Waveguide module and augmented reality equipment

Abstract

The invention provides a waveguide module and augmented reality equipment. The waveguide module comprises an optical waveguide, the optical waveguide comprises an optical conduction layer and a grating structure, and the grating structure is arranged on the surface of the optical conduction layer; the first protection lenses are stacked and arranged on the side, provided with the grating structure, of the optical waveguide at intervals; the first supporting layer comprises a plurality of first supporting pieces, the plurality of first supporting pieces are arranged on the surface, facing the optical waveguide, of the first protection lens at intervals and connected with the first protection lens, and one end, deviating from the first protection lens, of one part of the plurality of first supporting pieces abuts against the optical conduction layer; one end, deviating from the first protection lens, of the other part of the plurality of first supporting pieces abuts against the grating structure; and the first bonding piece is arranged between the optical waveguide and the first protection lens, surrounds the periphery of the first supporting layer and is used for bonding the optical waveguide and the first protection lens. The waveguide module can improve the Newton ring phenomenon generated under low temperature or external force.

Description

Technical Field

[0001] The present application relates to the field of electronics, and in particular to a waveguide module and an augmented reality device. Background Art

[0002] Augmented reality (AR) technology can combine virtual reality with reality and is now being used more and more widely. Optical waveguides are essential components of AR devices. Optical waveguides are usually provided with protective sheets on both sides. The protective sheets are easily dented by force and when they are attached to the optical waveguide, Newton rings are generated, which affects the display effect of AR devices. Summary of the invention

[0003] The embodiment of the present application provides a waveguide module, which can improve the Newton ring phenomenon generated by the waveguide module under low temperature or external force.

[0004] In a first aspect, an embodiment of the present application provides a waveguide module, comprising:

[0005] An optical waveguide, the optical waveguide comprising a light-conducting layer and a grating structure, wherein the grating structure is disposed on a surface of the light-conducting layer;

[0006] A first protective lens, wherein the first protective lens is stacked and spaced apart and arranged on a side of the optical waveguide having the grating structure;

[0007] A first supporting layer, the first supporting layer comprising a plurality of first supporting members, the plurality of first supporting members being spaced apart and arranged on a surface of the first protective lens facing the optical waveguide and connected to the first protective lens, one end of a portion of the plurality of first supporting members facing away from the first protective lens abutting against the light conductive layer, and one end of another portion of the plurality of first supporting members facing away from the first protective lens abutting against the grating structure; and

[0008] A first adhesive member is disposed between the optical waveguide and the first protective lens and surrounds the outer periphery of the first supporting layer, and is used for bonding the optical waveguide and the first protective lens.

[0009] In a second aspect, an embodiment of the present application further provides an augmented reality device, comprising:

[0010] A projection optical machine, the projection optical machine is used to project a light signal, the light signal includes image information; and

[0011] The waveguide module described in the first aspect of the present application is used to transmit the optical signal and project the image information in the optical signal.

[0012] The waveguide module of the embodiment of the present application is provided with a first support layer between the first protective lens and the optical waveguide, the first support layer includes a plurality of first support members, the plurality of first support members are spaced apart, one end of a part of the plurality of first support members away from the first protective lens abuts against the optical transmission layer, and one end of another part of the plurality of first support members away from the first protective lens abuts against the grating structure, so that the optical waveguide is evenly distributed with the first support members in the non-grating structure area of ​​the grating structure area, and the entire surface of the first support members can play a better supporting role for the first protective lens; when the waveguide module is in a low temperature environment or subjected to external force, due to the entire surface of the first support members, the optical waveguide is The first supporting member on the surface of the optical waveguide has a supporting effect, so that the first protective lens will not be sunken, thereby avoiding the Newton ring phenomenon when the waveguide module is in a low temperature environment or subjected to external force; in addition, the first supporting layer can also make the optical waveguide and the first protective lens always maintain a high degree of parallelism, thereby avoiding the ghost image generated by the first protective lens and the display image of the optical waveguide from overlapping, avoiding the occurrence of double images and affecting the display effect of the waveguide module; furthermore, the first supporting layer adopts the form of multiple first supporting members arranged at intervals, that is, a dot matrix supporting structure, and the contact area between the first supporting member and the optical waveguide is small, thereby not having a significant adverse effect on the display content of the optical waveguide. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 It is a schematic diagram of the top view structure of a waveguide module according to an embodiment of the present application.

[0015] Figure 2 The waveguide module of one embodiment of the present application is Figure 1 Schematic diagram of the cross-sectional structure in the AA direction.

[0016] Figure 3 1 is a schematic diagram of a top view of the optical waveguide according to an embodiment of the present application.

[0017] Figure 4 FIG. 4 is a schematic diagram of a top view of the optical waveguide according to another embodiment of the present application.

[0018] Figure 5 The waveguide module of another embodiment of the present application is Figure 1 Schematic diagram of the cross-sectional structure in the AA direction.

[0019] Figure 6 yes Figure 2 Enlarged view of the dashed box I in the middle.

[0020] Figure 7 yes Figure 5 Enlarged view of the dashed box II.

[0021] Figure 8 yes Figure 2 Enlarged view of the dashed box III.

[0022] Fig. 9 It is a schematic diagram of the process of preparing the first supporting layer.

[0023] Fig.10 It is a schematic diagram of the preparation process structure of the first support layer.

[0024] Fig.11 It is a schematic diagram of the top structure of the silk-screen printing plate of one embodiment of the present application.

[0025] Fig.12 It is a structural diagram of an augmented reality device according to an embodiment of the present application.

[0026] Fig.13 The augmented reality device of an embodiment of the present application is Fig.12 Schematic diagram of the cross-sectional structure in the DD direction.

[0027] Fig.14 It is a circuit block diagram of an augmented reality device according to an embodiment of the present application.

[0028] Description of reference numerals:

[0029] 100-waveguide module, 10-optical waveguide, 11-light conductive layer, 12-grating structure, 121-coupling grating, 122-coupling grating, 123-turning grating, 20-first protective lens, 30-first supporting layer, 31-first supporting member, 40-first adhesive member, 50-second protective lens, 60-second supporting layer, 61-second supporting member, 70-second adhesive member, 100a-silk screen printing plate, 101a-through hole, 200-augmented reality device, 210-projection optical machine, 211-display, 213-lens, 220-carrying member, 230-wearing member, 231-first wearing sub-member, 233-second wearing sub-member, 240-processor, 260-memory. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0032] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings. It should be noted that, for ease of description, in the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments.

[0033] Augmented reality is a technology that provides users with an enhanced sense of reality by superimposing computer-generated image input onto images of the real world and inputting them into the human eye. It is currently being used more and more widely. Optical waveguides are dielectric devices that guide light waves to propagate in them, and are essential components of augmented reality devices. Optical waveguides include geometric optical waveguides and diffraction optical waveguides. Compared with geometric optical waveguides, the gratings of diffraction optical waveguides have higher flexibility in design and production, higher mass manufacturability and yield, and are therefore more widely used. For example, the diffraction optical waveguide solution for AR glasses is a mainstream technical solution because its optical lenses are thin and light, and its appearance is closer to traditional glasses. At the same time, it is more convenient to implement and easier to mass produce. Diffraction optical waveguides can be further divided into surface relief gratings and volume holographic gratings.

