Polarizer, manufacturing method thereof and display module

Abstract

The invention relates to a polaroid, a manufacturing method thereof and a display module. The polaroid comprises a base material layer and a polarizing layer. The polarizing layer is arranged on the base material layer; wherein the base material layer contains a cross-linked network structure formed by a polymer material, and the cross-linking density of the polymer material is greater than or equal to 10 mol / m < 3 > and less than or equal to 105 mol / m < 3 >; according to the polaroid, the hardness of the base material layer can be increased, the hardness of the polaroid is effectively improved, the probability that the polaroid is scratched can be reduced, the service life of the polaroid is prolonged, and the display effect of the display module with the polaroid is improved; in addition, a hardening coating does not need to be additionally arranged, so that the process can be simplified, and the cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a polarizer, a manufacturing method thereof, and a display module. Background Art

[0002] A liquid crystal display (LCD) is a flat, ultra-thin display device composed of a certain number of color or black-and-white pixels, placed in front of a light source or reflective surface. LCDs are highly sought after for their low power consumption, high image quality, compact size, and light weight, making them a popular display. A commonly used LCD panel consists of at least a thin-film transistor array substrate (TFT array substrate) and a color filter substrate positioned opposite each other, along with a liquid crystal layer positioned between the TFT array substrate and the color filter substrate. The TFT array substrate and the color filter substrate are also laminated with a lower polarizer and an upper polarizer, respectively.

[0003] The liquid crystal display panel also includes a backlight assembly, and the lower polarizer is located between the backlight assembly and the display panel. Currently, in order to achieve an ultra-thin display module structure, the distance between the diaphragm in the backlight assembly and the lower polarizer is reduced, causing the lower polarizer to be scratched by the diaphragm in the backlight assembly, which in turn affects the display quality. Summary of the Invention

[0004] The embodiments of the present application provide a polarizer, a method for manufacturing the same, and a display module, which can improve the hardness of the polarizer, simplify the process, and reduce costs.

[0005] The embodiment of the present application provides a polarizer, comprising:

[0006] substrate layer;

[0007] a polarizing layer, disposed on the substrate layer;

[0008] The substrate layer contains a cross-linked network structure formed by a polymer material, and the cross-linking density of the polymer material is greater than or equal to 10 mol / m 3 , and less than or equal to 10 5 mol / m 3 .

[0009] In one embodiment of the present application, the pencil hardness of the substrate layer ranges from 1B to 10B.

[0010] In one embodiment of the present application, the polymer material includes at least one of polyethylene terephthalate, cellulose triacetate, carbonate, polymethyl methacrylate, and cycloolefin polymer.

[0011] In accordance with the above-mentioned purpose of the present application, an embodiment of the present application further provides a method for manufacturing a polarizer, which comprises the following steps:

[0012] A substrate layer is formed, wherein the substrate layer comprises a cross-linked network structure formed by a polymer material, and the cross-linking density of the polymer material is greater than or equal to 10 mol / m 3 , and less than or equal to 10 5 mol / m 3 ;

[0013] A polarizing layer is formed on one side of the substrate layer.

[0014] In one embodiment of the present application, the step of forming the substrate layer includes:

[0015] Radiation-modifying the polymer material, wherein the polymer material comprises at least one of polyethylene terephthalate, cellulose triacetate, carbonate, polymethyl methacrylate, and cycloolefin polymer;

[0016] The modified polymer material is used to form the substrate layer.

[0017] In one embodiment of the present application, the step of radiation-modifying the polymer material comprises:

[0018] The polymer material is modified by electron beam or gamma ray.

[0019] According to the above-mentioned purpose of the present application, an embodiment of the present application further provides a display module, which includes a display panel and a polarizer attached to one side of the display panel, and the polarizer is the above-mentioned polarizer, or the polarizer is made using the above-mentioned polarizer manufacturing method.

[0020] In one embodiment of the present application, the display module further includes a backlight assembly, and the display panel is located on the light-emitting side of the backlight assembly, the polarizer is located between the display panel and the backlight assembly, and the substrate layer is located between the polarizing layer and the backlight assembly.

[0021] In one embodiment of the present application, the display module further includes an opposing polarizer, the opposing polarizer being located on a side of the display panel away from the backlight assembly, and the opposing polarizer includes:

[0022] Opposed polarized subject;

[0023] The hardening layer is arranged on one side of the opposite polarizing body.

