Display device and preparation method thereof

Abstract

The embodiment of the invention discloses a display device and a preparation method thereof, the display device comprises a display module and an imaging component, the display module comprises a display panel and a lens grating layer, and the lens grating layer comprises a lens. The width of the lens meets a first relational expression: D = 2H * tan theta ', and theta' = arcsin [(sin theta) / n0]. On the basis that one pixel unit corresponds to one lens, each pixel unit comprises a first pixel and a second pixel, and the first pixel and the second pixel are located on the two sides of the optical axis of the lens, the width of the lens is set to meet a first relational expression, and the first relational expression is larger than the second relational expression. Therefore, the risk of light crosstalk of two adjacent pixel units is reduced, the ability of the lens to allocate the first image and the second image is improved, the risk of crosstalk of the first image and the second image is further reduced, and the three-dimensional display effect is improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display device and a method for manufacturing the same. Background Art

[0002] The current mainstream AR-HUD is still mainly based on two-dimensional display, which has two major defects: first, the two-dimensional virtual image is not well fitted with the real scene on the ground, resulting in the navigation arrows or obstacle warning information not being able to accurately match the actual road conditions; second, due to the limitations of optical design, the distance of the virtual image is generally fixed, and the navigation display cannot cover any farther distances.

[0003] The emergence of AR-HUD 3D technology provides a breakthrough solution to the above problems. However, current 3D display technology suffers from severe crosstalk between the left-eye image and the right-eye image, resulting in poor display quality. Summary of the Invention

[0004] Embodiments of the present application provide a display device and a manufacturing method thereof, which can reduce the risk of crosstalk between a first image and a second image, thereby improving a three-dimensional display effect.

[0005] An embodiment of the present application provides a display device, comprising: A display module includes a display panel and a lens grating layer, wherein the lens grating layer is disposed on a light-emitting side of the display panel, the display panel is configured to display a first image and a second image, and the lens grating layer is configured to separate the first image and the second image and form the first image and the second image with parallax; an imaging member configured to reflect the first image and the second image having parallax to an eyeball or an eye box to form a three-dimensional virtual image; The lens grating layer includes a plurality of lenses, and on the optical axis of the lens, the distance from the intersection of the arc surface of the lens and the optical axis of the lens to the pixel of the display panel is a first distance; The width of the lens satisfies the first relationship: D=2H×tanθ′, θ′=arcsin[(sinθ) / n0]; Wherein, D is the width of the lens, H is the first distance, θ is the half field of view angle of the display device, n0 is the refractive index of at least one transparent film layer located on the light-emitting side of the pixel in the display module as a transparent medium body, and the transparent medium body includes at least the lens grating layer.

[0006] Optionally, in some embodiments of the present application, 50 microns ≤ D ≤ 300 microns, and 100 microns ≤ H ≤ 1500 microns.

[0007] Optionally, in some embodiments of the present application, the lens grating layer further includes a light-transmitting substrate, the plurality of lenses are arranged on a side of the light-transmitting substrate away from the display panel, and the focal length of the lens is equal to the first distance; The curvature radius of the lens satisfies the second relationship: R=flens×(n1-n2) / n2; Wherein, R is the curvature radius of the lens, flens is the focal length of the lens, n1 is the refractive index of the lens, n2 is the refractive index of the light-transmitting substrate, and n1>n2.

[0008] Optionally, in some embodiments of the present application, 50 microns ≤ R ≤ 300 microns.

[0009] Optionally, in some embodiments of the present application, on the optical axis of the lens, the height of the lens satisfies the third relationship: ; Wherein, h1 is the height of the lens.

[0010] Optionally, in some embodiments of the present application, the display device further includes a reflector assembly, and the reflector assembly is configured to reflect the first image and the second image with parallax to the imaging member.

[0011] Optionally, in some embodiments of the present application, the imaging component is a windshield plate of a vehicle.

[0012] Accordingly, an embodiment of the present application further provides a method for manufacturing a display device, which includes the following steps: A lens grating layer is provided on a light-emitting side of the display panel to form a display module, wherein the display panel is configured to display a first image and a second image of the same screen, and the lens grating layer is configured to separate the first image and the second image and form the first image and the second image with parallax, and the lens grating layer includes a plurality of lenses; providing an imaging member configured to reflect the first image and the second image having parallax to an eyeball or an eye box to form a three-dimensional virtual image; The preparation of the lens grating layer comprises the following steps: Get the set distance H y , the half field of view setting angle θ of the display device y and the set refractive index n0 of the transparent medium y , set the distance H y The set distance is the intersection of the arc surface of the lens of the lens grating layer and the optical axis of the lens to the pixel of the display panel, and the light-transmitting medium is at least one light-transmitting film layer located on the light-emitting side of the pixel in the display module, and the light-transmitting medium at least includes the lens grating layer; According to the relationship formula 1: D y =2H y ×tanθ y ′ and the modified formula of Snell's law: θ y ′=arcsin[(sinθ y ) / n0 y ], and obtain the set width D of the lens y ; According to the setting width D y The lens is prepared.

