Privacy structure, manufacturing method thereof and liquid crystal display device

Abstract

The application provides a privacy structure and a manufacturing method thereof and a liquid crystal display device, comprising: a first light refraction structure layer and a second light refraction structure layer stacked from bottom to top; the first light refraction structure layer comprises a first transparent substrate, a first insulating layer and a prismatic light refraction structure covering the first insulating layer, the inside of the prismatic light refraction structure is filled with negative liquid crystal; the second light refraction structure layer comprises a second transparent substrate and a plurality of adjacent curved surface light refraction structures above the second transparent substrate, the inside of the curved surface light refraction structure is filled with positive liquid crystal; the first light refraction structure layer is used for adjusting the angle of light and transmitting to the second light refraction structure layer, the second light refraction structure layer is used for making the positive liquid crystal form a liquid crystal layer refractive index corresponding to a driving voltage according to the driving voltage, so as to switch a privacy display mode and a sharing display mode, and in the privacy display mode, the brightness in the front view range can be maintained and the power consumption of the backlight source is not increased.

Description

Technical Field

[0001] This application belongs to the field of display technology, and in particular relates to a privacy protection structure and its manufacturing method, and a liquid crystal display device. Background Technology

[0002] With the development of display devices such as smartphones, laptops, and tablets, people are using mobile display devices more frequently in public places, which leads to an increasing risk of personal information leakage.

[0003] The existing method of privacy protection in display devices mainly involves setting a privacy film on the liquid crystal display panel. Due to optical structure limitations, this reduces the light transmittance of the liquid crystal display panel, significantly reducing the brightness of the display device. To maintain the original brightness, the power consumption of the backlight of the display device is increased.

[0004] Existing technologies have the problem that display devices with privacy protection functions cannot simultaneously maintain brightness or control the power consumption of the backlight. Summary of the Invention

[0005] This application provides a privacy protection structure and its manufacturing method, as well as a liquid crystal display device, which can solve the problem that a display device with privacy protection function cannot simultaneously maintain brightness or the power consumption of the backlight.

[0006] In a first aspect, embodiments of this application provide a privacy protection structure, comprising: a first light refraction structure layer and a second light refraction structure layer stacked from bottom to top;

[0007] The first light refraction structure layer includes a first transparent substrate, a first insulating layer on the first transparent substrate, and a prismatic light refraction structure covering the first insulating layer, wherein the interior of the prismatic light refraction structure is filled with negative liquid crystal; the second light refraction structure layer includes a second transparent substrate and a plurality of adjacent curved light refraction structures on the second transparent substrate, wherein the interior of the curved light refraction structures is filled with positive liquid crystal.

[0008] The first light refraction structure layer is used to adjust the angle of light and transmit it to the second light refraction structure layer. The second light refraction structure layer receives the light after the angle has been adjusted by the first light refraction structure layer. The second light refraction structure layer is used to make the positive liquid crystal form a liquid crystal layer refractive index corresponding to the driving voltage according to the driving voltage, so as to switch between privacy display mode and shared display mode.

[0009] In one embodiment, the curved light refraction structure includes a transparent electrode layer on the second transparent substrate, a second insulating layer on the transparent electrode layer, a second convex lens covering the second insulating layer, a curved diffuser sheet connected to the second transparent substrate, and positive liquid crystal filling the space between the second convex lens and the curved diffuser sheet, wherein the curved diffuser sheet encloses the transparent electrode layer, the second insulating layer, and the second convex lens.

[0010] In one embodiment, the driving voltage includes a first driving voltage and a second driving voltage, and the refractive index of the liquid crystal layer includes a first refractive index of the liquid crystal layer and a second refractive index of the liquid crystal layer.

[0011] The second light-refracting structure layer is used to cause the positive liquid crystal to form a liquid crystal layer refractive index corresponding to the driving voltage, so as to switch between privacy display mode and shared display mode, including:

[0012] If the first driving voltage is zero volts, the positive liquid crystal is determined to be the refractive index of the first liquid crystal layer, and the privacy structure is a shared display mode;

[0013] If the second driving voltage is within the preset driving voltage range, the positive liquid crystal is determined to be the refractive index of the second liquid crystal layer, and the privacy structure is determined to be a privacy display mode.

