Electric control visual angle switching panel and display device

Abstract

The invention provides an electric control visual angle switching panel and a display device. The electric control view angle switching panel comprises a view angle adjusting element, a first polaroid, a second polaroid and a supporting structure body. The viewing angle adjusting element comprises at least one plastic substrate. The visual angle adjusting element is located between the first polaroid and the second polaroid. The support structure is in contact with at least a portion of the second polarizer. The electronic control visual angle switching panel provided by the invention has good reliability. The display device comprises a light source module, a display panel and an electric control visual angle switching panel. The display device provided by the invention has good reliability and can reduce the risk of occurrence of a reliability problem.

Description

Technical Field

[0001] The present invention relates to an electronic component and an electronic device, and particularly to an electrically controlled viewing angle switching panel and a display device. Background Art

[0002] With the continuous progress of display technology, all devices are developing towards the trends of small size, thin thickness, and light weight. Therefore, the mainstream display devices on the market have now developed from the previous cathode ray tubes to liquid crystal display devices. In some cases, to prevent confidential information from being peeked by others, a light control film (LCF) is generally placed in front of the display device to filter out light at large angles, so as to achieve the effect of anti-peeking. And when the anti-peeking effect is not required, the light control film can be manually removed to switch the viewing angle to a large angle for everyone to view. Currently, another technology is to use an electrically controlled viewing angle switching panel, which does not require manual placement and removal of the viewing angle switching device, and has convenience.

[0003] Generally speaking, a display device using an electrically controlled viewing angle switching panel is composed of three major components: a display panel, an electrically controlled viewing angle switching panel, and a backlight module. The backlight module can make the light evenly distributed at the front viewing angle, so that the image of the display panel can be clearly presented. Through the switching of the electrically controlled viewing angle switching panel, by controlling whether the light in the anti-peeking viewing angle direction is absorbed by the electrically controlled viewing angle switching panel, the functions of picture anti-peeking and sharing can be further achieved.

[0004] However, most of the current electrically controlled viewing angle switching panels use glass substrates, making the thickness and weight of the display device with an electrically controlled viewing angle switching panel larger than that of general display devices. To meet the design trend of being thin and light, the substrate must use materials with thinner thickness and lighter weight. Although plastic materials meet the requirements of the above-mentioned thin and light design trends, their mechanical strength is inferior to that of glass. When polarizers are attached to the upper and lower surfaces of the substrate made of plastic material for the electrically controlled viewing angle switching panel, some reliability abnormal problems may occur in the electrically controlled viewing angle switching panel under the reliability condition tests such as high temperature and high humidity or thermal shock.

[0005] The "Background Art" paragraph is only used to help understand the content of the present invention. Therefore, the content disclosed in the "Background Art" paragraph may include some known technologies that are not known to those skilled in the art of the relevant technical field. The content disclosed in the "Background Art" paragraph does not represent the problems to be solved by this content or one or more embodiments of the present invention, which have been known or recognized by those skilled in the art of the relevant technical field before the filing of the present invention application. Summary of the Invention

[0006] The present invention provides an electrically controlled viewing angle switching panel with good reliability.

[0007] The present invention provides a display device, which has good reliability and can reduce the risk of occurrence of reliability problems.

[0008] To achieve one or some or all of the above purposes or other purposes, an embodiment of the present invention provides an electrically controlled viewing angle switching panel. The electrically controlled viewing angle switching panel includes a viewing angle adjustment element, a first polarizer, a second polarizer, and a support structure. The viewing angle adjustment element includes at least one plastic substrate. The viewing angle adjustment element is located between the first polarizer and the second polarizer. The support structure is in contact with at least a part of the second polarizer.

[0009] To achieve one or some or all of the above purposes or other purposes, an embodiment of the present invention provides a display device. The display device includes a light source module, a display panel, and an electrically controlled viewing angle switching panel.