[0013] Optionally, in some embodiments of the present application, the lens grating layer further includes a light-transmitting substrate, and the plurality of lenses are arranged on a side of the light-transmitting substrate away from the display panel; and preparing the lens grating layer includes the following steps: Get the set focal length flens of the lens y , the set refractive index n1 of the lens y and the set refractive index n2 of the light-transmitting substrate y ; According to the relationship formula 2: R y =flens y ×(n1 y -n2 y ) / n2 y , get the set curvature radius R of the lens y ; According to the setting curvature radius R y The lens is prepared.

[0014] Optionally, in some embodiments of the present application, preparing the lens grating layer includes the following steps: According to the setting width D y and the set curvature radius R y , combined with equation three: , get the set height h1 of the lens y ; According to the setting height h1 y The lens is prepared.

[0015] Optionally, in some embodiments of the present application, the half field of view setting angle θ of the display device is obtained. y , including the following steps: According to the equivalent virtual model of the display device, obtaining the width W′2 of the eye box virtual image and the distance Δ2 from the eye box virtual image to the virtual display module; According to the width W′2 of the eye box virtual image and the distance △2 from the eye box virtual image to the virtual display module, combined with the formula: tanθ y =(W′2) / (2×△2), and the half-viewing angle θ of the display device is obtained. y .

[0016] The display device of the present application embodiment includes a display module and an imaging component. The display module includes a display panel and a lens grating layer. The display panel is configured to display a first image and a second image of the same screen. The lens grating layer is configured to separate the first image and the second image and form the first image and the second image with parallax. The imaging component is configured to reflect the first image and the second image with parallax to the eyeball or eye box to form a three-dimensional virtual image. The width of the lens satisfies the first relationship: D = 2H × tanθ′, θ′ = arcsin [(sinθ) / n0].

[0017] It can be understood that, based on the fact that one pixel unit corresponds to one lens, each pixel unit includes a first pixel and a second pixel, and the first pixel and the second pixel are located on both sides of the optical axis of the lens. Therefore, the display device of the embodiment of the present application reduces the risk of light crosstalk between two adjacent pixel units by setting the width of the lens to satisfy the first relationship, and improves the ability of the lens to distribute the first image and the second image, thereby reducing the risk of crosstalk between the first image and the second image, thereby improving the three-dimensional display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a display device provided in an embodiment of the present application; Figure 2 is a schematic structural diagram of a display module of a display device provided in an embodiment of the present application; Figure 3 is a schematic structural diagram of a lens of a display device provided in an embodiment of the present application; Figure 4 is a display effect diagram of the first image and the second image of the display device provided in an embodiment of the present application; Figure 5 1 is a flow chart of a method for manufacturing a display device provided in an embodiment of the present application; Figure 6 It is a computational model of the equivalent lens of the AR head-up display optical-mechanical system; Figure 7 It is a three-dimensional equivalent virtual model of the display device of the embodiment of the present application. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described here are only used to illustrate and explain the present application and are not used to limit the present application. In this application, the various embodiments can be combined with each other but will not be repeated one by one. In addition, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the drawings; while "inner" and "outer" refer to the outline of the device; the terms "first", "second", "third", etc. are used only as labels and do not impose numerical requirements or establish an order.

[0020] The present application provides a display device and a method for manufacturing the same, which are described in detail below. It should be noted that the order in which the following embodiments are described does not limit the preferred order of the embodiments.

[0021] Please refer to Figure 1 and Figure 2 , an embodiment of the present application provides a display device 100 , which includes a display module 10 and an imaging component 20 .

[0022] The display module 10 includes a display panel 11 and a lens barrier layer 12, which is disposed on the light-emitting side of the display panel 11. The display panel 11 is configured to display a first image and a second image. The lens barrier layer 12 is configured to separate the first image and the second image, forming the first image and the second image with parallax.

[0023] The imaging member 20 is configured to reflect the first image and the second image having parallax to an eyeball or an eye box to form a three-dimensional virtual image.