[0014] In one embodiment, if the privacy structure is in a shared display mode, the refractive index of the first liquid crystal layer is greater than the first refractive index of the second convex lens;

[0015] If the privacy structure is in privacy display mode, the refractive index of the second liquid crystal layer is less than the first refractive index of the second convex lens.

[0016] In one embodiment, the refractive index of the first liquid crystal layer ranges from 1.60 to 1.75, the refractive index of the second liquid crystal layer ranges from 1.45 to 1.65, and the refractive index of the first liquid crystal layer ranges from 1.45 to 1.75.

[0017] In one embodiment, the privacy viewing angle of the privacy display mode is in the range of 45° to 70°, wherein the first side of the privacy viewing angle is parallel to the second transparent substrate, and the privacy viewing angle is the angle of rotation of the first side around the direction perpendicular to the normal of the second transparent substrate.

[0018] In one embodiment, the prismatic light refraction structure includes a first convex lens connected to the first insulating layer, a prism sheet having multiple prismatic protrusions, and negative liquid crystal filling the space between the first convex lens and the prism sheet, wherein the prismatic protrusions of the first convex lens and the prism sheet correspond one-to-one.

[0019] In one embodiment, the first light refraction structure layer is used to adjust the angle of light and transmit it to the second light refraction structure layer, including:

[0020] The refractive index of the third liquid crystal layer of the negative liquid crystal in the first light-refractive structure layer is less than the refractive index of the second convex lens, so as to focus the light and transmit it to the second light-refractive structure layer.

[0021] Secondly, embodiments of this application provide a method for manufacturing a privacy screen structure, including:

[0022] The first and second light refraction structure layers are formed from bottom to top;

[0023] The formation of the first light refraction structure layer includes: forming a first transparent substrate, forming a first insulating layer on the first transparent substrate, forming a plurality of adjacent first convex lenses on the first insulating layer, mounting a prism sheet covering each adjacent first convex lens on the first transparent substrate, the prism sheet having a plurality of prism-shaped protrusions, the first convex lens corresponding one-to-one with the prism-shaped protrusions of the prism sheet, and filling the space between the first convex lens and the prism sheet with negative liquid crystal.

[0024] The process of forming the second light refraction structure layer includes: forming a second transparent substrate; forming a plurality of non-contacting transparent electrode layers on the second transparent substrate; forming a second insulating layer on each of the transparent electrode layers; forming a second convex lens on each of the second insulating layers; mounting curved diffuser sheets covering each of the second convex lenses on the second transparent substrate; the curved diffuser sheets enclosing the transparent electrode layers, the second insulating layers, and the second convex lenses; and filling the space between the second convex lenses and the curved diffuser sheets with positive liquid crystal.

[0025] Thirdly, embodiments of this application provide a liquid crystal display device, including a liquid crystal display panel and a privacy structure as described in any one of the first aspects, wherein the privacy structure is used to provide a light source for the liquid crystal display panel and to switch between a privacy display mode and a shared display mode of the liquid crystal display panel.

[0026] It is understood that the beneficial effects of the second and third aspects mentioned above can be found in the relevant descriptions in the first aspect above, and will not be repeated here.

