Antireflective film systems, waveguide assemblies, light field displays, and vehicles

Abstract

This utility model discloses an antireflection coating system, a waveguide component, an optical field display, and a vehicle, relating to the field of display technology. The antireflection coating system includes a first sub-film system, a spacer film, a second sub-film system, and a top film. The first sub-film system includes at least one first sub-film and a second sub-film stacked on top of each other. A spacer film is disposed on the top side of the first sub-film system. The second sub-film system includes at least one third sub-film and a fourth sub-film stacked on top of each other. A top film is disposed on the top side of the second sub-film system. The first and fourth sub-films have equal refractive indices; the second and third sub-films have equal refractive indices; the refractive index of the first sub-film is greater than that of the spacer film; the refractive index of the spacer film is greater than that of the second sub-film; and the refractive index of the second sub-film is greater than that of the top film. The technical solution provided by this utility model can improve the transmittance of the antireflection coating system.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and in particular to an antireflection film system, a waveguide component, a light field display, and a vehicle. Background Technology

[0002] For some displays, it's necessary to have higher transmittance and lower reflectance on the display's emitting surface. This prevents ambient light from reflecting off the emitting surface and coupling with the emitted light, resulting in a clearer display. To achieve this, an anti-reflection coating system is applied to the emitting surface to increase the transmittance of visible light. However, the anti-reflection effect is limited by the bandwidth of the anti-reflection band; generally, the wider the anti-reflection band, the weaker the anti-reflection effect. To cover the visible light spectrum with the anti-reflection band, the reflectance of the emitting surface can only be reduced to around 20%, which is insufficient to meet higher display requirements. Utility Model Content

[0003] The main objective of this invention is to provide an antireflection coating system, a waveguide assembly, an optical field display, and a vehicle, with the aim of improving the transmittance of the antireflection coating system.

[0004] To achieve the above objectives, the present invention proposes an antireflective coating system comprising a first sub-film system, a spacer film, a second sub-film system, and a top film. The first sub-film system comprises a first sub-film and a second sub-film stacked on top of each other; the first sub-film is located on the bottom side of the second sub-film; the first sub-film system has at least one component. The spacer film is disposed on the top side of the first sub-film system. The second sub-film system comprises a third sub-film and a fourth sub-film stacked on top of each other; the third sub-film is located on the bottom side of the fourth sub-film; the second sub-film system has at least one component; the second sub-film system is disposed on the top side of the spacer film. The top film is disposed on the top side of the second sub-film system. Wherein, the refractive indices of the first sub-film and the fourth sub-film are equal; the refractive indices of the second sub-film and the third sub-film are equal; the refractive index of the first sub-film is greater than the refractive index of the spacer film; the refractive index of the spacer film is greater than the refractive index of the second sub-film; and the refractive index of the second sub-film is greater than the refractive index of the top film.

[0005] The first and fourth sub-films have the same refractive index; the second and third sub-films have the same refractive index. This shows that the refractive index distributions in the first and second sub-film systems exhibit a certain mirror symmetry with respect to the spacer film. Therefore, the first, second, and third sub-film systems can form a photonic crystal configuration to increase the transmittance of light within a specific frequency band (anti-reflection effect). For display devices, this specific frequency band is the visible light band.

[0006] The stronger the periodicity of a photonic crystal, the stronger its modulation effect on light within a narrower frequency band. The most typical example is when a photonic crystal forms a Bragg grating, only light that satisfies the grating equation will be strongly reflected. However, because the visible light frequency band is relatively wide, antireflection coating systems cannot form excessively strong periodicity.

[0007] To address this, a spacer with a refractive index between that of the first and second sub-films, and a top film with a refractive index lower than that of the second sub-film, are incorporated to disrupt the periodicity of the first and second sub-film systems. This broadens the frequency band in which the antireflection coating system can achieve its antireflection effect, thus allowing for a sufficient reduction in the reflectivity of light at different frequencies within the visible light band. The design of the antireflection coating system is not constrained by light at the edge of the antireflection frequency band, thereby further improving the transmittance of the antireflection coating system.

[0008] In some embodiments, the thicknesses of both the first sub-film and the fourth sub-film are greater than or equal to 10 nm and less than or equal to 150 nm; and / or

[0009] The thickness of the spacer membrane is greater than or equal to 10 nm and less than or equal to 150 nm; and / or

[0010] The thickness of both the second sub-film and the third sub-film is greater than or equal to 3 nm and less than or equal to 100 nm; and / or

[0011] The thickness of the top film is greater than or equal to 3 nm and less than or equal to 100 nm.

[0012] In some embodiments, the antireflective film system further includes an antifouling film disposed on the top side of the top film; the refractive index of the antifouling film is less than the refractive index of the second sub-film.

[0013] In some embodiments, the number of both the first submembrane system and the second submembrane system is less than or equal to 5; and / or

[0014] The number of the first sub-membrane system is greater than or equal to the number of the second sub-membrane system.

[0015] In some embodiments, the antireflective coating system further includes a base layer disposed on the bottom side of the first sub-film system, the base layer being used for bonding with the reflective surface.

[0016] This invention also proposes a waveguide assembly, including an optical waveguide, a first cover plate, and an antireflection coating system. The optical waveguide is used for propagating and emitting display light. The first cover plate is disposed on the light-emitting side of the optical waveguide. The antireflective coating system includes a first sub-film system, a spacer film, a second sub-film system, and a top film. The first sub-film system includes a first sub-film and a second sub-film stacked on top of each other. The first sub-film is located on the bottom side of the second sub-film. There is at least one first sub-film system. The spacer film is disposed on the top side of the first sub-film system. The second sub-film system includes a third sub-film and a fourth sub-film stacked on top of each other. The third sub-film is located on the bottom side of the fourth sub-film. There is at least one second sub-film system. The second sub-film system is disposed on the top side of the spacer film. The top film is disposed on the top side of the second sub-film system. The refractive indices of the first sub-film and the fourth sub-film are equal. The refractive indices of the second sub-film and the third sub-film are equal. The refractive index of the first sub-film is greater than or equal to the refractive index of the spacer film. The refractive index of the spacer film is greater than the refractive index of the second sub-film. The refractive index of the second sub-film is greater than or equal to the refractive index of the top film. The antireflective coating system is disposed on the light-guiding side of the optical waveguide and on both sides of the first cover plate.

[0017] In some embodiments, the thicknesses of both the first sub-film and the fourth sub-film are greater than or equal to 10 nm and less than or equal to 150 nm; and / or

[0018] The thickness of the spacer membrane is greater than or equal to 10 nm and less than or equal to 150 nm; and / or

[0019] The thickness of both the second sub-film and the third sub-film is greater than or equal to 3 nm and less than or equal to 100 nm; and / or

[0020] The thickness of the top film is greater than or equal to 3 nm and less than or equal to 100 nm.

[0021] In some embodiments, the waveguide assembly further includes an antifouling film disposed on the light-guiding side of the optical waveguide and located on the top side of the antireflection film system; the antifouling film is also disposed on the side of the first cover plate facing away from the optical waveguide and located on the top side of the antireflection film system.

[0022] In some embodiments, the refractive index of the antifouling film is less than the refractive index of the second sub-film; and / or

[0023] The antifouling film on the first cover plate has the same refractive index and thickness as the antifouling film on the optical waveguide.