[0024] It should be noted that, taking the eyeball receiving the image as an example, the lens grating layer 12 is used to split the image light displayed by the display panel 11, so that after the image light is reflected by the imaging component 20, the first image finally enters the left eye and the second image enters the right eye. Since the first image and the second image have parallax, and the contents of the two images are at least partially the same, the objects seen by the user have a sense of depth and space, and the images seen by the left eye and the right eye are combined in the user's brain into a stereoscopic picture with a sense of depth, achieving a three-dimensional display effect.

[0025] Taking the eyebox receiving an image as an example, the eyebox is divided into a left area and a right area. A lens grating layer 12 is used to split the image light displayed by the display panel 11. After the image light is reflected by the imaging member 20, the first image enters the left area of the eyebox, and the second image enters the right area of the eyebox. This allows the left and right eyes to see images of the same object from different angles. By controlling the left and right parallax images on the virtual image plane, a 3D display effect is achieved, both on and off the screen.

[0026] Optionally, in some embodiments, the lens grating layer 12 includes a plurality of lenses 121, and the plurality of lenses 121 are arranged along the first direction. The display panel 11 includes a plurality of pixel units 10a, and each pixel unit 10a corresponds to one lens 121. That is, one lens 121 performs patterned light splitting on one pixel unit 10a.

[0027] The pixel unit 10a includes a first pixel 101 and a second pixel 102. The first pixel 101 is configured to display a first image, and the second pixel 102 is configured to display a second image. The first pixel 101 is arranged on one side of the optical axis of the lens 121, and the second pixel 102 is arranged on the other side of the optical axis of the lens 121.

[0028] It should be noted that the optical axis of the lens 121 passes through the focus of the lens 121 and coincides with the center line of the lens 121 .

[0029] Optionally, in the pixel unit 10a, the number of first pixels 101 and second pixels 102 is set according to actual conditions. For example, a pixel unit 10a includes a first pixel 101 and a second pixel 102. For another example, a pixel unit 10a includes at least two first pixels 101 and at least two second pixels 102. For another example, in a pixel unit 10a, the number of first pixels 101 and the number of second pixels 102 can be the same or different.

[0030] Optionally, the lens 121 is a cylindrical lens.

[0031] Optionally, in some embodiments, the lens grating layer 12 further includes a light-transmitting substrate 122 , and the plurality of lenses 121 are arranged on a side of the light-transmitting substrate 122 away from the display panel 11 .

[0032] Optionally, in some embodiments, the lens grating layer 12 further includes a protective layer 123 , and the protective layer 123 covers a side of the lens 121 away from the light-transmitting substrate 122 to protect the lens 121 .

[0033] Optionally, in some embodiments, the lens 121 may also be formed directly on the display panel 11 to save the light-transmitting substrate 122 .

[0034] Optionally, in some embodiments of the present application, the imaging member 20 is a windshield of a vehicle, such as a car, motorcycle, bicycle, boat, or aircraft, etc. In other embodiments, the imaging member 20 may also be other members with light-transmitting and light-reflecting functions.

[0035] Optionally, in some embodiments of the present application, the display device 100 further includes a reflector assembly 30 , and the reflector assembly 30 is configured to reflect the first image and the second image having parallax to the imaging member 20 .

[0036] It is understood that a reflector assembly 30 is provided in the optical path between the imaging member 20 and the display module 10 to achieve multi-focal plane display. The reflector assembly can be adjusted instead of adjusting the main mirror, reducing the difficulty of mechanical adjustment.

[0037] Optionally, the reflector assembly 30 includes a first reflector 31 and a second reflector 32, wherein the first reflector 31 is disposed on the light-emitting side of the display module 10. The first image and the second image sequentially pass through the first reflector 31, the second reflector 32 and the imaging member 20 and enter the eyeball or eye box.

[0038] Optionally, the first reflector 31 may be a plane mirror, a convex mirror, or a concave mirror. The second reflector 32 may be a concave mirror.

[0039] Optional, please refer to Figure 2 In some embodiments of the present application, on the optical axis of the lens 121 , the distance from the intersection Q of the arc surface of the lens 121 and the optical axis of the lens 121 to the pixel of the display panel 11 is a first distance H.

[0040] The width D of the lens 121 satisfies the first relationship: D=2H×tanθ′, θ′=arcsin[(sinθ) / n0].

[0041] Wherein, D is the width of the lens 121, H is the first distance, θ is the half field of view angle of the display device 100, and n0 is the refractive index of at least one transparent film layer located on the light-emitting side of the pixel in the display module 10 as a transparent medium body, and the transparent medium body includes at least the lens grating layer 12.

