, polystyrene, silicon dioxide, titanium dioxide, zirconium dioxide, silicon carbide, silicon nitride, zinc oxide, magnesium oxide, aluminum oxide, calcium sulfate, calcium carbonate, potassium titanate, and aluminum borate.

[0053] In one embodiment, the diffuse particles 1122 may undergo surface modification to improve their dispersion in the substrate layer 1121 or enhance their functionality, such as toughness. When the diffuse particles 1122 undergo surface modification, the surface of the diffuse particles 1122 is modified by at least one of inorganic cations, inorganic anions, polymers, coupling agents, or surfactants; that is, the surface of the diffuse particles 1122 includes at least one of inorganic cationic groups, inorganic anionic groups, polymer groups, coupling agent groups, or surfactant groups.

[0054] The surface of the diffusion particles 1122 is modified with at least one of the following: magnesium chloride, calcium chloride, barium chloride, strontium chloride, stearic acid, sodium stearate, zinc octadecanoate, sulfonic acid surfactants, thiocyanate surfactants, titanates, aluminates, polyacrylamide, silanes, alkyl phosphates, aryl phosphates, alkyl phosphates, aryl phosphates, alkylolamide phosphates, alkylolamide phosphates, imidazoline phosphates, imidazoline phosphates, polyphosphates, polyphosphates, and siloxane phosphates. Preferably, the surface of the diffusion particles 1122 is modified with at least one of the following: sulfonic acid surfactants or thiocyanate surfactants. The sulfonic acid surfactants may be selected from at least one of alkyl sulfonates and fluoroalkyl sulfonates, specifically, at least one of sodium dodecyl sulfonate, sodium dodecylbenzene sulfonate, and sodium fluorododecyl sulfonate; the thiocyanate surfactants may be selected from at least one of thiols and fluorothiols, specifically, at least one of octyl mercaptan, dodecyl mercaptan, tetradecyl mercaptan, octadecyl mercaptan, fluorooctyl mercaptan, and fluorododecyl mercaptan. When sulfonic acid surfactants are mixed with the diffusion particles 1122 to be surface modified, the sulfonic acid surfactant groups form a sulfonic acid shell on the whisker surface, such as a benzene ring sulfonic acid shell, which helps protect the diffusion particles 1122, enhances the toughness of the diffusion particles 1122, and reduces the breakage of the diffusion particles 1122 in the substrate layer 1121. When thiolated surfactant groups are mixed with the diffusion particles 1122 to be surface modified, the thiolated surfactant groups and the hydroxyl groups on the whisker surface form an OSO crosslinking network. The bond energy of OSO is relatively large, which helps protect the diffusion particles 1122 during the process of mixing the diffusion particles 1122 with the materials of the substrate layer 1121 and forming the diffusion particles 1122, reduces the breakage of the diffusion particles 1122, and enhances the effect of the diffusion particles 1122 on improving optical functions such as contrast and brightness. More preferably, the diffuser particles 1122 are derived from at least one of fluorinated sulfonic acid surfactants and fluorinated thiosurfactants, specifically, at least one of sodium fluorododecyl sulfonate, fluorooctyl mercaptan, and fluorododecyl mercaptan. The fluorine atom has high stability in the alkyl chain, the bond energy of the carbon-fluorine bond is higher than that of the carbon-carbon bond, and the carbon-fluorine bond has a shielding effect on the carbon-carbon bond, which is beneficial to protecting the carbon-carbon bond and thus improving the stability of the diffuser particles 1122.

[0055] Furthermore, the diffused particle 1122 has multiple cross sections, and each cross section has an inscribed circle, the diameter of which is greater than or equal to 1 nm and less than or equal to 12.4 nm; preferably, the diameter of the inscribed circle is greater than or equal to 1 nm and less than or equal to 5 nm; more preferably, the diameter of the inscribed circle is greater than or equal to 1.5 nm and less than or equal to 4 nm.

[0056] In one embodiment, the ratio of the major axis length of the diffused particle 1122 to the diameter of the largest inscribed circle among the plurality of inscribed circles is greater than or equal to 1 and less than or equal to 100; for example, the ratio can be 1, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, or 100, etc., and the above ratios are only examples and are not limited thereto.

[0057] In one embodiment, the content of diffused particles 1122 is 0.001% to 10% of the solid content of the substrate layer 1121; preferably, the content of diffused particles 1122 is 1% to 6% of the solid content of the substrate layer 1121; for example, it can be 1%, 2%, 3%, 4%, 5%, or 6%, etc., and the above values ​​are only examples and are not limited thereto.