[0024] In some embodiments, the number of both the first submembrane system and the second submembrane system is less than or equal to 5; and / or

[0025] The number of the first sub-membrane system is greater than or equal to the number of the second sub-membrane system.

[0026] In some embodiments, the antireflective coating system further includes a substrate layer disposed on the bottom side of the first sub-film system; an optical adhesive layer is disposed between the substrate layer and the first cover plate and the optical waveguide; and / or

[0027] The waveguide assembly further includes a second cover plate, which is disposed on the light-guiding side of the optical waveguide. The antireflective coating disposed on the light-guiding side of the optical waveguide is disposed on the side of the second cover plate facing away from the optical waveguide. An optical adhesive layer is disposed between the substrate layer and the second cover plate.

[0028] In some embodiments, a metal film is further disposed on the light-guiding surface of the optical waveguide, and the antireflection film disposed on the light-guiding surface of the optical waveguide is disposed on the top side of the metal film.

[0029] In some embodiments, the thickness of the metal film is greater than or equal to 2 nm and less than or equal to 30 nm.

[0030] In some embodiments, a buffer layer is further provided between the metal film and the antireflection membrane system, the buffer layer being used to bond the metal film and the antireflection membrane system.

[0031] In some embodiments, the thickness of the buffer layer is greater than or equal to 5 nm and less than or equal to 30 nm.

[0032] In some embodiments, the thickness and refractive index of the antireflective coating system disposed on both sides of the first cover plate are distributed in a mirror-symmetric manner with respect to the first cover plate.

[0033] In some embodiments, the waveguide assembly further includes a second cover plate disposed on the light-guiding side of the optical waveguide; the second cover plate is spaced apart from the optical waveguide; and the antireflection film disposed on the light-guiding side of the optical waveguide is disposed on the side of the second cover plate facing away from the optical waveguide.

[0034] In some embodiments, a metal film is disposed on the side of the second cover plate facing away from the optical waveguide; or

[0035] A metal film is disposed on the side of the second cover plate facing away from the optical waveguide, and a buffer layer is disposed on the side of the metal film facing away from the second cover plate.

[0036] In some embodiments, a first low-refractive-index water-based adhesive layer is disposed on the light-emitting side of the optical waveguide, the first low-refractive-index water-based adhesive layer being used to adhere to the first cover plate; and / or

[0037] The waveguide assembly further includes a second cover plate, which is disposed on the light-guiding side of the optical waveguide; a second low-refractive-index water-based adhesive layer is disposed on the light-guiding surface of the optical waveguide; the second low-refractive-index water-based adhesive layer is used to bond with the second cover plate.

[0038] In some embodiments, the first cover plate comprises dark glass; and / or

[0039] The waveguide assembly further includes a second cover plate disposed on the light-guiding side of the optical waveguide; the second cover plate comprises dark glass.

[0040] This utility model also proposes a light field display, including an optomechanical component and the aforementioned waveguide component; the optomechanical component is used to input light carrying image information to the waveguide component; or

[0041] This includes the aforementioned antireflective membrane systems.

[0042] This utility model also proposes a vehicle, including the above-described antireflective coating system, the above-described waveguide assembly, or the above-described light field display. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0044] Figure 1 A schematic diagram of the structure of the first embodiment of the antireflection membrane system provided by this utility model;

[0045] Figure 2 A schematic diagram of the structure of the first embodiment of the waveguide component provided by this utility model;

[0046] Figure 3 A schematic diagram of the structure of the second embodiment of the waveguide component provided by this utility model;

[0047] Figure 4 A schematic diagram of the structure of the third embodiment of the waveguide component provided by this utility model;

[0048] Figure 5 A schematic diagram of the structure of the fourth embodiment of the waveguide component provided by this utility model;

[0049] Figure 6 A schematic diagram of the fifth embodiment of the waveguide component provided by this utility model;

[0050] Figure 7A schematic diagram of the sixth embodiment of the waveguide component provided by this utility model;

[0051] Figure 8 A schematic diagram of the structure of the seventh embodiment of the waveguide component provided by this utility model;

[0052] Figure 9 A schematic diagram of the structure of the eighth embodiment of the waveguide component provided by this utility model;

[0053] Figure 10 A schematic diagram of a structure of an embodiment of the light field display provided by this utility model;

[0054] Figure 11 A schematic diagram of the structure of an embodiment of the vehicle provided by this utility model;

[0055] Figure 12 This is a diagram showing the transmittance and reflectance distribution of waveguide components without antireflection coatings in related technologies.

[0056] Figure 13 In related technologies, a transmittance and reflectance distribution diagram of a waveguide component with a conventional antireflection coating system is provided.

[0057] Figure 14 A reflectance distribution diagram of the first cover plate in the visible light band of the ninth embodiment of the waveguide assembly provided by this utility model.

[0058] Figure 15 A full-band reflectivity distribution diagram of the first cover plate of the ninth embodiment of the waveguide assembly provided by this utility model;

[0059] Figure 16 A diagram showing the overall reflectivity distribution of the ninth embodiment of the waveguide assembly provided by this utility model;

[0060] Figure 17 A diagram showing the overall transmittance distribution of the ninth embodiment of the waveguide assembly provided by this utility model;

[0061] Figure 18 Hue distribution table of the ninth embodiment of the waveguide component provided by this utility model;

[0062] Figure 19 Average reflectance distribution of 500 samples of the ninth embodiment of the waveguide component provided by this utility model;

[0063] Figure 20 Average transmittance distribution of 500 samples of the ninth embodiment of the waveguide component provided by this utility model.

[0064] Figure 21A scatter plot of reflectance distribution of 500 samples of the waveguide component provided in the ninth embodiment of the present invention, taking into account the human eye's visual perception function.

[0065] Figure 22 A scatter plot of transmittance distribution of 500 samples of the ninth embodiment of the waveguide component provided by this utility model, taking into account the human eye's visual perception function.

[0066] Figure 23 Scatter plot of frontal reflection hue distribution of 500 samples of the ninth embodiment of the waveguide component provided by this utility model.

[0067] Figure 24 Scatter plot of the hue distribution of the reverse reflection of 500 samples of the ninth embodiment of the waveguide component provided by this utility model.

[0068] Figure 25 Scatter plot of transmission hue distribution of 500 samples of the ninth embodiment of the waveguide component provided by this utility model.

[0069] Figure 26 Scatter plot of the average hue distribution of 500 samples of the ninth embodiment of the waveguide component provided by this utility model.

[0070] Explanation of icon numbers:

[0071] 10,000 vehicles;

[0072] Dashboard 11000; Seats 12000;

[0073] Light field display 1000;

[0074] Optomechanical component 1100;

[0075] Waveguide component 100;

[0076] Optical waveguide 110;

[0077] First cover plate 120;

[0078] Metal film 130;

[0079] Buffer layer 140;

[0080] Second cover plate 150;

[0081] First low-refractive-index hydrogel layer 161;

[0082] Second low-refractive-index hydrogel layer 162;

[0083] Antireflective membrane system 10;

[0084] First submembrane system 11; First submembrane 111; Second submembrane 112;

[0085] 12 septum membranes;

[0086] Second submembrane system 13; Third submembrane 131; Fourth submembrane 132;

[0087] Top membrane 14;

[0088] Anti-fouling membrane 15;

[0089] Basal layer 16;

[0090] Optical adhesive layer 17.