[0027] The beneficial effects of the embodiments in this application compared with the prior art are:

[0028] This application utilizes a first light refraction structure layer and a second light refraction structure layer stacked from bottom to top. The first light refraction structure layer includes a first transparent substrate, a first insulating layer on the first transparent substrate, and a prismatic light refraction structure covering the first insulating layer. The prismatic light refraction structure is filled with negative liquid crystal. The second light refraction structure layer includes a second transparent substrate and a plurality of adjacent curved light refraction structures on the second transparent substrate. The curved light refraction structures are filled with positive liquid crystal. The first light refraction structure layer is used to adjust the angle of light and transmit it to the second light refraction structure layer. The second light refraction structure layer receives the light whose angle has been adjusted by the first light refraction structure layer. The second light refraction structure layer is used to cause the positive liquid crystal to form a liquid crystal layer refractive index corresponding to the driving voltage, thereby switching between a privacy display mode and a shared display mode. Because the first light refraction structure layer increases the center brightness by adjusting the angle of the output light and transmits it to the second light refraction structure layer, the second light refraction structure layer can maintain brightness within the viewing range and prevent an increase in backlight power consumption when it has a privacy function, while also improving the contrast of the displayed image of the liquid crystal display device. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a cross-sectional structural diagram of an anti-peeping structure provided in an embodiment of this application;

[0031] Figure 2 This is a schematic diagram of the cross-sectional structure principle of a curved diffuser sheet that exhibits diffuse transmission on its outer surface, according to an embodiment of this application.

[0032] Figure 3 This is a schematic diagram of the cross-sectional structure principle of light divergence in a shared display mode provided in an embodiment of this application;

[0033] Figure 4 This is a schematic diagram of the cross-sectional structure principle of the privacy display mode light focusing provided in one embodiment of this application;

[0034] Figure 5 This is a cross-sectional structural diagram of the privacy viewing angle A and the angle B of the frontal viewing range provided in an embodiment of this application;

[0035] Figure 6 This is a schematic diagram illustrating the cross-sectional structure of a prism sheet using existing technology, showing that all light rays outside 70° of the prism's slope normal are lost.

[0036] Figure 7 This is a schematic diagram of the cross-sectional structure of a prism sheet according to an embodiment of this application, showing how the refracted light moves toward the center of the prism's convex protrusion.

[0037] Figure 8 This is a schematic diagram of the process for forming a first light refraction structure layer according to an embodiment of this application;

[0038] Figure 9 This is a schematic diagram of the process for forming a second light refraction structure layer according to an embodiment of this application;

[0039] Figure 10 This is a cross-sectional structural schematic diagram of the liquid crystal display device provided in the embodiments of this application.

[0040] Reference numerals for each figure:

[0041] 10. First light-refracting structure layer; 11. First transparent substrate; 12. First insulating layer; 13. Prism-shaped light-refracting structure; 14. Negative liquid crystal; 131. First convex lens; 132. Prism sheet; 133. Prism-shaped protrusion;

[0042] 20. Second light refraction structure layer; 21. Second transparent substrate; 22. Curved light refraction structure; 23. Positive liquid crystal; 221. Transparent electrode layer; 222. Second insulating layer; 223. Second convex lens; 224. Curved diffuser sheet;

[0043] 30. LCD display panel; 40. Backlight assembly. Detailed Implementation

[0044] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0045] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0046] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0047] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0048] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0049] The technical solution of this application will be described below through specific embodiments.

[0050] Firstly, such as Figure 1 As shown, this embodiment provides a privacy screen structure, including: a first light refraction structure layer 10 and a second light refraction structure layer 20 stacked from bottom to top; wherein, the first light refraction structure layer 10 includes a first transparent substrate 11, a first insulating layer 12 on the first transparent substrate 11, and a prismatic light refraction structure 13 covering the first insulating layer 12, the interior of the prismatic light refraction structure 13 being filled with negative liquid crystal 14; the second light refraction structure layer 20 includes a second transparent substrate 21 and a plurality of adjacent curved light refraction structures 22 on the second transparent substrate 21, the interior of the curved light refraction structures 22 being filled with positive liquid crystal 23; the first light refraction structure layer 10 is used to adjust the angle of light and transmit it to the second light refraction structure layer 20, the second light refraction structure layer 20 receives the light after the angle has been adjusted by the first light refraction structure layer 10, and the second light refraction structure layer 20 is used to cause the positive liquid crystal 23 to form a liquid crystal layer refractive index corresponding to the driving voltage according to the driving voltage, so as to switch between privacy screen display mode and shared display mode. Since the first light refraction structure layer 10 increases the center brightness by adjusting the angle of the output light and transmits it to the second light refraction structure layer 20, the second light refraction structure layer 20 can maintain the brightness within the viewing range and keep the power consumption of the backlight from increasing when it has the privacy function, while also improving the contrast of the display screen of the liquid crystal display device.

