Dimming panel and display device

Abstract

The embodiment of the utility model provides a dimming panel and a display device, relates to the technical field of display, and is used for enabling the display device to have a good peep-proof display effect and a shared display effect at the same time. The dimming panel comprises a first alignment layer, a dimming liquid crystal layer and a second alignment layer. The first alignment layer is arranged on one side, in the thickness direction of the dimming panel, of the dimming liquid crystal layer, and the second alignment layer is arranged on the other side, in the thickness direction of the dimming panel, of the dimming liquid crystal layer. The alignment direction of the first alignment layer and the alignment direction of the second alignment layer are horizontal, and an acute included angle is formed between the alignment direction of the first alignment layer and the alignment direction of the second alignment layer. The dimming panel is used for adjusting the maximum emitting angle of light rays emitted by penetrating through the dimming panel.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a dimming panel and a display device. Background Art

[0002] With the popularity of mobile devices such as mobile computers, tablets and mobile phones, more and more people like to work and kill time on mobile devices in public places such as subways and high-speed railways. When using mobile devices in public places, due to the wide viewing angle and high-quality display of the display device of the mobile device, people other than the user can also clearly see the display screen of the display device, which may easily lead to the leakage of business secrets and personal privacy, resulting in losses. Utility Model Content

[0003] The purpose of the embodiments of the present disclosure is to provide a dimming panel and a display device, so as to enable the display device to have both good anti-peeping display effect and shared display effect.

[0004] To achieve the above objectives, the embodiments of the present disclosure provide the following technical solutions:

[0005] In one aspect, a dimming panel is provided. The dimming panel includes a first alignment layer, a dimming liquid crystal layer, and a second alignment layer. The first alignment layer is disposed on one side of the dimming liquid crystal layer along the thickness direction of the dimming panel, and the second alignment layer is disposed on the other side of the dimming liquid crystal layer along the thickness direction of the dimming panel. The alignment direction of the first alignment layer and the alignment direction of the second alignment layer are horizontal, and the alignment directions of the first alignment layer and the second alignment layer form an acute angle.

[0006] In the dimming panel, by forming an acute angle between the alignment directions of the first alignment layer and the second alignment layer, the light transmittance of the dimming panel in the shared display state can be improved, and the light transmittance of the dimming panel in the anti-peeping display state can be reduced.

[0007] In some embodiments, in some embodiments, an angle formed by the alignment direction of the first alignment layer and the alignment direction of the second alignment layer is greater than or equal to 75° and less than or equal to 85°.

[0008] In some embodiments, in some embodiments, an angle formed by the alignment direction of the first alignment layer and the alignment direction of the second alignment layer is greater than or equal to 70° and less than or equal to 80°.

[0009] In some embodiments, the vertical phase delay of the dimming panel is greater than or equal to 400 nm and less than or equal to 1200 nm.

[0010] In another aspect, a display device is provided. The display device includes a display panel and at least one dimming panel. The display panel is used to display an image, and the dimming panel is used to adjust the maximum emission angle of light emitted from the dimming panel, thereby adjusting the maximum emission angle of light emitted from the display device. The dimming panel is the dimming panel described in any of the above embodiments.

[0011] The display device includes a dimming panel that can be switched between a shared mode and an anti-peeping mode, thereby adjusting the maximum angle of light emitted from the dimming panel. When the dimming panel is in the shared mode, the maximum angle of light emitted from the dimming panel is large, resulting in a good shared display effect. When the dimming panel is in the anti-peeping mode, the maximum angle of light emitted from the dimming panel is small, resulting in a good anti-peeping display effect.

[0012] It has the same structure and beneficial technical effects as the dimming panels provided in some of the above embodiments, and will not be described in detail here.

[0013] In some embodiments, the display panel is an active light-emitting display panel, and the dimming panel is located on the light-emitting side of the display panel.

[0014] In some embodiments, the dimming panel includes a first dimming panel, and the display device further includes a first polarizer and a second polarizer. The first polarizer is arranged on the side of the first dimming panel facing away from the display panel, and the second polarizer is arranged between the first dimming panel and the display panel.

[0015] In some embodiments, the dimming panel further includes: a second dimming panel disposed between the first dimming panel and the display panel, a second polarizer disposed between the first dimming panel and the second dimming panel, and a third polarizer disposed between the second dimming panel and the display panel.

[0016] In some embodiments, the display panel is a non-active light-emitting display panel, and the display device further includes a backlight module.

[0017] In some embodiments, the dimming panel includes a first dimming panel, and the first dimming panel is disposed on a side of the display panel facing away from the backlight module, or is disposed between the display panel and the backlight module.

[0018] In some embodiments, the display device includes a first polarizer, a second polarizer, and a third polarizer. The first polarizer is arranged on the side of the structure composed of the display panel and the first dimming panel facing away from the backlight module, the second polarizer is arranged between the display panel and the first dimming panel, and the third polarizer is arranged on the side of the structure composed of the display panel and the first dimming panel close to the backlight module.

[0019] In some embodiments, the dimming panel further includes: a second dimming panel, which is disposed on a side of the display panel facing away from the backlight module, or between the display panel and the backlight module.

[0020] In some embodiments, the display device includes: a first polarizer, a second polarizer, a third polarizer and a fourth polarizer, the first polarizer is arranged on the side of the structure composed of the display panel, the first dimming panel and the second dimming panel facing away from the backlight module, the second polarizer and the third polarizer are respectively arranged between two adjacent structures of the display panel, the first dimming panel and the second dimming panel, and the fourth polarizer is arranged on the side of the structure composed of the display panel, the first dimming panel and the second dimming panel close to the backlight module.

[0021] In some embodiments, when the display device includes at least two dimming panels, angles formed by the alignment directions of the first alignment layers and the second alignment layers of the at least two dimming panels are the same or different.

[0022] In some embodiments, the polarization directions of the polarizers on both sides of the dimming panel are crossed.

[0023] In some embodiments, the angle formed by the polarization directions of the polarizers on both sides of the dimming panel is the same as the angle formed by the alignment directions of the first alignment layer and the second alignment layer of the dimming panel.

[0024] In some embodiments, the display device further includes: a half-wave plate disposed on one side of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] To more clearly illustrate the technical solutions of the present disclosure, the following briefly introduces the drawings required for use in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure, and those skilled in the art can also derive other drawings based on these drawings. Furthermore, the drawings described below are schematic diagrams and are not intended to limit the actual dimensions of the products, actual processes of the methods, actual timing of signals, and the like involved in the embodiments of the present disclosure.

[0026] Figure 1 is a cross-sectional structural diagram of a display device according to some embodiments;

[0027] Figure 2 is a cross-sectional structural diagram of a display device according to some other embodiments;

[0028] Figure 3 is a cross-sectional structural diagram of a display device according to some other embodiments;

[0029] Figure 4is a cross-sectional structural diagram of a display device according to some other embodiments;

[0030] Figure 5 is a cross-sectional structural diagram of a display device according to some other embodiments;

[0031] Figure 6 is a cross-sectional structural diagram of a display device according to some other embodiments;

[0032] Figure 7 is a cross-sectional structural diagram of a display device according to some other embodiments;

[0033] Figure 8 is a cross-sectional structural diagram of a display device according to some other embodiments;

[0034] Figure 9 is a cross-sectional structural diagram of a display device according to some other embodiments;

[0035] Figure 10 is a cross-sectional structural diagram of a display device according to some other embodiments;

[0036] Figure 11 is a cross-sectional structural diagram of a display device according to some other embodiments;

[0037] Figure 12 A curve diagram showing a change in transmittance in a set direction of a dimming panel with different RUB angles versus viewing angle;

[0038] Figure 13 for Figure 12 A partial enlarged view of

[0039] Figure 14 is a normalized curve diagram showing the variation of transmittance in a set direction with viewing angle for dimming panels with different RUB angles;

[0040] Figure 15 for Figure 14 A partial enlarged view of

[0041] Figure 16 It is a curve diagram of the change of transmittance of the dimming panel at different viewing angles as a function of RUB angle;

[0042] Figure 17 The normalized curve of the transmittance of the dimming panel at different viewing angles changes with the RUB angle;

[0043] Figure 18 This is a transmittance distribution diagram of the RUB 90° dimming panel in the shared state;

