Polarizer, preparation method thereof and display module

Abstract

The embodiment of the invention provides a polaroid, a preparation method of the polaroid and a display module. The display panel comprises a polarizing material layer, a first film layer and a second film layer. Wherein the first film layer is located on one side of the polarizing material layer; the second film layer is located on the side, away from the first film layer, of the polarizing material layer. At least one of the first film layer and the second film layer includes a cooling region. The cooling area is arranged on the surface of the first film layer or the second film layer of the polaroid, the cooling effect can be achieved in the laser cutting process, the temperature of the polaroid near the laser cutting area is reduced, the influence of the heat effect on the polaroid is reduced, and then the quality of the polaroid and the display effect of the corresponding display module are improved.

Description

Technical Field

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

[0002] Laser cutting uses a focused high-power density laser beam to irradiate the workpiece, causing the irradiated material to melt, vaporize, ablate or reach the ignition point quickly, and at the same time uses a high-speed airflow coaxial with the beam to blow away the molten material, thereby cutting the workpiece. Laser cutting is one of the thermal cutting methods, with the advantages of fast speed, high precision and smooth cuts, and is increasingly favored by companies. For example, more and more users use laser beams to irradiate polarizers for laser cutting.

[0003] However, the laser cutting process in the prior art will affect the quality of the polarizer, thereby causing display abnormalities in the display module, etc. Summary of the invention

[0004] The embodiments of the present application provide a polarizer, a method for preparing a polarizer, and a display module, so as to improve the problem that the quality of the polarizer is affected during the laser cutting process.

[0005] In a first aspect, a polarizer is provided, the polarizer comprising a polarizing material layer, a first film layer and a second film layer, wherein the first film layer is located on one side of the polarizing material layer; the second film layer is located on the side of the polarizing material layer away from the first film layer; and at least one of the first film layer and the second film layer comprises a cooling area.

[0006] In combination with the first aspect, in certain implementations of the first aspect, in the cooling region, a surface of the first film layer and / or the second film layer is coated with a condensing agent;

[0007] In combination with the first aspect, in certain implementations of the first aspect, the surface is a surface of the first film layer and / or the second film layer that is away from the polarizing material layer.

[0008] In combination with the first aspect, in certain implementations of the first aspect, the condensing agent includes a hydrogel layer.

[0009] In combination with the first aspect, in certain implementations of the first aspect, in the cooling region, the first film layer and / or the second film layer includes condensation material.

[0010] In combination with the first aspect, in certain implementations of the first aspect, the condensing material includes at least one of carbamate and sodium carbonate.

[0011] In combination with the first aspect, in certain implementations of the first aspect, in the cooling region, a surface of the first film layer and / or the second film layer is coated with a heat absorbing material.

[0012] In combination with the first aspect, in certain implementations of the first aspect, the hole region is included, and the cooling area surrounds the hole region.

[0013] In combination with the first aspect, in certain implementations of the first aspect, a maximum distance between an inner edge and an outer edge of the cooling area is greater than or equal to 2 mm.

[0014] In combination with the first aspect, in some implementations of the first aspect, the device includes an edge region, the edge region surrounds a cooling region, and the cooling region is located between the edge region and the center of the polarizer;

[0015] In combination with the first aspect, in certain implementations of the first aspect, a maximum distance between an inner edge and an outer edge of the cooling area is greater than or equal to 2 mm.

[0016] In combination with the first aspect, in certain implementations of the first aspect, the cooling area includes the entire area of ​​the first film layer and / or the second film layer.

[0017] In a second aspect, a method for preparing a polarizer is provided, comprising:

[0018] providing a polarizing material layer;

[0019] Attaching a first film layer to one side of the polarizing material layer;

[0020] The second film layer is attached to a side of the polarizing material layer away from the first film layer; wherein at least one of the first film layer and the second film layer includes a cooling area.

[0021] In a third aspect, a display module is provided, comprising any of the polarizers described above.

[0022] The embodiments of the present application provide a polarizer, a method for preparing a polarizer, and a display module. The display panel includes a polarizing material layer, a first film layer, and a second film layer. The first film layer is located on one side of the polarizing material layer; the second film layer is located on the side of the polarizing material layer away from the first film layer; and at least one of the first film layer and the second film layer includes a cooling area.

[0023] The present application sets a cooling area on the surface of the first film layer or the second film layer of the polarizer, which can play a cooling role during the laser cutting process to reduce the temperature of the polarizer near the laser cutting area, thereby reducing the impact of thermal effects on the polarizer, and further improving the quality of the polarizer and the display effect of the corresponding display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0025] Figure 1 Schematic diagram of the cross-sectional structure of a polarizer in one embodiment of the present application.