[0042] It can be understood that, based on the fact that one pixel unit 10a corresponds to one lens 121, the first pixel 101 and the second pixel 102 are located on both sides of the optical axis of the lens 121. Therefore, the display device 100 of the embodiment of the present application satisfies the first relationship by setting the width D of the lens 121, thereby reducing the risk of light crosstalk between two adjacent pixel units 10a and improving the ability of the lens 121 to distribute the first image and the second image, thereby reducing the risk of crosstalk between the first image and the second image, thereby improving the three-dimensional display effect.

[0043] The display panel 11 can be a liquid crystal panel, an organic light-emitting panel, a quantum dot light-emitting panel, or a micro-light-emitting diode panel. Taking an organic light-emitting panel as an example, a pixel is the portion of the organic light-emitting layer located within the opening of the pixel definition layer. Therefore, the light-transmitting film layers located on the light-emitting side of the pixel in the display module 10 include a cathode layer, an encapsulation layer, an optical adhesive layer, a cover plate, and a lens grating layer. Therefore, in addition to the lens grating layer, the light-transmitting dielectric body can also include at least one of the cathode layer, encapsulation layer, optical adhesive layer, and cover plate.

[0044] Alternatively, in some embodiments, the light-transmitting dielectric body comprises all light-transmitting film layers located on the light-emitting side of the pixel in the display module 10. This allows for a more precise angle of incidence θ′ of light emitted from the pixel (light-emitting layer) from the light-transmitting dielectric body to the interface between the light-transmitting dielectric body and air, based on the refractive index n0 of the light-transmitting dielectric body. The half-viewing angle θ of the display device 100 serves as the refraction angle at the interface between the light-transmitting dielectric body and air.

[0045] Therefore, when the half-viewing angle θ and the refractive index n0 of the light-transmitting medium are known, the incident angle θ′ can be obtained according to Snell's law.

[0046] It is understood that according to Snell's law, combined with the refractive index relationship of each transparent film layer in the transparent medium, the incident angle θ' at the interface between the transparent medium and air can be calculated. The half-viewing angle θ of the display device 100 is the refractive angle of the light emitted at the interface between the transparent medium and air.

[0047] In some embodiments of the present application, the embodiments of the present application take the uniform refractive index n0 of the light-transmitting medium as the object, simplifying the light refraction relationship between each film layer.

[0048] Optionally, in some embodiments of the present application, the plurality of lenses 121 may be arranged continuously along the first direction, that is, the plurality of lenses 121 may be arranged periodically according to the width D.

[0049] Optionally, in some embodiments of the present application, 50 microns ≤ D ≤ 300 microns, and 100 microns ≤ H ≤ 1500 microns.

[0050] For example, the width D of the lens 121 can be 50 microns, 60 microns, 70 microns, 80 microns, 90 microns, 100 microns, 110 microns, 120 microns, 130 microns, 140 microns, 150 microns, 160 microns, 170 microns, 180 microns, 190 microns, 200 microns, 210 microns, 220 microns, 230 microns, 240 microns, 250 microns, 260 microns, 270 microns, 280 microns, 290 microns or 300 microns.

[0051] The first distance H may be 100 micrometers, 120 micrometers, 140 micrometers, 150 micrometers, 160 micrometers, 180 micrometers, 200 micrometers, 220 micrometers, 240 micrometers, 250 micrometers, 260 micrometers, 280 micrometers, 300 micrometers, 320 micrometers, 340 micrometers, 350 micrometers, 360 micrometers, 380 micrometers, 400 micrometers, 420 micrometers, 440 micrometers, 450 micrometers, 460 micrometers, 480 micrometers, 500 micrometers, 520 micrometers, 540 micrometers, 550 micrometers, 560 micrometers, 580 micrometers, 600 micrometers, 620 micrometers, 640 micrometers, 650 micrometers, 660 micrometers, 680 micrometers, 700 micrometers, 720 micrometers, 740 micrometers, 750 micrometers, 760 micrometers, 780 micrometers, 800 micrometers, 820 micrometers, 840 micrometers, 0 microns, 1200 microns, 1240 microns, 1250 microns, 1260 microns, 1280 microns, 1300 microns, 1320 microns, 1340 microns, 1350 microns, 1360 microns, 1380 microns, 1400 microns, 1420 microns, 1440 microns, 1450 microns, 1460 microns, 1480 microns, or 1500 microns.

