Display module and display device

Abstract

According to the display module and the display device, a metasurface structure layer is arranged on the side, away from a display panel, of a lens layer, a dimming part is correspondingly arranged on the light emitting side of a lens, and a nano-column unit of the dimming part is arranged on a light emitting path, passing through the lens layer, of a sub-pixel. Based on the central emergent light of the same sub-pixel, the deflection angle of the lens to the emergent light of the sub-pixel is a first deflection angle, the deflection angle of the nano-column unit to the emergent light of the sub-pixel through the lens layer is a second deflection angle, and the second deflection angle is smaller than the first deflection angle. According to the embodiment of the invention, the metasurface structure layer is arranged on the light emitting side of the lens layer, and the metasurface structure layer is used for performing fine adjustment deflection on the emergent light of the sub-pixels, so that the deflection angle of the emergent light of the sub-pixels can be improved, the range of expanding the viewpoint viewing angle can be expanded, and the overall resolution of an image does not need to be sacrificed; and the risk of light crosstalk can be reduced by finely adjusting the emergent light passing through the lens layer.

Description

TECHNICAL FIELD

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

[0002] The cylindrical lens array naked eye three-dimensional display technology has attracted much attention because it can present a stereoscopic effect without wearing special glasses. The basic principle of this technology is that different images of different viewpoints on a display panel are guided to different horizontal directions through the optical refraction of a cylindrical lens, so that the left eye and the right eye of a viewer receive different images with parallax, thereby forming a stereoscopic vision in the brain.

[0003] However, due to the inherent parameters such as curvature, refractive index and physical size of the cylindrical lens, the central angle range of each viewpoint beam emitted by the cylindrical lens is limited. This results in that a good three-dimensional effect can only be obtained within a limited "best viewing zone" in front. Once the viewer deviates from this area, serious image crosstalk and ghosting will immediately occur, resulting in the loss of stereoscopic effect and even causing visual fatigue.

[0004] In the prior art, in order to improve the viewing angle, the method of increasing the number of viewpoints is usually adopted. However, this method has inherent contradictions: under the premise of fixed display screen resolution, increasing the number of viewpoints will result in a decrease in the number of pixels that can be allocated to each viewpoint, thereby sacrificing the overall resolution of the image. SUMMARY

[0005] Embodiments of the present application provide a display module and a display device to at least partially solve the above technical problems.

[0006] In order to achieve the above purpose, according to a first aspect of the present application, a display module configured to display a three-dimensional image is provided, the display module comprising: a display panel comprising a plurality of pixel units, each of the pixel units comprising a plurality of sub-pixels; a lens layer disposed on the light-emitting side of the display panel, the lens layer comprising a plurality of lenses, one of the lenses corresponding to covering one of the pixel units, the lens being configured to deflect the angle of the emitted light of the sub-pixel; a metasurface structure layer disposed on the side of the lens layer away from the display panel, the metasurface structure layer comprising a plurality of light adjusting portions, one of the light adjusting portions being disposed on the light-emitting side of one of the lenses, the light adjusting portion comprising a plurality of nano-pillar units, one of the nano-pillar units being disposed on the light path of one of the sub-pixels through the lens layer, the nano-pillar unit being configured to deflect the emitted light through the lens layer; Specifically, based on the center emitted light of the same sub-pixel, the deflection angle of the emitted light from the sub-pixel by the lens is a first deflection angle, and the deflection angle of the emitted light from the sub-pixel through the lens layer by the nanopillar unit is a second deflection angle, the second deflection angle being smaller than the first deflection angle.

[0007] Optionally, in some embodiments of this application, in the same lens, the first deflection angle of the lens decreases in the direction from both sides of the lens toward the center of the lens; In the same dimming section, the second deflection angle of two adjacent nanopillar units decreases in the direction from both sides of the dimming section toward the center of the dimming section.

[0008] Optionally, in some embodiments of this application, in the same lens, the first deflection angle of the lens decreases in the direction from both sides of the lens toward the center of the lens; In the same dimming section, in the direction from both sides of the dimming section toward the center of the dimming section, two adjacent nanopillar units have the same second deflection angle.

[0009] Optionally, in some embodiments of this application, a sub-pixel and the corresponding nanopillar unit that deflects its emitted light form an optical path assembly; In one of the optical path components, the center line of the sub-pixel and the center line of the nanopillar unit are offset by a distance, and the center line of the nanopillar unit of the same optical path component is closer to the center line of the lens than the center line of the sub-pixel.

