A polarizing assembly and display device

Abstract

The application discloses a polarizing assembly and a display device. The polarizing assembly comprises a polarizing film layer and a privacy function layer located on one side of the polarizing film layer. In a first direction, the privacy function layer comprises a plurality of barrier walls arranged in sequence, and a light transmission layer is arranged between adjacent barrier walls. The first direction is parallel to the plane in which the polarizing film layer is located. The technical scheme of the application adds a privacy function layer to the polarizing assembly. The privacy function layer comprises a plurality of barrier walls arranged in sequence, and a light transmission layer is arranged between adjacent barrier walls. The polarizing assembly can limit the light exit angle based on the barrier walls in the privacy function layer, so that the display device with the polarizing assembly has a required display viewing angle and realizes the privacy display function.

Description

Technical Field

[0001] This application relates to the field of display technology, and more specifically, to a polarizing component and a display device. Background Technology

[0002] With the development of science and technology, more and more display devices are being widely used in people's daily lives and work, bringing great convenience to people's daily lives and work, and becoming an indispensable tool for people today.

[0003] Currently, most display devices lack privacy features, and users have a strong demand for adding privacy functionality to display devices. How to implement privacy display functionality in display devices has become an urgent problem to be solved in the field of display technology. Summary of the Invention

[0004] In view of this, this application provides a polarizing component and a display device, the solution of which is as follows:

[0005] This application provides a polarizing component, including:

[0006] Polarizing film;

[0007] A privacy protection layer located on one side of the polarizing film layer;

[0008] In the first direction, the privacy protection layer includes a plurality of sequentially arranged barriers; a light-transmitting layer is provided between adjacent barriers; the first direction is parallel to the plane in which the polarizing film layer is located.

[0009] This application also provides a display device that includes the aforementioned polarizing component.

[0010] The polarizing component and display device provided in this application incorporate a privacy protection layer within the polarizing component. This privacy protection layer includes multiple sequentially arranged barriers, with a light-transmitting layer between adjacent barriers. Based on the barriers in the privacy protection layer, the polarizing component can limit the light emission angle, thereby enabling the display device with the polarizing component to have the desired viewing angle and achieving a privacy display function. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0012] The structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this application. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this application can produce, should still fall within the scope of the technical content disclosed in this application.

[0013] Figure 1 A partial cross-sectional view of a polarizing component provided in an embodiment of this application;

[0014] Figure 2 A top view of a privacy protection layer provided for the implementation of this application;

[0015] Figure 3 A top view of another privacy protection layer provided in an embodiment of this application;

[0016] Figure 4 A top view of yet another privacy protection layer provided in the embodiments of this application;

[0017] Figure 5 A top view of yet another privacy protection layer provided in the embodiments of this application;

[0018] Figure 6 A cross-sectional view of a privacy protection layer provided in an embodiment of this application;

[0019] Figure 7 for Figure 6 The diagram shown illustrates the principle by which the privacy protection layer achieves its privacy protection function.

[0020] Figure 8 A cross-sectional view of another privacy protection layer provided in an embodiment of this application;

[0021] Figure 9 A partial cross-sectional view of another polarizing component provided in an embodiment of this application;

[0022] Figure 10 A partial cross-sectional view of another polarizing component provided in an embodiment of this application;

[0023] Figure 11 This is a schematic diagram of the structure of a polarizing component provided in an embodiment of this application;

[0024] Figure 12 This is a schematic diagram of another polarizing component provided in an embodiment of this application;

[0025] Figure 13 This is a schematic diagram of the structure of another polarizing component provided in an embodiment of this application;

[0026] Figure 14 This is a schematic diagram of the structure of another polarizing component provided in an embodiment of this application;

[0027] Figure 15 A partial structural schematic diagram of another polarizing component provided in an embodiment of this application;

[0028] Figure 16 A partial structural schematic diagram of another polarizing component provided in an embodiment of this application;

[0029] Figure 17 This is a schematic diagram of the structure of a display device provided in an embodiment of this application. Detailed Implementation

[0030] The embodiments of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0031] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] refer to Figure 1 As shown, Figure 1 A partial cross-sectional view of a polarizing component provided in an embodiment of this application shows that the polarizing component includes:

[0033] Polarizing film layer 11;

[0034] Privacy protection layer 12 located on one side of polarizing film layer 11;

[0035] In the first direction F1, the privacy function layer 12 includes a plurality of sequentially arranged barrier walls 121; there is a light-transmitting layer 122 between adjacent barrier walls 121; the first direction F1 is parallel to the plane where the polarizing film layer 11 is located.

