Polarizing plate, liquid crystal panel, and display device

Abstract

The application discloses a polarizer, a liquid crystal panel and a display device, relates to the technical field of display, and discloses a polarizer, which comprises a first protective layer, a first triangular prism array structure, a polarization layer, a second triangular prism array structure and a second protective layer which are sequentially stacked. The application effectively improves the light condensation capacity of the polarizer.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a polarizer, a liquid crystal panel, and a display device. Background Technology

[0002] In display technology and optical systems, polarizers, as one of the core optical components, are widely used in liquid crystal displays, OLEDs (Organic Light-Emitting Diodes), augmented reality (AR) devices, and various optical instruments. A typical polarizer is composed of a layer of dyed and stretched polyvinyl alcohol (PVA) film and protective films of cellulose triacetate (TAC) on both sides. Its main function is to selectively absorb light vibration components in specific polarization directions, thereby outputting linearly polarized light.

[0003] However, in practical applications, the structural design of polarizers only focuses on achieving polarization performance, while neglecting the effective control of the light propagation path. This results in poor light-gathering ability of polarizers. Therefore, in actual use, polarizers often cause some light to be scattered or lost, thereby reducing the overall light energy utilization rate of the system. Utility Model Content

[0004] The main objective of this application is to provide a polarizer, a liquid crystal panel, and a display device. This application effectively improves the light-gathering ability of the polarizer.

[0005] To achieve the above objectives, embodiments of this application provide a polarizer, which includes a first protective layer, a first structure of a triangular prism array, a polarizing layer, a second structure of a triangular prism array, and a second protective layer stacked sequentially.

[0006] In one embodiment, the ridge direction of the first structure of the triangular prism array is perpendicular to the ridge direction of the second structure of the triangular prism array.

[0007] In one embodiment, the refractive index of the first structure of the triangular prism array is greater than the refractive index of the functional layer adjacent to it in the polarizer;

[0008] The refractive index of the second structure of the triangular prism array is greater than the refractive index of the functional layer adjacent to it in the polarizer.

[0009] In one embodiment, the apex angles of both the first and second triangular prism array structures face the light-emitting side of the polarizer.

[0010] In one embodiment, the polarizer further includes:

[0011] A first adhesive layer is disposed between the first protective layer and the first structure of the triangular prism array;

[0012] A second adhesive layer is disposed between the polarizing layer and the second structure of the triangular prism array.

[0013] In one embodiment, the apex angle of the first structure of the triangular prism array is 88° to 92°.

[0014] In one embodiment, the apex angle of the second structure of the triangular prism array is 88° to 92°.

[0015] In one embodiment, the spacing between adjacent triangular prisms in the first structure of the triangular prism array is 50–70 μm.

[0016] In one embodiment, the spacing between adjacent triangular prisms in the second structure of the triangular prism array is 50–70 μm.

[0017] In one embodiment, the polarizer further includes an adhesive layer, which is disposed between the first protective layer and the first structure of the triangular prism array, and between the polarizing layer and the second structure of the triangular prism array.

[0018] In addition, to achieve the above objectives, this application also proposes a liquid crystal panel, which includes a polarizer as described above.

[0019] In addition, to achieve the above objectives, this application also proposes a display device, which includes a polarizer as described above.

[0020] In one embodiment, the display device includes: a backlight module;

[0021] The diffuser plate of the backlight module is adjacent to the polarizer.

[0022] One or more technical solutions proposed in this application have at least the following technical effects: A polarizer is provided, comprising a first protective layer, a first triangular prism array structure, a polarizing layer, a second triangular prism array structure, and a second protective layer stacked sequentially. By setting a triangular prism array structure (i.e., the first and second triangular prism array structures) in the polarizer, when light enters the triangular prism array structure, due to the difference in refractive index between different media, the light is refracted at the interface of the prisms, thus being guided to a specific direction, making the originally divergent light more concentrated, thereby improving light energy utilization and display brightness, and enhancing the overall light-gathering effect of the polarizer. Furthermore, by setting multiple triangular prism array structures, multi-level light control is achieved, enhancing the convergence effect of light in multiple dimensions, thereby achieving a more uniform and efficient light-gathering effect. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a conventional polarizer;

[0024] Figure 2 This is a schematic diagram of the display device.

