Light adjusting assembly and display module

Abstract

The application discloses a light adjusting assembly and a display module. The light adjusting assembly comprises a first light adjusting layer, a second light adjusting layer, a liquid crystal polymer light adjusting layer and a control electrode layer. The first light adjusting layer comprises a first light transmission layer with a plurality of first light transmission parts and a second light transmission layer with a plurality of second light transmission parts. The second light adjusting layer comprises a plurality of first light adjusting parts and a plurality of second light adjusting parts, which are arranged alternately and closely along a first direction. The liquid crystal polymer light adjusting layer comprises a plurality of cholesteric liquid crystal polymer films which are spaced and correspond to the plurality of second light adjusting parts one by one. The control electrode layer comprises a plurality of control electrodes which are electrically connected to the plurality of cholesteric liquid crystal polymer films one by one. The cholesteric liquid crystal polymer film is configured to be switched between a light transmission state and a light reflection state. The first light adjusting part is configured to allow light incident thereinto to be emitted. The second light adjusting part is configured to cooperate with the cholesteric liquid crystal polymer film, so that the light incident thereinto can be emitted from the second light adjusting part or transmitted to the first light adjusting layer. Through the above arrangement, the problems of insufficient light utilization and low brightness are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a light adjusting assembly and a display module. BACKGROUND

[0002] With the development of display technology, display panels need a wider viewing angle so that users can view the content displayed by the display panel at various angles. However, in public places, the increase in the viewing angle also brings unnecessary trouble to the user's privacy leakage. In this case, a narrow viewing angle is needed for privacy protection. Therefore, the demand for display panels that can control wide and narrow viewing angles is gradually increasing.

[0003] At present, a privacy protection film is usually used to realize the switching of the wide and narrow viewing angles of the display panel. However, the related art has the problems of low light transmittance, insufficient light utilization, and low brightness of the display panel. SUMMARY

[0004] The present application mainly provides a light adjusting assembly and a display module to solve the problems of insufficient light utilization and low brightness of the display panel in the related art.

[0005] To solve the above technical problems, one technical solution adopted by the present application is to provide a light adjusting assembly applied to a display module, comprising:

[0006] A first light adjusting layer comprising a first light transmitting layer and a second light transmitting layer, the first light transmitting layer comprising a plurality of first light transmitting portions, and the second light transmitting layer comprising a plurality of second light transmitting portions; along a first direction, the first light transmitting portions and the second light transmitting portions are alternately and embeddedly arranged; the refractive indexes of the first light transmitting portions and the second light transmitting portions are different;

[0007] A second light adjusting layer arranged on one side of the first light adjusting layer; comprising a plurality of first light adjusting portions and a plurality of second light adjusting portions; along the first direction, the first light adjusting portions and the second light adjusting portions are alternately and closely arranged; the refractive indexes of the first light adjusting portions and the second light adjusting portions are different;

[0008] A liquid crystal polymer light adjusting layer arranged on one side of the second light adjusting layer, comprising a plurality of cholesteric liquid crystal polymer films arranged at intervals, and the plurality of cholesteric liquid crystal polymer films are one-to-one corresponding to the plurality of second light adjusting portions;

[0009] A control electrode layer arranged on one side of the liquid crystal polymer light adjusting layer, comprising a plurality of control electrodes; the plurality of control electrodes are one-to-one electrically connected to the plurality of cholesteric liquid crystal polymer films;

[0010] The cholesteric liquid crystal polymer film is configured to be capable of switching between a light transmitting state and a light reflecting state under the control of the control electrode.

[0011] The first light adjusting part is configured to allow light incident thereto to exit; and the second light adjusting part is configured to cooperate with the cholesteric liquid crystal polymer film to allow light incident to the second light adjusting part to exit from the second light adjusting part or to transmit light incident to the second light adjusting part to the first light adjusting layer.

[0012] In some embodiments, the control electrode is configured to be switchable between an energized state and a de-energized state; when the control electrode is in the energized state, the cholesteric liquid crystal polymer film is in the light reflecting state; and when the control electrode is in the de-energized state, the cholesteric liquid crystal polymer film is in the light transmitting state.

[0013] In some embodiments, the material of the second light adjusting part is a negative refractive index material, and the material of the first light adjusting part is a positive refractive index material.

[0014] The liquid crystal polymer light adjusting layer is disposed on the side of the second light adjusting layer close to the first light adjusting layer; and the control electrode layer is disposed on the side of the liquid crystal polymer light adjusting layer close to the first light adjusting layer.

[0015] In some embodiments, the surface of the second light adjusting part abutting the first light adjusting part is a plane, the surface of the second light adjusting part abutting the cholesteric liquid crystal polymer film is a plane, and the surface of the second light adjusting part away from the first light adjusting layer is a plane.

[0016] The second light adjusting part is configured to negatively refract light incident to the second light adjusting part and light exiting from the second light adjusting part.

[0017] The cholesteric liquid crystal polymer film is configured to reflect light incident to the cholesteric liquid crystal polymer film when in the light reflecting state, and to allow light incident to the cholesteric liquid crystal polymer film to exit when in the light transmitting state.

[0018] In some embodiments, the material of the second light adjusting part includes any one of a silver-aluminum mixed material, a copper crystal film combined material; and / or,

[0019] The material of the first light adjusting part includes borate glass.

[0020] In some embodiments, the refractive index of the second light adjusting part is -1.12 to -0.92, the refractive index of the first light adjusting part is 1.67 to 1.87; and / or,

[0021] The material of the first light transmitting part includes silicate glass; and / or,

[0022] the first light-transmitting portion has a refractive index of 1.40 to 1.62; and / or,

[0023] the second light-transmitting portion comprises a borate glass; and / or,

[0024] the second light-transmitting portion has a refractive index of 1.67 to 1.87; and / or,

[0025] the cholesteric liquid crystal polymer film has a refractive index of 1.67 to 1.87; and / or,

[0026] the control electrode has a refractive index of 1.67 to 1.87.

[0027] In some embodiments, the second light-adjusting portion and the first light-adjusting portion are both made of positive refractive index material.

[0028] the liquid crystal polymer light-adjusting layer is disposed on a surface of the second light-adjusting portion away from the first light-adjusting layer, the surface of the second light-adjusting portion away from the first light-adjusting layer is a curved surface, and the curved surface is a convex surface protruding towards the liquid crystal polymer light-adjusting layer;

[0029] the control electrode layer is disposed on a side of the liquid crystal polymer light-adjusting layer away from the first light-adjusting layer;

[0030] the cholesteric liquid crystal polymer film is configured to reflect light incident on the cholesteric liquid crystal polymer film when in a light-reflecting state and allow light incident on the cholesteric liquid crystal polymer film to exit when in a light-transmitting state.

[0031] In some embodiments, the second light-adjusting portion comprises a silicate glass; and / or, the second light-adjusting portion has a refractive index of 1.40 to 1.62; and / or,

[0032] the first light-adjusting portion comprises a borate glass; and / or, the first light-adjusting portion has a refractive index of 1.9 to 2.2; and / or,

[0033] the first light-adjusting portion comprises a silicate glass; and / or, the first light-adjusting portion has a refractive index of 1.40 to 1.62; and / or,

[0034] the second light-adjusting portion comprises a cerium oxide coating; and / or, the second light-adjusting portion has a refractive index of 1.9 to 2.2; and / or,

[0035] the cholesteric liquid crystal polymer film has a refractive index of 1.40 to 1.62; and / or,

[0036] the control electrode has a refractive index of 1.40 to 1.62.

[0037] In some embodiments, the dimming component further includes a microstructure layer, which is disposed between the first dimming layer and the second dimming layer and includes a plurality of microstructure groups, wherein the plurality of microstructure groups are disposed in a one-to-one correspondence with the plurality of second dimming units;

[0038] Each of the microstructure groups includes a plurality of closely adjacent microprisms, wherein the surface of the microprism close to the second light modulating portion is a conical surface, and the conical surface is a convex surface protruding toward one side of the second light modulating portion;

[0039] The refractive index of the conical surface gradually increases from the side of the conical surface close to the first dimming layer to the side away from the first dimming layer; or, in the radial direction of the microprism, the refractive index of the conical surface gradually increases from the center to the edge of the conical surface.

