A display device

Abstract

The application provides a display device; the display panel comprises a display panel, a first light modulation layer arranged on the light-emitting side of the display panel, and a second light modulation layer arranged on the side, away from the display panel, of the first light modulation layer, the second light modulation layer comprises a first 1 / 4 wave plate, a semi-transmissive and semi-reflective film, a lens, a second 1 / 4 wave plate, a reflective polarizer and a second polarizer arranged in sequence, the first light modulation layer comprises a plurality of modulation blocks corresponding to different areas of the display panel, the absorption axes of at least two modulation blocks are arranged vertically, or the phase retardation difference of at least two modulation blocks is 90 DEG; the application makes the emergent light of the display panel become linearly polarized light propagating through two light paths and forms two virtual image planes by arranging the first light modulation layer and the second light modulation layer on the light-emitting side of the display panel, so that multi-focal plane display is realized, and the overall structure is compact, the overall volume is small, the response speed is faster, and the multi-focal plane display effect is better.

Description

Technical Field

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

[0002] Virtual reality (VR) technology is a way to magnify and project virtual scenes to enhance immersion. Current VR display devices achieve 3D functionality based on parallax, and the resulting image plane usually has only one position. The adjustment signals received by the human eye's optic nerve from the brain based on multiple image distances of the stereoscopic image conflict with the human eye's actual focus on the single image plane position. This causes eye fatigue and dizziness when the human eye continuously views dynamic 3D images, a phenomenon known as convergence conflict.

[0003] Currently, multi-focal plane displays can be achieved by increasing the number of focal planes, for example, by using multi-plane displays or zoom lenses, and by utilizing spatial multiplexing. However, as the number of multi-plane displays increases, the size of near-eye display devices also increases, while the related structural components of zoom lenses are complex and have a slow response speed, which affects the effect of multi-focal plane displays. Summary of the Invention

[0004] This application provides a display device to improve the technical problem that current near-eye display devices have large size or complex related structural components, which affect the multifocal display effect.

[0005] To solve the above-mentioned technical problems, the technical solution provided in this application is as follows:

[0006] This application provides a display device, including:

[0007] Display panel;

[0008] A first light modulation layer is disposed on the light-emitting side of the display panel;

[0009] A second light modulation layer is disposed on the side of the first light modulation layer away from the display panel. The second light modulation layer includes a first quarter wave plate disposed on the side of the first light modulation layer away from the display panel, a semi-transparent and semi-reflective film disposed on the first quarter wave plate away from the first light modulation layer, a lens disposed on the semi-transparent and semi-reflective film away from the first light modulation layer, a second quarter wave plate disposed on the side of the lens away from the semi-transparent and semi-reflective film, a reflective polarizer disposed on the side of the second quarter wave plate away from the lens, and a third polarizer disposed on the side of the reflective polarizer away from the second quarter wave plate.

[0010] The first optical modulation layer includes multiple modulation blocks corresponding to different areas of the display panel, and the absorption axes of at least two of the modulation blocks are arranged perpendicularly, or the phase delay difference between at least two of the modulation blocks is 90°.

[0011] In the display device of this application, the first light modulation layer includes a first polarizer disposed on the light emitting surface of the display panel;

[0012] The first polarizer includes a plurality of modulation blocks corresponding to different areas of the display panel, and the absorption axes of at least two of the modulation blocks are arranged perpendicularly.

[0013] In the display device of this application, the display device further includes a second polarizer located on the side of the display panel away from the first polarizer;

[0014] The second polarizer includes multiple modulation regions corresponding to the first polarizer, and the absorption axis of the modulation region is perpendicular to the absorption axis of the corresponding modulation block.

[0015] In the display device of this application, the first light modulation layer includes a first polarizer disposed on the light-emitting surface of the display panel and a phase delay layer disposed on the side of the first polarizer away from the display panel;

[0016] The phase delay layer includes multiple modulation blocks corresponding to different areas of the display panel, and the phase delay difference between at least two of the modulation blocks is 90°.

[0017] In the display device of this application, the phase retardation layer includes a liquid crystal coating disposed on the side of the first polarizer away from the display panel, and the liquid crystal coating includes a plurality of liquid crystal molecules;

[0018] In this case, the pretilt angles of the liquid crystal molecules in at least two of the modulation blocks differ by 90°.