[0091] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings. Detailed Implementation

[0092] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0093] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0094] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0095] This invention proposes an antireflection membrane system.

[0096] Please refer to Figure 1 and Figure 2 The antireflective membrane system 10 proposed in this utility model includes a first sub-membrane system 11, a spacer membrane 12, a second sub-membrane system 13, and a top membrane 14. The first sub-membrane system 11 includes a first sub-membrane 111 and a second sub-membrane 112 stacked on top of each other; the first sub-membrane 11 is located on the bottom side of the second sub-membrane 112; there is at least one first sub-membrane system 11. The spacer membrane 12 is disposed on the top side of the first sub-membrane system 11. The second sub-membrane system 13 includes a third sub-membrane 131 and a fourth sub-membrane 132 stacked on top of each other; the third sub-membrane 131 is located on the bottom side of the fourth sub-membrane 132; there is at least one second sub-membrane system 13; the second sub-membrane system 13 is disposed on the top side of the spacer membrane 12. The top membrane 14 is disposed on the top side of the second sub-membrane system 13. Among them, the refractive indices of the first sub-film 111 and the fourth sub-film 132 are equal; the refractive indices of the second sub-film 112 and the third sub-film 131 are equal; the refractive index of the first sub-film 111 is greater than the refractive index of the spacer film 12; the refractive index of the spacer film 12 is greater than the refractive index of the second sub-film 112; and the refractive index of the second sub-film 112 is greater than the refractive index of the top film 14.

[0097] The antireflective coating system 10 is a film system formed by stacking multiple layers of films. It is used to attach to the surface of components such as optical waveguide 110 or cover plates to increase the surface transmittance. In some embodiments, please refer to... Figure 2 The antireflective coating system 10 can be directly formed on the surface of the component (i.e., by chemical or physical deposition processes; for special film layers, spraying processes can also be used) Figure 2 In this embodiment, the antireflective coating system 10 is directly formed on the first cover plate 120 or the optical waveguide 110. However, in other embodiments, please refer to... Figure 3 The antireflective coating system 10 may also include a substrate layer 16, which is typically made of PET (Polyethylene Terephthalate). This allows the antireflective coating system 10 to form an independent strip, which can be adhered to the surface of the component (i.e., when needed) Figure 3 In the middle, it is attached to the first cover plate 120 or the optical waveguide 110 by the optical adhesive layer 17.

[0098] There can be at least one first submembrane system 11, and when there are multiple first submembrane systems 11, they can be stacked on top of each other; there can also be at least one second submembrane system 13, and when there are multiple second submembrane systems 13, they can be stacked on top of each other. For an example, please refer to [reference needed]. Figure 1 , Figure 1 The embodiment shown has two mutually stacked first sub-membrane systems 11 and two mutually stacked second sub-membrane systems 13.

[0099] In the accompanying drawings of this application, the designations H1, H2, L1, L2, L0, etc., are used to represent refractive indices, or can be considered as symbols used in the film layer formula to represent different layers. For example, the antireflection film system 10 proposed in this utility model can be represented as Sub|(H1L1)^n H2(L1H1)^m L2|, where Sub marks the side of the film layer closest to the attached element, n represents the number of the first sub-film system 11, and m represents the number of the second sub-film system 13. Obviously, in the above formula, in the powers of n, H1 is the first sub-film 111, and L1 is the second sub-film 112; in the powers of m, L1 is the third sub-film 131, and H1 is the fourth sub-film 132; H2 is the spacer film 12, and L2 is the top film 14.

[0100] The first sub-film 111, the fourth sub-film 132, and the spacer film 12 can be metal oxide thin films, such as films made of metal oxides like Nb2O5, Al2O3, TiO2, HfO2, and Ta2O5. The second sub-film 112, the third sub-film 131, and the top film 14 can be films made of silicon oxide (SiO2), silicon nitride (SiNx), or silicon nitride (SiOxNy).

[0101] In this application, "top side" and "bottom side" refer to their relative positions to the film system and the element to which it is attached. The antireflective film system 10 has two pre-defined opposing sides, one side facing the element when the antireflective film system 10 is attached to the element surface, and the other side facing away from the element when the antireflective film system 10 is attached to the element surface; the side facing the element is the bottom side, and the side facing away from the element is the top side. For an example, please refer to... Figure 2 For the antireflective coating system 10 above the first cover plate 120, Figure 2 The top side is above the bottom side; while... Figure 2 In the middle, for the antireflective membrane system 10 below the first cover plate 120, Figure 2 The top is the bottom side, and the bottom is the top side.

[0102] The first sub-film 111 and the fourth sub-film 132 have the same refractive index; the second sub-film 112 and the third sub-film 131 have the same refractive index. It can be seen that the refractive index distributions in the first sub-film system 11 and the second sub-film system 13 have a certain mirror symmetry with respect to the spacer film 12. Therefore, the first sub-film system 11, the spacer film 12, and the second sub-film 112 can form a photonic crystal configuration to increase the transmittance of light within a specific frequency band (anti-reflection effect). For display devices, this specific frequency band is the visible light band.

[0103] The stronger the periodicity of a photonic crystal, the stronger its modulation effect on light within a narrower frequency band. The most typical example is when a photonic crystal forms a Bragg grating, only light that satisfies the grating equation will be strongly reflected. However, because the visible light frequency band is relatively wide, the antireflection coating system 10 cannot form excessively strong periodicity.

[0104] To this end, a spacer 12 with a refractive index between that of the first sub-film 111 and the second sub-film 112, and a top film 14 with a refractive index lower than that of the second sub-film 112 are provided to disrupt the periodicity of the first sub-film system 11 and the second sub-film system 13. This makes the antireflection coating system 10 have a wider frequency band where it can achieve the antireflection effect, thus allowing the reflectivity of light of different frequencies in the visible light band to be reduced to a sufficient extent. The design of the antireflection coating system 10 is not constrained by light at the edge of the antireflection frequency band, thereby further improving the transmittance of the antireflection coating system 10.

[0105] Please refer to Figure 1 In some embodiments, the thicknesses of the first sub-film 111 and the fourth sub-film 132 are both greater than or equal to 10 nm and less than or equal to 150 nm.

[0106] If the thickness of the first sub-film 111 and the fourth sub-film 132 is too small, the manufacturing difficulty will be greater. If the thickness is too large, the light loss may increase and the design difficulty will be increased. Therefore, when the thickness of the first sub-film 111 and the fourth sub-film 132 is greater than or equal to 10 nm and less than or equal to 150 nm, the manufacturing and design difficulty can be reduced.

[0107] In one example, the thicknesses of the first sub-film 111 and the fourth sub-film 132 can be any of 10nm, 20nm, 30nm, 40nm, 50nm, 60nm, 70nm, 80nm, 90nm, 100nm, 110nm, 120nm, 130nm, 140nm, and 150nm, respectively. Furthermore, when there are multiple first sub-films 111, their thicknesses can be different; similarly, when there are multiple fourth sub-films 132, their thicknesses can be different.

[0108] Please refer to Figure 1 In some embodiments, the thickness of the spacer 12 is greater than or equal to 10 nm and less than or equal to 150 nm.