[0026] Figure 2 for Figure 1 Top view of the polarizer shown.

[0027] Figure 3 Schematic diagram of the cross-sectional structure of a polarizer in another embodiment of the present application.

[0028] Figure 4 Schematic diagram of the cross-sectional structure of a polarizer in another embodiment of the present application.

[0029] Figure 5 Schematic diagram of the cross-sectional structure of a polarizer in another embodiment of the present application.

[0030] Figure 6 Schematic diagram of the cross-sectional structure of a polarizer in one embodiment of the present application.

[0031] Figure 7 This is a top view of a polarizer in another embodiment of the present application.

[0032] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure of the polarizer shown at AA'.

[0033] Fig. 9 Schematic diagram of the cross-sectional structure of a polarizer in another embodiment of the present application.

[0034] Fig.10 Schematic diagram of the cross-sectional structure of a polarizer in another embodiment of the present application.

[0035] Fig.11 Schematic diagram of the cross-sectional structure of a polarizer in another embodiment of the present application.

[0036] Fig.12 This is a top view of a polarizer in another embodiment of the present application.

[0037] Fig.13 This is a top view of a polarizer in another embodiment of the present application.

[0038] Fig.14 for Fig.13 Schematic diagram of the cross-sectional structure of the polarizer at BB'.

[0039] Fig.15 Flow chart of a method for preparing a display panel in one embodiment of the present application. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application. The features and exemplary embodiments of various aspects of the present application will be described in detail below.

[0041] As mentioned in the background technology, the laser cutting process in the prior art will affect the quality of the polarizer, thus causing display abnormalities in the display module and other problems. Specifically, there is a thermal effect in the laser cutting process of the polarizer, which causes black edges or yellowing problems at the cutting position of the polarizer. The black edges or yellowing increase the risk of carbonization, and particles will fall off after carbonization, affecting the cleanliness and causing display abnormalities and other problems.

[0042] In view of this, the present application provides a polarizer, a method for preparing a polarizer, and a display module. The present application provides a cooling area on the surface of the first film layer or the second film layer of the polarizer, which can play a cooling role during the laser cutting process to reduce the temperature of the polarizer near the laser cutting area, thereby reducing the influence of thermal effects on the polarizer, thereby improving the quality of the polarizer and the display effect of the corresponding display module.

[0043] In one embodiment, the polarizer includes a polarizing material layer, a first film layer, and a second film layer. The first film layer is located on one side of the polarizing material layer; the second film layer is located on the side of the polarizing material layer away from the first film layer; at least one of the first film layer and the second film layer includes a cooling area, specifically Figure 1-Figure 4 Take this as an example to illustrate.

[0044] Figure 1 is a schematic diagram of the cross-sectional structure of a polarizer in one embodiment of the present application, Figure 2 for Figure 1 The top view of the polarizer shown in FIG. Figure 1 and Figure 2 As shown, the polarizer includes a polarizing material layer 10, a first film layer 20 and a second film layer 30. The first film layer 20 is located on one side of the polarizing material layer 10, and the second film layer 30 is located on the side of the polarizing material layer 10 away from the first film layer 10. In addition, the first film layer 20 includes a first cooling area 21, and the second film layer 30 includes a second cooling area 31.

[0045] In this embodiment, cooling areas are set on the surfaces of the first film layer and the second film layer of the polarizer at the same time, which can play a stronger cooling role during the laser cutting process, so as to reduce the temperature of the polarizer near the laser cutting area, thereby reducing the influence of thermal effects on the polarizer, and further improving the quality of the polarizer and the display effect of the corresponding display module.

[0046] In this embodiment, the cooling area includes the entire area of ​​the first film layer and / or the second film layer. In other words, the orthographic projection of the first cooling area 21 on the first film layer 20 covers the entire surface of the first film layer 20 on the side away from the polarizing material layer 10; the orthographic projection of the second cooling area 31 on the second film layer 30 covers the entire surface of the second film layer 30 on the side away from the polarizing material layer 10.

[0047] In one embodiment, the top view of the polarizer is Figure 2 The square shape shown may also include a circle, an ellipse, or other shapes required by the display module.