[0010] Based on the above, in the electrically controlled viewing angle switching panel and the display device of an embodiment of the present invention, through the setting of the support structure, it is possible to effectively suppress the shrinkage of the polarizer under reliability condition tests such as high temperature and high humidity or thermal shock, thereby avoiding deformation of the electrically controlled viewing angle switching panel, maintaining the flatness of the original components and the integrity of the structure, and thus ensuring the reliability of the electrically controlled viewing angle switching panel and the display device to reduce the risk of occurrence of reliability problems.

[0011] To make the above features and advantages of the present invention more obvious and understandable, the following specific embodiments are given and described in detail in conjunction with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a block diagram of a display device according to an embodiment of the present invention.

[0013] Figure 2A is Figure 1 a structural diagram of a display device.

[0014] Figure 2B is Figure 2A an optical path diagram of the light source module of

[0015] Figure 2C is Figure 2A a structural diagram of a viewing angle adjustment element.

[0016] Figure 3A is a structural diagram of a display device according to another embodiment of the present invention.

[0017] Figure 3B is Figure 3A an enlarged diagram of a partial area of

[0018] Figure 4 is a structural diagram of a display device according to another embodiment of the present invention.

[0019] Figures 5A to 5D Is Figure 1 A schematic structural diagram of various light source modules.

[0020] Description of the reference numerals in the drawings:

[0021] 100, 300, 400: Electrically controlled viewing angle switching panel

[0022] 110: Viewing angle adjustment element

[0023] 111: Liquid crystal layer

[0024] 112, 113: Plastic substrates

[0025] 114: Driving circuit

[0026] 115: Electrode layer

[0027] 116: Alignment layer

[0028] 120: First polarizer

[0029] 130, 430: Second polarizer

[0030] 140, 340: Support structure

[0031] 200, 200A, 200B: Display device

[0032] 210, 210A, 210B, 210C, 210D: Light source module

[0033] 211: Light emitting element

[0034] 212: Light guide plate

[0035] 213: Reflective element

[0036] 214, 214A, 214B, 214C, 214D: Optical film

[0037] 220: Display panel

[0038] D1, D2: Alignment directions

[0039] DF1: First diffuser

[0040] DF2: Second diffuser

[0041] IS: Incident light surface

[0042] L: Light beam

[0043] LC: Liquid crystal molecules

[0044] LF: Light control film

[0045] OA: Optical Colloid

[0046] OF: Optical Film

[0047] OS: Light Exit Surface

[0048] PM: Prismatic Lens

[0049] PM1: First Prismatic Lens

[0050] PM2: Second Prismatic Lens

[0051] RPM: Reverse Prismatic Lens

[0052] SA: Support Colloid. Detailed Implementation Manner

[0053] The foregoing and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or rear, etc., are only with reference to the directions of the accompanying drawings. Therefore, the directional terms used are for illustration and not for limiting the present invention.

[0054] Figure 1 is a block diagram of a display device according to an embodiment of the present invention. Please refer to Figure 1 , in this embodiment, the display device 200 includes a light source module 210, a display panel 220, and an electronically controlled viewing angle switching panel 100. In this embodiment, the electronically controlled viewing angle switching panel 100 is, for example, disposed between the display panel 220 and the light source module 210. In this embodiment, the display panel 220 is, for example, a liquid crystal display panel (Liquid Crystal Display Panel), a transmissive display panel, or a transflective display panel, but the present invention is not limited thereto.

[0055] The following will be combined with Figures 2A to 2C to further describe various components in the display device 200.

[0056] Figure 2A is Figure 1 a structural diagram of a display device 200. Figure 2B is Figure 2A an optical path diagram of the light source module 210. Figure 2C is Figure 2A a structural diagram of a viewing angle adjustment element 110. Please refer to Figure 2A and Figure 2B, in this embodiment, the light source module 210 is used to provide a light beam L for illuminating the display panel 220, and includes a light emitting element 211, a light guide plate 212, a reflection element 213, and at least one optical film 214. The light emitting element 211 is, for example, a strip-shaped light source including a plurality of point light sources, where the point light source is, for example, a light emitting diode (LED), but is not limited thereto. The light emitting element 211 can also be other types of strip-shaped light sources, such as a fluorescent tube. The present invention does not limit the type of light source.