[0010] Optionally, in some embodiments of this application, among the plurality of optical path components corresponding to the same pixel unit, the offset distance between two adjacent sets of optical path components decreases from the direction of the sides of the lens to the direction of the center of the lens.

[0011] Optionally, in some embodiments of this application, in the same pixel unit, the center distance between the two outermost sub-pixels is a first distance, and in the direction of the deflected light of the same dimming part, the center distance between the two outermost nanopillar units is a second distance, the second distance being less than the first distance.

[0012] Optionally, in some embodiments of this application, in a pixel unit, a plurality of sub-pixels include a first sub-pixel, a second sub-pixel, and a third sub-pixel; in a dimming unit, a plurality of nanopillar units include a first nanopillar unit, a second nanopillar unit, and a third nanopillar unit; the first nanopillar unit deflects the emitted light of the first sub-pixel, the second nanopillar unit deflects the emitted light of the second sub-pixel, and the third nanopillar unit deflects the emitted light of the third sub-pixel; the first nanopillar unit includes periodically arranged nanopillars, the second nanopillar unit includes periodically arranged nanopillars, and the third nanopillar unit includes periodically arranged nanopillars. The emitted light colors of the first sub-pixel, the second sub-pixel, and the third sub-pixel are all different, and the nanopillar arrangement patterns of the first nanopillar unit, the second nanopillar unit, and the third nanopillar unit are all different.

[0013] Optionally, in some embodiments of this application, in the nanopillar unit, the lattice period of the nanopillar is between 200 nanometers and 600 nanometers, the width of the nanopillar is between 50 nanometers and 250 nanometers, and the height of the nanopillar is between 400 nanometers and 1000 nanometers.

[0014] Optionally, in some embodiments of this application, the metasurface structure layer further includes a substrate, the dimming part is disposed on the side of the substrate away from the lens layer, and the refractive index of the substrate is less than the refractive index of the nanopillar.

[0015] According to a second aspect of this application, a display device is provided, which includes a display module as described in any of the above embodiments.

[0016] In the display module and display device of this application embodiment, a metasurface structure layer is provided on the side of the lens layer away from the display panel. The metasurface structure layer includes a plurality of dimming units, one of which is correspondingly disposed on the light-emitting side of a lens. Each dimming unit includes a plurality of nanopillar units, and one nanopillar unit is disposed in the light-emitting path of a sub-pixel through the lens layer. The nanopillar unit is configured to deflect the emitted light through the lens layer. Based on the center emitted light of the same sub-pixel, the deflection angle of the emitted light of the sub-pixel by the lens is a first deflection angle, and the deflection angle of the emitted light of the sub-pixel through the lens layer by the nanopillar unit is a second deflection angle, wherein the second deflection angle is smaller than the first deflection angle.

[0017] In other words, the display module and display device of this application embodiment provide a metasurface structure layer on the light-emitting side of the lens layer, and use the metasurface structure layer to finely adjust and deflect the emitted light of the sub-pixels. This not only increases the deflection angle of the emitted light of the sub-pixels, thus expanding the viewing angle range, but also, based on the high precision of the metasurface structure layer, allows for more subtle adjustments to the light. Therefore, fine-tuning the emitted light through the lens layer can better reduce the risk of light crosstalk.

[0018] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description 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 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.

[0019] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0020] Figure 1 This is a schematic diagram of the structure of the display module provided in an exemplary embodiment of this disclosure; Figure 2 This is a schematic diagram of the light-emitting optical path corresponding to the pixel unit of the display module provided in the exemplary embodiments of this disclosure; Figure 3 This is a schematic diagram of the structure corresponding to the pixel unit of the display module provided in the exemplary embodiments of this disclosure; Figure 4 This is a schematic diagram of the structure of a single pixel unit corresponding to a viewpoint in the display module provided in an exemplary embodiment of this disclosure; Figure 5 This is a schematic diagram of the structure of the nanopillar unit of the display module provided in an exemplary embodiment of this disclosure; Figure 6 This is a schematic diagram of the structure of a display device provided in an exemplary embodiment of this disclosure.