[0048] In one embodiment, the polarizer further includes a triacetyl cellulose film layer between the polarizing material layer and the first film layer and a pressure-sensitive adhesive layer between the polarizing material layer and the second film layer. The triacetyl cellulose film layer has high light transmittance, good water resistance and certain mechanical strength, and is usually used to protect the polarizing material layer. The pressure-sensitive adhesive layer is used to adhere the polarizer to other optical elements or devices to ensure the stability and firmness of the polarizer.

[0049] In one embodiment, a cooling area may be provided only in the first film layer or only in the second film layer. Figure 3 and Figure 4 shown. Figure 3 FIG. 1 is a schematic diagram of a cross-sectional structure of a polarizer in another embodiment of the present application. Figure 3 In the polarizer shown, the first cooling area 21 is only provided on the surface of the first film layer 20 on the side facing away from the polarizing material layer 10 . Figure 4 FIG. 2 is a schematic diagram of a cross-sectional structure of a polarizer in another embodiment of the present application. Figure 4 In the polarizer shown, the second cooling region 31 is only provided on the side of the second film layer 30 facing away from the polarizing material layer 10 .

[0050] In one embodiment, in the cooling area, the surface of the first film layer and / or the second film layer is coated with a condensing agent. Specifically, the surface is the surface of the first film layer and / or the second film layer facing away from the polarizing material layer. Figure 1 As shown, in the first cooling region 21, the surface of the first film layer 20 facing away from the polarizing material layer 10 is coated with a condensing agent to form a first condensing layer 22. In the second cooling region 31, the surface of the second film layer 30 facing away from the polarizing material layer 10 is also coated with a condensing agent to form a second condensing layer 32.

[0051] In this embodiment, the cooling area is formed by coating the condensing agent, which is simple and easy to operate, highly adaptable and cost-saving. In addition, the coating process is highly flexible and can be implemented in a variety of ways, such as gravure roller coating, dip coating, narrow coating or spray coating, which provides flexibility for production and allows the selection of a suitable coating method according to specific production requirements.

[0052] In this embodiment, the condensing agent is a common chemical substance that can reduce the temperature of an object and is used in cooling, solidification and other related applications. The working principle of the condensing agent is based on the principle of thermodynamics, using the phase change process of the substance to absorb heat and reduce the temperature. When they come into contact with the cooled object, they absorb heat and cause their own temperature to drop, thereby reducing the temperature of the cooled object to a certain extent.

[0053] In one embodiment, the condensing agent includes a hydrofluorocarbon and a hydrocarbon.

[0054] In one embodiment, the condensing agent includes nanocellulose, which is more suitable for application to lightweight objects.

[0055] In one embodiment, the condensing agent comprises a hydrogel layer, which reduces application costs.

[0056] In one embodiment, no other film layer is located on the side of the first film layer 20 away from the polarizing material layer 10, and no other film layer is located on the side of the second film layer 30 away from the polarizing material layer 10. In other words, the first film layer 20 and the third film layer 30 are both the outermost film layers in the polarizer structure.

[0057] In one embodiment, the first film layer 20 includes a protective film layer. The protective film layer may be a temporary protective layer that needs to be torn off before the polarizer is installed in the display module. This protective film is mainly used to prevent the polarizer from being scratched or contaminated during transportation and assembly. In this way, there is no need to consider whether the condensing agent coated on the surface of the first film layer 20 or the second film layer 30 will affect the optical properties of the polarizer.

[0058] In one embodiment, the second film layer 30 includes a release film layer. The release film layer in the polarizer structure usually plays a role of temporary protection and support during the manufacture and use of the polarizer, and supports the various layers of the polarizer to remain stable during the steps of lamination and cutting. Before the polarizer is finally installed on the display module, it is usually necessary to peel off the release film layer. This is because the release film layer is not used to directly contact the display module, and its main function is to protect the polarizer from damage before assembly. With this arrangement, there is no need to consider whether the condensing agent coated on the surface of the first film layer 20 or the second film layer 30 will affect the optical properties of the polarizer.

[0059] In one embodiment, in the cooling region, the first film layer and / or the second film layer comprises condensing material therein.

[0060] In one embodiment, the condensed material is present in the first film layer or the second film layer in a doped state, specifically as follows: Figure 5 As shown, Figure 5 The cross-sectional structure diagram of the polarizer in another embodiment of the present application is shown in FIG. The cooling area is formed by doping the condensation material, which can be completed in one step during the production process of the first film layer 20 or the second film layer 30 without adding a coating process, thus reducing the process steps and simplifying the process.

[0061] In one embodiment, the condensing material includes at least one of a carbamate and sodium carbonate.