[0034] Diffraction optical waveguides, such as surface relief optical waveguides, can be prepared on a glass substrate by a nanoimprint process to prepare a grating structure on a glass substrate, thereby obtaining an optical waveguide. The density of the glass substrate is high, and when used in augmented reality glasses, the bridge of the nose bears a heavy load, which is not user-friendly; and because glass is brittle, the mechanical reliability of glass optical waveguides is poor, and it is very fragile when it falls, and the glass breaks into sharp glass slag, which is dangerous. Diffraction optical waveguides can also use injection molding or casting molding to prepare optical waveguides in which the light transmission layer and the grating are integrated and made of the same material. However, due to the limitations of the injection molding process and the casting molding process materials, the refractive index of the material is low, so the refractive index of the obtained coupling grating is also low, which will reduce the efficiency of the coupling grating to couple the optical signal and reduce the optical efficiency of the optical waveguide.

[0035] Glass material has poor drop resistance and is easy to break when it falls. Although the use of a plastic frame to bond protective lenses (such as chemically strengthened glass or sapphire) on the two opposite surfaces of the glass optical waveguide can improve the protection of the optical waveguide to a certain extent, the drop resistance is still poor, and the glass optical waveguide is heavy, resulting in a high weight of the entire device when used in augmented reality equipment, which is not conducive to long-term wear. In order to improve the above problems, a resin optical waveguide can be used instead of a glass optical waveguide, and a resin protective lens can be used instead of a glass protective lens, which can not only greatly reduce the weight of the waveguide module (the weight can be reduced by more than 50%), but also solve the problem of the optical waveguide being easily broken when it falls.

[0036] When the optical waveguide and the protective lens are bonded with a rubber frame, there is a gap between the optical waveguide and the protective sheet. In order to prevent dust and water, the grating area of ​​the optical waveguide is in a completely sealed state. Since the protective lens of the waveguide module is bonded at room temperature, when the waveguide module is in a low temperature environment, due to the thermal expansion and contraction effect of the gas, the volume of gas in the sealed area where the grating on the optical waveguide is located is reduced, and the air pressure drops sharply. For glass-based waveguide modules, since the protective lens is sapphire or tempered glass, the rigidity is very good, so when the air pressure drops, there will be no great depression; and for plastic-based waveguide modules, since the protective lens is plastic, the rigidity is relatively low, so when the air pressure drops, the protective lens (the protective lens facing away from the human eye when in use, or the protective lens set on the side of the optical waveguide with the grating layer 13) will be seriously depressed, and even part of the area will be directly bonded to the surface of the optical waveguide. When the distance between the protective lens and the optical waveguide is too small or even close to each other, Newton rings and adhesion will occur between the protective lens and the optical waveguide. Newton rings are a series of colored rings of different colors, which will seriously affect the transmittance of the waveguide module and cause great interference to the user's use of AR devices. In addition, when the surface of the waveguide module is dirty, when wiping the surface of the waveguide module, the waveguide module will bend due to force during wiping, causing the protective lens to sag. There is also a high possibility that the gap between the protective lens and the optical waveguide is too small, which will cause Newton rings and adhesion.

[0037] The principle of Newton's rings is: when the protective lens is concave and fits with the optical waveguide, a circle of nanometer-scale air film will be generated around the fitting area of ​​the protective lens and the optical waveguide. When ambient light is incident, part of the light will be directly reflected by the surface of the protective lens, and part of the light will pass through the protective lens and shine on the optical waveguide, and be reflected by the surface of the optical waveguide; because light has wave properties, when the thickness of the air film is 1 / 4 of the wavelength of light, the light reflected by the surface of the optical waveguide and the light reflected by the surface of the protective lens have a phase difference of 1 / 2 wavelength, and because these two beams of light are the same incident light and are mutually coherent, when the phase difference of the two beams of light is 1 / 2 wavelength, they will cancel each other out. In addition, since the incident ambient light is mixed light, different colors of light have different wavelengths. For example, when the thickness of the air film is 1 / 4 of the wavelength of green light, the green light in the two beams of light in this area cancel each other out, leaving only the mixed light of the remaining visible light, which is displayed as a colored halo. Similarly, when the thickness of the air film is 1 / 4 of the wavelength of other colors of light, other colors will be displayed. In summary, Newton rings of different colors will appear around the fitting area. In addition, when the protective lens is concave, the ghost image produced by the protective lens will not overlap with the displayed image of the optical waveguide, resulting in double images.

[0038] See also Figure 1 and Figure 2 The embodiment of the present application provides a waveguide module 100, which includes an optical waveguide 10, a first protective lens 20, a first supporting layer 30 and a first adhesive member 40. The optical waveguide 10 is used to transmit the optical signal and project the image information in the optical signal. The optical waveguide 10 includes an optical conductive layer 11 and a grating structure 12. The grating structure 12 is arranged on the surface of the optical conductive layer 11; the optical conductive layer 11 is used to transmit the optical signal entering the optical conductive layer 11, and the grating layer is used to couple the optical signal into and out of the optical conductive layer 11; the first protective lens 20 is stacked and spaced apart on one side of the optical waveguide 10; the first supporting layer 30 includes a plurality of first supporting members 31, and the plurality of first supporting members 31 are spaced apart The first protective lens 20 is arranged on the surface facing the optical waveguide 10 and connected to the first protective lens 20. One end of a part of the plurality of first supporting members 31 facing away from the first protective lens 20 abuts against the light conductive layer 11, and another end of the plurality of first supporting members 31 facing away from the first protective lens 20 abuts against the grating structure 12. The first adhesive member 40 is arranged between the optical waveguide 10 and the first protective lens 20 and is arranged around the periphery of the first supporting layer 30, so as to bond the optical waveguide 10 to the first protective lens 20.

[0039] The waveguide module 100 of the embodiment of the present application can be applied to near-eye display systems such as augmented reality glasses, augmented reality helmets, and augmented reality masks.

[0040] Optionally, the plurality of first support members 31 are periodically distributed on the surface of the first protective lens 20. Optionally, the distribution period of the plurality of first support members 31 is much greater than the period of the grating structure 12 of the optical waveguide 10, for example, greater than 20 times. Specifically, the distribution period of the first support members 31 is 20 to several thousand times the period of the grating structure 12; for example: 50 times, 100 times, 300 times, 500 times, 1000 times, 2000 times, 3000 times, etc. Further, the plurality of first support members 31 are arranged in an array on the surface of the first protective lens 20.

[0041] One end of a portion of the plurality of first support members 31 facing away from the first protective lens 20 abuts against the light conductive layer 11, and another end of the plurality of first support members 31 facing away from the first protective lens 20 abuts against the grating structure 12; it can be understood that a plurality of first support members 31 are provided in both the grating structure 12 region and the region outside the grating structure 12 on the optical waveguide 10.