[0036] In the polarizing assembly provided in this application embodiment, the privacy protection layer 12 has a plurality of baffles 121 arranged on one side in the first direction F1. The light incident on the polarizing assembly propagates based on the light-transmitting layer 122 between adjacent baffles 121, thereby limiting the transmission direction and transmission angle of the light emitted through the polarizing assembly, so that the display device with the polarizing assembly has a privacy protection function.

[0037] In addition, the polarizing component provided in this application integrates the polarizing film layer 11 and the privacy protection layer 12, which is equivalent to a polarizing film with privacy protection function, improving the integration of the device and facilitating the realization of a thinner and lighter design of the device.

[0038] The barrier 121 is a black light-absorbing structure, capable of absorbing incident light. Optionally, the barrier 121 can be a patterned adhesive layer mixed with a black additive. The black additive can be toner or other black material powder.

[0039] refer to Figure 2 As shown, Figure 2 A top view of a privacy protection layer provided for the implementation of this application, combined with Figure 1 and Figure 2 As shown, the extension direction of the barrier 121 is the second direction F2; the second direction F2 is parallel to the plane where the polarizing film layer 11 is located; the angle θ between the second direction F2 and the first direction F1 is not less than 75° and not greater than 105°. Figure 2 The illustration uses an angle θ = 75° as an example.

[0040] refer to Figure 3 As shown, Figure 3 This is a top view of another privacy protection layer provided in an embodiment of this application. In this illustration, the included angle θ = 105° is used as an example.

[0041] The barrier 121 has a first vertical projection on the plane containing the polarizing film layer 11. Figure 2 and Figure 3 In the illustrated method, the first vertical projection is a straight line segment as an example for illustration.

[0042] In one embodiment of this application, it can be as follows: Figure 2 and Figure 3 As shown, the first vertical projection is set as a straight line segment extending along the second direction F2; the baffles 121 are arranged at equal intervals in the first direction F1; the second direction F2 is parallel to the plane where the polarizing film layer 11 is located. In this method, multiple baffles 121 are arranged at equal intervals in the first direction F1, which facilitates the fabrication of the baffles 121, making the manufacturing process of the polarizing component simple and the manufacturing cost low.

[0043] In other methods, the first vertical projection can also be as shown in 4 and Figure 5 The non-linear segment shown.

[0044] refer to Figure 4 As shown, Figure 4 This is a top view of another privacy protection layer provided in the embodiments of this application. In this method, the included angle θ = 75° and the first vertical projection is a broken line segment are used as an example for illustration.

[0045] refer to Figure 5 As shown, Figure 5This is a top view of another privacy protection layer provided in the embodiments of this application. In this method, the included angle θ = 105° and the first vertical projection is a broken line segment are used as an example for illustration.

[0046] In this embodiment, 75° ≤ θ ≤ 105°, where θ can be any angle not less than 75° and not greater than 105°, and θ is not limited to 75° or 105°. When the polarizing component is used in a display device, the shape of the polarizing component is adapted to the display device. Taking a rectangular polarizing component as an example, the rectangle includes: a first and a second side that are relatively parallel; and a third and a fourth side that are relatively parallel. Figures 2-5 In the diagram, the top and bottom edges of the rectangle are the first and second edges, respectively, while the left and right edges are the third and fourth edges, respectively.

[0047] The first and second sides are both parallel to the first direction F1. The third and fourth sides are also aligned with the first direction F1. The third and fourth sides correspond to the left and right sides of the display device, respectively. When a user holds the display device to view the image, since 75°≤θ≤105°, the light emitted from the display device at large viewing angles on the left and right sides can be effectively blocked, thus effectively preventing other people on the left and right sides of the display device from peeping at the displayed content.

[0048] Taking mobile phones as an example, in Figures 2-5 In the illustrated configuration, the left and right sides of the privacy shield layer 12 correspond to the left and right sides of the phone, respectively. Since 75°≤θ≤105°, the angle between the extension direction of the barrier 121 and the straight line containing the left or right side of the phone does not exceed 15°, and the extension direction of the barrier 121 is closer to the straight line containing the left or right side of the phone. Thus, light is restricted by the barrier 121, preventing it from escaping at large angles towards the left or right side of the phone. Other individuals located to the left or right of the phone user are limited by the angle of light from the barrier 121 and cannot see the image displayed on the phone. Furthermore, there is usually a distance between the phone and the user's eyes; this distance ensures that light within a 15° viewing angle is effectively received by the user, preventing the user from effectively viewing the image displayed on the phone. It should be noted that in this embodiment, the angle between the second direction F2 and the first direction F1 can be set based on privacy requirements, and is not limited to 75°≤θ≤105°.

