Partition display system and method based on polarization body holographic grating

Abstract

The invention discloses a partition display system and method based on a polarization body holographic grating, and belongs to the technical field of display, and the system comprises a light source layer, a collimation optical layer, an electric control light diffusion layer, a polarization body holographic grating array layer and a liquid crystal display layer which are sequentially arranged from bottom to top; the light source layer can independently generate left-hand circularly polarized light and right-hand circularly polarized light; the collimating optical layer can convert light emitted by the light source layer into collimated light beams; the electric control light scattering layer has a transparent mode and a scattering mode which can be switched; the polarization body holographic grating array layer is formed by alternately arranging left-hand circular polarization gratings and right-hand circular polarization gratings; when the electric control light scattering layer is in a transparent mode, the liquid crystal display layer only performs rendering display on an area through which refracted light of the polarization body holographic grating array layer passes; and when the electric control light scattering layer is in a scattering mode, the liquid crystal display layer renders and displays all areas through which light passes. The invention has the advantages of high luminous efficiency utilization rate, low visual area crosstalk, ultra-thinness and the like.

Description

Technical Field

[0001] The present invention belongs to the field of display technology, and relates to a partition display system, and in particular to a partition display system and method based on a polarization body holographic grating. Background Art

[0002] In the field of modern display technology, with the rapid development of science and technology and the increasing diversification of user needs, traditional display technology faces many challenges and limitations.

[0003] From early cathode ray tube (CRT) displays to the widely used liquid crystal displays (LCD) and organic light-emitting diode (OLED) displays today, the development of display devices has gone through a long process. However, most of these traditional display technologies only focus on improving the basic performance indicators such as screen resolution, contrast, and color saturation to enhance the clarity and realism of the visual experience. For example, high-resolution displays can present more delicate images, allowing users to get better results when watching high-definition videos or processing fine images; high contrast can enhance the layering of the picture, making the bright parts brighter and the dark parts darker, making the image more vivid.

[0004] However, in some special application scenarios, relying solely on a traditional single display mode is far from meeting the needs. For example, in the surgical navigation system in the medical field, surgeons need to observe different medical imaging data of patients (such as CT scan images and real-time ultrasound images) at the same time, and these data may need to be displayed from different perspectives or with different focuses. Traditional displays cannot clearly partition and display these different types of information on the same screen, which may cause doctors to frequently switch between different display devices or interfaces during surgery, increasing the complexity and risk of surgery.

[0005] In the field of education, especially in remote collaborative learning or multidisciplinary teaching scenarios, teachers may need to display different teaching materials at the same time, such as text materials, video explanations, and real-time experimental demonstrations. Displays with a single display mode are difficult to meet the needs of presenting multiple contents to students at the same time, affecting teaching efficiency and quality.

[0006] In the field of industrial control, operators need to monitor the operating parameters and status information of multiple devices at the same time. This information may include data such as temperature, pressure, flow, and real-time operation images of the equipment. Traditional display methods cannot effectively partition these different types of data and images, which may make it difficult for operators to quickly and accurately obtain key information, thereby affecting the control and decision-making of the industrial production process.

[0007] In addition, in emerging technology fields such as virtual reality (VR) and augmented reality (AR), the requirements for display devices are more complex. In these applications, the real world and virtual information need to be presented simultaneously within the user's field of view, and real-time adjustments need to be made based on the user's perspective and interactive actions. The single display mode of traditional display technology cannot meet the complex requirements of integrating real and virtual content and performing partitioned display, which limits the further development and application of these emerging technologies.

[0008] In summary, developing a partitioned display system that can break through the traditional single display mode and realize multiple display modes (such as left-rotation display mode, right-rotation display mode and shared display mode) is of vital importance to meeting the needs of modern diversified application scenarios. Summary of the invention

[0009] The present invention provides a partition display system and method based on a polarization body holographic grating to overcome the defects of the prior art.