[0042] Optionally, the first adhesive member 40 is a glue frame, that is, a hollow annular adhesive layer, such as liquid optical glue (Optical Clear Resin, referred to as OCR glue), optical glue (Optically Clear Adhesive, referred to as OCA glue), etc. It can be understood that the first adhesive member 40, the first protective lens 20 and the optical waveguide 10 enclose a closed space (not shown), and the first support member 31 is accommodated in the closed space. The first adhesive member 40 is used to fit the first protective lens 20 and the optical waveguide 10, and to keep a certain gap between the first protective lens 20 and the optical waveguide 10 to avoid the first protective lens 20 fitting the optical waveguide 10 and affecting the transmission of the optical signal in the optical waveguide 10.

[0043] Optionally, the material of the first protective lens 20 may be, but is not limited to, polymethyl methacrylate, polycarbonate, and the like.

[0044] The waveguide module 100 of the embodiment of the present application is provided with a first support layer 30 between the first protective lens 20 and the optical waveguide 10, and the first support layer 30 includes a plurality of first support members 31, and the plurality of first support members 31 are distributed at intervals, and one end of a part of the plurality of first support members 31 away from the first protective lens 20 abuts against the light transmission layer 11, and another end of the plurality of first support members 31 away from the first protective lens 20 abuts against the grating structure 12, so that the optical waveguide 10 is evenly distributed in the area of ​​the non-grating structure 12 in the area of ​​the grating structure 12, and the first support members 31 on the whole surface can play a better supporting role for the first protective lens 20; when the waveguide module 100 is in a low temperature environment or is exposed to external When a force is applied, the first protective lens 20 will not be dented due to the supporting effect of the first supporting member 31 on the entire surface, thereby avoiding the Newton ring phenomenon when the waveguide module 100 is in a low temperature environment or subjected to an external force; in addition, the first supporting layer 30 can also enable the optical waveguide 10 and the first protective lens 20 to always maintain a high degree of parallelism, thereby avoiding the ghost image generated by the first protective lens 20 and the display image of the optical waveguide 10 from not overlapping, avoiding the occurrence of double images and affecting the display effect of the waveguide module 100; furthermore, the first supporting layer 30 adopts the form of a plurality of first supporting members 31 arranged at intervals, that is, a dot matrix supporting structure, and the contact area between the first supporting member 31 and the optical waveguide 10 is small, thereby not having a significant adverse effect on the display content of the optical waveguide 10.

[0045] In addition, the plurality of first support members 31 are in uniform contact with the optical waveguide 10 , which can improve the parallelism of the first protective lens 20 and reduce the probability of ghost images caused by the non-parallelism produced by the bonding.

[0046] See also Figure 3 Optionally, the grating structure 12 includes a coupling-in grating 121 and a coupling-out grating 122 which are spaced apart on the surface of the light-conducting layer 11 , the coupling-in grating 121 is used to couple the optical signal into the light-conducting layer 11 , and the coupling-out grating 122 is used to couple the optical signal transmitted through the light-conducting layer 11 out of the optical waveguide 10 .

[0047] Optionally, the coupling-in grating 121 may be, but not limited to, one of a binary grating, a tilted grating, a blazed grating, a two-dimensional grating, etc. The coupling-out grating 122 may be, but not limited to, one of a binary grating, a tilted grating, a blazed grating, a two-dimensional grating, etc. The coupling-in grating 121 and the coupling-out grating 122 may be of the same type or different types.

[0048] Optionally, the grating period of the coupling-in grating 121 ranges from 200nm to 800nm, and the grating depth is ≤300nm. The grating period of the coupling-out grating 122 ranges from 200nm to 800nm, and the grating depth is ≤300nm. In the embodiment of the present application, when it comes to the numerical range a to b, unless otherwise specified, it means that the numerical value can be any numerical value between a and b, including the endpoint numerical value a, and including the endpoint numerical value b.

[0049] See also Figure 4 Optionally, the grating layer 13 further includes a turning grating 123, and the turning grating 123 is used to expand the pupil of the image information in the optical signal. The turning grating 123, the coupling-in grating 121, and the coupling-out grating 122 are respectively arranged on the same surface of the optical transmission layer 11 at intervals. When the grating layer 13 further includes the turning grating 123, the optical signal coupled into the optical transmission layer 11 is firstly expanded by the turning grating 123, and then coupled out of the optical waveguide 10 by the coupling-out grating 122.

[0050] Optionally, the turning grating 123 may be, but is not limited to, one of a binary grating, a tilted grating, a blazed grating, a two-dimensional grating, etc. The turning grating 123, the coupling-in grating 121, and the coupling-out grating 122 may be of the same type or different types. Optionally, the grating period of the turning grating 123 ranges from 200 nm to 800 nm, and the grating depth is ≤300 nm.

[0051] See also Figure 5 In some embodiments, the waveguide module 100 further includes a second protective lens 50, a second supporting layer 60 and a second adhesive member 70. The second protective lens 50 is stacked and spaced apart on the side of the optical waveguide 10 away from the first protective lens 20; the second supporting layer 60 includes a plurality of second supporting members 61, which are spaced apart on the surface of the second protective lens 50 facing the optical waveguide 10 and connected to the second protective lens 50, and one end of each second supporting member 61 away from the second protective lens 50 abuts against the optical waveguide 10; the second adhesive member 70 is disposed between the optical waveguide 10 and the second protective lens 50 and around the outer periphery of the second supporting layer 60, for bonding the optical waveguide 10 to the second protective lens 50.

[0052] It can be understood that the first protective lens 20, the optical waveguide 10 and the second protective lens 50 are stacked in sequence and arranged at intervals to form a sandwich-like stacking structure.

[0053] Optionally, the plurality of second support members 61 are periodically distributed on the surface of the second protective lens 50. Optionally, the distribution period of the plurality of second support members 61 is much greater than the period of the grating structure 12 of the optical waveguide 10, for example, greater than 20 times, specifically, the distribution period of the second support members 61 is 20 times to several thousand times the period of the grating structure 12; for example: 50 times, 100 times, 300 times, 500 times, 1000 times, 2000 times, 3000 times, etc. Further, the plurality of second support members 61 are arranged in an array on the surface of the second protective lens 50.

[0054] Optionally, the second adhesive member 70 is a glue frame, that is, a hollow annular adhesive layer, such as OCR glue, OCA glue, etc. It can be understood that the second adhesive member 70, the second protective lens 50 and the optical waveguide 10 enclose a closed space (not shown), and the second support member 61 is accommodated in the closed space. The second adhesive member 70 is used to fit the second protective lens 50 and the optical waveguide 10, and to keep a certain gap between the second protective lens 50 and the optical waveguide 10 to avoid the second protective lens 50 fitting the optical waveguide 10 and affecting the transmission of the optical signal in the optical waveguide 10.

[0055] Optionally, the material of the second protective lens 50 may be, but is not limited to, polymethyl methacrylate, polycarbonate, and the like.