[0049] In one embodiment of this application, it can be as follows: Figure 4 and Figure 5As shown, the first vertical projection is set as a non-linear segment along the second direction F2. The non-linear segment is a broken line or curve that extends non-periodically in the second direction F2. Setting the first vertical projection as a non-linear segment allows the distance between the retaining walls 121 to be randomly distributed, and also allows the angles between different positions of the same first vertical projection in the second direction F2 and the first direction F1 to be randomly distributed, thereby avoiding the moiré pattern problem caused by periodic structures.

[0050] When the first vertical projection is a non-straight line segment, the maximum width between two adjacent retaining walls 121 is Wmax, and the minimum width is Wmin. Wmax-Wmin≤40%W0, which means that the average variation of the distance between two adjacent retaining walls 121 is 20%W0. Here, W0 is the average distance between two adjacent retaining walls 121. For the non-straight line segment of retaining wall 121, along the second direction F2, the distance between retaining walls 121 is set to vary randomly based on W0 to avoid the moiré pattern problem caused by all retaining walls 121 using the same periodic structure.

[0051] Based on a given W0, the spacing between two adjacent retaining walls 121 can be set in the second direction F2, based on Wmax-Wmin≤40%W0, and randomly distributed. This ensures the privacy protection effect while effectively preventing moiré patterns.

[0052] When the first vertical projection is a straight line segment, the non-straight line segment includes multiple interconnected first line segments. For the same first vertical projection, the angle Δθ between the first line segment and the second direction F2 is no greater than 10°. For the first vertical projection of a non-straight line segment, the first vertical projection has multiple peaks and troughs alternately distributed along the second direction F2. For a given angle θ, along the second direction F2, the maximum angle between the first vertical projection and the first direction F1 at different positions is θ + Δθ, and the minimum angle between the first vertical projection and the first direction F1 at different positions is θ - Δθ, where 0° < Δθ ≤ 10°. The value of Δθ can be set according to requirements. For the same retaining wall 121 of a non-straight line segment, based on a given θ, along the second direction F2, the angle θ is set to be based on θ + Δθ, and varies randomly to avoid the moiré pattern problem caused by all retaining walls 121 using the same periodic structure with the same angle θ.

[0053] Setting 0°<△θ≤10° allows θ to be randomly set with small variations, avoiding the formation of small bends between adjacent first line ends due to excessively large △θ, which would increase the difficulty of the preparation process of retaining wall 121.

[0054] Optionally, for the aforementioned non-straight segments, the non-straight segments include multiple interconnected first line segments; wherein, for the same first vertical projection, at least two first line segments have different lengths, and / or, at least two first line segments have different angles with the second direction F2. For the same first vertical projection, by setting the lengths of the first line segments to be randomly distributed, and / or the angles between adjacent first straight segments and the second direction F2 to be randomly distributed, the random distribution of the spacing between adjacent retaining walls 121 and the random distribution of the angle θ are achieved to prevent moiré pattern problems.

[0055] When the first vertical projection is a straight line segment, the distance between any two adjacent retaining walls 121 in the second direction F2 is W0. When the first vertical projection is a non-straight line structure, the average distance between any two adjacent retaining walls 121 is W0, and the distance between any two adjacent retaining walls 121 in the second direction F2 varies randomly based on W0. In this embodiment, the value of W0 can be set according to requirements. The value range of W0 is 10–100 μm.

[0056] refer to Figure 6 and Figure 7 As shown, Figure 6 This is a cross-sectional view of a privacy protection layer provided in an embodiment of this application. Figure 7 for Figure 6 The diagram illustrates the principle behind the privacy protection layer's privacy function. For clarity, the diagram shows the direction of light propagation. Figure 7 The middle part indicates that Figure 6 The image shows a magnified view of a local area. In the first direction F1, the light-transmitting layer 122 between adjacent retaining walls 121 includes: two opposing first light-transmitting film layers 21 and a second light-transmitting film layer 22 located between the first light-transmitting film layers 21. The refractive index of the first light-transmitting film layer 21 is less than the refractive index of the second light-transmitting film layer 22. The refractive index of the first light-transmitting film layer 21 is set to n1, and the refractive index of the second light-transmitting film layer 22 is set to n2, where n1 < n2.