[0010] To achieve the above object, the present invention adopts the following technical solutions:

[0011] In the first aspect, the present invention provides a partitioned display system based on a polarizer holographic grating, comprising a light source layer, a collimating optical layer, an electrically controlled scattering layer, a polarizer holographic grating (PVG) array layer and a liquid crystal display layer, which are arranged in sequence from bottom to top; the light source layer can independently generate left-handed circularly polarized light and right-handed circularly polarized light; the collimating optical layer can convert the light emitted by the light source layer into a collimated light beam; the electrically controlled scattering layer has a transparent mode and a scattering mode, which can be switched; the polarizer holographic grating array layer is alternately arranged with left-handed circular polarization gratings and right-handed circular polarization gratings; when the electrically controlled scattering layer is in the transparent mode, the liquid crystal display layer only renders and displays the area through which the refracted light of the polarizer holographic grating array layer passes; when the electrically controlled scattering layer is in the scattering mode, the liquid crystal display layer renders and displays all areas through which the light passes.

[0012] Based on the selectivity of the polarization holographic grating array layer for left-handed circularly polarized light and right-handed circularly polarized light, this system directionally controls the incident collimated light beam to achieve multi-viewing zone display; and changes the direction of the incident light through the electrically controlled scattering layer to achieve a shared viewing zone mode.

[0013] Furthermore, the light source layer is a MicroLED lamp bead array based on cadmium sulfide (CdS) or cadmium selenide (CdSe) quantum dots, which utilizes the spin-orbit coupling quantum mechanical effect of quantum dots to independently generate left-handed circularly polarized light and right-handed circularly polarized light.

[0014] Furthermore, the lamp beads in the MicroLED lamp bead array are arranged at equal intervals on the same plane; in the horizontal direction, two lamp beads form a lamp bead cycle, which emit left-handed circularly polarized light and right-handed circularly polarized light respectively.

[0015] Furthermore, the collimating optical layer is a lens array.

[0016] Furthermore, the interval between the collimating optical layer and the light source layer is the back focal length of the lens array, and the horizontal section width of a single lens in the lens array is equal to the lamp bead period.

[0017] Furthermore, the electrically controlled light scattering layer is polymer dispersed liquid crystal (PDLC); when an electric field is applied to both sides of the polymer dispersed liquid crystal, it is in a transparent mode; when the electric field is removed, it is in a scattering mode.

[0018] Furthermore, in the polarizer holographic grating array layer, the sizes of the left-handed circular polarization grating and the right-handed circular polarization grating are equal, and the horizontal section width of a single circular polarization grating is not less than 1 / 2 of the section width of a single lens in the collimating optical layer.

[0019] In a second aspect, the present invention provides a display method of the above-mentioned partition display system based on polarization volume holographic grating: the system includes three display modes, namely left-handed display mode, right-handed display mode and shared display mode;

[0020] When the electrically controlled light scattering layer is in the transparent mode, the light source layer emits left-handed circularly polarized light, and the system operates in a left-handed display mode to form a left-handed display area; when the light source layer emits right-handed circularly polarized light, the system operates in a right-handed display mode to form a right-handed display area; specifically, the system can operate in a left-handed display mode or a right-handed display mode alone, that is, form a left-handed display area or a right-handed display area alone, or can also alternately operate the left-handed display mode and the right-handed display mode by time division multiplexing, and simultaneously form a left-handed display area and a right-handed display area under high refresh rate conditions;

[0021] When the electrically controlled light scattering layer is in the scattering mode, the light source layer emits left-handed circularly polarized light and right-handed circularly polarized light, and the system runs in the shared display mode to form a shared display area.

[0022] Furthermore, the display method of the left-handed display mode is as follows: the left-handed circularly polarized light emitted by the light source layer becomes a collimated light beam after passing through the collimating optical layer; when passing through the polarizer holographic grating array layer, the left-handed circularly polarized incident light is directionally refracted by the left-handed circularly polarized grating, and the refracted light passes through the LA area of ​​the liquid crystal display layer, and the liquid crystal display layer displays content LAD in the LA area, forming a left-handed display area; the right-handed circularly polarized grating does not change the propagation direction of the left-handed circularly polarized incident light, and the direct light passes through the LB area of ​​the liquid crystal display layer, and the liquid crystal display layer does not display any content in the LB area;

[0023] The display method of the right-handed display mode is as follows: the right-handed circularly polarized light emitted by the light source layer becomes a collimated light beam after passing through the collimating optical layer; when passing through the polarizer holographic grating array layer, the right-handed circularly polarized grating directionally refracts the right-handed circularly polarized incident light, and the refracted light passes through the RA area of ​​the liquid crystal display layer, and the liquid crystal display layer displays content RAD in the RA area, forming a right-handed display area; the left-handed circularly polarized grating does not change the propagation direction of the right-handed circularly polarized incident light, and the direct light passes through the RB area of ​​the liquid crystal display layer, and the liquid crystal display layer does not display any content in the RB area.