[0058] In one embodiment, the shape of the diffusion layer 112 in a top view may include a circle, an ellipse, a triangle, a quadrilateral, other polygons, or an irregular shape.

[0059] In this embodiment of the application, the diffusion layer 112 has a first stretchable side 1123 and a second stretchable side 1124 disposed opposite to each other, and a third stretchable side 1125 and a fourth stretchable side 1126 disposed opposite to each other, wherein the third stretchable side 1125 and the fourth stretchable side 1126 are connected between the first stretchable side 1123 and the second stretchable side 1124.

[0060] In one embodiment, the first stretching side 1123 is parallel to the second stretching side 1124, and the third stretching side 1125 and the fourth stretching side 1126 are parallel; and in this embodiment, the shape of the diffusion layer 112 in the top view is rectangular as an example for illustration.

[0061] It should be noted that the extension direction of the first stretching side 1123 and the second stretching side 1124 can be either the machine direction (MD) or the transverse direction (TD), while the extension direction of the third stretching side 1125 and the fourth stretching side 1126 can be either the MD direction or the TD direction. In this embodiment, the extension direction of the first stretching side 1123 and the second stretching side 1124 is the MD direction, and the extension direction of the third stretching side 1125 and the fourth stretching side 1126 is the TD direction, as an example for illustration.

[0062] In one embodiment, when the ratio of the length of the major axis of the diffused particle 1122 to the diameter of the largest inscribed circle among the plurality of inscribed circles is greater than 1, the major axis of the diffused particle 1122 is arranged along the extension direction of the first stretching side 1123 or the second stretching side 1124.

[0063] Furthermore, in one embodiment, stretching lines are formed in the diffusion layer 112, and the extension direction of the stretching lines is parallel to the extension direction of the first stretched side 1123, that is, parallel to the MD direction. It should be noted that under a microscope, obvious lines can be seen in the diffusion layer 112, which are stretching lines. These stretching lines are generated during the stretching process of the diffusion layer 112 along the MD direction.

[0064] In this embodiment of the application, when the angle between the extension direction of the first stretching side 1123 or the second stretching side 1124 and the light absorption axis direction of the polarizing layer 111 is a first angle, the functional film layer 11 has a first haze; when the angle between the extension direction of the first stretching side 1123 or the second stretching side 1124 and the light absorption axis direction of the polarizing layer 111 is a second angle, the functional film layer 11 has a second haze.

[0065] Furthermore, the first angle is greater than or equal to 0° and less than 45°, the second angle is greater than 45° and less than or equal to 90°, and the first haze is greater than or equal to the second haze.

[0066] Specifically, when the angle between the extension direction of the first stretched side 1123 of the diffusion layer 112 and the absorption axis of the polarizing layer 111 is greater than or equal to 0° and less than 45°, increasing the haze is beneficial to improving the viewing angle in the direction from the first stretched side 1123 to the second stretched side 1124. When the angle between the extension direction of the first stretched side 1123 of the diffusion layer 112 and the absorption axis of the polarizing layer 111 is greater than 45° and less than or equal to 90°, increasing the haze is beneficial to improving the viewing angle in the direction from the third stretched side 1125 to the fourth stretched side 1126. For example, when the angle between the extension direction of the first stretched side 1123 of the diffusion layer 112 and the absorption axis of the polarizing layer 111 is greater than or equal to 0°, increasing the haze is beneficial to improving the viewing angle in the direction from the third stretched side 1125 to the fourth stretched side 1126. When the angle is 0° and less than 45°, the long axis of the diffuse particles 1122 is close to the direction of the absorption axis of the polarizing layer 111. The light transmitted through the polarizing layer 111 is perpendicular to the long axis of the diffuse particles 1122. Under the premise of the same number of particles, the diffuse particles 1122 will disperse more of the light transmitted through the polarizing layer 111 in the direction from the first stretching side 1123 to the second stretching side 1124, and thus the viewing angle from the first stretching side 1123 to the second stretching side 1124 will be larger. Therefore, in this embodiment, the first haze is greater than or equal to the second haze, and the viewing angle from the first stretching side 1123 to the second stretching side 1124 can be increased by increasing the first haze.