[0057] The arrows inside the privacy shield layer 12 indicate the direction of light transmission. Since n1 < n2, the second transparent film layer 22 is an optically denser medium, and the first transparent film layer 21 is an optically less dense medium. Figure 6 and Figure 7 In the illustrated method, since n1 < n2, based on the principle of total internal reflection, light rays incident at a large angle on the second transparent film layer 22 can pass through the interface between the second transparent film layer 22 and the first transparent film layer 21, and be absorbed by the barrier wall 121. This allows light rays incident at a small angle on the second transparent film layer 22 to undergo total internal reflection at the interface between the second transparent film layer 22 and the first transparent film layer 21, thus exiting from the other side of the second transparent film layer 22. This enables control over the exit angle of the transmitted light from the polarizing component, thereby giving the polarizing component an anti-peeping function. Figure 7In the above, for light rays incident on the second transparent film layer 22, the incident angle b is greater than the incident angle a. Since b and d are complementary angles, and a and c are complementary angles, c is greater than d. Therefore, when c satisfies the condition for total internal reflection and d does not, for light rays incident on the second transparent film layer 22, the incident angle a is a small angle of incidence, and the incident angle b is a large angle of incidence.

[0058] Compared to the use of a light-transmitting layer 122 with a single refractive index between the two barrier walls 121, in Figure 6 and Figure 7 In the method shown, the privacy function is achieved based on total internal reflection, which allows the light that undergoes total internal reflection to pass smoothly through the privacy function layer 12, ensuring high light transmittance, and also playing a role in narrowing the viewing angle.

[0059] For light rays incident from one side of the second light-transmitting film layer 22, when the light rays travel from the second light-transmitting film layer 22 to the first light-transmitting film layer 21, if the incident angle c at the interface between the second light-transmitting film layer 22 and the first light-transmitting film layer 21 is not less than the critical angle of total internal reflection, total internal reflection can occur at the interface, so that the light rays only travel within the second light-transmitting film layer 22 and finally exit from the other side of the second light-transmitting film layer 22; if the incident angle d at the interface between the second light-transmitting film layer 22 and the first light-transmitting film layer 21 is less than the critical angle of total internal reflection, the light rays will pass through the interface and thus enter the surface of the barrier wall 121, where this portion of the light rays will be absorbed by the barrier wall 121.

[0060] As mentioned above, the refractive index of the first transparent film layer 21 is set to n1, and the refractive index of the second transparent film layer 22 is set to n2. For a given material, the refractive indices of the first and second transparent film layers 21 are constants, meaning n1 and n2 can be determined based on the transparent material used. Let C be the critical angle for total internal reflection corresponding to the second transparent film layer 22 and the first transparent film layer 21, then:

[0061]

[0062] like Figure 7 As shown, the incident angle of the light rays incident from one side of the second transparent film 22 is set as 'a', and the incident angle of the light rays incident on the interface between the second transparent film layer 22 and the first transparent film layer 21 is set as 'c'. 'a' and 'c' satisfy the following relationship:

[0063] a+c=90° (2)

[0064] If total internal reflection can occur at the incident angle c of the interface, then the following conditions must be met:

[0065]

[0066] In this embodiment of the application, the critical angle C for total internal reflection is set to satisfy the following relationship:

[0067]

[0068] Based on the above relationships (1)-(4), we know that a≤45°.

[0069] Similarly, if the angle of incidence d of the light at the interface is less than the critical angle C for total internal reflection, then the following condition is met:

[0070]

[0071] In addition, since b+d=90°, b>45°, when the incident angle b is greater than 45°, the light rays incident from the second light-transmitting film layer 22 can pass through the interface between the second light-transmitting film layer 22 and the first light-transmitting film layer 21 and be incident on the surface of the barrier wall 121 and absorbed by the barrier wall.

[0072] As can be seen from the above description, in this embodiment of the application, by selecting a light-transmitting material with a suitable refractive index, light rays incident from one side of the second light-transmitting film layer 22 can all be incident from one side of the second light-transmitting film layer 22 and exit from the other side of the second light-transmitting film layer 22 based on total internal reflection when the incident angle a is less than 45°. When the incident angle b is greater than 45°, the light rays do not meet the condition of total internal reflection, and thus can be incident on the surface of the barrier wall 121 and absorbed by the barrier wall.

[0073] Preferably, the refractive indices of the two light-transmitting film layers can be set so that a ≤ 35°. Based on requirements, light-transmitting materials with different refractive indices can be selected to prepare the first light-transmitting film layer 21 and the second light-transmitting film layer 22, thereby setting the viewing angle range of the light emitted from the polarizing component.