[0025] Figure 3 This is a schematic diagram of the structure of a conventional LCD panel;

[0026] Figure 4 This is a schematic diagram of the structure of the polarizer involved in the embodiments of this application. Figure 1 ;

[0027] Figure 5 This is a schematic diagram of light propagation in the triangular prism array structure involved in the embodiments of this application;

[0028] Figure 6 This is a schematic diagram of the structure of the polarizer involved in the embodiments of this application. Figure 2 ;

[0029] Figure 7 This is a schematic diagram of the structure of the display device involved in the embodiments of this application.

[0030] Explanation of reference numerals in the attached figures

[0031] 10. Liquid crystal panel; 111. First polarizer; 12. First glass substrate; 13. Thin film transistor;

[0032] 14. Liquid crystal layer; 15. Optical filter; 16. Second glass substrate; 17. Second polarizer;

[0033] 101. TAC layer; 102. Pressure-sensitive adhesive layer; 103. PVA layer;

[0034] 100. Polarizing film; 110. First protective layer; 120. First adhesive layer;

[0035] 130. First structure of triangular prism array; 140. Polarizing layer; 150. Second adhesive layer;

[0036] 160. Second structure of triangular prism array; 170. Second protective layer;

[0037] 20. Backlight module; 21. Concentrating film; 22. Diffuser plate.

[0038] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall apply. Reagents or instruments whose manufacturers are not specified are all conventional products that can be purchased commercially.

[0040] The following detailed description, with appropriate reference to the accompanying drawings, specifically discloses embodiments of the polarizer, liquid crystal panel, and display device of this application. However, unnecessary detailed descriptions may be omitted. For example, detailed descriptions of well-known matters and repetitive descriptions of essentially the same structures may be omitted. This is to avoid unnecessarily lengthy descriptions and to facilitate understanding by those skilled in the art. Furthermore, the accompanying drawings and the following description are provided for the purpose of enabling those skilled in the art to fully understand this application and are not intended to limit the subject matter of the claims.

[0041] The "range" disclosed in this application is defined by a lower limit and an upper limit. A given range is defined by selecting a lower limit and an upper limit, which define the boundaries of a particular range. Ranges defined in this way can include or exclude endpoints and can be arbitrarily combined; that is, any lower limit can be combined with any upper limit to form a range. For example, if ranges of 60–120 and 80–110 are listed for a specific parameter, it is understood that ranges of 60–110 and 80–120 are also expected. Furthermore, if minimum range values ​​of 1 and 2 are listed, and if maximum range values ​​of 3, 4, and 5 are listed, then the following ranges are all expected: 1–3, 1–4, 1–5, 2–3, 2–4, and 2–5. In this application, unless otherwise stated, the numerical range "a–b" represents a shortened representation of any combination of real numbers between a and b, where a and b are real numbers. For example, the numerical range "0~5" indicates that all real numbers between "0~5" have been listed in this article; "0~5" is simply a shortened representation of these numerical combinations. Furthermore, when a parameter is stated as an integer ≥2, it is equivalent to disclosing that the parameter is, for example, an integer such as 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0042] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0043] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0044] Unless otherwise specified, all steps in this application may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), indicating that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, the mention that the method may also include step (c) indicates that step (c) may be added to the method in any order. For example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc.

[0045] Unless otherwise specified, the terms "comprising" and "including" as used in this application can be open-ended or closed-ended. For example, "comprising" and "including" can mean that other components not listed may also be included, or that only the listed components may be included.

[0046] Unless otherwise specified, the term "or" is inclusive in this application. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, the condition "A or B" is satisfied by any of the following conditions: A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); or both A and B are true (or exist).

[0047] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the technical solution of this application is further described below in conjunction with the accompanying drawings and embodiments. However, this application is not limited to the listed embodiments, but should also include any other well-known modifications within the scope of the claims made in this application.