[0062] In one embodiment, in the cooling area, the surface of the first film layer or the second film layer is coated with a heat absorbing material. Specifically, the surface is the surface of the first film layer and / or the second film layer on the side away from the polarizing material layer.

[0063] Figure 6 FIG. 1 is a schematic diagram of the cross-sectional structure of a polarizer in an embodiment of the present application. Figure 6 Therefore, in the first cooling region 21, the surface of the first film layer 20 on the side away from the polarizing material layer 10 is coated with a heat absorbing material to form a first heat absorbing layer 23. In the second cooling region 31, the surface of the second film layer 30 on the side away from the polarizing material layer 10 is also coated with a condensing agent to form a second heat absorbing layer 33. In this embodiment, by providing the first heat absorbing layer 23 and the second heat absorbing layer 33, the heat absorbing material can play a stronger cooling role during the laser cutting process, so as to reduce the temperature of the polarizer near the laser cutting area, thereby reducing the influence of the thermal effect on the polarizer, and further improving the quality of the polarizer and the display effect of the corresponding display module.

[0064] In one embodiment, the heat absorbing material includes black uniform resin particles.

[0065] In one embodiment, the first film layer 20 includes a protective film layer, and the second film layer 30 includes a release film layer. The release film layer and the protective film layer in the polarizer structure usually play a role of temporary protection and support during the manufacture and use of the polarizer, and the various layers of the support polarizer remain stable during the steps of lamination and cutting. Before the polarizer is finally installed on the display module, it is usually necessary to peel off the protective film layer and the release film layer. This is because the protective film layer and the release film layer are not used to directly contact the display module, and its main function is to protect the polarizer from damage before assembly. With this arrangement, there is no need to consider whether the condensing agent coated on the surface of the first film layer 20 or the second film layer 30 will affect the optical properties of the polarizer.

[0066] In one embodiment, the polarizer includes a hole area, and the cooling area surrounds the hole area. Figure 7-Figure 11 To illustrate with examples.

[0067] Figure 7 is a top view of a polarizer in another embodiment of the present application, Figure 8 for Figure 7 The cross-sectional structure diagram of the polarizer at the A-A' position is shown in FIG. Figure 7 and Figure 8 As shown, the polarizer includes a hole area 1, the first film layer 20 includes a third cooling area 24, the second film layer 30 includes a fourth cooling area 34, the third cooling area 24 surrounds the hole area 1, and the fourth cooling area 34 surrounds the hole area 1.

[0068] In this embodiment, a third cooling area 24 and a fourth cooling area 34 are simultaneously arranged on the surfaces of the first film layer 20 and the second film layer 30 of the polarizer around the hole area 1. This can play a good cooling role in the process of laser cutting to form the hole 1, so as to reduce the temperature of the polarizer near the hole area 1, thereby reducing the influence of thermal effects on the polarizer and reducing the risk of yellow edges / black edges, thereby improving the quality of the polarizer and the display effect of the corresponding display module.

[0069] In one embodiment, the maximum distance D between the inner edge and the outer edge of the cooling zone is greater than or equal to 2 mm. Figure 7 and Figure 8 The reason for this setting is that the applicant has found through multiple tests that the yellowing / blackening range of the polarizer during laser cutting is about 0.1mm. Setting D greater than or equal to 2mm ensures that the cooling area completely covers the risk range of yellowing / blackening, thereby better reducing the temperature of the polarizer during laser cutting and protecting the quality of the polarizer from being affected.

[0070] In one embodiment, a cooling area may be provided only in the first film layer or only in the second film layer. Fig. 9 and Fig.10 shown. Fig. 9 FIG. 1 is a schematic diagram of a cross-sectional structure of a polarizer in another embodiment of the present application. Fig. 9 In the polarizer shown, the third cooling area 24 is only provided on the surface of the first film layer 20 on the side facing away from the polarizing material layer 10 . Fig.10 FIG. 2 is a schematic diagram of a cross-sectional structure of a polarizer in another embodiment of the present application. Fig.10 In the polarizer shown, the fourth cooling region 34 is only provided on the side of the second film layer 30 facing away from the polarizing material layer 10 .

[0071] In one embodiment, the third cooling area 23 and the fourth cooling area 34 can form a condensation layer by applying a condensing agent. The condensing agent includes one of a hydrofluorocarbon, a hydrocarbon, nanocellulose and a hydrogel layer. Among them, nanocellulose is more suitable for application to lightweight objects, and the hydrogel layer is more conducive to reducing costs.