[0019] In the display device of this application, the phase retardation layer includes a first electrode layer, a second electrode layer, and a liquid crystal deflection layer disposed between the first electrode layer and the second electrode layer;

[0020] The first electrode layer and the second electrode layer include a plurality of transparent electrodes, and at least two of the transparent electrodes in the first electrode layer and the second electrode layer are independently connected to a voltage input terminal.

[0021] In the display device of this application, the deflection frequency of the liquid crystal molecules in the liquid crystal deflection layer is greater than or equal to 30Hz and less than or equal to 240Hz.

[0022] In the display device of this application, the modulation block includes a first modulation block and a second modulation block, wherein the absorption axes of the first modulation block and the second modulation block are perpendicularly arranged or the phase delay difference is 90°.

[0023] The plurality of first modulation blocks and the plurality of second modulation blocks are arranged along a first direction, and the first modulation blocks and the second modulation blocks are alternately arranged along a second direction, the second direction being perpendicular to the first direction.

[0024] In the display device of this application, the modulation block includes a first modulation block and a second modulation block, wherein the absorption axes of the first modulation block and the second modulation block are perpendicularly arranged or the phase delay difference is 90°.

[0025] In this configuration, multiple first modulation blocks and multiple second modulation blocks are alternately arranged in a first direction and a second direction, wherein the second direction is perpendicular to the first direction.

[0026] In the display device of this application, the modulation block includes a first modulation block and a second modulation block, wherein the absorption axes of the first modulation block and the second modulation block are perpendicularly arranged or the phase delay difference is 90°.

[0027] The plurality of first modulation blocks correspond to the central region of the display panel, and the plurality of second modulation blocks correspond to the peripheral region of the display panel located outside the central region.

[0028] Beneficial effects

[0029] This application sequentially sets a first light modulation layer and a second light modulation layer on the light-emitting side of the display panel. The emitted light from the display panel is modulated by the first light modulation layer and the second light modulation layer, becoming linearly polarized light corresponding to the modulation block and propagating through two light paths before entering the human eye to form an image. Since the linearly polarized light entering the human eye has two propagation paths, the image planes formed by the linearly polarized light entering the human eye through the two propagation paths do not overlap, that is, there are two virtual image planes. This achieves multi-focal plane display, producing a sense of depth and three-dimensionality at different levels of focal planes, which can effectively improve the user's three-dimensional stereoscopic perception and solve the problem of convergence conflict. Moreover, the overall structure of this application is compact, the overall volume is small, the response speed is faster, and the multi-focal plane display effect is better. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the first overall structure of the display device described in this application;

[0032] Figure 2 This is a schematic diagram of a second overall structure of the display device described in this application;

[0033] Figure 3 This is a schematic diagram of the first structure of the first optical modulation layer in this application;

[0034] Figure 4 This is a schematic diagram of a second structure of the first optical modulation layer in this application;

[0035] Figure 5 This is a schematic diagram of the first structure of the phase delay layer described in this application;

[0036] Figure 6 This is a schematic diagram of the second structure of the phase delay layer described in this application;

[0037] Figure 7 This is a schematic diagram of the phase delay period variation in a certain modulation region within the phase delay layer described in this application;

[0038] Figure 8 This is a schematic diagram of a first arrangement of the first modulation block and the second modulation block in this application;

[0039] Figure 9 This is a schematic diagram of a second arrangement of the first modulation block and the second modulation block in this application;

[0040] Figure 10 This is a schematic diagram of a third arrangement of the first modulation block and the second modulation block in this application.

[0041] Explanation of reference numerals in the attached figures:

[0042] 100. Display panel;

[0043] 200, First optical modulation layer; 210, First modulation block; 220, Second modulation block; 230, First polarizer; 240, Phase retardation layer; 241, Alignment coating; 242, Liquid crystal coating; 243, Liquid crystal deflection layer; 244, First electrode layer; 245, Second electrode layer; 246, Transparent electrode; 247, Transparent film layer;

[0044] 300, Second optical modulation layer; 310, First quarter-wave plate; 320, Semi-transparent and semi-reflective coating; 330, Lens; 340, Second quarter-wave plate; 350, Reflective polarizer; 360, Third polarizer;

[0045] 400. Second polarizer;

[0046] 500. Backlight module; Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0048] Virtual reality (VR) technology is a way to magnify and project virtual scenes to enhance immersion. Current VR display devices achieve 3D functionality based on parallax, and the resulting image plane usually has only one position. The adjustment signals received by the human eye's optic nerve from the brain based on multiple image distances of the stereoscopic image conflict with the human eye's actual focus on the single image plane position. This causes eye fatigue and dizziness when the human eye continuously views dynamic 3D images, a phenomenon known as convergence conflict.