[0109] If the thickness of the spacer membrane 12 is too small, it will be difficult to manufacture. If the thickness is too large, it may cause the distance between the first sub-membrane system 11 and the second sub-membrane system 13 to be too far, increasing the design difficulty. Therefore, when the thickness of the spacer membrane 12 is greater than or equal to 10 nm and less than or equal to 150 nm, the manufacturing and design difficulty of the antireflection membrane system 10 can be reduced.

[0110] In one example, the thickness of the spacer 12 can be any of 10 nm, 20 nm, 30 nm, 40 nm, 50 nm, 60 nm, 70 nm, 80 nm, 90 nm, 100 nm, 110 nm, 120 nm, 130 nm, 140 nm and 150 nm.

[0111] Please refer to Figure 1 In some embodiments, the thicknesses of the second sub-film 112 and the third sub-film 131 are both greater than or equal to 3 nm and less than or equal to 100 nm.

[0112] If the thickness of the second sub-film 112 and the third sub-film 131 is too small, the manufacturing difficulty will be greater. If the thickness is too large, the light loss may increase and the design difficulty will be increased. Therefore, when the thickness of the second sub-film 112 and the third sub-film 131 is greater than or equal to 3nm and less than or equal to 100nm, the manufacturing and design difficulty can be reduced.

[0113] In one example, the thicknesses of the second sub-film 112 and the third sub-film 131 can be any of the following: 3 nm, 9 nm, 13 nm, 19 nm, 23 nm, 29 nm, 33 nm, 39 nm, 43 nm, 49 nm, 53 nm, 59 nm, 63 nm, 69 nm, 73 nm, 79 nm, 83 nm, 89 nm, 93 nm, 99 nm, and 100 nm. Furthermore, when there are multiple second sub-films 112, their thicknesses can be different; similarly, when there are multiple third sub-films 131, their thicknesses can be different.

[0114] Please refer to Figure 1 In some embodiments, the thickness of the top film 14 is greater than or equal to 3 nm and less than or equal to 100 nm.

[0115] If the thickness of the top film 14 is too small, it will be difficult to manufacture. If the thickness is too large, it may be close to the wavelength of visible light, which may increase the reflectivity of some wavelengths of visible light. When the thickness of the top film 14 is greater than or equal to 3 nm and less than or equal to 100 nm, it can be manufactured with lower difficulty and will not cause anti-reflection effects on certain wavelengths of visible light.

[0116] In one example, the thickness of the top film 14 can be any of 3 nm, 9 nm, 13 nm, 19 nm, 23 nm, 29 nm, 33 nm, 39 nm, 43 nm, 49 nm, 53 nm, 59 nm, 63 nm, 69 nm, 73 nm, 79 nm, 83 nm, 89 nm, 93 nm, 99 nm, and 100 nm.

[0117] Please refer to Figure 2In some embodiments, the antireflective coating system 10 further includes an antifouling membrane 15 disposed on the top side of the top membrane 14; the refractive index of the antifouling membrane 15 is less than the refractive index of the second sub-membrane 112.

[0118] The anti-fouling film 15 prevents contaminants such as oil, dust, or fingerprints from adhering to the antireflective film system 10, thus avoiding these contaminants from affecting the display effect. The anti-fouling film 15 can be made of anti-fingerprint materials such as MgF2 or fluorine-containing compounds.

[0119] The antifouling film 15 can be exempted from light modulation (i.e., it can achieve an anti-reflective effect), so its refractive index can be greater than or equal to 1.3 and less than or equal to 1.4 to avoid interfering with the achievement of the anti-reflective effect.

[0120] The thickness of the antifouling membrane 15 can be greater than or equal to 2nm and less than or equal to 30nm to avoid peeling off and wasting the material of the antifouling membrane 15.

[0121] Please refer to Figure 1 and Figure 2 In some embodiments, the number of the first submembrane system 11 and the second submembrane system 13 is less than or equal to 5.

[0122] When the number of the first sub-membrane system 11 and the second sub-membrane system 13 is too large, the improvement in anti-reflection effect is not obvious, but the design difficulty increases significantly. Therefore, when the number of the first sub-membrane system 11 and the second sub-membrane system 13 is less than or equal to 5, the anti-reflection membrane system 10 can have a lower design difficulty while having a better anti-reflection effect.

[0123] In one example, the number of the first submembrane system 11 and the second submembrane system 13 can be any of 1, 2, 3, 4, or 5.

[0124] Please refer to Figure 1 and Figure 2 In some embodiments, the number of first sub-membrane systems 11 is greater than or equal to the number of second sub-membrane systems 13.

[0125] The first sub-membrane system 11 is located on the bottom side of the second sub-membrane system 13, and is therefore closer to the elements attached to the antireflection membrane system 10. Thus, it can play the main antireflection role. The number of the first sub-membrane system 11 is greater than or equal to the number of the second sub-membrane system 13, so that the first sub-membrane system 11 can play most of the antireflection role, reducing the design difficulty of the antireflection membrane system 10.

[0126] Please refer to Figure 3 and Figure 4 In some embodiments, the antireflective coating system 10 further includes a base layer 16 disposed on the bottom side of the first sub-film system 11, and the base layer 16 is used to adhere to the reflective surface.

[0127] The reflective surface is the surface of the element to which the antireflective coating system 10 is attached. Because the surface of the element always has a difference in refractive index with the environment, reflection will occur. The antireflective coating system 10 can achieve the antireflective effect by being attached to the reflective surface.

[0128] The substrate layer 16 allows the antireflective coating system 10 to exist independently of the device and to be stored independently. This broadens the application scenarios for the antireflective coating system 10. It also facilitates replacement when the antireflective coating system 10 on the device surface ages.

[0129] In addition, the substrate can also serve to bond the cover plate or the optical waveguide 110, preventing fragments from injuring the user if either breaks. The thickness of both the PET and the optical adhesive layer 17 can be greater than or equal to 50 micrometers and less than or equal to 250 micrometers.

[0130] When the waveguide component 100 is used as an output device for a display, it sometimes needs to be set to be transparent. For example, in AR (Augmented Reality) displays, the user needs to be able to observe the real-world scene on the side of the waveguide component 100 that is facing away from the observer. However, the surface of the waveguide component 100 in related technologies has a high reflectivity, causing a significant portion of the scene on the side of the waveguide component 100 facing away from the observer to be reflected through the front of the waveguide component 100. This makes the scene appear noticeably darker to the user, which is detrimental to the user's observation of the real-world scene.