[0044] Figure 19 This is a transmittance distribution diagram of the RUB 80° dimming panel in the shared state;

[0045] Figure 20 This is a transmittance distribution diagram of the RUB 90° dimming panel in the anti-peep state;

[0046] Figure 21 This is a transmittance distribution diagram of the RUB 80° dimming panel in the anti-peep state;

[0047] Figure 22 is another variation curve of the transmittance in a set direction of a dimming panel with different RUB angles versus viewing angle;

[0048] Figure 23 Another variation curve of the transmittance of the dimming panel at different anti-peeping viewing angles versus RUB angle is shown;

[0049] Figure 24 Another transmittance distribution diagram of the RUB 90° dimming panel in the shared state;

[0050] Figure 25 Another transmittance distribution diagram of the RUB 80° dimming panel in the shared state;

[0051] Figure 26 This is another transmittance distribution diagram of the RUB 90° dimming panel in the anti-peep state;

[0052] Figure 27 This is another transmittance distribution diagram of the RUB 80° dimming panel in the anti-peep state;

[0053] Figure 28 A transmittance distribution diagram of two stacked RUB 90° dimming panels in the shared state;

[0054] Figure 29 A transmittance distribution diagram of two stacked RUB 80° dimming panels in a shared state;

[0055] Figure 30 This is a transmittance distribution diagram of two stacked RUB 90° dimming panels in anti-peep state;

[0056] Figure 31 This is a transmittance distribution diagram of two stacked RUB 80° dimming panels in anti-peep state. DETAILED DESCRIPTION

[0057] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0058] Unless the context requires otherwise, throughout the specification and claims, the term "including" is to be interpreted as having an open, inclusive meaning, that is, "including, but not limited to." In the description of the specification, the terms "one embodiment," "some embodiments," "exemplary embodiments," "examples," or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic associated with the embodiment or example is included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials, or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0059] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0060] When describing some embodiments, the expressions "coupled" and "connected" and their derivatives may be used. The term "connected" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. The term "coupled" indicates, for example, that two or more components are in direct physical or electrical contact. The term "coupled" or "communicatively coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0061] “At least one of A, B and C” has the same meaning as “at least one of A, B or C” and both include the following combinations of A, B and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B and C.

[0062] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0063] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0064] Additionally, the use of “based on” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0065] It will be understood that when a layer or element is referred to as being on another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may be present therebetween.

[0066] Exemplary embodiments are described herein with reference to cross-sectional and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of layers and the area of ​​regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are contemplated. Therefore, the exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include deviations in shape due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0067] like Figure 1 As shown, some embodiments of the present disclosure provide a display device 100. The display device 100 can be any device that displays any moving (e.g., video), fixed (e.g., still image), text, or image. More specifically, it is expected that the embodiments described can be implemented in or associated with a variety of electronic devices, including but not limited to mobile phones, handheld or portable computers, personal digital assistants (PDAs), personal information assistants (PIAs), televisions (TVs), or wearable devices.

[0068] The viewing angle of the display device 100 refers to the angle at which a user can clearly see all displayed contents on the display device 100 from different directions. The viewing angle of the display device 100 includes a horizontal viewing angle and a vertical viewing angle.

[0069] Taking the direction perpendicular to the display surface of the display device 100 as the reference direction, the display content on the display device 100 can still be clearly seen at a certain angle to the left or right of the reference direction, and the range of this angle is the horizontal viewing angle of the display device 100; the display content on the display device 100 can still be clearly seen at a certain angle above or below the reference direction, and the range of this angle is the vertical viewing angle of the display device 100.

[0070] like Figure 1 and Figure 2 As shown, taking the first direction X as the horizontal direction and the second direction Y as the vertical direction as an example, the maximum angle formed by the direction of the outgoing light in the left and right directions of the display device 100 and the reference direction is θ, the horizontal viewing angle of the display device 100 is 2θ, θ≤90°, and the horizontal viewing angle of the display device 100 is less than or equal to 180°. Correspondingly, the maximum angle formed by the direction of the outgoing light in the up and down directions of the display device 100 and the reference direction is the vertical viewing angle of the display device 100, and the vertical viewing angle of the display device 100 is less than or equal to 180°.

[0071] like Figure 1 and Figure 2 As shown, the area on one side of the display surface of the display device 100 defined by the viewing angle (horizontal viewing angle and vertical viewing angle) of the display device 100 is the first viewing zone S1. When the horizontal viewing angle of the display device 100 is less than 90°, the area on one side of the display surface of the display device 100 and located on both sides of the first viewing zone S1 along the first direction X is the second viewing zone S2. When the vertical viewing angle of the display device 100 is less than 90°, the area on one side of the display surface of the display device 100 and located on both sides of the first viewing zone S1 along the second direction Y is the third viewing zone S3.

[0072] The display image of the display device 100 can be clearly seen in the first viewing area S1, the display content of the display device 100 cannot be seen or cannot be clearly seen in the second viewing area S2, and the display content of the display device 100 cannot be seen or cannot be clearly seen in the third viewing area S3.

[0073] The second viewing zone S2 may refer to the two sides of the display device 100 in the left-right direction, which are the left and right viewing angles of the display device 100. Correspondingly, the third viewing zone S3 refers to the two sides of the display device 100 in the up-down direction, which are the top and bottom viewing angles of the display device 100. The second viewing zone S2 and the third viewing zone S3 are not limited to the left and right sides and the top and bottom sides of the display device 100, and may also correspond to other directions, which is not limited in this disclosure.

[0074] The larger the first viewing area S1 is, the better the shared display effect of the display device 100 is. At the same time, the possibility of accidental leakage of the display content of the display device 100 is also higher.

[0075] Based on this, the present disclosure provides a display device 100 .

[0076] In some embodiments, as Figure 2 and Figure 5 As shown, the display device 100 includes a display panel 20 and at least one dimming panel 10. The display panel 20 is used to display an image to be displayed, and the dimming panel 10 is used to adjust the maximum emission angle of light emitted through the dimming panel 10.

[0077] The larger the maximum emission angle of the light emitted by the display device 100, the larger the viewing angle of the display device 100, the larger the range of the first viewing area S1, and the display device 100 displays content in a shared display state; the smaller the maximum emission angle of the light emitted by the display device 100, the smaller the viewing angle of the display device 100, the smaller the range of the first viewing area S1, and the display device 100 displays content in an anti-peeping display state.

[0078] By setting up the dimming panel 10, the dimming panel 10 can switch between a shared state and an anti-peeping state, thereby adjusting the maximum exit angle of the light emitted through the dimming panel 10, so as to adjust the maximum exit angle of the light emitted by the display device 100, so that the display device 100 can switch between a shared display state and an anti-peeping display state, making the display device 100 suitable for more application scenarios.

[0079] When the display device 100 is in a shared display state (the dimming panel 10 is in a shared state), the range of the first viewing area S1 is larger, and the range of the anti-peeping display area (the second viewing area S2 and the third viewing area S3) is smaller, so that multiple people can clearly see the display content of the display device 100 from different directions at the same time, thereby achieving better shared display.

[0080] When the display device 100 is in the anti-peeping display state (i.e., the dimming panel 10 is in the anti-peeping state), the range of the first viewing area S1 is smaller, and the range of the anti-peeping display area is larger. The anti-peeping display area of ​​the display device 100 is larger, which can effectively prevent the display content of the display device 100 from being accidentally leaked and ensure privacy and security.

[0081] In the display device 100, for the same dimming panel 10, the maximum emission angle of the incident light of the dimming panel 10 in the set direction is a, and the maximum emission angle of the outgoing light of the dimming panel 10 in the set direction is b; the dimming panel 10 can switch between a shared state and an anti-peeping state. When the dimming panel 10 is in the shared state, the maximum emission angle of the light in any direction after passing through the dimming panel 10 remains unchanged, or the change is not obvious; when the dimming panel 10 is in the anti-peeping state, the maximum emission angle of the light in at least one set direction after passing through the dimming panel 10 can be changed compared with before passing through the dimming panel 10.

[0082] The incident light mentioned here refers to the light emitted to the same dimming panel 10, the emitted light refers to the light emitted through this dimming panel 10, and a and b refer to the maximum emission angles of the light in the same direction (set direction) before and after passing through the dimming panel 10.