[0024] In one embodiment of the present application, the hardness of the hardened layer is greater than the hardness of the base material layer.

[0025] The present application provides a polarizer, a method for manufacturing the same, and a display module. By increasing the cross-linking density of the cross-linked network structure of the substrate layer in the polarizer, the hardness of the substrate layer can be increased, thereby effectively improving the hardness of the polarizer, reducing the probability of the polarizer being scratched, increasing the service life of the polarizer, and improving the display effect of the display module having the polarizer. In addition, the present application does not require the additional provision of a hardening coating, thereby simplifying the process and reducing costs.

[0026] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0028] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same drawing numbers represent the same parts in the following description.

[0029] Figure 1 A schematic structural diagram of a polarizer provided in an embodiment of the present application;

[0030] Figure 2 A flow chart of a method for manufacturing a polarizer provided in an embodiment of the present application;

[0031] Figure 3 A schematic structural diagram of a display module provided in an embodiment of the present application.

[0032] Description of reference numerals:

[0033] 10. Polarizer; 11. Base material layer; 12. Polarizing layer; 13. Compensation layer; 14. Adhesive layer; 15. Protective film; 16. Release film; 20. Display panel; 21. Array substrate; 22. Color filter substrate; 30. Backlight assembly; 40. Opposing polarizer; 41. Opposing polarizing body; 42. Hardening layer. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0035] Please refer to Figure 1 , an embodiment of the present application provides a polarizer, wherein the polarizer 10 includes a substrate layer 11 and a polarizing layer 12 ; the polarizing layer 12 is disposed on the substrate layer 11 .

[0036] The substrate layer 11 contains a cross-linked network structure formed by a polymer material, and the cross-linking density of the polymer material is greater than or equal to 10 mol / m 3 , and less than or equal to 10 5 mol / m 3 .

[0037] During the implementation and application process, the embodiment of the present application increases the cross-linking density of the cross-linked network structure of the substrate layer 11 in the polarizer 10, thereby increasing the hardness of the substrate layer 11, effectively improving the hardness of the polarizer 10, reducing the probability of the polarizer 10 being scratched, increasing the service life of the polarizer 10, and improving the display effect of the display module having the polarizer 10; in addition, the present application does not require the additional addition of a hardening coating, thereby simplifying the process and reducing costs.

[0038] For details, please refer to Figure 1 An embodiment of the present application provides a polarizer 10 , which includes a substrate layer 11 and a polarizing layer 12 disposed on the substrate layer 11 .

[0039] In some embodiments, the polarizing layer 12 may be made of polyvinyl alcohol (PVA), and the polarizing layer 12 may be stretched and dyed to impart polarization properties. This allows the polarizing layer 12 to selectively absorb light vibrations in a certain direction, allowing only light aligned with the molecular chain alignment to pass through, thereby achieving a polarization effect.

[0040] In some embodiments, the polarizer 10 may further include a compensation layer 13 . The compensation layer 13 may be disposed on a side of the polarizing layer 12 away from the substrate layer 11 .

[0041] It is understood that the compensation layer 13 can be an optical film used to adjust optical phase retardation, primarily to improve the viewing angle, contrast, and color performance of the display module. Its core function is to adjust the phase difference between light with different polarization directions through the birefringence effect, thereby optimizing the display effect. For example, in a VA-type liquid crystal display module, the compensation layer 13 has an R0 (in-plane retardation) value of 40-65 and an Rth (thickness-wise retardation) value of 100-160. In IPS / FFS-type liquid crystal display modes, the R0 / Rth value of the compensation layer 13 can be close to 0.

[0042] In some embodiments, the material of the compensation layer 13 may include at least one of cycloolefin polymer, polycarbonate, triacetyl cellulose, and polymethyl methacrylate.

[0043] In some embodiments, the polarizer 10 further includes an adhesive layer 14 , and the adhesive layer 14 may be disposed on a side of the compensation layer 13 away from the polarizing layer 12 .

[0044] In some embodiments, the adhesive layer 14 can be used to bond the polarizer 10 to other structures, such as bonding the polarizer 10 to a display panel, etc. The adhesive layer 14 can be made of at least one of an acrylic resin, a silicone resin, and a polyurethane resin.

