Polarizing glass, preparation method and liquid crystal panel

Abstract

The invention relates to the technical field of display equipment, in particular to polarizing glass, a preparation method and a liquid crystal panel, and the preparation method comprises the following steps: arranging a polarizing layer on one surface of a glass substrate in a stacked manner; an enclosed heat insulation glue layer is arranged on the side surface of the polarization layer; a color filter is laminated on the surface, deviating from the glass substrate, of the polarizing layer; and carrying out relative bending treatment and welding treatment on the protruding parts on the edges of the glass substrate and the color filter, and forming a sealing edge on the outer side of the heat insulation glue layer. The prepared polarizing glass separates the polarizing layer from the external environment, reduces water vapor invasion, reduces the possibility of water absorption hydrolysis and heating denaturation of the polarizing layer, greatly relieves the problems of color fading, foaming, deformation and light leakage of the polarizing layer, improves the display stability in a screen, and prolongs the service life of the screen; the prepared polarizing glass has corresponding polarizing performance and meets the requirements of liquid crystal display; tAC layers and the like can be reduced, the display effect is improved, the technological process is reduced, and the cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of display devices, and in particular to polarized glass, a preparation method thereof, and a liquid crystal panel. Background Art

[0002] Existing LCD screens typically feature a polarizer, located in each of the upper and lower modules of the liquid crystal display. The primary functional layer in these polarizers is the polarizing film, composed of polyvinyl alcohol (PVA) and dyes, which creates a polarizing effect. However, the polarizing film's material has a certain degree of water absorption and hydrolysis properties, and also exhibits poor high-temperature stability. Therefore, during storage and use of LCD screens, and under high-temperature and high-humidity storage and transportation conditions, condensation is prone to form at the ends of the polarizers, leading to uncontrollable discoloration and light leakage at the edges. Over time, the polarizers can also fade, blister, or deform, affecting the overall display quality.

[0003] Traditional polarizers are often multi-layer structures, with a triacetyl cellulose (TAC) layer as a support layer to sandwich the PVA film layer. In order to improve the moisture and heat resistance of the polarizer as much as possible, some polarizer manufacturers will use polymethyl methacrylate (PMMA), polyethylene terephthalate (PET) and other low-hydrophilic materials instead of the TAC layer as the support layer of the PVA polarizing film. Therefore, the polarizers received by screen manufacturers from polarizer suppliers are often multi-layer structures, and such polarizers are then used in liquid crystal display screens. For example, they are applied above the liquid crystal layer to form a structure such as glass base-transparent optical adhesive layer-polarizer-color filter layer-liquid crystal layer. Although the multi-layer structure of the polarizer has improved the service life of the polarizer to a certain extent, the hydrophilicity and hydrolysis characteristics of high molecular polymers such as PVA themselves are still a considerable challenge to the weather resistance, transportation and storage under high temperature and high humidity conditions, and the service life of the polarizer, and the improvement effect is limited.

[0004] Therefore, a better way is needed to ensure that the corresponding components in the screen can not only meet the corresponding polarization requirements, but also improve weather resistance and moisture and heat resistance. Summary of the Invention

[0005] The purpose of this application is to provide polarized glass, a preparation method and a liquid crystal panel, aiming to solve the problem in the prior art that the display screen has poor weather resistance and poor moisture and heat resistance due to the poor display effect of the polarizing film.

[0006] To achieve the above application objectives, the technical solutions adopted in this application are as follows:

[0007] In a first aspect, the present application provides a method for preparing polarized glass, comprising the following steps:

[0008] A polarizing layer is laminated on one surface of the glass substrate;

[0009] Applying thermal insulation adhesive on the side of the polarizing layer and curing it to form a thermal insulation adhesive layer, wherein the thermal insulation adhesive layer surrounds the side of the polarizing layer;

[0010] A color filter is stacked on the surface of the polarizing layer facing away from the glass substrate, and the edges of the glass substrate and the color filter extend beyond the edge of the thermal insulation adhesive layer to form a protrusion;

[0011] The protruding parts of the glass substrate and the color filter are relatively bent and welded to form an edge seal on the outer side of the thermal insulation adhesive layer.

[0012] In the preparation method of the present application, the protruding parts of the edges of the glass substrate and the color filter are welded to form an edge seal, in which the polarizing layer is encapsulated. The heat-insulating adhesive layer blocks heat during welding to protect the polarizing layer. In the polarized glass finally obtained, the heat-insulating adhesive layer will also form an inner package, so that the side of the polarizer is blocked from the outside world by the heat-insulating adhesive layer and the edge seal, which is beneficial to isolate the polarizing layer from the external environment, alleviate the problems of fading, bubbling, deformation, discoloration and light leakage of the polarizing layer, improve the display stability used in the screen, increase the service life, especially in high temperature and high humidity environments, and make it easier to store and transport; and the polarized glass obtained already has corresponding polarizing properties, which meets the requirements of liquid crystal display; and such a polarizing layer can only include a film layer of polarizing functional material, which is beneficial to improve the display effect, reduce the process flow and reduce costs. The preparation method of the present application is process-controllable, and the polarized glass obtained has high structural and property stability.

[0013] In a second aspect, the present application provides a polarized glass comprising: a glass substrate, a polarizing layer, a color filter layer, a heat-insulating adhesive layer, and an edge sealant;

[0014] The glass substrate, polarizing layer, and color filter layer are stacked in sequence to form a sandwich structure, and the edge seal is enclosed and packaged on the side of the stacked structure formed by the glass substrate, polarizing layer, and color filter layer; the heat insulating adhesive layer is filled and arranged between the side of the polarizing layer and the edge seal.

[0015] Compared to the prior art, which uses polarizing films as multi-layer polarizers for screen glass, the polarizing glass of this application directly seals the polarizing layer between the glass base and the color filter layer through edge sealing, and also includes a thermal insulation adhesive layer. This directly isolates the polarizing layer from the external environment, reducing water vapor intrusion and the likelihood of the polarizing layer undergoing hydrolysis and thermal denaturation. This significantly alleviates the problems of fading, blistering, or deformation of the polarizing layer, as well as discoloration and light leakage at its edges. This improves display stability and service life, especially in high-temperature and high-humidity environments, and facilitates storage and transportation. Furthermore, the encapsulated polarizing glass already possesses the appropriate polarizing properties, meeting the requirements of liquid crystal displays. Furthermore, this encapsulation method eliminates the need for complex TAC, PMMA, and PET layers as support for the polarizing layer, allowing it to consist solely of a film layer of polarizing functional material, further enhancing display quality.

