Waveguide module and intelligent glasses

Abstract

The invention discloses a waveguide module and intelligent glasses. The waveguide module comprises a waveguide layer; the first cover plate is located on the side, facing a user, of the waveguide layer, and a lens mounting hole is formed in the first cover plate; and the correction lenses are mounted in the lens mounting holes. The requirement of a user with visual impairment for imaging definition can be met, and the wearing comfort is improved, so that the use experience of the user is improved.

Description

Technical Field

[0001] The present application belongs to the field of three-dimensional display technology, and in particular to a waveguide module and smart glasses. Background Art

[0002] With the continuous development of science and technology, technologies such as augmented reality (AR) have gradually entered various industries. Taking AR devices as an example, users can use AR devices, such as AR glasses, to watch augmented reality scenes.

[0003] In the related art, AR glasses are usually designed for users with normal vision. For users with visual impairments, such as myopic users, the experience when using AR glasses is poor. Summary of the invention

[0004] The embodiments of the present application provide a waveguide module and smart glasses to solve the technical problem in the related art that AR glasses cannot meet the usage needs of myopic user groups.

[0005] In a first aspect, the present application provides a waveguide module for smart glasses, comprising:

[0006] waveguide layer;

[0007] A first cover plate, the first cover plate is located on a side of the waveguide layer facing the user, and the first cover plate is provided with a lens mounting hole;

[0008] A corrective lens is installed in the lens installation hole.

[0009] In some embodiments, the corrective lens is located on the side of the waveguide layer facing the user, and the corrective lens is located in the propagation path of the imaging light emitted by the waveguide layer, and is used to adjust the focal length of the imaging light emitted by the waveguide layer to correct the user's vision.

[0010] In some embodiments, a surface of the corrective lens facing away from the waveguide layer includes a corrective portion, and the corrective portion is used to adjust the focal length of the imaging light emitted by the waveguide layer to correct the user's vision.

[0011] In some embodiments, the correcting portion comprises: a concave surface that is recessed toward the waveguide layer.

[0012] In some embodiments, the corrective portion comprises: a convex surface protruding away from the waveguide layer.

[0013] In some embodiments, surfaces of the corrective lens and the first cover plate facing the waveguide layer are planar, and the surface of the corrective lens facing the waveguide layer is flush with the surface of the first cover plate facing the waveguide layer.

[0014] In some embodiments, the corrective lens is bonded to the wall of the lens mounting hole.

[0015] In some embodiments, the waveguide layer has an incoupling region for receiving imaging light and an outcoupling region for emitting imaging light;

[0016] Wherein, the coupling-in area corresponds to the optical-mechanical module of the smart glasses;

[0017] The orthographic projection of the corrective lens on the surface of the waveguide layer facing the corrective lens covers the outcoupling region.

[0018] In some embodiments, the shape and size of the lens mounting hole are compatible with the shape and size of the waveguide mounting hole, wherein the waveguide mounting hole is provided on the bracket of the smart glasses.

[0019] In some embodiments, along a direction perpendicular to the thickness of the waveguide module, an edge of the first cover plate extends beyond an edge of the waveguide layer, or an edge of the first cover plate is flush with an edge of the waveguide layer.

[0020] In some embodiments, the waveguide module further includes: a second cover plate, wherein the second cover plate is disposed on a side of the waveguide layer facing away from the first cover plate.

[0021] In some embodiments, along a direction perpendicular to the thickness of the waveguide module, an edge of the second cover plate extends beyond an edge of the waveguide layer, or an edge of the second cover plate is flush with an edge of the waveguide layer.

[0022] In some embodiments, the lens mounting hole comprises: a large aperture section and a small aperture section, the size of the large aperture section is larger than the size of the small aperture section, and the small aperture section is located on a side of the large aperture section facing the waveguide layer;

[0023] The size of the portion of the corrective lens that matches the small aperture segment is adapted to the size of the small aperture segment; the size of the remaining portion of the corrective lens is adapted to the size of the large aperture segment.