[0049] Currently, multi-focal plane displays can be achieved by increasing the number of focal planes, for example, by using multi-plane displays or zoom lenses, and utilizing spatial multiplexing. However, as the number of multi-plane displays increases, the size of near-eye display devices also increases, while the related structural components of zoom lenses become complex and have a slow response speed, affecting the effect of multi-focal plane displays. This application proposes the following solution based on the above-mentioned technical problems.

[0050] Please see Figures 1 to 10This application provides a display device, including a display panel 100, a first light modulation layer 200 disposed on the light-emitting side of the display panel 100, and a second light modulation layer 300 disposed on the side of the first light modulation layer 200 away from the display panel 100. The second light modulation layer 300 includes a first quarter-wave plate 310 disposed on the side of the first light modulation layer 200 away from the display panel 100, a transflective film 320 disposed on the first quarter-wave plate 310 away from the first light modulation layer 200, a lens 330 disposed on the transflective film 320 away from the first light modulation layer 200, a second quarter-wave plate 340 disposed on the side of the lens 330 away from the transflective film 320, a reflective polarizer 350 disposed on the side of the second quarter-wave plate 340 away from the lens 330, and a third polarizer 360 disposed on the side of the reflective polarizer 350 away from the second quarter-wave plate 340. The first optical modulation layer 200 includes multiple modulation blocks corresponding to different areas of the display panel 100, wherein the absorption axes of at least two of the modulation blocks are vertically arranged, or the phase delay difference between at least two of the modulation blocks is 90°.

[0051] This application constructs a first light modulation layer 200 and a second light modulation layer 300 sequentially on the light-emitting side of a display panel 100. This allows the emitted light from the display panel 100 to pass through at least two modulation blocks within the first light modulation layer 200, where the absorption axes are perpendicular to each other or the phase delay difference is 90°, thus transforming into first linearly polarized light and second linearly polarized light with perpendicular polarization directions, respectively. The first linearly polarized light and the second linearly polarized light then pass through the first quarter-wave plate 310, becoming first circularly polarized light and second circularly polarized light, respectively. After passing through the semi-transparent and semi-reflective film 320 and the lens 330, the first circularly polarized light and the second circularly polarized light then pass through the second quarter-wave plate 340, respectively, and revert back to first linearly polarized light and second linearly polarized light. In this process, the first linearly polarized light passes through the reflective polarizer 350 and the second polarizer 400, enters the human eye, and forms the first virtual image plane. The second linearly polarized light is reflected back to the second quarter-wave plate 340 by the reflective polarizer 350 and becomes the first circularly polarized light. After the first circularly polarized light is incident on the lens 330 and the semi-reflective coating 320, a portion of the first circularly polarized light is directly transmitted and does not participate in the imaging. The other portion of the first circularly polarized light is reflected by the semi-reflective coating 320 and its rotation direction is changed, becoming the second circularly polarized light. The second circularly polarized light passes through the second quarter-wave plate 340 again and is transformed into the first linearly polarized light with a polarization direction perpendicular to the second linearly polarized light. The first linearly polarized light can pass through the reflective polarizer 350 and the second polarizer 400, and then reach the human eye to form a second virtual image plane that is different from the first virtual image plane.

[0052] In this embodiment, the emitted light from the display panel 100 is modulated by the first light modulation layer 200 and the second light modulation layer, becoming linearly polarized light corresponding to the modulation block and propagating through two light paths before entering the human eye to form an image. Since the linearly polarized light entering the human eye has two propagation paths, the image planes formed by the linearly polarized light entering the human eye through the two propagation paths do not overlap, that is, there are two virtual image planes, thereby realizing multi-focal plane display, producing a sense of depth and three-dimensionality of different focal planes, which can effectively improve the user's three-dimensional stereoscopic perception and solve the problem of convergence conflict. Moreover, the overall structure of this application is compact, the overall volume is small, the response speed is faster, and the multi-focal plane display effect is better.

[0053] The technical solutions of this application will now be described with reference to specific embodiments. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments.