[0045] Furthermore, the polarizer 10 also includes a protective film 15 arranged on the side of the substrate layer 11 away from the polarizing layer 12 and a release film 16 arranged on the side of the adhesive layer 14 away from the compensation layer 13; it can be understood that the protective film 15 and the release film 16 will be removed during the use of the polarizer 10, for example, when the polarizer 10 is bonded to the display panel, the protective film 15 and the release film 16 will be removed.

[0046] In the embodiment of the present application, the crosslinking density of the polymer material in the substrate layer 11 may be greater than or equal to 10 mol / m 3 , and less than or equal to 10 5 mol / m 3 ; For example, it can be 10mol / m 3 , 10 2 mol / m 3 , 10 3 mol / m 3 , 10 4 mol / m 3 or 10 5 mol / m 3 .

[0047] Furthermore, compared with the related art, the substrate is usually prepared by using an organic resin material, which has good flexibility but insufficient hardness; therefore, the embodiment of the present application can increase the hardness of the substrate layer 11 by increasing the crosslinking density of the substrate layer 11, thereby increasing the hardness of the polarizer 10, reducing the probability of the polarizer 10 being scratched, increasing the service life of the polarizer 10, and improving the display effect of the display module having the polarizer 10; in addition, the present application does not require the additional addition of a hardening coating, thereby simplifying the process and reducing costs.

[0048] It should be noted that in the embodiments of the present application, the crosslinking density of the polymer material can be determined by measuring the elastic modulus (E) through a tensile test or dynamic mechanical analysis (DMA), and the crosslinking density formula is as follows:

[0049] v = E / 3RT;

[0050] Wherein, E is elastic modulus (Pa); R is gas constant 8.314 J / (mol*K); and T is absolute temperature (K).

[0051] In some embodiments, the pencil hardness of the substrate layer ranges from 1B to 10B; for example, the pencil hardness of the substrate layer 11 may be 10B, 9B, 8B, 7B, 6B, 5B, 4B, 3B, 2B, or 1B.

[0052] In some embodiments, the polymer material in the substrate layer 11 includes at least one of polyethylene terephthalate, triacetyl cellulose, carbonate, polymethyl methacrylate and cycloolefin polymer; it should be noted that the embodiment of the present application can modify the polymer material of the substrate layer 11 to increase the cross-linking density of the polymer material to form a cross-linked network structure, thereby making the polymer material have a higher cross-linking density.

[0053] In some embodiments, the crosslinking density of the modified polyethylene terephthalate can be greater than or equal to 10 2 mol / m 3 , and less than or equal to 10 4 mol / m 3 The crosslinking density of the modified cellulose triacetate can be greater than or equal to 10 mol / m 3 , and less than or equal to 10 4 mol / m 3 ; The crosslinking density of the modified carbonate can be greater than or equal to 10 2 mol / m 3 , and less than or equal to 10 5 mol / m 3 The crosslinking density of the modified polymethyl methacrylate can be greater than or equal to 10 2 mol / m 3 , and less than or equal to 10 4 mol / m 3 The crosslinking density of the modified cycloolefin polymer can be greater than or equal to 10 2 mol / m 3 , and less than or equal to 10 4 mol / m 3 .

[0054] In some embodiments, the method of radiation modification of the polymer material may include radiation modification, such as using an electron beam or gamma rays to modify the polymer material; thereby, new chemical bonds can be formed, so that molecular chains that were originally not connected or cross-linked together are connected or cross-linked together to form a cross-linked network structure, thereby effectively increasing the cross-linking density of the polymer.

[0055] In some embodiments, the chemical bonds of the polymer material may include CH bonds, CC bonds, CO bonds, ester groups (C=O), carbonate groups (O=C=O), and the like.

[0056] In addition, please combine Figure 1 as well as Figure 2 The present application also provides a method for manufacturing the polarizer 10 described in the above embodiment. The method for manufacturing the polarizer 10 includes the following steps:

[0057] A substrate layer 11 is formed, and the substrate layer 11 contains a cross-linked network structure formed by a polymer material, and the cross-linking density of the polymer material is greater than or equal to 10 mol / m 3 , and less than or equal to 10 5 mol / m 3 ;

[0058] A polarizing layer 12 is formed on one side of the base layer 11 .

[0059] The embodiment of the present application increases the cross-linking density of the substrate layer 11 in the polarizer 10, thereby increasing the hardness of the substrate layer 11, effectively improving the hardness of the polarizer 10, reducing the probability of the polarizer 10 being scratched, increasing the service life of the polarizer 10, and improving the display effect of the display module having the polarizer 10; in addition, the present application does not require the additional addition of a hardening coating, thereby simplifying the process and reducing costs.