[0083] When the dimming panel 10 is in a shared state, a and b are the same or approximately the same, the dimming panel 10 has good light transmittance, and the maximum emission angle of the outgoing light of the display device 100 with the dimming panel 10 is the same or approximately the same as the maximum emission angle of the outgoing light of the display device 100 without the dimming panel 10, and the display device 100 has a good shared display effect.

[0084] When the dimming panel 10 is in the anti-peeping state, the maximum emission angle of the light in the same direction (set direction) before and after passing through the dimming panel 10 is a greater than b. The difference between a and b can represent the dimming panel 10's ability to converge the maximum emission angle of the light in the set direction, c=ab. The larger the value of c, the more the range of the emission angle of the light in the set direction converges after passing through the dimming panel 10, the more the range of the visible angle of the display device 100 in the set direction converges, and the better the anti-peeping display effect of the display device 100 in the set direction.

[0085] By switching the dimming panel 10 between the shared state and the anti-peeping state, the maximum exit angle of the light emitted through the dimming panel 10 can be adjusted, thereby adjusting the maximum exit angle of the light emitted by the display device 100, so that the display device 100 can be switched between the shared display state and the anti-peeping display state.

[0086] The display device 100 may include one dimming panel 10, or may include multiple (two or more) dimming panels 10. When the display device 100 includes multiple dimming panels 10, each of the multiple dimming panels 10 may adjust the maximum emission angle of light in the same set direction, or may adjust the maximum emission angle of light in different set directions.

[0087] Based on this, the angles formed by the alignment directions of the first alignment layers 12 and the second alignment layers 13 of the multiple dimming panels 10 can be the same or different. For example, the display device 100 includes two RUB 80° dimming panels 10, or includes one RUB 80° dimming panel 10 and one RUB 75° dimming panel 10, or includes two RUB 80° dimming panels 10 and one RUB 70° dimming panel 10. Of course, the RUB angles used by the dimming panels 10 are not limited to these, and the RUB angle combinations of the multiple dimming panels 10 are also not limited to these. The specific combinations herein are illustrative of the present disclosure and do not constitute limitations on the present disclosure.

[0088] In other embodiments, a privacy film is provided on the light-emitting side of the display device 100 to achieve privacy-protected display. In this case, the maximum angle of light emitted through the privacy film is smaller than the maximum angle of light emitted toward the privacy film. The privacy film converges the emitted light, thereby converging the viewing angle of the display device and reducing the range of the first viewing area S1 to within a set range. However, in this case, the viewing angle of the display device is fixed and cannot be changed. Therefore, the display device can only display content in the privacy-protected display state and cannot achieve shared display.

[0089] The display device 100 provided by some embodiments of the present disclosure switches the dimming panel 10 between a shared state and an anti-peeping state, thereby switching the display device 100 between a shared display state and an anti-peeping display state. Compared with the solution of setting an anti-peeping film to achieve viewing angle adjustment, it can not only achieve anti-peeping display but also achieve shared display, making the display device 100 suitable for more application scenarios.

[0090] In some embodiments, the dimming panel 10 is a liquid crystal dimming panel, such as Figure 2 As shown, the dimming panel 10 includes a dimming liquid crystal layer 11 .

[0091] When the display state of the display device 100 is the shared display state, the dimming liquid crystal layer 11 of the dimming panel 10 is in a shared state, and the liquid crystal molecules in the dimming liquid crystal layer 11 are arranged horizontally (the long axis of the liquid crystal molecules is parallel to the plane where the display surface of the display panel is located). The light transmittance of the dimming liquid crystal layer 11 is high, and the range of the first viewing area S1 is large. The display content of the display device 100 can be clearly seen from a large range on one side of the display surface of the display device 100.

[0092] When the display state of the display device 100 is the anti-peeping display state, the dimming liquid crystal layer 11 of the dimming panel 10 is in the anti-peeping state. When viewed from the visual angle range (first viewing area S1), the liquid crystal molecules are arranged horizontally, the light transmittance of the dimming liquid crystal layer 11 is high, and the display content of the display device 100 can be clearly seen; when viewed from the anti-peeping angle range (second viewing area S2 and / or third viewing area S3), the liquid crystal molecules are arranged vertically or tilted, the light transmittance of the dimming liquid crystal layer 11 is low, at least part of the light is blocked, the light-emitting side of the dimming panel 10 appears black or dark, and the display screen of the display device 100 cannot be seen or cannot be seen clearly.

[0093] When the horizontal viewing angle of the display device 100 is 90°, the display device 100 does not have a second viewing area S2; when the vertical viewing angle of the display device 100 is 90°, the display device 100 does not have a third viewing area S3. Furthermore, the dimming panel 10 can adjust the maximum angle of light emitted from the dimming panel 10 in a set direction. The set direction includes but is not limited to the first direction X and / or the second direction Y, or any other direction.

[0094] A single dimming panel 10 may adjust the maximum emission angle of light emitted through the dimming panel 10 in a single direction. For example, the single dimming panel 10 may only adjust the maximum emission angle of light emitted through the dimming panel 10 in a first direction X, or the single dimming panel 10 may only adjust the maximum emission angle of light emitted through the dimming panel 10 in a second direction Y.

[0095] The dimming panel 10 can also adjust the maximum emission angle of light emitted from the dimming panel 10 in multiple directions. For example, a single dimming panel 10 can adjust the maximum emission angle of light emitted from the dimming panel 10 in a first direction X while also adjusting the maximum emission angle of light emitted from the dimming panel 10 in a second direction Y.

[0096] Taking the setting direction as the first direction X or the second direction Y as an example, the dimming panel 10 can converge the outgoing light of the display device 100 in the horizontal direction or converge the outgoing light of the display device 100 in the vertical direction in the anti-peeping state. The anti-peeping angle range of the display device 100 includes the second viewing area S2 or the third viewing area S3.

[0097] The dimming panel 10 is used to adjust the range of the emission angle of the light emitted by the display device 100. Therefore, the dimming panel 10 should be arranged on the light-emitting side of the light source in the display device 100. In the case where the display panel 20 is an actively luminous display panel, the display panel 20 can display self-luminescence. The display panel 20 is the light source in the display device 100. All the dimming panels 10 in the display device 100 are located on the light-emitting side of the display panel 20. In the case where the display panel 20 is a non-actively luminous display panel, the display device 100 also includes a backlight module 30. The backlight module 30 is the light source in the display device 100. The display panel 20 and all the dimming panels 10 in the display device 100 are located on the light-emitting side of the backlight module 30. The positions of the display panel 20 and the dimming panel 10 can be adjusted as needed.

[0098] The following describes the configuration of the dimming panel 10 and the display panel 20 in the display device 100 of some embodiments of the present disclosure, taking the display panel 20 as an active light-emitting display panel as an example.

[0099] In some embodiments, as Figure 2 As shown, the display device 100 may include a dimming panel 10, for example Figure 2 The first dimming panel 10 a shown in FIG. 1 is disposed on the light-emitting side of the display panel 20 .

[0100] For example, Figure 2 As shown, the display panel 20 includes a backplane 20a and a light-emitting structure layer 20b disposed on the backplane 20a. The light-emitting structure layer 20b includes a plurality of light-emitting devices, including but not limited to OLED (Organic Light-Emitting Diode), MLED (Mini Light-Emitting Diode, or Micro Light-Emitting Diode), etc.

[0101] Along the thickness direction of the display device 100 , the light emitting structure layer 20 b includes a plurality of light emitting devices located within the dimming liquid crystal layer 11 . Light emitted by the light emitting devices can pass through the dimming liquid crystal layer 11 and be emitted.

[0102] When the dimming panel 10 is in the shared state, the light emitted by the display panel 20 passes through the dimming panel 10 and is emitted. The maximum emission angle of the light emitted through the dimming panel 10 is large, and the viewing angle of the display device 100 is large, which can achieve a good shared display effect; when the dimming panel 10 is in the anti-peeping state, the light emitted by the display panel 20 is converged after passing through the dimming panel 10. The maximum emission angle of the light emitted through the dimming panel 10 is small, and the viewing angle of the display device 100 is small, which can achieve a good anti-peeping display effect.