[0040] In some embodiments, the first light-transmitting portion is a first prism, the second light-transmitting portion is a second prism, the prism peaks of the first prisms are arranged toward the second dimming layer, and the prism peaks of the second prisms are arranged away from the second dimming layer; the first prism is embedded between two adjacent second prisms, and the prism peaks of multiple first prisms are flush with the bottom surfaces of multiple second prisms, and the prism peaks of multiple second prisms are flush with the bottom surfaces of multiple first prisms;

[0041] And / or, the vertex angle of the first prism is 90°, and the vertex angle of the second prism is 90°.

[0042] To solve the above technical problems, another technical solution adopted by the present application is to provide a display module, comprising:

[0043] Display panel;

[0044] A backlight module, disposed on one side of the display panel, for providing a backlight source for the display panel;

[0045] Any one of the dimming components described above; the dimming component is arranged on the side of the display panel close to the backlight module, and the first dimming layer is located on the side of the second dimming layer close to the backlight module; the dimming component is configured to enable the display module to switch between anti-peep mode and wide-viewing angle mode.

[0046] The beneficial effects of the present application are: different from the prior art, the present application discloses a dimming assembly and a display module, the dimming assembly is applied to the display module, and the dimming assembly comprises: a first dimming layer, comprising a first light transmission layer and a second light transmission layer, the first light transmission layer comprises a plurality of first light transmission parts, and the second light transmission layer comprises a plurality of second light transmission parts; along a first direction, the first light transmission parts and the second light transmission parts are alternately and embeddedly arranged; the refractive indexes of the first light transmission parts and the second light transmission parts are different; a second dimming layer is arranged on one side of the first dimming layer, comprising a plurality of first dimming parts and a plurality of second dimming parts, along the first direction, the first dimming parts and the second dimming parts are alternately and closely arranged; the refractive indexes of the first dimming parts and the second dimming parts are different; a liquid crystal polymer dimming layer is arranged on one side of the second dimming layer, comprising a plurality of cholesteric liquid crystal polymer films arranged at intervals, and the plurality of cholesteric liquid crystal polymer films are one-to-one correspondingly arranged with the plurality of second dimming parts; a control electrode layer is arranged on one side of the liquid crystal polymer dimming layer, comprising a plurality of control electrodes; the plurality of control electrodes are one-to-one correspondingly electrically connected with the plurality of cholesteric liquid crystal polymer films; wherein the cholesteric liquid crystal polymer film is configured to be capable of being switched between a light transmission state and a light reflection state under the control of the control electrode; the first dimming part is configured to allow light incident therein to be emitted; the second dimming part is configured to cooperate with the cholesteric liquid crystal polymer film to enable light incident to the second dimming part to be emitted from the second dimming part or to transmit the light incident to the second dimming part to the first dimming layer. By alternately and closely arranging the first dimming part and the second dimming part, switching the cholesteric liquid crystal polymer film between the light transmission state and the light reflection state under the control of the control electrode, allowing the light incident to the first dimming part to be emitted, cooperating the second dimming part with the cholesteric liquid crystal polymer film, so that the light incident to the second dimming part can be emitted from the second dimming part or be transmitted to the first dimming layer, the switching between the wide viewing angle mode and the narrow viewing angle mode is realized, and in the narrow viewing angle mode, i.e. the anti-peeping mode, the light incident to the second dimming part can be retransmitted to the first dimming layer, and after being re-adjusted by the first dimming layer, the light can be re-emitted from the first dimming part, effectively improving the utilization rate of the light incident to the second dimming part, and in the wide viewing angle mode and the narrow viewing angle mode, the light can have a high transmittance, which is beneficial to improving the display brightness of the display panel, improving the display performance, and solving the problems of insufficient light utilization and low brightness of the display panel in the related art. BRIEF DESCRIPTION OF DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0048] Figure 1is a structural schematic diagram of a display module provided by an embodiment of the present application;

[0049] Figure 2 is Figure 1 is a cross-sectional schematic diagram of a first embodiment of the display module provided by the present application;

[0050] Figure 3 is Figure 2 is a cross-sectional schematic diagram of a light adjusting assembly of the display module provided by the present application;

[0051] Figure 4 is Figure 2 is a light transmission schematic diagram of the display module in a wide viewing angle mode provided by the present application;

[0052] Figure 5 is Figure 2 is a light transmission schematic diagram of the display module in a narrow viewing angle mode provided by the present application;

[0053] Figure 6 is Figure 1 is a cross-sectional schematic diagram of a second embodiment of the display module provided by the present application;

[0054] Figure 7 is Figure 6 is a cross-sectional schematic diagram of a light adjusting assembly of the display module provided by the present application;

[0055] Figure 8 is Figure 6 is a light transmission schematic diagram of the display module in a wide viewing angle mode provided by the present application;

[0056] Figure 9 is Figure 6 is a light transmission schematic diagram of the display module in a narrow viewing angle mode provided by the present application.

[0057] Reference Signs:

[0058] 400, display module; 300, display panel; 200, backlight module; 100, light adjusting assembly; 1, first light adjusting layer; 11, first light transmission layer; 111, first light transmission part; 12, second light transmission layer; 112, second light transmission part; 2, second light adjusting layer; 21, first light adjusting part; 22, second light adjusting part; 3, liquid crystal polymer light adjusting layer; 31, cholesteric liquid crystal polymer film; 4, control electrode layer; 41, control electrode; 5, microstructure layer; 51, microstructure group. DETAILED DESCRIPTION

[0059] With reference to the drawings and in the examples described herein, the technical solutions in the examples of the present application will be described clearly and completely. Obviously, the described examples are only a part of the examples of the present application, rather than all the examples. Based on the examples in the present application, all other examples obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0060] The terms "first", "second", "third" in the examples of the present application are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", "third" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device.

[0061] In this document, the reference to "an example" means that a particular feature, structure, or characteristic described in connection with the example can be included in at least one example of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same example, nor is it necessarily mutually exclusive of other examples. It is explicitly and implicitly understood that the examples described herein can be combined with other examples.

[0062] Referring to Figures 1 to 9 An embodiment of the present application provides a display module 400, which comprises a display panel 300, a dimming assembly 100 and a backlight module 200.

[0063] Referring to Figure 2 And Figure 6 Wherein, the backlight module 200 is arranged on one side of the display panel 300, for providing a backlight source for the display panel 300, and the dimming assembly 100 is arranged on the side of the display panel 300 close to the backlight module 200, and the dimming assembly 100 is used for adjusting the light emitted from the backlight module 200 to the display panel 300. Specifically, the dimming assembly 100 is configured to enable the display panel 300 of the display module 400 to switch between a privacy mode (narrow viewing angle mode) and a wide viewing angle mode, so as to meet different use requirements and expand the application scenarios of the display module 400.

[0064] The display panel 300 is used to realize the image display function. The display panel 300 can be a liquid crystal display panel (LCD), such as a TN (Twisted Nematic) display panel, an IPS (In-Plane Switching) display panel, a VA (Vertical Alignment) display panel, or an MVA (Multi-Domain Vertical Alignment) display panel, or other display panel that cannot emit light autonomously.

[0065] In this embodiment, the light adjustment assembly 100 is a separate structure independent of the display panel 300 and the backlight module 200. The light adjustment assembly 100 can be applied to different display modules 400 to adjust the light emitted towards the display panel 300 in the display module 400, change the viewing angle and display mode of the display panel 300, and meet different requirements.

[0066] In other embodiments, the light adjustment assembly 100 can also be directly arranged in the display panel 300 as a part of the display panel 300. Specifically, the light adjustment assembly 100 is arranged on the light-in side of the display panel 300, or the light adjustment assembly 100 can also be arranged in the backlight module 200 as a part of the backlight module 200. Specifically, the light adjustment assembly 100 is arranged on the light-out side of the backlight module 200, which can be designed as needed.

[0067] Specifically, referring to Figure 3 and Figure 7 , the light adjustment assembly 100 includes a first light adjustment layer 1, a second light adjustment layer 2, a liquid crystal polymer light adjustment layer 3, and a control electrode layer 4. The first light adjustment layer 1 is located on the side of the second light adjustment layer 2 close to the backlight module 200. The light emitted by the backlight module 200 towards the display panel 300 first enters the first light adjustment layer 1, is affected by the first light adjustment layer 1, then enters the second light adjustment layer 2, and is transmitted from the side of the second light adjustment layer 2 away from the first light adjustment layer 1 to the display panel 300 after being adjusted by the second light adjustment layer 2.