[0131] Please refer to Figure 2 This utility model also proposes a waveguide assembly 100, including an optical waveguide 110, a first cover plate 120, and an antireflection coating system 10. The optical waveguide 110 is used to propagate and emit display light. The first cover plate 120 is disposed on the light-emitting side of the optical waveguide 110. The antireflection coating system 10 includes a first sub-film system 11, a spacer film 12, a second sub-film system 13, and a top film 14; the first sub-film system 11 includes a first sub-film 111 and a second sub-film 112 stacked on top of each other; the first sub-film 111 is on the bottom side of the second sub-film 112; the first sub-film system 11 has at least one; the spacer film 12 is disposed on the top side of the first sub-film system 11; the second sub-film system 13 includes a third sub-film 131 and a fourth sub-film 132 stacked on top of each other; the third sub-film 131 is on the bottom side of the fourth sub-film 132; the first sub-film 1 ...31 has at least one; the second sub-film 131 has at least one; the second sub-film 131 has at least one; the third sub-film 131 has at least one; the second sub-film 131 has at least one; the second sub-film 131 has at least one; the third sub-film 131 has at least one; the second sub-film 131 has at least one There is at least one sub-film system 13; the second sub-film system 13 is disposed on the top side of the spacer film 12; the top film 14 is disposed on the top side of the second sub-film system 13; the refractive indices of the first sub-film 111 and the fourth sub-film 132 are equal; the refractive indices of the second sub-film 112 and the third sub-film 131 are equal; the refractive index of the first sub-film 111 is greater than or equal to the refractive index of the spacer film 12; the refractive index of the spacer film 12 is greater than the refractive index of the second sub-film 112; the refractive index of the second sub-film 112 is greater than or equal to the refractive index of the top film 14. The antireflection coating system 10 is disposed on the light-guiding side of the optical waveguide 110 and on both sides of the first cover plate 120.

[0132] The display's optical engine can input light signals carrying image information (i.e., display light) into the waveguide assembly 100. After the light signals propagate through the optical waveguide 110 of the waveguide assembly 100, they are emitted and received by the human eye, allowing the user to see the image. This image can be similar to that of a traditional display screen, or it can be an image used for interaction with the user in an AR display.

[0133] The first cover plate 120 can be made of materials such as resin or glass. The first cover plate 120 can be fixedly combined with the optical waveguide 110 by means of frame adhesive, full bonding adhesive, spot adhesive or mechanical locking. Figure 2 or Figure 3 In the embodiment shown, the first cover plate 120 and the optical waveguide 110 are fixed together by frame adhesive, and the OCA (Optical Clear Adhesive) in the figure is the adhesive used in the frame adhesive process.

[0134] The first cover plate 120 is disposed on the emission surface (i.e. the light emission side) of the optical waveguide 110 to protect the emission surface of the optical waveguide 110 from external interference. At the same time, the first cover plate 120 and the surface of the optical waveguide 110 can form an air layer (i.e., the air layer represented by Air in the figure), so that the optical waveguide 110 can emit display light more stably.

[0135] The light-guiding side of the optical waveguide 110, i.e., the side of the optical waveguide 110 facing away from its own light-emitting side, generally experiences total internal reflection (or reflection with extremely high reflectivity) on the side surface of the light-guiding side of the optical waveguide 110, thus allowing it to propagate in the optical waveguide 110 with extremely low loss. The material of the optical waveguide 110 can be transparent materials such as glass, resin, or SiC; therefore, the refractive index of the optical waveguide 110 can be greater than or equal to 1.45 and less than or equal to 2.7, preferably greater than or equal to 1.7 and less than or equal to 2.0. The thickness of the optical waveguide 110 can be greater than or equal to 0.5 mm and less than or equal to 5 mm, preferably greater than or equal to 1 mm and less than or equal to 3 mm.

[0136] As can be seen, the antireflective coating system 10 is disposed on the light guiding side of the optical waveguide 110 and on both sides of the first cover plate 120, so that the antireflective coating basically covers all interfaces that may have strong reflections (except for the light emitting side of the optical waveguide 110, but this side needs to emit display light, so the antireflective coating cannot be disposed to interfere with the light emission), thereby increasing the overall transmittance of the waveguide assembly 100 and improving the display effect of the waveguide assembly 100.

[0137] In one example of waveguide assembly 100 (i.e., the ninth embodiment of waveguide assembly 100), the first cover plate 120 may be glass, and the film layers covering both sides of the first cover plate 120 are distributed in a mirror-symmetrical manner about the first cover plate 120; taking one side of the first cover plate 120 as an example, in the direction outward from the first cover plate 120, the thickness of each film layer is 15.6nm, 37.25nm, 34.99nm, 35.25nm, 35.31nm, 30.31nm, 123.14nm, 85.12nm, and 4.46nm, wherein the film layer with a thickness of 4.46nm is the anti-fouling film 15, the film layer with a thickness of 85.12nm is the top film 14, and the film layer with a thickness of 35.31nm is... Spacer 12, and the other film layers are arranged in the manner specified above. In addition, the optical waveguide 110 is also made of glass and has a thickness of 2 mm. From the light-guiding surface of the optical waveguide 110 outward, film layers with thicknesses of 2.78 nm, 15.75 nm, 12.27 nm, 94.05 nm, 10.75 nm, 21.6 nm, 17.59 nm, 3.63 nm, 68.34 nm, 82.37 nm, and 4.46 nm are arranged sequentially. Among them, the film layer with a thickness of 4.46 nm is the anti-fouling film 15, the film layer with a thickness of 82.37 nm is the top film 14, the film layer with a thickness of 17.59 nm is the spacer 12, and the other film layers are arranged in the manner specified above.

[0138] Please refer to Figure 12 For waveguide assembly 100 without antireflection coating, both the front (light-emitting side of optical waveguide 110) and the back (light-guiding side of optical waveguide 110) strongly reflect visible light, with a reflectivity of 25% or even higher.

[0139] Please refer to Figure 13 The waveguide component 100, which is equipped with an antireflection coating according to relevant technologies, has a relatively strong reflectivity on both the front and back sides, which is basically above 20%.

[0140] Please refer to Figure 14 For example, in the ninth embodiment of waveguide component 100, the reflectivity of the first cover plate 120 to visible light can be reduced to below 2%, thereby significantly increasing the transmittance.

[0141] Please refer to Figure 15 For example, the first cover plate 120 provided in the ninth embodiment of the waveguide component 100 has low reflectivity to visible light but high reflectivity to infrared and ultraviolet bands, which can effectively avoid infrared thermal effects and damage to the waveguide component 100 by ultraviolet rays, thereby improving the reliability of the waveguide component 100.

[0142] Please refer to Figure 16 and Figure 17In the ninth embodiment of waveguide component 100, the reflectivity of the waveguide component 100 as a whole can be reduced to below 15% on both its front and back sides, while its transmittance can be increased to above 85%. Simultaneously, it exhibits high reflectivity in both the infrared and ultraviolet bands, resulting in high reliability for the waveguide component 100. Considering the specific visual function, the reflectivity of visible light can be reduced to below 12%, significantly lowering the reflectivity.

[0143] Please refer to Figure 18 As can be seen, the hues of the waveguide component 100 in the ninth embodiment are all relatively small, so they do not display colors externally, which can also improve the display effect of the waveguide component 100.

[0144] In addition, the consistency of the optical waveguide 110 component 100 during the manufacturing process is also an important indicator for evaluating the performance of the antireflection film system 10. Taking into account manufacturing tolerances, 500 samples of the ninth embodiment of the waveguide component 100 were formed and their consistency was measured.

[0145] Please refer to Figures 19 to 24 As can be seen, the reflectivity of the ninth embodiment of the waveguide component 100 is basically stable at around 12%, and the transmittance is basically stable at around 87.4%, showing high consistency and facilitating manufacturing.

[0146] Please refer to Figure 25 and Figure 26 As can be seen, the hue of the ninth embodiment of the waveguide component 100 is basically colorless and transparent, and the hue consistency is also high, which is convenient for manufacturing.