[0051] In one embodiment, the curved light refraction structure 22 includes a transparent electrode layer 221 on the second transparent substrate 21, a second insulating layer 222 on the transparent electrode layer 221, a second convex lens 223 covering the second insulating layer 222, a curved diffuser 224 connected to the second transparent substrate 21, and positive liquid crystal 23 filling the space between the second convex lens 223 and the curved diffuser 224. The curved diffuser 224 encloses the transparent electrode layer 221, the second insulating layer 222, and the second convex lens 223. Since light passes sequentially from below the first light refraction structure layer 10 through the second convex lens 223, the positive liquid crystal 23, and the curved diffuser 224, diffuse transmission occurs on the outer surface of the curved diffuser 224. Figure 2 As shown, the light source distribution is more uniform, which reduces halos and improves the user experience.

[0052] In one embodiment, the outer diameter of the curved diffuser 224 of the curved light refraction structure 22 ranges from 1 μm to 5 μm, and the thickness of the curved diffuser 224 ranges from 0.055 mm to 0.2 mm. Since the second light refraction structure layer 20 includes multiple curved light refraction structures 22 to form a diffuser array layer, the overall light output of the privacy structure is uniform, halo effect is reduced, and user experience is improved.

[0053] In one embodiment, the transmittance of the curved diffuser 224 is in the range of 80% to 99%, which is beneficial for allowing more light to pass through the curved diffuser 224 and improving the brightness of the liquid crystal display device.

[0054] In one embodiment, the driving voltage includes a first driving voltage and a second driving voltage, and the refractive index of the liquid crystal layer includes the first refractive index n of the liquid crystal layer. e The refractive index n of the second liquid crystal layer o This facilitates the formation of the corresponding refractive index of the liquid crystal layer after the application of the driving voltage, so as to switch between privacy display mode and shared display mode.

[0055] In one embodiment, the second light-refracting structure layer 20 is used to cause the positive liquid crystal 23 to form a liquid crystal layer refractive index corresponding to the driving voltage, so as to switch between the privacy display mode and the shared display mode, including: if the first driving voltage V1 is zero volts, determining that the positive liquid crystal 23 has a first liquid crystal layer refractive index n. e The privacy screen structure is a shared display mode. Since the first driving voltage V1 applied to the transparent electrode layer 221 is zero volts, the positive liquid crystal 23 exhibits the refractive index n of the first liquid crystal layer. e This allows the privacy screen structure to be in shared display mode; if the second driving voltage V2 is within the preset driving voltage range, the positive liquid crystal 23 is determined to be the refractive index n of the second liquid crystal layer. o, the anti-peeping structure is in the anti-peeping display mode. Since the second driving voltage V2 applied to the transparent electrode layer 221 is within the preset driving voltage range, the positive liquid crystal 23 exhibits a second liquid crystal layer refractive index n o , so that the anti-peeping structure is in the privacy display mode. By changing the driving voltage, the positive liquid crystal 23 forms a corresponding liquid crystal layer refractive index, realizing the switching between the anti-peeping display mode and the shared display mode, protecting the user's privacy information, and enhancing the user experience.

[0056] In one embodiment, the preset driving voltage range is any value from 2V to 7V to drive the positive liquid crystal 23 to form a second liquid crystal layer refractive index n o , so that the anti-peeping structure is in the privacy display mode. In addition, when the second driving voltage V2 satisfies 0V < V2 < 2V, the positive liquid crystal 23 is in the first liquid crystal layer refractive index n e to the transition state of the second liquid crystal layer refractive index n o .