[0068] Referring to Figure 3 and Figure 7 , the second light adjustment layer 2 is arranged on the side of the first light adjustment layer 1. Specifically, the second light adjustment layer 2 includes a plurality of first light adjustment portions 21 and a plurality of second light adjustment portions 22. Along the first direction, the first light adjustment portions 21 and the second light adjustment portions 22 are arranged alternately and closely. The refractive index of the first light adjustment portions 21 is different from that of the second light adjustment portions 22.

[0069] Referring to Figure 3 and Figure 7The liquid crystal polymer light-adjusting layer 3 is arranged on one side of the second light-adjusting layer 2. Specifically, the liquid crystal polymer light-adjusting layer 3 includes a plurality of cholesteric liquid crystal polymer films 31 arranged at intervals, and the plurality of cholesteric liquid crystal polymer films 31 are arranged one-to-one corresponding to the plurality of second light-adjusting portions 22 of the second light-adjusting layer 2.

[0070] Referring to Figure 3 and Figure 7 The control electrode layer 4 is arranged on one side of the liquid crystal polymer light-adjusting layer 3. Specifically, the control electrode layer 4 includes a plurality of control electrodes 41 arranged one-to-one corresponding to the plurality of cholesteric liquid crystal polymer films 31 and electrically connected one-to-one. Specifically, the control electrode 41 is a transparent electrode allowing light to pass through.

[0071] The cholesteric liquid crystal polymer film 31 is configured to be capable of switching between a light-transmitting state and a light-reflecting state under the control of the control electrode 41. Specifically, the light-transmitting state refers to that the cholesteric liquid crystal polymer film 31 allows light to pass through, and specifically can be a transparent state; the light-reflecting state refers to that light incident on the surface of the cholesteric liquid crystal polymer film 31 is reflected, i.e., a reflective state.

[0072] The first light-adjusting portion 21 is configured to allow light incident thereinto to be emitted. The second light-adjusting portion 22 is configured to cooperate with the cholesteric liquid crystal polymer film 31 to enable light incident on the second light-adjusting portion 22 to be emitted from the second light-adjusting portion 22, i.e., light can be emitted from both the first light-adjusting portion 21 and the second light-adjusting portion 22, realizing a wide viewing angle mode; or the second light-adjusting portion 22 is configured to cooperate with the cholesteric liquid crystal polymer film 31 to transmit light incident on the second light-adjusting portion 22 to the first light-adjusting layer 1, i.e., the second light-adjusting portion 22 cooperates with the cholesteric liquid crystal polymer film 31 to enable light to be emitted only from the first light-adjusting portion 21, realizing a narrow viewing angle mode, i.e., a privacy mode.

[0073] It can be understood that, in the embodiments of the present application, by setting the light adjusting assembly 100 to include the first light adjusting layer 1 and the second light adjusting layer 2, and the first light adjusting layer 1 includes a plurality of first light transmitting parts 111 and second light transmitting parts 112 arranged alternately, the refractive indexes of the first light transmitting parts 111 and the second light transmitting parts 112 are different, so that the light rays are refracted at the interface between the first light transmitting parts 111 and the second light transmitting parts 112, thereby changing the transmission path of the light rays, which is conducive to improving the viewing angle; and by alternately and closely arranging the first light adjusting part 21 and the second light adjusting part 22, the refractive indexes of the first light adjusting part 21 and the second light adjusting part 22 are different, the cholesteric liquid crystal polymer film 31 is switched between the light transmitting state and the light reflecting state under the control of the control electrode 41, the first light adjusting part 21 allows the light rays incident therein to be emitted, and the light rays incident into the second light adjusting part 22 can be emitted from the second light adjusting part 22 or transmitted to the first light adjusting layer 1 in cooperation with the cholesteric liquid crystal polymer film 31, thereby realizing the switching between the wide viewing angle mode and the narrow viewing angle mode, and in the narrow viewing angle mode, i.e., the privacy mode, the light rays incident into the second light adjusting part 22 can be retransmitted to the first light adjusting layer 1, and after being re-adjusted by the first light transmitting parts 111 and the second light transmitting parts 112 of the first light adjusting layer 1, the light rays can be re-emitted from the first light adjusting part 21, thereby effectively improving the utilization rate of the light rays incident into the second light adjusting part 22. In the wide viewing angle mode and the narrow viewing angle mode, the light rays can have high transmittance, which is conducive to improving the display brightness of the display panel 300 and improving the display performance, thereby solving the problems of insufficient light utilization and low brightness of the display panel 300 in the related art.

[0074] Specifically, in some embodiments, the control electrode 41 is configured to be capable of being switched between the power-on state and the power-off state, i.e., the control electrode 41 can be controlled to change its charged state. In some embodiments, the cholesteric liquid crystal polymer film 31 described above can be switched between the light transmitting state and the light reflecting state under the control of the control electrode 41, specifically, when the control electrode 41 is in the power-on state, the cholesteric liquid crystal polymer film 31 is controlled by the control electrode 41 to be in the light reflecting state; when the control electrode 41 is in the power-off state, i.e., the control electrode 41 is not charged, the cholesteric liquid crystal polymer film 31 is in the light transmitting state. By controlling the cholesteric liquid crystal polymer film 31 to be switched between the light transmitting state and the light reflecting state through the control electrode 41, the display panel 300 can be switched between the wide viewing angle mode and the narrow viewing angle mode in cooperation with the second light adjusting part 22 of the second light adjusting layer 2, thereby meeting different use requirements of users and improving the application range of the display module 400.

[0075] In the embodiments of the present application, a separate anti-peeping film does not need to be arranged, cost is saved, the structure is simplified, and the problem that the anti-peeping film causes insufficient light transmittance, insufficient light utilization, and low brightness of the display panel 300 due to absorption of light is avoided. Meanwhile, the control voltage required by the cholesteric liquid crystal polymer film 31 is small, which is conducive to reducing power consumption.

[0076] Specifically, referring to Figure 2 , Figure 3 , Figure 6 and Figure 7 , for the display module 400 provided in the embodiments of the present application, the display panel 300 and the backlight module 200 in the first embodiment of the display module 400 and the second embodiment of the display module 400 can be the same, and the difference is only that the structure of the light adjusting assembly 100 is different.

[0077] In the first embodiment of the display module 400 and the second embodiment of the display module 400, the first light adjusting layer 1 of the light adjusting assembly 100 has the same structure, and is arranged on the side of the second light adjusting layer 2 close to the backlight module 200.

[0078] Specifically, referring to Figure 2 , Figure 3 and Figure 6 , Figure 7 , in the first embodiment of the display module 400 and the second embodiment of the display module 400, the first light adjusting layer 1 includes a first light transmitting layer 11 and a second light transmitting layer 12, the first light transmitting layer 11 includes a plurality of first light transmitting portions 111, and the second light transmitting layer 12 includes a plurality of second light transmitting portions 112. Along the first direction, the first light transmitting portions 111 and the second light transmitting portions 112 are alternately and embeddedly arranged.

[0079] Specifically, the first direction can be the length direction or the width direction of the display panel 300. For example, the first direction can be the left-right viewing angle direction of the display panel 300, or the first direction can also be the up-down viewing angle direction of the display panel 300.

[0080] In the first embodiment of the display module 400 and the second embodiment of the display module 400, the first light transmitting portions 111 and the second light transmitting portions 112 are both light transmitting materials, and the refractive indexes of the first light transmitting portions 111 and the second light transmitting portions 112 are different. It can be understood that by arranging the first light adjusting layer 1 as the first light transmitting layer 11 and the second light transmitting layer 12, and arranging the first light transmitting portions 111 and the second light transmitting portions 112 as materials with different refractive indexes, the light entering the first light adjusting layer 1 can be refracted at the interface between the first light transmitting portions 111 and the second light transmitting portions 112, effectively changing the transmission path of the light, thereby being more conducive to adjusting the transmission direction of the light, thereby being conducive to adjusting the viewing angle of the display panel 300 and improving the utilization rate of the light. Specifically, the refractive index of the second light transmitting portions 112 is greater than the refractive index of the first light transmitting portions 111, which is more conducive to expanding the viewing angle.

[0081] Specifically, in some embodiments, as shown in Figure 3 and Figure 7 the first light-transmitting part 111 is a first prism and the second light-transmitting part 112 is a second prism, and the longitudinal cross-sectional shape of the first prism and the second prism is a triangle. In a specific embodiment, the longitudinal cross-sectional shape of the first prism and the second prism is an isosceles triangle. In a specific embodiment, the top angle of the first prism is 90° and the top angle of the second prism is 90°.