[0147] Please refer to Figure 1 and Figure 2 In some embodiments, the thicknesses of the first sub-film 111 and the fourth sub-film 132 are both greater than or equal to 10 nm and less than or equal to 150 nm.

[0148] The beneficial effects of the above-described waveguide component 100 implementation and the specific thicknesses that can be set for the first sub-film 111 and the fourth sub-film 132 are as described above and will not be repeated here.

[0149] In some embodiments, the thickness of the spacer 12 is greater than or equal to 10 nm and less than or equal to 150 nm.

[0150] The beneficial effects of the above-described waveguide component 100 implementation and the specific thickness of the spacer 12 can be set are as described above and will not be repeated here.

[0151] In some embodiments, the thicknesses of the second sub-film 112 and the third sub-film 131 are both greater than or equal to 3 nm and less than or equal to 100 nm.

[0152] The beneficial effects of the above-described waveguide component 100 implementation and the specific thicknesses that can be set for the second sub-film 112 and the third sub-film 131 are as described above and will not be repeated here.

[0153] In some embodiments, the thickness of the top film 14 is greater than or equal to 3 nm and less than or equal to 100 nm.

[0154] The beneficial effects of the above-described waveguide component 100 implementation and the specific thickness that the top film 14 can be set to are as described above and will not be repeated here.

[0155] Please refer to Figure 4 and Figure 5 In some embodiments, the waveguide assembly 100 further includes an anti-fouling film 15, which is disposed on the light-guiding side of the optical waveguide 110 and located on the top side of the anti-reflection film system 10; the anti-fouling film 15 is also disposed on the side of the first cover plate 120 facing away from the optical waveguide 110 and located on the top side of the anti-reflection film system 10.

[0156] The light-guiding side of the optical waveguide 110 and the side of the first cover plate 120 facing away from the optical waveguide 110 can both be surfaces that are directly exposed to the environment. Therefore, setting an anti-fouling film 15 on these surfaces can help keep the waveguide assembly 100 clean and improve the display effect.

[0157] Please refer to Figure 4 and Figure 5 In some embodiments, the refractive index of the antifouling film 15 is less than that of the second sub-film 112. This ensures that the refractive index of the antifouling film 15 is less than that of all layers in the first sub-film system 11 and the second sub-film system 13, as well as the top film 14 and the spacer film 12, thus avoiding any impact on the antireflection effect.

[0158] Please refer to Figure 6 and Figure 7 In some embodiments, the antifouling film 15 on the first cover plate 120 and the antifouling film 15 on the optical waveguide 110 have the same refractive index and thickness. With this arrangement, the antifouling film 15 on the first cover plate 120 and the antifouling film 15 on the optical waveguide 110 can share the same manufacturing process, simplifying the production process of the waveguide assembly 100.

[0159] Please refer to Figure 1 In some embodiments, the number of the first submembrane system 11 and the second submembrane system 13 is less than or equal to 5.

[0160] The beneficial effects of the above-described waveguide component 100 implementation, as well as the specific desirable quantities of the first sub-film system 11 and the second sub-film system 13, are as described above and will not be repeated here.

[0161] In some embodiments, the number of first sub-membrane systems 11 is greater than or equal to the number of second sub-membrane systems 13.

[0162] The beneficial effects of the above-described implementation of the waveguide component 100 are as described above and will not be repeated here.

[0163] Please refer to Figure 8 and Figure 9 In some embodiments, the antireflective coating system 10 further includes a substrate layer 16, which is disposed on the bottom side of the first sub-film system 11. An optical adhesive layer 17 is disposed between the substrate layer 16, the first cover plate 120, and the optical waveguide 110. In this way, the antireflective coating system 10 can be directly attached to the surface of the first cover plate 120, which is convenient for manufacturing and also facilitates the replacement of the antireflective coating system 10, avoiding the need to discard the entire first cover plate 120 if the antireflective coating system 10 is damaged.

[0164] Please refer to Figure 4 and Figure 6 In some embodiments, the waveguide assembly 100 further includes a second cover plate 150, which is disposed on the light-guiding side of the optical waveguide 110. An anti-reflection film system 10 disposed on the light-guiding side of the optical waveguide 110 is disposed on the side of the second cover plate 150 facing away from the optical waveguide 110. An optical adhesive layer 17 is disposed between the substrate layer 16 and the second cover plate 150.

[0165] This facilitates the production of the second cover plate 150 and avoids the need for the entire second cover plate 150 to be damaged if the anti-reflective membrane system 10 on the second cover plate 150 is damaged.

[0166] Please refer to Figure 2 In some embodiments, a metal film 130 is also disposed on the light guiding surface of the optical waveguide 110, and an anti-reflection film system 10 disposed on the light guiding surface of the optical waveguide 110 is disposed on the top side of the metal film 130.

[0167] The metal film 130 can assist the light guide surface of the optical waveguide 110 in reflecting light, thereby reducing the light loss in the optical waveguide 110.

[0168] In the accompanying drawings of this application, Metal Nano Layer represents the metal film 130, Waveguide Glass represents the optical waveguide 110 (but in some embodiments, it may not be made of glass), Cover Glass represents the cover glass, and Dark-Color Cover Glass represents the dark-colored cover glass. However, in some embodiments, both the first cover 120 and the second cover 150 may not be made of glass. The refractive index of the cover may be greater than or equal to 1.45 and less than or equal to 1.60.

[0169] Please refer to Figure 2 In some embodiments, the thickness of the metal film 130 is greater than or equal to 2 nm and less than or equal to 30 nm.

[0170] If the thickness of the metal film 130 is too small, the manufacturing difficulty increases, and it is not easy to form a metal film 130 with uniform thickness. If the thickness of the metal film 130 is too large, the light loss of the metal film 130 increases, reducing the light transmittance of the optical waveguide 110 component 100. When the thickness of the metal film 130 is greater than or equal to 2nm and less than or equal to 30nm, it can have lower manufacturing difficulty and lower light loss.

[0171] In one example, the thickness of the metal film 130 can be 2nm, 4nm, 6nm, 8nm, 10nm, 12nm, 14nm, 16nm, 18nm, 20nm, 22nm, 24nm, 26nm, 28nm, or 30nm.

[0172] The material of the metal film 130 can be Au, Ag, Al or Cr, or it can be a doped alloy material.

[0173] Please refer to Figure 2 In some embodiments, a buffer layer 140 is further disposed between the metal film 130 and the antireflection film system 10. The buffer layer 140 is used to bond the metal film 130 and the antireflection film system 10. The buffer layer 140 can improve the adhesion between the metal film 130 and the antireflection film system 10 and prevent the antireflection film system 10 from falling off. The material of the buffer layer 140 can be SiO2 or the like, so SiO2 Layer is used to represent the buffer layer 140 in the figure.

[0174] Please refer to Figure 2 In some embodiments, the thickness of the buffer layer 140 is greater than or equal to 5 nm and less than or equal to 30 nm.

[0175] If the thickness of the buffer layer 140 is too small, the increase in adhesion is minimal, which may lead to the detachment of the antireflection film system 10. Conversely, if the thickness of the buffer layer 140 is too large, it will not increase the additional adhesion but will instead waste the material of the buffer layer 140. When the thickness of the buffer layer 140 is greater than or equal to 5 nm and less than or equal to 30 nm, the buffer layer 140 can provide higher adhesion while saving the material of the buffer layer 140 and reducing the production cost of the waveguide component 100.