[0056] In this embodiment, by providing the second protective lens 50, the optical waveguide 10 can be better protected. By providing the second supporting layer 60, the second supporting layer 60 includes a plurality of second supporting members 61 arranged at intervals. By providing the second supporting member 61 on the entire surface, the second protective lens 50 can be better supported. When the waveguide module 100 is in a low temperature environment or subjected to external force, due to the supporting effect of the second supporting member 61 on the entire surface, the first protective lens 20 will not be sunken, thereby avoiding the Newton ring phenomenon generated when the waveguide module 100 is in a low temperature environment or subjected to external force. In addition, the second supporting layer 60 can also make the optical waveguide 10 and the second protective lens 50 always maintain a high degree of parallelism, thereby avoiding the ghost image generated by the second protective lens 50 from not overlapping with the display image of the optical waveguide 10, avoiding the occurrence of double images, and affecting the display effect of the waveguide module 100, thereby greatly improving the life and reliability of the waveguide module 100; furthermore, the second supporting layer 60 adopts the form of multiple second supporting members 61, that is, a dot matrix supporting structure, and the contact area between the second supporting member 61 and the optical waveguide 10 is small, so as not to have a significant adverse effect on the display content of the optical waveguide 10.

[0057] Optionally, the shape of the first support member 31 may be, but is not limited to, a regular shape such as a hemispherical shape, a conical shape, a cylindrical shape, etc. In other embodiments, it may also be an irregular shape. In the drawings of the present application, the first support member 31 is illustrated as a hemispherical shape, which should not be understood as a limitation on the first support member 31. When the shape of the first support member 31 is a hemispherical shape, the contact area between the first support member 31 and the optical waveguide 10 can be better reduced, thereby better avoiding the first support member 31 from having an adverse effect on the display content of the optical waveguide 10.

[0058] Optionally, the shape of the second support member 61 may be, but is not limited to, a regular shape such as a hemispherical shape, a conical shape, a cylindrical shape, etc. In other embodiments, it may also be an irregular shape. In the drawings of the present application, the second support member 61 is illustrated as a hemispherical shape, which should not be understood as a limitation on the second support member 61. When the shape of the second support member 61 is a hemispherical shape, the contact area between the second support member 61 and the optical waveguide 10 can be better reduced, thereby better avoiding the second support member 61 from having an adverse effect on the display content of the optical waveguide 10.

[0059] Optionally, along the stacking direction of the first protective lens 20, the optical waveguide 10 and the second protective lens 50: the range of the height difference △h1 between any two of the plurality of first support members 31 is: 0≤△h1≤1μm. In other words, along the stacking direction of the first protective lens 20, the optical waveguide 10 and the second protective lens 50: the range of the height difference △h1 between the highest first support member 31 and the shortest first support member 31 among the plurality of first support members 31 is: 0≤△h1≤1μm. Specifically, the height difference △h1 between any two of the plurality of first support members 31 can be, but is not limited to, 0, 0.1μm, 0.2μm, 0.3μm, 0.4μm, 0.5μm, 0.6μm, 0.7μm, 0.8μm, 0.9μm, 1μm, etc. The smaller the height difference between any two first support members 31 among the multiple first support members 31, the better each first support member 31 can abut against the optical waveguide 10, and the better the parallelism between the first protective lens 20 and the optical waveguide 10, which can better prevent the generation of ghost images, but the difficulty of preparing the first support members 31 will increase; when the height difference between any two first support members 31 among the multiple first support members 31 is too large, the more first support members 31 among the multiple first support members 31 that cannot abut against the optical waveguide 10, the lower the supporting effect of the first support layer 30 on the first protective lens 20, and the lower the parallelism between the first protective lens 20 and the optical waveguide 10, and the probability of ghost images in the optical waveguide 10 is increased.

[0060] Optionally, along the stacking direction of the first protective lens 20, the optical waveguide 10 and the second protective lens 50: the range of the height difference △h2 between any two of the plurality of second support members 61 is: 0≤△h2≤1μm. In other words, along the stacking direction of the first protective lens 20, the optical waveguide 10 and the second protective lens 50: the range of the height difference △h2 between the highest second support member 61 and the best second support member 61 among the plurality of second support members 61 is: 0≤△h2≤1μm. Specifically, the height difference △h2 between any two of the plurality of second support members 61 can be, but is not limited to, 0, 0.1μm, 0.2μm, 0.3μm, 0.4μm, 0.5μm, 0.6μm, 0.7μm, 0.8μm, 0.9μm, 1μm, etc. The smaller the height difference between any two second support members 61 among the multiple second support members 61, the better the parallelism between the second protective lens 50 and the optical waveguide 10, which can better prevent the generation of ghost images, but the difficulty of preparing the second support members 61 will increase; when the height difference between any two second support members 61 among the multiple second support members 61 is too large, the more second support members 61 among the multiple second support members 61 that cannot resist the optical waveguide 10 are, the lower the supporting effect of the second support layer 60 on the second protective lens 50, and the lower the parallelism between the second protective lens 50 and the optical waveguide 10, and the probability of ghost images in the optical waveguide 10 is increased.

[0061] See also Figure 6, Optionally, along the stacking direction of the first protective lens 20, the optical waveguide 10 and the second protective lens 50: the range of the height h1 of each first support member 31 is: 8μm≤h1≤30. Further, the range of the height h1 of each first support member 31 is: 8μm≤h1≤20μm. Specifically, the height h1 of each first support member 31 can be, but is not limited to, 8μm, 10μm, 12μm, 14μm, 16μm, 18μm, 20μm, 22μm, 24μm, 26μm, 28μm, 30μm, etc. If the height of the first support member 31 is too small, the thickness of the air film between the first protective lens 20 and the optical waveguide 10 is small, and there is still a risk of generating Newton's rings visible to the naked eye; when the height of the first support member 31 is greater than or equal to 8μm, the thickness of the air film between the first protective lens 20 and the optical waveguide 10 is greater than or equal to 8μm, then the phase difference between the light reflected by the surface of the optical waveguide 10 and the light reflected by the surface of the first protective lens 20 exceeds 10 times the wavelength of the light, and the energy of the interfering light is weak. At this time, it is difficult to observe the Newton's rings with the naked eye. Therefore, this solution can basically solve the problem of Newton's rings; when the height of the first support member 31 is too large, the first support member 31 is too obvious and visible to the naked eye. When the waveguide module 100 is applied to an augmented reality device, it affects the wearing visual experience of the augmented reality device.