[0048] The term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of this application. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0049] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0050] In related technologies, refer to Figure 1Conventional polarizers typically consist of a TAC (cellulose triacetate) layer 101, a pressure-sensitive adhesive layer 102, a PVA (polyvinyl alcohol) layer 103, and a TAC layer 101 stacked sequentially. The PVA layer 103 serves as a carrier for a dichroic dye (e.g., iodine), allowing dichroic dye molecules with aligned orientations to form molecular chains. Polarized light parallel to these chains is absorbed or reflected, while polarized light perpendicular to the chains can pass through, achieving a polarization effect. The two TAC layers 101 protect the PVA layer from damage by moisture and other external substances, ensuring the polarizer's environmental weather resistance. Furthermore, the PVA layer 103 and the TAC layer 101 are bonded together by a pressure-sensitive adhesive layer 102 with a similar refractive index, preventing brightness loss due to refraction and reflection. However, the design of these conventional polarizers focuses only on achieving polarization performance, neglecting effective control of the light propagation path, resulting in poor light-gathering ability. Further, referring to… Figure 2 A conventional liquid crystal panel 10 includes a first polarizer 11, a first glass substrate 12, a thin-film transistor 13, a liquid crystal layer 14, a light filter 15, a second glass substrate 16, and a second polarizer 17, which are sequentially stacked from the light-incident direction to the light-out direction. Due to the presence of the two polarizers, the liquid crystal panel 10 typically has only 4-6% light transmittance. Therefore, referring to... Figure 3 In display devices, a light-concentrating film 21 is usually required on the light-emitting side of the backlight module 20 to improve brightness. This not only increases the cost, but also occupies a vertical gap of about 0.6mm between the LCD panel 10 and the backlight module 20. The surface hardness of the light-concentrating film 21 is usually 1 to 2HB, while the hardness of the polarizer is usually 8 to 10B. The difference in hardness between the two is huge, which makes the polarizer very easy to be scratched by the light-concentrating film 21 during transportation, resulting in quality accidents.

[0051] In this embodiment, by setting a triangular prism array structure (i.e., a first triangular prism array structure and a second triangular prism array structure) in the polarizer, when light enters the triangular prism array structure, due to the difference in refractive index between different media, the light will be refracted at the interface of the triangular prisms, thereby being guided to a specific direction, making the originally divergent light more concentrated, thus improving the light energy utilization rate and display brightness, and enhancing the overall light-gathering effect of the polarizer. Furthermore, by setting multiple triangular prism array structures, multi-level light control can be achieved, enhancing the light-gathering effect in multiple dimensions, thereby achieving a more uniform and efficient light-gathering effect. With the above-mentioned polarizer setting, the light-gathering film in the backlight module can be omitted, increasing the vertical gap between the liquid crystal panel and the backlight module in the display device by about 0.6mm, thereby reducing the probability of the polarizer being scratched during transportation.

[0052] Based on this, refer to Figure 4The first aspect of this application provides a polarizer 100, which includes a first protective layer 110, a first structure of a triangular prism array 130, a polarizing layer 140, a second structure of a triangular prism array 160, and a second protective layer 170, which are stacked sequentially.

[0053] Optionally, the polarizing layer 140 is the core part of the polarizer 100, responsible for selectively transmitting or blocking light vibration components in a specific direction. By absorbing or reflecting light vibrations in a certain direction, light vibrations perpendicular to that direction are allowed to pass through, thereby generating linearly polarized light.

[0054] Optionally, the polarizing layer 140 may be made of polyvinyl alcohol (PVA), which is a material dyed with a dichroic dye (e.g., iodine).

[0055] Optionally, PVA is dyed and stretched so that the molecular chains are aligned along the stretching direction. This orderly arrangement allows the PVA film to absorb light in one direction and transmit light in the vertical direction, thereby achieving a polarization effect.

[0056] Optionally, the protective layer includes a first protective layer 110 and a second protective layer 170 respectively disposed on both sides of the polarization layer 140, mainly used to protect the polarization layer 140 from external environmental factors, such as moisture, heat, and mechanical damage. In addition, the protective layer can also enhance the overall mechanical strength of the polarizer 100, making it more suitable for installation and use conditions in practical applications.

[0057] Alternatively, the protective layer material may include: cellulose triacetate (TAC), PET (polyethylene terephthalate), or PMMA (polymethyl methacrylate).