[0060] Specifically, the method for manufacturing the polarizer 10 includes the following steps:

[0061] S10, forming a substrate layer 11, wherein the substrate layer 11 comprises a cross-linked network structure formed by a polymer material, and the cross-linking density of the polymer material is greater than or equal to 10 mol / m 3 , and less than or equal to 10 5 mol / m 3 .

[0062] In step S10 , a polymer material is provided, wherein the polymer material includes at least one of polyethylene terephthalate, cellulose triacetate, carbonate, polymethyl methacrylate, and cycloolefin polymer.

[0063] The polymer material is radiation modified.

[0064] In some embodiments, the method of modifying the polymer material may include radiation modification, such as using an electron beam or gamma ray to modify the polymer material; thereby, new chemical bonds can be formed, so that molecular chains that were originally not connected or cross-linked together are connected or cross-linked together to form a cross-linked network structure, thereby effectively increasing the cross-linking density of the polymer.

[0065] In some embodiments, the electron beam can be an electron beam released by an industrial electron accelerator or a laboratory electron accelerator, with an irradiation dose of 30-400 kGy and a dose rate of 20-80,000 kGy h-1; the gamma rays can mainly come from radiation sources such as cobalt-60 and cesium-137, with an irradiation dose of 5-100 kGy and a dose rate of 120-35,000 Gy h-1.

[0066] It should be noted that during the modification process, a higher dose rate generally achieves faster material modification, but it is important to avoid excessive dose rates that could damage the structure. Furthermore, different materials have varying sensitivities to radiation, so the dose rate needs to be adjusted based on the material's characteristics.

[0067] In some embodiments, the chemical bonds of the polymer material may include CH bonds, CC bonds, CO bonds, ester groups (C=O), carbonate groups (O=C=O), and the like.

[0068] In some embodiments, the polymer material includes at least one of polyethylene terephthalate, triacetyl cellulose, carbonate, polymethyl methacrylate and cycloolefin polymer; it should be noted that the embodiment of the present application can modify the polymer material of the substrate layer 11 to increase the cross-linking density of the polymer material to form the polymer material having a cross-linked network structure, thereby making the polymer material have a higher cross-linking density.

[0069] The modified polymer material is used to form the substrate layer 11 .

[0070] In the embodiment of the present application, the substrate layer 11 contains a cross-linked network structure formed by a polymer material, and the cross-linking density of the polymer material is greater than or equal to 10 mol / m 3 , and less than or equal to 10 5 mol / m 3; Furthermore, compared with the related art, the substrate is usually prepared by organic resin material, which has good flexibility and insufficient hardness; therefore, the embodiment of the present application can increase the hardness of the substrate layer 11 by increasing the cross-linking density of the substrate layer 11, thereby increasing the hardness of the polarizer 10, reducing the probability of the polarizer 10 being scratched, increasing the service life of the polarizer 10, and improving the display effect of the display module having the polarizer 10; in addition, the present application does not require the additional addition of a hardening coating, thereby simplifying the process and reducing costs.

[0071] In some embodiments, the pencil hardness of the substrate layer ranges from 1B to 10B; for example, the pencil hardness of the substrate layer 11 may be 10B, 9B, 8B, 7B, 6B, 5B, 4B, 3B, 2B, or 1B.

[0072] S20 , forming a polarizing layer 12 on one side of the substrate layer 11 .

[0073] In step S20 , the resin material may be subjected to processes such as washing, swelling, dyeing, stretching, color fixing, and drying to obtain the polarizing layer 12 .

[0074] In some embodiments, the polarizing layer 12 may be made of polyvinyl alcohol (PVA), and the polarizing layer 12 may be stretched and dyed to impart polarization properties. This allows the polarizing layer 12 to selectively absorb light vibrations in a certain direction, allowing only light aligned with the molecular chain alignment to pass through, thereby achieving a polarization effect.

[0075] Furthermore, a compensation layer 13 may be formed.