[0021] Explanation of reference numerals in the attached figures: Display module 100; display panel 10; pixel unit 10p; lens layer 20; lens 20t; metasurface structure layer 30; dimming unit 30g; nanopillar unit 31; nanopillar 311; substrate 32; first direction F1; sub-pixel p1; first sub-pixel pr; second sub-pixel pg; third sub-pixel pb; optical path component z1; offset distance v; first distance L1; second distance L2; first nanopillar unit 31r; second nanopillar unit 31g; third nanopillar unit 31b; display device 1000. Detailed Implementation 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 them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0022] This application provides a display module 100; please refer to [link / reference]. Figures 1 to 3 , Figure 1 This is a schematic diagram of the structure of the display module 100 provided in the embodiments of this application. Figure 2 This is a schematic diagram of the light-emitting optical path corresponding to the pixel unit 10p of the display module 100 provided in the exemplary embodiment of this disclosure; Figure 3 This is a schematic diagram of the structure corresponding to the pixel unit 10p of the display module 100 provided in the exemplary embodiment of this disclosure.

[0023] This application provides a display module 100 configured to display three-dimensional images.

[0024] The display module 100 includes a display panel 10, a lens layer 20, and a metasurface structure layer 30.

[0025] The display panel 10 includes a plurality of pixel units 10p, and each pixel unit 10p includes a plurality of sub-pixels p1.

[0026] The display panel 10 can be a liquid crystal panel or an electroluminescent panel or other panel with display function.

[0027] Optionally, the display panel 10 has multiple pixel units 10p, and the number of sub-pixels p1 in each pixel unit 10p can be set according to the actual number of viewpoints required. For example... Figure 3 As shown, the following description uses a display module 100 with four viewpoints as an example, but it is not limited to this.

[0028] Optionally, the sub-pixels p1 in pixel unit 10p are arranged in an array. The column-oriented sub-pixels p1 are arranged along the first direction F1. The sub-pixels p1 in the same column have the same emitted light color, while the sub-pixels p1 in adjacent columns have different emitted light colors.

[0029] Optionally, the multiple sub-pixels p1 include a first sub-pixel pr, a second sub-pixel pg, and a third sub-pixel pb. The emitted light colors of the first sub-pixel pr, the second sub-pixel pg, and the third sub-pixel pb are all different.

[0030] The following explanation uses the example of the first sub-pixel pr being a red light sub-pixel, the second sub-pixel pg being a green light sub-pixel, and the third sub-pixel pb being a blue light sub-pixel, but it is not limited to this.

[0031] In the first direction F1, the first sub-pixel pr, the second sub-pixel pg, and the third sub-pixel pb are arranged in a cyclical order. For example, red sub-pixels, green sub-pixels, blue sub-pixels, red sub-pixels, green sub-pixels, blue sub-pixels, red sub-pixels... In some embodiments, a pixel unit 10p is formed by four consecutive columns of sub-pixels p1, and one column of sub-pixels p1 corresponds to one viewpoint.

[0032] A lens layer 20 is disposed on the light-emitting side of the display panel 10. The lens layer 20 includes a plurality of lenses 20t, each lens 20t corresponding to and covering a pixel unit 10p. The lens 20t is configured to deflect the angle of the emitted light from the pixel p1.

[0033] Optionally, lens 20t is a cylindrical lens. Lens 20t deflects and distributes the outgoing light from the four columns of sub-pixels p1 of a pixel unit 10p to the corresponding four viewpoints.

[0034] The deflection amplitude of lens 20t can be adjusted based on factors such as the surface curvature, thickness, and refractive index of the material of lens 20t.

[0035] A metasurface structure layer 30 is disposed on the side of the lens layer 20 away from the display panel 10. The metasurface structure layer 30 includes a plurality of dimming units 30g. One dimming unit 30g is disposed on the light-emitting side of a lens 20t. The dimming unit 30g includes a plurality of nanopillar units 31. One nanopillar unit 31 is disposed in the light-emitting path of a sub-pixel p1 through the lens layer 20. The nanopillar unit 31 is configured to deflect the emitted light through the lens layer 20.

[0036] Among them, based on the center emitted light of the same sub-pixel p1, the deflection angle of the emitted light of sub-pixel p1 by lens 20t is the first deflection angle, and the deflection angle of the emitted light of sub-pixel p1 through lens layer 20 by nanopillar unit 31 is the second deflection angle, which is smaller than the first deflection angle.