[0052] Optionally, in some embodiments of the present application, the focal length of the lens 121 is equal to the first distance H.

[0053] The curvature radius of the lens 121 satisfies the second relationship: R=flens×(n1−n2) / n2.

[0054] Wherein, R is the curvature radius of the lens 121 , flens is the focal length of the lens 121 , n1 is the refractive index of the lens 121 , n2 is the refractive index of the light-transmitting substrate 122 , and n1>n2.

[0055] It can be understood that the curvature radius R of the lens 121 satisfies the second relationship, so that in the optical path where the lens 121 and the transparent substrate 122 are closely combined, the focal length change caused by the change in the refractive index of the transparent substrate 122 can be compensated by adjusting the curvature radius R, thereby achieving more accurate parallax separation and reducing the risk of optical crosstalk between the first image and the second image.

[0056] Optionally, in some embodiments, the curvature radius R of the lens 121 is smaller than the focal length flens of the lens 121 .

[0057] Optionally, in some embodiments, the curvature radius R of the lens 121 is equal to the focal length flens of the lens 121, so that the spherical aberration of the lens 121 is minimized, the light deviation angle of the edge pixels is smaller, the crosstalk between the left and right eye images (the first image and the second image) is reduced, and the clarity of the three-dimensional image is improved.

[0058] Optionally, the light-transmitting substrate 122 may be provided on the display panel 11 , or may be used together with other components of the display panel 11 . For example, a cover plate may be used as the light-transmitting substrate 122 .

[0059] Alternatively, in some embodiments of the present application, 50 μm ≤ R ≤ 300 μm. For example, the radius of curvature R of the lens 121 may be 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 110 μm, 120 μm, 130 μm, 140 μm, 150 μm, 160 μm, 170 μm, 180 μm, 190 μm, 200 μm, 210 μm, 220 μm, 230 μm, 240 μm, 250 μm, 260 μm, 270 μm, 280 μm, 290 μm, or 300 μm.

[0060] Optionally, in some embodiments, the refractive index n1 of the lens 121 is between 1.55 and 1.8, for example, it can be 1.55, 1.56, 1.57, 1.58, 1.59, 1.6, 1.61, 1.62, 1.63, 1.64, 1.65, 1.66, 1.57, 1.68, 1.69, 1.7, 1.71, 1.72, 1.73, 1.74, 1.75, 1.76, 1.77, 1.78, 1.79 or 1.8.

[0061] Optionally, in some embodiments, the refractive index n2 of the transparent substrate 122 is between 1.3 and 1.5, for example, it can be 1.3, 1.31, 1.32, 1.33, 1.34, 1.35, 1.36, 1.37, 1.38, 1.39, 1.4, 1.41, 1.42, 1.43, 1.44, 1.45, 1.46, 1.47, 1.48, 1.49 or 1.5.

[0062] Please refer to Figure 3 Optionally, in some embodiments of the present application, on the optical axis of the lens 121, the height of the lens 121 satisfies the third relationship: ; Here, h1 is the height of the lens 121 .

[0063] It is understood that the height h1 of lens 121 can be determined based on the determination of the curvature radius R and width D of lens 121. The height of lens 121 satisfies the third relationship, thereby reducing the risk of light crosstalk between the first image and the second image while preventing the design of the height h1 of lens 121 from affecting the curvature radius R of lens 121.

[0064] Please refer to Figure 4 , Figure 4 FIG2 shows a simulation effect diagram of the first image (red) and the second image (blue) after light splitting of the display device 100 according to an embodiment of the present application. Figure 3 It can be seen that the anti-crosstalk effect of the first image and the second image of the display device 100 in the embodiment of the present application is improved to a certain extent, thereby enhancing the three-dimensional display effect.

[0065] Please refer to Figure 5 Accordingly, the embodiment of the present application further provides a method for manufacturing a display device 100, which includes the following steps: In step B1, a lens grating layer 12 is disposed on the light-emitting side of a display panel 11 to form a display module 10. The display panel 11 is configured to display a first image and a second image. The lens grating layer 12 is configured to separate the first image and the second image and form the first image and the second image with parallax. The lens grating layer 12 includes a plurality of lenses 121.

[0066] In step B2 , an imaging member 20 is provided. The imaging member 20 is configured to reflect the first image and the second image having parallax to an eyeball or an eye box to form a three-dimensional virtual image.

[0067] It should be noted that the manufacturing method of the display device 100 of this embodiment is used to manufacture the display device 100 of the above embodiment. For the specific structure of the display device 100, please refer to Figures 1 to 2 The following description will be made by taking the display device 100 as an example of an AR head-up display.