[0082] Specifically, the ridge peak of the first prism is arranged towards the second light-adjusting layer 2, the ridge peak of the second prism is arranged away from the second light-adjusting layer 2, along the first direction, the plurality of first prisms and the plurality of second prisms are arranged alternately, and the first prism is embedded between two adjacent second prisms, the ridge peak of the plurality of first prisms is flush with the bottom surface of the plurality of second prisms, and the second prism is embedded between two adjacent first prisms, the ridge peak of the plurality of second prisms is flush with the bottom surface of the plurality of first prisms.

[0083] Specifically, by setting the longitudinal cross-sectional shape of the first prism and the second prism as an isosceles triangle, and the top angle of the first prism and the top angle of the second prism are both 90°, the side surface of the first prism and the second prism can be better fitted, the light can be more effectively refracted at the interface of the first prism and the second prism, thereby more effectively adjusting the transmission path of the light, and more conducive to adjusting the viewing angle of the display panel 300. Moreover, the ridge peak of the second prism is flush with the bottom surface of the plurality of first prisms, and the ridge peak of the plurality of first prisms is flush with the bottom surface of the plurality of second prisms, so that the surface of the first light-transmitting layer 11 and the surface of the second light-transmitting layer 12 are both flat, which is more conducive to light transmission, and also facilitates the arrangement of the remaining structures of the light-adjusting assembly 100, simplifying the structure.

[0084] In the first embodiment of the display module 400, as shown in Figure 2 and Figure 3 the liquid crystal polymer light-adjusting layer 3 is arranged on the side of the second light-adjusting layer 2 close to the first light-adjusting layer 1, and the control electrode layer 4 is arranged on the side of the liquid crystal polymer light-adjusting layer 3 close to the first light-adjusting layer 1. That is, the liquid crystal polymer light-adjusting layer 3 is located between the second light-adjusting part 22 of the second light-adjusting layer 2 and the control electrode layer 4, and the control electrode layer 4 is located between the liquid crystal polymer light-adjusting layer 3 and the second light-transmitting layer 12 of the first light-adjusting layer 1.

[0085] In a specific embodiment, as shown in Figure 3As shown, the surface of the second light-transmitting layer 12 away from the first light-transmitting layer 11 is a plane, and the plurality of control electrodes 41 of the control electrode layer 4 are arranged on the surface of the second light-transmitting layer 12 away from the first light-transmitting layer 11. The plurality of cholesteric liquid crystal polymer films 31 of the liquid crystal polymer light-adjusting layer 3 are arranged one by one on the surfaces of the plurality of control electrodes 41 away from the second light-transmitting layer 12. The plurality of second light-adjusting portions 22 of the second light-adjusting layer 2 are arranged one by one on the surfaces of the plurality of cholesteric liquid crystal polymer films 31 away from the second light-transmitting layer 12. The plurality of first light-adjusting portions 21 of the second light-adjusting layer 2 are arranged one by one between two adjacent second light-adjusting portions 22 and on the surface of the second light-transmitting layer 12 away from the first light-transmitting layer 11.

[0086] In the first embodiment of the display module 400, the material of the second light-adjusting portion 22 in the second light-adjusting layer 2 of the light-adjusting assembly 100 is a negative refractive index material, and the material of the first light-adjusting portion 21 is a positive refractive index material. The refractive index of the negative refractive index material is negative, and the refractive index of the positive refractive index material is positive. That is, in the first direction, the positive refractive index material and the negative refractive index material are arranged alternately and closely.

[0087] Specifically, the dielectric constant or magnetic permeability of the negative refractive index material is negative, and the material with negative refractive index has negative dielectric constant or magnetic permeability. The material with negative dielectric constant or magnetic permeability is also called double-negative material. The light wave propagates backward in such medium. The material with negative refractive index is only artificially structured material, which is composed of periodic arrangement of metal wires and non-closed metal rings. In such material, the electric field, the magnetic field and the wave vector direction comply with the "left-hand" rule, instead of the "right-hand" rule in conventional material. Therefore, the material with negative refractive index is also called left-handed material. When the light wave propagates in the left-handed material, the direction of energy flow is opposite to the direction of wave vector. When the light ray is incident on the interface between the material with positive refractive index and the material with negative refractive index, the refraction of the light wave is opposite to the conventional refraction. The incident light ray and the refracted light ray are on the same side of the normal direction of the interface (when the light ray is normally incident on the material with positive refractive index, the refracted light ray and the incident light ray are on the two sides of the normal direction).

[0088] In the present embodiment, by arranging the first light-adjusting portion 21 and the second light-adjusting portion 22 as positive refractive index material and negative refractive index material respectively, the two materials with different refractive indices are arranged alternately, so that the light ray can be negatively refracted at the interface between the first light-adjusting portion 21 and the second light-adjusting portion 22, thereby changing the original transmission path of the light ray. This is more conducive to the cooperation of the cholesteric liquid crystal polymer film 31 and the control electrode 41 to realize the switching between wide viewing angle mode and narrow viewing angle mode (privacy mode), and is also conducive to the reuse of the light ray, improves the utilization rate of the light ray, and further improves the brightness of the display panel 300.

[0089] In some embodiments, the material of the second light adjusting portion 22 comprises any one of silver-aluminum mixed material, copper crystal film combined material, and the silver-aluminum mixed material can be solid, liquid or semi-solid, and the copper crystal film combined material can be formed by growing copper crystal on a polymer material film, and the polymer material film can be polyimide or the like.

[0090] In some embodiments, the refractive index of the second light adjusting portion 22 is -1.12 to -0.92, and in a specific embodiment, the refractive index of the second light adjusting portion 22 is -1.02. By setting the refractive index of the second light adjusting portion 22 in the above range, the light can be better negatively refracted at the interface between the second light adjusting portion 22 and the first light adjusting portion 21, and the light transmission path can be more effectively changed, and the light utilization rate can be improved.

[0091] Referring to Figures 2 to 5 In a specific embodiment, the surface of the second light adjusting portion 22 adhered to the first light adjusting portion 21 is a plane, so that the light incident at the interface between the second light adjusting portion 22 and the first light adjusting portion 21 can be better negatively refracted, and the light transmission path can be more effectively changed. In a specific embodiment, the surface of the second light adjusting portion 22 adhered to the cholesteric liquid crystal polymer film 31 is a plane, so that after being adjusted by the second light adjusting portion 22, the light incident at the interface between the second light adjusting portion 22 and the cholesteric liquid crystal polymer film 31 can be better reflected or transmitted by the cholesteric liquid crystal polymer film 31, so as to be emitted from the second light adjusting portion 22 or re-enter the first light adjusting layer 1 to be utilized.

[0092] Referring to Figures 2 to 5 In a specific embodiment, the surface of the second light adjusting portion 22 away from the first light adjusting layer 1 is a plane, so as to avoid the problem that when the surface of the second light adjusting portion 22 away from the first light adjusting layer 1 is a curved surface such as an arc surface, the light negatively refracted at the curved surface is difficult to directly emit from the surface of the second light adjusting portion 22 away from the first light adjusting layer 1 when the wide viewing angle mode needs to be implemented, and the switching between the wide viewing angle mode and the narrow viewing angle mode is more convenient.

[0093] In this embodiment, referring to Figures 2 to 5The second light adjusting part 22 is configured to negatively refract the light rays incident to the second light adjusting part 22 and the light rays exiting from the second light adjusting part 22. Specifically, when the light rays are incident to the second light adjusting part 22 from the first light adjusting part 21, the negative refraction occurs at the interface between the second light adjusting part 22 and the first light adjusting part 21 and the light rays enter into the second light adjusting part 22. The light rays in the second light adjusting part 22 also negatively refract when exiting from the second light adjusting part 22, for example, the light rays in the second light adjusting part 22 are incident to the first light adjusting part 21, the negative refraction occurs at the interface between the second light adjusting part 22 and the first light adjusting part 21 and the light rays enter into the first light adjusting part 21; or, the light rays in the second light adjusting part 22 exit from the surface of the second light adjusting part 22 away from the first light adjusting layer 1, the negative refraction also occurs at the surface of the second light adjusting part 22 away from the first light adjusting layer 1; or, the light rays in the second light adjusting part 22 are incident to the cholesteric liquid crystal polymer film 31, the negative refraction occurs at the interface between the second light adjusting part 22 and the cholesteric liquid crystal polymer film 31 when the cholesteric liquid crystal polymer film 31 is in the light transmission state and the light rays enter into the cholesteric liquid crystal polymer film 31.