[0054] Please see Figure 1 and Figure 2 In the display device of this application, the display panel 100 can be an active-emitting display panel or a passive-emitting display panel that achieves illumination through a backlight module 500. The active-emitting display panel 100 can include OLED display panels, LED display panels, Mini-LED display panels, Micro-LED display panels, etc., while the passive-emitting display panel 100 can be a liquid crystal display panel, etc.

[0055] In this embodiment, when the display panel 100 is an active light-emitting display panel, there is no need to set other polarizing film layers on the backlight side of the display panel 100. The emitted light actively emitted by the display panel 100 can be transformed into two types of linearly polarized light with the same polarization direction but different propagation paths after passing through the first light modulation layer 200 and the second light modulation layer 300, thereby forming two non-overlapping virtual image surfaces in the human eye and realizing multi-layer three-dimensional stereoscopic display.

[0056] In this embodiment, the first optical modulation layer 200 may include, but is not limited to, the first polarizer 230.

[0057] Please see Figure 2In this embodiment, when the display panel 100 is a passively emitting display panel, i.e., the display panel 100 is a liquid crystal display panel, it needs to achieve light emission display by means of a backlight module 500 located on the side of the display panel 100 away from the light-emitting side. At this time, a second polarizer 400 is correspondingly provided on the side of the display panel 100 away from the light-emitting side. The second polarizer 400 needs to be correspondingly provided with a modulation area directly opposite the plurality of modulation blocks. The absorption axis of the second polarizer 400 in each modulation area needs to be perpendicular to the absorption axis of the corresponding modulation block, so that the liquid crystal display panel 100 can achieve normal light emission display.

[0058] Please see Figures 3 to 4 In the display device of this application, the first light modulation layer 200 can be a single-layer film structure or a composite structure of multiple films.

[0059] Please see Figure 3 In this embodiment, the first light modulation layer 200 may be the first polarizer 230 disposed on the light emitting surface of the display panel 100. In this case, the plurality of modulation blocks are the division of the first polarizer 230 into a plurality of sub-regions with areas that may be equal or unequal in size. In this case, the absorption axis of the first polarizer 230 is vertically arranged in at least two sub-regions, that is, the absorption axis of the first polarizer 230 may be patterned.

[0060] At this time, the light emitted from the display panel 100 passes through at least two sub-regions on the first polarizer 230 whose absorption axes are perpendicular to each other, and becomes two types of linearly polarized light with perpendicular polarization directions. After being modulated by the second light modulation layer 300, the two types of linearly polarized light become two types of linearly polarized light with the same polarization direction but propagating along different paths, thereby forming two virtual image surfaces in the human eye and realizing multi-layered multi-focal surface three-dimensional stereoscopic display.

[0061] Please see Figure 4 In this embodiment, the first light modulation layer 200 can also be a multilayer film structure. Specifically, the first light modulation layer 200 can be a composite structure of a first polarizer 230 disposed on the light-emitting surface of the display panel 100 and a phase retardation layer 240 disposed on the first polarizer 230. In this case, the absorption axes on the first polarizer 230 are all arranged parallel to each other in the same direction, while the phase retardation layer 240 is divided into multiple modulation regions corresponding to different regions of the display panel 100. The phase retardation layer 240 in each modulation region and the first polarizer 230 in the corresponding region together constitute the modulation block.

[0062] It should be noted that a phase delay difference of 90° between at least two of the modulation blocks can be understood as a phase delay difference of 90° between the phase delay layers 240 within at least two of the modulation regions. In this case, the emitted light from the display panel 100 becomes linearly polarized light after passing through the first polarizer 230, and this linearly polarized light, after passing through two phase delay layers 240 with a phase delay difference of 90°, can become two types of linearly polarized light with perpendicular polarization directions, thus achieving the same function as a polarizer patterned along the absorption axis.

[0063] Please see Figure 5 In the display device of this application, the phase retardation layer 240 may include a liquid crystal coating 242 disposed on the side of the first polarizer 230 away from the display panel 100, and the liquid crystal coating 242 may include a plurality of liquid crystal molecules. Specifically, the phase retardation layer 240 may further include an alignment coating 241 disposed on the side of the first polarizer 230 away from the display panel 100, and the plurality of liquid crystal molecules may be mixed with a polymer material and then coated on the alignment coating 241.

[0064] In this embodiment, the pretilt angles of the liquid crystal molecules in at least two of the modulation blocks differ by 90°, so that the phase retardation layer 240 in at least the modulation blocks has a phase retardation difference of 90°. Specifically, in this embodiment, the surface of the alignment coating 241 can be patterned so that the pretilt angles of the liquid crystal molecules coated on the alignment coating 241 meet the requirement that the pretilt angles of the liquid crystal molecules in at least two of the modulation blocks differ by 90°.