[0103] Based on this, in some embodiments, such as Figure 2 As shown, the display device 100 further includes a first polarizer P1 and a second polarizer P2 . The first polarizer P1 is disposed on the side of the first dimming panel 10 a facing away from the display panel 20 , and the second polarizer P2 is disposed between the dimming panel 10 and the display panel 20 .

[0104] By providing a first polarizer P1 and a second polarizer P2 on either side of the first dimming panel 10a, respectively, the dimming panel 10 can be protected. Furthermore, by providing the polarizers, the polarization direction of light passing through the polarizers can be adjusted, reducing light scattering and reflection, making the display content of the display device 100 clearer and with higher contrast, thereby improving the display quality.

[0105] In other embodiments, Figure 3 As shown, the display device 100 includes two dimming panels 10, for example Figure 3 1 and 2. The first dimming panel 10a and the second dimming panel 10b are shown in FIG. 2 , and the second dimming panel 10b is disposed between the first dimming panel 10a and the display panel 20.

[0106] For example, when the display device 100 includes two dimming panels 10 , the angles formed by the alignment directions of the first alignment layers 12 and the second alignment layers 13 of the two dimming panels 10 may be the same or different.

[0107] The first dimming panel 10a can converge the emission angle of light in a first set direction passing through the first dimming panel 10a in the anti-peep state, and the second dimming panel 10b can converge the emission angle of light in a second set direction passing through the second dimming panel 10b in the anti-peep state.

[0108] As mentioned above, the dimming panel 10 can adjust the maximum emission angle of the light passing through the dimming panel 10 in a set direction. The set direction is not limited to one direction, but can also be multiple different directions. Therefore, the first dimming panel 10a and the second dimming panel 10b can adjust the maximum light emission angle in a single direction, or adjust the maximum emission angle in multiple directions.

[0109] In the case that the first set direction and the second set direction are both limited to one specific direction, the first set direction and the second set direction may be parallel to or intersecting with each other.

[0110] When the first set direction and the second set direction are parallel, when the display device 100 is in the anti-peeping display state, the first dimming panel 10a and the second dimming panel 10b can converge the emitted light twice in the set direction. Compared with only setting one dimming panel 10, the viewing angle of the display device 100 in the set direction is further narrowed, and the anti-peeping function of the display device 100 in the set direction can be better achieved.

[0111] When the first set direction intersects the second set direction, when the display device 100 is in the anti-peeping display state, the first dimming panel 10a and the second dimming panel 10b can respectively converge the outgoing light in the first set direction and the second set direction. Compared with only setting one dimming panel 10, the viewing angle of the display device 100 in multiple directions can be narrowed, so that the display device 100 can achieve anti-peeping in multiple directions.

[0112] Based on this, Figure 3 As shown, the display device 100 also includes a first polarizer P1, a second polarizer P2 and a third polarizer P3. The first polarizer P1 is arranged on the side of the first dimming panel 10a facing away from the display panel 20, the second polarizer P2 is arranged between the first dimming panel 10a and the second dimming panel 10b, and the third polarizer P3 is arranged between the second dimming panel 10b and the display panel 20.

[0113] Polarizers need to be provided on both sides of the first dimming panel 10a, and polarizers need to be provided on both sides of the second dimming panel 10b. In this embodiment, by reusing the second polarizer P2 as the polarizer of the first dimming panel 10a and the second dimming panel 10b, compared with the design of separately configuring two polarizers for each dimming panel 10, the number of polarizers in the display device 100 is reduced, thereby reducing the thickness of the display device 100 and reducing the cost of the display device 100.

[0114] The following describes the configuration of the dimming panel 10 and the display panel 20 in the display device 100 of some embodiments of the present disclosure, taking the display panel 20 as a non-active light-emitting display panel as an example.

[0115] In some embodiments, the display device 100 may include a dimming panel 10, for example Figure 4 and Figure 5 The first dimming panel 10a shown in FIG. Figure 4 As shown, the first dimming panel 10a is disposed on the side of the display panel 20 facing away from the backlight module 30; or Figure 5 As shown, the first dimming panel 10 a is disposed between the display panel 20 and the backlight module 30 .

[0116] The relative positions of the display panel 20 and the first dimming panel 10a along the thickness direction of the display device 100 can be set as needed, and this disclosure does not limit this. If either the first dimming panel 10a or the display panel 20 is closer to the backlight module 30, the display device 100 can achieve good shared display and anti-peeping display effects.

[0117] Based on this, in some embodiments, such as Figure 4 and Figure 5 As shown, the display device 100 also includes a first polarizer P1, a second polarizer P2 and a third polarizer P3. The first polarizer P1 is arranged on the side of the structure composed of the display panel 20 and the first dimming panel 10a facing away from the backlight module 30, the second polarizer P2 is arranged between the display panel 20 and the first dimming panel 10a, and the third polarizer P3 is arranged on the side of the structure composed of the display panel 20 and the first dimming panel 10a close to the backlight module 30.

[0118] Similar to the previous embodiment, in this embodiment, the provision of polarizers can protect the dimming panel 10 and the display panel 20, while also reducing light scattering and reflection, thereby improving the display effect of the display device 100. The second polarizer P2 is reused as the polarizer for the first dimming panel 10a and the display panel 20, thereby reducing the cost and thickness of the display device 100.

[0119] In some other embodiments, the display device 100 includes two dimming panels 10, for example, Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 and Figure 11 The first dimming panel 10a and the second dimming panel 10b are shown in FIG.

[0120] like Figure 6 、 Figure 7 and Figure 8 As shown, the second dimming panel 10b is disposed on the side of the display panel 20 facing away from the backlight module 30. Figure 9 、 Figure 10 and Figure 11 As shown, the second dimming panel 10 b is disposed between the display panel 20 and the backlight module 30 .

[0121] Based on this, in some embodiments, such as Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 and Figure 11The display device 100 also includes a first polarizer P1, a second polarizer P2, a third polarizer P3 and a fourth polarizer P4. The first polarizer P1 is arranged on the side of the structure composed of the display panel 20, the first dimming panel 10a and the second dimming panel 10b facing away from the backlight module 30. The second polarizer P2 and the third polarizer P3 are respectively arranged between two adjacent structures of the display panel 20, the first dimming panel 10a and the second dimming panel 10b. The fourth polarizer P4 is arranged on the side of the structure composed of the display panel 20, the first dimming panel 10a and the second dimming panel 10b close to the backlight module 30.

[0122] The second polarizer P2 and the third polarizer P3 are reused as polarizers of two adjacent ones of the display panel 20 , the first dimming panel 10 a , and the second dimming panel 10 b , which helps to reduce the cost and thickness of the display device 100 .

[0123] In some embodiments, as Figure 11 As shown, the display device 100 further includes at least one connection layer 40 , which is disposed between two adjacent structures among the display panel 20 , the first dimming panel 10 a , and the second dimming panel 10 b .

[0124] For example, Figure 11 As shown, the second polarizer P2 is located between the display panel 20 and the second dimming panel 10b, and the connecting layer 40 between the display panel 20 and the second dimming panel 10b can be located between the display panel 20 and the second polarizer P2, or between the second polarizer P2 and the second dimming panel 10b.

[0125] The third polarizer P3 is located between the first dimming panel 10a and the second dimming panel 10b. The connecting layer 40 of the first dimming panel 10a and the second dimming panel 10b can be located between the first dimming panel 10a and the third polarizer P3, or between the second dimming panel 10b and the third polarizer P3.

[0126] Exemplarily, the material of the connection layer 40 is a light-transmitting material with adhesive strength, and the light transmittance of the connection layer 40 is greater than or equal to 90%.

[0127] The connection layer 40 may be a double-sided adhesive tape without a base material. The material of the connection layer 40 includes but is not limited to optical clarity adhesive (OCA).

[0128] The OCA material can be cured at room temperature and has a small curing shrinkage. The display panel 20 and the dimming panel 10 can be quickly connected and assembled through the connection layer 40 .

[0129] The specific structure of the dimming panel 10 according to some embodiments of the present disclosure is introduced below.

[0130] In some embodiments, as Figure 11 As shown, the dimming panel 10 includes a first alignment layer 12, a dimming liquid crystal layer 11, and a second alignment layer 13. The first alignment layer 12 is disposed on one side of the dimming liquid crystal layer 11 along the thickness direction of the dimming panel 10, and the second alignment layer 13 is disposed on the other side of the dimming liquid crystal layer 11 along the thickness direction of the dimming panel 10.