[0176] In one example, the thickness of the buffer layer 140 can be 5nm, 7nm, 9nm, 13nm, 16nm, 19nm, 23nm, 26nm, 29nm, or 30nm.

[0177] Please refer to Figure 2 In some embodiments, the thickness and refractive index of the antireflective coating system 10 disposed on both sides of the first cover plate 120 are distributed in a mirror-symmetric manner with respect to the first cover plate 120.

[0178] Since the first cover plate 120 can generally be made of a single material, the refractive indexes on both sides of the first cover plate 120 are the same. Therefore, the same antireflection coating system 10 can be set on both sides of the first cover plate 120, reducing the design difficulty of the antireflection coating system 10.

[0179] Please refer to Figure 4 In some embodiments, the waveguide assembly 100 further includes a second cover plate 150, which is disposed on the light-guiding side of the optical waveguide 110; the second cover plate 150 is spaced apart from the optical waveguide 110; and the anti-reflection film system 10 disposed on the light-guiding side of the optical waveguide 110 is disposed on the side of the second cover plate 150 facing away from the optical waveguide 110.

[0180] In this way, an air layer can be formed between the second cover plate 150 and the optical waveguide 110, ensuring that total internal reflection can be formed more stably on the surface of the light-guiding side of the optical waveguide 110, thereby reducing light loss in the optical waveguide 110.

[0181] Please refer to Figure 8 In some embodiments, a metal film 130 is disposed on the side of the second cover plate 150 facing away from the optical waveguide 110. In this way, the second cover plate 150 can assist the optical waveguide 110 in light transmission, that is, the metal film 130 on the second cover plate 150 can also play the role of reflecting light.

[0182] Please refer to Figure 8 In some embodiments, a metal film 130 is disposed on the side of the second cover plate 150 facing away from the optical waveguide 110, and a buffer layer 140 is disposed on the side of the metal film 130 facing away from the second cover plate 150. The buffer layer 140 can improve the adhesion between the metal film 130 and the antireflection film system 10, and prevent the antireflection film system 10 from falling off.

[0183] Please refer to Figure 5 or Figure 6 In some embodiments, a first low-refractive-index water-based adhesive layer 161 is provided on the light-emitting side of the optical waveguide 110, and the first low-refractive-index water-based adhesive layer 161 is used to adhere to the first cover plate 120.

[0184] The first low-refractive-index hydrogel layer 161 is a film layer made of LRI (Low Refractive Index Hydrogel), which can replace the air layer, but its thickness is significantly lower than that of the air layer, thus reducing the overall thickness of the waveguide component 100.

[0185] Please refer to Figure 6 and Figure 8In some embodiments, the waveguide assembly 100 further includes a second cover plate 150 disposed on the light-guiding side of the optical waveguide 110; a second low-refractive-index water-based adhesive layer 162 is disposed on the light-guiding surface of the optical waveguide 110; the second low-refractive-index water-based adhesive layer 162 is used to adhere to the second cover plate 150. The use of the second low-refractive-index water-based adhesive layer 162 instead of an air layer between the second cover plate 150 and the optical waveguide 110 can also reduce the thickness of the waveguide assembly 100.

[0186] Please refer to Figure 7 In some embodiments, the first cover plate 120 includes dark glass. Dark glass can absorb stray light and improve the display effect.

[0187] Please refer to Figure 8 and Figure 9 In some embodiments, the waveguide assembly 100 further includes a second cover plate 150, which is disposed on the light-guiding side of the optical waveguide 110; the second cover plate 150 includes dark glass. When the glass of the second cover plate 150 is dark glass, it can also absorb stray light and improve the display effect.

[0188] Please refer to Figure 10 The present invention also proposes a light field display 1000, which includes the above-mentioned antireflection film system 10. The specific structure of the antireflection film system 10 refers to the above-described embodiments. Since the light field display 1000 adopts all the technical solutions of all the embodiments of the above-described antireflection film system 10, it has at least all the beneficial effects brought about by the technical solutions of the embodiments of the above-described antireflection film system 10, which will not be described in detail here.

[0189] The light-emitting surface of the light field display 1000 does not have to be the object surface (for traditional displays, the light-emitting surface is the object surface, that is, the actual physical position of each pixel is the object surface). The light-emitting surface of the light field display 1000 can project light signals that can be imaged onto a virtual object surface. This virtual object surface can be on the side of the light field display 1000 that is away from the observer. Therefore, the observer's eye can focus on the virtual object surface, making the observer feel that the actual image seen is farther away (greater than the distance between the light-emitting surface of the light field display 1000 and the observer). At the same time, the observable virtual object surface can be larger.

[0190] The antireflective coating system 10 can be attached to the light-emitting surface of the light field display 1000 to prevent stray light from being reflected on the light-emitting surface and affecting the viewing experience.

[0191] Please refer to Figure 10This utility model also proposes another light field display 1000, including an optomechanical assembly 1100 and the aforementioned waveguide assembly 100. The specific structure of the waveguide assembly 100 is as described in the above embodiments. Since this light field display 1000 adopts all the technical solutions of all the embodiments of the aforementioned waveguide assembly 100, it at least has all the beneficial effects brought about by the technical solutions of the embodiments of the aforementioned waveguide assembly 100, which will not be described in detail here.

[0192] The optomechanical component 1100 is used to input light carrying image information into the waveguide component 100. The optomechanical component 1100 may include an optomechanical component of the type such as a MicroLED optomechanical component, an OLED optomechanical component, or an LBS optomechanical component, and inputs an optical signal into the waveguide component 100.

[0193] Please refer to Figure 11 This utility model also proposes a vehicle 10000, including the above-mentioned antireflective coating system 10, waveguide component 100, or light field display 1000; the specific structure of the antireflective coating system 10, waveguide component 100, or light field display 1000 refers to the above-mentioned embodiments. Since this vehicle 10000 adopts all the technical solutions of all the embodiments of the above-mentioned antireflective coating system 10, waveguide component 100, or light field display 1000, it has at least all the beneficial effects brought about by the technical solutions of the embodiments of the above-mentioned antireflective coating system 10, waveguide component 100, or light field display 1000, which will not be described in detail here.

[0194] The light field display 1000 can be installed behind the seat 12000, on the dashboard 11000, or on the roof of the vehicle 10000 for user viewing. Because the light field display 1000 can image onto a greater distance, it is suitable for use in confined spaces within a vehicle. The light field display 1000 can function as a sun visor display (i.e., located on the sun visor) or as AR Glass (augmented reality glass) in the interaction between the vehicle 10000 and the user, in which case it can also reduce the harmful effects of ultraviolet radiation on the eyes.

[0195] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. An antireflective membrane system, characterized in that, include: The first submembrane system includes a first submembrane and a second submembrane stacked on top of each other; the first submembrane is located on the underside of the second submembrane; the first submembrane system has at least one submembrane. A spacer membrane is disposed on the top side of the first sub-membrane system; The second sub-membrane system includes a third sub-membrane and a fourth sub-membrane stacked on top of each other; the third sub-membrane is located on the bottom side of the fourth sub-membrane; there is at least one second sub-membrane system; the second sub-membrane system is disposed on the top side of the spacer membrane. The top membrane is disposed on the top side of the second sub-membrane system; Wherein, the refractive indices of the first sub-film and the fourth sub-film are equal; the refractive indices of the second sub-film and the third sub-film are equal; the refractive index of the first sub-film is greater than the refractive index of the spacer film; the refractive index of the spacer film is greater than the refractive index of the second sub-film; and the refractive index of the second sub-film is greater than the refractive index of the top film.