[0074] In one embodiment of this application, in the first direction F1, the width of the first light-transmitting film layer 21 is set to W1, the width of the second light-transmitting film layer 22 is set to W2, and the width of the barrier wall 121 is set to W3; wherein, W2 > W3 > W1. The second light-transmitting film layer 22 is the light-transmitting window of the polarizer, and the width W2 of the second light-transmitting film layer 22 is set to be the largest to ensure the uniformity and brightness of the light emitted by the polarizing component on the light-emitting side. There is no light transmission requirement inside the first light-transmitting film layer 21, so its thickness can be minimized as much as possible to ensure the uniformity and brightness of the light emitted by the polarizing component on the light-emitting side.

[0075] refer to Figure 8 As shown, Figure 8 This is a cross-sectional view of another privacy-protecting functional layer provided in an embodiment of this application. In this method, the light-transmitting layer 122 between two adjacent barriers is made of a single refractive index material. Figure 8The dashed arrows in the middle indicate the direction of light transmission. In this method, light rays incident from one side of the light-transmitting layer 122 can exit from the other side of the light-transmitting layer 122 if the incident angle is small, and will be incident on the surface of the barrier wall 121 if the incident angle is large, and will be absorbed by the barrier wall 121. Figure 8 The polarizing component shown is a louver structure. By setting the design parameters of the barrier wall and the light-transmitting layer 122 in the polarizing component, light incident from the side of the light-transmitting layer 122 can pass through the privacy function layer 12 if the incident angle is less than the set angle, and light incident at an angle greater than or equal to the set angle can be absorbed by the barrier wall 121. This achieves control over the exit angle of the transmitted light from the polarizing component, giving the polarizing component a privacy function.

[0076] It should be noted that in this embodiment, the barrier 121 and the light-transmitting layer 122 have the same height and their surfaces are flush. This facilitates the bonding and fixing of the polarizing component to other structures.

[0077] like Figure 8 In the illustrated configuration, the first vertical projection can be a straight line segment or a non-straight line segment. The height of all retaining walls 121 is set to H; in the first direction F1, the average spacing between retaining walls 121 is W0, and the average width of retaining walls 121 is D; where H / P ≥ 1:1; P = W0 + D. Setting H / P ≥ 1:1 provides a better anti-peeping effect. Preferably, H / P ≥ 3:1 is set. Figure 8 As shown by the dashed line, light incident on the light-transmitting layer 122 can pass through the light-transmitting layer 122 when the incident angle is less than e. If the incident angle is not less than e, it will be incident on the surface of the barrier 121 and absorbed by the barrier 121. H / P is negatively correlated with e. The smaller the H / P, the larger the e. Setting H / P ≥ 3:1 can avoid e being too large and affecting the privacy protection effect.

[0078] In this embodiment, W0 / P is set to ≥60%, and the value of W0 is in the range of 10μm to 100μm to achieve a better anti-spy effect.

[0079] refer to Figure 9 As shown, Figure 9 This is a partial cross-sectional view of another polarizing component provided in an embodiment of this application, based on any of the above-described embodiments. Figure 9 The polarization ratio component shown also includes an antireflection film 13, with the polarization film layer 11 and the privacy protection layer 12 located on the same side of the antireflection film 13.

[0080] exist Figure 9 The illustration is provided with an example of the privacy protection layer 12 being located between the polarizing film layer 11 and the anti-reflection film 13.

[0081] refer to Figure 10 As shown, Figure 10This is a partial cross-sectional view of another polarizing component provided in an embodiment of this application, in which the polarizing film layer 11 is located between the privacy protection layer 12 and the anti-reflection film 13.

[0082] Regarding the light incident on the polarizing component, not only is large-angle incident light absorbed by the barrier 121 for privacy purposes, but also, due to the certain absorption ratio of the light-transmitting layer 12 material, the polarizing component absorbs a certain proportion of small-angle incident light that can pass through it, affecting the display brightness of the display device. In this embodiment, by adding an anti-reflection film 13 to the polarizing component, the transmittance of small-angle incident light can be guaranteed, thereby improving the display brightness of the display device.

[0083] The antireflective coating 13 is an advanced polarizer film (APF), which effectively improves the brightness of the polarizing assembly. By incorporating an APF into the polarizing assembly, the absorptive polarizer (polarizing film layer 11), the privacy protection film layer 12, and the APF can be integrated into one unit. This achieves privacy protection while simultaneously increasing the APF's gain on light output, resulting in high brightness. Furthermore, as described above, the moiré pattern problem can be avoided by randomly distributing the pattern structure of the privacy protection layer 12.