[0058] In one feasible embodiment, the apex angles of the first structure 130 of the triangular prism array and the second structure 160 of the triangular prism array both face the light-emitting side of the polarizer 100.

[0059] In one feasible embodiment, the triangular prism array structure includes a first triangular prism array structure 130 and a second triangular prism array structure 160. When light enters the triangular prism array structure, due to the difference in refractive index between different media, the light will be refracted at the interface of the triangular prisms. The apex angles of the first triangular prism array structure 130 and the second triangular prism array structure 160 are both facing the light-emitting side of the polarizer 100. Therefore, the originally divergent light can be guided to the light-emitting side of the polarizer 100, making the originally divergent light more concentrated, thereby improving the light energy utilization rate and display brightness, and enhancing the overall light-gathering effect of the polarizer 100.

[0060] In one feasible embodiment, the refractive index of the first structure 130 of the triangular prism array is greater than the refractive index of the functional layer adjacent to it in the polarizer 100; the refractive index of the second structure 160 of the triangular prism array is greater than the refractive index of the functional layer adjacent to it in the polarizer 100.

[0061] In one feasible embodiment, the refractive index of the first structure 130 of the triangular prism array is greater than the refractive index of the functional layers adjacent to it in the polarizer 100, such as the first protective layer 110, the polarizing layer 140, and / or the first adhesive layer 120; the refractive index of the second structure 160 of the triangular prism array is greater than the refractive index of the functional layers adjacent to it in the polarizer 100, such as the second protective layer 170, the polarizing layer 140, and / or the second adhesive layer 150; by setting the refractive index, the light incident on the polarizer 100 can produce a stronger refractive effect under a higher refractive index difference, causing the light incident on the triangular prism array to be deflected, making it more concentrated or to travel along a specific path (i.e. towards the light-emitting side of the polarizer 100), thereby reducing unnecessary scattering and loss, and improving light energy utilization and display brightness.

[0062] Optionally, a triangular prism basic structure array can be formed on the polarization layer 140 and the second protective layer 170 by a roller hot pressing process, and a light-curing adhesive can be filled into the triangular prism basic structure array. After curing, the first structure 130 and the second structure 160 of the triangular prism array are obtained respectively.

[0063] Optionally, the refractive index of the triangular prism array structure is greater than or equal to 1.7.

[0064] Optionally, the refractive index of the functional layer adjacent to the triangular prism array structure is less than 1.6, for example, around 1.5, and the functional layer includes at least one of the following: a first protective layer 110, a first adhesive layer 120, a polarizing layer 140, a second adhesive layer 150, and a second protective layer 170.

[0065] For example, refer to Figure 5 The triangle represents a triangular prism array structure, and the arrows indicate the direction of light propagation. It is evident that during the process of light energy emanating from a denser medium with a high refractive index to a less dense medium with a low refractive index, the outgoing light direction will be deflected and the outgoing angle will increase, according to the law of refraction. However, in the triangular prism array structure of this embodiment, the light energy is deflected towards the center line of the triangular prism array structure, thereby producing a significant light energy converging effect.

[0066] In one feasible implementation, refer to Figure 6 The direction of the edge of the first structure 130 of the triangular prism array is perpendicular to the direction of the edge of the second structure 160 of the triangular prism array.

[0067] In one feasible embodiment, when the ridge directions of the first prism array structure 130 and the second prism array structure 160 are perpendicular to each other, it means that these two layers of prism array structures can refract or reflect the incident light in two mutually perpendicular directions, so that the light is effectively focused not only in one direction but also in the other, thereby achieving a more uniform and efficient light-gathering effect. However, if both layers of prism array structures are arranged in the same direction, it may lead to inconsistent optical performance in different directions, resulting in distortion of the focused spot shape or uneven energy distribution. The embodiment of this application can make the light field more balanced in all directions, effectively avoiding the above problems. Furthermore, the mutually perpendicular ridge directions can better concentrate the originally divergent light into a specific target area by deflecting or focusing the incident light in two different directions. Compared with single-direction control, this method can achieve "bidirectional focusing," thereby significantly improving the concentration and utilization efficiency of light energy.