[0037] It is understood that the deflection angle is the difference between the incident angle into the transparent medium and the exit angle from the transparent medium. The second deflection angle is smaller than the first deflection angle, so that the nanopillar unit 31 can fine-tune the outgoing light through the lens 20t. The lens 20t acts so that the angle at which the light rays emanating from the center of sub-pixel p1 enter the lens 20t is smaller than the angle at which the light rays exit the lens 20t, thus deflecting the outgoing light of pixel p1 for the first time. The nanopillar unit 31 of the metasurface structure layer 30 acts so that the angle a of the light rays entering the nanopillar unit 31 is smaller than the angle b of the light rays exiting the nanopillar unit 31, thus deflecting the outgoing light of pixel p1 for the second time.

[0038] That is, the display module 100 of this application embodiment provides a metasurface structure layer 30 on the light-emitting side of the lens layer 20. By using the metasurface structure layer 30 to finely adjust and deflect the emitted light of the sub-pixel p1, it can not only increase the deflection angle of the emitted light of the sub-pixel p1 and expand the range of viewing angles without sacrificing the overall resolution of the image; but also, based on the high precision of the metasurface structure layer 30, it can make more subtle adjustments to the light. Therefore, fine-tuning the emitted light through the lens layer 20 can better reduce the risk of light crosstalk.

[0039] It should be noted that, given the relatively large deflection angle of the emitted light by the lens layer 20, if the lens layer 20 is located on the light-emitting side of the metasurface structure layer 30, the function of the metasurface structure layer 30 in fine-tuning the emitted light will be lost, which would relatively increase the risk of light crosstalk. Therefore, by placing the metasurface structure layer 30 on the light-emitting side of the lens layer 20, at least local adjustments can be made by adjusting at least one of the period between the nanopillars 311 and the aspect ratio of the nanopillars 311 to further reduce the risk of light crosstalk.

[0040] Optionally, in some embodiments of this application, in the same lens 20t, the first deflection angle of the lens 20t decreases from both sides of the lens 20t toward the center of the lens 20t.

[0041] In the same dimming section 30g, the second deflection angle of two adjacent nanopillar units 31 decreases in the direction from both sides of the dimming section 30g toward the center of the dimming section 30g.

[0042] It should be noted that the direction from both sides of lens 20t towards the center of lens 20t is the direction of light deflection. For example, the curvature of the outer surface of lens 20t changes along the horizontal direction, but the curvature does not change in the vertical direction. Therefore, the horizontal direction is the direction of light deflection.

[0043] It is understandable that in a dimming unit 30g, one nanopillar unit 31 corresponds to one sub-pixel p1, that is, each sub-pixel p1 has an independent nanopillar unit 31 for fine-tuning, so that the nanopillar unit 31 deflects the emitted light of a specific sub-pixel p1, which can better correct the subtle deviations caused by the light emitted by the lens 20t, thereby reducing the risk of aberrations and optical crosstalk.

[0044] For example, based on viewpoint requirements, in the horizontal direction of the same pixel unit 10p, the emitted light from sub-pixels p1 closer to the edge will be allocated to viewpoints further away in the opposite direction, such as... Figure 4 As shown, the emitted light from the first sub-pixel p1 on the left needs to be deflected to the fourth viewpoint, and the emitted light from the second sub-pixel p1 on the left needs to be deflected to the third viewpoint. Therefore, the further out the sub-pixel p1 is, the larger the angle of deflection it needs to be.

[0045] Based on this, the emitted light from pixel unit 10p is deflected twice by nanopillar unit 31. Furthermore, based on the needs of each viewpoint, the second deflection angle of nanopillar unit 31 adopts a gradual deflection, which can improve the viewing angle range of each viewpoint while more accurately adjusting the viewing angle range of each viewpoint.

[0046] Optionally, in some embodiments of this application, in the same lens 20t, the first deflection angle of the lens 20t decreases from both sides of the lens 20t toward the center of the lens 20t.

[0047] In the same dimming section 30g, in the direction from both sides of the dimming section 30g toward the center of the dimming section 30g, two adjacent nanopillar units 31 have the same second deflection angle.

[0048] It is understandable that in the same dimming unit 30g, each nanopillar unit 31 has the same deflection capability for light. That is to say, the dimming unit 30g deflects the light emitted from the sub-pixel p1 by the lens 20t with equal amplitude as a reference to improve the viewing angle range of the viewpoint.

[0049] Optionally, in some embodiments of this application, a sub-pixel p1 and a corresponding nanopillar unit 31 that deflects its emitted light form an optical path component z1.