[0062] See also Figure 7 , Optionally, along the stacking direction of the first protective lens 20, the optical waveguide 10 and the second protective lens 50: the range of the height h2 of each first support member 31 is: 8μm≤h2≤30μm. Further, the range of the height h2 of each second support member 61 is: 8μm≤h2≤20μm. Specifically, the height h2 of each second support member 61 can be, but is not limited to, 8μm, 10μm, 12μm, 14μm, 16μm, 18μm, 20μm, 22μm, 24μm, 26μm, 28μm, 30μm, etc. If the height of the second support member 61 is too small, the thickness of the air film between the second protective lens 50 and the optical waveguide 10 is small, and there is still a risk of generating Newton's rings visible to the naked eye; when the height of the second support member 61 is greater than or equal to 8μm, the thickness of the air film between the second protective lens 50 and the optical waveguide 10 is greater than or equal to 8μm, then the phase difference between the light reflected by the surface of the optical waveguide 10 and the light reflected by the surface of the second protective lens 50 exceeds 10 times the wavelength of light, and the energy of the interfering light is weak. At this time, it is difficult to observe Newton's rings with the naked eye. Therefore, this solution can basically solve the problem of Newton's rings; when the height of the second support member 61 is too large, the second support member 61 is too obvious and visible to the naked eye. When the waveguide module 100 is applied to an augmented reality device, it affects the wearing visual experience of the augmented reality device.

[0063] Optionally, the first adhesive member 40 has compressibility and adhesiveness, and along the stacking direction of the first protective lens 20, the optical waveguide 10 and the second protective lens 50: the difference between the thickness d1 of the first adhesive member 40 and the height h1 of the first support member 31 is in the range of 2μm≤d1-h1≤4μm. Specifically, the difference d1-h1 between the thickness d1 of the first adhesive member 40 and the height h1 of the first support member 31 can be, but is not limited to, 2μm, 2.2μm, 2.4μm, 2.6μm, 2.8μm, 3μm, 3.2μm, 3.4μm, 3.6μm, 3.8μm, 4μm, etc. When the difference between the thickness d1 of the first adhesive member 40 and the height h1 of the first support member 31 is too small, after the waveguide module 100 is assembled, it is easy to cause the bonding strength between the optical waveguide 10 and the first protective lens 20 to be low and the reliability to be poor. During use, there is a risk of separation of the first protective lens 20 from the optical waveguide 10 (i.e., debonding or opening), water ingress, dust ingress, etc.; when the difference between the thickness d1 of the first adhesive member 40 and the height h1 of the first support member 31 is too large, the multiple first support members 31 of the first support layer 30 are difficult to completely support the optical waveguide 10, and there is a problem of uneven fitting, which reduces the parallelism of the first protective lens 20 and the optical waveguide 10; in addition, when the waveguide module 100 is subjected to force or is in a low temperature environment, the risk of the first protective lens 20 being dented is increased, and the parallelism of the first protective lens 20 and the optical waveguide 10 is further reduced, so that the waveguide module 100 has the risk of generating ghost images.

[0064] It should be noted that, in the present embodiment, the thickness d1 of the first adhesive member 40 refers to the thickness of the first adhesive member 40 before being assembled to the optical waveguide 10. After the first adhesive member 40 is assembled to the optical waveguide 10, the thickness of the first adhesive member 40 is compressed, so that the end of the first support member 31 away from the first protective lens 20 abuts against the optical waveguide 10.

[0065] Optionally, the second adhesive member 70 has compressibility and adhesiveness, and along the stacking direction of the first protective lens 20, the optical waveguide 10 and the second protective lens 50: the difference between the thickness d2 of the second adhesive member 70 and the height h2 of the second support member 61 is in the range of 2μm≤d2-h2≤4μm. Specifically, the difference d2-h2 between the thickness d2 of the second adhesive member 70 and the height h2 of the second support member 61 can be, but not limited to, 2μm, 2.2μm, 2.4μm, 2.6μm, 2.8μm, 3μm, 3.2μm, 3.4μm, 3.6μm, 3.8μm, 4μm, etc. When the difference between the thickness d2 of the second adhesive 70 and the height h2 of the second support member 61 is too small, after the waveguide module 100 is assembled, it is easy to cause the bonding strength between the optical waveguide 10 and the second protective lens 50 to be low and the reliability to be poor. During use, there is a risk of separation of the second protective lens 50 from the optical waveguide 10 (i.e., debonding or opening), water ingress, dust ingress, etc.; when the difference between the thickness d2 of the second adhesive 70 and the height h2 of the second support member 61 is too large, the multiple second support members 61 of the second support layer 60 are difficult to completely support the optical waveguide 10, and there is a problem of uneven fitting, which reduces the parallelism of the second protective lens 50 and the optical waveguide 10; in addition, when the waveguide module 100 is subjected to force or is in a low temperature environment, the risk of the second protective lens 50 being dented is increased, and the parallelism of the second protective lens 50 and the optical waveguide 10 is further reduced, so that the waveguide module 100 has the risk of generating ghost images.

[0066] It should be noted that, in the present embodiment, the thickness d2 of the second adhesive member 70 refers to the thickness of the second adhesive member 70 before being assembled to the optical waveguide 10. After the second adhesive member 70 is assembled to the optical waveguide 10, the thickness of the second adhesive member 70 is compressed, so that the end of the second support member 61 away from the second protective lens 50 abuts against the optical waveguide 10.

[0067] Optionally, along the stacking direction of the first protective lens 20, the optical waveguide 10 and the second protective lens 50, the compression rate k1 of the first adhesive member 40 is in the range of 10%≤k1≤20%. Specifically, the compression rate k1 of the first adhesive member 40 may be, but is not limited to, 10%, 12%, 14%, 16%, 18%, 20%, etc. If the compression rate of the first adhesive member 40 is too low, it will be difficult for the multiple first support members 31 to properly support the optical waveguide 10 after the waveguide module 100 is assembled, thereby reducing the supporting effect of the first support members 31 on the first protective lens 20 and increasing the risk of the first protective lens 20 being dented and generating Newton rings and ghost images. If the compression rate of the first adhesive member 40 is too high, the supporting effect of the first adhesive member 40 is reduced. When the waveguide module 100 is in a low temperature environment or subjected to external force, most of the force is applied to the first support member 31 and transmitted to the optical waveguide 10 through the first support member, which can easily damage the light transmission layer 11 or the grating structure 12 of the optical waveguide 10.

[0068] It can be understood that the compression rate k1 of the first adhesive member 40 refers to the difference between the thickness d1 of the first adhesive member 40 before being assembled to the waveguide module 100 and the thickness d1' after the first adhesive member 40 is assembled to the waveguide module 100 divided by the thickness d1 of the first adhesive member 40 before being assembled to the waveguide module 100, that is, k1 = (d1-d1') / d1×100%.

[0069] Optionally, along the stacking direction of the first protective lens 20, the optical waveguide 10 and the second protective lens 50, the compression rate k2 of the second adhesive member 70 is in the range of 10%≤k2≤20%. Specifically, the compression rate k2 of the second adhesive member 70 may be, but is not limited to, 10%, 12%, 14%, 16%, 18%, 20%, etc. If the compression rate of the second adhesive member 70 is too low, it will be difficult for the multiple second support members 61 to properly support the optical waveguide 10 after the waveguide module 100 is assembled, thereby reducing the supporting effect of the second support members 61 on the second protective lens 50 and increasing the risk of the second protective lens 50 being dented and generating Newton rings and ghost images. If the compression rate of the second adhesive member 70 is too high, the supporting effect of the second adhesive member 70 is reduced. When the waveguide module 100 is in a low temperature environment or subjected to external force, most of the force is applied to the second support member 61 and transmitted to the optical waveguide 10 through the second support member, which can easily damage the light transmission layer 11 or the grating structure 12 of the optical waveguide 10.