[0068] Optionally, setting a single-layer triangular prism array structure in the polarizer 100 can improve the light-gathering effect of the polarizer 100 by about 15%, while setting a two-layer triangular prism array structure with mutually perpendicular prism directions in the polarizer 100 can improve the light-gathering effect of the polarizer 100 by about 30%.

[0069] In one feasible embodiment, the polarizer 100 further includes: a first adhesive layer 120 disposed between the first protective layer 110 and the first structure 130 of the triangular prism array; and a second adhesive layer 150 disposed between the polarizing layer 140 and the second structure 160 of the triangular prism array.

[0070] Optionally, the first adhesive layer 120 and the second adhesive layer 150 can be pressure-sensitive adhesives. Pressure-sensitive adhesives have good adaptability and flexibility and can adapt to various surface characteristics. Whether the surface is smooth or slightly rough, pressure-sensitive adhesives can provide reliable bonding effects and ensure strong adhesion between the film layers.

[0071] In one feasible embodiment, the apex angle of the first structure 130 of the triangular prism array is 88° to 92°. For example, the apex angle of the first structure 130 of the triangular prism array is 88°, 88.5°, 89°, 89.5°, 90°, 90.5°, 91°, 91.5°, 92°, etc.

[0072] In one feasible embodiment, the apex angle of the second structure 160 of the triangular prism array is 88° to 92°. For example, the apex angle of the second structure 160 of the triangular prism array is 88°, 88.5°, 89°, 89.5°, 90°, 90.5°, 91°, 91.5°, 92°, etc.

[0073] Optionally, refer to Figure 4 The vertex angles of the first structure 130 and the second structure 160 of the triangular prism array can be... Figure 4 ∠a in the middle.

[0074] Optionally, if the apex angle is too small, it may cause the light to be concentrated too much in a very narrow area, resulting in a "hot spot" phenomenon, where some areas have excessively high light intensity while other areas have insufficient light. This not only reduces the overall uniformity of illumination but may also lead to localized overheating. Conversely, if the apex angle is too large, it may not be able to effectively concentrate the light, resulting in an overly dispersed light distribution, reducing the desired light-gathering effect and lowering the system's light energy utilization rate. Therefore, in this embodiment, the apex angles of the first structure 130 of the triangular prism array and the second structure 160 of the triangular prism array are determined to be 88° to 92°.

[0075] In one feasible embodiment, the spacing between adjacent triangular prisms in the first structure 130 of the triangular prism array is 50 to 70 μm; for example, the spacing between adjacent triangular prisms in the first structure 130 of the triangular prism array is 50 μm, 52 μm, 54 μm, 56 μm, 58 μm, 60 μm, 62 μm, 64 μm, 66 μm, 68 μm, 70 μm, etc.

[0076] In one feasible embodiment, the spacing between adjacent triangular prisms in the second structure 160 of the triangular prism array is 50 to 70 μm; for example, the spacing between adjacent triangular prisms in the second structure 160 of the triangular prism array is 50 μm, 52 μm, 54 μm, 56 μm, 58 μm, 60 μm, 62 μm, 64 μm, 66 μm, 68 μm, 70 μm, etc.

[0077] Optionally, refer to Figure 4 The spacing between adjacent triangular prisms in the first structure 130 of the triangular prism array and the spacing between adjacent triangular prisms in the second structure 160 of the triangular prism array can be... Figure 4 L in the middle.

[0078] Optionally, when the spacing between adjacent triangular prisms in the triangular prism array structure is too small, mutual interference may occur between adjacent prisms, leading to an unnecessary increase in scattering loss and a corresponding increase in manufacturing difficulty. On the other hand, if the spacing between adjacent triangular prisms is too large, the effective range of each prism is limited, making it difficult to achieve effective light control and resulting in insufficient light guidance, thereby affecting the overall light-gathering efficiency and uniformity. Therefore, in this embodiment, the spacing between adjacent triangular prisms in the first structure 130 of the triangular prism array and the spacing between adjacent triangular prisms in the second structure 160 of the triangular prism array are both determined to be 50–70 μm.