[0024] Furthermore, the display method of the shared display mode is as follows: the left-handed circularly polarized light and the right-handed circularly polarized light emitted by the light source layer become collimated light beams after passing through the collimating optical layer; and then after passing through the electrically controlled light scattering layer of the scattering mode, both collimated light beams become diffuse light beams; when the diffuse light beams pass through the polarizer holographic grating array layer, no directional refraction occurs; and after passing through the liquid crystal display layer, a shared display area is formed.

[0025] The beneficial effects of the present invention are:

[0026] 1. Multi-function display: The partition display system of the present invention can realize left-hand display mode, right-hand display mode and shared display mode, which can meet the needs of simultaneous display of different contents in various complex application scenarios, such as applications in medical, industrial, educational and emerging technology fields, and improve the adaptability and practicality of display devices.

[0027] 2. High contrast and precise display: By utilizing the spin-orbit coupling effect of quantum dots to generate specific polarized light, combined with the directional refraction of the polarized holographic grating, high-contrast partitioned display is achieved. The content of different display areas is displayed accurately, crosstalk is reduced, and display quality is improved.

[0028] 3. Flexibility of electronically controlled adjustment: The transparent mode and scattering mode of the electronically controlled light-scattering layer can be controlled by an electric field, which makes it easy to switch between different display modes. The operation is simple and flexible, and users can quickly adjust the display status according to actual needs.

[0029] 4. Innovative optical structure: The unique optical layer design in the system, including quantum dot MicroLED light source, special collimation optical layer, electrically controlled scattering layer and polarized holographic grating array, provides an innovative solution for display technology and promotes technological development in the display field. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic structural diagram of a partition display system based on a polarization volume holographic grating of the present invention;

[0031] Figure 2 It is a schematic diagram of the left-handed display mode of the partition display system based on the polarization volume holographic grating of the present invention;

[0032] Figure 3 It is a schematic diagram of the right-handed display mode of the partitioned display system based on the polarization volume holographic grating of the present invention;

[0033] Figure 4 It is a schematic diagram of a shared display mode of a partitioned display system based on a polarization volume holographic grating of the present invention;

[0034] Figure 5 It is a pixel lighting method in the left-handed display mode of the partition display system based on the polarization body holographic grating of the present invention;

[0035] Figure 6 It is a split-screen display diagram of the vehicle-mounted system. DETAILED DESCRIPTION

[0036] The specific implementation of the present invention is described below with reference to the accompanying drawings.

[0037] like Figure 1 As shown, the present invention provides a partition display system based on a polarizer holographic grating, comprising a light source layer 1, a collimating optical layer 2, an electrically controlled light scattering layer 3, a polarizer holographic grating array layer 4 and a liquid crystal display layer 5 which are arranged in sequence from bottom to top.

[0038] The light source layer 1 can independently generate left-handed circularly polarized light and right-handed circularly polarized light.

[0039] Specifically, the light source layer 1 is a MicroLED lamp bead array based on cadmium sulfide or cadmium selenide quantum dots, which utilizes the spin-orbit coupling quantum mechanical effect of quantum dots to independently generate left-handed circularly polarized light and right-handed circularly polarized light. Specific implementation methods include chiral material method and magnetic field method.

[0040] Chiral material method: Chiral materials are combined with cadmium sulfide or cadmium selenide quantum dots to prepare MicroLED lamp bead arrays. Chiral materials have a unique molecular structure that can have a specific effect on the polarization state of light. When light passes through a chiral material, it interacts with the molecules in the material, causing the polarization direction of the light to rotate, thereby generating circularly polarized light. By selecting a material with a specific chiral structure, the generation of left-handed circularly polarized light or right-handed circularly polarized light can be controlled.