[0065] In this embodiment, by setting a liquid crystal coating 242 as the phase delay layer 240, multiple modulation regions with a 90° phase delay difference can be easily divided on the phase delay layer 240. The phase delay layer 240 is simple to manufacture and has low cost.

[0066] Please see Figure 6 and Figure 7 In the display device of this application, since the emitted light from the display screen is modulated by a modulation block with a 90° phase difference, some of the emitted light from the pixels is used to form the first virtual image and the emitted light from the other pixels is used to form the second virtual image. However, the total number of pixels in the display panel 100 remains unchanged. Therefore, the "static" modulation block setting will cause the first and second virtual images observed by the human eye to have different degrees of brightness loss and resolution loss.

[0067] In this embodiment, in order to solve the problem of brightness loss and resolution loss caused by "static" modulation blocks, the phase delay layer 240 can be configured to include multiple "dynamically variable" modulation blocks.

[0068] Specifically, please refer to Figure 6 The phase retardation layer 240 may include a first electrode layer 244, a second electrode layer 245, and a liquid crystal deflection layer 243 disposed between the first electrode layer 244 and the second electrode layer 245. The liquid crystal deflection layer 243 includes a plurality of deflectable liquid crystal molecules. The liquid crystal molecules are deflected under the electric field formed by the first electrode layer 244 and the second electrode layer 245, changing the deflection angle, thereby achieving the control of light. An insulating transparent film layer 247 may be disposed on the side of the first electrode layer 244 and the second electrode layer 245 away from the liquid crystal deflection layer 243 to protect the first electrode layer 244 and the second electrode layer 245 from external interference.

[0069] In this embodiment, the first electrode layer 244 and the second electrode layer 245 may include a plurality of transparent electrodes 246, and at least two of the transparent electrodes 246 in the first electrode layer 244 and the second electrode layer 245 are independently connected to a voltage input terminal.

[0070] In this embodiment, by providing at least two independently connected transparent electrodes 246 with voltage input terminals in the first electrode layer 244 and the second electrode layer 245, the liquid crystal deflection layer 243 can form at least two independently controllable liquid crystal deflection regions. This allows for independent control of the deflection angle of liquid crystal molecules within the at least two liquid crystal deflection regions, enabling the phase retardation layer 240 to form at least two modulation blocks with a 90° phase retardation difference, thereby achieving the modulation function of the emitted light from the display panel 100. Furthermore, by adjusting the voltage magnitude and direction of the liquid crystal deflection regions, the phase retardation layer 240 can form at least two modulation blocks with a 90° phase retardation difference that are "dynamically variable."

[0071] Please see Figure 7 For example, suppose that during a certain time period, the deflection voltage of the liquid crystal deflection area corresponding to a certain region of the display panel 100 is V1, and the phase delay corresponding to this liquid crystal deflection area is λ1. The deflection voltage of the liquid crystal deflection area corresponding to another region of the display panel 100 is V2, and the phase delay corresponding to this liquid crystal deflection area is λ2. The absolute value of the difference between λ1 and λ2 is equal to π / 2. In the next time period, the deflection voltage of the liquid crystal deflection area corresponding to a certain region of the display panel 100 is adjusted to V2, and the phase delay corresponding to this liquid crystal deflection area changes to λ2. Meanwhile, the deflection voltage of the liquid crystal deflection area corresponding to another region of the display panel 100 is adjusted to V1, and the phase delay corresponding to this liquid crystal deflection area changes to λ1. At this time, it is equivalent to the positions of the two control blocks with a phase delay difference of 90° being swapped, that is, the control blocks are "dynamically variable," but it is still possible to modulate the emitted light from the display panel 100 into two types of linearly polarized light with perpendicular polarization directions.

[0072] In this embodiment, the deflection frequency of the liquid crystal molecules within the liquid crystal deflection layer 243 can be greater than or equal to 30Hz and less than or equal to 240Hz. At this time, the "position change" frequency of the modulation block is higher than the frequency perceptible to the human eye, and the human eye will not be able to perceive the "position change" of at least two modulation blocks with a phase delay difference of 90°. Due to the persistence of vision effect of the human eye, from the human eye's perspective, the light emitted from each area of ​​the display panel 100 can form a first virtual image and a second virtual image, thereby reducing the "brightness loss" and "resolution loss" at the human eye's observation level.