[0024] In a second aspect, the present application provides a pair of smart glasses, comprising:

[0025] A bracket, wherein the bracket is provided with a waveguide mounting hole;

[0026] A waveguide module, wherein the waveguide module is the waveguide module described in any one of the preceding items, and the waveguide module is installed in the waveguide installation hole.

[0027] In some embodiments, the smart glasses further include:

[0028] A fixing member is connected to opposite ends of the bracket and is used to fix the smart glasses to the user's head.

[0029] In some embodiments, the smart glasses further include:

[0030] An optical-mechanical module is installed in the connection area between the bracket and the fixing member, and is used for projecting imaging light to the waveguide module.

[0031] The waveguide module and smart glasses provided by the present application are provided with a waveguide layer, a corrective lens and a first cover plate, wherein the first cover plate is located on the side of the waveguide layer facing the user, and the first cover plate is provided with a lens mounting hole, and the corrective lens is mounted in the lens mounting hole. In this way, the corrective lens can be integrated into the waveguide module, and the installation and fixation of the corrective lens can be achieved through the first cover plate that protects the waveguide layer, without the need to add a special mounting structure for installing the corrective lens, which can not only meet the needs of users with visual impairments for imaging clarity, but also help to reduce the weight of smart glasses worn by users with visual impairments, improve wearing comfort, and thus enhance the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0033] Figure 1 A schematic diagram of the structure of smart glasses provided in one embodiment of the present application;

[0034] Figure 2 A schematic diagram of a partial decomposition structure of smart glasses provided in an embodiment of the present application;

[0035] Figure 3 A schematic diagram of the structure of a waveguide module provided in one embodiment of the present application;

[0036] Figure 4 A schematic diagram of the exploded structure of a waveguide module provided in one embodiment of the present application;

[0037] Figure 5 The corrective lens provided in one embodiment of the present application is Figure 3 Schematic diagram of the cross section at AA;

[0038] Figure 6 A schematic diagram of the assembly process of a waveguide module and a first cover plate provided in an embodiment of the present application;

[0039] Figure 7 The first cover plate provided in one embodiment of the present application is Figure 3 Schematic diagram of the cross section at AA in the middle;

[0040] Figure 8 The first cover plate and the waveguide module provided in one embodiment of the present application are Figure 3 Schematic diagram of the cross section at AA in the middle.

[0041] Description of Figure Numbers:

[0042] 1- bracket; 1a- waveguide mounting hole; 11- frame; 12- mounting seat;

[0043] 2-Fixer;

[0044] 3- Waveguide module;

[0045] 31- waveguide layer; 31a- coupling-in region; 31b- coupling-out region; 311- first sheet; 312- first extension portion;

[0046] 32-first cover plate; 321-lens mounting hole; 321a-large aperture section; 321b-small aperture section; 322-second sheet body; 323-second extension portion;

[0047] 33-correction lens; 331-correction part;

[0048] 34-second cover plate; 341-third sheet; 342-third extension portion;

[0049] 4- optical machine module; 41- optical machine lens; 42- screen. DETAILED DESCRIPTION

[0050] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, but cannot be understood as limiting the present application.

[0051] The term "including" and its variations used herein are open inclusions, i.e., "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the following description.

[0052] It should be noted that the concepts such as "first" and "second" mentioned in this application are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0053] It should be noted that the modifications of "one" and "plurality" mentioned in the present application are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0054] The embodiments of the present application can be applied to various application scenarios such as augmented reality (AR) and extended reality (XR).

[0055] Among them, augmented reality (AR) is a technology that calculates the camera's posture parameters in the real world (or three-dimensional world, real world) in real time during the process of the camera capturing images, and adds virtual elements to the images captured by the camera based on the camera posture parameters. Virtual elements include but are not limited to: images, videos and three-dimensional models. The goal of AR technology is to integrate the virtual world with the real world on the screen for interaction.

[0056] Augmented reality devices are terminals that realize augmented reality effects and can usually be provided in the form of glasses to achieve visual perception and other forms of perception.