[0041] Magnetic field method: When using a magnetic field to generate circularly polarized light, circularly polarized light is generated by controlling the magnetic field strength, magnetic field direction, electric field strength, electric field application method and frequency. Specifically, it is usually necessary to determine the appropriate magnetic field strength range based on the material properties of quantum dots (such as the size and doping conditions of CdS or CdSe quantum dots). Generally speaking, a magnetic field strength below a few Tesla (T) may have a significant effect on the luminescent polarization state of quantum dots. By changing the direction of the magnetic field, the rotation direction of circularly polarized light can be changed. For example, when the direction of the magnetic field is reversed, the rotation direction of the generated circularly polarized light will also be reversed. For the electric field, excessively high electric field strength may cause structural damage to the quantum dots or produce other non-radiative recombination processes, affecting the luminescence efficiency and polarization characteristics. Generally, an electric field strength of the order of tens of thousands of volts per centimeter (V / cm) may effectively regulate the luminescent polarization state of quantum dots. In addition, the application method and frequency of the electric field (if it is an alternating electric field) will also affect the polarization characteristics of light. For example, under the action of an alternating electric field, the light-emitting polarization state of quantum dots may change periodically as the frequency of the electric field changes. By selecting a suitable frequency range, circularly polarized light can be stably generated.

[0042] Through the above method, the light source layer 1 can generate left-handed circularly polarized light and right-handed circularly polarized light. In particular, the magnetic field method can dynamically adjust the polarization state of each lamp bead to achieve high-resolution dynamic adjustment.

[0043] The lamp beads in the MicroLED lamp bead array are arranged at equal intervals on the same plane. In the horizontal direction, two lamp beads form a lamp bead cycle, emitting left-handed circularly polarized light and right-handed circularly polarized light respectively.

[0044] The collimating optical layer 2 can convert the light emitted by the light source layer 1 into a collimated light beam.

[0045] Specifically, the collimating optical layer 2 is a lens array, which is made of polymer materials or inorganic materials, including but not limited to liquid crystal lens arrays, thermoplastic polyester lens arrays, and glass lens arrays.

[0046] The distance between the collimating optical layer 2 and the light source layer 1 is the back focal length of the lens array, and the horizontal section width of a single lens in the lens array is equal to the lamp bead period.

[0047] The electrically controlled light scattering layer 3 has a transparent mode and a scattering mode, which can be switched.

[0048] Specifically, the electrically controlled light scattering layer 3 is a polymer dispersed liquid crystal. When an electric field is applied to both sides of the polymer dispersed liquid crystal, it is in a transparent mode. When the electric field is removed, it is in a scattering mode.

[0049] The polarization volume holographic grating array layer 4 is composed of left-handed circular polarization gratings and right-handed circular polarization gratings arranged alternately.

[0050] Specifically, the polarized holographic grating uses circularly polarized light of a specific polarization state during holographic exposure, so it has polarization selectivity for incident circularly polarized light. For example, when it is prepared by exposure with left-handed circularly polarized light, it only directional refracts left-handed circularly polarized light in the optical path, while for right-handed circularly polarized light, it behaves as transparent glass. In the present invention, its polarization selection characteristics are utilized to directional refract incident light of different polarization states to achieve partitioned display.

[0051] In the polarizer holographic grating array layer 4 , the sizes of the left-handed circular polarization grating and the right-handed circular polarization grating are equal, and the horizontal section width of a single circular polarization grating is not less than 1 / 2 of the section width of a single lens in the collimating optical layer 2 .

[0052] When the electrically controlled light scattering layer 3 is in transparent mode, the liquid crystal display layer 5 only renders and displays the area through which the refracted light of the polarizer holographic grating array layer 4 passes. When the electrically controlled light scattering layer 3 is in scattering mode, the liquid crystal display layer 5 renders and displays the area through which all light passes.

[0053] The system includes three display modes, namely left-hand display mode, right-hand display mode and shared display mode. The partition display method is as follows:

[0054] When the electrically controlled light scattering layer 3 is in the transparent mode, the light source layer 1 emits left-handed circularly polarized light, the system operates in the left-handed display mode, and forms a left-handed display area; the light source layer 1 emits right-handed circularly polarized light, the system operates in the right-handed display mode, and forms a right-handed display area. When the electrically controlled light scattering layer 3 is in the scattering mode, the light source layer 1 emits left-handed circularly polarized light and right-handed circularly polarized light, the system operates in the shared display mode, and forms a shared display area.