[0073] Please see Figures 8 to 10 In the display device of this application, the modulation block includes a first modulation block 210 and a second modulation block 220, wherein the absorption axes of the first modulation block 210 and the second modulation block 220 are perpendicularly arranged or the phase delay difference is 90°.

[0074] Specifically, when the first light modulation layer 200 includes only the first polarizer 230 with the absorption axis patterned, assuming that the absorption axis of the first polarizer 230 corresponding to the first modulation block 210 is 0°, then the absorption axis of the first polarizer 230 corresponding to the second modulation block 220 is 90°.

[0075] When the first light modulation layer 200 includes the first polarizer 230 and the phase delay layer 240 with their absorption axes arranged in parallel, the light emitted from the display panel 100 becomes first linearly polarized light after passing through the first polarizer 230. Assuming that the phase delay of the first linearly polarized light by the phase delay layer 240 corresponding to the first modulation block 210 is 0, then the phase delay of the first linearly polarized light by the phase delay layer 240 corresponding to the second modulation block 220 is π / 2.

[0076] Please see Figure 8 In some embodiments, the plurality of first modulation blocks 210 and the plurality of second modulation blocks 220 may be arranged along a first direction, and the first modulation blocks 210 and the second modulation blocks 220 may be alternately arranged along a second direction, the second direction being perpendicular to the first direction. Specifically, the first direction and the second direction may be the row / column direction and column / row direction of the pixel unit arrangement in the display panel 100, respectively.

[0077] Please see Figure 9In some embodiments, the plurality of first modulation blocks 210 and the plurality of second modulation blocks 220 may be alternately arranged in a first direction and a second direction, wherein the second direction is perpendicular to the first direction. Specifically, the first direction and the second direction may be the row / column direction and column / row direction of the pixel unit arrangement in the display panel 100, respectively.

[0078] Please see Figure 9 In some embodiments, a plurality of first modulation blocks 210 may correspond to the central region of the display panel 100, and a plurality of second modulation blocks 220 may correspond to the peripheral region of the display panel 100 located outside the central region.

[0079] In this embodiment, each modulation block may correspond to a microscopic pixel unit on the display panel 100, or it may correspond to a macroscopic display area on the display panel 100.

[0080] In this embodiment, by arranging the first modulation block 210 and the second modulation block 220 in the above-described manner, the arrangement of the first modulation block 210 and the second modulation block 220 can be made more regular. After the light emitted from the display panel 100 is modulated by the first modulation block 210 and the second modulation block 220, it enters the human eye more evenly to form an image, thereby achieving a better three-dimensional visual experience.

[0081] This application embodiment sequentially arranges a first light modulation layer 200 and a second light modulation layer 300 on the light-emitting side of the display panel 100. The emitted light from the display panel 100 is modulated by the first light modulation layer 200 and the second light modulation layer, becoming linearly polarized light corresponding to the modulation block and propagating through two light paths before entering the human eye to form an image. Since the linearly polarized light entering the human eye has two propagation paths, the image planes formed by the linearly polarized light entering the human eye through the two propagation paths do not overlap, that is, there are two virtual image planes. This achieves multi-focal plane display, producing a sense of depth and three-dimensionality at different levels of focal planes, which can effectively improve the user's three-dimensional stereoscopic perception and solve the problem of convergence conflict. Moreover, the overall structure of this application is compact, the overall volume is small, the response speed is faster, and the multi-focal plane display effect is better.