[0131] According to the birefringence characteristics of liquid crystal molecules, when the vibration direction of the light incident on the liquid crystal molecules is parallel to the direction of the long axis of the liquid crystal molecules, the incident light will still be linearly polarized light polarized along the long axis of the liquid crystal molecules after passing through the liquid crystal molecules and will continue to propagate in this state.

[0132] When the vibration direction of the light incident on the liquid crystal molecules forms an angle with the direction of the long axis of the liquid crystal molecules, the incident light is decomposed into a first refracted light and a second refracted light whose vibration directions are perpendicular to each other. The first refracted light and the second refracted light are both linearly polarized lights, and the polarization directions of the first refracted light and the second refracted light are perpendicular to the long axis direction of the liquid crystal molecules. The first refracted light and the second refracted light produce a phase difference at the moment they pass through the liquid crystal molecules. After the first refracted light and the second refracted light are recombined, they form elliptically polarized light and continue to propagate while maintaining this state.

[0133] By applying electric fields of different intensities to the dimming liquid crystal layer 11 of the dimming panel 10, the degree of distortion of the liquid crystal molecules in the dimming liquid crystal layer 11 can be controlled, and the arrangement of the liquid crystal molecules in the dimming liquid crystal layer 11 can be changed, thereby reducing the light transmittance of the dimming panel 10 in a set direction and changing the maximum emission angle of the light emitted through the dimming panel 10, thereby achieving privacy protection for the display device 100 in a set direction.

[0134] The dimming panel 10 can use the TN display mode or other display modes. When the dimming panel 10 uses the TN display mode, the alignment direction of the first alignment layer 12 and the alignment direction of the second alignment layer 13 can be horizontal. The angle formed by the alignment direction of the first alignment layer 12 and the alignment direction of the second alignment layer 13 on the dimming panel 10 is hereinafter referred to as the RUB angle.

[0135] In some embodiments, the alignment direction of the first alignment layer 12 of the dimming panel 10 is perpendicular to the alignment direction of the second alignment layer 13. In this case, the alignment angle of the dimming panel 10 is RUB 90°.

[0136] In this case, when the viewing angle of the display device is adjusted by the liquid crystal dimming panel to achieve anti-peeping display, the viewing angle of the display device is still large, and the anti-peeping effect cannot achieve the expected effect.

[0137] Based on this, in other embodiments, the display device includes a dimming panel 10 and an anti-privacy film. The alignment direction of the first alignment layer 12 of the dimming panel 10 is perpendicular to the alignment direction of the second alignment layer 13. The configuration of the anti-privacy film is described above and will not be further described here. In this way, when the dimming panel 10 has an alignment angle of RUB 90°, the display device can switch between a shared display state and an anti-privacy display state through the combined action of the anti-privacy film and the dimming panel 10, making it suitable for a wider range of application scenarios.

[0138] Compared to a solution that adjusts the viewing angle solely through the dimming panel 10, the combined effect of the privacy film and the dimming panel 10 allows the display device 100 to switch between a shared display state and an anti-privacy display state while also improving the anti-privacy display performance of the display device 100. However, the privacy film increases the cost of the display device and reduces the transmittance of the display device 100, preventing the display device 100 from achieving the same display performance in the shared display state as a display device 100 without the privacy film. Furthermore, at the same display brightness, the display device 100 equipped with the privacy film consumes more power.

[0139] Based on this, in some other embodiments of the present disclosure, the alignment direction of the first alignment layer 12 and the alignment direction of the second alignment layer 13 of the dimming panel 10 form an acute angle.

[0140] The acute angle mentioned here means that the alignment direction of the first alignment layer 12 and the alignment direction of the second alignment layer 13 intersect and are not perpendicular to each other.

[0141] For example, the angle formed by the alignment direction of the first alignment layer 12 and the alignment direction of the second alignment layer 13 is greater than or equal to 70° and less than or equal to 85°.

[0142] Taking the angle formed by the alignment direction of the first alignment layer 12 and the alignment direction of the second alignment layer 13 as 80° as an example, the alignment angle of the dimming panel 10 is RUB 80°, which is 10° different from the scheme with the alignment angle of RUB 90°. The alignment angle of RUB 80° can be regarded as that, on the basis of the alignment angle of RUB 90°, the alignment direction of one of the first alignment layer 12 and the second alignment layer 13 is deflected 10° clockwise or 10° counterclockwise, so that the alignment direction of the first alignment layer 12 and the alignment direction of the second alignment layer 13 form an angle of 80°.

[0143] In this embodiment, by maintaining the RUB angle of the dimming panel 10 within a set range, the transmittance of the dimming panel 10 in the shared mode can be improved. When light of the same brightness passes through the dimming panel 10 and is emitted, the higher the transmittance of the dimming panel 10, the less light loss the light suffers during its passage through the dimming panel 10, and the higher the display brightness of the display device 100. Compared to a dimming panel 10 with a 90° RUB design, the improved transmittance of the dimming panel 10 in the shared mode helps reduce the power consumption of the display device 100.

[0144] At the same time, when the dimming panel 10 is in the anti-peeping state, compared with the dimming panel 10 adopting the RUB 90° design, the transmittance of the dimming panel 10 in the set direction is reduced, thereby improving the anti-peeping display effect of the display device 100 in the set direction.

[0145] Exemplarily, the vertical phase delay Δnd of the dimming panel 10 is greater than or equal to 400 nm and less than or equal to 1200 nm.

[0146] The vertical phase delay Δnd of the dimming panel 10 is within the range of 400 nm to 1200 nm, which can prevent excessive brightness attenuation of light after passing through the dimming panel 10 when the dimming panel 10 is in the anti-peep state, thereby ensuring good brightness and color performance within the first viewing area S1 of the display device 100.

[0147] Taking the display device 100 including a dimming panel 10, and both the dimming panel 10 and the display panel 20 being liquid crystal display panels as an example, the transmittance of the dimming panel 10 at different RUB angles and the anti-peeping effect of some embodiments of the present disclosure are described.

[0148] The following describes the transmittance and anti-peeping effect of the dimming panel 10 at different RUB angles according to some embodiments of the present disclosure, taking the vertical phase delay Δnd of the dimming panel 10 as 600 nm as an example.

[0149] Figure 12 is a curve diagram showing the change of transmittance in a set direction of the dimming panel 10 with different RUB angles as a function of the viewing angle. Figure 13 for Figure 12 A partial enlarged view of . Figure 12 and Figure 13 The horizontal axis is the maximum value of the angle formed between the outgoing light of the dimming panel 10 and the reference direction perpendicular to the display surface of the display device 100, which can also be regarded as the viewing angle θ of the display device 100 in the set direction; the vertical axis is the transmittance of the dimming panel 10.

[0150] like Figure 12 and Figure 13As shown, when θ is in the range of 35° to 45°, the dimming panels 10 with RUB 75°, RUB 80°, and RUB 85° have lower transmittance in the set direction in the anti-peeping display state than the dimming panel 10 with RUB 90°, thereby improving the anti-peeping effect of the display device 100 in the set direction.

[0151] Figure 14 is a normalized curve diagram showing the change of transmittance in a set direction of the dimming panel 10 with different RUB angles as a function of the viewing angle, Figure 15 for Figure 14 A partial enlarged view of . Figure 14 and Figure 15 In FIG. 1 , the horizontal axis is the angle formed between the outgoing light of the dimming panel 10 and the reference direction perpendicular to the display surface of the display device 100 ; the vertical axis is the transmittance of the dimming panel 10 .

[0152] like Figure 14 and Figure 15 As shown, after normalizing the transmittance data of the dimming panels 10 with different RUB angles at different viewing angles, it can be clearly seen that when the viewing angle θ is in the range of 35° to 45°, the dimming panel 10 with an RUB of 80° has a lower transmittance in the set direction than the dimming panels 10 with other RUB angles, thereby enabling the display device 100 to have a better anti-peeping display effect.