[0070] It can be understood that the compression rate k2 of the second adhesive 70 refers to the difference between the thickness d2 of the second adhesive 70 before being assembled to the waveguide module 100 and the thickness d2' of the second adhesive 70 after being assembled to the waveguide module 100 divided by the thickness d2 of the second adhesive 70 before being assembled to the waveguide module 100, that is, k2 = (d2-d2') / d2×200%.

[0071] See also Figure 6 , optionally, the maximum width w1 of the orthographic projection of the first support member 31 on the surface of the first protective lens 20 facing the light conductive layer 11 is in the range of 20μm≤w1≤100μm. In other words, the distance w1 between the two farthest points on the orthographic projection of the first support member 31 on the surface of the first protective lens 20 facing the light conductive layer 11 is in the range of 20μm≤w1≤100μm. Further, the maximum width w1 of the orthographic projection of the first support member 31 on the surface of the first protective lens 20 facing the light conductive layer 11 is in the range of 20μm≤w1≤60μm. Further, the maximum width w1 of the orthographic projection of the first support member 31 on the surface of the first protective lens 20 facing the light conductive layer 11 is in the range of 20μm≤w1≤40μm. Specifically, the maximum width w1 of the orthographic projection of the first support member 31 on the surface of the first protective lens 20 facing the light conductive layer 11 may be, but is not limited to, 20 μm, 23 μm, 25 μm, 28 μm, 30 μm, 33 μm, 35 μm, 38 μm, 40 μm, 45 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, etc. When the maximum width w1 of the orthographic projection of the first support member 31 on the surface of the first protective lens 20 facing the light conductive layer 11 is too small, the first support member 31 cannot produce sufficient supporting effect, and when the first protective lens 20 is recessed, the thickness of the air gap formed between the first protective lens 20 and the optical waveguide 10 is small, and there is still a risk of generating Newton rings visible to the naked eye; when the maximum width w1 of the orthographic projection of the first support member 31 on the surface of the first protective lens 20 facing the light conductive layer 11 is too large, the first support member 31 is too obvious and visible to the naked eye, and when the waveguide module 100 is applied to an augmented reality device, it affects the wearing visual experience of the augmented reality device.

[0072] See also Figure 7, optionally, the maximum width w2 of the orthographic projection of the second support member 61 on the surface of the second protective lens 50 facing the light-conducting layer 11 is in the range of 20μm≤w2≤100μm. In other words, the distance w2 between the two farthest points on the orthographic projection of the second support member 61 on the surface of the second protective lens 50 facing the light-conducting layer 11 is in the range of 20μm≤w2≤100μm. Further, the maximum width w2 of the orthographic projection of the second support member 61 on the surface of the second protective lens 50 facing the light-conducting layer 11 is in the range of 20μm≤w2≤60μm. Further, the maximum width w2 of the orthographic projection of the second support member 61 on the surface of the second protective lens 50 facing the light-conducting layer 11 is in the range of 20μm≤w2≤40μm. Specifically, the maximum width w2 of the orthographic projection of the second support member 61 on the surface of the second protective lens 50 facing the light conductive layer 11 can be but is not limited to 20μm, 23μm, 25μm, 28μm, 30μm, 33μm, 35μm, 38μm, 40μm, 45μm, 60μm, 70μm, 80μm, 90μm, 100μm, etc. When the maximum width w2 of the orthographic projection of the second support member 61 on the surface of the second protective lens 50 facing the light-conducting layer 11 is too small, the second support member 61 cannot produce sufficient supporting effect, and when the second protective lens 50 is recessed, the thickness of the air gap formed between the second protective lens 50 and the optical waveguide 10 is small, and there is still a risk of generating Newton's rings visible to the naked eye; when the maximum width w2 of the orthographic projection of the second support member 61 on the surface of the second protective lens 50 facing the light-conducting layer 11 is too large, the second support member 61 is too obvious and visible to the naked eye, and when the waveguide module 100 is applied to an augmented reality device, it affects the wearing visual experience of the augmented reality device.

[0073] In a specific embodiment, the range of the height h1 of each first support member 31 is: 8μm≤h1≤20μm; the range of the height h2 of each second support member 61 is: 8μm≤h2≤20μm; the range of the maximum width w1 of the orthographic projection of the first support member 31 on the surface of the first protective lens 20 facing the light transmission layer 11 is 20μm≤w1≤40μm; the range of the maximum width w2 of the orthographic projection of the second support member 61 on the surface of the second protective lens 50 facing the light transmission layer 11 is 20μm≤w2≤40μm. In this way, the first support member 31 and the second support member 61 can have a better supporting effect, and cannot be seen by the naked eye, and will not affect the optical display effect of the waveguide module 100, so that the waveguide module 100 has a better visual effect, and in addition, the waveguide module 100 can also have a thinner thickness.

[0074] See also Figure 6, optionally, the range of the shortest distance s1 between any two adjacent first support members 31 is 0.5mm≤s1≤5mm. Specifically, the shortest distance s1 between any two adjacent first support members 31 can be, but is not limited to, 0.5mm, 0.8mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, etc. When the shortest distance between any two adjacent first support members 31 is too small, the density of the first support member 31 is too large, and the transmittance of the waveguide module 100 is too low, affecting the wearing visual experience; when the shortest distance between any two adjacent first support members 31 is too large, the density of the first support member 31 is too small, the supporting force is insufficient, and the area between adjacent first support members 31 and first support members 31 still has the risk of generating Newton rings.

[0075] See also Figure 7 , optionally, the range of the shortest distance s2 between any two adjacent second support members 61 is 0.5mm≤s2≤5mm. Specifically, the shortest distance between any two adjacent second support members 61 can be but not limited to 0.5mm, 0.8mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, etc. When the shortest distance between any two adjacent second support members 61 is too small, the density of the second support members 61 is too large, and the transmittance of the waveguide module 100 is too low, affecting the wearing visual experience; when the shortest distance between any two adjacent second support members 61 is too large, the density of the second support members 61 is too small, the supporting force is insufficient, and the area between the adjacent second support members 61 and the second support members 61 is still at risk of generating Newton rings.

[0076] See also Figure 8 Optionally, the height of a portion of the multiple first support members 31 that abuts against the grating structure 12 at one end away from the first protective lens 20 is h1', and the height of a portion of the multiple first support members 31 that abuts against the light conductive layer 11 at one end away from the first protective lens 20 is h1", 0.1μm≤h1"-h1'≤0.4μm. In other words, the height of the region of the multiple first support members 31 corresponding to the grating structure 12 is 0.1μm to 0.4μm greater than the height of the region of the multiple first support members 31 corresponding to the non-grating structure 12. Specifically, h1″-h1′ can be, but is not limited to, 0.1μm, 0.15μm, 0.2μm, 0.25μm, 0.3μm, 0.35μm, 0.4μm, etc. The grating structure 12 will have a certain protrusion compared to the light-conducting layer 11, so that each first support member 31 can well support the light-conducting portion or the grating structure 12, avoiding a part that is too long, causing the shorter part to be suspended and unable to fully support the optical waveguide 10.