[0057] The light emitting element 211 provides the light beam L. The light guide plate 212 is located on the transmission path of the light beam L. The reflection element 213 and at least one optical film 214 are located on the transmission path of the light beam L, and at least one optical film 214 is located between the light guide plate 212 and the electrically controlled viewing angle switching panel 100.

[0058] Specifically, in this embodiment, the light emitting element 211 is used to provide the light beam L. The light guide plate 212, the reflection element 213, and at least one optical film 214 are all located on the transmission path of the light beam L and have an incident light surface IS and an exit light surface OS. The light beam L enters the light guide plate 212 from the incident light surface IS. The reflection element 213 is disposed below the light guide plate 212 to reflect the light beam L emitted from below the light guide plate 212 back into the light guide plate 212 to improve the light utilization efficiency.

[0059] And, in this embodiment, as Figure 2A and Figure 2B shown, at least one optical film 214 is located between the light guide plate 212 and the electrically controlled viewing angle switching panel 100. For example, in this embodiment, at least one optical film 214 is a prism sheet PM, which can be used to adjust the forward viewing angle of the light beam L after it exits from the exit light surface, but the present invention is not limited thereto. In other embodiments, the light source module 210 may include other optical film sheets, which are disposed on the light guide plate 212. The optical film sheet is, for example, a diffusion sheet, a prism sheet, a louver film, or a combination of the above elements, but is not limited thereto. In addition, as Figure 2A and Figure 2B shown, in this embodiment, the display panel 220, the electrically controlled viewing angle switching panel 100, and the exit light surface OS of the light guide plate 212 are overlapped and arranged, where Figure 2A the light source module 210 shown in Figure 2B is a schematic structural view observed from the side of the light guide plate 212 that is not adjacent to the light emitting element 211, Figure 2B then shows a schematic optical path view observed from the side of the light guide plate 212 adjacent to the light emitting element 211. As

[0060] shown, after the light beam L exits from the exit light surface OS, it passes through at least one optical film 214 and is transmitted to the electrically controlled viewing angle switching panel 100 and the display panel 220.

[0060] On the other hand, asFigure 2A As shown, in this embodiment, the electronically controlled viewing angle switching panel 100 includes a viewing angle adjustment element 110, a first polarizer 120, a second polarizer 130, and a support structure 140. The viewing angle adjustment element 110 is located between the first polarizer 120 and the second polarizer 130. And, as Figure 2A shown, in this embodiment, the electronically controlled viewing angle switching panel 100 is attached to the display panel 220 through an optical adhesive OA, and the optical adhesive OA is located between the first polarizer 120 and the display panel 220. The first polarizer 120 can also serve as the lower polarizer of the display panel 220. On the other hand, a third polarizer is disposed on the side of the display panel 220 away from the viewing angle adjustment element 110 and can be used as the upper polarizer of the display panel 220.

[0061] Furthermore, as Figure 2C shown, in this embodiment, the viewing angle adjustment element 110 includes a liquid crystal layer 111, at least two plastic substrates 112, 113, a driving circuit 114, and two electrode layers 115. The liquid crystal layer 111 and the two electrode layers 115 are disposed between the plastic substrate 112 and the plastic substrate 113. The liquid crystal layer 111 has a plurality of liquid crystal molecules LC and is disposed between the two electrode layers 115. The driving circuit 114 is connected to the two electrode layers 115 to supply voltage to the two electrode layers 115. In addition, the viewing angle adjustment element 110 further includes at least one alignment layer 116. The at least one alignment layer 116 is, for example, two and is respectively disposed between the liquid crystal layer 111 and the two electrode layers 115. One of the alignment layers 116 has an alignment direction D1, and the other alignment layer 116 has an alignment direction D2. The alignment direction D1 and the alignment direction D2 are, for example, anti-parallel. The two alignment layers 116 are used to align the liquid crystal molecules LC, and the absorption axis of the second polarizer 130 is substantially perpendicular to the alignment direction D1. In this embodiment, the electrode layer 115 can be made of a transparent conductive electrode material (such as ITO, IZO, or ITZO). The two alignment layers can be made of polyimide (PI), for example, and can be aligned through a rubbing alignment or photo-alignment process. The liquid crystal layer 111 is, for example, a twisted nematic (TN) or in-plane switching (IPS) type liquid crystal.