[0068] Before preparing the lens grating layer 12 of the display device 100 of the above embodiment, a calculation model and a three-dimensional equivalent virtual model of the equivalent lens of the AR head-up display optical machine system can be established. Figure 6 , Figure 6 The figure shows the calculation model of the equivalent lens of the AR head-up display optical system. Figure 6 Different display screen positions are used for schematic illustration.

[0069] exist Figure 6In the equation ( ), L1 is the position of display screen 1 relative to the imaging lens, L11 is the position of display screen 2 relative to the imaging lens, and both L1 and L11 are less than the focal length fe. Δ1 is the distance between display screens 1 and 2. L′1 is the first virtual image plane corresponding to the position of display screen 1, L′11 is the second virtual image plane corresponding to the position of display screen 2, and Δ′1 is the distance between the first and second virtual image planes. M1 and M11 are the image magnifications under two different imaging conditions, respectively. The following formulas provide the effective focal length (fe), imaging object distance (L1 and L11), and image distance (L′1 and L′11) of the optomechanical system.

[0070] 1 / L′1 +1 / L1 =1 / fe; 1 / L′11 +1 / L11 =1 / fe; M1=L′1 / L1; M11=L′11 / L11; △1=L 11- L 1; △′1= L′11- L′1.

[0071] According to the above formula, we can get: Imaging object distance L1=(△′1- M11×△1) / (M11-M1)=K; image distance L′1= M1×K; effective focal length fe=M1×K / (1+M1).

[0072] Please continue to refer to Figure 7 , Figure 7 The figure shows a three-dimensional equivalent virtual model of the display device 100 according to an embodiment of the present application, wherein the imaging lens is equivalent to the reflector assembly 30 + the imaging component 20 , and the display screen is equivalent to the display module 10 .

[0073] exist Figure 7 In the equation ( ), W1 and W′1 correspond to the width of the display screen and the displayed virtual image, respectively; L1 and L′1 correspond to the distances of the display screen and the displayed virtual image relative to the imaging lens, respectively; W2 and W′2 correspond to the widths of the eyebox and the eyebox virtual image, respectively; L0 is the distance from the eyebox to the displayed virtual image; L2 and L′2 correspond to the distances of the eyebox and the eyebox virtual image relative to the imaging lens, respectively; and Δ2 is the distance between the display screen and the eyebox virtual image.

[0074] The width W′2 of the eyebox virtual image is the viewing area for 3D display, and the distance △2 from the display screen is the design parameter for the optimal viewing position. Here, L2 = L0-L′1, and 1 / L′2 + 1 / L2 = 1 / fe.

[0075] Based on Figure 6 The calculation results of the equivalent lens in , we can get the following relationship: M2=L′2 / L2 = fe / (L 0- M1× K - fe); △2= L′2-L1; W′2= M2×W2.

[0076] Please refer to Figure 2 Optionally, in some embodiments of the present application, preparing the lens grating layer 12 includes the following steps: Step B01, obtain the set distance H y , the half viewing angle θ of the display device 100 y and the set refractive index n0 of the transparent medium y . Set distance H y It is the set distance from the intersection of the arc surface of the lens of the lens grating layer 12 and the optical axis of the lens 121 to the pixel of the display panel. The transparent medium body is at least a transparent film layer located on the light-emitting side of the pixel in the display module, and the transparent medium body at least includes the lens grating layer 12.

[0077] In step B01 , before manufacturing the display device 100 , parameters such as the optical structure parameters and the half field of view setting angle of the display device 100 may be obtained.

[0078] It is understood that the half field of view of the display device 100 is set at an angle θ y It can be a pre-set specification parameter, based on which the half field of view setting angle θ y Can be obtained directly from the specification parameters.

[0079] In addition, in some embodiments, the half field of view of the display device 100 is set at an angle θ y It can also be obtained based on a three-dimensional equivalent virtual model of the display device 100 .

[0080] For example, optionally, the half field of view setting angle θ of the display device 100 is obtained. y , including the following steps: In step B011 , according to the three-dimensional equivalent virtual model of the display device 100 , a width W′2 of the eye box virtual image and a distance Δ2 from the eye box virtual image to the virtual display module are obtained.

[0081] Step B012, according to the width W′2 of the eye box virtual image and the virtual image of the eye box to the virtual display module ( Figure 7 The distance between the display screen and the display screen is △2, combined with the formula: tanθ y =( W′2) / (2×Δ2), the half viewing angle θ of the display device 100 is obtained. y (See Figure 2 ).