[0072] In one embodiment, the third cooling area 23 and the fourth cooling area 34 may be coated with a heat absorbing material to form a heat absorbing layer. The heat absorbing material includes black uniform resin particles.

[0073] In one embodiment, the condensed material is present in the first film layer or the second film layer in a doped state, specifically as follows: Fig.11 As shown, Fig.11 The cross-sectional structure diagram of the polarizer in another embodiment of the present application is shown in FIG. The cooling area is formed by doping the condensation material, which can be completed in one step during the production process of the first film layer 20 or the second film layer 30 without adding a coating process, thus reducing the process steps and simplifying the process.

[0074] Fig.12 FIG. 1 is a top view of a polarizer in another embodiment of the present application. Fig.12 As shown, the cooling area is arranged around the hole area 1, and the vertical distance between the edge of the cooling area and the center of the hole area 1 is equal. In this way, a relatively uniform cooling area can be formed, so that the temperature around the hole area is uniformly reduced.

[0075] In one embodiment, the polarizer further includes an edge region, the edge region surrounds a cooling region, and the cooling region is located between the edge region and the center of the polarizer. Fig.13 and Fig.14 shown. Fig.13 is a top view of a polarizer in another embodiment of the present application, Fig.14 for Fig.13 The cross-sectional structure diagram of the polarizer at BB' is shown. Fig.13 and Fig.14 As shown, the polarizer includes an edge region 2, a fifth cooling region 25 is disposed on the surface of the first film layer 20 on the side facing away from the polarizing material layer 10, and a sixth cooling region 35 is disposed on the surface of the second film layer 30 on the side facing away from the polarizing material layer 10. The edge region 2 surrounds the fifth cooling region, or the edge region 2 surrounds the sixth cooling region. Moreover, the fifth cooling region 25 and the sixth cooling region 35 are both located between the edge region 2 and the center C of the polarizer, that is, the fifth cooling region 25 and the sixth cooling region 35 both surround the center C of the polarizer.

[0076] In this embodiment, a fifth cooling area 25 is set on the surface of the first film layer 20 of the polarizer, and a sixth cooling area 35 is set on the surface of the second film layer 30, so that the fifth cooling area 25 and the sixth cooling area 35 can play a good cooling role in the process of laser cutting the edge of the polarizer, so as to reduce the temperature of the polarizer near the laser cutting area, thereby reducing the influence of thermal effect on the polarizer, and further improving the quality of the polarizer and the display effect of the corresponding display module.

[0077] In one embodiment, the maximum distance D between the inner edge and the outer edge of the fifth cooling area 25 and the sixth cooling area 35 is greater than or equal to 2 mm. This is set because the applicant has found through multiple experiments that the yellowing / blackening range of the polarizer during the laser cutting process is about 0.1 mm. Setting D greater than or equal to 2 mm ensures that the cooling area completely covers the risk range of yellowing / blackening, thereby better reducing the temperature of the polarizer during the laser cutting process and protecting the quality of the polarizer from being affected.

[0078] In one embodiment, the cooling area may be provided only on the first film layer or only on the second film layer. That is, the fifth cooling area 25 may be provided only on the surface of the first film layer 20 facing away from the polarizing material layer 10, or the sixth cooling area 35 may be provided only on the surface of the second film layer 30 facing away from the polarizing material layer 10.

[0079] In one embodiment, the fifth cooling region 25 and the sixth cooling region 35 can form a condensation layer by applying a condensing agent. The condensing agent includes one of a hydrofluorocarbon, a hydrocarbon, nanocellulose and a hydrogel layer. Among them, nanocellulose is more suitable for application to lightweight objects, and the hydrogel layer is more conducive to reducing costs.

[0080] In one embodiment, the fifth cooling region 23 and the sixth cooling region 35 may be coated with a heat absorbing material to form a heat absorbing layer. The heat absorbing material includes black uniform resin particles.

[0081] In one embodiment, the condensing material exists in the first film layer or the second film layer in a doped state. The cooling area is formed by doping the condensing material, which can be completed at one time during the production process of the first film layer 20 or the second film layer 30 without adding a coating process, reducing the process steps and simplifying the process.

[0082] The present application also provides a method for preparing a polarizer, the specific steps are as follows: Fig.15 As shown, Fig.15 Flow chart of a method for preparing a polarizer in one embodiment of the present application. Fig.15 As shown, the specific steps of the method for preparing the display panel in this embodiment are as follows:

[0083] S1510: providing a polarizing material layer.