[0062] Furthermore, when the driving circuit 114 is not powered on, no potential difference is generated between the two electrode layers 115, and multiple liquid crystal molecules LC are arranged along the alignment directions of the two alignment layers without the driving of an external electric field. The light beam L (polarized light) at various angles passing through the second polarizer 130 does not change its polarization direction after passing through the viewing angle adjustment element 110, so it does not affect the viewing angle. When the driving circuit 114 is powered on, a potential difference is generated between the two electrode layers 115, and the formed electric field can drive multiple liquid crystal molecules LC of the liquid crystal layer 111 to rotate (not shown in the figure). For example, the long axes of most liquid crystal molecules LC are turned perpendicular to the plastic substrate 112. Thus, in the direction perpendicular to the alignment direction D1 (i.e., the viewing angle control direction), the light beam L incident on the viewing angle adjustment element 110 at a large angle will be converted into different polarization directions after passing through the liquid crystal layer 111, while the light beam L incident on the viewing angle adjustment element 110 at a small angle will not change its polarization direction after passing through the liquid crystal layer 111. Finally, when the light beam L is incident on the first polarizer 120, the light beam L incident on the display panel 220 at a small angle can pass through the first polarizer 120 smoothly, while the light beam L incident on the display panel 220 at a large angle will be absorbed by the first polarizer 120 (the absorption axis of the first polarizer 120 is parallel to the absorption axis of the second polarizer 130 for example), thus achieving the effect of controlling the light viewing angle.

[0063] Moreover, in this embodiment, the support structure 140 is at least in contact with a part of the second polarizer 130, and can be used to reinforce the structure of the second polarizer 130 or transfer stress, thereby suppressing its shrinkage deformation. As Figure 2A shown, in this embodiment, the support structure 140 is an optical film OF, wherein the second polarizer 130 is located between the viewing angle adjustment element 110 and the optical film OF, and the optical film OF is attached to the second polarizer 130.

[0064] In this embodiment, the thickness of the optical film OF is, for example, between 110 micrometers and 310 micrometers, and the material of the optical film OF can be polyethylene terephthalate (PET). Polyethylene terephthalate (PET) has high strength and excellent mechanical properties, such as high rigidity and hardness, extremely low water absorption rate, good chemical resistance, especially acid resistance, and has better transparency and gloss.

[0065] Thus, through the mechanical properties of the optical film OF, the strength of the second polarizer 130 can be reinforced to effectively inhibit the shrinkage of the second polarizer 130 under reliability condition tests such as high temperature and high humidity or thermal shock, thereby avoiding deformation of the electrically controlled viewing angle switching panel 100, maintaining the flatness of the original components and the integrity of the structure, and thus ensuring the reliability of the electrically controlled viewing angle switching panel 100 and the display device 200, reducing the risk of reliability problems, and ensuring that the picture quality of the display device 200 is not affected by the reliability condition tests.

[0066] For example, in this embodiment, the optical film OF serving as the support structure 140 can be a light control film (Louver film) or a light turning film (Turing film), and can be used simultaneously to change the light shape of the light source module 210 to brighten, improve the picture uniformity, or change the viewing angle of the light beam L provided by the light source module 210, but the present invention is not limited thereto. As long as the optical film OF has the mechanical property that in an environment of high temperature and high humidity (70 °C / 90%, 1000 Hr), the film surface does not deform or wrinkle, so that after the display device 200 passes the reliability test of the final product, the picture quality of the display device 200 is not affected by the reliability condition tests, it can be used as the optical film OF of the present invention.

[0067] In addition, in the foregoing embodiments, although the optical film OF with good mechanical properties is exemplified as the support structure 140, the present invention is not limited thereto. In other embodiments, the support structure 140 can also be other structures for reinforcing the structure or transmitting stress, which can inhibit the shrinkage and deformation of the polarizer, and thus the electrically controlled viewing angle switching panel 100 and the display device 200 can achieve the foregoing effects and advantages. The following will be further described in conjunction with Figures 3A to 4 for further illustration.