[0016] In a third aspect, the present application provides a liquid crystal panel, comprising a liquid crystal layer, and also comprising polarized glass prepared by the preparation method of the above application or comprising the polarized glass of the above application, wherein the liquid crystal layer and the polarized glass are stacked.

[0017] Since the polarized glass of the present application has polarizing properties and is not easily affected by external moisture and high temperature, it has good display stability. The polarized glass can be used as the glass above the liquid crystal layer in the liquid crystal panel. The polarized glass is set above the liquid crystal layer, and the backlight side components can be set below the liquid crystal layer. Such a liquid crystal panel has good display stability and is not easy to change color. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 This is a schematic flow chart of the method for preparing the polarized glass of the present application;

[0020] Figure 2 This is a structural diagram of a glass substrate 1 in step S1 of Example 1 of the present application in which a first groove 12 is formed;

[0021] Figure 3 This is a schematic structural diagram of step S2 of Example 1 of the present application in which a polarizing layer 2 is provided;

[0022] Figure 4 This is a schematic structural diagram of the step S3 of Example 1 of the present application in which the thermal insulation adhesive layer 3 is provided;

[0023] Figure 5 This is a structural diagram of the step S4 of Example 1 of the present application in which a color filter 4 is provided;

[0024] Figure 6 Schematic diagram of the structure of the polarized glass prepared in Example 1 of the present application;

[0025] Figure 7 This is a schematic structural diagram of the step S4 of Example 3 of the present application in which a color filter 4 is provided;

[0026] Figure 8 This is a schematic structural diagram of setting a polarizing layer 2 in step S2 of Example 4 of the present application;

[0027] Figure 9 This is a structural diagram of setting a thermal insulation adhesive layer 3 in step S3 of Example 4 of the present application;

[0028] Figure 10 This is a schematic structural diagram of the step S4 of Example 4 of the present application in which a color filter 4 is provided;

[0029] Reference numerals:

[0030] 1-Glass substrate; 11-Surface; 12-First groove; 2-Polarizing layer; 3-Insulation adhesive layer; 4-Color filter; 41-Second groove; 5-Edge sealing; 6-Glass base layer; 7-Color filter layer. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, the present application is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0032] In this application, the term "and / or" describes the relationship between associated objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. A and B can be singular or plural. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0033] In this application, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items.

[0034] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. Some or all of the steps can be executed in parallel or sequentially. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0035] The weights of the relevant components mentioned in the examples of this application may not only refer to the specific content of each component, but also represent the weight ratio between the components. Therefore, as long as the content of the relevant components is proportionally enlarged or reduced according to the examples of this application, it is within the scope disclosed in the examples of this application. Specifically, the mass in the examples of this application may be μg, mg, g, kg, etc., which are mass units known in the chemical industry.

[0036] The terms "first" and "second" are used for descriptive purposes only, to distinguish objects such as substances from one another, and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. For example, without departing from the scope of the embodiments of the present application, the first "something" may also be referred to as the second "something", and similarly, the second "something" may also be referred to as the first "something". Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of such features.

[0037] The first aspect of the present application provides a method for preparing polarized glass, such as Figure 1 As shown, the preparation method comprises the following steps:

[0038] S10: Laminating a polarizing layer 2 on a surface 11 of the glass substrate 1;

[0039] S20: applying a heat-insulating adhesive on the side of the polarizing layer 2 and curing the adhesive to form a heat-insulating adhesive layer 3, wherein the heat-insulating adhesive layer 3 surrounds the side of the polarizing layer 2;

[0040] S30: Laminating a color filter 4 on the surface of the polarizing layer 2 facing away from the glass substrate 1, with the edges of the glass substrate 1 and the color filter 4 both extending beyond the edge of the thermal insulation adhesive layer 3 to form a protrusion;

[0041] S40 : performing relative bending processing on the protruding portions of the glass substrate 1 and the color filter 4 and welding them together to form a sealed edge 5 on the outer side of the heat-insulating adhesive layer 3 .

[0042] The preparation method of the embodiment of the present application welds the protruding portions of the edges of the glass substrate 1 and the color filter 4 to form an edge seal 5, encapsulating the polarizing layer 2 therein, and the heat-insulating adhesive layer 3 blocks heat during welding to protect the polarizing layer 2. In the polarized glass finally obtained, the heat-insulating adhesive layer 3 also forms an inner seal, so that the side of the polarizing layer 2 is blocked from the outside by the heat-insulating adhesive layer 3 and the edge seal 5, which is beneficial to isolating the polarizing layer 2 from the external environment, alleviating the problems of fading, bubbling, deformation, discoloration and light leakage of the polarizing layer 2, improving the display stability used in the screen, and increasing the service life, especially in high temperature and high humidity environments, making it easier to store and transport; and the polarized glass obtained already has the corresponding polarizing performance, meeting the requirements of liquid crystal display; and such a polarizing layer 2 can only include a film layer of polarizing functional material, which is beneficial to improving the display effect, reducing the process flow and reducing costs. The preparation method of the embodiment of the present application is process-controllable, and the polarized glass obtained has high structural and property stability.

[0043] In step S10, you can refer to Figure 8 , first provide a glass substrate 1, the shape of the display surface may include but is not limited to rectangular, circular, elliptical, etc., and the thickness may be 100 to 2000 μm. In the embodiment, the glass substrate 1 may first be surface treated, and in a high clean environment, ultrasonically cleaned for 5 minutes at 40°C in an alkaline cleaning solution, cleaned with deionized water for 3 minutes, and then plasma cleaned for 1 minute to make the contact angle of the surface of the glass substrate 1 <10°, which is more conducive to the subsequent lamination and setting of the polarizing layer 2. If transparent optical glue is needed to bond the glass substrate 1 to the polarizing layer 2, OCA glue may be coated on one surface 11 of the glass substrate 1. The thickness of the OCA glue layer may be 20 to 100 μm, and then the OCA glue may be pre-cured to give the OCA glue layer a certain surface viscosity to improve the strength of bonding with the polarizing layer 2. For example, UV ultraviolet light is used to pre-cure the OCA glue. Of course, other processes other than UV ultraviolet light pre-curing may also be used to pre-cure the OCA glue. The OCA adhesive will not be described in detail below. The glass substrate 1 may be provided with an OCA adhesive layer or not. Those skilled in the art can adjust it according to the bonding requirements.