[0057] In the related art, AR glasses are usually designed for users with normal vision. For users with visual impairments, such as myopia, a mounting bracket can be provided, and the optical lenses for correcting the user's vision are mounted on the mounting bracket, and then the mounting bracket is mounted on the AR glasses. This will cause the AR glasses worn by users with visual impairments to be heavier, which is not conducive to wearing comfort and affects the user's experience.

[0058] In order to overcome the above problems, the embodiments of the present application provide a waveguide module and smart glasses, which can integrate corrective lenses for correcting user vision into the waveguide module, and utilize components in the waveguide module to achieve installation and fixation of the corrective lenses. There is no need to add a mounting bracket specifically for installing the corrective lenses. This can not only meet the imaging clarity requirements of users with visual impairments, but also help to reduce the weight of smart glasses worn by users with visual impairments, improve wearing comfort, and thus enhance the user experience.

[0059] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0060] This embodiment provides a smart glasses, which may be AR glasses or other wearable glasses devices that utilize waveguide technology to implement various functions.

[0061] Figure 1 A schematic diagram of the three-dimensional structure of smart glasses provided in one embodiment of the present application; Figure 2 A schematic diagram of a partial decomposition structure of smart glasses provided in an embodiment of the present application 。 The arrow X in the figure is used to indicate the direction toward the user's eyes.

[0062] Please refer to Figure 1 and Figure 2 The smart glasses provided in this embodiment include: a bracket 1, a fixing member 2, a waveguide module 3, and an optical module 4. The bracket 1 is provided with a waveguide mounting hole 1a. The waveguide module 3 is installed in the waveguide mounting hole 1a; the fixing member 2 is connected to the opposite ends of the bracket 1, and is used to fix the smart glasses to the user's head. The optical module 4 is installed in the connection area between the bracket 1 and the fixing member 2, and is used to project imaging light to the waveguide module 3.

[0063] like Figure 2 As shown, the bracket 1 may include two connected frames 11, and the frame 11 may be a ring-shaped frame 11. The internal spaces of the two frames 11 respectively constitute waveguide mounting holes 1a. The two waveguide mounting holes 1a respectively correspond to the two eyes of the user. In addition, the connection area between the two frames 11 can be used to support the smart glasses on the user's nose. For ease of description, this embodiment will be described as an example.

[0064] In other examples, the bracket 1 may also include an annular frame 11, the internal space of the frame 11 constitutes a waveguide mounting hole 1a, and two waveguide modules 3 corresponding to the two eyes of the user are installed in the waveguide mounting hole 1a, or a waveguide module 3 that can correspond to the two eyes of the user is installed in the waveguide mounting hole 1a.

[0065] The opposite ends of the bracket 1, that is, the ends of the two frames 11 that are separated from each other, can be respectively connected to the fixing member 2, and the fixing member 2 is used to support the smart glasses on the user's head and enable the waveguide modules 3 installed in the two waveguide installation holes 1a to correspond to the user's eyes respectively. Exemplarily, the fixing member 2 can include temples.

[0066] In other examples, the fixing member 2 may also be other structures such as a strap that can fix the smart glasses on the user's head and enable the two waveguide mounting holes 1a of the bracket 1 to correspond to the user's eyes respectively.

[0067] like Figure 2As shown, the end portion where the bracket 1 is connected to the fixing member 2 is provided with a mounting seat 12, and the mounting seat 12 is used to mount the optical machine module 4. The optical machine module 4 serves as an image source and can output imaging light containing image data information.

[0068] Exemplarily, the optical machine module 4 includes: an optical machine lens 41 and a screen 42. The screen 42 is used to generate and output imaging light containing image data information. The screen 42 can be a MicoLED screen with high brightness, high resolution, high contrast, long service life, etc., or the screen 42 is a mini-LED display or other display that can emit incident light.

[0069] The optical mechanical lens 41 is used to transmit imaging light containing image data information. The optical mechanical lens 41 may include one or more lenses, which may include convex lenses and / or concave lenses and / or cemented lenses. The optical mechanical lens 41 may project the imaging light emitted by the screen 42 to the waveguide module 3 according to a preset optical path.