[0057] In one embodiment, if the anti-peeping structure is in the shared display mode, the first liquid crystal layer refractive index n e is greater than the first refractive index n1 of the second convex lens 223. As shown in Figure 3 , according to the optical refraction law, since the first liquid crystal layer refractive index n e is greater than the first refractive index n1 of the second convex lens 223, when the light passes through the positive liquid crystal 23 from the second convex lens 223, the refraction angle is greater than the incident angle, and the light diverges at the surface of the second convex lens 223 and then is output through the curved diffusion sheet 224, expanding the viewing angle of the liquid crystal display device and forming the shared display mode; if the anti-peeping structure is in the anti-peeping display mode, the second liquid crystal layer refractive index n o is less than the first refractive index n1 of the second convex lens 223. As shown in Figure 4 , according to the optical refraction law, since the second liquid crystal layer refractive index n o is less than the first refractive index n1 of the second convex lens 223, when the light passes through the positive liquid crystal 23 from the second convex lens 223, the refraction angle is less than the incident angle, and the light converges at the surface of the second convex lens 223 and then is output through the curved diffusion sheet 224, reducing the viewing angle of the liquid crystal display device and forming the anti-peeping display mode.

[0058] In one embodiment, the value range of the first liquid crystal layer refractive index n e is 1.60 - 1.75, the value range of the second liquid crystal layer refractive index n o is 1.45 - 1.65, and the value range of the first refractive index n1 is 1.45 - 1.75; according to the corresponding refractive index, the required anti-peeping viewing angle range is formed, improving the experience effect of the anti-peeping display mode.

[0059] In one embodiment, such as Figure 5 As shown, the privacy viewing angle A of the privacy display mode ranges from 45° to 70°. The first side of the privacy viewing angle is parallel to the second transparent substrate 21. The privacy viewing angle is the angle of rotation of the first side in the direction perpendicular to the normal of the second transparent substrate 21. Therefore, the angle B of the user's viewing range ranges from 40° to 90°, which helps the user protect their privacy from being seen by others in the privacy display mode and improves the user experience.

[0060] In one embodiment, such as Figure 1 As shown, the prismatic light refraction structure 13 includes a first convex lens 131 connected to the first insulating layer 12, a prism sheet 132 having multiple prismatic protrusions 133, and a negative liquid crystal 14 filling the space between the first convex lens 131 and the prism sheet 132. The prismatic protrusions of the first convex lens 131 and the prism sheet 132 correspond one-to-one. Unlike existing prism sheets, which would lose all light rays outside 70° of the prism sheet's slope normal (e.g., ... Figure 6 Compared to the previous method, the addition of a first convex lens 131 and a negative liquid crystal 14 allows backlight incident from below the first light refraction structure layer 10 to be refracted and focused into the negative liquid crystal 14 by the first convex lens 131. Then, through refraction by the prism sheet 132, the refracted light is directed towards the center of the prism-shaped protrusion of the prism sheet 132 (as shown). Figure 7 As shown), the first light refraction structure layer 10 increases the center brightness by adjusting the angle of the output light and transmits it to the second light refraction structure layer 20. This allows the second light refraction structure layer 20 to maintain the brightness within the viewing range while having the privacy function, and to keep the power consumption of the backlight from increasing. At the same time, because the first light refraction structure layer 10 increases the brightness within the viewing range, it improves the contrast between the bright and dark parts of the image within the viewing range, and also improves the contrast of the image displayed by the liquid crystal display device.

[0061] In one embodiment, such as Figure 7As shown, the first light refraction structure layer 10 is used to adjust the angle of light and transmit it to the second light refraction structure layer 20. It includes a third liquid crystal layer in the negative liquid crystal 14 of the first light refraction structure layer 10 with a refractive index lower than the second refractive index of the first convex lens 131, thereby focusing the light and transmitting it to the second light refraction structure layer 20. According to the law of optical refraction, since the refractive index n3 of the third liquid crystal layer of the negative liquid crystal 14 is lower than the second refractive index n2 of the first convex lens 131, when light enters the negative liquid crystal 14 from below the first light refraction structure layer 10 through the first convex lens 131, the angle of refraction is smaller than the angle of incidence. The light is refracted and focused in the negative liquid crystal 14 towards the center of the first convex lens 131, and then refracted by the prism sheet 132, causing the refracted light to approach the center of the prism protrusion of the prism sheet 132, thus increasing the brightness of the center of the prism sheet 132. For example, compared to not having the first convex lens 131 and the negative liquid crystal 14, the brightness of the center of the prism sheet 132 is increased by 10% to 100%.