[0084] S1520: attaching a first film layer to one side of the polarizing material layer.

[0085] S1530: attaching a second film layer to a side of the polarizing material layer away from the first film layer; wherein at least one of the first film layer and the second film layer includes a cooling area.

[0086] The present application sets a cooling area on the surface of the first film layer or the second film layer of the polarizer, which can play a cooling role during the laser cutting process to reduce the temperature of the polarizer near the laser cutting area, thereby reducing the impact of thermal effects on the polarizer, and further improving the quality of the polarizer and the display effect of the corresponding display module.

[0087] In one embodiment, the cooling area is formed by later coating a condensing agent on the surface of the first film layer or the second film layer.

[0088] In one embodiment, the cooling zone is formed by adding a condensing material to the first film layer or the second film layer.

[0089] In one embodiment, the cooling area is formed by coating a heat absorbing material on the surface of the first film layer or the second film layer.

[0090] In one embodiment, the first film layer and the second film layer are both film layers farthest from the polarizing material layer, and are film layers that need to be removed before the polarizer is applied to the display module.

[0091] The present application also provides a display module, including any of the polarizers mentioned above. Since the display module adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, that is, the probability of yellowing / blackening of the polarizer in the display module is greatly reduced, thereby improving the display effect of the display module.

[0092] In one embodiment, the first film layer and the second film layer of the polarizer are both the film layers farthest from the polarizing material layer and are the film layers that need to be removed before the polarizer is applied to the display module. Therefore, the polarizer structure in the display module does not include the first film layer and the second film layer.

[0093] In one embodiment, the first film layer of the polarizer includes a protective film layer, and the second film layer includes a release film layer.

[0094] In one embodiment, the display module further includes a display screen body located on one side of the polarizer, and a cover layer located on a side of the polarizer away from the display screen body.

[0095] The present application also provides a display device, including any of the above display modules. The display device can be any device with a display function, such as a mobile phone, a tablet computer, a laptop computer, a PDA, a vehicle-mounted electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (PDA), etc., or a non-mobile device such as a personal computer (PC), a television (TV), a teller machine, or a self-service machine.

[0096] It should be noted that in the drawings of the present application document, the sizes of layers and regions may be exaggerated for clarity of illustration. It is also understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it is understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it may be the only layer between the two layers or two elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0097] In addition, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements defined by the statement "include..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements.

[0098] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0099] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A polarizer, characterized in that: include: A polarizing material layer; A first film layer, located on one side of the polarizing material layer; as well as A second film layer, located on a side of the polarizing material layer away from the first film layer; Wherein, at least one of the first film layer and the second film layer includes a cooling area.

2. The polarizer according to claim 1, characterized in that: In the cooling area, the surface of the first film layer and / or the second film layer is coated with a condensing agent; Preferably, the surface is a surface of the first film layer and / or the second film layer on a side away from the polarizing material layer; Preferably, the condensing agent comprises a hydrogel layer.

3. The polarizer according to claim 1, characterized in that: In the cooling region, the first film layer and / or the second film layer include condensation material; Preferably, the condensing material comprises at least one of carbamate and sodium carbonate.

4. The polarizer according to claim 1, characterized in that: In the cooling area, the surface of the first film layer and / or the second film layer is coated with a heat absorbing material.

5. The polarizer according to claim 1, characterized in that: A hole region is included, and the cooling zone surrounds the hole region.

6. The polarizer according to claim 5, characterized in that: The maximum distance between the inner edge and the outer edge of the cooling zone is greater than or equal to 2 mm.

7. The polarizer according to claim 5, characterized in that: comprising an edge region, the edge region surrounding the cooling region, the cooling region being located between the edge region and the center of the polarizer; Preferably, the maximum distance between the inner edge and the outer edge of the cooling zone is greater than or equal to 2 mm.

8. The polarizer according to claim 1, characterized in that: The first film layer includes a protective film layer; Preferably, the second film layer comprises a release film layer; Preferably, the cooling area includes the entire area of ​​the first film layer and / or the second film layer.

9. A method for preparing a polarizer, characterized in that: include: providing a polarizing material layer; Attaching a first film layer to one side of the polarizing material layer; A second film layer is attached to a side of the polarizing material layer that is away from the first film layer; wherein at least one of the first film layer and the second film layer includes a cooling area.

10. A display module, characterized in that: A polarizer comprising the polarizer described in any one of claims 1 to 8.

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