[0068] Figure 3A is a schematic structural diagram of a display device according to another embodiment of the present invention. Figure 3B is Figure 3A an enlarged schematic diagram of a partial area of Figure 3A and Figure 3B Please refer to Figure 2A and Figure 3A and Figure 3BAs shown, in this embodiment, the support structure 340 of the electrically controlled viewing angle switching panel 300 is a support colloid SA, which at least covers the side surfaces of the viewing angle adjustment element 110, the first polarizer 120, and the second polarizer 130, and a part of the surface of the display panel 220 adjacent to the electrically controlled viewing angle switching panel 300 and not covered by the electrically controlled viewing angle switching panel 300.

[0069] Moreover, in this embodiment, the thickness of the display panel 220 is at least 0.05 mm or more and has rigidity. Thus, by connecting the display panel 220 with the support colloid SA and covering the electrically controlled viewing angle switching panel 300, the electrically controlled viewing angle switching panel 300 can reinforce its own structure through the support colloid SA and transfer stress to the display panel 220, and the stiffness of the electrically controlled viewing angle switching panel 300 can be further strengthened by the rigidity of the display panel 220 to avoid deformation.

[0070] Thus, through the arrangement of the support colloid SA, the strength of the first polarizer 120 and the second polarizer 130 of the electrically controlled viewing angle switching panel 300 can be reinforced, effectively suppressing the shrinkage of the first polarizer 120 and the second polarizer 130 under reliability condition tests such as high temperature and high humidity or thermal shock, thereby avoiding deformation of the electrically controlled viewing angle switching panel 300, ensuring the reliability of the electrically controlled viewing angle switching panel 300 and the display device 200A, reducing the risk of reliability problems, and ensuring that the image quality of the display device 200A is not affected by the reliability condition tests.

[0071] In this embodiment, the material of the support colloid SA is, for example, silicone rubber, whose main component is silicon, belonging to room temperature vulcanization compound (RTV), and is suitable for an environment with an operating temperature of -50°C to 200A°C. Silicone rubber has good adhesiveness, its colloid is non-toxic, pollution-free, non-corrosive, and has good electrical insulation and arc resistance, as well as properties such as aging resistance, moisture-proof and shock-proof, and can be used for structural protection or reinforcement, but the present invention is not limited thereto. In other embodiments, as long as the material can be used for structural reinforcement and its weather resistance can meet the requirements of reliability tests, it can be used as the material of the support colloid SA.

[0072] Figure 4 is a schematic structural diagram of a display device according to another embodiment of the present invention. Please refer to Figure 4 In this embodiment, the electrically controlled viewing angle switching panel 400 and the display device 200B are the same as Figure 2AThe electronic control viewing angle switching panel 100 is similar to the display device 200, and the differences between the two are as described below. In this embodiment, the second polarizer 430 is a coating type polarizer. The coating type polarizer is composed of liquid crystal material and dye, does not contain polyvinyl alcohol (PVA), and does not require a stretching process. Therefore, it has low internal stress and the characteristic of not being easily shrunk and deformed in a high temperature and high humidity environment.

[0073] More specifically, in this embodiment, the materials of the coating type polarizer, that is, the liquid crystal material and the dye, can be directly coated on the plastic substrate of the electronic control viewing angle switching panel 400 facing the light source module 210, and then the surface hardening treatment technology (Hard Coating) is used to protect the coating type polarizer materials. In this way, the thinning of the overall structure can be further achieved.

[0074] Alternatively, in this embodiment, the second polarizer 430 may include a low birefringence substrate or a substrate made of polyethylene terephthalate, and the materials of the coating type polarizer, that is, the liquid crystal material and the dye, can be coated on the low birefringence substrate or the substrate, and a coating type polarizer can be formed on the low birefringence substrate or the substrate. In this embodiment, when the material of the substrate is polyethylene terephthalate, the optical axis direction of the substrate should be perpendicular or horizontal to the absorption axis direction of the coating type polarizer, or limited within the range of ±30 degrees with respect to the absorption axis direction of the coating type polarizer.