[0094] Referring to Figures 2 to 5 The cholesteric liquid crystal polymer film 31 is configured to reflect the light rays incident to the cholesteric liquid crystal polymer film 31 when in the light reflection state and allow the light rays incident to the cholesteric liquid crystal polymer film 31 to exit when in the light transmission state. Specifically, the surface of the cholesteric liquid crystal polymer film 31 close to the control electrode 41 and the surface of the cholesteric liquid crystal polymer film 31 away from the control electrode 41 can both reflect the light rays incident to the surface when the cholesteric liquid crystal polymer film 31 is in the light reflection state; the cholesteric liquid crystal polymer film 31 can transmit the light rays incident to the cholesteric liquid crystal polymer film 31 from the side of the first light adjusting layer 1 and the light rays incident to the cholesteric liquid crystal polymer film 31 from the side of the second light adjusting layer 2 and allow the light rays to pass through the cholesteric liquid crystal polymer film 31 when the cholesteric liquid crystal polymer film 31 is in the light reflection state.

[0095] In the first embodiment of the display module 400, in some embodiments, the refractive index of the first light adjusting part 21 is designed to be substantially the same as the refractive index of the second light transmitting part 112, and the first light adjusting part 21 and the second light transmitting part 112 can be made of the same material and have the same refractive index; the refractive index of the control electrode 41 and the cholesteric liquid crystal polymer film 31 is designed to be substantially the same as the refractive index of the second light transmitting part 112, so that the first light adjusting layer 1, the control electrode 41, the cholesteric liquid crystal polymer film 31 and the second light adjusting layer 2 can better work together to achieve light adjustment and transmission, improve light transmission rate and utilization, and thus improve the brightness of the display panel 300 and the display effect.

[0096] Specifically, in some embodiments, the material of the first light adjusting portion 21 includes borate glass, and the refractive index of the first light adjusting portion 21 is 1.67 to 1.87. In some embodiments, the material of the first light transmitting portion 111 includes silicate glass, and the refractive index of the first light transmitting portion 111 is 1.40 to 1.62. In some embodiments, the material of the second light transmitting portion 112 includes borate glass, and the refractive index of the second light transmitting portion 112 is 1.67 to 1.87. In some embodiments, the refractive index of the cholesteric liquid crystal polymer film 31 is 1.67 to 1.87, and in some embodiments, the refractive index of the control electrode 41 is 1.67 to 1.87.

[0097] It can be understood that the first light transmitting portion 111, the second light transmitting portion 112 and the first light adjusting portion 21 respectively adopt the above-mentioned materials, and the refractive indexes of the first light transmitting portion 111, the second light transmitting portion 112, the first light adjusting portion 21, the control electrode 41 and the cholesteric liquid crystal polymer film 31 are specifically set to the above-mentioned numerical ranges. On the premise of ensuring that the first light transmitting portion 111, the second light transmitting portion 112 and the first light adjusting portion 21 all have good light transmitting performance, the light can be better refracted at the interface between the first light transmitting portion 111 and the second light transmitting portion 112 or total reflection can occur at the interface, thereby being conducive to adjusting the light transmission path and the viewing angle of the display panel 300, improving the light utilization rate and improving the brightness of the display panel 300.

[0098] In a specific embodiment, the refractive index of the first light transmitting portion 111 is 1.5 to 1.52, the refractive index of the second light transmitting portion 112 is about 1.77, the refractive index of the cholesteric liquid crystal polymer film 31 is about 1.77, the refractive index of the control electrode 41 is about 1.77, and the refractive index of the first light adjusting portion 21 is about 1.77. By specifically setting the refractive indexes of the above-mentioned structures to the above-mentioned numerical values, the light transmission path and the viewing angle of the display panel 300 can be more efficiently adjusted, the light utilization rate can be more greatly improved, and the brightness of the display panel 300 can be more effectively improved.

[0099] In some embodiments, the refractive index of the first light-transmissive portion 111 is defined as n1, and the refractive index of the second light-transmissive portion 112 is defined as n2. In one specific embodiment, n2 = 1.175n1. It can be understood that, by setting the refractive index of the first light-transmissive portion 111 and the refractive index of the second light-transmissive portion 112 in the above ratio, the incident angle of the light rays that can be totally reflected at the interface between the first light-transmissive portion 111 and the second light-transmissive portion 112 is about 60°. Specifically, the light rays that are incident at the interface between the first light-transmissive portion 111 and the second light-transmissive portion 112 can all be totally reflected at the interface between the first light-transmissive portion 111 and the second light-transmissive portion 112 when the incident angle of the light rays is greater than or equal to 60°. By the above setting, the light rays that re-enter the second light-transmissive portion 112 of the first light-adjusting layer 1 after being adjusted by the second light-adjusting portion 22 can be totally reflected at the interface between the second light-transmissive portion 112 and the first light-transmissive portion 111, the transmission direction of the light rays is adjusted so that the light rays can re-enter the second light-adjusting layer 2 and exit through the first light-adjusting portion 21, thereby more favorably improving the utilization and transmission of the light rays and the brightness of the display panel 300.

[0100] In other specific embodiments, the refractive index of the first light-transmissive portion 111 and the refractive index of the second light-transmissive portion 112 can be set in other ratio, for example, n2 = 1.414n1. When the relationship is satisfied, the incident angle of the light rays that can be totally reflected at the interface between the first light-transmissive portion 111 and the second light-transmissive portion 112 is 45°. Specifically, the light rays that are incident at the interface between the first light-transmissive portion 111 and the second light-transmissive portion 112 can all be totally reflected at the interface between the first light-transmissive portion 111 and the second light-transmissive portion 112 when the incident angle of the light rays is greater than or equal to 45°, so that the light rays that re-enter the first light-adjusting layer 1 after being adjusted by the second light-adjusting portion 22 can be re-adjusted and exit, which is more favorable for improving the utilization and transmission of the light rays and the brightness of the display panel 300. In other embodiments, the specific values and ratio of the refractive index of the first light-transmissive portion 111 and the refractive index of the second light-transmissive portion 112 can be designed according to actual needs, which are not limited in the embodiments of the present application.

[0101] In the first embodiment of the display module 400, referring to Figure 4 and Figure 5 , exemplary light transmission paths of several light beams that exit the backlight module 200 in the wide viewing angle mode and the narrow viewing angle mode (privacy mode) are shown, specifically, Figure 4 and Figure 5As shown, the transmission paths of four beams of light are respectively shown, wherein the four beams of light are respectively the first beam of light L1, the second beam of light L2, the third beam of light L3 and the fourth beam of light L4. Specifically, the four beams of light are emitted from the backlight module 200 and enter the first light modulation layer 1, and then are incident on different positions of the interface between the first light transmission part 111 and the second light transmission part 112 of the first light modulation layer 1. The light rays incident on different positions correspond to different transmission paths respectively.

[0102] Specifically, since the first light modulation part 21 is a positive refractive index material and the second light modulation part 22 is a negative refractive index material, the first light modulation part 21 allows the light rays to be emitted. As shown in FIG. 2B, the first beam of light L1 is incident on the interface between the first light transmission part 111 and the second light transmission part 112, and then is refracted by the second light transmission part 112. The first beam of light L1 is directly incident on the first light modulation part 21 from the interface between the second light transmission part 112 and the first light modulation part 21, and then is emitted from the surface of the first light modulation layer 1 away from the first light modulation part 21. Figure 4 As shown, in the wide viewing angle mode, the first beam of light L1 is incident on the interface between the first light transmission part 111 and the second light transmission part 112, and then is refracted by the second light transmission part 112. The first beam of light L1 is directly incident on the first light modulation part 21 from the interface between the second light transmission part 112 and the first light modulation part 21, and then is emitted from the surface of the first light modulation layer 1 away from the first light modulation part 21. Since the materials and refractive indexes of the first light modulation part 21 and the second light transmission part 112 are substantially the same, the refraction of the light rays at the interface between the second light transmission part 112 and the first light modulation part 21 can be ignored.