[0044] In an embodiment, the material of the polarizing layer 2 may be a polarizing functional material comprising polyvinyl alcohol and iodine, and the step of laminating the polarizing layer 2 may be as follows: in a low humidity (<30% RH) environment, a PVA / I2 solution is applied to the surface 11 of the glass substrate 1 at a high shear rate to preliminarily form a PVA / I2 film having a thickness of 10 to 30 μm. Subsequently, a nylon brush is used to rub and orient the film along the coating direction to obtain a PVA / I2 polarizing functional layer with oriented I2 molecules. After oriented alignment, the film is dried at a preset temperature, and a gradient temperature baking process may be used, with each baking at 40°C / 60°C / 80°C for 30 minutes. The molecular orientation is fixed while removing the solvent to obtain a heat-cured polarizing layer 2, which is laminated on the surface 11 of the glass substrate 1.

[0045] The polarizing layer 2 can also be made of a polarizing material comprising polyvinyl alcohol (PVA) and an azo compound, or polyvinyl alcohol and anthraquinone. In an exemplary embodiment, a photosensitive solution can be prepared. The photosensitive solution is composed of raw materials including polyvinyl alcohol, an azo compound, and a photoinitiator. A PVA solution can be prepared using an ethanol-propylene glycol methyl ether mixture as the organic solvent and mixed with PVA. An azobenzene derivative, a photoinitiator, and a leveling agent are then added to prepare a photosensitizing dye solution. A thin film of the photosensitizing dye can be spin-coated onto the surface 11 of the glass substrate 1 using a coater. The film can have a thickness of 10 to 30 μm and is then baked at 80°C for 3 minutes to remove any residual solvent. Linearly polarized light is incident perpendicularly on the glass substrate 1, away from the surface coated with the photosensitizing dye, to penetrate the glass substrate 1 and act on the dye film. The irradiation lasts for 10 minutes. Simultaneously with the linearly polarized light irradiation, unpolarized UV light is applied to the dye film in the opposite direction to the linearly polarized light, triggering polymerization of the photoinitiator and cross-linking the dye film onto the glass substrate 1. The plate was then heated to 60°C at a rate of 5°C / min and held at that temperature for 30 minutes to eliminate internal stress. This improved the overall orientation consistency of the dye in the polarizer's functional layer, which helped improve the polarization and light transmission of the polarizing layer 2 and also reduced its hydrophilicity.

[0046] Step S20 is the step of setting the thermal insulation adhesive layer 3. Since the subsequent welding process will generate local high temperature, which has a great impact on the polarizing layer 2 (and possibly the optical adhesive layer), it is necessary to protect the polarizing layer 2. The specific steps are to apply thermal insulation adhesive on the side of the polarizing layer 2 and solidify it to form the thermal insulation adhesive layer 3. The thermal insulation adhesive layer 3 encloses the side of the polarizing layer 2. Figure 9The beneficial effects are as follows: on the one hand, from the perspective of the preparation method, the thermal insulation adhesive can block the high temperature during the welding process, making the polarizing layer 2 less susceptible to the local high temperature during the welding process and less likely to affect the display effect; on the other hand, the role of the thermal insulation adhesive is not limited to the preparation method. From the perspective of producing polarized glass, the thermal insulation adhesive will form a thermal insulation adhesive layer 3 after curing, providing a layer of "inner packaging" for the polarized glass, reducing the impact of external moisture and high temperature on the polarizing layer 2, and improving the service life and display effect.

[0047] In an embodiment, the thermal insulation adhesive may be a thermal insulation adhesive that is high temperature resistant, has low thermal conductivity, and is chemically inert. Based on the characteristics of the polarizing layer 2 and the characteristics of the welding process, the applicant provides an embodiment in which the thermal insulation adhesive may adopt a silicone resin system, which may include the following components: silicone resin, thermal insulation filler, boron nitride, dispersant, surface modifier, sunscreen, and may also include catalysts, solvents, etc. Among them, the silicone grease is a high temperature resistant matrix, the thermal insulation filler further improves the thermal insulation performance, the boron nitride can significantly improve the thermal insulation performance, the surface modifier can modify the surface of the boron nitride, enhance its interfacial bonding with the silicone resin matrix, and improve the thermal insulation performance, the sunscreen can improve the light absorption performance of the thermal insulation adhesive and reduce the side light leakage of the polarizing layer 2, and the dispersant can improve the dispersibility of the sunscreen. In some embodiments, the thermal insulation filler may include at least one of silica aerogel, hollow glass microspheres, inorganic ceramic fibers, and nano-titanium dioxide. The boron nitride may be a boron nitride nanomaterial, such as hexagonal boron nitride nanomaterial. The dispersant may include at least one of dimethyl silicone oil and polyethylene glycol. The surface modifier may include a silane coupling agent. The opacifier may include at least one of carbon black, black iron oxide, and titanium black. The thermal insulation adhesive made from these materials is chemically inert and has low thermal conductivity. It can withstand temperatures up to 300°C without softening or denaturing, making it suitable for adhesion and protection of the side surfaces of the polarizing layer 2, and providing thermal insulation during welding.

[0048] In this example, the thermal insulation adhesive can be prepared according to the following steps: First, filler pretreatment is performed. Carbon black and dimethyl silicone oil are mixed in a grinder at a mass ratio of 4:3 and ground to less than 2 μm to prepare carbon black dispersion slurry A. Boron nitride nanosheets and a silane coupling agent (3 wt% by mass of the boron nitride nanosheets) are added to ethanol and heated at 80°C for 2 hours for activation. Silica aerogel powder is preheated at 200°C for 2 hours in a vacuum. Then, a silane coupling agent (1.5 wt %, mass ratio of the silicone resin) was added to the silicone resin at 40°C, and then stirred at a low speed. At the same time, hollow glass microspheres (12 wt %), silica aerogel powder (8 wt %), and activated boron nitride nanosheets (5 wt %) were added in sequence. The values ​​in brackets are the ratios of the total mass of the silicone resin to which the silane coupling agent was added. After each addition of each component, stirring was continued for 10 min to disperse the dispersion to obtain a dispersion. Subsequently, dispersion slurry A (8 wt %, mass ratio of the above-mentioned mixed dispersion) was added and stirred at high speed for 30 min and vacuum degassed. 1-ethynyl-1-cycloethanol (0.5 wt %, mass ratio of the slurry after the above-mentioned vacuum degassed slurry) was added to obtain a mixed slurry B; methyl hydrogen silicone oil and platinum catalyst (1 wt %, mass ratio of the methyl hydrogen silicone oil) were fully stirred and mixed to obtain a mixed slurry C; the mixed slurry B and the mixed slurry C were mixed in a weight ratio of 10:1 to obtain a thermal insulation adhesive. In the embodiment, the thermal insulation adhesive can be prepared according to the component contents of silicone resin (65wt%), hollow glass microspheres (12wt%), silica aerogel powder (8wt%), silane coupling agent (1.5wt%), boron nitride nanosheets (5wt%), dispersion slurry A (8wt%), and 1-ethynyl-1-cycloethanol (0.5wt%).