[0075] In this way, the low birefringence substrate or the substrate can serve as a protective layer and a support for the coating type polarizer, and the coating type polarizer formed thereon can be adhered to the plastic substrate of the electronic control viewing angle switching panel 400 facing the light source module 210 through an optical adhesive OA to form the second polarizer 430.

[0076] In this way, through the configuration of the coating type polarizer, the second polarizer 430 is not easily shrunk and deformed under the reliability condition tests such as high temperature and high humidity or thermal shock, thereby avoiding deformation of the electronic control viewing angle switching panel 400, ensuring the reliability of the electronic control viewing angle switching panel 400 and the display device 200B, reducing the risk of occurrence of reliability problems, and ensuring that the image quality of the display device 200B is not affected by the reliability condition tests. In addition, when the second polarizer 430 includes a low birefringence substrate or a substrate, the low birefringence substrate or the substrate can also serve as a protective layer and a support for the coating type polarizer, and the electronic control viewing angle switching panel 400 and the display device 200B can also achieve the above-mentioned effects and advantages.

[0077] In addition, in the foregoing embodiments, although at least one optical film 214 is exemplified by a prism sheet PM, the present invention is not limited thereto. In other embodiments, at least one optical film 214 may also be a diffusion sheet, a prism sheet, a light control film, or a combination of the above elements, and the display device 200 can also achieve the foregoing functions, and can achieve the foregoing effects and advantages. The following will be described in conjunction with Figure 5A and Figure 5D for further illustration.

[0078] Figures 5A to 5D is Figure 1 a schematic structural diagram of various light source modules. Please refer to Figures 5A to 5D , Figures 5A to 5D the light source modules 210A, 210B, 210C, 210D of the embodiments of Figure 2A and the light source module 210 of

[0079] In Figure 5A the embodiments of

[0080] In Figure 5B the embodiments of

[0081] In Figure 5C the embodiments of

[0082] In Figure 5DIn an embodiment, at least one optical film 214D of the light source module 210D includes a first diffusion sheet DF1, a second diffusion sheet DF2, a first prism sheet PM1, a second prism sheet PM2, an inverse prism sheet RPM, and a light control thin film LF. The first diffusion sheet DF1, the second diffusion sheet DF2, the first prism sheet PM1, the second prism sheet PM2, and the inverse prism sheet RPM are located between the light guide plate 212 and the light control thin film LF. The first prism sheet PM1 and the second prism sheet PM2 are located between the first diffusion sheet DF1 and the second diffusion sheet DF2, and the inverse prism sheet RPM is located between the first diffusion sheet DF1 and the first prism sheet PM1.

[0083] In the above embodiments, since the light source modules 210A, 210B, 210C, and 210D can all provide a light beam L to illuminate the display panel 220, they can also be applied to Figures 2A to 4 the display devices 200, 200A, and 200B to replace the light source module 210. When the light source modules 210A, 210B, 210C, and 210D are applied to Figures 2A to 4 the display devices 200, 200A, and 200B, the display devices 200, 200A, and 200B can also achieve the aforementioned functions, and can achieve the aforementioned effects and advantages, which will not be elaborated here.

[0084] In summary, in the electro - controlled viewing - angle switching panel and the display device according to an embodiment of the present invention, through the setting of the support structure, the shrinkage of the polarizer can be effectively suppressed under reliability condition tests such as high temperature and high humidity or thermal shock, thereby avoiding deformation of the electro - controlled viewing - angle switching panel, maintaining the flatness of the original components and the integrity of the structure, and thus ensuring the reliability of the electro - controlled viewing - angle switching panel and the display device, and reducing the risk of reliability problems.

[0085] However, the above - mentioned are only the preferred embodiments of the present invention, and the scope of the present invention cannot be limited thereby. That is, all simple equivalent changes and modifications made according to the claims of the present invention and the content of the invention still fall within the scope covered by the present invention patent. In addition, any embodiment or claim of the present invention does not have to achieve all the purposes, advantages, or features disclosed in the present invention. In addition, the abstract and the title (invention name) are only used to assist in the retrieval of patent documents and do not limit the scope of the rights of the present invention. In addition, the terms "first", "second", etc. mentioned in this specification or claims are only used to name the elements or distinguish different embodiments or scopes, and do not limit the upper or lower limits of the number of elements.