[0062] In one embodiment, the vertex angle of the prism protrusion of the prism sheet 132 ranges from 80° to 100°, the distance between the vertices of adjacent prism protrusions of the prism sheet 132 ranges from 24μm to 50μm, and the thickness of the prism sheet 132 ranges from 0.1mm to 0.25mm, which is beneficial for the prism sheet 132 to focus light onto the second light refraction structure layer 20.

[0063] The beneficial effects of the embodiments in this application compared with the prior art are:

[0064] This application utilizes a first light-refracting structure layer 10 and a second light-refracting structure layer 20 stacked from bottom to top. The first light-refracting structure layer 10 includes a first transparent substrate 11, a first insulating layer 12 on the first transparent substrate 11, and a prismatic light-refracting structure 13 covering the first insulating layer 12. The prismatic light-refracting structure 13 is filled with negative liquid crystal 14. The second light-refracting structure layer 20 includes a second transparent substrate 21 and a plurality of adjacent curved light-refracting structures 22 on the second transparent substrate 21. The curved light-refracting structures 22 are filled with positive liquid crystal 23. The first light-refracting structure layer 10 is used to adjust the angle of light and transmit it to the second transparent substrate 21. The second light refraction structure layer 20 receives light after the angle has been adjusted by the first light refraction structure layer 10. The second light refraction structure layer 20 is used to make the positive liquid crystal 23 form a liquid crystal layer refractive index corresponding to the driving voltage according to the driving voltage, so as to switch between privacy display mode and shared display mode. Since the first light refraction structure layer 10 increases the center brightness by adjusting the angle of the output light and transmits it to the second light refraction structure layer 20, the second light refraction structure layer 20 can maintain the brightness within the viewing range and keep the power consumption of the backlight from increasing when it has privacy function, while also improving the contrast of the display screen of the liquid crystal display device.

[0065] Secondly, this embodiment provides a method for manufacturing an anti-peeping structure, including:

[0066] A first light refraction structure layer 10 and a second light refraction structure layer 20 are formed from bottom to top.

[0067] In one embodiment, such as Figure 8 As shown, the first light refraction structure layer 10 includes:

[0068] S110, forming the first transparent substrate 11.

[0069] S120, a first insulating layer 12 is formed on the first transparent substrate 11.

[0070] S130, a plurality of adjacent first convex lenses 131 are formed on the first insulating layer 12.

[0071] S140, a prism sheet 132 covering each adjacent first convex lens 131 is mounted on the first transparent substrate 11. The prism sheet 132 has a plurality of prism-shaped protrusions 133, and the first convex lens 131 corresponds one-to-one with the prism-shaped protrusions of the prism sheet 132.

[0072] S150, negative liquid crystal 14 is filled between the first convex lens 131 and the prism sheet 132.

[0073] In one embodiment, such as Figure 9 As shown, the second light refraction structure layer 20 includes:

[0074] S210, forming the second transparent substrate 21.

[0075] S220, a plurality of non-contact transparent electrode layers 221 are formed on the second transparent substrate 21.

[0076] S230, a second insulating layer 222 is formed on each transparent electrode layer 221.

[0077] S240, a second convex lens 223 is formed on each of the second insulating layers 222.

[0078] S250, curved diffuser sheets 224 covering each of the second convex lenses 223 are respectively installed on the second transparent substrate 21. The curved diffuser sheets 224 wrap the transparent electrode layer 221, the second insulating layer 222 and the second convex lens 223.