[0076] It is understood that the compensation layer 13 can be an optical film used to adjust optical phase retardation, primarily to improve the viewing angle, contrast, and color performance of the display module. Its core function is to adjust the phase difference between light with different polarization directions through the birefringence effect, thereby optimizing the display effect. For example, in a VA-type liquid crystal display module, the compensation layer 13 has an R0 (in-plane retardation) value of 40-65 and an Rth (thickness-wise retardation) value of 100-160. In IPS / FFS-type liquid crystal display modes, the R0 / Rth value of the compensation layer 13 can be close to 0.

[0077] In some embodiments, the material of the compensation layer 13 may include at least one of cycloolefin polymer, polycarbonate, triacetyl cellulose, and polymethyl methacrylate.

[0078] The substrate layer 11 , the polarizing layer 12 , and the compensation layer 13 may be composited into three layers; wherein the polarizing layer 12 may be located between the substrate layer 11 and the compensation layer 13 .

[0079] In some embodiments, an adhesive layer 14 can be formed on a side of the compensation layer 13 away from the polarizing layer 12 , a protective film 15 can be formed on a side of the substrate layer 11 away from the polarizing layer 12 , and a release film 16 can be formed on a side of the adhesive layer 14 away from the compensation layer 13 to form the polarizer 10 .

[0080] In some embodiments, the adhesive layer 14 can be used to bond the polarizer 10 to other structures, such as bonding the polarizer 10 to a display panel, etc. The adhesive layer 14 can be made of at least one of an acrylic resin, a silicone resin, and a polyurethane resin.

[0081] It is understandable that the protective film 15 and the release film 16 will be removed during the use of the polarizer 10. For example, when the polarizer 10 is attached to the display panel, the protective film 15 and the release film 16 will be removed.

[0082] The embodiments of the present application provide Example 1, Example 2, Comparative Example 1 and Comparative Example 2 to verify the performance of the substrate layer 11 and the polarizer 10 provided in the embodiments of the present application.

[0083] In Example 1 and Example 2, the manufacturing process of the substrate layer 11 and the polarizing layer 12 includes:

[0084] Radiation modification: using an electron beam as a radiation source to irradiate polyethylene terephthalate at room temperature and pressure, with an irradiation dose of 120 kGy and a dose rate of 20,000 kGy h-1; to obtain the polymer material.

[0085] Preparation of the polarizer 10: The obtained polymer material, the polarizing layer 11 (polyvinyl alcohol) that has undergone processes such as washing, swelling, dyeing, stretching, fixing and drying, and the compensation layer 13 are subjected to three-layer composite to obtain a polarizer substrate; the polarizer substrate may include a stacked base material layer 11, a polarizing layer 12 and a compensation layer 13.

[0086] Then, a pressure-sensitive adhesive is coated on the PET film with a release agent; then, after heating at a temperature of 80 to 120° C. for 1 to 5 minutes, the PET film and the polarizer substrate are bonded together to form the polarizer 10; wherein, the pressure-sensitive adhesive forms the adhesive layer 14, and the PET film with a release agent forms the release film 16.

[0087] In addition, a protective film 15 may be formed on a side of the substrate layer 11 away from the polarizing layer 12 .

[0088] In Example 1, the polymer material modified in the above steps can be used to form the substrate layer 11; in Comparative Example 1, polyethylene terephthalate is used to form a control substrate; and the properties of the substrate layer 11 and the control substrate in Example 1 and Comparative Example 1 are verified to obtain the data shown in Table 1 below.

[0089] Table 1

[0090] Transmittance (%) Haze / (%) <![CDATA[Water vapor permeability (g / m 2 *24h)]]> Example 1 91.6 0.05 ～610 Comparative Example 1 91.6 0.05 ～630

[0091] As can be seen from Table 1, the modification of the material of the substrate layer 11 in the embodiment of the present application does not affect the optical properties of the substrate layer 11, that is, the substrate layer 11 still has a high transmittance and a low haze, and the moisture permeability can also meet the requirements, which is not much different from that of the unmodified substrate.

[0092] Furthermore, in Example 2, the polarizer 10 obtained in the above steps can be used; in Comparative Example 2, except that the material of the substrate layer is formed of unmodified polyethylene terephthalate, the other structures and materials of the control polarizer are the same; and the properties of the polarizer 10 and the control polarizer in Example 2 and Comparative Example 2 are verified to obtain the data shown in Table 2 below.