[0070] The waveguide module 3 is used to perform multiple total reflection propagation on the incident imaging light, so that the imaging light entering the user's eyes can form a virtual image corresponding to the image data information.

[0071] Figure 3 A schematic diagram of the three-dimensional structure of a waveguide module provided in one embodiment of the present application; Figure 4 Schematic diagram of the decomposed structure of the waveguide module provided in one embodiment of the present application 。 The arrow X in the figure is used to indicate the direction toward the user's eyes.

[0072] Please refer to Figure 3 and Figure 4 The waveguide module 3 may include: a waveguide layer 31, a corrective lens 33 and a first cover plate 32. The corrective lens 33 is located on the side of the waveguide layer 31 facing the user, and is located in the propagation path of the imaging light emitted by the waveguide layer 31. The corrective lens 33 is used to adjust the focal length of the imaging light emitted by the waveguide layer 31 to correct the user's vision. The first cover plate 32 is located on the side of the waveguide layer 31 facing the user, and is provided with a lens mounting hole 321, and the corrective lens 33 is fixedly mounted in the lens mounting hole 321.

[0073] The surface of the waveguide layer 31 has a certain periodic structure, which can perform multiple total reflections on the incident imaging light, guide the imaging light from one point to another, so that the imaging light can enter the user's eyes and form a virtual image corresponding to the image data information. Exemplarily, the waveguide layer 31 can be roughly elliptical, circular, or rectangular with rounded corners. The specific shape of the waveguide layer 31 can be set according to actual needs, and this embodiment is not specifically limited here.

[0074] like Figure 4 As shown, the waveguide layer 31 has a coupling region 31a for receiving imaging light and a coupling region 31b for emitting imaging light. The coupling region 31a corresponds to the optical module 4. Exemplarily, the orthographic projection of the optical module 4 on the surface of the waveguide layer 31 facing the corrective lens 33 can at least partially overlap with the orthographic projection of the coupling region 31a on the surface of the waveguide layer 31 facing the corrective lens 33, so that the imaging light emitted by the optical module 4 can accurately enter the coupling region 31a, which is conducive to improving the quality of the imaging image.

[0075] A corrective lens 33 is provided on the side of the waveguide layer 31 facing the user's eye. The corrective lens 33 can deflect the imaging light emitted from the outcoupling area 31b of the waveguide layer 31 to adjust the focal length of the imaging light, so that the final imaging image can meet the image clarity requirements of users with visual impairments.

[0076] Exemplarily, the orthographic projection of the corrective lens 33 on the surface of the waveguide layer 31 facing the corrective lens 33 covers the out-coupling region 31b. For example, the orthographic projection of the corrective lens 33 on the surface of the waveguide layer 31 facing the corrective lens 33 may overlap with the out-coupling region 31b. For another example, the orthographic projection of the corrective lens 33 on the surface of the waveguide layer 31 facing the corrective lens 33 partially overlaps with the out-coupling region 31b. In this way, the imaging light emitted from the out-coupling region 31b of the waveguide layer 31 can be deflected in the corrective lens 33, so that the virtual image finally displayed can meet the image clarity requirements of users with visual impairments.

[0077] The corrective lens 33 can be installed in the lens installation hole 321 of the first cover plate 32. The first cover plate 32 is located on the side of the waveguide layer 31 facing the user's eyes, which can not only protect the waveguide layer 31, but also install the corrective lens 33. The first cover plate 32 can be made of transparent material to minimize the adverse effect on light propagation.

[0078] In a direction perpendicular to the thickness of the waveguide module 3 (the thickness direction of the waveguide module 3 is parallel to the direction indicated by the arrow X in the figure), the edge of the first cover plate 32 is extended out of the edge of the waveguide layer 31, or the edge of the first cover plate 32 is flush with the edge of the waveguide layer 31. In specific implementation, along the circumference of the first cover plate 32, the edge of the first cover plate 32 may partially extend out of the edge of the waveguide layer 31, and the other part of the edge of the first cover plate 32 is flush with the edge of the waveguide layer 31; or the edge of the entire circumference of the first cover plate 32 extends out of the edge of the waveguide layer 31, or the edge of the entire circumference of the first cover plate 32 is flush with the edge of the waveguide layer 31. In this way, the first cover plate 32 can better cover the waveguide layer 31 and ensure the protection of the waveguide layer 31.