[0079] S260, positive liquid crystal 23 is filled between the second convex lens 223 and the curved diffuser 224.

[0080] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0081] The beneficial effects of the embodiments in this application compared with the prior art are:

[0082] This application involves forming a first light-refracting structure layer 10 and a second light-refracting structure layer 20 stacked from bottom to top. The first light-refracting structure layer 10 includes a first transparent substrate 11, a first insulating layer 12 on the first transparent substrate 11, and a prismatic light-refracting structure 13 covering the first insulating layer 12. The prismatic light-refracting structure 13 is filled with negative liquid crystal 14. The second light-refracting structure layer 20 includes a second transparent substrate 21 and a plurality of adjacent curved light-refracting structures 22 on the second transparent substrate 21. The curved light-refracting structures 22 are filled with positive liquid crystal 23. The first light-refracting structure layer 10 is used to adjust the angle of light and transmit it to… The second light refraction structure layer 20 receives light after the angle has been adjusted by the first light refraction structure layer 10. The second light refraction structure layer 20 is used to make the positive liquid crystal 23 form a liquid crystal layer refractive index corresponding to the driving voltage according to the driving voltage, so as to switch between the privacy display mode and the shared display mode. Since the first light refraction structure layer 10 increases the center brightness by adjusting the angle of the output light and transmits it to the second light refraction structure layer 20, the second light refraction structure layer 20 can maintain the brightness within the viewing range and keep the power consumption of the backlight from increasing when it has the privacy function. At the same time, it also improves the contrast of the display screen of the liquid crystal display device.

[0083] Thirdly, this embodiment provides a liquid crystal display device, including a liquid crystal display panel 30 and a privacy structure as described in any one of the first aspects. The privacy structure is used to provide a light source for the liquid crystal display panel 30 and to switch between a privacy display mode and a shared display mode of the liquid crystal display panel 30.

[0084] It should be noted that the liquid crystal display device in this example also includes a backlight assembly 40, which provides a light source for the privacy screen structure. The privacy screen structure is located between the liquid crystal display panel 30 and the backlight assembly 40, such as... Figure 10 As shown.

[0085] It is understood that the beneficial effects of the second and third aspects mentioned above can be found in the relevant descriptions in the first aspect above, and will not be repeated here.

[0086] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0087] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0088] In the embodiments provided in this application, it should be understood that the disclosed apparatus / network devices and methods can be implemented in other ways. For example, the apparatus / network device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0089] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0090] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A privacy structure, characterized by, The application relates to a privacy display device. The privacy display device comprises a first light refraction structure layer and a second light refraction structure layer stacked from bottom to top. The first light refraction structure layer comprises a first transparent substrate, a first insulating layer on the first transparent substrate and a prismatic light refraction structure covering the first insulating layer, the prismatic light refraction structure being filled with negative liquid crystal; the second light refraction structure layer comprises a second transparent substrate and a plurality of adjacent curved light refraction structures on the second transparent substrate, the curved light refraction structures being filled with positive liquid crystal, the curved light refraction structures comprising a transparent electrode layer on the second transparent substrate, a second insulating layer on the transparent electrode layer, a second convex lens covering the second insulating layer, a curved diffusion sheet connected to the second transparent substrate and positive liquid crystal filled between the second convex lens and the curved diffusion sheet, the curved diffusion sheet wrapping the transparent electrode layer, the second insulating layer and the second convex lens. The first light refraction structure layer is used for adjusting the angle of light to concentrate the light and transmitting the light to the second light refraction structure layer, the second light refraction structure layer receives the light whose angle is adjusted by the first light refraction structure layer, and the second light refraction structure layer is used for forming a liquid crystal layer refractive index corresponding to a driving voltage by the positive liquid crystal according to the driving voltage to switch a privacy display mode and a sharing display mode.