[0082] It should be noted that the half field of view setting angle θ y Equivalent to half field of view angle θ. Under ideal conditions, half field of view setting angle θ y Equal to the half field of view angle θ.

[0083] Then go to step B02.

[0084] Step B02, according to equation 1: D y =2H y ×tanθ y ′ and the modified formula of Snell's law: θ y ′=arcsin[(sinθ y ) / n0 y ], and obtain the set width D of the lens 121 y .

[0085] Step B03, set the width D as described above y A lens 121 is prepared.

[0086] It can be understood that, based on the fact that one pixel unit 10a corresponds to one lens 121, the first pixel 101 and the second pixel 102 are located on both sides of the optical axis of the lens 121. Therefore, the display device 100 of the embodiment of the present application is configured with the width D set above. y The lens 121 is prepared to reduce the risk of light crosstalk between two adjacent pixel units 10a and improve the ability of the lens 121 to distribute the first image and the second image, thereby reducing the risk of crosstalk between the first image and the second image and improving the three-dimensional display effect.

[0087] Optionally, the set width D of the lens 121 y Equal to the width D of lens 121.

[0088] Optionally, in some embodiments, the lens grating layer 12 further includes a light-transmitting substrate 122 , and the plurality of lenses 121 are arranged on a side of the light-transmitting substrate 122 away from the display panel 11 .

[0089] Based on this, step B01 also includes: obtaining the set focal length flens of the lens 121 y , the set refractive index n1 of lens 121 y and the set refractive index n2 of the light-transmitting substrate 122 y .

[0090] Step B02 also includes: according to the second relationship: R y =flens y ×(n1 y -n2 y ) / n2 y , and obtain the set curvature radius R of lens 121 y .

[0091] Step B03 also includes: setting the curvature radius R according to the y A lens 121 is prepared.

[0092] It is understood that the set curvature radius R of the lens 121 is ySatisfying the relational expression 2, in the optical path where the lens 121 and the light-transmitting substrate 122 are closely combined, by setting the curvature radius R y The adjustment compensates for the focal length change caused by the change in the refractive index of the transparent substrate 122, achieves more accurate parallax separation, and reduces the risk of optical crosstalk between the first image and the second image.

[0093] Optionally, the curvature radius R of the lens 121 is set to y is equal to the curvature radius R of lens 121 .

[0094] Optionally, in some embodiments, the set curvature radius R of the lens 121 is y It is equal to the set focal length of the lens 121, so that the spherical aberration of the physical lens 121 is minimized, the light deviation angle of the edge pixels is smaller, the crosstalk between the left and right eye images (the first image and the second image) is reduced, and the clarity of the three-dimensional image is improved.

[0095] Optionally, in some embodiments of the present application, step B02 further includes: according to the set width D y and the set curvature radius R y , combined with equation three: , get the set height h1 of lens 121 y .

[0096] Step B03 also includes: setting the height h1 y A lens 121 is prepared.

[0097] Optionally, the height h1 of the lens 121 is set to y Equal to the height h1 of the lens 121.

[0098] That is, the lens 121 is set at the height h1 y , the set curvature radius R y and the set width D y The preparation is formed on the light-transmitting substrate 122.

[0099] The display device of the present embodiment includes a display module and an imaging component. The display module includes a display panel and a lens grating layer. The display panel 11 is configured to display a first image and a second image of the same screen. The lens grating layer 12 is configured to separate the first image and the second image, forming the first image and the second image with parallax. The imaging component is configured to reflect the first image and the second image with parallax to the eyeball or eye box to form a three-dimensional virtual image. The width of the lens 121 satisfies the first relationship: D = 2H × tanθ′, θ′ = arcsin [(sinθ) / n0].

[0100] It can be understood that, based on the fact that one pixel unit corresponds to one lens, each pixel unit includes a first pixel and a second pixel, and the first pixel and the second pixel are located on both sides of the optical axis of the lens 121. Therefore, the display device of the embodiment of the present application satisfies the first relationship by setting the width of the lens 121, thereby reducing the risk of light crosstalk between two adjacent pixel units and improving the ability of the lens to distribute the first image and the second image, thereby reducing the risk of crosstalk between the first image and the second image, thereby improving the three-dimensional display effect.