[0079] The shape of the first cover plate 32 may be adapted to the shape of the waveguide layer 31. For example, when the waveguide layer 31 is elliptical, the shape of the first cover plate 32 is also elliptical; when the waveguide layer 31 is circular, the first cover plate 32 is also circular; when the waveguide layer 31 is rectangular with rounded corners, the first cover plate 32 is also rectangular with rounded corners.

[0080] like Figure 4 As shown, the waveguide layer 31 has a first sheet 311 and a first extension 312, wherein the first sheet 311 is adapted to the waveguide mounting hole 1a on the bracket 1, and the first extension 312 is connected to the circumferential side of the first sheet 311 and connected to the circumferential side close to the optical machine module 4 (see Figure 2 ), the first extension portion 312 extends in a direction away from the center of the first sheet 311, so that the first extension portion 312 can be connected to the optical machine module 4 (see Figure 2 The coupling-in region 31a is located at the first extension portion 312 , and the coupling-out region 31b is located at the first sheet body 311 .

[0081] An avoidance hole (not shown) is provided on the hole wall of the waveguide mounting hole 1a, and the avoidance hole is used for the first extension part 312 to pass through, so that the coupling-in area 31a located in the first extension part 312 can be opposite to the optical machine module 4.

[0082] Correspondingly, the first cover plate 32 may include a second sheet 322 and a second extension 323 . The shape of the second sheet 322 matches the shape of the first sheet 311 , and the shape of the second extension 323 matches the shape of the first extension 312 . The lens mounting hole 321 is disposed on the second sheet 322 .

[0083] The waveguide module 3 provided in this embodiment is provided with a waveguide layer 31, a corrective lens 33 and a first cover plate 32. The first cover plate 32 is located on the side of the waveguide layer 31 facing the user. The first cover plate 32 is provided with a lens mounting hole 321. The corrective lens 33 is fixedly mounted in the lens mounting hole 321. In this way, the corrective lens 33 can be integrated into the waveguide module 3, and the corrective lens 33 can be installed and fixed by the first cover plate 32 that protects the waveguide layer 31. There is no need to add a special mounting structure for mounting the corrective lens 33. It can not only meet the needs of users with visual impairments for imaging clarity, but also help to reduce the weight of the smart glasses worn by users with visual impairments, improve wearing comfort, and thus enhance the user experience.

[0084] In some embodiments, please refer to Figures 3 to 5The surface of the corrective lens 33 facing away from the waveguide layer 31 includes a corrective portion 331, which is used to adjust the focal length of the imaging light emitted by the waveguide layer 31 to correct the user's vision. The corrective portion 331 includes: a concave surface that is concave toward the waveguide layer 31 to meet the needs of myopic users. The specific parameters of the concave surface can be set according to actual needs.

[0085] In other embodiments, the correction portion 331 may also include: a convex surface (not shown in the figure) protruding away from the waveguide layer 31 to meet the usage needs of hyperopic users, wherein the specific parameters of the convex surface can be set according to actual needs.

[0086] In other embodiments, the correction portion 331 may also include curved surfaces of other shapes to meet the needs of users with corresponding visual impairments. In addition, other functional layers may also be integrated into the correction lens 33, such as a blue light protection layer.

[0087] In some embodiments, the surfaces of the corrective lens 33 and the first cover plate 32 facing the waveguide layer 31 are planes, and the surface of the corrective lens 33 facing the waveguide layer 31 is flush with the surface of the first cover plate 32 facing the waveguide layer 31. In this way, it is easy to fit the corrective lens 33 and the first cover plate 32 to the waveguide layer 31. In addition, during the assembly process, due to the difference in shape of the two opposite surfaces of the corrective lens 33, it is also possible to avoid the corrective lens 33 from being installed upside down.