[0050] In an optical path component z1, the center line x1 of sub-pixel p1 and the center line x2 of nanopillar unit 31 have an offset distance v. The center line x2 of nanopillar unit 31 in the same optical path component z1 is closer to the center line x3 of lens 20t than the center line x1 of sub-pixel p1.

[0051] It is understandable that the light emitted from sub-pixel p1 changes after being deflected by lens 20t. Therefore, it is necessary to offset nanopillar unit 31 to adapt to the light output path of sub-pixel p1, so as to more accurately and comprehensively deflect the light output of sub-pixel p1, thereby correcting aberrations and reducing the risk of optical crosstalk.

[0052] Optionally, in some embodiments of this application, among a plurality of optical path components z1 corresponding to the same pixel unit 10p, the offset distance v between two adjacent sets of optical path components z1 decreases from the sides of the lens 20t towards the center of the lens 20t.

[0053] It is understandable that, based on the decreasing deflection amplitude of lens 20t on sub-pixel p1 of pixel unit 10p from both sides to the center, the light emission range of sub-pixel p1 is also shifted after passing through lens 20t, and the shift amplitude is based on the deflection amplitude of lens 20t. Therefore, setting the offset distance v to decrease from both sides to the center can more accurately and comprehensively cover the light emission range of sub-pixel p1, reduce optical crosstalk, and improve the effect of aberration correction.

[0054] Optionally, in some embodiments of this application, in the same pixel unit 10p, the center distance between the two outermost sub-pixels p1 is a first distance L1, and in the direction of the deflected light of the same dimming part 30g, the center distance between the two outermost nanopillar units 31 is a second distance L2. The second distance L2 is less than the first distance L1.

[0055] Understandably, the light emitted from sub-pixel p1 is deflected towards the center by lens 20t, causing the nanopillar unit 31 to also deflect towards the center, thereby reducing the width of the entire dimming section 30g, which in turn reduces the second distance L2 between the nanopillar units 31 on both sides of the dimming section 30g, in order to adapt to the light path deflection of sub-pixel p1.

[0056] Optionally, in some embodiments of this application, in the same lens 20t, the first deflection angle of the lens 20t decreases from both sides of the lens 20t toward the center of the lens 20t.

[0057] In the same dimming section 30g, the lattice period P of two adjacent nanopillar units 31 increases in the direction from both sides of the dimming section 30g toward the center of the dimming section 30g.

[0058] Understandably, according to the generalized Snell's law, when the phase difference between adjacent nanopillars 311 is the same, the smaller the lattice period P, the larger the deflection angle. Therefore, the embodiments of this application, by setting a gradual change in the lattice period P, can more accurately and easily meet the requirements for each deflection angle.

[0059] Optionally, in some embodiments of this application, in a pixel unit 10p, a plurality of sub-pixels p1 include a first sub-pixel pr, a second sub-pixel pg, and a third sub-pixel pb. In a dimming unit 30g, a plurality of nanopillar units 31 include a first nanopillar unit 31r, a second nanopillar unit 31g, and a third nanopillar unit 31b. The first nanopillar unit 31r deflects the emitted light from the first sub-pixel pr, the second nanopillar unit 31g deflects the emitted light from the second sub-pixel pg, and the third nanopillar unit 31b deflects the emitted light from the third sub-pixel pb. The first nanopillar unit 31r includes periodically arranged nanopillars 311. The second nanopillar unit 31g includes periodically arranged nanopillars 311. The third nanopillar unit 31b includes periodically arranged nanopillars 311.

[0060] The emitted light colors of the first sub-pixel pr, the second sub-pixel pg, and the third sub-pixel pb are all different. The nanopillar 311 arrangement patterns of the first nanopillar unit 31r, the second nanopillar unit 31g, and the third nanopillar unit 31b are all different.

[0061] It is understandable that sub-pixels p1 with different emitted light colors correspond to nanopillar units 31 with different nanopillar arrangement patterns, so that nanopillar units 31 can be precisely controlled according to specific color light and specific deflection angle, so that each color light can be emitted to a specific viewpoint after passing through the metasurface structure layer 30, in order to further reduce light crosstalk and improve the effect of aberration correction.