[0153] Table 1: Transmittance of the dimming panel 10 in a set direction at different RUB angles and viewing angles θ

[0154] Viewing angle θ RUB 90° RUB 85° RUB 80° RUB 75° 25° 13.3％ 12.37％ 13.4％ 16.42％ 40° 3.26％ 0.56％ 0.13％ 2.03％ 45° 5.37％ 1.91％ 0.68％ 1.81％ 60° 15.9％ 10.29％ 6.63％ 5.16％

[0155] The percentage value in Table 1 is the ratio of the anti-peeping state brightness of the dimming panel 10 to the center brightness. This value can be regarded as the transmittance of the dimming panel 10 in the set direction in the anti-peeping state. The smaller the value, the lower the transmittance of the dimming panel 10 in the anti-peeping state, and the better the anti-peeping display effect of the display device 100.

[0156] In summary, combined Figures 12 to 15 , and Table 1, when the viewing angle θ is in the range of 30° to 45°, the dimming panel 10 with RUB 80° has a good anti-peeping display effect.

[0157] Figure 16 The figure is a curve showing how the transmittance of the dimming panel changes with the RUB angle at different viewing angles. Figure 16 The horizontal axis is a curve diagram showing the change of transmittance in a set direction of the dimming panel 10 with different RUB angles versus viewing angle; the vertical axis is the transmittance of the dimming panel 10 .

[0158] Figure 17 The normalized curve diagram of the transmittance of the dimming panel at different viewing angles changes with the RUB angle. Figure 17 The horizontal axis is the angle formed between the outgoing light of the dimming panel 10 and the reference direction perpendicular to the display surface of the display device 100 ; the vertical axis is the transmittance of the dimming panel 10 .

[0159] like Figure 17 As shown, after normalizing the transmittance data of the dimming panels 10 with different RUB angles at different viewing angles, it can be clearly seen that when the viewing angle θ is in the range of 20° to 45°, the dimming panel 10 with an RUB of 80° has a lower transmittance in the anti-peeping display area than the dimming panels 10 with other RUB angles, thereby enabling the display device 100 to have a better anti-peeping display effect.

[0160] Figure 18 The ratio of the region Q1 in the entire graph is the ratio of the portion of the RUB 90° dimming panel 10 whose transmittance is greater than or equal to 0.3 in the shared state. Figure 19 The ratio of the region Q2 in the entire graph is the ratio of the portion of the RUB 80° dimming panel 10 whose transmittance in the shared state is greater than or equal to 0.3.

[0161] It can be seen that the proportion of the portion of the RUB 80° dimming panel 10 with a transmittance greater than or equal to 0.3 in the shared state is greater than the proportion of the portion of the RUB 90° dimming panel 10 with a transmittance greater than or equal to 0.3 in the shared state. That is, in the shared state, the transmittance of the RUB 80° dimming panel 10 is higher than that of the RUB 90° dimming panel 10, and the shared display effect is better.

[0162] Figure 20 The ratio of the area Q1 in the figure to the entire figure is the ratio of the portion of the RUB 90° dimming panel 10 whose transmittance is greater than or equal to 0.3 in the anti-peep state. Figure 21 The ratio of the region Q2 in the entire graph is the ratio of the portion of the RUB 80° dimming panel 10 whose transmittance is greater than or equal to 0.3 in the anti-peep state.

[0163] It can be seen that the proportion of the portion of the RUB 80° dimming panel 10 with a transmittance greater than or equal to 0.3 in the anti-peeping state is smaller than the proportion of the portion of the RUB 90° dimming panel 10 with a transmittance greater than or equal to 0.3 in the anti-peeping state. That is, in the anti-peeping state, the transmittance of the RUB 80° dimming panel 10 is lower than that of the RUB 90° dimming panel 10, and the anti-peeping display effect is better.

[0164] Taking the vertical phase delay Δnd of the dimming panel 10 as 400 nm as an example, the transmittance and anti-peeping effect of the dimming panel 10 at different RUB angles according to other embodiments of the present disclosure are described below.

[0165] Figure 22 is another variation curve of the transmittance in the set direction of the dimming panel 10 with different RUB angles versus the viewing angle, Figure 22 The horizontal axis in is the angle formed between the outgoing light of the dimming panel 10 and the reference direction perpendicular to the display surface of the display device 100 , which can also be regarded as the viewing angle of the display device 100 ; the vertical axis is the transmittance of the dimming panel 10 .

[0166] Figure 23 is another graph showing how the transmittance in the set direction of the dimming panel 10 with different RUB angles changes with the viewing angle. Figure 23 The horizontal axis is the angle formed between the outgoing light of the dimming panel 10 and the reference direction perpendicular to the display surface of the display device 100 ; the vertical axis is the transmittance of the dimming panel 10 .

[0167] When the viewing angle θ is within the range of 40° to 45°, the dimming panel 10 with RUB 70° to RUB 80° has lower transmittance in the set direction than the dimming panel 10 with RUB 80°, so that the display device 100 can have a better anti-peeping effect in the set direction.

[0168] Figure 24 The ratio of the region Q1 in the entire graph is the ratio of the portion of the RUB 90° dimming panel 10 whose transmittance is greater than or equal to 0.3 in the shared state. Figure 25 The ratio of the region Q2 in the entire graph is the ratio of the portion of the RUB 80° dimming panel 10 whose transmittance is greater than or equal to 0.3 in the shared state.

[0169] It can be seen that the proportion of the portion of the RUB 80° dimming panel 10 with a transmittance greater than or equal to 0.3 in the shared state is greater than the proportion of the portion of the RUB 90° dimming panel 10 with a transmittance greater than or equal to 0.3 in the shared state. That is, in the shared state, the transmittance of the RUB 80° dimming panel 10 is higher than that of the RUB 90° dimming panel 10, and the shared display effect is better.

[0170] Figure 26 The ratio of the area Q1 in the figure to the entire figure is the ratio of the portion of the RUB 90° dimming panel 10 whose transmittance is greater than or equal to 0.3 in the anti-peep state. Figure 27 The ratio of the region Q2 in the entire graph is the ratio of the portion of the RUB 80° dimming panel 10 whose transmittance is greater than or equal to 0.3 in the anti-peep state.

[0171] It can be seen that the proportion of the portion of the RUB 80° dimming panel 10 with a transmittance greater than or equal to 0.3 in the anti-peeping state is smaller than the proportion of the portion of the RUB 90° dimming panel 10 with a transmittance greater than or equal to 0.3 in the anti-peeping state. That is, in the anti-peeping state, the transmittance of the RUB 80° dimming panel 10 is lower than that of the RUB 90° dimming panel 10, and the anti-peeping display effect is better.

[0172] Taking the display device 100 including two dimming panels 10, and both the dimming panel 10 and the display panel 20 being liquid crystal display panels as an example, the transmittance of the dimming panel 10 at different RUB angles and the anti-peeping effect of some embodiments of the present disclosure are described.

[0173] In this case, the vertical phase delay Δnd of the dimming panel 10 may be 1000 nm.

[0174] Table 2: Transmittance of the dimming panel 10 in a set direction at different RUB angles and viewing angles θ

[0175] Viewing angle θ 25° 40° 45° 60° RUB 90° 1.83％ 0.11％ 0.29％ 2.74％ RUB 80° 1.85％ 0.004％ 0.01％ 0.50％

[0176] The percentage value in Table 2 is the ratio of the anti-peeping state brightness of the dimming panel 10 to the center brightness. This value can be regarded as the transmittance of the dimming panel 10 in the set direction in the anti-peeping state. The smaller the value, the lower the transmittance of the dimming panel 10 in the anti-peeping state, and the better the anti-peeping display effect of the display device 100.

[0177] When the display device 100 includes two dimming panels 10 , when the viewing angle θ is in the range of 30° to 45°, the dimming panel 10 with RUB 80° has a better anti-peeping display effect than the dimming panel 10 with RUB 90°.

[0178] Figure 28 The ratio of the region Q1 in the entire graph is the ratio of the portion of the RUB 90° dimming panel 10 whose transmittance is greater than or equal to 0.3 in the shared state. Figure 29 The ratio of the region Q2 in the entire graph is the ratio of the portion of the RUB 80° dimming panel 10 whose transmittance is greater than or equal to 0.3 in the shared state.