[0049] During the step of coating the side of the polarizing layer 2 with the surrounding thermal insulation adhesive, the thickness of the thermal insulation adhesive coating can be 100-250 μm along the direction parallel to the surface 11. The height of the thermal insulation adhesive coating along the thickness direction of the polarizing layer 2 can be selected to completely cover the polarizing layer 2. This makes it easier to achieve sufficient "inner packaging" after the thermal insulation adhesive is applied and cured to form the thermal insulation adhesive layer 3. Curing can be carried out in stages: pre-curing by heating to 50°C at 2°C / min for 1 hour, main curing by heating to 70°C at 0.5°C / min for 2 hours, and finally curing by heating to 100°C for 0.5 hours to complete the curing of the entire adhesive layer. Along a direction parallel to surface 11, the resulting thermal insulation layer 3 can have a thickness of 100 to 250 μm. In exemplary embodiments, this thickness can include, but is not limited to, any value of 100 μm, 150 μm, 200 μm, or 250 μm, or a range between any two values. A thermal insulation layer 3 of this thickness can effectively block heat generated by welding and, after producing polarized glass, effectively block the intrusion of external moisture. The distance between the thermal insulation layer 3 and the edge of surface 11 can be 150 to 300 μm. In exemplary embodiments, this thickness can include, but is not limited to, any value of 150 μm, 200 μm, 250 μm, or 300 μm, or a range between any two values. Maintaining a certain distance from the edge primarily allows for pre-reserved space for welding protrusions, and maintaining a certain distance from the weld center maximizes thermal insulation performance.

[0050] Step S30 is a step of stacking the color filter 4. Figure 10 As shown, the shape and size of the color filter 4 can refer to the shape and size of the above-mentioned glass substrate 1, and the color filter 4 is stacked on the polarizing layer 2, that is, the polarizing layer 2 is stacked between the glass substrate 1 and the color filter 4, and the edges of the glass substrate 1 and the color filter 4 both exceed the edge of the thermal insulation adhesive layer 3 to form a protrusion.

[0051] It should be noted that there is no special restriction on the order of the above steps S20 and S30, as long as the heat-insulating adhesive layer 3 is set before the welding process. Therefore, the heat-insulating adhesive layer 3 can be set in step S20 before the color filter is set in step 30, that is, after the polarizing layer 2 is stacked in step S10, the heat-insulating adhesive layer 3 is set first, and then the color filter 4 is stacked; or it can be set after the color filter 4 is stacked in step S30, that is, after the polarizing layer 2 is stacked in step S10, the color filter 4 is stacked first, and then the heat-insulating adhesive layer 3 is set. Both methods belong to the technical solutions of the present application, as long as the final formation is as follows. Figure 10 The edge structure shown is sufficient.

[0052] Step S40 is a step of performing relative bending and welding. Figure 10As shown, the edges of the glass substrate 1 and the color filter 4 extend beyond the edge of the thermal insulation adhesive layer 3, forming protrusions. These protrusions of the glass substrate 1 and the color filter 4 are bent relative to each other and sealed together. In this packaging method, the edge seal 5 is actually formed by the protrusions of the glass substrate 1 and the color filter 4, rather than being a separate component. Only this side-encapsulated portion is referred to as the edge seal 5. This packaging method improves integrity and is more conducive to blocking external moisture, reducing the impact on the polarizing layer 2.

[0053] Specifically, the welding process involves locally heating and softening the edges of the protruding portions using a high-energy laser, then bending them relative to each other and welding them together. The power of the high-energy laser can be determined based on the softening temperatures of the glass substrate 1 and the color filter 4. After the heating and softening process, a He + 5% H₂ mixture is used for local cooling to complete the interlayer welding process. This allows the protruding portions of the glass substrate 1 and the color filter 4 to be welded together, forming the edge seal 5 of the polarized glass and ultimately resulting in a single-piece polarized glass.

[0054] In order to further protect the polarizing layer 2 and reduce the impact of welding on its materials and properties, on the basis of the above-mentioned provision of the thermal insulation adhesive layer 3, a thermal insulation groove can be further provided to reduce the impact of local high temperature during welding. In some embodiments, such as Figure 2 、 Figure 3 As shown, the above-mentioned step S10 of laminating and setting the polarizing layer 2 may include the following steps S11 to S12:

[0055] S11: forming a first groove 12 on the periphery of the surface 11 of the glass substrate 1, wherein the first groove 12 encloses a central area of ​​the surface 11;

[0056] S12: stacking a polarizing layer 2 in the central area;

[0057] The first groove 12 can play a role in buffering and heat insulation, reducing the heat transferred to the polarizing layer 2 by heat conduction during welding. The first groove 12 can be opened by using a picosecond laser with a power of 8W to perform laser etching at a certain distance from the edge of the surface 11. The etching path can be etched in a circular manner along a certain distance from the edge of the surface 11. The first groove 12 formed can enclose the central area of ​​the surface 11. When applying the thermal insulation glue in the subsequent step S20, it can be as follows. Figure 4 As shown, the thermal insulation adhesive is applied at least between the side of the polarizing layer 2 and the first groove 12, and then solidifies to form the thermal insulation adhesive layer 3. This double thermal barrier, the first groove 12 and the thermal insulation adhesive layer 3, further protects the polarizing layer 2 and reduces the effects of welding heat. The phrase "at least applied" refers to the thermal insulation adhesive being applied not only between the side of the polarizing layer 2 and the first groove 12, but also partially within the first groove 12.