[0055] Specifically, the left-hand display mode and the right-hand display mode can be performed separately or simultaneously. The simultaneous performance means that viewers at different positions on the left and right sides of the screen can select the left-hand display mode and the right-hand display mode on the same screen at the same time. At this time, the left-hand display mode and the right-hand display mode are alternately operated in time division multiplexing, and the two viewers can receive completely different display contents. The shared mode is that two viewers can receive the same content on the screen.

[0056] like Figure 2 As shown, in the left-handed display mode, the electrically controlled light scattering layer 3 is in the lens mode, and the expanded light from the light source layer 1 is modulated into a collimated light beam by the collimating optical layer 2. When the left-handed circularly polarized light from the light source layer 1 passes through the left-handed circularly polarized grating of the polarizer holographic grating array layer 4, the light is directionally refracted, as shown in FIG. Figure 2 When passing through a right-handed circular polarization grating, the light will pass directly through without changing its propagation direction, as shown in Figure 2The liquid crystal display layer 5 passed by the solid line is the LA region, and the liquid crystal display layer 5 passed by the dotted line is the LB region, and the LA region and the LB region do not overlap, as shown in FIG. Figure 5 At this time, due to the left-handed display mode, the LA area in the liquid crystal display layer 5 is rendered, and the rendered content is LAD, while the LB area in the liquid crystal display layer 5 is not rendered. At this time, a left-handed display area will be formed in the direction of propagation of left-handed circularly polarized light, and no rendering information will be found in other locations. Similarly, Figure 3 As shown, in the right-hand display mode, a right-hand display area is formed in the direction of propagation of right-hand circularly polarized light.

[0057] If the light source layer 1 generates left-handed circularly polarized light and right-handed circularly polarized light alternately, as long as the refresh rate of the liquid crystal display layer 5 is high enough, the left-handed display area and the right-handed display area can coexist. In addition, by changing the refraction angle of the polarizer holographic grating, the display position of the left-handed display area and the right-handed display area can be adjusted.

[0058] like Figure 4 As shown, in the shared display mode, it is only necessary to change the electrically controlled light scattering layer 3 to a fuzzy state (also called a frosted glass state), i.e., a scattering mode, and the incident light of the polarizer holographic grating array layer 4 will become stray light, and the polarization selection characteristics cannot be triggered. In this state, the optical characteristics of the polarizer holographic grating are manifested as transparent glass, and the light of the light source layer 1 cannot form an independent display area in space. At this time, the content rendered on the liquid crystal display layer 5 can be received in both the original left-handed display area and the right-handed display area, and they are consistent.

[0059] Figure 6 In the vehicle embodiment, the main driver and the co-driver are in the right-hand display area and the left-hand display area respectively. When the vehicle is driving, the main driver and the co-driver can enjoy the partitioned display. When the vehicle stops, the main driver and the co-driver can choose the shared display mode to watch the same content together.

[0060] In the present invention, unless otherwise specified, the scientific and technical terms used herein have the meanings commonly understood by those skilled in the art. In addition, the reagents, materials and operating procedures used herein are reagents, materials and conventional procedures widely used in the corresponding fields.

[0061] It should be noted that the terms such as "upper", "lower", "left", "right", "front", "back", etc. cited in the invention are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0062] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A partition display system based on polarization volume holographic grating, characterized in that: It includes a light source layer, a collimating optical layer, an electrically controlled light scattering layer, a polarizer holographic grating array layer and a liquid crystal display layer which are arranged in sequence from bottom to top; The light source layer can independently generate left-handed circularly polarized light and right-handed circularly polarized light; The collimating optical layer can convert the light emitted by the light source layer into a collimated light beam; The electrically controlled light-scattering layer has a transparent mode and a scattering mode, which can be switched; The polarization volume holographic grating array layer is composed of left-handed circular polarization gratings and right-handed circular polarization gratings arranged alternately; When the electrically controlled light scattering layer is in transparent mode, the liquid crystal display layer only renders and displays the area through which the refracted light of the polarizer holographic grating array layer passes; when the electrically controlled light scattering layer is in scattering mode, the liquid crystal display layer renders and displays the area through which all light passes.