[0088] Exemplarily, the corrective lens 33 is bonded to the hole wall of the lens mounting hole 321 to ensure the installation reliability of the corrective lens 33 .

[0089] For specific implementation, please refer to Figure 6 First, use auxiliary tooling to fit the corrective lens 33 and the first cover plate 32 together, so that the surface of the corrective lens 33 facing the waveguide layer 31 is flush with the surface of the first cover plate 32 facing the waveguide layer 31; then, glue is applied along the circumference of the corrective lens 33, specifically, transparent glue is applied, and the transparent glue can flow between the corrective lens 33 and the hole wall of the lens mounting hole 321, so as to bond the corrective lens 33 to the first cover plate 32.

[0090] In other examples, a snap-in groove (not shown in the figure) can be provided on the hole wall of the lens mounting hole 321, and the corrective lens 33 can be placed in the lens mounting hole 321 using auxiliary tooling, and the portion of the corrective lens 33 close to the edge can be snapped into the snap-in groove to prevent the corrective lens 33 from falling off.

[0091] Please refer to Figure 7 and Figure 8In some embodiments, in order to facilitate the assembly of the corrective lens 33 and ensure the reliability of the installation, the lens installation hole 321 may be stepped. Exemplarily, the lens installation hole 321 may include a large aperture section 321a and a small aperture section 321b, the size of the large aperture section 321a is larger than the size of the small aperture section 321b, and the small aperture section 321b is located on the side of the large aperture section 321a facing the waveguide layer 31.

[0092] The portion of the corrective lens 33 near the edge may be in a stepped shape. The size of the portion of the corrective lens 33 facing the waveguide layer 31 is smaller than the size of the other portion. Specifically, the size of the portion of the corrective lens 33 that matches the small aperture segment 321b is adapted to the size of the small aperture segment 321b, and the size of the remaining portion of the corrective lens 33 is adapted to the size of the large aperture segment 321a, so that the portion of the corrective lens 33 facing the waveguide layer 31 can be inserted into the small aperture segment 321b of the lens mounting hole 321, which helps to ensure that the surface of the corrective lens 33 facing the waveguide layer 31 is flush with the surface of the first cover plate 32 facing the waveguide layer 31.

[0093] Through the above arrangement, a relatively large bonding area is provided between the corrective lens 33 and the lens mounting hole 321, which is conducive to ensuring the installation reliability of the corrective lens 33. The larger the size difference between the large aperture section 321a and the small aperture section 321b, the larger the bonding area between the corrective lens 33 and the lens mounting hole 321 can be.

[0094] In other examples, the large aperture section 321a may also be disposed on the side of the small aperture section 321b facing the waveguide layer 31, and accordingly, the size of the portion of the corrective lens 33 facing the waveguide layer 31 is larger than the size of the other portion.

[0095] In some embodiments, Figures 2 to 4 As shown, the shape and size of the lens mounting hole 321 match the shape and size of the waveguide mounting hole 1a. In this way, the integrity of the smart glasses can be improved, and the portion of the corrective lens 33 extending out of the lens mounting hole 321 in the direction away from the waveguide layer 31 can also cooperate with the waveguide mounting hole 1a, which is conducive to further improving the installation reliability of the corrective lens 33.

[0096] like Figure 4 As shown, in some embodiments, the waveguide module 3 further includes: a second cover plate 34 , which is disposed on a side of the waveguide layer 31 away from the first cover plate 32 , and the second cover plate 34 can protect the waveguide layer 31 .

[0097] Exemplarily, the shape of the second cover plate 34 may be adapted to the shape of the waveguide layer 31. For example, the second cover plate 34 may have a third sheet 341 and a third extension portion 342, wherein the shape of the third sheet 341 is adapted to the shape of the first sheet 311 of the waveguide layer 31, and the shape of the third extension portion 342 is adapted to the shape of the first extension portion 312 of the waveguide layer 31.