[0062] Please refer to Figure 5 Optionally, in some embodiments of this application, in the nanopillar unit 31, the lattice period P of the nanopillar 311 is between 200 nanometers and 600 nanometers, the width W of the nanopillar 311 is between 50 nanometers and 250 nanometers, and the height H of the nanopillar 311 is between 400 nanometers and 1000 nanometers.

[0063] Optionally, in a nanopillar unit 31, the lattice period P of the nanopillar 311 can be 200 nm, 250 nm, 300 nm, 350 nm, 400 nm, 450 nm, 500 nm, 550 nm, and 600 nm. The width W of the nanopillar 311 can be 50 nm, 100 nm, 150 nm, 200 nm, and 250 nm. The height H of the nanopillar 311 can be 400 nm, 450 nm, 500 nm, 550 nm, 600 nm, 650 nm, 700 nm, 750 nm, 800 nm, 850 nm, 900 nm, 950 nm, and 1000 nm.

[0064] It is understood that this application can adjust at least one of the lattice period P, width W and height H in the nanopillar unit 31 to match the requirements of different deflection angles and different incident wavelengths.

[0065] Optionally, the nanopillar 311 can be cylindrical or rectangular, but is not limited to either. When the nanopillar 311 is cylindrical, its width is its diameter.

[0066] Optionally, in some embodiments of this application, the metasurface structure layer 30 further includes a substrate 32, and the dimming part 30g is disposed on the side of the substrate 32 away from the lens layer 20, and the refractive index of the substrate 32 is less than the refractive index of the nanopillar 311.

[0067] It is understandable that, since the nanopillar unit 31 has the function of deflecting light, the refractive index of the substrate 32 is less than that of the nanopillar 311, which enhances the phase modulation capability of each nanopillar 311, making full 2π phase coverage easier to achieve, and can indirectly improve the deflection angle.

[0068] Alternatively, the nanopillars 311 may be made of titanium dioxide, silicon nitride, or amorphous silicon.

[0069] In some embodiments of this application, a design method for a display module 100 regarding the metasurface structure layer 30 is provided, comprising the following steps: Determine the target angle of the beam: Determine the geometric parameters of sub-pixel p1 and lens 20t, obtain the set of incident angles {αi} of the viewpoint beam emitted from lens layer 20, and define the set of target exit angles {βi} (satisfying βi>αi).

[0070] Design of metasurface structure layer 30: The phase distribution of metasurface structure layer 30 is simulated by using the incident angle set {αi} and the exit angle set {βi}. Based on the phase distribution, the geometric parameters (lattice period P, width W and height H) of each nanopillar unit 31 are obtained.

[0071] Verification and fabrication: The nanopillar unit 31 is simulated and verified to determine the phase distribution and beam control that can achieve the target. The dimming part 30g is fabricated on the substrate 32 by electron beam lithography or nanoimprint lithography to form the metasurface structure layer 30.

[0072] Please refer to Figure 6 This application provides a schematic diagram of the structure of a display device 1000.

[0073] This application provides a display device 1000, which includes a display module 100 as described in any of the above embodiments.

[0074] It should be noted that the structure of the display module 100 of the display device 1000 in this application embodiment is similar to or the same as the structure of the display module 100 in the above embodiments. For details, please refer to... Figures 1 to 5 Therefore, the relevant explanations will not be repeated here.

[0075] Optionally, the display device 1000 can be a 3D display terminal such as a TV, AR, VR, or mobile phone.

[0076] In the display device 1000 of this application embodiment, a metasurface structure layer 30 is provided on the side of the lens layer 20 away from the display panel 10. The metasurface structure layer 30 includes a plurality of dimming units 30g. One dimming unit 30g is correspondingly disposed on the light-emitting side of a lens 20t. The dimming unit 30g includes a plurality of nanopillar units 31. One nanopillar unit 31 is disposed in the light-emitting path of a sub-pixel p1 through the lens layer 20. The nanopillar unit 31 is configured to deflect the emitted light through the lens layer 20. Based on the center emitted light of the same sub-pixel p1, the deflection angle of the emitted light of the sub-pixel p1 by the lens 20t is a first deflection angle, and the deflection angle of the emitted light of the sub-pixel p1 through the lens layer 20 by the nanopillar unit 31 is a second deflection angle. The second deflection angle c is smaller than the first deflection angle a.