[0079] In this embodiment, by setting a triangular prism array structure (i.e., the first triangular prism array structure 130 and the second triangular prism array structure 160) in the polarizer 100, when light enters the triangular prism array structure, due to the difference in refractive index between different media, the light will be refracted at the interface of the triangular prisms, thereby being guided to a specific direction, making the originally divergent light more concentrated, thereby improving the light energy utilization rate and display brightness, and enhancing the overall light-gathering effect of the polarizer 100. Furthermore, by setting multiple triangular prism array structures, multi-level light control can be achieved, enhancing the light-gathering effect in multiple dimensions, thereby achieving a more uniform and efficient light-gathering effect. With the above-mentioned setting of the polarizer 100, the light-gathering film in the backlight module can be omitted, increasing the vertical gap between the liquid crystal panel and the backlight module in the display device by about 0.6mm, thereby reducing the probability of scratches on the polarizer 100 during transportation.

[0080] A second aspect of this application provides a liquid crystal panel, which includes the polarizer 100 as described above.

[0081] Optionally, refer to Figure 4 The polarizer 100 includes a first protective layer 110, a first structure of triangular prism array 130, a polarizing layer 140, a second structure of triangular prism array 160, and a second protective layer 170, which are stacked sequentially.

[0082] Optionally, the ridge direction of the first structure 130 of the triangular prism array is perpendicular to the ridge direction of the second structure 160 of the triangular prism array.

[0083] Optionally, the refractive index of the first structure 130 of the triangular prism array is greater than the refractive index of the functional layer adjacent to it in the polarizer 100;

[0084] The refractive index of the second structure 160 of the triangular prism array is greater than the refractive index of the functional layer adjacent to it in the polarizer 100.

[0085] Optionally, the apex angles of the first structure 130 and the second structure 160 of the triangular prism array both face the light-emitting side of the polarizer 100.

[0086] Optionally, the polarizer 100 further includes:

[0087] The first adhesive layer 120 is disposed between the first protective layer 110 and the first structure 130 of the triangular prism array;

[0088] The second adhesive layer 150 is disposed between the polarizing layer 140 and the second structure 160 of the triangular prism array.

[0089] Optionally, the apex angle of the first structure 130 of the triangular prism array is 88° to 92°.

[0090] Optionally, the apex angle of the second structure 160 of the triangular prism array is 88° to 92°.

[0091] Optionally, the spacing between adjacent triangular prisms in the first structure 130 of the triangular prism array is 50–70 μm.

[0092] Optionally, the spacing between adjacent triangular prisms in the second structure 160 of the triangular prism array is 50–70 μm.

[0093] Optionally, the polarizer 100 further includes an adhesive layer, which is disposed between the first protective layer 110 and the first structure 130 of the triangular prism array, and between the polarizing layer 140 and the second structure 160 of the triangular prism array.

[0094] Optionally, refer to Figure 2 The liquid crystal panel 10 includes a first polarizer 11, a first glass substrate 12, a thin film transistor 13, a liquid crystal layer 14, a light filter 15, a second glass substrate 16, and a second polarizer 17, which are sequentially stacked from the light incident direction to the light emitting direction. The first polarizer 11 and / or the second polarizer 17 can be the polarizer 100 in the embodiments of this application, thereby effectively improving the light focusing effect of the liquid crystal panel.

[0095] A third aspect of this application provides a display device, which includes: a polarizer 100 as described above, or a liquid crystal panel as described above.

[0096] Optionally, refer to Figure 4 The polarizer 100 includes a first protective layer 110, a first structure of triangular prism array 130, a polarizing layer 140, a second structure of triangular prism array 160, and a second protective layer 170, which are stacked sequentially.

[0097] Optionally, the ridge direction of the first structure 130 of the triangular prism array is perpendicular to the ridge direction of the second structure 160 of the triangular prism array.

[0098] Optionally, the refractive index of the first structure 130 of the triangular prism array is greater than the refractive index of the functional layer adjacent to it in the polarizer 100;

[0099] The refractive index of the second structure 160 of the triangular prism array is greater than the refractive index of the functional layer adjacent to it in the polarizer 100.

[0100] Optionally, the apex angles of the first structure 130 and the second structure 160 of the triangular prism array both face the light-emitting side of the polarizer 100.

[0101] Optionally, the polarizer 100 further includes:

[0102] The first adhesive layer 120 is disposed between the first protective layer 110 and the first structure 130 of the triangular prism array;

[0103] The second adhesive layer 150 is disposed between the polarizing layer 140 and the second structure 160 of the triangular prism array.