[0058] In some embodiments, the depth of the first groove 12 can be 50 to 150 μm, optionally 80 μm. The width of the first groove 12 can be 100 to 150 μm, optionally 150 μm. The distance between the first groove 12 and the edge of the polarizing layer 2 can be 200 to 400 μm, optionally 200 μm, to provide a buffer and thermal insulation effect. This distance can also be used to set thermal insulation glue. In some embodiments, the distance between the first groove 12 and the edge of the surface 11 can be 50 to 100 μm, optionally 50 μm. The area within this distance can serve as a heated and softened area for the glass substrate 1 during welding, so that the bent shape of the first groove 12 structure is retained in the final polarized glass, which is conducive to forming a certain thermal insulation buffer zone to resist external thermal shock.

[0059] In addition to the above-mentioned first groove 12 being formed on the surface 11 of the glass substrate 1, the following can also be done: Figure 5 As shown, a second groove 41 is also defined on one surface of the color filter 4. When the color filters 4 are stacked, the second groove 41 is positioned opposite the first groove 12. This further enhances the buffering and heat insulation effect during welding and further protects the polarizing layer 2. The parameters of the second groove 41 can refer to those of the first groove 12 described above. In this embodiment, only the first groove 12 can be defined on the glass substrate 1, only the second groove can be defined on the color filter 4, or both can be defined.

[0060] If optical glue is needed to bond the glass substrate 1 and the polarizing layer 2 , the optical glue can be applied to the central area of ​​the glass substrate 1 after the first groove 12 is formed, and then the polarizing layer 2 is laminated.

[0061] After encapsulation and welding, the polarized glass already has polarization function, eliminating the need for additional polarizers. It also blocks moisture intrusion during use and has excellent weather resistance. This polarized glass can be directly used in the subsequent cell manufacturing process for liquid crystal panels. Alternatively, the outer surface of the resulting glass substrate 1 can be processed through processes such as nano-coating to achieve other functions such as low reflection.

[0062] The second aspect of the present application provides a polarized glass prepared by the preparation method of the above-mentioned embodiment. In the embodiment, Figure 6 As shown, the polarized glass includes: a glass base layer 6, a polarizing layer 2, a color filter layer 7, a heat-insulating adhesive layer 3, and an edge seal 5;

[0063] The glass base layer 6, the polarizing layer 2, and the color filter layer 7 are stacked in sequence to form a sandwich structure, and the edge seal 5 encloses and seals the side of the stacked structure formed by the glass base layer 6, the polarizing layer 2, and the color filter layer 7; the thermal insulation adhesive layer 3 is filled and set between the side of the polarizing layer 2 and the edge seal 5.

[0064] Compared to the prior art, which uses polarizing films as multiple layers for use in screen glass, the polarized glass of the present embodiment directly encapsulates the polarizing layer 2 between the glass substrate 6 and the color filter layer 7 via edge sealing 5, and also incorporates a thermally insulating adhesive layer 3. This directly isolates the polarizing layer 2 from the external environment, reducing water vapor intrusion and the likelihood of hydrolysis and thermal denaturation of the polarizing layer 2. This significantly alleviates the problems of fading, blistering, or deformation of the polarizing layer 2, as well as discoloration and light leakage at its edges. This improves display stability and service life, especially in high-temperature and high-humidity environments, and facilitates storage and transportation. Furthermore, the encapsulated polarized glass already possesses the appropriate polarizing properties, meeting the requirements of liquid crystal displays. Furthermore, this encapsulation method eliminates the need for complex TAC, PMMA, and PET layers as support for the polarizing layer 2, allowing it to consist solely of a film layer of polarizing material, further enhancing display quality.

[0065] The glass base layer 6 and the color filter layer 7 are actually made of the above-mentioned glass substrate 1 and color filter 4, and are part of them. The protrusion formed by the edge of the glass substrate 1 and the edge of the color filter 4 has formed a sealing edge 5. The sealing edge 5 is actually integrated with the glass base layer 6 and the color filter layer 7.

[0066] In some embodiments, the glass substrate 6 can serve as both an outer protective layer and a light-transmitting glass. The thickness of the glass substrate 6 can range from 100 to 2000 μm. In exemplary embodiments, the thickness can include, but is not limited to, any value or range between 100 μm, 500 μm, 1000 μm, and 2000 μm, to achieve a balance between protection and light transmission. The display surface of the glass substrate 6 can have a shape including, but not limited to, rectangle, circle, or oval.

[0067] The polarizing layer 2 mainly filters and regulates light to form polarized light. When the polarizing glass of the embodiment of the present application is used in a display screen, the polarizing layer 2 can cooperate with the liquid crystal to enable the display screen to display images normally, and can also optimize the display performance such as the appearance and viewing angle of the display screen. In some embodiments, the thickness of the polarizing layer 2 can be 10 to 50 μm. In the exemplary embodiment, it can include but is not limited to any value of 10 μm, 20 μm, 30 μm, and 50 μm or a range between any two values, which is conducive to taking into account the above-mentioned performance. In some embodiments, the material of the polarizing layer 2 includes polyvinyl alcohol and a dye, and the dye includes at least one of iodine, azo, and anthraquinone. Among them, polyvinyl alcohol can absorb dyes of dichroic molecules to achieve a polarization effect. After stretching and orientation treatment and dyeing, the molecules are arranged in a single direction and have the ability to absorb light of a certain polarization direction, which determines the key indicators of the polarizing layer 2 such as polarization performance, transmittance, and hue. Iodine is a commonly used dye for polyvinyl alcohol. In the embodiment, anthraquinone dyes and iodine molecular dyes can be oriented by friction. Azo dyes can also be used as photoresponsive dyes, responding to polarized light through cis-trans isomerization to form an alignment. These dyes also exhibit more consistent alignment, excellent polarization and light transmission, and reduced hydrophilicity. For example, azo dyes can include azobenzene derivatives.

[0068] The polarizing layer 2 can be simply the polarizing functional layer formed by the polyvinyl alcohol and dye. Since the edge seal 5 has already enclosed and sealed the polarizing layer 2 between the glass substrate 6 and the color filter layer 7, the polarizing layer 2 does not need to be provided with a supporting layer such as a TAC layer, a PMMA layer, or a PET layer. Of course, the polarizing layer 2 can also be a multi-layer polarizer as known in the art, including a polarizing functional layer and the supporting layer.