[0077] Optionally, the Shore A hardness H1 of the first support member 31 is in the range of: H1 ≥ 90HA. Specifically, the Shore A hardness of the first support member 31 may be, but is not limited to, 90HA, 92HA, 94HA, 96HA, 98HA, 100HA, etc. If the Shore A hardness of the first support member 31 is too low, the first support member 31 can better support the first protective lens 20, better prevent the first protective lens 20 from being dented, so that the first protective lens 20 and the optical waveguide 10 have better parallelism, and can better avoid the generation of Newton rings.

[0078] Optionally, the range of the Shore A hardness H2 of the second support member 61 is: H2 ≥ 90HA. Specifically, the Shore A hardness of the second support member 61 may be, but is not limited to, 90HA, 92HA, 94HA, 96HA, 98HA, 100HA, etc. If the Shore A hardness of the second support member 61 is too low, the second support member 61 can better support the second protective lens 50, better prevent the second protective lens 50 from being dented, so that the second protective lens 50 has better parallelism with the optical waveguide 10, and can better avoid the generation of Newton rings.

[0079] The first support layer 30 and the second support layer 60 of the embodiment of the present application can be prepared by screen printing. The first support layer 30 is used as an example for description. Fig. 9 and Fig.10 The method for preparing the first protective lens 20 having the first supporting layer 30 comprises:

[0080] S1, providing a first protective lens 20 and a screen printing plate 100a; wherein the screen printing plate 100a has a plurality of through holes 101a arranged in an array (such as Fig.11 shown);

[0081] Optionally, the screen printing plate 100a may be, but is not limited to, a nickel plate.

[0082] S2, attaching or overlapping the first protective lens 20 and the screen printing plate 100a;

[0083] S3, dripping glue on the surface of the screen printing plate 100a away from the first protective lens 20, and scraping the glue with a scraper to completely fill the plurality of through holes 101a on the screen printing plate 100a;

[0084] Optionally, the glue may be UV glue, for example, a glue of an acrylic system (such as polymethyl methacrylate, PMMA). Polymethyl methacrylate has a greater hardness, a stronger supporting capacity, and is not easily deformed.

[0085] S4, separating the screen printing plate 100a from the first protective lens 20, so that a plurality of glue droplets arranged in an array are formed on the first protective lens 20; and

[0086] S5 , performing curing so that the glue droplets form a first support member 31 , thereby obtaining a first support layer 30 .

[0087] Optionally, the curing may be thermal curing or photocuring such as UV light curing. The UV light curing may be performed by using a light source such as a mercury lamp or an LED lamp that can emit ultraviolet light.

[0088] Optionally, a large piece of the first protective lens 20 with the first support member 31 may be manufactured by silk-screen printing, and then cut into the shape and size required by the waveguide module 100, thereby reducing the risk of alignment accuracy.

[0089] In some embodiments, the first supporting layer 30 can also be prepared by other methods, such as exposure and development processes. Specifically, a layer of photoresist is first coated on the first protective lens 20, and then soft baking, exposure, development and hard baking processes are performed in sequence to form a first supporting layer 30 having multiple first supporting members 31.

[0090] See also Fig.12 and Fig.13 The embodiment of the present application further provides an augmented reality device 200, which includes: a projection optical machine 210 and a waveguide module 100 of the first aspect embodiment or the second aspect embodiment of the present application. The projection optical machine 210 is used to project a light signal, and the light signal includes image information; the waveguide module 100 is arranged on the exit surface of the projection optical machine 210, and is used to transmit the light signal and project the image information in the light signal.

[0091] Optionally, the projection optical machine 210 includes a display 211 and a lens 213. The display 211 is used to emit a light signal, and the lens 213 is arranged on the display surface side of the display 211, and is used to modulate the light signal, so that the light (light signal) of different viewing angles emitted from the same pixel point on the display 211 is modulated by the lens 213 and emitted in the form of parallel light, so that the image information in the light signal is at an infinite position so that it can be seen by the naked eye. The waveguide module 100 is arranged on the side of the lens 213 away from the display 211, and is used to transmit the light signal modulated by the lens 213.

[0092] Optionally, in one embodiment, the grating structure 12 of the optical waveguide 10 is disposed away from the projection optical engine 210. In another embodiment, the grating structure 12 of the optical waveguide 10 is disposed facing the projection optical engine 210, which is not specifically limited in the present application.

[0093] Optionally, the display 211 can be a micro display. The display 211 includes a light-emitting unit, and the light-emitting unit may include but is not limited to at least one of a micro light-emitting diode (Micro Light Emitting Diode, Micro LED) chip, a micro organic light-emitting diode (Micro Organic Light-Emitting Diode, Micro OLED) chip or a micro liquid crystal display (Micro LCD). Under the same operating power conditions, the brightness of Micro OLED is usually less than 5000nits, the brightness of LCD is usually less than 15000nits, and the brightness of Micro LED can reach 2000000nits, which is much higher than the former two. Therefore, compared with the Micro OLED display and the Micro LCD display, when the display 211 is a Micro LED display, the image it outputs has a higher brightness. Compared with the Micro LCD display, the Micro LED display is a self-luminous light source, and has better contrast and smaller display delay when applied to the augmented reality device 200.

[0094] In some embodiments, the area on the display surface that can emit light signals is called an effective light-emitting area, and the diagonal size of the effective light-emitting area of ​​the display 211 ranges from 0.11 inches to 0.15 inches, and the aspect ratio of the effective light-emitting area is 4: 3. In other embodiments, the diagonal size of the effective light-emitting area of ​​the display 211 ranges from 0.17 inches to 0.21 inches, and the aspect ratio of the effective light-emitting area is 16:9.

[0095] Optionally, the color of the light emitted by the display 211 may be, but is not limited to, at least one of red light, green light, blue light, etc. In a specific embodiment, the display 211 is a Micro LED that emits green light, and in other embodiments, it may also be other monochromatic Micro LEDs or polychromatic Micro LEDs. In some embodiments, the waveguide module 100 may also dilate the image information in the optical signal emitted by the lens 213 in one or two dimensions to increase the range of the eye sockets, thereby adapting to more people.

[0096] In some embodiments, the augmented reality device 200 of the present application further includes a carrier 220, and the carrier 220 is used to carry the waveguide module 100. Optionally, the carrier 220 may be, but is not limited to, a frame of augmented reality glasses, a helmet body of an augmented reality helmet, a mask body of an augmented reality mask, etc. Optionally, the waveguide module 100 may be disposed on the carrier 220 by an adhesive or a fastening portion.