[0067] Furthermore, during the application process, the orientation of the polarizer 10 can be adjusted according to the requirements, so that the first stretching side 1123 points towards the second stretching side 1124 in the direction where a large viewing angle is required. For example, when the polarizer 10 is applied to display panels such as televisions and computers, the display panel is placed perpendicular to the horizontal plane. Then the first stretching side 1123 and the second stretching side 1124 can also be placed perpendicular to the horizontal plane, and the direction of the first stretching side 1123 pointing towards the second stretching side 1124 is parallel to the horizontal plane. This can improve the viewing angle of the display panel in the horizontal direction and improve the user's viewing effect.

[0068] For example, referring to Figures 1 and 4, the display panel 100 has a polarizer 10 provided in the embodiments of this application, and the polarizer 10 is placed perpendicular to the surface. The first stretching side 1123 and the second stretching side 1124 of the polarizer 10 are both perpendicular to the surface. The user 1001 can be located on one side of the display panel 100. At this time, the polarizer 10 provided in the embodiments of this application can increase the viewing angle of the direction from the first stretching side 1123 to the second stretching side 1124, thereby improving the viewing effect of the user 1001.

[0069] More preferably, the first angle is 0° and the second angle is 90°; when the first angle is 0°, the long axis of the diffuser 1122 is in the same direction as the absorption axis of the polarizing layer 111. At this time, the diffuser 1122 has the best light diffusion effect, and thus the best effect on improving the viewing angle.

[0070] It should be noted that in actual application, the angle between the absorption axis direction of the polarizing layer 111 and the extension direction of the first stretching side 1123 of the diffusion layer 112 is fixed, for example, it can be 0°. However, the first haze and the second haze defined in this application embodiment are respectively the first angle and the second angle between the extension direction of the first stretching side 1123 and the light absorption axis direction of the polarizing layer 111. Specifically, in the actual polarizing film 10 product, the polarizing layer 111 and the diffusion layer 112 can be separated, and then the angular relationship between the polarizing layer 111 and the diffusion layer 112 can be rotated. The haze relationship can be measured using a haze tester to verify whether it satisfies the condition that the first haze is greater than or equal to the second haze. Therefore, the polarizing film 10 structure with the first haze being greater than or equal to the second haze is within the scope of protection of this application.

[0071] As mentioned above, the polarizing layer 111 can be bonded to the diffusion layer 112 using water-based adhesive or UV adhesive. When the polarizing layer 111 and the diffusion layer 112 are bonded using water-based adhesive, the polarizer 10 can be soaked in water at 100°C for 30 minutes to separate the polarizing layer 111 and the diffusion layer 112. When the polarizing layer 111 and the diffusion layer 112 are bonded using UV adhesive, the polarizer 10 can be soaked in acetone solvent for 30 minutes to separate the polarizing layer 111 and the diffusion layer 112.

[0072] In one embodiment, the functional film layer 11 further includes a compensation layer 113, an adhesion layer 114, and a surface coating layer 115; wherein the compensation layer 113 is disposed on the side of the polarizing layer 111 away from the diffusion layer 112, the adhesion layer 114 is disposed on the side of the compensation layer 113 away from the polarizing layer 111, and the surface coating layer 115 is disposed on the side of the diffusion layer 112 away from the polarizing layer 111.

[0073] In one embodiment, the surface coating 115 may include at least one of the following: a transparent hardening sublayer, a low-reflection sublayer, an anti-reflection sublayer, an anti-fingerprint sublayer, an anti-static layer, an explosion-proof film, and a wear-resistant layer.

[0074] In one embodiment, the polarizer 10 further includes a protective film 13 and a release film 12 disposed on opposite sides of the functional film layer 11, wherein the protective film 13 is located on the side of the surface coating layer 115 away from the diffusion layer 112, and the release film 12 is located on the side of the adhesion layer 114 away from the polarizing layer 111; it is understood that the first haze and the second haze mentioned above are both haze of the functional film layer 11, while the protective film 13 and the release film 12 do not belong to the functional film layer 11.

[0075] Furthermore, embodiments 1 to 7 of this application are provided to verify the change in the angle between the extension direction of the first stretched side 1123 of the diffusion layer 112 in the polarizer 10 shown in FIG1 and the absorption axis direction of the polarizer 111.

[0076] In Example 1, rod-shaped particles are mixed into polyacrylic acid resin, and the rod-shaped particles account for 6% of the solid content of polyacrylic acid resin. The rod-shaped particles and polyacrylic acid resin are stirred evenly. The stirred rod-shaped particles and polyacrylic acid resin are added to an extruder. The film is formed by coating or by extrusion casting and stretching, wherein the casting and stretching direction is the MD direction.