[0103] The second beam of light L2 is incident on the interface between the first light transmission part 111 and the second light transmission part 112, and then is refracted by the second light transmission part 112. The second beam of light L2 is incident on the first light modulation part 21 from the interface between the control electrode 41 and the first light modulation part 21, and then is emitted from the surface of the first light modulation layer 1 away from the first light modulation part 21 and is incident on the display panel 300. Since the refractive indexes of the control electrode 41, the first light modulation part 21 and the second light transmission part 112 are substantially the same, the refraction of the light rays at the interface between the control electrode 41 and the second light transmission part 112 and at the interface between the control electrode 41 and the first light modulation part 21 can be ignored.

[0104] The third light beam L3 is emitted towards the right side, and is incident at the interface between the first light-transmitting portion 111 and the second light-transmitting portion 112. After being refracted by the second light-transmitting portion 112, the third light beam L3 is directly incident into the first light-adjusting portion 21 from the interface between the second light-transmitting portion 112 and the first light-adjusting portion 21, and is transmitted through the first light-adjusting portion 21. After being incident at the interface between the first light-adjusting portion 21 and the second light-adjusting portion 22, the third light beam L3 is negatively refracted and enters into the second light-adjusting portion 22. Then, the third light beam L3 is reincident at the interface between the cholesteric liquid crystal polymer film 31 and the second light-adjusting portion 22. Since the control electrode 41 is in the energized state in the wide viewing angle mode, the control electrode 41 is charged, and the cholesteric liquid crystal polymer film 31 is in the light-reflecting state. After being incident on the surface of the cholesteric liquid crystal polymer film 31, the third light beam L3 is reflected by the cholesteric liquid crystal polymer film 31, and is reincident on the surface of the second light-adjusting portion 22 away from the first light-adjusting layer 1. The third light beam L3 is negatively refracted at the surface of the second light-adjusting portion 22 away from the first light-adjusting layer 1, and is emitted and incident on the display panel 300.

[0105] The fourth light beam L4 is emitted towards the left side, and is incident at the interface between the first light-transmitting portion 111 and the second light-transmitting portion 112. After being refracted by the second light-transmitting portion 112, the fourth light beam L4 is directly incident into the first light-adjusting portion 21 from the interface between the second light-transmitting portion 112 and the first light-adjusting portion 21, and is transmitted through the first light-adjusting portion 21. After being incident at the interface between the first light-adjusting portion 21 and the second light-adjusting portion 22, the fourth light beam L4 is negatively refracted and enters into the second light-adjusting portion 22. Then, the fourth light beam L4 is reincident at the interface between the cholesteric liquid crystal polymer film 31 and the second light-adjusting portion 22. Since the control electrode 41 is in the energized state in the wide viewing angle mode, the control electrode 41 is charged, and the cholesteric liquid crystal polymer film 31 is in the light-reflecting state. After being incident on the surface of the cholesteric liquid crystal polymer film 31, the fourth light beam L4 is reflected by the cholesteric liquid crystal polymer film 31, and is reincident on the surface of the second light-adjusting portion 22 away from the first light-adjusting layer 1. The fourth light beam L4 is negatively refracted at the surface of the second light-adjusting portion 22 away from the first light-adjusting layer 1, and is emitted and incident on the display panel 300.

[0106] That is, in the wide viewing angle mode, the light beams incident into the first light-adjusting portion 21 can be emitted directly, and the light beams in the second light-adjusting portion 22 can be emitted directly after being reflected by the cholesteric liquid crystal polymer film 31. Therefore, the light beams in the first light-adjusting portion 21 and the second light-adjusting portion 22 can be emitted, so that the display module 400 can realize the wide viewing angle display mode.

[0107] In the narrow viewing angle mode, as shown in FIG. 6, the control electrode 41 is in the de-energized state, the control electrode 41 is not charged, and the cholesteric liquid crystal polymer film 31 is in the light-transmitting state. Figure 5As shown, the first light beam L1 is incident to the interface between the first light-transmitting portion 111 and the second light-transmitting portion 112, refracts through the second light-transmitting portion 112, and is directly incident to the first light-adjusting portion 21 from the interface between the second light-transmitting portion 112 and the first light-adjusting portion 21. The first light beam L1 incident to the first light-adjusting portion 21 is not incident to the interface between the first light-adjusting portion 21 and the second light-adjusting portion 22 again, and can be directly emitted from the surface of the first light-adjusting layer 1 away from the first light-adjusting portion 21 and incident to the display panel 300. Since the material and the refractive index of the first light-adjusting portion 21 and the second light-transmitting portion 112 are substantially the same, the refraction of the light at the interface between the second light-transmitting portion 112 and the first light-adjusting portion 21 can be ignored.

[0108] The second light beam L2 is incident to the interface between the first light-transmitting portion 111 and the second light-transmitting portion 112 on the other side, refracts through the second light-transmitting portion 112, enters the control electrode 41 through the interface between the second light-transmitting portion 112 and the control electrode 41. Since the control electrode 41 is in a de-energized state in the narrow viewing angle mode, the control electrode 41 is not charged, and the cholesteric liquid crystal polymer film 31 is in a light-transmitting state, the second light beam L2 can enter the cholesteric liquid crystal polymer film 31 and be incident to the interface between the cholesteric liquid crystal polymer film 31 and the second light-adjusting portion 22. Negative refraction occurs at the interface, and the second light beam L2 enters the second light-adjusting portion 22. After being transmitted through the second light-adjusting portion 22, the second light beam L2 is incident to the interface between the second light-adjusting portion 22 and the first light-adjusting portion 21 again. Negative refraction occurs at the interface, and the second light beam L2 enters the first light-adjusting portion 21. After being transmitted through the first light-adjusting portion 21, the second light beam L2 enters the second light-transmitting portion 112 through the interface between the first light-adjusting portion 21 and the second light-transmitting portion 112, and is reused in the first light-adjusting layer 1.

[0109] The third light beam L3 is incident to the interface between the first light-transmitting portion 111 and the second light-transmitting portion 112 on the one side, refracts through the second light-transmitting portion 112, and is directly incident to the first light-adjusting portion 21 from the interface between the second light-transmitting portion 112 and the first light-adjusting portion 21. After being transmitted through the first light-adjusting portion 21, the third light beam L3 is incident to the interface between the first light-adjusting portion 21 and the second light-adjusting portion 22. Negative refraction occurs at the interface, and the third light beam L3 enters the second light-adjusting portion 22. After being transmitted through the second light-adjusting portion 22, the third light beam L3 is incident to the interface between the first light-adjusting portion 21 and the second light-adjusting portion 22 again. Negative refraction occurs at the interface, and the third light beam L3 enters the first light-adjusting portion 21. The third light beam L3 incident to the first light-adjusting portion 21 is not incident to the interface between the first light-adjusting portion 21 and the second light-adjusting portion 22 again, and can be directly emitted from the surface of the first light-adjusting layer 1 away from the first light-adjusting portion 21.

[0110] The fourth light beam L4 is incident at the interface between the first light-transmitting portion 111 and the second light-transmitting portion 112, refracts through the second light-transmitting portion 112, and is directly incident into the first light-adjusting portion 21 from the interface between the second light-transmitting portion 112 and the first light-adjusting portion 21, and is transmitted through the first light-adjusting portion 21, and is incident at the interface between the first light-adjusting portion 21 and the second light-adjusting portion 22, negatively refracts at the interface, and enters into the second light-adjusting portion 22, and is incident again at the interface between the cholesteric liquid crystal polymer film 31 and the second light-adjusting portion 22. After the fourth light beam L4 is incident at the interface between the cholesteric liquid crystal polymer film 31 and the second light-adjusting portion 22, in the narrow viewing angle mode, the control electrode 41 is in the off state, the control electrode 41 is not charged, the cholesteric liquid crystal polymer film 31 is in the light-transmitting state, the fourth light beam L4 negatively refracts at the interface and enters into the cholesteric liquid crystal polymer film 31, and reenters into the second light-transmitting portion 112 after passing through the cholesteric liquid crystal polymer film 31 and the control electrode 41, and the fourth light beam L4 reenters into the second light-transmitting portion 112, and is incident again at the interface between the second light-transmitting portion 112 and the first light-transmitting portion 111, and is reflected twice at the interface between the second light-transmitting portion 112 and the first light-transmitting portion 111, and reenters into the first light-adjusting portion 21 from the interface between the second light-transmitting portion 112 and the first light-adjusting portion 21, and is transmitted through the first light-adjusting portion 21, and is directly emitted from the surface of the first light-adjusting layer 1 away from the first light-adjusting layer 1, and is incident on the display panel 300.