[0069] The polarizing layer 2 and the glass substrate 6 may be stacked in a manner including, but not limited to, bonding. The two layers may be bonded together using a transparent optical adhesive (OCA). The thickness of the transparent optical adhesive may be 20 to 100 μm. In the exemplary embodiment, the thickness may include, but is not limited to, any value of 20 μm, 30 μm, 50 μm, 100 μm, or a range between any two values.

[0070] In some embodiments, the thickness of color filter layer 7 is 300-700 μm. Examples include, but are not limited to, any value or range between 300 μm, 500 μm, 600 μm, and 700 μm. Color filter layer 7 typically comprises a large number of primary color sub-pixels and is typically made of CF (color filter) glass, primarily used for color display. A color filter is an optical filter that precisely selects a narrow range of wavelengths to transmit while reflecting undesirable wavelengths.

[0071] In some embodiments, the thickness of the edge seal 5 along the direction parallel to the interface between the glass substrate 6 and the polarizing layer 2 can be 100 to 200 μm. In exemplary embodiments, this thickness can include, but is not limited to, any value or a range between 100 μm, 125 μm, 150 μm, and 200 μm. Edge seals 5 of these thicknesses can further enhance the encapsulation of the polarizing layer 2, reduce moisture intrusion, extend the service life of the polarizing layer 2, and improve display quality.

[0072] The thermal insulation adhesive layer 3 can play the role of thermal insulation buffer in the preparation method, reducing the impact of the welding process on the polarizing layer 2. In the polarized glass finally produced, the thermal insulation adhesive layer 3 is filled between the side of the polarizing layer 2 and the edge seal 5. On the one hand, the thermal insulation adhesive layer 3 forms a group of "inner packaging" structures with the glass base layer 6 and the color filter layer 7, and cooperates with the edge seal 5 to form an "external packaging" structure with the glass base layer 6 and the color filter layer 7, further improving the packaging effect of the polarizing layer 2 and reducing the intrusion of water vapor; on the other hand, it can also block external heat to a certain extent and reduce the impact of high temperature on the polarizing layer 2; these two points are conducive to alleviating the problems of discoloration, light leakage, fading, bubbling or deformation of the polarizing layer 2, thereby increasing the service life and improving the display effect.

[0073] A third aspect of the embodiments of the present application provides a liquid crystal panel, including a liquid crystal layer, and also including polarized glass prepared by the preparation method of the above embodiments of the application or including the polarized glass of the above embodiments of the application, wherein the liquid crystal layer and the polarized glass are stacked.

[0074] Since the polarized glass in the embodiment of the present application has polarizing properties and is not easily affected by external moisture and high temperature, it has good display stability. The polarized glass can be used as the glass above the liquid crystal layer in the liquid crystal panel. The polarized glass is set above the liquid crystal layer, and the backlight side components can be set below the liquid crystal layer. Such a liquid crystal panel has good display stability and is not easy to change color.

[0075] In the embodiment, the liquid crystal layer may be laminated to the surface of the color filter layer 7 and disposed on the surface of the color filter layer 7 facing away from the polarizing layer 2 .

[0076] The following describes the details in conjunction with specific embodiments.

[0077] Example 1

[0078] This embodiment provides polarized glass and a preparation method thereof, the preparation method comprising the following steps:

[0079] S1: Providing a glass substrate 1 with a thickness of 500 μm, and in a high-clean environment, ultrasonically cleaning the glass substrate 1 with an alkaline cleaning solution at 40° C. for 5 minutes, then cleaning the substrate with deionized water for 3 minutes, and then plasma cleaning the substrate for 1 minute to reduce the contact angle of the glass substrate 1 to less than 10°.

[0080] The surface 11 of the glass substrate 1 is laser etched using a picosecond laser with a power of 8W to etch a first groove 12. The etching path is continuous etching along a certain distance from the edges of the surface 11 to obtain an enclosed first groove 12. The first groove 12 encloses the central area of ​​the surface 11. The first groove 12 is 150 μm wide and 80 μm deep. The distance between the outer side of the first groove 12 and the edge of the surface 11 is 50 μm. The first groove 12 is a heat-insulating buffer structure. Figure 2 As shown;

[0081] S2: In the central area enclosed by the first groove 12, a transparent optical adhesive is applied to the central area using a slit coater, with the edge of the optical adhesive being 200 μm away from the inner side of the first groove 12. The thickness of the optical adhesive film formed by the application is 30 μm. A UV light pre-curing process is performed on the optical adhesive film to ensure that the optical adhesive film has a certain surface viscosity.

[0082] In a low humidity (<30% RH) environment, the slit coating rate is adjusted to apply the PVA / I2 solution to the surface of the optical adhesive film layer at a high shear rate, initially forming a PVA / I2 film with its edges aligned with the optical adhesive film layer and a thickness of 20 μm. A nylon brush is then used to rub and orient the film along the coating direction, resulting in a PVA / I2 polarizing functional layer with oriented I2 molecules. After orientation, a gradient temperature bake is performed at 40°C / 60°C / 80°C for 30 minutes each, removing the solvent while fixing the molecular orientation, resulting in a heat-cured polarizing layer 2, which is then bonded and laminated onto the surface 11 of the glass substrate 1. Figure 3 As shown;

[0083] UV curing is performed on the polarizing layer 2 and the glass substrate 1 after gradient temperature curing to completely cure the optical adhesive layer and improve the interface bonding strength;

[0084] S3: Prepare thermal insulation adhesive. First, pretreat the filler. Mix carbon black and dimethyl silicone oil in a 4:3 mass ratio using a grinder and grind to a size of less than 2 μm to prepare carbon black dispersion slurry A. Add boron nitride nanosheets and a silane coupling agent (3 wt%) to ethanol and heat at 80°C for 2 h for activation. Preheat silica aerogel powder at 200°C for 2 h in a vacuum. Then, a silane coupling agent (1.5 wt%) was added to the silicone resin at 40° C., and then the mixture was stirred at a low speed. At the same time, hollow glass microspheres (12 wt%), silica aerogel powder (8 wt%), and activated boron nitride nanosheets (5 wt%) were added in sequence. After each addition of each component, stirring was continued for 10 minutes to disperse the dispersion to obtain a dispersion liquid. According to the mass ratio of the dispersion liquid to the dispersion slurry A of 11.5:1, the dispersion slurry A was added and stirred at a high speed for 30 minutes and vacuum degassed to obtain a degassed slurry. 1-ethynyl-1-cycloethanol (0.5 wt%) was then added to obtain a mixed slurry B. Methyl hydrogen silicone oil and a platinum catalyst (1 wt%) were fully stirred and mixed to obtain a mixed slurry C. The mixed slurry B and the mixed slurry C were mixed at a weight ratio of 10:1 to obtain a thermal insulation adhesive.