[0084] In this embodiment, the antireflective coating 13 is located on the light-incident side of the privacy protection layer 12. When the antireflective coating 13 is an APF (Advanced Persistent Light), it can transmit P-light and reflect S-light. When the S-light reflected by the antireflective coating 13 is reflected again by other structures below the polarizing component to the polarizing component, the S-light is converted into P-light and emitted from the polarizing component, thereby improving light transmittance and increasing display brightness. By positioning the antireflective coating 13 on the light-incident side of the privacy protection layer 12, the S-light reflected by the antireflective coating 13 can be prevented from passing through the privacy protection layer 12 multiple times and being absorbed by the privacy protection layer 12 multiple times, thus avoiding the problem of reduced display brightness caused by this. The P-light and S-light are linearly polarized light with perpendicular polarization directions.

[0085] The polarizing film layer 11 is generally made of organic materials, such as polyvinyl alcohol (PVA) film. To prevent the organic material from being corroded by moisture, in Figure 9 Or Figure 10 Based on the method shown, the polarizing component provided in the embodiments of this application can also be as follows: Figures 11-13 As shown, a first protective layer 31 and a second protective layer 32 are respectively disposed on opposite sides of the polarizing film layer 11. Both the first protective layer 31 and the second protective layer 32 are triacetate cellulose films (TAC).

[0086] refer to Figure 11 As shown, Figure 11This is a schematic diagram of a polarizing assembly provided in an embodiment of this application, wherein an antireflective film 13, a second protective layer 32, a privacy protection layer 12, a polarizing film layer 11, and a first protective layer 31 are sequentially stacked. An adhesive layer 33 is provided on the surface of the first protective layer 31 facing away from the polarizing film layer 11.

[0087] refer to Figure 12 As shown, Figure 12 This is a schematic diagram of another polarizing component provided in an embodiment of this application, wherein the antireflective film 13, the second protective layer 32, the polarizing film layer 11, the first protective layer 31, and the privacy protection layer 12 are stacked sequentially. An adhesive layer 33 is provided on the surface of the privacy protection layer 12 facing away from the first protective layer 31.

[0088] refer to Figure 13 As shown, Figure 13 This is a schematic diagram of another polarizing component provided in an embodiment of this application, wherein an antireflection film 13, a second protective layer 32, a polarizing film layer 11, a privacy protection layer 12, and a first protective layer 31 are sequentially stacked. An adhesive layer 33 is provided on the surface of the first protective layer 31 facing away from the privacy protection layer 12.

[0089] refer to Figure 14 As shown, Figure 14 This is a schematic diagram of another polarizing component provided in an embodiment of this application, wherein an anti-reflection film 13, a privacy protection layer 12, a second protective layer 32, a polarizing film layer 11, and a first protective layer 31 are sequentially stacked. An adhesive layer 33 is provided on the surface of the privacy protection layer 12 facing away from the first protective layer 31.

[0090] exist Figures 11-12 In the illustrated configuration, adhesive layer 33 is used for bonding and fixing the polarizing component to other structures in the display device. Adhesive layer 33 can be a pressure-sensitive adhesive (PSA). PSA is sensitive to pressure and does not require solvents or other auxiliary means; it can achieve bonding and fixing to other structures based on pressure alone.

[0091] refer to Figure 15 As shown, Figure 15 This is a partial structural schematic diagram of another polarizing component provided in an embodiment of this application, based on any of the above-mentioned real-time methods. Figure 15 The polarizing assembly shown has a light-diffusing sheet 14 on the light-emitting side of the privacy function layer 12 to improve the uniformity of the light emitted by the polarizing assembly.

[0092] On the light-emitting side of the polarizing module, since the barrier 121 is an opaque structure 12, the brightness of the area corresponding to the barrier 121 of the polarizing module is weak, which affects the uniformity of the brightness on the light-emitting side of the polarizing module. Figure 15In the method shown, by setting the light homogenizer 14, the light output uniformity of the polarizing component can be improved.

[0093] In one embodiment, the light-diffusing sheet 14 can be an adhesive layer mixed with scattering particles.

[0094] In another approach, the structure of the light homogenizer 14 can be as follows: Figure 16 As shown.