[0111] That is, in the narrow viewing angle mode, the light beam incident on the second light-adjusting layer 2 can only be emitted from the first light-adjusting portion 21, and the light beam incident on the second light-adjusting portion 22 cannot be directly emitted from the second light-adjusting portion 22, but can be transmitted by the cholesteric liquid crystal polymer film 31 to reenter into the first light-adjusting layer 1, and reenter into the first light-adjusting portion 21 after being adjusted by the first light-transmitting portion 111 and the second light-transmitting portion 112 in the first light-adjusting layer 1, and is finally emitted from the first light-adjusting portion 21. While realizing the narrow viewing angle mode, i.e., the anti-peep mode, the light utilization rate is effectively improved, the light transmittance is improved, and the brightness of the display panel 300 is improved, which is beneficial to improving the performance of the display module 400.

[0112] Referring to Figures 6 to 9 In the second embodiment of the display module 400, the structure of the light-adjusting assembly 100 is different from that in the first embodiment of the display module 400. Specifically, referring to Figure 7In this embodiment, both the second dimming unit 22 and the first dimming unit 21 are made of materials with a positive refractive index. The liquid crystal polymer dimming layer 3 is disposed on the surface of the second dimming unit 22 facing away from the first dimming layer 1, and the control electrode layer 4 is disposed on the side of the liquid crystal polymer dimming layer 3 facing away from the first dimming layer 1. The cholesteric liquid crystal polymer film 31 is configured to reflect light incident on the cholesteric liquid crystal polymer film 31 when in a reflective state and to allow light incident on the cholesteric liquid crystal polymer film 31 to escape when in a transmissive state. Specifically, in this embodiment, the surface of the second dimming unit 22 facing away from the first dimming layer 1 is a curved surface, convexly protruding toward the liquid crystal polymer dimming layer 3. Correspondingly, the surface of the liquid crystal polymer dimming layer 3 facing the first dimming layer 1 is a concave surface.

[0113] In this embodiment, the surface of the second dimming unit 22 away from the first dimming layer 1 is set as a convex surface protruding toward the liquid crystal polymer dimming layer 3, and the cholesteric liquid crystal polymer film 31 is set on the surface, and a concave surface is formed at the interface. Figure 9 As shown, when the cholesteric liquid crystal polymer film 31 is in the reflective state, it can reflect light incident from the second dimming part 22 to the cholesteric liquid crystal polymer film 31. Since the cholesteric liquid crystal polymer film 31 is an inner concave surface at the interface, the light can re-enter the first dimming layer 1 after multiple reflections on the surface of the cholesteric liquid crystal polymer film 31, and after multiple total reflections at the interface between the first light-transmitting part 111 and the second light-transmitting part 112 of the first dimming layer 1, it can re-enter the first dimming part 21 from the interface between the second light-transmitting part 112 and the first dimming part 21, and directly exit from the surface of the first dimming part 21 away from the first dimming layer 1. That is, when the cholesteric liquid crystal polymer film 31 is in a reflective state, light cannot be directly emitted from the second dimming unit 22 and the cholesteric liquid crystal polymer film 31 to the display panel 300, but can only be emitted from the first dimming unit 21, thereby achieving a narrow viewing angle, i.e., anti-peeping display, and the light in the second dimming unit 22 can be reflected into the first dimming layer 1, and after being readjusted and utilized, it is emitted from the first dimming unit 21, thereby improving the light utilization rate and being beneficial to improving the brightness of the display panel 300.

[0114] like Figure 8As shown, when the cholesteric liquid crystal polymer film 31 is in the light transmission state, the light rays incident to the first light adjusting portion 21 can be emitted directly, and the light rays incident to the interface between the first light adjusting portion 21 and the second light adjusting portion 22 can enter the second light adjusting portion 22 after refraction, and the light rays in the second light adjusting portion 22 can be emitted to the cholesteric liquid crystal polymer film 31 through the surface of the second light adjusting portion 22 away from the first light adjusting layer 1, and then emitted through the cholesteric liquid crystal polymer film 31 and the control electrode 41. That is, when the cholesteric liquid crystal polymer film 31 is in the light transmission state, light rays can be emitted to the display panel 300 from the positions of the first light adjusting portion 21 and the second light adjusting portion 22, thereby realizing a wide viewing angle display mode.

[0115] In the second embodiment of the display module 400, the refractive index of the first light adjusting portion 21 is substantially the same as that of the second light transmitting portion 112, and the refractive index of the second light adjusting portion 22, the control electrode 41, and the cholesteric liquid crystal polymer film 31 is substantially the same as that of the first light transmitting portion 111. The first light adjusting portion 21 and the second light transmitting portion 112 can be set to have the same refractive index, and the second light adjusting portion 22, the control electrode 41, the cholesteric liquid crystal polymer film 31, and the first light transmitting portion 111 can be set to have the same refractive index, so that the first light adjusting layer 1, the second light adjusting layer 2, the cholesteric liquid crystal polymer film 31, and the control electrode 41 can jointly adjust and transmit light rays, thereby improving the light transmittance and utilization, and further improving the brightness and display effect of the display panel 300.

[0116] Specifically, in some embodiments, the material of the second light adjusting portion 22 includes silicate glass, and the refractive index of the second light adjusting portion 22 is 1.40 to 1.62. In some embodiments, the material of the first light adjusting portion 21 includes borate glass, and the refractive index of the first light adjusting portion 21 is 1.9 to 2.2. In some embodiments, the material of the first light transmitting portion 111 includes silicate glass, and the refractive index of the first light transmitting portion 111 is 1.40 to 1.62. In some embodiments, the material of the second light transmitting portion 112 includes borate glass, and the refractive index of the second light transmitting portion 112 is 1.9 to 2.2. In some embodiments, the refractive index of the cholesteric liquid crystal polymer film 31 is 1.40 to 1.62, and in some embodiments, the refractive index of the control electrode 41 is 1.40 to 1.62.

[0117] It can be understood that the first light-transmitting portion 111, the second light-transmitting portion 112, the first light-adjusting portion 21, and the second light-adjusting portion 22 are made of the above-mentioned materials, and the refractive indexes of the first light-transmitting portion 111, the second light-transmitting portion 112, the first light-adjusting portion 21, the second light-adjusting portion 22, the control electrode 41, and the cholesteric liquid crystal polymer film 31 are set to the above-mentioned values. In this way, the light can be refracted or totally reflected at the interface between the first light-transmitting portion 111 and the second light-transmitting portion 112, so as to be more conducive to adjusting the light transmission path and the viewing angle of the display panel 300, improving the light utilization rate, and improving the brightness of the display panel 300.

[0118] In a specific embodiment, the refractive index of the first light-transmitting portion 111 is 1.5 to 1.52, the refractive index of the second light-adjusting portion 22 is 1.5 to 1.52, the refractive index of the cholesteric liquid crystal polymer film 31 is 1.5 to 1.52, the refractive index of the control electrode 41 is 1.5 to 1.52, the refractive index of the second light-transmitting portion 112 is about 2.1, and the refractive index of the first light-adjusting portion 21 is about 2.1. By setting the refractive indexes of the above-mentioned structures to the above-mentioned values, the light transmission path and the viewing angle of the display panel 300 can be more efficiently adjusted, the light utilization rate can be more greatly improved, and the brightness of the display panel 300 can be more effectively improved.

[0119] In the second embodiment of the display module 400, referring to Figure 7 In some embodiments, the light-adjusting assembly 100 further comprises a microstructure layer 5, which is arranged between the first light-adjusting layer 1 and the second light-adjusting layer 2. Specifically, the microstructure layer 5 comprises a plurality of microstructure groups 51, and each microstructure group 51 is arranged corresponding to one second light-adjusting portion 22.

[0120] Specifically, as shown in Figure 7 Each microstructure group 51 comprises a plurality of micro-prisms arranged in close proximity. The surface of the micro-prism close to the second light-adjusting portion 22 is a conical surface, which is a convex surface protruding towards the second light-adjusting portion 22. In some embodiments, the refractive index of the conical surface gradually increases from the side close to the first light-adjusting layer 1 to the side away from the first light-adjusting layer 1. Alternatively, in some embodiments, the refractive index of the conical surface gradually increases from the center to the edge of the micro-prism in the radial direction. It can be understood that the surface of the micro-prism close to the second light-adjusting portion 22 is arranged as a conical surface, and the refractive index of the conical surface is arranged to gradually increase, which can be used to convert the light incident on the conical surface of the micro-prism into near-collimated light.