2. The privacy structure of claim 1, wherein, The driving voltage comprises a first driving voltage and a second driving voltage, and the liquid crystal layer refractive index comprises a first liquid crystal layer refractive index and a second liquid crystal layer refractive index. The second light refraction structure layer is used for forming a liquid crystal layer refractive index corresponding to a driving voltage by the positive liquid crystal according to the driving voltage to switch a privacy display mode and a sharing display mode, comprising: If the first driving voltage is zero volt, the positive liquid crystal is determined as the first liquid crystal layer refractive index, and the privacy structure is the sharing display mode. If the second driving voltage is in a preset driving voltage range, the positive liquid crystal is determined as the second liquid crystal layer refractive index, and the privacy structure is the privacy display mode.

3. The privacy structure of claim 2, wherein, If the privacy structure is the sharing display mode, the first liquid crystal layer refractive index is greater than a first refractive index of the second convex lens. If the privacy structure is the privacy display mode, the second liquid crystal layer refractive index is less than the first refractive index of the second convex lens.

4. The privacy structure of claim 3, wherein, The first liquid crystal layer refractive index ranges from 1.60 to 1.75, the second liquid crystal layer refractive index ranges from 1.45 to 1.65, and the first refractive index ranges from 1.45 to 1.

75.

5. The privacy structure of claim 1, wherein, The privacy display mode has a privacy viewing angle ranging from 45 degrees to 70 degrees, wherein a first side of the privacy viewing angle is parallel to the second transparent substrate, and the privacy viewing angle is an angle of rotation of the first side around a direction perpendicular to a normal line of the second transparent substrate.

6. The privacy structure of claim 1, wherein, The prismatic light refraction structure comprises a first convex lens connected to the first insulating layer, a prismatic sheet having a plurality of prismatic convex bodies and negative liquid crystal filled between the first convex lens and the prismatic sheet, and the first convex lens and the prismatic convex bodies of the prismatic sheet are in one-to-one correspondence.

7. The privacy structure of claim 6, wherein, The first light refraction structure layer is configured to adjust the angle of the light and transmit the light to the second light refraction structure layer, comprising: The third liquid crystal layer of the negative liquid crystal of the first light refraction structure layer has a refractive index smaller than the second refractive index of the first convex lens, so as to concentrate the light and transmit the light to the second light refraction structure layer.

8. A method for manufacturing a privacy structure, characterized by, Comprising: The first light refraction structure layer and the second light refraction structure layer are formed in a stack from bottom to top; The first light refraction structure layer is formed by forming a first transparent substrate, forming a first insulating layer on the first transparent substrate, forming a plurality of adjacent first convex lenses on the first insulating layer, mounting a prism sheet covering each adjacent first convex lens on the first transparent substrate, the prism sheet having a plurality of prismatic protrusions, the first convex lens corresponding to the prismatic protrusion of the prism sheet one by one, and filling the negative liquid crystal between the first convex lens and the prism sheet; The second light refraction structure layer is formed by forming a second transparent substrate, forming a plurality of transparent electrode layers not in contact with each other on the second transparent substrate, forming a second insulating layer on each transparent electrode layer, respectively, forming a second convex lens on each second insulating layer, respectively, mounting a curved diffusion sheet covering each second convex lens on the second transparent substrate, respectively, the curved diffusion sheet wrapping the transparent electrode layer, the second insulating layer and the second convex lens, and filling the positive liquid crystal between the second convex lens and the curved diffusion sheet; The first light refraction structure layer is configured to adjust the angle of the light to concentrate the light and transmit the light to the second light refraction structure layer, the second light refraction structure layer receives the light whose angle is adjusted by the first light refraction structure layer, and the second light refraction structure layer is configured to form a liquid crystal layer refractive index corresponding to a driving voltage according to the driving voltage, so as to switch between the privacy display mode and the sharing display mode.

9. A liquid crystal display device, characterized by comprising: The privacy structure comprises a liquid crystal display panel and any one of the privacy structures according to claims 1 to 7, the privacy structure is configured to provide a light source for the liquid crystal display panel and realize the switching between the privacy display mode and the sharing display mode of the liquid crystal display panel.

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