[0095] refer to Figure 16 As shown, Figure 16 This is a partial structural diagram of another polarizing component provided in an embodiment of this application. In this configuration, the light-diffusing sheet 14 includes a plurality of prisms 141 arranged one-to-one with the baffle 121. For the baffle 121 and the prisms 141 arranged opposite each other, the baffle 121 has a first vertical projection on the plane where the polarizing film layer 11 is located, and the prism 141 has a second vertical projection on the plane where the polarizing film layer 11 is located. The first vertical projection is located within the second vertical projection, and the first projection is located between the two opposite sides of the second projection in the first direction. In this way, the first vertical projection is located within the corresponding second vertical projection, and there is a gap between the edge of the first vertical projection and the edge of the second vertical projection. Since the prisms 141 can converge part of the light emitted from the light-transmitting layer 122 above the baffle 121, the brightness difference between the area of ​​the polarizing component corresponding to the light-transmitting layer 122 and the area corresponding to the baffle 121 is better reduced, and the brightness uniformity of the light emitted from different areas of the polarizing component is improved.

[0096] Based on the polarizing component provided in the above embodiments, another embodiment of this application also provides a display device, which includes the polarizing component provided in the above embodiments and can realize privacy display based on the polarizing component.

[0097] refer to Figure 17 As shown, Figure 17 This application provides a schematic diagram of the structure of a display device, which includes:

[0098] Backlight module 41;

[0099] The liquid crystal display module 42 is located on the light-emitting side of the backlight module 41;

[0100] An optical panel 43 is located between the backlight module 41 and the liquid crystal display module 42. The optical panel 43 can adjust the direction of light transmission based on a control signal.

[0101] The polarizing component 44 is located between the optical panel 43 and the backlight module 41.

[0102] In this embodiment, the liquid crystal display module 42 includes a liquid crystal cell and a first polarizer and a second polarizer located on opposite sides of the liquid crystal panel. The first polarizer may be located on the surface of the liquid crystal panel facing away from the optical panel 43, and the second polarizer may be located on the surface of the liquid crystal panel facing the optical panel 43.

[0103] exist Figure 17 The display device shown can use the polarizing component 44 provided in any of the above embodiments to achieve the privacy display function.

[0104] The optical panel 43 can be a liquid crystal grating, capable of adjusting the direction of light transmission based on a control signal. Depending on the input control signal, the optical panel 43 can maintain the transmission direction of the incident light or deflect the incident light. Thus, the display device of this embodiment can have a privacy mode and a non-privacy mode.

[0105] In privacy mode, the optical panel 43 does not change the transmission direction of the incident light. At this time, after the light passes through the polarizing component 44 and enters the optical panel 43, the optical panel 43 does not change the transmission direction of the incident light. The final emitted light from the display device is controlled by the polarizing component 44 to achieve privacy display.

[0106] In non-peeping mode, the optical panel 43 deflects the transmission direction of incident light based on a control signal. When light passing through the polarizing component 44 enters the optical panel 43, the optical panel 43, based on the control signal, deflects the transmission direction of the incident light, thus achieving non-peeping display. The optical panel 43 includes a liquid crystal layer, and the scattering performance of the liquid crystal layer in the optical panel 43 can be adjusted based on the control signal to switch between peeping mode and non-peeping mode. For example, the haze of the liquid crystal layer in the optical panel 43 can be adjusted. When no power is applied, the liquid crystal material is in a disordered, high-haze state with high scattering ability, and the light emitted from the polarizing component 44 will be scattered, thus achieving non-peeping display. When power is applied, the liquid crystal material is in an ordered, low-haze state with lower scattering ability, which can better maintain the emission direction of the polarizing component 44, thus achieving peeping display.

[0107] In the display device provided in the embodiments of this application, users can choose to be in privacy mode or non-privacy mode based on their usage needs, which is convenient for users.

[0108] Furthermore, as described in the above embodiments, the polarizing assembly 44 can be configured with a privacy protection layer 12 and a brightness enhancement film 13, with the brightness enhancement film 13 located on the side of the privacy protection layer 12 facing the backlight module 41. As described above, when the anti-reflection film 13 is an APF (Advanced Persistent Light), it can transmit P-light and reflect S-light. When the S-light reflected by the anti-reflection film 13 is reflected again by the backlight module 41 to the polarizing assembly 44, the S-light is converted into P-light and emitted from the polarizing assembly 44, thereby increasing the light transmittance and increasing the display brightness. By positioning the anti-reflection film 13 on the light-incident side of the privacy protection layer 12, the S-light reflected by the anti-reflection film 13 can be prevented from passing through the privacy protection layer 12 multiple times and being absorbed by the privacy protection layer 12 multiple times, thus avoiding the problem of reduced display brightness caused by this.

[0109] As can be seen from the above description, the polarizing component 44 provided in this application embodiment can ensure the brightness gain of the APF while displaying a privacy screen, and effectively improve the moiré pattern problem.