[0104] Optionally, the apex angle of the first structure 130 of the triangular prism array is 88° to 92°.

[0105] Optionally, the apex angle of the second structure 160 of the triangular prism array is 88° to 92°.

[0106] Optionally, the spacing between adjacent triangular prisms in the first structure 130 of the triangular prism array is 50–70 μm.

[0107] Optionally, the spacing between adjacent triangular prisms in the second structure 160 of the triangular prism array is 50–70 μm.

[0108] Optionally, the polarizer 100 further includes an adhesive layer, which is disposed between the first protective layer 110 and the first structure 130 of the triangular prism array, and between the polarizing layer 140 and the second structure 160 of the triangular prism array.

[0109] In one feasible embodiment, the display device includes: a backlight module 20; the diffuser 22 of the backlight module 20 is adjacent to the polarizer 100.

[0110] Optionally, since the polarizer 100 provided in this embodiment has a good light-gathering effect, the light-gathering film in the backlight module 20 of the display device can be omitted, so that the diffuser plate 22 of the backlight module 20 is adjacent to the lower polarizer in the liquid crystal panel; and since the light-gathering film is omitted, the vertical gap between the liquid crystal panel and the backlight module 20 in the display device is increased by about 0.6 mm, thereby reducing the probability of the polarizer 100 being scratched during transportation.

[0111] Optionally, refer to Figure 7 The display device includes a liquid crystal panel backlight module 20; the polarizer 100 adjacent to the diffuser plate 22 of the backlight module 20 in the liquid crystal panel is the polarizer 100 described in the above embodiments of this application. Since the polarizer 100 has a better light-gathering effect, the light-gathering film in the backlight module 20 of the display device can be omitted, so that the diffuser plate 22 of the backlight module 20 is adjacent to the lower polarizer 100 in the liquid crystal panel; and since the light-gathering film is omitted, the vertical gap between the liquid crystal panel and the backlight module 20 in the display device is increased by about 0.6 mm, thereby reducing the probability of scratching the polarizer 100 during transportation. At the same time, by omitting the light-gathering film, the production cost of the display device is also effectively reduced.

[0112] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the patent protection scope of this application.

Claims

1. A polarizer, characterized in that, The polarizer comprises a first protective layer, a first structure of a triangular prism array, a polarizing layer, a second structure of a triangular prism array, and a second protective layer, which are stacked sequentially.

2. The polarizer as described in claim 1, characterized in that, The ridge direction of the first structure of the triangular prism array is perpendicular to the ridge direction of the second structure of the triangular prism array.

3. The polarizer as described in claim 1, characterized in that, The refractive index of the first structure of the triangular prism array is greater than the refractive index of the functional layer adjacent to it in the polarizer; The refractive index of the second structure of the triangular prism array is greater than the refractive index of the functional layer adjacent to it in the polarizer.

4. The polarizer as described in claim 1, characterized in that, The apex angles of both the first and second triangular prism array structures face the light-emitting side of the polarizer.

5. The polarizer as described in claim 1, characterized in that, The polarizer further includes: A first adhesive layer is disposed between the first protective layer and the first structure of the triangular prism array; A second adhesive layer is disposed between the polarizing layer and the second structure of the triangular prism array.

6. The polarizer as described in claim 1, characterized in that, The vertex angle of the first structure of the triangular prism array is 88° to 92°; And / or, the apex angle of the second structure of the triangular prism array is 88° to 92°.

7. The polarizer as described in claim 1, characterized in that, The spacing between adjacent triangular prisms in the first structure of the triangular prism array is 50-70 μm. And / or, the spacing between adjacent triangular prisms in the second structure of the triangular prism array is 50-70 μm.

8. A liquid crystal panel, characterized in that, The liquid crystal panel includes a polarizer as described in any one of claims 1 to 7.

9. A display device, characterized in that, The display device includes a polarizer as described in any one of claims 1 to 7.

10. The display device as claimed in claim 9, characterized in that, The display device includes: a backlight module; The diffuser plate of the backlight module is adjacent to the polarizer.

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