2. The partition display system based on polarization volume holographic grating according to claim 1, characterized in that: The light source layer is a MicroLED lamp bead array based on cadmium sulfide or cadmium selenide quantum dots, which utilizes the spin-orbit coupling quantum mechanical effect of quantum dots to independently generate left-handed circularly polarized light and right-handed circularly polarized light.

3. The partition display system based on polarization volume holographic grating according to claim 2, characterized in that: The lamp beads in the MicroLED lamp bead array are arranged at equal intervals on the same plane; in the horizontal direction, two lamp beads form a lamp bead cycle, which emit left-handed circularly polarized light and right-handed circularly polarized light respectively.

4. The partition display system based on polarization volume holographic grating according to claim 3, characterized in that: The collimating optical layer is a lens array.

5. The partition display system based on polarization volume holographic grating according to claim 4, characterized in that: The interval between the collimating optical layer and the light source layer is the back focal length of the lens array, and the horizontal section width of a single lens in the lens array is equal to the lamp bead period.

6. The partition display system based on polarization volume holographic grating according to claim 1, characterized in that: The electrically controlled light scattering layer is polymer dispersed liquid crystal; When an electric field is applied on both sides of the polymer dispersed liquid crystal, it is in transparent mode; when the electric field is removed, it is in scattering mode.

7. The partition display system based on polarization volume holographic grating according to claim 4, characterized in that: In the polarizer holographic grating array layer, the sizes of the left-handed circular polarization grating and the right-handed circular polarization grating are equal, and the horizontal section width of a single circular polarization grating is not less than 1 / 2 of the section width of a single lens in the collimating optical layer.

8. The display method of a partitioned display system based on a polarization volume holographic grating according to any one of claims 1 to 7, characterized in that: The system includes three display modes, namely left-hand display mode, right-hand display mode and shared display mode; When the electrically controlled light scattering layer is in transparent mode, the light source layer emits left-handed circularly polarized light, and the system operates in a left-handed display mode to form a left-handed display area; when the light source layer emits right-handed circularly polarized light, the system operates in a right-handed display mode to form a right-handed display area; When the electrically controlled light scattering layer is in the scattering mode, the light source layer emits left-handed circularly polarized light and right-handed circularly polarized light, and the system runs in the shared display mode to form a shared display area.

9. The display method of the partition display system based on polarization volume holographic grating according to claim 8, characterized in that: The display method of the left-handed display mode is as follows: the left-handed circularly polarized light emitted by the light source layer becomes a collimated light beam after passing through the collimating optical layer; when passing through the polarizer holographic grating array layer, the left-handed circularly polarized incident light is directionally refracted by the left-handed circularly polarized grating, and the refracted light passes through the LA area of ​​the liquid crystal display layer, and the liquid crystal display layer displays content LAD in the LA area, forming a left-handed display area; the right-handed circularly polarized grating does not change the propagation direction of the left-handed circularly polarized incident light, and the direct light passes through the LB area of ​​the liquid crystal display layer, and the liquid crystal display layer does not display any content in the LB area; The display method of the right-handed display mode is as follows: the right-handed circularly polarized light emitted by the light source layer becomes a collimated light beam after passing through the collimating optical layer; when passing through the polarizer holographic grating array layer, the right-handed circularly polarized grating directionally refracts the right-handed circularly polarized incident light, and the refracted light passes through the RA area of ​​the liquid crystal display layer, and the liquid crystal display layer displays content RAD in the RA area, forming a right-handed display area; the left-handed circularly polarized grating does not change the propagation direction of the right-handed circularly polarized incident light, and the direct light passes through the RB area of ​​the liquid crystal display layer, and the liquid crystal display layer does not display any content in the RB area.

10. The display method of the partition display system based on polarization volume holographic grating according to claim 8, characterized in that: The display method of the shared display mode is as follows: the left-handed circularly polarized light and the right-handed circularly polarized light emitted by the light source layer become collimated light beams after passing through the collimating optical layer; after passing through the electrically controlled light scattering layer of the scattering mode, the collimated light beams become diffuse light beams; when the diffuse light beams pass through the polarizer holographic grating array layer, no directional refraction occurs; after passing through the liquid crystal display layer, a shared display area is formed.

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