[0093] Table 2

[0094]

[0095] Among them, in the reliability test, there are the following test standards:

[0096] A. △Ts<5%; Transmittance comparison before and after test;

[0097] B、△ab=(△a 2 +△b 2 ) 1 / 2 <5; color comparison before and after test;

[0098] C. Dimensional shrinkage ≤ 3%;

[0099] D. Check whether there are bubbles, dirt, etc. on the surface of the substrate;

[0100] E. No peeling phenomenon.

[0101] Among them, the thermal shock test, high temperature test and low temperature test all need to meet A, B, C and E, and the high temperature and high humidity test needs to meet A, B, C, D and E.

[0102] During the pencil hardness test, prepare a test sample (160mm long, 100mm wide) and secure it to the sample holder of the pencil hardness tester. Use a 500g weight as the load. Lightly touch the test sample with a Mitsubishi pencil at a 45° angle. Set the pencil speed to 0.5mm / s and scratch a 10mm mark on the sample surface. Rotate the pencil after each measurement, repeating the test five times. Check the sample for scratches. If there are no scratches or one scratch, consider it OK. If there are two scratches, consider it NG. Record the OK hardness value as the sample hardness.

[0103] In Table 2, "O" or "OK" indicates that the test passed, and "NG" indicates that the test failed.

[0104] As can be seen from Table 2, the polarizer 10 prepared using the substrate layer 11 in the embodiment of the present application is superior to the control polarizer in Comparative Example 2 in the hot and cold shock test, high temperature test, low temperature test, and high temperature and high humidity test. In addition, the polarizer 10 prepared using the substrate layer 11 in the embodiment of the present application can meet the hardness test standard of 5B to 10B in the pencil hardness test, while Comparative Example 2 cannot meet the standard. Therefore, using the substrate layer 11 in the embodiment of the present application to prepare the polarizer 10 can effectively improve the hardness of the substrate layer 11 and the polarizer 10, reduce the probability of the polarizer 10 being scratched, increase the service life of the polarizer 10, and improve the display effect of the display module having the polarizer 10. In addition, the present application does not require an additional hardening coating, thereby simplifying the process and reducing costs.

[0105] In addition, please combine Figure 1 as well as Figure 3 The embodiment of the present application also provides a display module, and the display module includes a display panel 20 and a polarizer 10 attached to one side of the display panel 20. The polarizer 10 is the polarizer 10 described in the above embodiment, or the polarizer 10 is made using the polarizer manufacturing method described in the above embodiment.

[0106] In some embodiments, the display panel 20 may include an array substrate 21, a color film substrate 22, and a liquid crystal layer (not shown in the figure) arranged between the array substrate 21 and the color film substrate 22; wherein, the polarizer may be arranged on the side of the array substrate 21 away from the color film substrate 22.

[0107] In some embodiments, the display module also includes a backlight assembly 30, and the display panel 20 is located on the light-emitting side of the backlight assembly 30, and the polarizer 10 is located between the display panel 20 and the backlight assembly 30; that is, the array substrate 21 is located between the backlight assembly 30 and the color film substrate 22, and the polarizer 10 is located between the array substrate 21 and the backlight assembly 30.

[0108] Furthermore, the substrate layer 11 is located between the polarizing layer 12 and the backlight assembly 30; wherein, the protective film 15 and the release film 16 are removed from the polarizer 10, and the polarizer 10 is bonded to the display panel 20 through the adhesive layer 14; and the substrate layer 11 is located on the side of the polarizing layer 12 away from the display panel 20; that is, it is located on the side of the polarizing layer 12 close to the backlight assembly 30.

[0109] It should be noted that the backlight assembly 30 contains at least one optical film, and the optical film is located on the side of the backlight assembly 30 close to the polarizer 10. During the manufacturing process or use of the display module, friction between the optical film and the polarizer 10 is likely to occur, which can easily scratch the polarizer 10 and affect the optical performance of the polarizer 10. However, the embodiment of the present application increases the hardness of the polarizer 10 by increasing the hardness of the substrate layer 11, and the substrate layer 11 is located on the side of the polarizer 10 close to the optical film. This can effectively reduce the probability of scratching the polarizer 10, thereby improving the service life of the polarizer 10 and the display effect of the display module.

[0110] In some embodiments, the display module further includes an opposing polarizer 40 , which is located on a side of the display panel 20 away from the backlight assembly 30 , that is, on a side of the display panel 20 away from the polarizer 10 .

[0111] The opposing polarizer 40 includes an opposing polarizer body 41 and a hardening layer 42 disposed on one side of the opposing polarizer body 41 .