[0179] It can be seen that the proportion of the portion of the RUB 80° dimming panel 10 with a transmittance greater than or equal to 0.3 in the shared state is greater than the proportion of the portion of the RUB 90° dimming panel 10 with a transmittance greater than or equal to 0.3 in the shared state. That is, in the shared state, the transmittance of the RUB 80° dimming panel 10 is higher than that of the RUB 90° dimming panel 10, and the shared display effect is better.

[0180] Figure 30 The ratio of the area Q1 in the figure to the entire figure is the ratio of the portion of the RUB 90° dimming panel 10 whose transmittance is greater than or equal to 0.3 in the anti-peep state. Figure 31 The ratio of the region Q2 in the entire graph is the ratio of the portion of the RUB 80° dimming panel 10 whose transmittance is greater than or equal to 0.3 in the anti-peep state.

[0181] It can be seen that the proportion of the portion of the RUB 80° dimming panel 10 with a transmittance greater than or equal to 0.3 in the anti-peeping state is smaller than the proportion of the portion of the RUB 90° dimming panel 10 with a transmittance greater than or equal to 0.3 in the anti-peeping state. That is, in the anti-peeping state, the transmittance of the RUB 80° dimming panel 10 is lower than that of the RUB 90° dimming panel 10, and the anti-peeping display effect is better.

[0182] Based on the foregoing, in some embodiments, the angle formed by the alignment direction of the first alignment layer 12 and the alignment direction of the second alignment layer 13 is greater than or equal to 75° and less than or equal to 85°. In other embodiments, the angle formed by the alignment direction of the first alignment layer 12 and the alignment direction of the second alignment layer 13 is greater than or equal to 70° and less than or equal to 80°.

[0183] By maintaining the angle formed by the alignment direction of the first alignment layer 12 and the alignment direction of the second alignment layer 13 within a set range, the dimming panel 10 can have good transmittance in both the first viewing area S1 and the side viewing area when in the shared state, so that the display device 100 can achieve a good shared display effect; and when the dimming panel 10 is in the anti-peeping state, the transmittance of the dimming panel 10 in the set direction decreases, so that the display device 100 has a good anti-peeping effect in the set direction.

[0184] Based on the above, in some embodiments, such as Figure 11 As shown, the display device 100 includes multiple (two or more) polarizers. Polarizers are provided on both sides of the dimming panel 10, and the polarization directions of the polarizers on both sides of the dimming panel 10 are crossed.

[0185] By placing polarizers on both sides of the dimming panel 10, the dimming panel 10 can be protected. The polarizer located on the light-emitting side of the dimming panel 10, facing away from the display device 100, is referred to as the lower polarizer of the dimming panel 10, while the polarizer located on the light-emitting side of the dimming panel 10, facing the display device 100, is referred to as the upper polarizer of the dimming panel 10. The lower polarizer converts light directed toward the dimming panel 10 into linearly polarized light, while the upper polarizer interprets the polarized light electrically modulated by the liquid crystal molecules within the dimming liquid crystal layer 11, generating light-dark contrast.

[0186] In some examples, the polarization directions of the polarizers on both sides of the dimming panel 10 are perpendicular.

[0187] In other examples, the alignment directions of the first alignment layer 12 and the second alignment layer 13 in the dimming panel 10 form an acute angle. In this case, the polarization directions of the polarizers on both sides of the dimming panel 10 can be perpendicular to each other, or form an acute angle.

[0188] like Figure 11 As shown, the first alignment layer 12 of the first dimming panel 10a is adjacent to the fourth polarizer P4, and the second alignment layer 13 of the first dimming panel 10a is adjacent to the third polarizer P3. The alignment direction of the first alignment layer 22 is parallel to the polarization direction of the fourth polarizer P4, and / or the alignment direction of the second alignment layer 13 is parallel to the polarization direction of the third polarizer P3.

[0189] When the alignment direction of the first alignment layer 22 is parallel to the polarization direction of the fourth polarizer P4, and the alignment direction of the second alignment layer 13 is parallel to the polarization direction of the third polarizer P3, the angle formed by the polarization directions of the polarizers on both sides of the dimming panel 10 is the same or approximately the same as the angle formed by the alignment directions of the first alignment layer 12 and the second alignment layer 13 of the dimming panel 10.

[0190] The range of the angle formed by the polarization directions of the polarizers on both sides of the dimming panel 10 is the same as or substantially the same as the range of the angle formed by the alignment directions of the first alignment layer 12 and the second alignment layer 13 of the dimming panel 10 .

[0191] like Figure 11 As shown, the fourth polarizer P4 is used to convert the light directed to the first dimming panel 10a into linearly polarized light with the same orientation direction as the first alignment layer 12, and the third polarizer P3 is used to analyze the light after the liquid crystal molecules in the dimming liquid crystal layer 11 of the first dimming panel 10a are electrically modulated.

[0192] When the first dimming panel 10a is in the anti-peeping state, it is converted into elliptically polarized light or circularly polarized light after passing through the dimming liquid crystal layer 11. When the elliptically polarized light or circularly polarized light passes through the first polarizer P1, the linear polarized light consistent with the polarization direction of the first polarizer P1 can pass through the third polarizer P3 and be emitted. At this time, a light and dark contrast is generated in the first viewing area S1 and the two sides of the first viewing area S1 along the set direction (the second viewing area S2 or the third viewing area S3). The display brightness of the display device 100 in the first viewing area S1 is greater than the display brightness on both sides of the first viewing area S1 above the set direction, thereby realizing anti-peeping of the display device 100 in the set direction.

[0193] like Figure 11As shown, taking the example where the alignment direction of the first alignment layer 22 of the first dimming panel 10a is parallel to the polarization direction of the fourth polarizer P4, and the alignment direction of the second alignment layer 13 of the first dimming panel 10a is parallel to the polarization direction of the third polarizer P3, when the first dimming panel 10a is not powered, the first dimming panel 10a has good light transmittance, and the light emitted by the display panel 20 or the backlight module 30 can pass through the first dimming panel 10a to achieve shared display, and the display device 10 has a good picture display effect.

[0194] When a driving voltage is applied to the first dimming panel 10a, the liquid crystal molecules in the dimming liquid crystal layer 11 are deflected under the drive of the electric field. Part of the light emitted by the display panel 20 or the backlight module 30 is blocked by the liquid crystal molecules in the dimming liquid crystal layer 11 and cannot pass through the dimming panel 10. By converging the maximum emission angle of the light emitted through the dimming panel 10, the visible range of the emitted light of the display device 100 (the visible angle θ mentioned above) is converged to achieve anti-peeping display.

[0195] In this case, in the shared display state, the dimming panel 10 is not powered and does not consume power; in the anti-peeping display state, the dimming panel 10 consumes power. This helps reduce the power consumption of the display device 100 in application scenarios where the shared display state is used more frequently and the anti-peeping display state is used less frequently.

[0196] Accordingly, for application scenarios where the anti-peeping display state is used more frequently and the shared display state is used less frequently, the alignment direction of the first alignment layer 12 can be perpendicular to the polarization direction of the second polarizer P2, or the alignment direction of the second alignment layer 13 can be perpendicular to the polarization direction of the first polarizer P1.

[0197] Thus, when the dimming panel 10 is unpowered, light emitted by the display panel 20 or the backlight module 30 cannot pass through, or can only partially pass through, the dimming panel 10. The dimming panel 10 has a low transmittance, resulting in a smaller viewing angle θ of the display device 100, thus achieving an anti-peeping display. When a driving voltage is applied to the dimming panel 10, the transmittance of the dimming panel 10 increases, thereby increasing the viewing angle θ of the display device 100, thus achieving a shared display.

[0198] Alternatively, in this application scenario, the dimming panel 10 may not include an alignment layer. When the dimming panel 10 is unpowered, without the anchoring effect of the alignment layer, the liquid crystal molecules in the dimming liquid crystal layer 11 are in a disordered state, resulting in a low transmittance of the dimming panel 10 and a small viewing angle θ of the display device 100. When a driving voltage is applied to the dimming panel 10, the liquid crystal molecules in the dimming liquid crystal layer 11 are orderly aligned under the action of the electric field, increasing the transmittance of the dimming panel 10 and thus increasing the viewing angle θ of the display device 100, thereby achieving shared display.

[0199] Based on the above embodiments, in some embodiments, the display panel 20 is a liquid crystal display panel, such as Figure 11 As shown, the display panel 20 includes a third alignment layer 22 , a display liquid crystal layer 21 and a fourth alignment layer 23 which are sequentially arranged.