[0085] The side surfaces of the optical adhesive layer and the polarizing layer 2 are spaced 200 μm from the inner side of the first groove 12. Thermal insulation adhesive is applied in this area. The height of the thermal insulation adhesive is 50 μm, flush with the upper surface of the polarizing layer 2, and the thickness of the thermal insulation adhesive is 200 μm, filling the above-mentioned spaced area.

[0086] After coating, the coating is cured in stages. The coating is heated to 50℃ at 2℃ / min for 1 hour for pre-curing, and then heated to 70℃ at 0.5℃ / min for 2 hours for main curing. Finally, the coating is cured at 100℃ for 0.5 hours to form a thermal insulation adhesive layer 3. Figure 4 As shown;

[0087] S4: As Figure 5As shown, a second groove 41 is formed by laser etching at the same edge position, and a color filter 4 of the same size is positioned and attached to the polarizing layer 2. The second groove 41 is opposite the first groove 12 of the glass substrate 1, and the edges of the color filter 4 and the glass substrate 1 extend beyond the edge of the thermal insulation adhesive layer 3 to form a protrusion. The protrusion is then locally heated and softened using a high-energy laser, and then sealed together. The heating center is located 50 μm from the edge, which is the location outside the first groove 12. During the heating and softening process, the first groove 12, the second groove 41 on the color filter 4, and the thermal insulation adhesive layer 3 all provide insulation. Furthermore, a He+5% H2 mixture is used for local cooling at the heated edge position to complete the interlayer welding operation. After encapsulation welding, a layer of edge seal 5 is formed on the outside of the thermal insulation adhesive layer 3, resulting in polarized glass. In the resulting polarized glass, a portion of the glass substrate 1 forms the glass base layer 6, a portion of the color filter 4 forms the color filter layer 7, and a two-layer encapsulation layer 3 and edge seal 5 are formed on the side of the polarizing layer 2. Figure 6 shown.

[0088] Example 2

[0089] This embodiment provides polarized glass and a preparation method thereof. The preparation method differs from that of embodiment 1 only in that, in step S2, azo-based materials are used instead of PVA and I2 to prepare the polarizing layer 2. The steps are adjusted as follows: according to the component ratio of PVA (11 wt%), azobenzene derivative dye (5 wt%), photoinitiator (1.5 wt%), leveling agent (0.3 wt%), and ethanol-propylene glycol methyl ether (82.2 wt%), a mixed solution of PVA and ethanol-propylene glycol methyl ether is first prepared into a PVA solution, and then an azobenzene derivative, photoinitiator, and leveling agent are added to prepare a photosensitizing dye solution. A photosensitive dye is spin-coated on the surface of the optical adhesive film layer using a coating machine to form a photosensitive dye. The film is formed into a 15μm thick film, with its edges aligned with the optical adhesive layer. The film is baked at 80°C for 3 minutes to remove any residual ethanol-propylene glycol methyl ether solvent. Linearly polarized light is incident perpendicularly on the surface of the glass substrate 1 facing away from the photosensitive dye coating, penetrating the glass substrate 1 and acting on the photosensitive dye film. The irradiation lasts for 10 minutes. Simultaneously with the linearly polarized light irradiation, unpolarized UV light is irradiated in the opposite direction to the linearly polarized light to trigger the photoinitiator and crosslink with the optical adhesive to the glass substrate 1. The plate is then heated to 60°C at a heating rate of 5°C / min and held for 30 minutes to eliminate internal stress. All other steps remain the same.

[0090] Example 3

[0091] This embodiment provides polarized glass and a method for preparing the same. The only difference between the preparation method and that of embodiment 1 is that no groove is provided on the color filter 4 in step S4. The schematic diagram of the color filter 4 in step S4 is as follows: Figure 7As shown, the other steps are the same.

[0092] Example 4

[0093] This embodiment provides polarized glass and a method for preparing the same. The only difference between the method and the first embodiment is that the glass substrate 1 in step S1 is not provided with a groove. Accordingly, the schematic diagram of providing the polarizing layer 2 in step S2 is as shown in FIG. Figure 8 As shown, the schematic diagram of setting the thermal insulation adhesive layer 3 in step S3 is as follows Figure 9 As shown, the color filter 4 in step S4 is not provided with grooves either. The schematic diagram of setting the color filter 4 in step S4 is as shown in FIG. Figure 10 As shown, the other steps are the same, and the coating position of the optical adhesive film layer remains unchanged, with a distance from the edge of the surface 11 of 50+150+200=400 μm. The other steps are the same.

[0094] Comparative Example 1

[0095] This comparative example provides polarized glass having a structure of a glass base layer - a transparent optical adhesive layer - a finished polarizer - a color filter layer. The surface dimensions of each layer are the same, and the side surfaces are not welded and packaged as in the embodiment. The finished polarizer has a laminated structure of a PSA pressure-sensitive adhesive layer - a compensation film layer - a PVA / I2 polarizing functional film layer - a PET support film layer.

[0096] Comparative Example 2

[0097] This comparative example provides polarized glass, which differs from Example 4 only in that no heat-insulating adhesive layer is provided. Other steps are the same.

[0098] Related performance tests and result analysis

[0099] 1. Moisture resistance related tests

[0100] The polarized glasses of Examples 1 to 4 and Comparative Example 1 were subjected to a high-intensity water vapor resistance test using a constant temperature and humidity test chamber and a spectrophotometer at 85°C ± 2°C, 85% RH ± 5% RH for 1000 h. The high-temperature and high-humidity treatment of each example was then tested using a CIE D65 light source in a constant temperature and humidity environment (23±2°C, 50±5% RH). The test results are recorded in Table 1.

[0101] 2. Heat resistance related tests

[0102] The polarized glasses of Examples 1-4 and Comparative Example 1 were subjected to a high-intensity heat resistance test using a thermal shock chamber and a spectrophotometer at a temperature range of -40°C to 85°C, 30 min / cycle, and 200 cycles. The cyclically treated examples were then tested using a CIE D65 light source in a constant temperature and humidity environment (23±2°C, 50±5% RH). The test results are recorded in Table 1.