2. The antireflection membrane system as described in claim 1, characterized in that, The thickness of both the first sub-film and the fourth sub-film is greater than or equal to 10 nm and less than or equal to 150 nm; and / or The thickness of the spacer membrane is greater than or equal to 10 nm and less than or equal to 150 nm; and / or The thickness of both the second sub-film and the third sub-film is greater than or equal to 3 nm and less than or equal to 100 nm; and / or The thickness of the top film is greater than or equal to 3 nm and less than or equal to 100 nm.

3. The antireflection membrane system as described in claim 1, characterized in that, The antireflective coating system also includes an antifouling membrane, which is disposed on the top side of the top membrane; the refractive index of the antifouling membrane is less than the refractive index of the second sub-membrane.

4. The antireflective membrane system as described in claim 1, characterized in that, The number of both the first submembrane system and the second submembrane system is less than or equal to 5; and / or The number of the first sub-membrane system is greater than or equal to the number of the second sub-membrane system.

5. The antireflection membrane system as described in claim 1, characterized in that, The antireflective coating system further includes a base layer disposed on the bottom side of the first sub-film system, and the base layer is used to adhere to the reflective surface.

6. A waveguide assembly, characterized in that, include: Optical waveguides are used for propagating and emitting display light; The first cover plate is disposed on the light-emitting side of the optical waveguide; An antireflective coating system includes a first sub-film system, a spacer film, a second sub-film system, and a top film. The first sub-film system includes a first sub-film and a second sub-film stacked on top of each other. The first sub-film is located on the bottom side of the second sub-film. There is at least one first sub-film system. The spacer film is disposed on the top side of the first sub-film system. The second sub-film system includes a third sub-film and a fourth sub-film stacked on top of each other. The third sub-film is located on the bottom side of the fourth sub-film. There is at least one second sub-film system. The second sub-film system is disposed on the top side of the spacer film. The top film is disposed on the top side of the second sub-film system. The refractive indices of the first sub-film and the fourth sub-film are equal. The refractive indices of the second sub-film and the third sub-film are equal. The refractive index of the first sub-film is greater than or equal to the refractive index of the spacer film. The refractive index of the spacer film is greater than the refractive index of the second sub-film. The refractive index of the second sub-film is greater than or equal to the refractive index of the top film. The antireflective coating is disposed on the light-guiding side of the optical waveguide and on both sides of the first cover plate.

7. The waveguide assembly as described in claim 6, characterized in that, The thickness of both the first sub-film and the fourth sub-film is greater than or equal to 10 nm and less than or equal to 150 nm; and / or The thickness of the spacer membrane is greater than or equal to 10 nm and less than or equal to 150 nm; and / or The thickness of both the second sub-film and the third sub-film is greater than or equal to 3 nm and less than or equal to 100 nm; and / or The thickness of the top film is greater than or equal to 3 nm and less than or equal to 100 nm.

8. The waveguide assembly as described in claim 6, characterized in that, The waveguide assembly also includes an antifouling film, which is disposed on the light-guiding side of the optical waveguide and located on the top side of the antireflection film system; the antifouling film is also disposed on the side of the first cover plate facing away from the optical waveguide and located on the top side of the antireflection film system.

9. The waveguide assembly as described in claim 8, characterized in that, The refractive index of the antifouling film is less than that of the second sub-film; and / or The antifouling film on the first cover plate has the same refractive index and thickness as the antifouling film on the optical waveguide.

10. The waveguide assembly as claimed in claim 6, characterized in that, The number of both the first submembrane system and the second submembrane system is less than or equal to 5; and / or The number of the first sub-membrane system is greater than or equal to the number of the second sub-membrane system.

11. The waveguide assembly as claimed in claim 6, characterized in that, The antireflective coating system further includes a substrate layer disposed on the bottom side of the first sub-film system; an optical adhesive layer is disposed between the substrate layer and the first cover plate and the optical waveguide; and / or The waveguide assembly further includes a second cover plate, which is disposed on the light-guiding side of the optical waveguide. The antireflective coating disposed on the light-guiding side of the optical waveguide is disposed on the side of the second cover plate facing away from the optical waveguide. An optical adhesive layer is disposed between the substrate layer and the second cover plate.

12. The waveguide assembly as claimed in claim 6, characterized in that, A metal film is also disposed on the light-guiding surface of the optical waveguide, and the anti-reflection film disposed on the light-guiding surface of the optical waveguide is disposed on the top side of the metal film.

13. The waveguide assembly as claimed in claim 12, characterized in that, The thickness of the metal film is greater than or equal to 2 nm and less than or equal to 30 nm.

14. The waveguide assembly as claimed in claim 12, characterized in that, A buffer layer is also provided between the metal film and the antireflection membrane system, the buffer layer being used to bond the metal film and the antireflection membrane system.

15. The waveguide assembly as claimed in claim 14, characterized in that, The thickness of the buffer layer is greater than or equal to 5 nm and less than or equal to 30 nm.

16. The waveguide assembly as claimed in claim 6, characterized in that, The thickness and refractive index of the antireflective coating system disposed on both sides of the first cover plate are distributed symmetrically with respect to the first cover plate.

17. The waveguide assembly as claimed in claim 6, characterized in that, The waveguide assembly further includes a second cover plate, which is disposed on the light-guiding side of the optical waveguide; the second cover plate is spaced apart from the optical waveguide; the antireflection film disposed on the light-guiding side of the optical waveguide is disposed on the side of the second cover plate facing away from the optical waveguide.

18. The waveguide assembly as claimed in claim 17, characterized in that, A metal film is disposed on the side of the second cover plate facing away from the optical waveguide; or A metal film is disposed on the side of the second cover plate facing away from the optical waveguide, and a buffer layer is disposed on the side of the metal film facing away from the second cover plate.

19. The waveguide assembly as claimed in claim 6, characterized in that, A first low-refractive-index water-based adhesive layer is disposed on the light-emitting side of the optical waveguide, the first low-refractive-index water-based adhesive layer being used to adhere to the first cover plate; and / or The waveguide assembly further includes a second cover plate, which is disposed on the light-guiding side of the optical waveguide; a second low-refractive-index water-based adhesive layer is disposed on the light-guiding surface of the optical waveguide; the second low-refractive-index water-based adhesive layer is used to bond with the second cover plate.

20. The waveguide assembly as claimed in claim 6, characterized in that, The first cover plate includes dark glass; and / or The waveguide assembly further includes a second cover plate disposed on the light-guiding side of the optical waveguide; the second cover plate comprises dark glass.

21. A light field display, characterized in that, Includes an optomechanical assembly and a waveguide assembly as described in any one of claims 6-20; the optomechanical assembly is used to input light carrying image information to the waveguide assembly; or Including the antireflection membrane system as described in any one of claims 1-5.

22. A vehicle, characterized in that, This includes the antireflection coating system as described in any one of claims 1-5, the waveguide assembly as described in any one of claims 6-20, or the light field display as described in claim 21.

Images