[0077] Next, the film material obtained in the above steps is combined with the polarizing layer 111, the compensation layer 113, the adhesive layer 114 and the surface coating layer 115 to obtain the polarizer 10 shown in Figure 1.

[0078] In Example 2, rod-shaped particles are mixed into polyacrylic acid resin, and the rod-shaped particles account for 5% of the solid content of polyacrylic acid resin. The rod-shaped particles and polyacrylic acid resin are stirred evenly. The stirred rod-shaped particles and polyacrylic acid resin are added to an extruder. The film is formed by coating or by extrusion casting and stretching, wherein the casting and stretching direction is the MD direction.

[0079] Next, the film material obtained in the above steps is combined with the polarizing layer 111, the compensation layer 113, the adhesive layer 114 and the surface coating layer 115 to obtain the polarizer 10 shown in Figure 1.

[0080] In Example 3, rod-shaped particles are mixed into polyacrylic resin, and the rod-shaped particles account for 8% of the solid content of the polyacrylic resin. The rod-shaped particles and polyacrylic resin are stirred evenly. The stirred rod-shaped particles and polyacrylic resin are added to an extruder. The film is formed by coating or by extrusion casting and stretching, wherein the casting and stretching direction is the MD direction.

[0081] Next, the film material obtained in the above steps is combined with the polarizing layer 111, the compensation layer 113, the adhesive layer 114 and the surface coating layer 115 to obtain the polarizer 10 shown in Figure 1.

[0082] Example 4: Spherical particles are mixed into polymethyl methacrylate (PMMA), with the spherical particles accounting for 1% of the PMMA solid content. The spherical particles and PMMA are stirred evenly. The stirred spherical particles and PMMA are added to an extruder. The film is formed by coating or by extrusion casting and stretching, wherein the casting and stretching direction is the MD direction.

[0083] Next, the film material obtained in the above steps is combined with the polarizing layer 111, the compensation layer 113, the adhesive layer 114 and the surface coating layer 115 to obtain the polarizer 10 shown in Figure 1.

[0084] Example 5: Spherical particles are mixed into polymethyl methacrylate (PMMA), with the spherical particles accounting for 0.5% of the PMMA solid content. The spherical particles and PMMA are stirred evenly. The evenly stirred spherical particles and PMMA are added to an extruder. The film is formed by coating or by extrusion casting and stretching, wherein the casting and stretching direction is the MD direction.

[0085] Next, the film material obtained in the above steps is combined with the polarizing layer 111, the compensation layer 113, the adhesive layer 114 and the surface coating layer 115 to obtain the polarizer 10 shown in Figure 1.

[0086] In Example 6, bulk particles were mixed into polyethylene terephthalate (PET), with the bulk particles accounting for 0.5% of the PET solid content. The bulk particles and PET were then stirred until homogeneous. The homogeneous bulk particles and PET were added to an extruder. The film was formed by coating or by extrusion casting and stretching, wherein the casting and stretching direction is the MD direction, and the bulk particles include cubic particles and cuboid particles.

[0087] Next, the film material obtained in the above steps is combined with the polarizing layer 111, the compensation layer 113, the adhesive layer 114 and the surface coating layer 115 to obtain the polarizer 10 shown in Figure 1.

[0088] In Example 7, bulk particles were mixed into polyethylene terephthalate (PET), with the bulk particles accounting for 1% of the PET solid content. The bulk particles and PET were then stirred until homogeneous. The homogeneous bulk particles and PET were added to an extruder. The film was formed by coating or by extrusion casting and stretching, wherein the casting and stretching direction is the MD direction, and the bulk particles include cubic particles and cuboid particles.

[0089] Next, the film material obtained in the above steps is combined with the polarizing layer 111, the compensation layer 113, the adhesive layer 114 and the surface coating layer 115 to obtain the polarizer 10 shown in Figure 1.

[0090] It should be noted that, except for the diffusion layer 112, all other film layers in the above embodiments 1 to 7 are the same, and the data shown in Table 1 below have been verified.

[0091] Table 1. Relationship between Angle and Haze

[0092]

[0093] As can be seen from Table 1 above, in this embodiment of the application, making the first haze greater than or equal to the second haze can effectively improve the viewing angle of the display panel with the polarizer 10 provided in this embodiment of the application, and improve the display effect.