[0200] When the display panel 20 adopts the TN display mode, the alignment directions of the third alignment layer 22 and the fourth alignment layer 23 are both horizontal, and the alignment directions of the third alignment layer 22 and the fourth alignment layer 23 are perpendicular.

[0201] The polarization directions of the polarizers on both sides of the display panel 20 may be perpendicular or parallel, or the polarization directions of the polarizers on both sides of the display panel 20 may form an acute angle therebetween, and the angle of this angle is in the same or substantially the same range as the angle between the alignment directions of the first alignment layer 12 and the second alignment layer 13 of the dimming panel 10. For example, the angle formed by the polarization directions of the polarizers on both sides of the display panel 20 is greater than or equal to 70° and less than or equal to 85°.

[0202] For example, Figure 11 As shown, the polarization direction of the first polarizer P1 is perpendicular to the polarization direction of the second polarizer P2. The polarization direction of the second polarizer P2 is parallel to the alignment direction of the third alignment layer 22, and the alignment direction of the fourth alignment layer 23 is parallel to the polarization direction of the third polarizer P3.

[0203] like Figure 11 As shown, when the dimming panel 10 is in the shared state, the dimming panels 10 (the first dimming panel 10 a and the second dimming panel 10 b ) are in an unpowered state, and the display device 100 displays images in the shared display state.

[0204] When the dimming panel 10 is in the anti-peeping state, the dimming panel 10 is powered on, and the display device 100 displays in the anti-peeping display state, thereby achieving anti-peeping in a set direction.

[0205] In some embodiments, the display device 100 further includes a display driver chip and a dimming driver chip.

[0206] The display driver chip is connected to the display panel 20 . The display driver chip is used to transmit a display driving signal to the display panel 20 . The display driving signal is used to control the display panel 20 to display an image to be displayed.

[0207] The dimming driver chip is connected to the dimming panel 10 . The dimming driver chip is used to transmit a dimming drive signal to the dimming panel 10 . The dimming signal can control the dimming panel 10 to switch between a shared state and an anti-peeping state.

[0208] Exemplarily, the display device 100 further includes a first circuit substrate and a second circuit board. The first circuit board is connected to the display driver chip, and the second circuit board is connected to the dimming driver chip. The first circuit substrate and the second circuit board are, for example, PCBs (Printed Circuit Boards) or FPCs (Flexible Printed Circuits).

[0209] The first circuit board is used to provide a display driving signal, and the second circuit board is used to provide a dimming driving signal.

[0210] In some embodiments, the dimming panel 10 further includes a first pixel electrode and a first common electrode. The first common electrode is configured to receive a constant common voltage signal, and the first pixel electrode is configured to receive a dimming drive signal. Driven by the dimming drive signal and the common voltage signal, an electric field is formed between the first pixel electrode and the first common electrode. This electric field is configured to drive the deflection of liquid crystal molecules in the dimming liquid crystal layer 11, thereby changing the maximum emission angle of light emitted through the dimming panel 10.

[0211] In the dimming panel 10, the first pixel electrode and the first common electrode can be located on the same side of the dimming liquid crystal layer 11, or can be located on opposite sides of the dimming liquid crystal layer 11. The first pixel electrode and the first common electrode include, but are not limited to, planar electrodes, strip electrodes, or block electrodes, which are not limited in this disclosure.

[0212] In some embodiments, the display device 100 further includes a half-wave plate disposed on one side of the display panel 20 .

[0213] When the display panel 20 is a liquid crystal display panel and the display panel 20 adopts the TN display mode, the alignment direction of the third alignment layer 22 of the display panel 20 is perpendicular to the alignment direction of the fourth alignment layer 23, and the light incident on the display panel 20 is twisted in the display liquid crystal layer 21, so that the angle of the light exiting the display panel 20 and the angle of the light passing through the display panel 20 are different.

[0214] By providing a 1 / 20 wave plate, the phase delay between the linearly polarized light exiting the display panel 20 and the linearly polarized light exiting the display panel 20 can be adjusted, thereby changing the polarization characteristics of the light passing through the 1 / 20 wave plate, so that the angles of the light exiting the display panel 20 and the light exiting the display panel 20 match. Compared to not providing a 1 / 2 wave plate, the display brightness of the display device 100 is improved.

[0215] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that a person skilled in the art can conceive within the technical scope disclosed in the present disclosure should be included within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A dimming panel, characterized in that: include: dimming liquid crystal layer; A first alignment layer is provided on one side of the dimming liquid crystal layer along the thickness direction of the dimming panel; A second alignment layer is provided on the other side of the dimming liquid crystal layer along the thickness direction of the dimming panel; The alignment direction of the first alignment layer and the alignment direction of the second alignment layer are horizontal alignments, and the alignment direction of the first alignment layer and the alignment direction of the second alignment layer form an acute angle.

2. The dimming panel according to claim 1, wherein: An angle formed by an alignment direction of the first alignment layer and an alignment direction of the second alignment layer is greater than or equal to 75° and less than or equal to 85°.

3. The dimming panel according to claim 1, wherein: An angle formed by an alignment direction of the first alignment layer and an alignment direction of the second alignment layer is greater than or equal to 70° and less than or equal to 80°.

4. The dimming panel according to any one of claims 1 to 3, characterized in that: The vertical phase delay of the dimming panel is greater than or equal to 400 nm and less than or equal to 1200 nm.

5. A display device, characterized in that: include: A display panel, used for displaying an image to be displayed; At least one dimming panel; the dimming panel is used to adjust the maximum emission angle of the light emitted by the display device; The dimming panel is the dimming panel according to any one of claims 1 to 4.

6. The display device according to claim 5, wherein: The display panel is an active light-emitting display panel, and the at least one dimming panel is located on the light-emitting side of the display panel.

7. The display device according to claim 6, wherein: The at least one dimming panel includes a first dimming panel; The display device further includes: a first polarizer, disposed on a side of the first dimming panel facing away from the display panel; The second polarizer is arranged between the first dimming panel and the display panel.

8. The display device according to claim 7, wherein: The at least one dimming panel further includes a second dimming panel; The second dimming panel is arranged between the first dimming panel and the display panel, and the second polarizer is arranged between the first dimming panel and the second dimming panel; The display device further includes: The third polarizer is arranged between the second dimming panel and the display panel.

9. The display device according to claim 5, wherein: The display panel is a non-active light-emitting display panel, and the at least one dimming panel includes a first dimming panel; the display device also includes a backlight module; The first dimming panel is arranged on a side of the display panel facing away from the backlight module; or, The first dimming panel is arranged between the display panel and the backlight module.

10. The display device according to claim 9, wherein The display device further includes: A first polarizer is provided on a side of the structure consisting of the display panel and the first dimming panel facing away from the backlight module; A second polarizer is provided between the display panel and the first dimming panel; The third polarizer is arranged on a side of the structure composed of the display panel and the first dimming panel close to the backlight module.

11. The display device according to claim 9, wherein The at least one dimming panel further includes a second dimming panel; The second dimming panel is arranged on a side of the display panel facing away from the backlight module; or, The second dimming panel is arranged between the display panel and the backlight module.

12. The display device according to claim 11, wherein The display device further includes: A first polarizer is provided on a side of the structure consisting of the display panel, the first dimming panel and the second dimming panel facing away from the backlight module; A second polarizer and a third polarizer are respectively arranged between two adjacent structures among the display panel, the first dimming panel and the second dimming panel; The fourth polarizer is disposed on a side of the structure consisting of the display panel, the first dimming panel, and the second dimming panel, which is close to the backlight module.

13. The display device according to any one of claims 5 to 12, characterized in that: When the display device includes at least two dimming panels, angles formed by the alignment directions of the first alignment layers and the second alignment layers of the at least two dimming panels are the same or different.

14. The display device according to any one of claims 7, 8, 10 and 12, characterized in that: The angle formed by the polarization directions of the polarizers on both sides of the dimming panel is the same as the angle formed by the alignment directions of the first alignment layer and the second alignment layer of the dimming panel.

15. The display device according to any one of claims 5 to 12, characterized in that: The display device further includes: The half-wave plate is arranged on one side of the display panel.

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