[0077] That is, the display module 100 and display device 1000 of this application embodiment provide a metasurface structure layer 30 on the light-emitting side of the lens layer 20. By using the metasurface structure layer 30 to finely adjust and deflect the emitted light of the sub-pixel p1, the deflection angle of the emitted light of the sub-pixel p1 can be increased, thus expanding the range of viewing angles without sacrificing the overall resolution of the image. Moreover, based on the high precision of the metasurface structure layer 30, the light can be adjusted more finely. Therefore, fine-tuning the emitted light through the lens layer 20 can better reduce the risk of light crosstalk.

[0078] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0079] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0080] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0081] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A display module configured to display a three-dimensional image, characterized in that, The display module includes: The display panel includes multiple pixel units, and each pixel unit includes multiple sub-pixels; A lens layer is disposed on the light-emitting side of the display panel. The lens layer includes a plurality of lenses, one of which covers one of the pixel units. The lenses are configured to deflect the angle of the emitted light from the sub-pixel. A metasurface structure layer is disposed on the side of the lens layer away from the display panel. The metasurface structure layer includes multiple dimming units, one of which is disposed on the light-emitting side of the lens. Each dimming unit includes multiple nanopillar units, one of which is disposed in the light-emitting path of a sub-pixel through the lens layer. The nanopillar unit is configured to deflect the emitted light through the lens layer. Specifically, based on the center emitted light of the same sub-pixel, the deflection angle of the emitted light from the sub-pixel by the lens is a first deflection angle, and the deflection angle of the emitted light from the sub-pixel through the lens layer by the nanopillar unit is a second deflection angle, the second deflection angle being smaller than the first deflection angle.

2. The display module according to claim 1, characterized in that, In the same lens, the first deflection angle of the lens decreases from both sides of the lens toward the center of the lens. In the same dimming section, the second deflection angle of two adjacent nanopillar units decreases in the direction from both sides of the dimming section toward the center of the dimming section.

3. The display module according to claim 1, characterized in that, In the same lens, the first deflection angle of the lens decreases from both sides of the lens toward the center of the lens. In the same dimming section, in the direction from both sides of the dimming section toward the center of the dimming section, two adjacent nanopillar units have the same second deflection angle.

4. The display module according to claim 2 or 3, characterized in that, The sub-pixel and the corresponding nanopillar unit that deflects its emitted light form an optical path assembly; In one of the optical path components, the center line of the sub-pixel and the center line of the nanopillar unit are offset by a distance, and the center line of the nanopillar unit of the same optical path component is closer to the center line of the lens than the center line of the sub-pixel.

5. The display module according to claim 4, characterized in that, In the plurality of optical path components corresponding to the same pixel unit, the offset distance between two adjacent sets of optical path components decreases from the direction of the sides of the lens to the direction of the center of the lens.

6. The display module according to claim 4, characterized in that, In the same pixel unit, the center distance between the two outermost sub-pixels is the first distance, and the center distance between the two outermost nanopillar units in the direction of the deflection light of the same dimming unit is the second distance, which is less than the first distance.

7. The display module according to claim 4, characterized in that, In one pixel unit, the plurality of sub-pixels include a first sub-pixel, a second sub-pixel, and a third sub-pixel. In one dimming unit, the plurality of nanopillar units include a first nanopillar unit, a second nanopillar unit, and a third nanopillar unit. The first nanopillar unit deflects the emitted light of the first sub-pixel, the second nanopillar unit deflects the emitted light of the second sub-pixel, and the third nanopillar unit deflects the emitted light of the third sub-pixel. The first nanopillar unit includes nanopillars arranged in a periodic pattern, the second nanopillar unit includes nanopillars arranged in a periodic pattern, and the third nanopillar unit includes nanopillars arranged in a periodic pattern. The emitted light colors of the first sub-pixel, the second sub-pixel, and the third sub-pixel are all different, and the nanopillar arrangement patterns of the first nanopillar unit, the second nanopillar unit, and the third nanopillar unit are all different.

8. The display module according to claim 7, characterized in that, In the nanopillar unit, the lattice period of the nanopillar is between 200 nanometers and 600 nanometers, the width of the nanopillar is between 50 nanometers and 250 nanometers, and the height of the nanopillar is between 400 nanometers and 1000 nanometers.

9. The display module according to claim 7, characterized in that, The metasurface structure layer further includes a substrate, and the dimming unit is disposed on the side of the substrate away from the lens layer. The refractive index of the substrate is less than that of the nanopillar.

10. A display device, characterized in that, Includes the display module as described in any one of claims 1-9.

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