[0121] Specifically, as shown in Figure 9As shown, in the narrow viewing angle mode, the light reflected by the interface between the second light adjusting part 22 and the cholesteric liquid crystal polymer film 31 is incident on the conical surface of the microprism in the microstructure layer 5, and after the action of the conical surface of the microstructure layer 5, the light can be emitted from the gap between the adjacent two microprisms of the microstructure group 51 to convert the light into near-collimated light and re-enter the first light adjusting part 21 at the interface between the first light transmitting part 111 and the second light transmitting part 112 of the first light adjusting layer 1. After total reflection at the interface, the light re-enters the first light adjusting part 21. Specifically, the light re-entering the first light adjusting part 21 is near-collimated light, which can meet more use requirements and further improve the brightness of the display panel 300.

[0122] In the present embodiment, by providing the microstructure layer 5 and specifically configuring the microprism as described above, the light is reused to effectively improve the light utilization rate, and the application range of the light adjusting assembly 100 is further expanded, which can meet different use requirements.

[0123] In other embodiments, the light adjusting assembly 100 can also not be provided with the microstructure layer 5, as long as the light can be adjusted so that the display panel 300 can switch between the wide viewing angle mode and the narrow viewing angle mode (privacy mode), and the light can be reused to improve the light utilization rate and the brightness of the display panel 300.

[0124] The above description is only an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.

Claims

1. A dimming component, applied to a display module, characterized in that: include: The first light-adjusting layer includes a first light-transmitting layer and a second light-transmitting layer, wherein the first light-transmitting layer includes a plurality of first light-transmitting portions, and the second light-transmitting layer includes a plurality of second light-transmitting portions; Along a first direction, the first light-transmitting portions and the second light-transmitting portions are alternately and interlocked; the first light-transmitting portions and the second light-transmitting portions have different refractive indices; wherein the first direction is a length direction or a width direction of a display panel of the display module; A second dimming layer is provided on one side of the first dimming layer; the layer comprises a plurality of first dimming sections and a plurality of second dimming sections, wherein the first dimming sections and the second dimming sections are alternately and closely arranged along a first direction; the first dimming sections and the second dimming sections have different refractive indices; a liquid crystal polymer dimming layer, disposed on one side of the second dimming layer, comprising a plurality of cholesteric liquid crystal polymer films arranged at intervals, wherein the plurality of cholesteric liquid crystal polymer films are arranged in a one-to-one correspondence with the plurality of second dimming units; A control electrode layer is provided on one side of the liquid crystal polymer dimming layer and includes a plurality of control electrodes; the plurality of control electrodes are electrically connected to the plurality of cholesteric liquid crystal polymer films in a one-to-one correspondence; Wherein, the cholesteric liquid crystal polymer film is configured to be switchable between a light-transmitting state and a light-reflecting state under the control of the control electrode; The first dimming unit is configured to allow light incident therein to be emitted; the second dimming unit is configured to cooperate with the cholesteric liquid crystal polymer film so that the light incident on the second dimming unit can be emitted from the second dimming unit, or the light incident on the second dimming unit is transmitted to the first dimming layer.

2. The dimming component according to claim 1, characterized in that: The control electrode is configured to be switchable between a power-on state and a power-off state; when the control electrode is in the power-on state, the cholesteric liquid crystal polymer film is in a reflective state; when the control electrode is in the power-off state, the cholesteric liquid crystal polymer film is in a transmissive state.

3. The dimming component according to claim 2, characterized in that: The material of the second light modulating part is a negative refractive index material, and the material of the first light modulating part is a positive refractive index material; The liquid crystal polymer dimming layer is arranged on a side of the second dimming layer close to the first dimming layer; the control electrode layer is arranged on a side of the liquid crystal polymer dimming layer close to the first dimming layer.

4. The dimming component according to claim 3, characterized in that: The surface of the second dimming portion attached to the first dimming portion is a plane, the surface of the second dimming portion attached to the cholesteric liquid crystal polymer film is a plane, and the surface of the second dimming portion away from the first dimming layer is a plane; The second light modulator is configured to negatively refract the light incident on the second light modulator and the light emitted from the second light modulator; The cholesteric liquid crystal polymer film is configured to reflect light incident on the cholesteric liquid crystal polymer film when in a light-reflecting state, and to allow light incident on the cholesteric liquid crystal polymer film to exit when in a light-transmitting state.

5. The dimming component according to claim 3, characterized in that: The material of the second dimming unit includes any one of a silver-aluminum mixed material and a copper crystal film combined material; and / or, The first dimming unit is made of borate glass.

6. The dimming component according to claim 3, characterized in that: The refractive index of the second light modulating part is -1.12 to -0.92; the refractive index of the first light modulating part is 1.67 to 1.87; and / or, The material of the first light-transmitting portion includes silicate glass; and / or, The refractive index of the first light-transmitting portion is 1.40 to 1.62; and / or, The material of the second light-transmitting portion includes borate glass; and / or, The refractive index of the second light-transmitting portion is 1.67 to 1.87; and / or, The refractive index of the cholesteric liquid crystal polymer film is 1.67 to 1.87; and / or, The refractive index of the control electrode is 1.67 to 1.

87.

7. The dimming component according to claim 2, characterized in that: The second light modulating unit and the first light modulating unit are both made of positive refractive index materials; The liquid crystal polymer dimming layer is provided on a surface of the second dimming portion away from the first dimming layer, the surface of the second dimming portion away from the first dimming layer is a curved surface, and the curved surface is a convex surface protruding toward a side of the liquid crystal polymer dimming layer; The control electrode layer is arranged on a side of the liquid crystal polymer dimming layer away from the first dimming layer; The cholesteric liquid crystal polymer film is configured to reflect light incident on the cholesteric liquid crystal polymer film when in a light-reflecting state, and to allow light incident on the cholesteric liquid crystal polymer film to exit when in a light-transmitting state.

8. The dimming component according to claim 7, characterized in that: The material of the second dimming part includes silicate glass; and / or the refractive index of the second dimming part is 1.40 to 1.62; and / or, The material of the first dimming unit includes borate glass; and / or the refractive index of the first dimming unit is 1.9 to 2.2; and / or, The material of the first light-transmitting portion includes silicate glass; and / or the refractive index of the first light-transmitting portion is 1.40 to 1.62; and / or, The material of the second light-transmitting portion includes a cerium oxide coating; and / or the refractive index of the second light-transmitting portion is 1.9 to 2.2; and / or, The refractive index of the cholesteric liquid crystal polymer film is 1.40 to 1.62; and / or, The refractive index of the control electrode is 1.40 to 1.

62.

9. The dimming component according to claim 7, characterized in that: The dimming component further includes a microstructure layer, which is arranged between the first dimming layer and the second dimming layer and includes a plurality of microstructure groups, and the plurality of microstructure groups are arranged in a one-to-one correspondence with the plurality of second dimming parts; Each of the microstructure groups includes a plurality of closely adjacent microprisms, wherein the surface of the microprism close to the second light modulating portion is a conical surface, and the conical surface is a convex surface protruding toward one side of the second light modulating portion; The refractive index of the conical surface gradually increases from the side of the conical surface close to the first dimming layer to the side away from the first dimming layer; or, in the radial direction of the microprism, the refractive index of the conical surface gradually increases from the center to the edge of the conical surface.

10. The dimming component according to any one of claims 1 to 9, characterized in that: The first light-transmitting portion is a first prism, and the second light-transmitting portion is a second prism. The prism peaks of the first prisms are arranged toward the second dimming layer, and the prism peaks of the second prisms are arranged away from the second dimming layer. The first prism is embedded between two adjacent second prisms, and the prism peaks of the first prisms are flush with the bottom surfaces of the second prisms, and the prism peaks of the second prisms are flush with the bottom surfaces of the first prisms. And / or, the vertex angle of the first prism is 90°, and the vertex angle of the second prism is 90°.

11. A display module, characterized in that: include: Display panel; A backlight module, disposed on one side of the display panel, for providing a backlight source for the display panel; The dimming component according to any one of claims 1 to 10; the dimming component is arranged on a side of the display panel close to the backlight module, and the first dimming layer is located on a side of the second dimming layer close to the backlight module; the dimming component is configured to enable the display module to switch between an anti-peep mode and a wide-viewing angle mode.

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