[0094] In one embodiment, the ratio of the first haze to the second haze is greater than or equal to 1 and less than or equal to 5. For example, it can be 1, 2, 3, 4, or 5. The above ratio is only an example and is not limited thereto.

[0095] In one embodiment, the first haze is greater than or equal to 20 and less than or equal to 100; the second haze is greater than or equal to 5 and less than or equal to 80.

[0096] In one embodiment, the haze of the diffusion layer 112 is greater than or equal to 10 and less than or equal to 90.

[0097] Furthermore, in one embodiment, the ratio of the first haze to the second haze is greater than or equal to 1 and less than or equal to 3.

[0098] In summary, by adding a diffusion layer 112 to the polarizer 10, and distributing diffusion particles 1122 in the diffusion layer 112, the light-diffusing effect of the diffusion layer 112 can be effectively improved, thereby enhancing the widening effect of the polarizer 10 on the viewing angle range and increasing the viewing angle range of the display panel with the polarizer 10. Furthermore, in this embodiment, when the angle between the extension direction of the first stretching side 1123 or the extension direction of the second stretching side 1124 of the diffusion layer 112 and the light absorption axis direction of the polarizer 111 is a first angle, the functional film layer 11 has a first haze. When the angle between the polarizing layer 111 and the light absorption axis is a second angle, the functional film layer 11 has a second haze. The first angle is greater than or equal to 0° and less than 45°, the second angle is greater than 45° and less than or equal to 90°, and the first haze is greater than or equal to the second haze. The increase in the first haze is beneficial to the improvement of the viewing angle in the direction from the first stretching side 1123 to the second stretching side 1124. Therefore, this embodiment of the application increases the first haze to improve the viewing angle in the direction from the first stretching side 1123 to the second stretching side 1124. Furthermore, by setting the positions of the first stretching side 1123 and the second stretching side 1124, it can better meet the user's viewing angle requirements.

[0099] In addition, referring to Figures 1 and 5, this application embodiment also provides a display panel 100, which includes a panel body 20 and the polarizer 10 described in the above embodiments.

[0100] The polarizer 10 is located on the light-emitting side of the panel body 20. In the polarizer 10, the diffusion layer 112 is located on the side of the polarizer 111 away from the panel body 20. The light emitted by the panel body 20 first passes through the polarizer 111 and then reaches the diffusion layer 112.

[0101] In one embodiment, the display panel 100 further includes an opposing polarizer 30 disposed on the side of the panel body 20 away from the polarizer 10; and the panel body 20 can be a liquid crystal panel, the panel body 20 including an array substrate and a color filter substrate disposed opposite to each other, and a liquid crystal layer located between the array substrate and the color filter substrate.

[0102] It is understood that since the display panel 100 includes the polarizer 10 described in the above embodiments, the display panel 100 has the same beneficial effects as the polarizer 10 in the above embodiments, that is, the embodiments of this application can effectively improve the viewing angle range of the display panel 100; wherein, when the display panel is used for display, it includes top and bottom edges and left and right edges, which can make the first stretching side 1123 or the second stretching side 1124 of the diffusion layer 112 in the polarizer 10 parallel to the left and right edges of the display panel respectively, thereby increasing the viewing angle of the display panel in the left-right direction and improving the display effect of the display panel.

[0103] Additionally, referring to FIG6, this application embodiment also provides a display device 200, which includes a display panel 100 as described in the above embodiments.

[0104] It is understood that since the display device 200 includes the display panel 100 described in the above embodiments, the display device 200 has the same beneficial effects as the display panel 100 in the above embodiments, that is, the embodiments of this application can effectively improve the viewing angle range of the display device 200.

[0105] In one embodiment, the display device 200 may include a mobile phone, computer, television, or tablet computer, or other display devices.