[0097] The augmented reality device 200 of the present application may be, but is not limited to, a near-eye display device such as augmented reality glasses (AR glasses), an augmented reality helmet, an augmented reality mask, etc. It can be understood that the augmented reality device 200 in this embodiment is only one form of the augmented reality device 200 applied by the waveguide module 100, and should not be understood as a limitation on the augmented reality device 200 provided in the present application.

[0098] In some embodiments, when the augmented reality device 200 is an augmented reality glasses, the augmented reality device 200 of the embodiment of the present application further includes a wearing member 230. The wearing member 230 is rotatably connected to the bearing member 220, and the wearing member 230 is used to clamp the wearer (such as a human head, or a head prosthesis, etc.).

[0099] Optionally, the wearing component 230 includes a first wearing sub-component 231 and a second wearing sub-component 233, wherein the first wearing sub-component 231 is rotatably connected to one end of the supporting component 220, and the second wearing sub-component 233 is rotatably connected to the other end of the supporting component 220 away from the first wearing sub-component 231. The first wearing sub-component 231 cooperates with the second wearing sub-component 233 to clamp the augmented reality device 200 to the wearer. Optionally, the first wearing sub-component 231 and the second wearing sub-component 233 are also used to set a projection light machine. Optionally, the first wearing sub-component 231 and the second wearing sub-component 233 can be, but are not limited to, the temples of the augmented reality device 200 (AR glasses).

[0100] See also Fig.14 The augmented reality device 200 of the embodiment of the present application further includes a processor 240 and a memory 260. The processor 240 is electrically connected to the display 211, and is used to control the display 211 to emit a light signal having image information, etc. The memory 260 is electrically connected to the processor 240, and is used to store program codes required for the processor 240 to run, program codes required for controlling the display 211, image information emitted by the display 211, etc.

[0101] Optionally, the processor 240 includes one or more general-purpose processors, wherein the general-purpose processor can be any type of device capable of processing electronic instructions, including a central processing unit (CPU), a microprocessor, a microcontroller, a main processor, a controller, and an ASIC, etc. The processor 240 is used to execute various types of digital storage instructions, such as software or firmware programs stored in the memory 260, which enables the computing device to provide a wide variety of services.

[0102] Optionally, the memory 260 may include a volatile memory (Volatile Memory), such as a random access memory (Random Access Memory, RAM); the memory 260 may also include a non-volatile memory (NVM), such as a read-only memory (Read-Only Memory, ROM), a flash memory (Flash Memory, FM), a hard disk drive (Hard Disk Drive, HDD) or a solid-state drive (SSD). The memory 260 may also include a combination of the above-mentioned types of memory.

[0103] Mentioning "embodiment" and "implementation method" in this application means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of phrases in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments. In addition, it should also be understood that the features, structures or characteristics described in the various embodiments of the present application can be arbitrarily combined to form another embodiment that does not deviate from the spirit and scope of the technical solution of the present application, if there is no contradiction between them.

[0104] Finally, it should be noted that the above implementation modes are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the above preferred implementation modes, a person of ordinary skill in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A waveguide module, characterized in that: include: An optical waveguide, the optical waveguide comprising a light-conducting layer and a grating structure, wherein the grating structure is disposed on a surface of the light-conducting layer; A first protective lens, wherein the first protective lens is stacked and spaced apart and arranged on a side of the optical waveguide having the grating structure; A first supporting layer, the first supporting layer comprising a plurality of first supporting members, the plurality of first supporting members being arranged at intervals on a surface of the first protective lens facing the optical waveguide and connected to the first protective lens, a portion of the plurality of first supporting members having an end away from the first protective lens abutting against the light conductive layer, and another portion of the plurality of first supporting members having an end away from the first protective lens abutting against the grating structure; as well as A first adhesive member is disposed between the optical waveguide and the first protective lens and surrounds the outer periphery of the first supporting layer, and is used for bonding the optical waveguide and the first protective lens.

2. The waveguide module according to claim 1, characterized in that: The waveguide module also includes: A second protective lens, the second protective lens is stacked and spaced apart and arranged on a side of the optical waveguide away from the first protective lens; A second supporting layer, the second supporting layer comprising a plurality of second supporting members, the plurality of second supporting members being arranged at intervals on a surface of the second protective lens facing the optical waveguide and connected to the second protective lens, and an end of each second supporting member facing away from the second protective lens abuts against the optical waveguide; and The second adhesive member is disposed between the optical waveguide and the second protective lens and surrounds the outer periphery of the second supporting layer, and is used for bonding the optical waveguide and the second protective lens.

3. The waveguide module according to claim 2, characterized in that: Along the stacking direction of the first protective lens, the optical waveguide and the second protective lens: the height difference △h1 between any two of the multiple first support members is in the range of: 0≤△h1≤1μm, and the height difference △h2 between any two of the multiple second support members is in the range of: 0≤△h2≤1μm.

4. The waveguide module according to claim 2, characterized in that: Along the stacking direction of the first protective lens, the optical waveguide and the second protective lens: the range of the height h1 of each of the first supporting members is: 8μm≤h1≤30μm, and the range of the height h2 of each of the first supporting members is: 8μm≤h2≤30μm.

5. The waveguide module according to claim 2, characterized in that: The first adhesive component is compressible and adhesive, and the second adhesive component is compressible and adhesive. Along the stacking direction of the first protective lens, the optical waveguide and the second protective lens: the difference between the thickness d1 of the first adhesive component and the height h1 of the first supporting component is in the range of 2μm≤d1-h1≤4μm, and the difference between the thickness d2 of the second adhesive component and the height h2 of the second supporting component is in the range of 2μm≤d2-h2≤4μm.

6. The waveguide module according to claim 5, characterized in that: Along the stacking direction of the first protective lens, the optical waveguide and the second protective lens: the compression rate k1 of the first adhesive member is in the range of 10%≤k1≤20%, and the compression rate k2 of the second adhesive member is in the range of 10%≤k2≤20%.

7. The waveguide module according to claim 2, characterized in that: The maximum width w1 of the orthographic projection of the first support member on the surface of the first protective lens facing the light conductive layer is in the range of 20μm≤w1≤100μm; the maximum width w2 of the orthographic projection of the second support member on the surface of the second protective lens facing the light conductive layer is in the range of 20μm≤w2≤100μm.

8. The waveguide module according to any one of claims 2 to 7, characterized in that: The shortest distance s1 between any two adjacent first support members is in the range of 0.5 mm≤s1≤5 mm; the shortest distance s2 between any two adjacent second support members is in the range of 0.5 mm≤s2≤5 mm.

9. The waveguide module according to any one of claims 2 to 7, characterized in that: The height of a portion of the first supporting members that abuts against the grating structure at one end away from the first protective lens is h1', and the height of a portion of the first supporting members that abuts against the light conductive layer at one end away from the first protective lens is h1", 0.1μm≤h1"-h1'≤0.4μm.

10. An augmented reality device, characterized in that: include: A projection optical machine, the projection optical machine is used to project a light signal, the light signal includes image information; as well as The waveguide module according to any one of claims 1 to 9, wherein the waveguide module is used to transmit the optical signal and project the image information in the optical signal.

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