[0103] Table 1

[0104]

[0105]

[0106] Table 1 shows that Examples 1 and 2 exhibit high transmittance due to the thermal insulation and buffering of the groove structure and the precision coating process that reduces interfacial scattering. Furthermore, Example 2's photo-oriented azobenzene molecules are more ordered, resulting in the lowest haze (0.2%). Comparative Example 1, on the other hand, exhibits the lowest transmittance and significantly increased haze (1.2%) due to reflection and absorption losses at the multilayer PET / PVA / PSA interface.

[0107] Examples 1 / 2 use a double groove + thermal insulation glue + laser edge sealing structure to form a full seal, the water vapor penetration path is blocked, and they exhibit the best heat and moisture resistance; the heat and moisture resistance of Examples 3 and 4 are second best, but overall they are better than the results of Comparative Examples 1 and 2.

[0108] During the manufacturing process for Example 3, grooves were incorporated only into the glass substrate, not the color filter. Consequently, the thermal insulation buffer during welding relied solely on the single-sided grooves and the thermal adhesive, resulting in reduced thermal stress dispersion. During testing, stress concentration during thermal shock and slight delamination occurred at the edges. In subsequent testing, moisture intrusion from the color filter side caused slight yellowing. In Example 4, neither the glass substrate nor the color filter had grooves, resulting in slightly worse test results than those of Example 3.

[0109] Comparative Example 2 has no grooves and thermal insulation glue, and the sides of the optical glue / polarizing layer are directly exposed. There is no thermal insulation glue filling and buffering. When subjected to hot and cold shock, the interfacial stress increases dramatically, resulting in edge cracking and blistering. Water vapor directly attacks the polarizing layer, causing obvious yellowing. For Comparative Example 1, water vapor / heat directly invades the finished polarizer containing a PET / PVA multi-layer structure (which is prone to delamination under wet heat), and the PSA glue has weak weather resistance, and the PVA absorbs moisture and swells, causing the polarizing function to completely fail.

[0110] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A method for preparing polarized glass, characterized in that: The steps include: A polarizing layer (2) is laminated on a surface (11) of a glass substrate (1); Thermal insulation glue is applied to the side of the polarizing layer (2), and solidified to form a thermal insulation glue layer (3), wherein the thermal insulation glue layer (3) surrounds the side of the polarizing layer (2); A color filter (4) is laminated on a surface of the polarizing layer (2) facing away from the glass substrate (1), and the edges of the glass substrate (1) and the color filter (4) both extend beyond the edge of the thermal insulation adhesive layer (3) to form a protrusion; The protruding portions of the glass substrate (1) and the color filter (4) are relatively bent and welded to form a sealed edge (5) on the outer side of the heat-insulating adhesive layer (3).

2. The preparation method according to claim 1, wherein: Along a direction parallel to the surface (11), the thickness of the thermal insulation adhesive layer (3) is 100 to 250 μm; and / or, the distance between the thermal insulation adhesive layer (3) and the edge of the surface (11) is 150 to 300 μm; And / or, the thermal insulation adhesive includes the following components: silicone resin, thermal insulation filler, boron nitride, dispersant, surface modifier, and light shielding agent.

3. The preparation method according to claim 1 or 2, characterized in that: The stacking and setting of the polarizing layer (2) comprises the following steps: coating a mixed solution of polyvinyl alcohol and iodine on the surface (11) to form a film layer; The film layer is subjected to an orientation treatment to orient the iodine molecules, and then subjected to a drying treatment at a preset temperature to obtain the polarizing layer (2).

4. The preparation method according to claim 1 or 2, characterized in that: The stacking and setting of the polarizing layer (2) comprises the following steps: Obtaining a photosensitive solution, wherein the photosensitive solution is prepared from raw materials including polyvinyl alcohol, an azo material, and a photoinitiator; coating the photosensitive solution on the surface (11) to form a photosensitive layer; The photosensitive layer is vertically irradiated with non-polarized ultraviolet light in a direction from the photosensitive layer to the surface (11) to cause a cross-linking reaction, and the glass substrate (1) and the photosensitive layer are irradiated with linearly polarized light in a direction opposite to the non-polarized ultraviolet light to obtain the polarizing layer (2).

5. The preparation method according to claim 1 or 2, characterized in that The stacking and setting of the polarizing layer (2) comprises the following steps: A first groove (12) is provided around the surface (11) of the glass substrate (1), wherein the first groove (12) encloses and forms a central area of ​​the surface (11); The polarizing layer (2) is stacked in the central area.

6. The preparation method according to claim 5, characterized in that: The depth of the first groove (12) is 50 to 150 μm; And / or, the distance between the first groove (12) and the edge of the polarizing layer (2) is 200 to 400 μm; And / or, the distance between the first groove (12) and the edge of the surface (11) is 50-100 μm.

7. The preparation method according to claim 5, characterized in that: A second groove (41) is also provided on one surface of the color filter (4). When the color filter (4) is stacked, the second groove (41) is arranged opposite to the first groove (12).

8. A polarized glass prepared by the method according to any one of claims 1 to 7, characterized in that: include: A glass substrate (6), a polarizing layer (2), a color filter layer (7), the heat-insulating adhesive layer (3), and the edge sealing (5); The glass substrate (6), the polarizing layer (2), and the color filter layer (7) are stacked in sequence; the edge seal (5) is enclosed and sealed on the side of the stacked structure formed by the glass substrate (6), the polarizing layer (2), and the color filter layer (7); and the heat-insulating adhesive layer (3) is filled and arranged between the side of the polarizing layer (2) and the edge seal (5).

9. The polarizing glass according to claim 8, wherein: The thickness of the glass substrate (6) is 100 to 2000 μm; and / or, the polarizing layer (2) has a thickness of 10 to 50 μm; And / or, the material of the polarizing layer (2) includes polyvinyl alcohol and a dye, and the dye includes at least one of iodine, azo, and anthraquinone; and / or, the color filter layer (7) has a thickness of 300 to 700 μm; And / or, along a direction parallel to the bonding surface of the glass substrate (6) and the polarizing layer (2), the thickness of the edge seal (5) is 100 to 200 μm.

10. A liquid crystal panel, characterized in that: The invention comprises a liquid crystal layer and polarized glass prepared by the preparation method according to any one of claims 1 to 7 or the polarized glass according to claim 8 or 9, wherein the liquid crystal layer and the polarized glass are stacked.

Images