[0106] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0107] The polarizer and display panel provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A polarizing sheet comprising a functional film layer, the functional film layer comprising: a polarizing layer; a diffusion layer disposed on one side of the polarizing layer, the diffusion layer having diffusion particles distributed therein; wherein the diffusion layer has a first stretched side edge, the functional film layer has a first haze when an included angle between an extension direction of the first stretched side edge and a light absorption axis direction of the polarizing layer is a first angle, and the functional film layer has a second haze when the included angle between the extension direction of the first stretched side edge and the light absorption axis direction of the polarizing layer is a second angle; the first angle is greater than or equal to 0° and less than 45°, the second angle is greater than 45° and less than or equal to 90°, and the first haze is greater than or equal to the second haze. a ratio of the first haze to the second haze is greater than or equal to 1 and less than or equal to 5. a ratio of the first haze to the second haze is greater than or equal to 1 and less than or equal to 3. the first angle is 0° and the second angle is 90°. the first haze is greater than or equal to 20 and less than or equal to 100; the second haze is greater than or equal to 5 and less than or equal to 80. a haze of the diffusion layer is greater than or equal to 10 and less than or equal to 90. the diffusion particles have a plurality of cross sections, each of the cross sections has an inscribed circle, and a ratio of a long axis length of the diffusion particles to a diameter of the inscribed circle having a largest diameter among the inscribed circles is greater than or equal to 1 and less than or equal to 100. when the ratio of the long axis length of the diffusion particles to the diameter of the inscribed circle having the largest diameter among the inscribed circles is greater than 1, the long axis of the diffusion particles is arranged along the extension direction of the first stretched side edge. a diameter of the inscribed circle is greater than or equal to 1 nm and less than or equal to 12.4 nm. the diffusion layer comprises a substrate and the diffusion particles distributed in the substrate, and a content of the diffusion particles is 0.001% to 10% of a solid content of the substrate. a material of the substrate comprises at least one of polymethyl methacrylate, polyacrylate, polyethylene terephthalate, cellulose acetate, and polycarbonate. a shape of the diffusion particles is selected from at least one of a spherical particle, a rod-shaped particle, a needle-shaped particle, a cone-shaped particle, an ellipsoidal particle, a cubic particle, and a cuboid particle. the first stretched side edge extends along a mechanical extension direction of the diffusion layer. a stretch mark is formed in the diffusion layer, and an extension direction of the stretch mark is parallel to the extension direction of the first stretched side edge. the functional film layer further comprises: a compensation layer disposed on a side of the polarizing layer distal to the diffusion layer; an adhesion layer disposed on a side of the compensation layer distal to the polarizing layer; and a surface coating layer disposed on a side of the diffusion layer distal to the polarizing layer. the polarizing sheet further comprises protective films and a release film disposed on opposite sides of the functional film layer, and the protective film is located on a side of the surface coating layer distal to the diffusion layer, and the release film is located on a side of the adhesion layer distal to the polarizing layer. ​ ​ ​ ​ 2. The polarizing sheet according to claim 1, wherein ​ 3. The polarizing sheet according to claim 1, wherein ​ 4. The polarizing plate according to any one of claims 1 to 3, wherein ​ 5. The polarizing plate according to any one of claims 1 to 3, wherein ​ ​ 6. The polarizing plate according to any one of claims 1 to 3, wherein ​ 7. The polarizing sheet according to claim 1, wherein ​ 8. The polarizing sheet according to claim 7, wherein ​ 9. The polarizing sheet according to claim 7, wherein ​ 10. The polarizing sheet according to claim 1, wherein ​ 11. The polarizing sheet according to claim 10, wherein ​ 12. The polarizing sheet according to claim 1, wherein ​ 13. The polarizing sheet according to claim 1, wherein ​ 14. The polarizing sheet according to claim 13, wherein ​ 15. The polarizing sheet according to claim 1, wherein ​ ​ ​ ​ 16. The polarizing sheet according to claim 15, wherein ​ 17.A display panel, comprising a panel body and a polarizer, the polarizer comprising a functional film layer, the functional film layer comprising: a polarizing layer; a diffusion layer disposed on one side of the polarizing layer, the diffusion layer having diffusion particles distributed therein; wherein the diffusion layer has a first stretched side edge, when an included angle between an extension direction of the first stretched side edge and a light absorption axis direction of the polarizing layer is a first angle, the functional film layer has a first haze, and when the included angle between the extension direction of the first stretched side edge and the light absorption axis direction of the polarizing layer is a second angle, the functional film layer has a second haze; the first angle is greater than or equal to 0° and less than 45°, the second angle is greater than 45° and less than or equal to 90°, and the first haze is greater than or equal to the second haze.

18. The display panel of claim 17, wherein, a ratio of the first haze to the second haze is greater than or equal to 1 and less than or equal to 5.

19. The display panel of claim 17, wherein, the first stretched side edge extends along a mechanical extension direction of the diffusion layer.

20. The display panel of claim 19, wherein, the diffusion layer has a stretch mark formed therein, and an extension direction of the stretch mark is parallel to the extension direction of the first stretched side edge.

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