[0098] Among them, along the direction perpendicular to the thickness of the waveguide module 3, the edge of the second cover plate 34 is extended out of the edge of the waveguide layer 31, or the edge of the second cover plate 34 is flush with the edge of the waveguide layer 31. In specific implementation, along the circumference of the second cover plate 34, the edge of the second cover plate 34 may partially extend out of the edge of the waveguide layer 31, and the other part of the edge of the second cover plate 34 is flush with the edge of the waveguide layer 31; or the edge of the entire circumference of the second cover plate 34 extends out of the edge of the waveguide layer 31, or the edge of the entire circumference of the second cover plate 34 is flush with the edge of the waveguide layer 31. In this way, the second cover plate 34 can better cover the waveguide layer 31 and ensure the protection of the waveguide layer 31.

[0099] In other examples, the second cover plate 34 may be provided with a color-changing layer (not shown in the figure), which is used to adjust its transmittance according to the intensity of external imaging light, thereby improving the clarity, contrast and saturation of the image when used outdoors, and can enhance the user experience. The color-changing layer may be a photochromic layer or an electrochromic layer.

[0100] Please refer to Figures 3 to 8 This embodiment further provides a waveguide module 3. The structure, function and implementation process of the waveguide module 3 of this embodiment are the same as those of the waveguide module 3 in the aforementioned embodiment, and will not be repeated here.

[0101] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A waveguide module for smart glasses, characterized in that: include: waveguide layer; A first cover plate, the first cover plate is located on a side of the waveguide layer facing the user, and the first cover plate is provided with a lens mounting hole; A corrective lens is installed in the lens installation hole.

2. The waveguide module according to claim 1, characterized in that: The surface of the corrective lens facing away from the waveguide layer includes a corrective portion, and the corrective portion is used to adjust the focal length of the imaging light emitted by the waveguide layer; The correction portion includes: a concave surface that is recessed toward the waveguide layer; or the correction portion includes: a convex surface that is protruded away from the waveguide layer.

3. The waveguide module according to claim 1, characterized in that: The surfaces of the corrective lens and the first cover plate facing the waveguide layer are planes, and the surface of the corrective lens facing the waveguide layer is flush with the surface of the first cover plate facing the waveguide layer.

4. The waveguide module according to claim 1, characterized in that: The corrective lens is bonded to the hole wall of the lens mounting hole.

5. The waveguide module according to claim 1, characterized in that: The waveguide layer has an incoupling region for receiving imaging light and an outcoupling region for emitting imaging light; Wherein, the coupling-in area corresponds to the optical-mechanical module of the smart glasses; The orthographic projection of the corrective lens on the surface of the waveguide layer facing the corrective lens covers the outcoupling region.

6. The waveguide module according to claim 1, characterized in that: The shape and size of the lens mounting hole are compatible with the shape and size of the waveguide mounting hole, wherein the waveguide mounting hole is arranged on the bracket of the smart glasses.

7. The waveguide module according to claim 1, characterized in that: Along a direction perpendicular to the thickness of the waveguide module, an edge of the first cover plate extends out of an edge of the waveguide layer, or an edge of the first cover plate is flush with an edge of the waveguide layer.

8. The waveguide module according to claim 1, characterized in that: Also includes: a second cover plate, the second cover plate being arranged on a side of the waveguide layer facing away from the first cover plate; Wherein, along a direction perpendicular to the thickness of the waveguide module, an edge of the second cover plate extends out of an edge of the waveguide layer, or an edge of the second cover plate is flush with an edge of the waveguide layer.

9. The waveguide module according to claim 1, characterized in that: The lens mounting hole comprises: a large aperture section and a small aperture section, the size of the large aperture section is larger than the size of the small aperture section, and the small aperture section is located on a side of the large aperture section facing the waveguide layer; The size of the portion of the corrective lens that matches the small aperture segment is adapted to the size of the small aperture segment; the size of the remaining portion of the corrective lens is adapted to the size of the large aperture segment.

10. A smart glasses, characterized in that: include: A bracket, wherein the bracket is provided with a waveguide mounting hole; A waveguide module, wherein the waveguide module is the waveguide module according to any one of claims 1 to 9, and the waveguide module is installed in the waveguide installation hole.

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