[0101] The above is a detailed introduction to a display device and a preparation method thereof provided in an embodiment of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, based on the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A display device, characterized in that: include: A display module includes a display panel and a lens grating layer, wherein the lens grating layer is disposed on a light-emitting side of the display panel, the display panel is configured to display a first image and a second image, and the lens grating layer is configured to separate the first image and the second image and form the first image and the second image with parallax; an imaging member configured to reflect the first image and the second image having parallax to an eyeball or an eye box to form a three-dimensional virtual image; The lens grating layer includes a plurality of lenses, and on the optical axis of the lens, the distance from the intersection of the arc surface of the lens and the optical axis of the lens to the pixel of the display panel is a first distance; The width of the lens satisfies the first relationship: D=2H×tanθ′, θ′=arcsin[(sinθ) / n0]; Wherein, D is the width of the lens, H is the first distance, θ is the half field of view angle of the display device, n0 is the refractive index of at least one transparent film layer located on the light-emitting side of the pixel in the display module as a transparent medium body, and the transparent medium body includes at least the lens grating layer.

2. The display device according to claim 1, wherein 50 microns ≤ D ≤ 300 microns, 100 microns ≤ H ≤ 1500 microns.

3. The display device according to claim 1, wherein The lens grating layer further includes a light-transmitting substrate, a plurality of lenses are arranged on a side of the light-transmitting substrate away from the display panel, and a focal length of the lens is equal to the first distance; The curvature radius of the lens satisfies the second relationship: R=flens×(n1-n2) / n2; Wherein, R is the curvature radius of the lens, flens is the focal length of the lens, n1 is the refractive index of the lens, n2 is the refractive index of the light-transmitting substrate, and n1>n2.

4. The display device according to claim 3, wherein: 50 microns ≤ R ≤ 300 microns.

5. The display device according to claim 3, wherein On the optical axis of the lens, the height of the lens satisfies the third relationship: ; Wherein, h1 is the height of the lens.

6. The display device according to any one of claims 1 to 5, characterized in that: The display device further includes a mirror assembly configured to reflect the first image and the second image having parallax to the imaging member.

7. The display device according to claim 6, wherein: The imaging member is a windshield plate of a vehicle.

8. A method for preparing a display device, characterized in that: The following steps are involved: A lens grating layer is provided on a light-emitting side of a display panel to form a display module. The display panel is configured to display a first image and a second image. The lens grating layer is configured to separate the first image and the second image and form the first image and the second image with parallax. The lens grating layer includes a plurality of lenses. providing an imaging member configured to reflect the first image and the second image having parallax to an eyeball or an eye box to form a three-dimensional virtual image; The preparation of the lens grating layer comprises the following steps: Get the set distance H y , the half field of view setting angle θ of the display device y and the set refractive index n0 of the transparent medium y , set the distance H y The set distance is the intersection of the arc surface of the lens of the lens grating layer and the optical axis of the lens to the pixel of the display panel, and the light-transmitting medium is at least one light-transmitting film layer located on the light-emitting side of the pixel in the display module, and the light-transmitting medium at least includes the lens grating layer; According to the relationship formula 1: D y =2H y ×tanθ y ′ and the modified formula of Snell's law: θ y ′=arcsin[(sinθ y ) / n0 y ], and obtain the set width D of the lens y ; According to the setting width D y The lens is prepared.

9. The method for manufacturing a display device according to claim 8, wherein: The lens grating layer further includes a light-transmitting substrate, and the plurality of lenses are arranged on a side of the light-transmitting substrate away from the display panel; preparing the lens grating layer includes the following steps: Get the set focal length flens of the lens y , the set refractive index n1 of the lens y and the set refractive index n2 of the light-transmitting substrate y ; According to the relationship formula 2: R y =flens y ×(n1 y -n2 y ) / n2 y , get the set curvature radius R of the lens y ; According to the setting curvature radius R y The lens is prepared.

10. The method for manufacturing a display device according to claim 9, wherein: The preparation of the lens grating layer comprises the following steps: According to the setting width D y and the set curvature radius R y , combined with equation three: , get the set height h1 of the lens y ; According to the setting height h1 y The lens is prepared.

11. The method for manufacturing a display device according to claim 8, wherein: Get the half field of view setting angle θ of the display device y , including the following steps: According to the equivalent virtual model of the display device, obtaining the width W′2 of the eye box virtual image and the distance Δ2 from the eye box virtual image to the virtual display module; According to the width W′2 of the eye box virtual image and the distance △2 from the eye box virtual image to the virtual display module, combined with the formula: tanθ y =( W′2 ) / (2×△2), and the half-viewing angle θ of the display device is obtained y .

Images