[0082] The above provides a detailed description of a display device provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A display device, characterized in that, include: Display panel; A first light modulation layer is disposed on the light-emitting side of the display panel. The first light modulation layer includes multiple modulation blocks corresponding to different areas of the display panel. The absorption axes of at least two of the modulation blocks are arranged perpendicularly, or the phase delay difference between at least two of the modulation blocks is 90°. A second light modulation layer is disposed on the side of the first light modulation layer away from the display panel. The second light modulation layer includes a first quarter wave plate disposed on the side of the first light modulation layer away from the display panel, a semi-transparent and semi-reflective film disposed on the first quarter wave plate away from the first light modulation layer, a lens disposed on the semi-transparent and semi-reflective film away from the first light modulation layer, a second quarter wave plate disposed on the side of the lens away from the semi-transparent and semi-reflective film, a reflective polarizer disposed on the side of the second quarter wave plate away from the lens, and a third polarizer disposed on the side of the reflective polarizer away from the second quarter wave plate. The second polarizer is located on the side of the display panel away from the first light modulation layer; The emitted light from the display panel passes through at least two modulation blocks within the first light modulation layer whose absorption axes are perpendicular to each other or whose phase delay difference is 90°, and is then transformed into first linearly polarized light and second linearly polarized light with perpendicular polarization directions, respectively. The first linearly polarized light passes through the first quarter-wave plate, the semi-transparent and semi-reflective film, the lens, and the second quarter-wave plate, and then through the reflective polarizer and the second polarizer to enter the human eye and form the first virtual image surface. Simultaneously, the second linearly polarized light passes through the first quarter-wave plate, the semi-transparent and semi-reflective film, the lens, and the second quarter-wave plate, is reflected back to the second quarter-wave plate by the reflective polarizer, and then incident on the lens and the semi-transparent and semi-reflective film. After being reflected by the semi-transparent and semi-reflective film and having its rotation direction changed, it passes through the second quarter-wave plate again, and then through the reflective polarizer and the second polarizer to enter the human eye and form a second virtual image surface that does not coincide with the first virtual image surface. The light emitted from the display panel enters the human eye after passing through the first light modulation layer and the second light modulation layer, and the first virtual image surface and the second virtual image surface exist simultaneously in the human eye.

2. The display device according to claim 1, characterized in that, The first light modulation layer includes a first polarizer disposed on the light-emitting surface of the display panel; The first polarizer includes a plurality of modulation blocks corresponding to different areas of the display panel, and the absorption axes of at least two of the modulation blocks are arranged perpendicularly.

3. The display device according to claim 2, characterized in that, The second polarizer is located on the side of the display panel away from the first polarizer; The second polarizer includes multiple modulation regions corresponding to the first polarizer, and the absorption axis of the modulation region is perpendicular to the absorption axis of the corresponding modulation block.

4. The display device according to claim 1, characterized in that, The first light modulation layer includes a first polarizer disposed on the light-emitting surface of the display panel and a phase delay layer disposed on the side of the first polarizer away from the display panel; The phase delay layer includes multiple modulation blocks corresponding to different areas of the display panel, and the phase delay difference between at least two of the modulation blocks is 90°.

5. The display device according to claim 4, characterized in that, The phase retardation layer includes a liquid crystal coating disposed on the side of the first polarizer away from the display panel, and the liquid crystal coating includes a plurality of liquid crystal molecules; In this case, the pretilt angles of the liquid crystal molecules in at least two of the modulation blocks differ by 90°.

6. The display device according to claim 4, characterized in that, The phase delay layer includes a first electrode layer, a second electrode layer, and a liquid crystal deflection layer disposed between the first electrode layer and the second electrode layer; The first electrode layer and the second electrode layer include a plurality of transparent electrodes, and at least two of the transparent electrodes in the first electrode layer and the second electrode layer are independently connected to a voltage input terminal.

7. The display device according to claim 6, characterized in that, The deflection frequency of the liquid crystal molecules in the liquid crystal deflection layer is greater than or equal to 30Hz and less than or equal to 240Hz.

8. The display device according to claim 2 or 4, characterized in that, The modulation block includes a first modulation block and a second modulation block, wherein the absorption axes of the first modulation block and the second modulation block are perpendicularly arranged or the phase delay difference is 90°. The plurality of first modulation blocks and the plurality of second modulation blocks are arranged along a first direction, and the first modulation blocks and the second modulation blocks are alternately arranged along a second direction, the second direction being perpendicular to the first direction.

9. The display device according to claim 2 or 4, characterized in that, The modulation block includes a first modulation block and a second modulation block, wherein the absorption axes of the first modulation block and the second modulation block are perpendicularly arranged or the phase delay difference is 90°. In this configuration, multiple first modulation blocks and multiple second modulation blocks are alternately arranged in a first direction and a second direction, wherein the second direction is perpendicular to the first direction.

10. The display device according to claim 2 or 4, characterized in that, The modulation block includes a first modulation block and a second modulation block, wherein the absorption axes of the first modulation block and the second modulation block are perpendicularly arranged or the phase delay difference is 90°. The plurality of first modulation blocks correspond to the central region of the display panel, and the plurality of second modulation blocks correspond to the peripheral region of the display panel located outside the central region.

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