Claims

1. An electronically controlled viewing angle switching panel, characterized in that, The electrically controlled viewing angle switching panel includes a viewing angle adjustment element, a first polarizer, a second polarizer, and a support structure, where: The viewing angle adjustment element includes at least one plastic substrate; The viewing angle adjustment element is located between the first polarizer and the second polarizer; and The support structure is in contact with at least a part of the second polarizer.

2. The electronic control viewing angle switching panel according to claim 1, wherein The support structure is an optical film, where the second polarizer is located between the viewing angle adjustment element and the optical film, and the optical film is attached to the second polarizer.

3. The electronically controlled viewing angle switching panel according to claim 2, characterized in that, The thickness of the optical film is between 110 microns and 310 microns.

4. The electronically controlled viewing angle switching panel according to claim 2, characterized in that, The material of the optical film is polyethylene terephthalate.

5. The electronically controlled viewing angle switching panel according to claim 1, wherein The support structure is a support colloid that covers at least the sides of the viewing angle adjustment element, the first polarizer, and the second polarizer.

6. The electronic control perspective switching panel according to claim 5, characterized in that The material of the support colloid is silicone rubber.

7. The electrically controlled viewing angle switching panel according to claim 1, wherein The second polarizer is a coated polarizer.

8. The electronically controlled viewing angle switching panel according to claim 7, characterized in that, The second polarizer further includes a low birefringence substrate, and the material of the coated polarizer is coated on the low birefringence substrate.

9. The electronically controlled viewing angle switching panel according to claim 7, wherein, The second polarizer includes a substrate, the material of the substrate is polyethylene terephthalate, and the material of the coated polarizer is coated on the substrate.

10. A display device, characterized in that, The display device includes a light source module, a display panel, and an electrically controlled viewing angle switching panel, where: The electrically controlled viewing angle switching panel is located between the light source module and the display panel, and includes a viewing angle adjustment element, a first polarizer, a second polarizer, and a support structure, where: The viewing angle adjustment element includes at least one plastic substrate; The viewing angle adjustment element is located between the first polarizer and the second polarizer; and The support structure is in contact with the second polarizer.

11. The display device according to claim 10, characterized in that, The support structure is an optical film, where the second polarizer is located between the viewing angle adjustment element and the optical film, and the optical film is attached to the second polarizer.

12. The display device according to claim 11, wherein The thickness of the optical film is between 110 microns and 310 microns.

13. The display device according to claim 11, characterized in that, The material of the optical film is polyethylene terephthalate.

14. The display device according to claim 10, wherein The support structure is a support colloid that covers at least the sides of the viewing angle adjustment element, the first polarizer, and the second polarizer, and a part of the surface of the display panel adjacent to the electrically controlled viewing angle switching panel and not covered by the electrically controlled viewing angle switching panel.

15. The display device according to claim 14, wherein The material of the support colloid is silicone rubber.

16. The display device according to claim 10, wherein The second polarizer is a coated polarizer.

17. The display device according to claim 16, wherein The second polarizer further includes a low birefringence substrate, and the material of the coated polarizer is coated on the low birefringence substrate.

18. The display device according to claim 16, wherein The second polarizer includes a substrate, the material of the substrate is polyethylene terephthalate, and the material of the coated polarizer is coated on the substrate.

19. The display device according to claim 10, wherein The electrically controlled viewing angle switching panel is attached to the display panel through an optical adhesive, and the optical colloid is located between the first polarizer and the display panel.

20. The display device according to claim 10, wherein The light source module includes a light emitting element, a light guide plate, and a reflection element, where: The light emitting element provides a light beam; The light guide plate is located on the transmission path of the light beam; and The reflection element is located on the transmission path of the light beam.

21. The display device according to claim 20, characterized in that, The light source module further includes at least one optical film, wherein: The at least one optical film is located on the transmission path of the light beam and between the light guide plate and the electrically controlled viewing angle switching panel.

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