[0112] In some embodiments, the hardening layer 42 is located on the side of the opposing polarizing body 41 away from the display panel 20; wherein, the opposing polarizing body 41 may include an opposing substrate and an opposing polarizing layer and an opposing compensation layer located on one side of the opposing substrate, and the opposing polarizing layer and the opposing compensation layer may both be located on the side of the opposing substrate away from the hardening layer 42.

[0113] It should be noted that, since the opposing polarizer 40 is located on the outside of the display module, that is, closer to the appearance surface of the display module relative to the polarizer 10, it is subjected to greater friction and stress than the polarizer 10; therefore, the opposing polarizer 40 has a higher hardness requirement than the polarizer 10, and the pencil hardness of 1B to 10B of the polarizer 10 is not sufficient to meet the requirements of the opposing polarizer 40; therefore, in the embodiment of the present application, it is necessary to provide the hardening layer 42 in the opposing polarizer 40, and the hardness of the hardening layer 42 is greater than the hardness of the polarizer 10.

[0114] It can be understood that in the embodiment of the present application, the polarizer 10 and the opposing polarizer 40 are differentially configured according to their different hardness requirements; that is, the material of the substrate layer 11 in the polarizer 10 is modified to meet the hardness requirements, and the process can be simplified and the cost can be reduced; and a hardening layer 42 is added to the opposing polarizer 40 to meet the higher hardness requirement of the opposing polarizer 40.

[0115] In some embodiments, the polarization direction of the polarizer 10 and the polarization direction of the opposing polarizer 40 may be perpendicular.

[0116] In summary, the embodiment of the present application increases the cross-linking density of the substrate layer 11 in the polarizer 10, thereby increasing the hardness of the substrate layer 11, effectively improving the hardness of the polarizer 10, reducing the probability of the polarizer 10 being scratched, increasing the service life of the polarizer 10, and improving the display effect of the display module having the polarizer 10; in addition, the present application does not require the additional addition of a hardening coating, thereby simplifying the process and reducing costs.

[0117] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0118] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0119] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0120] The above are merely preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A polarizer, characterized in that: include: substrate layer; a polarizing layer, disposed on the substrate layer; The substrate layer contains a cross-linked network structure formed by a polymer material, and the cross-linking density of the polymer material is greater than or equal to 10 mol / m 3 , and less than or equal to 10 5 mol / m 3 .

2. The polarizer according to claim 1, wherein The pencil hardness of the substrate layer ranges from 1B to 10B.

3. The polarizer according to claim 1, wherein The polymer material includes at least one of polyethylene terephthalate, cellulose triacetate, carbonate, polymethyl methacrylate and cycloolefin polymer.

4. A method for manufacturing a polarizer, characterized in that: The following steps are involved: A substrate layer is formed, wherein the substrate layer comprises a cross-linked network structure formed by a polymer material, and the cross-linking density of the polymer material is greater than or equal to 10 mol / m 3 , and less than or equal to 10 5 mol / m 3 ; A polarizing layer is formed on one side of the substrate layer.

5. The method for manufacturing a polarizer according to claim 4, wherein: The step of forming the substrate layer comprises: Radiation-modifying the polymer material, wherein the polymer material comprises at least one of polyethylene terephthalate, cellulose triacetate, carbonate, polymethyl methacrylate, and cycloolefin polymer; The modified polymer material is used to form the substrate layer.

6. The method for manufacturing a polarizer according to claim 5, wherein: The step of radiation modifying the polymer material comprises: The polymer material is modified by electron beam or gamma ray.

7. A display module, characterized in that: The display module includes a display panel and a polarizer attached to one side of the display panel. The polarizer is the polarizer according to any one of claims 1 to 3, or the polarizer is made by the method for making a polarizer according to any one of claims 4 to 6.

8. The display module according to claim 7, wherein: The display module further includes a backlight assembly, and the display panel is located on the light-emitting side of the backlight assembly, the polarizer is located between the display panel and the backlight assembly, and the substrate layer is located between the polarizing layer and the backlight assembly.

9. The display module according to claim 8, wherein: The display module further includes an opposing polarizer, which is located on a side of the display panel away from the backlight assembly, and includes: Opposed polarized subject; The hardening layer is arranged on one side of the opposite polarizing body.

10. The display module according to claim 9, wherein: The hardness of the hardened layer is greater than that of the base material layer.

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