[0110] The various embodiments in this application are described in a progressive, parallel, or combined manner. Each embodiment focuses on its differences from other embodiments, and similar or identical parts between embodiments can be referred to interchangeably. The implementation methods provided in this application can be combined with each other without contradiction.

[0111] It should be noted that, in the description of this application, the accompanying drawings and embodiments are illustrative rather than restrictive. The same reference numerals throughout the embodiments identify the same structures. Additionally, for ease of understanding and description, the thicknesses of some layers, films, panels, regions, etc., may be exaggerated in the drawings. It is also understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, the element may be directly on the other element or there may be intermediate elements. Furthermore, "on" means positioning an element on or below another element, but does not inherently mean positioning it above another element according to the direction of gravity.

[0112] The terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component positioned centrally in the middle.

[0113] It should also be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or apparatus comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or apparatus that includes the aforementioned element.

[0114] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A polarizing assembly, characterized by, include: Polarizing film; A privacy protection layer located on one side of the polarizing film layer; In the first direction, the privacy protection layer includes a plurality of sequentially arranged barriers; a light-transmitting layer is provided between adjacent barriers; the first direction is parallel to the plane containing the polarizing film layer. The extension direction of the retaining wall is the second direction; the second direction is parallel to the plane where the polarizing film layer is located; the angle between the second direction and the first direction is not less than 75° and not greater than 105°.

2. The polarizing assembly of claim 1, wherein, In the first direction, the light-transmitting layer between adjacent retaining walls includes: The light-transmitting film consists of two opposing first light-transmitting film layers and a second light-transmitting film layer located between the first light-transmitting film layers, wherein the refractive index of the first light-transmitting film layer is less than the refractive index of the second light-transmitting film layer.

3. The polarizing component according to claim 2, characterized in that, The refractive index of the first light-transmitting film layer is , and the refractive index of the second light-transmitting film layer is ; wherein .

4. The polarizing assembly of claim 2, wherein, In the first direction, the width of the first light-transmitting film layer is W1, the width of the second light-transmitting film layer is W2, and the width of the retaining wall is W3; Among them, W2 > W3 > W1.

5. The polarizing component according to claim 1, characterized in that, The barrier wall has a first vertical projection on the plane where the polarizing film layer is located, and the first vertical projection is a straight line segment extending along a second direction; the barrier walls are arranged at equal intervals in the first direction; the second direction is parallel to the plane where the polarizing film layer is located.

6. The polarizing component according to claim 1, characterized in that, The barrier wall has a first vertical projection on the plane where the polarizing film layer is located. The first vertical projection is a non-straight segment extending along a second direction; the second direction is parallel to the plane where the polarizing film layer is located.

7. The polarizing component according to claim 6, characterized in that, The maximum width between two adjacent retaining walls is Wmax, and the minimum width is Wmin, where Wmax-Wmin≤40%W0; Wherein, W0 is the average distance between two adjacent retaining walls, and the value of W ranges from 10 to 100 μm.

8. The polarizing component according to claim 6, characterized in that, The non-straight segment includes multiple first line segments that are connected to each other; Wherein, for the same first vertical projection, the angle between the first line segment and the second direction is no greater than 10°.

9. The polarizing component according to claim 6, characterized in that, The non-straight segment includes multiple first line segments that are connected to each other; Wherein, for the same first vertical projection, at least two of the first line segments have different lengths, and / or, at least two of the first line segments have different angles with the second direction.

10. The polarizing component according to claim 1, characterized in that, The light-transmitting layer between two adjacent retaining walls is made of a single refractive index material.

11. The polarizing component according to claim 10, characterized in that, The height of all retaining walls is H; In the first direction, the average spacing between the retaining walls is W0, and the average width of the retaining walls is D; Where H / P≥1:1; P=W0+D.

12. The polarizing component according to claim 1, characterized in that, Also includes: An anti-reflective coating, wherein the polarizing film layer and the privacy protection layer are located on the same side of the anti-reflective coating.

13. The polarizing component according to claim 1, characterized in that, The retaining wall is a rubber layer mixed with carbon powder.

14. A display device, characterized in that, Includes the polarizing component as described in any one of claims 1-13.

15. The display device according to claim 14, characterized in that, The display device includes: Backlight module; The liquid crystal display module is located on the light-emitting side of the backlight module; The optical panel located between the backlight module and the liquid crystal display module can adjust the direction of light transmission based on control signals; The polarizing component is located between the optical panel and the backlight module; the polarizing component has a privacy protection layer and a brightness enhancement film, and the brightness enhancement film is located on the side of the privacy protection layer facing the backlight module.

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